| 1 | /* Lisp functions pertaining to editing. |
| 2 | |
| 3 | Copyright (C) 1985-1987, 1989, 1993-2014 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GNU Emacs. |
| 6 | |
| 7 | GNU Emacs is free software: you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation, either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | GNU Emacs is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | |
| 21 | #include <config.h> |
| 22 | #include <sys/types.h> |
| 23 | #include <stdio.h> |
| 24 | |
| 25 | #ifdef HAVE_PWD_H |
| 26 | #include <pwd.h> |
| 27 | #include <grp.h> |
| 28 | #endif |
| 29 | |
| 30 | #include <unistd.h> |
| 31 | |
| 32 | #ifdef HAVE_SYS_UTSNAME_H |
| 33 | #include <sys/utsname.h> |
| 34 | #endif |
| 35 | |
| 36 | #include "lisp.h" |
| 37 | |
| 38 | /* systime.h includes <sys/time.h> which, on some systems, is required |
| 39 | for <sys/resource.h>; thus systime.h must be included before |
| 40 | <sys/resource.h> */ |
| 41 | #include "systime.h" |
| 42 | |
| 43 | #if defined HAVE_SYS_RESOURCE_H |
| 44 | #include <sys/resource.h> |
| 45 | #endif |
| 46 | |
| 47 | #include <float.h> |
| 48 | #include <limits.h> |
| 49 | #include <intprops.h> |
| 50 | #include <strftime.h> |
| 51 | #include <verify.h> |
| 52 | |
| 53 | #include "intervals.h" |
| 54 | #include "character.h" |
| 55 | #include "buffer.h" |
| 56 | #include "coding.h" |
| 57 | #include "frame.h" |
| 58 | #include "window.h" |
| 59 | #include "blockinput.h" |
| 60 | |
| 61 | #define TM_YEAR_BASE 1900 |
| 62 | |
| 63 | #ifdef WINDOWSNT |
| 64 | extern Lisp_Object w32_get_internal_run_time (void); |
| 65 | #endif |
| 66 | |
| 67 | static Lisp_Object format_time_string (char const *, ptrdiff_t, struct timespec, |
| 68 | bool, struct tm *); |
| 69 | static int tm_diff (struct tm *, struct tm *); |
| 70 | static void update_buffer_properties (ptrdiff_t, ptrdiff_t); |
| 71 | |
| 72 | static Lisp_Object Qbuffer_access_fontify_functions; |
| 73 | |
| 74 | /* Symbol for the text property used to mark fields. */ |
| 75 | |
| 76 | Lisp_Object Qfield; |
| 77 | |
| 78 | /* A special value for Qfield properties. */ |
| 79 | |
| 80 | static Lisp_Object Qboundary; |
| 81 | |
| 82 | /* The startup value of the TZ environment variable so it can be |
| 83 | restored if the user calls set-time-zone-rule with a nil |
| 84 | argument. If null, the TZ environment variable was unset. */ |
| 85 | static char const *initial_tz; |
| 86 | |
| 87 | /* True if the static variable tzvalbuf (defined in |
| 88 | set_time_zone_rule) is part of 'environ'. */ |
| 89 | static bool tzvalbuf_in_environ; |
| 90 | |
| 91 | |
| 92 | void |
| 93 | init_editfns (void) |
| 94 | { |
| 95 | const char *user_name; |
| 96 | register char *p; |
| 97 | struct passwd *pw; /* password entry for the current user */ |
| 98 | Lisp_Object tem; |
| 99 | |
| 100 | /* Set up system_name even when dumping. */ |
| 101 | init_system_name (); |
| 102 | |
| 103 | #ifndef CANNOT_DUMP |
| 104 | /* Don't bother with this on initial start when just dumping out */ |
| 105 | if (!initialized) |
| 106 | return; |
| 107 | #endif /* not CANNOT_DUMP */ |
| 108 | |
| 109 | initial_tz = getenv ("TZ"); |
| 110 | tzvalbuf_in_environ = 0; |
| 111 | |
| 112 | pw = getpwuid (getuid ()); |
| 113 | #ifdef MSDOS |
| 114 | /* We let the real user name default to "root" because that's quite |
| 115 | accurate on MSDOG and because it lets Emacs find the init file. |
| 116 | (The DVX libraries override the Djgpp libraries here.) */ |
| 117 | Vuser_real_login_name = build_string (pw ? pw->pw_name : "root"); |
| 118 | #else |
| 119 | Vuser_real_login_name = build_string (pw ? pw->pw_name : "unknown"); |
| 120 | #endif |
| 121 | |
| 122 | /* Get the effective user name, by consulting environment variables, |
| 123 | or the effective uid if those are unset. */ |
| 124 | user_name = getenv ("LOGNAME"); |
| 125 | if (!user_name) |
| 126 | #ifdef WINDOWSNT |
| 127 | user_name = getenv ("USERNAME"); /* it's USERNAME on NT */ |
| 128 | #else /* WINDOWSNT */ |
| 129 | user_name = getenv ("USER"); |
| 130 | #endif /* WINDOWSNT */ |
| 131 | if (!user_name) |
| 132 | { |
| 133 | pw = getpwuid (geteuid ()); |
| 134 | user_name = pw ? pw->pw_name : "unknown"; |
| 135 | } |
| 136 | Vuser_login_name = build_string (user_name); |
| 137 | |
| 138 | /* If the user name claimed in the environment vars differs from |
| 139 | the real uid, use the claimed name to find the full name. */ |
| 140 | tem = Fstring_equal (Vuser_login_name, Vuser_real_login_name); |
| 141 | if (! NILP (tem)) |
| 142 | tem = Vuser_login_name; |
| 143 | else |
| 144 | { |
| 145 | uid_t euid = geteuid (); |
| 146 | tem = make_fixnum_or_float (euid); |
| 147 | } |
| 148 | Vuser_full_name = Fuser_full_name (tem); |
| 149 | |
| 150 | p = getenv ("NAME"); |
| 151 | if (p) |
| 152 | Vuser_full_name = build_string (p); |
| 153 | else if (NILP (Vuser_full_name)) |
| 154 | Vuser_full_name = build_string ("unknown"); |
| 155 | |
| 156 | #ifdef HAVE_SYS_UTSNAME_H |
| 157 | { |
| 158 | struct utsname uts; |
| 159 | uname (&uts); |
| 160 | Voperating_system_release = build_string (uts.release); |
| 161 | } |
| 162 | #else |
| 163 | Voperating_system_release = Qnil; |
| 164 | #endif |
| 165 | } |
| 166 | \f |
| 167 | DEFUN ("char-to-string", Fchar_to_string, Schar_to_string, 1, 1, 0, |
| 168 | doc: /* Convert arg CHAR to a string containing that character. |
| 169 | usage: (char-to-string CHAR) */) |
| 170 | (Lisp_Object character) |
| 171 | { |
| 172 | int c, len; |
| 173 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
| 174 | |
| 175 | CHECK_CHARACTER (character); |
| 176 | c = XFASTINT (character); |
| 177 | |
| 178 | len = CHAR_STRING (c, str); |
| 179 | return make_string_from_bytes ((char *) str, 1, len); |
| 180 | } |
| 181 | |
| 182 | DEFUN ("byte-to-string", Fbyte_to_string, Sbyte_to_string, 1, 1, 0, |
| 183 | doc: /* Convert arg BYTE to a unibyte string containing that byte. */) |
| 184 | (Lisp_Object byte) |
| 185 | { |
| 186 | unsigned char b; |
| 187 | CHECK_NUMBER (byte); |
| 188 | if (XINT (byte) < 0 || XINT (byte) > 255) |
| 189 | error ("Invalid byte"); |
| 190 | b = XINT (byte); |
| 191 | return make_string_from_bytes ((char *) &b, 1, 1); |
| 192 | } |
| 193 | |
| 194 | DEFUN ("string-to-char", Fstring_to_char, Sstring_to_char, 1, 1, 0, |
| 195 | doc: /* Return the first character in STRING. */) |
| 196 | (register Lisp_Object string) |
| 197 | { |
| 198 | register Lisp_Object val; |
| 199 | CHECK_STRING (string); |
| 200 | if (SCHARS (string)) |
| 201 | { |
| 202 | if (STRING_MULTIBYTE (string)) |
| 203 | XSETFASTINT (val, STRING_CHAR (SDATA (string))); |
| 204 | else |
| 205 | XSETFASTINT (val, SREF (string, 0)); |
| 206 | } |
| 207 | else |
| 208 | XSETFASTINT (val, 0); |
| 209 | return val; |
| 210 | } |
| 211 | |
| 212 | DEFUN ("point", Fpoint, Spoint, 0, 0, 0, |
| 213 | doc: /* Return value of point, as an integer. |
| 214 | Beginning of buffer is position (point-min). */) |
| 215 | (void) |
| 216 | { |
| 217 | Lisp_Object temp; |
| 218 | XSETFASTINT (temp, PT); |
| 219 | return temp; |
| 220 | } |
| 221 | |
| 222 | DEFUN ("point-marker", Fpoint_marker, Spoint_marker, 0, 0, 0, |
| 223 | doc: /* Return value of point, as a marker object. */) |
| 224 | (void) |
| 225 | { |
| 226 | return build_marker (current_buffer, PT, PT_BYTE); |
| 227 | } |
| 228 | |
| 229 | DEFUN ("goto-char", Fgoto_char, Sgoto_char, 1, 1, "NGoto char: ", |
| 230 | doc: /* Set point to POSITION, a number or marker. |
| 231 | Beginning of buffer is position (point-min), end is (point-max). |
| 232 | |
| 233 | The return value is POSITION. */) |
| 234 | (register Lisp_Object position) |
| 235 | { |
| 236 | if (MARKERP (position)) |
| 237 | set_point_from_marker (position); |
| 238 | else if (INTEGERP (position)) |
| 239 | SET_PT (clip_to_bounds (BEGV, XINT (position), ZV)); |
| 240 | else |
| 241 | wrong_type_argument (Qinteger_or_marker_p, position); |
| 242 | return position; |
| 243 | } |
| 244 | |
| 245 | |
| 246 | /* Return the start or end position of the region. |
| 247 | BEGINNINGP means return the start. |
| 248 | If there is no region active, signal an error. */ |
| 249 | |
| 250 | static Lisp_Object |
| 251 | region_limit (bool beginningp) |
| 252 | { |
| 253 | Lisp_Object m; |
| 254 | |
| 255 | if (!NILP (Vtransient_mark_mode) |
| 256 | && NILP (Vmark_even_if_inactive) |
| 257 | && NILP (BVAR (current_buffer, mark_active))) |
| 258 | xsignal0 (Qmark_inactive); |
| 259 | |
| 260 | m = Fmarker_position (BVAR (current_buffer, mark)); |
| 261 | if (NILP (m)) |
| 262 | error ("The mark is not set now, so there is no region"); |
| 263 | |
| 264 | /* Clip to the current narrowing (bug#11770). */ |
| 265 | return make_number ((PT < XFASTINT (m)) == beginningp |
| 266 | ? PT |
| 267 | : clip_to_bounds (BEGV, XFASTINT (m), ZV)); |
| 268 | } |
| 269 | |
| 270 | DEFUN ("region-beginning", Fregion_beginning, Sregion_beginning, 0, 0, 0, |
| 271 | doc: /* Return the integer value of point or mark, whichever is smaller. */) |
| 272 | (void) |
| 273 | { |
| 274 | return region_limit (1); |
| 275 | } |
| 276 | |
| 277 | DEFUN ("region-end", Fregion_end, Sregion_end, 0, 0, 0, |
| 278 | doc: /* Return the integer value of point or mark, whichever is larger. */) |
| 279 | (void) |
| 280 | { |
| 281 | return region_limit (0); |
| 282 | } |
| 283 | |
| 284 | DEFUN ("mark-marker", Fmark_marker, Smark_marker, 0, 0, 0, |
| 285 | doc: /* Return this buffer's mark, as a marker object. |
| 286 | Watch out! Moving this marker changes the mark position. |
| 287 | If you set the marker not to point anywhere, the buffer will have no mark. */) |
| 288 | (void) |
| 289 | { |
| 290 | return BVAR (current_buffer, mark); |
| 291 | } |
| 292 | |
| 293 | \f |
| 294 | /* Find all the overlays in the current buffer that touch position POS. |
| 295 | Return the number found, and store them in a vector in VEC |
| 296 | of length LEN. */ |
| 297 | |
| 298 | static ptrdiff_t |
| 299 | overlays_around (EMACS_INT pos, Lisp_Object *vec, ptrdiff_t len) |
| 300 | { |
| 301 | Lisp_Object overlay, start, end; |
| 302 | struct Lisp_Overlay *tail; |
| 303 | ptrdiff_t startpos, endpos; |
| 304 | ptrdiff_t idx = 0; |
| 305 | |
| 306 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
| 307 | { |
| 308 | XSETMISC (overlay, tail); |
| 309 | |
| 310 | end = OVERLAY_END (overlay); |
| 311 | endpos = OVERLAY_POSITION (end); |
| 312 | if (endpos < pos) |
| 313 | break; |
| 314 | start = OVERLAY_START (overlay); |
| 315 | startpos = OVERLAY_POSITION (start); |
| 316 | if (startpos <= pos) |
| 317 | { |
| 318 | if (idx < len) |
| 319 | vec[idx] = overlay; |
| 320 | /* Keep counting overlays even if we can't return them all. */ |
| 321 | idx++; |
| 322 | } |
| 323 | } |
| 324 | |
| 325 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
| 326 | { |
| 327 | XSETMISC (overlay, tail); |
| 328 | |
| 329 | start = OVERLAY_START (overlay); |
| 330 | startpos = OVERLAY_POSITION (start); |
| 331 | if (pos < startpos) |
| 332 | break; |
| 333 | end = OVERLAY_END (overlay); |
| 334 | endpos = OVERLAY_POSITION (end); |
| 335 | if (pos <= endpos) |
| 336 | { |
| 337 | if (idx < len) |
| 338 | vec[idx] = overlay; |
| 339 | idx++; |
| 340 | } |
| 341 | } |
| 342 | |
| 343 | return idx; |
| 344 | } |
| 345 | |
| 346 | DEFUN ("get-pos-property", Fget_pos_property, Sget_pos_property, 2, 3, 0, |
| 347 | doc: /* Return the value of POSITION's property PROP, in OBJECT. |
| 348 | Almost identical to `get-char-property' except for the following difference: |
| 349 | Whereas `get-char-property' returns the property of the char at (i.e. right |
| 350 | after) POSITION, this pays attention to properties's stickiness and overlays's |
| 351 | advancement settings, in order to find the property of POSITION itself, |
| 352 | i.e. the property that a char would inherit if it were inserted |
| 353 | at POSITION. */) |
| 354 | (Lisp_Object position, register Lisp_Object prop, Lisp_Object object) |
| 355 | { |
| 356 | CHECK_NUMBER_COERCE_MARKER (position); |
| 357 | |
| 358 | if (NILP (object)) |
| 359 | XSETBUFFER (object, current_buffer); |
| 360 | else if (WINDOWP (object)) |
| 361 | object = XWINDOW (object)->contents; |
| 362 | |
| 363 | if (!BUFFERP (object)) |
| 364 | /* pos-property only makes sense in buffers right now, since strings |
| 365 | have no overlays and no notion of insertion for which stickiness |
| 366 | could be obeyed. */ |
| 367 | return Fget_text_property (position, prop, object); |
| 368 | else |
| 369 | { |
| 370 | EMACS_INT posn = XINT (position); |
| 371 | ptrdiff_t noverlays; |
| 372 | Lisp_Object *overlay_vec, tem; |
| 373 | struct buffer *obuf = current_buffer; |
| 374 | USE_SAFE_ALLOCA; |
| 375 | |
| 376 | set_buffer_temp (XBUFFER (object)); |
| 377 | |
| 378 | /* First try with room for 40 overlays. */ |
| 379 | noverlays = 40; |
| 380 | overlay_vec = alloca (noverlays * sizeof *overlay_vec); |
| 381 | noverlays = overlays_around (posn, overlay_vec, noverlays); |
| 382 | |
| 383 | /* If there are more than 40, |
| 384 | make enough space for all, and try again. */ |
| 385 | if (noverlays > 40) |
| 386 | { |
| 387 | SAFE_ALLOCA_LISP (overlay_vec, noverlays); |
| 388 | noverlays = overlays_around (posn, overlay_vec, noverlays); |
| 389 | } |
| 390 | noverlays = sort_overlays (overlay_vec, noverlays, NULL); |
| 391 | |
| 392 | set_buffer_temp (obuf); |
| 393 | |
| 394 | /* Now check the overlays in order of decreasing priority. */ |
| 395 | while (--noverlays >= 0) |
| 396 | { |
| 397 | Lisp_Object ol = overlay_vec[noverlays]; |
| 398 | tem = Foverlay_get (ol, prop); |
| 399 | if (!NILP (tem)) |
| 400 | { |
| 401 | /* Check the overlay is indeed active at point. */ |
| 402 | Lisp_Object start = OVERLAY_START (ol), finish = OVERLAY_END (ol); |
| 403 | if ((OVERLAY_POSITION (start) == posn |
| 404 | && XMARKER (start)->insertion_type == 1) |
| 405 | || (OVERLAY_POSITION (finish) == posn |
| 406 | && XMARKER (finish)->insertion_type == 0)) |
| 407 | ; /* The overlay will not cover a char inserted at point. */ |
| 408 | else |
| 409 | { |
| 410 | SAFE_FREE (); |
| 411 | return tem; |
| 412 | } |
| 413 | } |
| 414 | } |
| 415 | SAFE_FREE (); |
| 416 | |
| 417 | { /* Now check the text properties. */ |
| 418 | int stickiness = text_property_stickiness (prop, position, object); |
| 419 | if (stickiness > 0) |
| 420 | return Fget_text_property (position, prop, object); |
| 421 | else if (stickiness < 0 |
| 422 | && XINT (position) > BUF_BEGV (XBUFFER (object))) |
| 423 | return Fget_text_property (make_number (XINT (position) - 1), |
| 424 | prop, object); |
| 425 | else |
| 426 | return Qnil; |
| 427 | } |
| 428 | } |
| 429 | } |
| 430 | |
| 431 | /* Find the field surrounding POS in *BEG and *END. If POS is nil, |
| 432 | the value of point is used instead. If BEG or END is null, |
| 433 | means don't store the beginning or end of the field. |
| 434 | |
| 435 | BEG_LIMIT and END_LIMIT serve to limit the ranged of the returned |
| 436 | results; they do not effect boundary behavior. |
| 437 | |
| 438 | If MERGE_AT_BOUNDARY is non-nil, then if POS is at the very first |
| 439 | position of a field, then the beginning of the previous field is |
| 440 | returned instead of the beginning of POS's field (since the end of a |
| 441 | field is actually also the beginning of the next input field, this |
| 442 | behavior is sometimes useful). Additionally in the MERGE_AT_BOUNDARY |
| 443 | non-nil case, if two fields are separated by a field with the special |
| 444 | value `boundary', and POS lies within it, then the two separated |
| 445 | fields are considered to be adjacent, and POS between them, when |
| 446 | finding the beginning and ending of the "merged" field. |
| 447 | |
| 448 | Either BEG or END may be 0, in which case the corresponding value |
| 449 | is not stored. */ |
| 450 | |
| 451 | static void |
| 452 | find_field (Lisp_Object pos, Lisp_Object merge_at_boundary, |
| 453 | Lisp_Object beg_limit, |
| 454 | ptrdiff_t *beg, Lisp_Object end_limit, ptrdiff_t *end) |
| 455 | { |
| 456 | /* Fields right before and after the point. */ |
| 457 | Lisp_Object before_field, after_field; |
| 458 | /* True if POS counts as the start of a field. */ |
| 459 | bool at_field_start = 0; |
| 460 | /* True if POS counts as the end of a field. */ |
| 461 | bool at_field_end = 0; |
| 462 | |
| 463 | if (NILP (pos)) |
| 464 | XSETFASTINT (pos, PT); |
| 465 | else |
| 466 | CHECK_NUMBER_COERCE_MARKER (pos); |
| 467 | |
| 468 | after_field |
| 469 | = get_char_property_and_overlay (pos, Qfield, Qnil, NULL); |
| 470 | before_field |
| 471 | = (XFASTINT (pos) > BEGV |
| 472 | ? get_char_property_and_overlay (make_number (XINT (pos) - 1), |
| 473 | Qfield, Qnil, NULL) |
| 474 | /* Using nil here would be a more obvious choice, but it would |
| 475 | fail when the buffer starts with a non-sticky field. */ |
| 476 | : after_field); |
| 477 | |
| 478 | /* See if we need to handle the case where MERGE_AT_BOUNDARY is nil |
| 479 | and POS is at beginning of a field, which can also be interpreted |
| 480 | as the end of the previous field. Note that the case where if |
| 481 | MERGE_AT_BOUNDARY is non-nil (see function comment) is actually the |
| 482 | more natural one; then we avoid treating the beginning of a field |
| 483 | specially. */ |
| 484 | if (NILP (merge_at_boundary)) |
| 485 | { |
| 486 | Lisp_Object field = Fget_pos_property (pos, Qfield, Qnil); |
| 487 | if (!EQ (field, after_field)) |
| 488 | at_field_end = 1; |
| 489 | if (!EQ (field, before_field)) |
| 490 | at_field_start = 1; |
| 491 | if (NILP (field) && at_field_start && at_field_end) |
| 492 | /* If an inserted char would have a nil field while the surrounding |
| 493 | text is non-nil, we're probably not looking at a |
| 494 | zero-length field, but instead at a non-nil field that's |
| 495 | not intended for editing (such as comint's prompts). */ |
| 496 | at_field_end = at_field_start = 0; |
| 497 | } |
| 498 | |
| 499 | /* Note about special `boundary' fields: |
| 500 | |
| 501 | Consider the case where the point (`.') is between the fields `x' and `y': |
| 502 | |
| 503 | xxxx.yyyy |
| 504 | |
| 505 | In this situation, if merge_at_boundary is non-nil, consider the |
| 506 | `x' and `y' fields as forming one big merged field, and so the end |
| 507 | of the field is the end of `y'. |
| 508 | |
| 509 | However, if `x' and `y' are separated by a special `boundary' field |
| 510 | (a field with a `field' char-property of 'boundary), then ignore |
| 511 | this special field when merging adjacent fields. Here's the same |
| 512 | situation, but with a `boundary' field between the `x' and `y' fields: |
| 513 | |
| 514 | xxx.BBBByyyy |
| 515 | |
| 516 | Here, if point is at the end of `x', the beginning of `y', or |
| 517 | anywhere in-between (within the `boundary' field), merge all |
| 518 | three fields and consider the beginning as being the beginning of |
| 519 | the `x' field, and the end as being the end of the `y' field. */ |
| 520 | |
| 521 | if (beg) |
| 522 | { |
| 523 | if (at_field_start) |
| 524 | /* POS is at the edge of a field, and we should consider it as |
| 525 | the beginning of the following field. */ |
| 526 | *beg = XFASTINT (pos); |
| 527 | else |
| 528 | /* Find the previous field boundary. */ |
| 529 | { |
| 530 | Lisp_Object p = pos; |
| 531 | if (!NILP (merge_at_boundary) && EQ (before_field, Qboundary)) |
| 532 | /* Skip a `boundary' field. */ |
| 533 | p = Fprevious_single_char_property_change (p, Qfield, Qnil, |
| 534 | beg_limit); |
| 535 | |
| 536 | p = Fprevious_single_char_property_change (p, Qfield, Qnil, |
| 537 | beg_limit); |
| 538 | *beg = NILP (p) ? BEGV : XFASTINT (p); |
| 539 | } |
| 540 | } |
| 541 | |
| 542 | if (end) |
| 543 | { |
| 544 | if (at_field_end) |
| 545 | /* POS is at the edge of a field, and we should consider it as |
| 546 | the end of the previous field. */ |
| 547 | *end = XFASTINT (pos); |
| 548 | else |
| 549 | /* Find the next field boundary. */ |
| 550 | { |
| 551 | if (!NILP (merge_at_boundary) && EQ (after_field, Qboundary)) |
| 552 | /* Skip a `boundary' field. */ |
| 553 | pos = Fnext_single_char_property_change (pos, Qfield, Qnil, |
| 554 | end_limit); |
| 555 | |
| 556 | pos = Fnext_single_char_property_change (pos, Qfield, Qnil, |
| 557 | end_limit); |
| 558 | *end = NILP (pos) ? ZV : XFASTINT (pos); |
| 559 | } |
| 560 | } |
| 561 | } |
| 562 | |
| 563 | \f |
| 564 | DEFUN ("delete-field", Fdelete_field, Sdelete_field, 0, 1, 0, |
| 565 | doc: /* Delete the field surrounding POS. |
| 566 | A field is a region of text with the same `field' property. |
| 567 | If POS is nil, the value of point is used for POS. */) |
| 568 | (Lisp_Object pos) |
| 569 | { |
| 570 | ptrdiff_t beg, end; |
| 571 | find_field (pos, Qnil, Qnil, &beg, Qnil, &end); |
| 572 | if (beg != end) |
| 573 | del_range (beg, end); |
| 574 | return Qnil; |
| 575 | } |
| 576 | |
| 577 | DEFUN ("field-string", Ffield_string, Sfield_string, 0, 1, 0, |
| 578 | doc: /* Return the contents of the field surrounding POS as a string. |
| 579 | A field is a region of text with the same `field' property. |
| 580 | If POS is nil, the value of point is used for POS. */) |
| 581 | (Lisp_Object pos) |
| 582 | { |
| 583 | ptrdiff_t beg, end; |
| 584 | find_field (pos, Qnil, Qnil, &beg, Qnil, &end); |
| 585 | return make_buffer_string (beg, end, 1); |
| 586 | } |
| 587 | |
| 588 | DEFUN ("field-string-no-properties", Ffield_string_no_properties, Sfield_string_no_properties, 0, 1, 0, |
| 589 | doc: /* Return the contents of the field around POS, without text properties. |
| 590 | A field is a region of text with the same `field' property. |
| 591 | If POS is nil, the value of point is used for POS. */) |
| 592 | (Lisp_Object pos) |
| 593 | { |
| 594 | ptrdiff_t beg, end; |
| 595 | find_field (pos, Qnil, Qnil, &beg, Qnil, &end); |
| 596 | return make_buffer_string (beg, end, 0); |
| 597 | } |
| 598 | |
| 599 | DEFUN ("field-beginning", Ffield_beginning, Sfield_beginning, 0, 3, 0, |
| 600 | doc: /* Return the beginning of the field surrounding POS. |
| 601 | A field is a region of text with the same `field' property. |
| 602 | If POS is nil, the value of point is used for POS. |
| 603 | If ESCAPE-FROM-EDGE is non-nil and POS is at the beginning of its |
| 604 | field, then the beginning of the *previous* field is returned. |
| 605 | If LIMIT is non-nil, it is a buffer position; if the beginning of the field |
| 606 | is before LIMIT, then LIMIT will be returned instead. */) |
| 607 | (Lisp_Object pos, Lisp_Object escape_from_edge, Lisp_Object limit) |
| 608 | { |
| 609 | ptrdiff_t beg; |
| 610 | find_field (pos, escape_from_edge, limit, &beg, Qnil, 0); |
| 611 | return make_number (beg); |
| 612 | } |
| 613 | |
| 614 | DEFUN ("field-end", Ffield_end, Sfield_end, 0, 3, 0, |
| 615 | doc: /* Return the end of the field surrounding POS. |
| 616 | A field is a region of text with the same `field' property. |
| 617 | If POS is nil, the value of point is used for POS. |
| 618 | If ESCAPE-FROM-EDGE is non-nil and POS is at the end of its field, |
| 619 | then the end of the *following* field is returned. |
| 620 | If LIMIT is non-nil, it is a buffer position; if the end of the field |
| 621 | is after LIMIT, then LIMIT will be returned instead. */) |
| 622 | (Lisp_Object pos, Lisp_Object escape_from_edge, Lisp_Object limit) |
| 623 | { |
| 624 | ptrdiff_t end; |
| 625 | find_field (pos, escape_from_edge, Qnil, 0, limit, &end); |
| 626 | return make_number (end); |
| 627 | } |
| 628 | |
| 629 | DEFUN ("constrain-to-field", Fconstrain_to_field, Sconstrain_to_field, 2, 5, 0, |
| 630 | doc: /* Return the position closest to NEW-POS that is in the same field as OLD-POS. |
| 631 | A field is a region of text with the same `field' property. |
| 632 | |
| 633 | If NEW-POS is nil, then use the current point instead, and move point |
| 634 | to the resulting constrained position, in addition to returning that |
| 635 | position. |
| 636 | |
| 637 | If OLD-POS is at the boundary of two fields, then the allowable |
| 638 | positions for NEW-POS depends on the value of the optional argument |
| 639 | ESCAPE-FROM-EDGE: If ESCAPE-FROM-EDGE is nil, then NEW-POS is |
| 640 | constrained to the field that has the same `field' char-property |
| 641 | as any new characters inserted at OLD-POS, whereas if ESCAPE-FROM-EDGE |
| 642 | is non-nil, NEW-POS is constrained to the union of the two adjacent |
| 643 | fields. Additionally, if two fields are separated by another field with |
| 644 | the special value `boundary', then any point within this special field is |
| 645 | also considered to be `on the boundary'. |
| 646 | |
| 647 | If the optional argument ONLY-IN-LINE is non-nil and constraining |
| 648 | NEW-POS would move it to a different line, NEW-POS is returned |
| 649 | unconstrained. This is useful for commands that move by line, like |
| 650 | \\[next-line] or \\[beginning-of-line], which should generally respect field boundaries |
| 651 | only in the case where they can still move to the right line. |
| 652 | |
| 653 | If the optional argument INHIBIT-CAPTURE-PROPERTY is non-nil, and OLD-POS has |
| 654 | a non-nil property of that name, then any field boundaries are ignored. |
| 655 | |
| 656 | Field boundaries are not noticed if `inhibit-field-text-motion' is non-nil. */) |
| 657 | (Lisp_Object new_pos, Lisp_Object old_pos, Lisp_Object escape_from_edge, |
| 658 | Lisp_Object only_in_line, Lisp_Object inhibit_capture_property) |
| 659 | { |
| 660 | /* If non-zero, then the original point, before re-positioning. */ |
| 661 | ptrdiff_t orig_point = 0; |
| 662 | bool fwd; |
| 663 | Lisp_Object prev_old, prev_new; |
| 664 | |
| 665 | if (NILP (new_pos)) |
| 666 | /* Use the current point, and afterwards, set it. */ |
| 667 | { |
| 668 | orig_point = PT; |
| 669 | XSETFASTINT (new_pos, PT); |
| 670 | } |
| 671 | |
| 672 | CHECK_NUMBER_COERCE_MARKER (new_pos); |
| 673 | CHECK_NUMBER_COERCE_MARKER (old_pos); |
| 674 | |
| 675 | fwd = (XINT (new_pos) > XINT (old_pos)); |
| 676 | |
| 677 | prev_old = make_number (XINT (old_pos) - 1); |
| 678 | prev_new = make_number (XINT (new_pos) - 1); |
| 679 | |
| 680 | if (NILP (Vinhibit_field_text_motion) |
| 681 | && !EQ (new_pos, old_pos) |
| 682 | && (!NILP (Fget_char_property (new_pos, Qfield, Qnil)) |
| 683 | || !NILP (Fget_char_property (old_pos, Qfield, Qnil)) |
| 684 | /* To recognize field boundaries, we must also look at the |
| 685 | previous positions; we could use `Fget_pos_property' |
| 686 | instead, but in itself that would fail inside non-sticky |
| 687 | fields (like comint prompts). */ |
| 688 | || (XFASTINT (new_pos) > BEGV |
| 689 | && !NILP (Fget_char_property (prev_new, Qfield, Qnil))) |
| 690 | || (XFASTINT (old_pos) > BEGV |
| 691 | && !NILP (Fget_char_property (prev_old, Qfield, Qnil)))) |
| 692 | && (NILP (inhibit_capture_property) |
| 693 | /* Field boundaries are again a problem; but now we must |
| 694 | decide the case exactly, so we need to call |
| 695 | `get_pos_property' as well. */ |
| 696 | || (NILP (Fget_pos_property (old_pos, inhibit_capture_property, Qnil)) |
| 697 | && (XFASTINT (old_pos) <= BEGV |
| 698 | || NILP (Fget_char_property |
| 699 | (old_pos, inhibit_capture_property, Qnil)) |
| 700 | || NILP (Fget_char_property |
| 701 | (prev_old, inhibit_capture_property, Qnil)))))) |
| 702 | /* It is possible that NEW_POS is not within the same field as |
| 703 | OLD_POS; try to move NEW_POS so that it is. */ |
| 704 | { |
| 705 | ptrdiff_t shortage; |
| 706 | Lisp_Object field_bound; |
| 707 | |
| 708 | if (fwd) |
| 709 | field_bound = Ffield_end (old_pos, escape_from_edge, new_pos); |
| 710 | else |
| 711 | field_bound = Ffield_beginning (old_pos, escape_from_edge, new_pos); |
| 712 | |
| 713 | if (/* See if ESCAPE_FROM_EDGE caused FIELD_BOUND to jump to the |
| 714 | other side of NEW_POS, which would mean that NEW_POS is |
| 715 | already acceptable, and it's not necessary to constrain it |
| 716 | to FIELD_BOUND. */ |
| 717 | ((XFASTINT (field_bound) < XFASTINT (new_pos)) ? fwd : !fwd) |
| 718 | /* NEW_POS should be constrained, but only if either |
| 719 | ONLY_IN_LINE is nil (in which case any constraint is OK), |
| 720 | or NEW_POS and FIELD_BOUND are on the same line (in which |
| 721 | case the constraint is OK even if ONLY_IN_LINE is non-nil). */ |
| 722 | && (NILP (only_in_line) |
| 723 | /* This is the ONLY_IN_LINE case, check that NEW_POS and |
| 724 | FIELD_BOUND are on the same line by seeing whether |
| 725 | there's an intervening newline or not. */ |
| 726 | || (find_newline (XFASTINT (new_pos), -1, |
| 727 | XFASTINT (field_bound), -1, |
| 728 | fwd ? -1 : 1, &shortage, NULL, 1), |
| 729 | shortage != 0))) |
| 730 | /* Constrain NEW_POS to FIELD_BOUND. */ |
| 731 | new_pos = field_bound; |
| 732 | |
| 733 | if (orig_point && XFASTINT (new_pos) != orig_point) |
| 734 | /* The NEW_POS argument was originally nil, so automatically set PT. */ |
| 735 | SET_PT (XFASTINT (new_pos)); |
| 736 | } |
| 737 | |
| 738 | return new_pos; |
| 739 | } |
| 740 | |
| 741 | \f |
| 742 | DEFUN ("line-beginning-position", |
| 743 | Fline_beginning_position, Sline_beginning_position, 0, 1, 0, |
| 744 | doc: /* Return the character position of the first character on the current line. |
| 745 | With optional argument N, scan forward N - 1 lines first. |
| 746 | If the scan reaches the end of the buffer, return that position. |
| 747 | |
| 748 | This function ignores text display directionality; it returns the |
| 749 | position of the first character in logical order, i.e. the smallest |
| 750 | character position on the line. |
| 751 | |
| 752 | This function constrains the returned position to the current field |
| 753 | unless that position would be on a different line than the original, |
| 754 | unconstrained result. If N is nil or 1, and a front-sticky field |
| 755 | starts at point, the scan stops as soon as it starts. To ignore field |
| 756 | boundaries, bind `inhibit-field-text-motion' to t. |
| 757 | |
| 758 | This function does not move point. */) |
| 759 | (Lisp_Object n) |
| 760 | { |
| 761 | ptrdiff_t orig, orig_byte, end; |
| 762 | dynwind_begin (); |
| 763 | specbind (Qinhibit_point_motion_hooks, Qt); |
| 764 | |
| 765 | if (NILP (n)) |
| 766 | XSETFASTINT (n, 1); |
| 767 | else |
| 768 | CHECK_NUMBER (n); |
| 769 | |
| 770 | orig = PT; |
| 771 | orig_byte = PT_BYTE; |
| 772 | Fforward_line (make_number (XINT (n) - 1)); |
| 773 | end = PT; |
| 774 | |
| 775 | SET_PT_BOTH (orig, orig_byte); |
| 776 | |
| 777 | dynwind_end (); |
| 778 | |
| 779 | /* Return END constrained to the current input field. */ |
| 780 | return Fconstrain_to_field (make_number (end), make_number (orig), |
| 781 | XINT (n) != 1 ? Qt : Qnil, |
| 782 | Qt, Qnil); |
| 783 | } |
| 784 | |
| 785 | DEFUN ("line-end-position", Fline_end_position, Sline_end_position, 0, 1, 0, |
| 786 | doc: /* Return the character position of the last character on the current line. |
| 787 | With argument N not nil or 1, move forward N - 1 lines first. |
| 788 | If scan reaches end of buffer, return that position. |
| 789 | |
| 790 | This function ignores text display directionality; it returns the |
| 791 | position of the last character in logical order, i.e. the largest |
| 792 | character position on the line. |
| 793 | |
| 794 | This function constrains the returned position to the current field |
| 795 | unless that would be on a different line than the original, |
| 796 | unconstrained result. If N is nil or 1, and a rear-sticky field ends |
| 797 | at point, the scan stops as soon as it starts. To ignore field |
| 798 | boundaries bind `inhibit-field-text-motion' to t. |
| 799 | |
| 800 | This function does not move point. */) |
| 801 | (Lisp_Object n) |
| 802 | { |
| 803 | ptrdiff_t clipped_n; |
| 804 | ptrdiff_t end_pos; |
| 805 | ptrdiff_t orig = PT; |
| 806 | |
| 807 | if (NILP (n)) |
| 808 | XSETFASTINT (n, 1); |
| 809 | else |
| 810 | CHECK_NUMBER (n); |
| 811 | |
| 812 | clipped_n = clip_to_bounds (PTRDIFF_MIN + 1, XINT (n), PTRDIFF_MAX); |
| 813 | end_pos = find_before_next_newline (orig, 0, clipped_n - (clipped_n <= 0), |
| 814 | NULL); |
| 815 | |
| 816 | /* Return END_POS constrained to the current input field. */ |
| 817 | return Fconstrain_to_field (make_number (end_pos), make_number (orig), |
| 818 | Qnil, Qt, Qnil); |
| 819 | } |
| 820 | |
| 821 | /* Save current buffer state for `save-excursion' special form. |
| 822 | We (ab)use Lisp_Misc_Save_Value to allow explicit free and so |
| 823 | offload some work from GC. */ |
| 824 | |
| 825 | Lisp_Object |
| 826 | save_excursion_save (void) |
| 827 | { |
| 828 | return make_save_obj_obj_obj_obj |
| 829 | (Fpoint_marker (), |
| 830 | /* Do not copy the mark if it points to nowhere. */ |
| 831 | (XMARKER (BVAR (current_buffer, mark))->buffer |
| 832 | ? Fcopy_marker (BVAR (current_buffer, mark), Qnil) |
| 833 | : Qnil), |
| 834 | /* Selected window if current buffer is shown in it, nil otherwise. */ |
| 835 | (EQ (XWINDOW (selected_window)->contents, Fcurrent_buffer ()) |
| 836 | ? selected_window : Qnil), |
| 837 | BVAR (current_buffer, mark_active)); |
| 838 | } |
| 839 | |
| 840 | /* Restore saved buffer before leaving `save-excursion' special form. */ |
| 841 | |
| 842 | void |
| 843 | save_excursion_restore (Lisp_Object info) |
| 844 | { |
| 845 | Lisp_Object tem, tem1, omark, nmark; |
| 846 | struct gcpro gcpro1, gcpro2, gcpro3; |
| 847 | |
| 848 | tem = Fmarker_buffer (XSAVE_OBJECT (info, 0)); |
| 849 | /* If we're unwinding to top level, saved buffer may be deleted. This |
| 850 | means that all of its markers are unchained and so tem is nil. */ |
| 851 | if (NILP (tem)) |
| 852 | goto out; |
| 853 | |
| 854 | omark = nmark = Qnil; |
| 855 | GCPRO3 (info, omark, nmark); |
| 856 | |
| 857 | Fset_buffer (tem); |
| 858 | |
| 859 | /* Point marker. */ |
| 860 | tem = XSAVE_OBJECT (info, 0); |
| 861 | Fgoto_char (tem); |
| 862 | unchain_marker (XMARKER (tem)); |
| 863 | |
| 864 | /* Mark marker. */ |
| 865 | tem = XSAVE_OBJECT (info, 1); |
| 866 | omark = Fmarker_position (BVAR (current_buffer, mark)); |
| 867 | if (NILP (tem)) |
| 868 | unchain_marker (XMARKER (BVAR (current_buffer, mark))); |
| 869 | else |
| 870 | { |
| 871 | Fset_marker (BVAR (current_buffer, mark), tem, Fcurrent_buffer ()); |
| 872 | nmark = Fmarker_position (tem); |
| 873 | unchain_marker (XMARKER (tem)); |
| 874 | } |
| 875 | |
| 876 | /* Mark active. */ |
| 877 | tem = XSAVE_OBJECT (info, 3); |
| 878 | tem1 = BVAR (current_buffer, mark_active); |
| 879 | bset_mark_active (current_buffer, tem); |
| 880 | |
| 881 | /* If mark is active now, and either was not active |
| 882 | or was at a different place, run the activate hook. */ |
| 883 | if (! NILP (tem)) |
| 884 | { |
| 885 | if (! EQ (omark, nmark)) |
| 886 | { |
| 887 | tem = intern ("activate-mark-hook"); |
| 888 | Frun_hooks (1, &tem); |
| 889 | } |
| 890 | } |
| 891 | /* If mark has ceased to be active, run deactivate hook. */ |
| 892 | else if (! NILP (tem1)) |
| 893 | { |
| 894 | tem = intern ("deactivate-mark-hook"); |
| 895 | Frun_hooks (1, &tem); |
| 896 | } |
| 897 | |
| 898 | /* If buffer was visible in a window, and a different window was |
| 899 | selected, and the old selected window is still showing this |
| 900 | buffer, restore point in that window. */ |
| 901 | tem = XSAVE_OBJECT (info, 2); |
| 902 | if (WINDOWP (tem) |
| 903 | && !EQ (tem, selected_window) |
| 904 | && (tem1 = XWINDOW (tem)->contents, |
| 905 | (/* Window is live... */ |
| 906 | BUFFERP (tem1) |
| 907 | /* ...and it shows the current buffer. */ |
| 908 | && XBUFFER (tem1) == current_buffer))) |
| 909 | Fset_window_point (tem, make_number (PT)); |
| 910 | |
| 911 | UNGCPRO; |
| 912 | |
| 913 | out: |
| 914 | |
| 915 | free_misc (info); |
| 916 | } |
| 917 | |
| 918 | DEFUN ("save-excursion", Fsave_excursion, Ssave_excursion, 0, UNEVALLED, 0, |
| 919 | doc: /* Save point, mark, and current buffer; execute BODY; restore those things. |
| 920 | Executes BODY just like `progn'. |
| 921 | The values of point, mark and the current buffer are restored |
| 922 | even in case of abnormal exit (throw or error). |
| 923 | The state of activation of the mark is also restored. |
| 924 | |
| 925 | This construct does not save `deactivate-mark', and therefore |
| 926 | functions that change the buffer will still cause deactivation |
| 927 | of the mark at the end of the command. To prevent that, bind |
| 928 | `deactivate-mark' with `let'. |
| 929 | |
| 930 | If you only want to save the current buffer but not point nor mark, |
| 931 | then just use `save-current-buffer', or even `with-current-buffer'. |
| 932 | |
| 933 | usage: (save-excursion &rest BODY) */) |
| 934 | (Lisp_Object args) |
| 935 | { |
| 936 | register Lisp_Object val; |
| 937 | dynwind_begin (); |
| 938 | |
| 939 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
| 940 | |
| 941 | val = Fprogn (args); |
| 942 | dynwind_end (); |
| 943 | return val; |
| 944 | } |
| 945 | |
| 946 | DEFUN ("save-current-buffer", Fsave_current_buffer, Ssave_current_buffer, 0, UNEVALLED, 0, |
| 947 | doc: /* Record which buffer is current; execute BODY; make that buffer current. |
| 948 | BODY is executed just like `progn'. |
| 949 | usage: (save-current-buffer &rest BODY) */) |
| 950 | (Lisp_Object args) |
| 951 | { |
| 952 | dynwind_begin (); |
| 953 | |
| 954 | record_unwind_current_buffer (); |
| 955 | Lisp_Object tem0 = Fprogn (args); |
| 956 | dynwind_end (); |
| 957 | return tem0; |
| 958 | } |
| 959 | \f |
| 960 | DEFUN ("buffer-size", Fbuffer_size, Sbuffer_size, 0, 1, 0, |
| 961 | doc: /* Return the number of characters in the current buffer. |
| 962 | If BUFFER, return the number of characters in that buffer instead. */) |
| 963 | (Lisp_Object buffer) |
| 964 | { |
| 965 | if (NILP (buffer)) |
| 966 | return make_number (Z - BEG); |
| 967 | else |
| 968 | { |
| 969 | CHECK_BUFFER (buffer); |
| 970 | return make_number (BUF_Z (XBUFFER (buffer)) |
| 971 | - BUF_BEG (XBUFFER (buffer))); |
| 972 | } |
| 973 | } |
| 974 | |
| 975 | DEFUN ("point-min", Fpoint_min, Spoint_min, 0, 0, 0, |
| 976 | doc: /* Return the minimum permissible value of point in the current buffer. |
| 977 | This is 1, unless narrowing (a buffer restriction) is in effect. */) |
| 978 | (void) |
| 979 | { |
| 980 | Lisp_Object temp; |
| 981 | XSETFASTINT (temp, BEGV); |
| 982 | return temp; |
| 983 | } |
| 984 | |
| 985 | DEFUN ("point-min-marker", Fpoint_min_marker, Spoint_min_marker, 0, 0, 0, |
| 986 | doc: /* Return a marker to the minimum permissible value of point in this buffer. |
| 987 | This is the beginning, unless narrowing (a buffer restriction) is in effect. */) |
| 988 | (void) |
| 989 | { |
| 990 | return build_marker (current_buffer, BEGV, BEGV_BYTE); |
| 991 | } |
| 992 | |
| 993 | DEFUN ("point-max", Fpoint_max, Spoint_max, 0, 0, 0, |
| 994 | doc: /* Return the maximum permissible value of point in the current buffer. |
| 995 | This is (1+ (buffer-size)), unless narrowing (a buffer restriction) |
| 996 | is in effect, in which case it is less. */) |
| 997 | (void) |
| 998 | { |
| 999 | Lisp_Object temp; |
| 1000 | XSETFASTINT (temp, ZV); |
| 1001 | return temp; |
| 1002 | } |
| 1003 | |
| 1004 | DEFUN ("point-max-marker", Fpoint_max_marker, Spoint_max_marker, 0, 0, 0, |
| 1005 | doc: /* Return a marker to the maximum permissible value of point in this buffer. |
| 1006 | This is (1+ (buffer-size)), unless narrowing (a buffer restriction) |
| 1007 | is in effect, in which case it is less. */) |
| 1008 | (void) |
| 1009 | { |
| 1010 | return build_marker (current_buffer, ZV, ZV_BYTE); |
| 1011 | } |
| 1012 | |
| 1013 | DEFUN ("gap-position", Fgap_position, Sgap_position, 0, 0, 0, |
| 1014 | doc: /* Return the position of the gap, in the current buffer. |
| 1015 | See also `gap-size'. */) |
| 1016 | (void) |
| 1017 | { |
| 1018 | Lisp_Object temp; |
| 1019 | XSETFASTINT (temp, GPT); |
| 1020 | return temp; |
| 1021 | } |
| 1022 | |
| 1023 | DEFUN ("gap-size", Fgap_size, Sgap_size, 0, 0, 0, |
| 1024 | doc: /* Return the size of the current buffer's gap. |
| 1025 | See also `gap-position'. */) |
| 1026 | (void) |
| 1027 | { |
| 1028 | Lisp_Object temp; |
| 1029 | XSETFASTINT (temp, GAP_SIZE); |
| 1030 | return temp; |
| 1031 | } |
| 1032 | |
| 1033 | DEFUN ("position-bytes", Fposition_bytes, Sposition_bytes, 1, 1, 0, |
| 1034 | doc: /* Return the byte position for character position POSITION. |
| 1035 | If POSITION is out of range, the value is nil. */) |
| 1036 | (Lisp_Object position) |
| 1037 | { |
| 1038 | CHECK_NUMBER_COERCE_MARKER (position); |
| 1039 | if (XINT (position) < BEG || XINT (position) > Z) |
| 1040 | return Qnil; |
| 1041 | return make_number (CHAR_TO_BYTE (XINT (position))); |
| 1042 | } |
| 1043 | |
| 1044 | DEFUN ("byte-to-position", Fbyte_to_position, Sbyte_to_position, 1, 1, 0, |
| 1045 | doc: /* Return the character position for byte position BYTEPOS. |
| 1046 | If BYTEPOS is out of range, the value is nil. */) |
| 1047 | (Lisp_Object bytepos) |
| 1048 | { |
| 1049 | CHECK_NUMBER (bytepos); |
| 1050 | if (XINT (bytepos) < BEG_BYTE || XINT (bytepos) > Z_BYTE) |
| 1051 | return Qnil; |
| 1052 | return make_number (BYTE_TO_CHAR (XINT (bytepos))); |
| 1053 | } |
| 1054 | \f |
| 1055 | DEFUN ("following-char", Ffollowing_char, Sfollowing_char, 0, 0, 0, |
| 1056 | doc: /* Return the character following point, as a number. |
| 1057 | At the end of the buffer or accessible region, return 0. */) |
| 1058 | (void) |
| 1059 | { |
| 1060 | Lisp_Object temp; |
| 1061 | if (PT >= ZV) |
| 1062 | XSETFASTINT (temp, 0); |
| 1063 | else |
| 1064 | XSETFASTINT (temp, FETCH_CHAR (PT_BYTE)); |
| 1065 | return temp; |
| 1066 | } |
| 1067 | |
| 1068 | DEFUN ("preceding-char", Fprevious_char, Sprevious_char, 0, 0, 0, |
| 1069 | doc: /* Return the character preceding point, as a number. |
| 1070 | At the beginning of the buffer or accessible region, return 0. */) |
| 1071 | (void) |
| 1072 | { |
| 1073 | Lisp_Object temp; |
| 1074 | if (PT <= BEGV) |
| 1075 | XSETFASTINT (temp, 0); |
| 1076 | else if (!NILP (BVAR (current_buffer, enable_multibyte_characters))) |
| 1077 | { |
| 1078 | ptrdiff_t pos = PT_BYTE; |
| 1079 | DEC_POS (pos); |
| 1080 | XSETFASTINT (temp, FETCH_CHAR (pos)); |
| 1081 | } |
| 1082 | else |
| 1083 | XSETFASTINT (temp, FETCH_BYTE (PT_BYTE - 1)); |
| 1084 | return temp; |
| 1085 | } |
| 1086 | |
| 1087 | DEFUN ("bobp", Fbobp, Sbobp, 0, 0, 0, |
| 1088 | doc: /* Return t if point is at the beginning of the buffer. |
| 1089 | If the buffer is narrowed, this means the beginning of the narrowed part. */) |
| 1090 | (void) |
| 1091 | { |
| 1092 | if (PT == BEGV) |
| 1093 | return Qt; |
| 1094 | return Qnil; |
| 1095 | } |
| 1096 | |
| 1097 | DEFUN ("eobp", Feobp, Seobp, 0, 0, 0, |
| 1098 | doc: /* Return t if point is at the end of the buffer. |
| 1099 | If the buffer is narrowed, this means the end of the narrowed part. */) |
| 1100 | (void) |
| 1101 | { |
| 1102 | if (PT == ZV) |
| 1103 | return Qt; |
| 1104 | return Qnil; |
| 1105 | } |
| 1106 | |
| 1107 | DEFUN ("bolp", Fbolp, Sbolp, 0, 0, 0, |
| 1108 | doc: /* Return t if point is at the beginning of a line. */) |
| 1109 | (void) |
| 1110 | { |
| 1111 | if (PT == BEGV || FETCH_BYTE (PT_BYTE - 1) == '\n') |
| 1112 | return Qt; |
| 1113 | return Qnil; |
| 1114 | } |
| 1115 | |
| 1116 | DEFUN ("eolp", Feolp, Seolp, 0, 0, 0, |
| 1117 | doc: /* Return t if point is at the end of a line. |
| 1118 | `End of a line' includes point being at the end of the buffer. */) |
| 1119 | (void) |
| 1120 | { |
| 1121 | if (PT == ZV || FETCH_BYTE (PT_BYTE) == '\n') |
| 1122 | return Qt; |
| 1123 | return Qnil; |
| 1124 | } |
| 1125 | |
| 1126 | DEFUN ("char-after", Fchar_after, Schar_after, 0, 1, 0, |
| 1127 | doc: /* Return character in current buffer at position POS. |
| 1128 | POS is an integer or a marker and defaults to point. |
| 1129 | If POS is out of range, the value is nil. */) |
| 1130 | (Lisp_Object pos) |
| 1131 | { |
| 1132 | register ptrdiff_t pos_byte; |
| 1133 | |
| 1134 | if (NILP (pos)) |
| 1135 | { |
| 1136 | pos_byte = PT_BYTE; |
| 1137 | XSETFASTINT (pos, PT); |
| 1138 | } |
| 1139 | |
| 1140 | if (MARKERP (pos)) |
| 1141 | { |
| 1142 | pos_byte = marker_byte_position (pos); |
| 1143 | if (pos_byte < BEGV_BYTE || pos_byte >= ZV_BYTE) |
| 1144 | return Qnil; |
| 1145 | } |
| 1146 | else |
| 1147 | { |
| 1148 | CHECK_NUMBER_COERCE_MARKER (pos); |
| 1149 | if (XINT (pos) < BEGV || XINT (pos) >= ZV) |
| 1150 | return Qnil; |
| 1151 | |
| 1152 | pos_byte = CHAR_TO_BYTE (XINT (pos)); |
| 1153 | } |
| 1154 | |
| 1155 | return make_number (FETCH_CHAR (pos_byte)); |
| 1156 | } |
| 1157 | |
| 1158 | DEFUN ("char-before", Fchar_before, Schar_before, 0, 1, 0, |
| 1159 | doc: /* Return character in current buffer preceding position POS. |
| 1160 | POS is an integer or a marker and defaults to point. |
| 1161 | If POS is out of range, the value is nil. */) |
| 1162 | (Lisp_Object pos) |
| 1163 | { |
| 1164 | register Lisp_Object val; |
| 1165 | register ptrdiff_t pos_byte; |
| 1166 | |
| 1167 | if (NILP (pos)) |
| 1168 | { |
| 1169 | pos_byte = PT_BYTE; |
| 1170 | XSETFASTINT (pos, PT); |
| 1171 | } |
| 1172 | |
| 1173 | if (MARKERP (pos)) |
| 1174 | { |
| 1175 | pos_byte = marker_byte_position (pos); |
| 1176 | |
| 1177 | if (pos_byte <= BEGV_BYTE || pos_byte > ZV_BYTE) |
| 1178 | return Qnil; |
| 1179 | } |
| 1180 | else |
| 1181 | { |
| 1182 | CHECK_NUMBER_COERCE_MARKER (pos); |
| 1183 | |
| 1184 | if (XINT (pos) <= BEGV || XINT (pos) > ZV) |
| 1185 | return Qnil; |
| 1186 | |
| 1187 | pos_byte = CHAR_TO_BYTE (XINT (pos)); |
| 1188 | } |
| 1189 | |
| 1190 | if (!NILP (BVAR (current_buffer, enable_multibyte_characters))) |
| 1191 | { |
| 1192 | DEC_POS (pos_byte); |
| 1193 | XSETFASTINT (val, FETCH_CHAR (pos_byte)); |
| 1194 | } |
| 1195 | else |
| 1196 | { |
| 1197 | pos_byte--; |
| 1198 | XSETFASTINT (val, FETCH_BYTE (pos_byte)); |
| 1199 | } |
| 1200 | return val; |
| 1201 | } |
| 1202 | \f |
| 1203 | DEFUN ("user-login-name", Fuser_login_name, Suser_login_name, 0, 1, 0, |
| 1204 | doc: /* Return the name under which the user logged in, as a string. |
| 1205 | This is based on the effective uid, not the real uid. |
| 1206 | Also, if the environment variables LOGNAME or USER are set, |
| 1207 | that determines the value of this function. |
| 1208 | |
| 1209 | If optional argument UID is an integer or a float, return the login name |
| 1210 | of the user with that uid, or nil if there is no such user. */) |
| 1211 | (Lisp_Object uid) |
| 1212 | { |
| 1213 | struct passwd *pw; |
| 1214 | uid_t id; |
| 1215 | |
| 1216 | /* Set up the user name info if we didn't do it before. |
| 1217 | (That can happen if Emacs is dumpable |
| 1218 | but you decide to run `temacs -l loadup' and not dump. */ |
| 1219 | if (INTEGERP (Vuser_login_name)) |
| 1220 | init_editfns (); |
| 1221 | |
| 1222 | if (NILP (uid)) |
| 1223 | return Vuser_login_name; |
| 1224 | |
| 1225 | CONS_TO_INTEGER (uid, uid_t, id); |
| 1226 | block_input (); |
| 1227 | pw = getpwuid (id); |
| 1228 | unblock_input (); |
| 1229 | return (pw ? build_string (pw->pw_name) : Qnil); |
| 1230 | } |
| 1231 | |
| 1232 | DEFUN ("user-real-login-name", Fuser_real_login_name, Suser_real_login_name, |
| 1233 | 0, 0, 0, |
| 1234 | doc: /* Return the name of the user's real uid, as a string. |
| 1235 | This ignores the environment variables LOGNAME and USER, so it differs from |
| 1236 | `user-login-name' when running under `su'. */) |
| 1237 | (void) |
| 1238 | { |
| 1239 | /* Set up the user name info if we didn't do it before. |
| 1240 | (That can happen if Emacs is dumpable |
| 1241 | but you decide to run `temacs -l loadup' and not dump. */ |
| 1242 | if (INTEGERP (Vuser_login_name)) |
| 1243 | init_editfns (); |
| 1244 | return Vuser_real_login_name; |
| 1245 | } |
| 1246 | |
| 1247 | DEFUN ("user-uid", Fuser_uid, Suser_uid, 0, 0, 0, |
| 1248 | doc: /* Return the effective uid of Emacs. |
| 1249 | Value is an integer or a float, depending on the value. */) |
| 1250 | (void) |
| 1251 | { |
| 1252 | uid_t euid = geteuid (); |
| 1253 | return make_fixnum_or_float (euid); |
| 1254 | } |
| 1255 | |
| 1256 | DEFUN ("user-real-uid", Fuser_real_uid, Suser_real_uid, 0, 0, 0, |
| 1257 | doc: /* Return the real uid of Emacs. |
| 1258 | Value is an integer or a float, depending on the value. */) |
| 1259 | (void) |
| 1260 | { |
| 1261 | uid_t uid = getuid (); |
| 1262 | return make_fixnum_or_float (uid); |
| 1263 | } |
| 1264 | |
| 1265 | DEFUN ("group-gid", Fgroup_gid, Sgroup_gid, 0, 0, 0, |
| 1266 | doc: /* Return the effective gid of Emacs. |
| 1267 | Value is an integer or a float, depending on the value. */) |
| 1268 | (void) |
| 1269 | { |
| 1270 | gid_t egid = getegid (); |
| 1271 | return make_fixnum_or_float (egid); |
| 1272 | } |
| 1273 | |
| 1274 | DEFUN ("group-real-gid", Fgroup_real_gid, Sgroup_real_gid, 0, 0, 0, |
| 1275 | doc: /* Return the real gid of Emacs. |
| 1276 | Value is an integer or a float, depending on the value. */) |
| 1277 | (void) |
| 1278 | { |
| 1279 | gid_t gid = getgid (); |
| 1280 | return make_fixnum_or_float (gid); |
| 1281 | } |
| 1282 | |
| 1283 | DEFUN ("user-full-name", Fuser_full_name, Suser_full_name, 0, 1, 0, |
| 1284 | doc: /* Return the full name of the user logged in, as a string. |
| 1285 | If the full name corresponding to Emacs's userid is not known, |
| 1286 | return "unknown". |
| 1287 | |
| 1288 | If optional argument UID is an integer or float, return the full name |
| 1289 | of the user with that uid, or nil if there is no such user. |
| 1290 | If UID is a string, return the full name of the user with that login |
| 1291 | name, or nil if there is no such user. */) |
| 1292 | (Lisp_Object uid) |
| 1293 | { |
| 1294 | struct passwd *pw; |
| 1295 | register char *p, *q; |
| 1296 | Lisp_Object full; |
| 1297 | |
| 1298 | if (NILP (uid)) |
| 1299 | return Vuser_full_name; |
| 1300 | else if (NUMBERP (uid)) |
| 1301 | { |
| 1302 | uid_t u; |
| 1303 | CONS_TO_INTEGER (uid, uid_t, u); |
| 1304 | block_input (); |
| 1305 | pw = getpwuid (u); |
| 1306 | unblock_input (); |
| 1307 | } |
| 1308 | else if (STRINGP (uid)) |
| 1309 | { |
| 1310 | block_input (); |
| 1311 | pw = getpwnam (SSDATA (uid)); |
| 1312 | unblock_input (); |
| 1313 | } |
| 1314 | else |
| 1315 | error ("Invalid UID specification"); |
| 1316 | |
| 1317 | if (!pw) |
| 1318 | return Qnil; |
| 1319 | |
| 1320 | p = USER_FULL_NAME; |
| 1321 | /* Chop off everything after the first comma. */ |
| 1322 | q = strchr (p, ','); |
| 1323 | full = make_string (p, q ? q - p : strlen (p)); |
| 1324 | |
| 1325 | #ifdef AMPERSAND_FULL_NAME |
| 1326 | p = SSDATA (full); |
| 1327 | q = strchr (p, '&'); |
| 1328 | /* Substitute the login name for the &, upcasing the first character. */ |
| 1329 | if (q) |
| 1330 | { |
| 1331 | register char *r; |
| 1332 | Lisp_Object login; |
| 1333 | |
| 1334 | login = Fuser_login_name (make_number (pw->pw_uid)); |
| 1335 | r = alloca (strlen (p) + SCHARS (login) + 1); |
| 1336 | memcpy (r, p, q - p); |
| 1337 | r[q - p] = 0; |
| 1338 | strcat (r, SSDATA (login)); |
| 1339 | r[q - p] = upcase ((unsigned char) r[q - p]); |
| 1340 | strcat (r, q + 1); |
| 1341 | full = build_string (r); |
| 1342 | } |
| 1343 | #endif /* AMPERSAND_FULL_NAME */ |
| 1344 | |
| 1345 | return full; |
| 1346 | } |
| 1347 | |
| 1348 | DEFUN ("system-name", Fsystem_name, Ssystem_name, 0, 0, 0, |
| 1349 | doc: /* Return the host name of the machine you are running on, as a string. */) |
| 1350 | (void) |
| 1351 | { |
| 1352 | return Vsystem_name; |
| 1353 | } |
| 1354 | |
| 1355 | DEFUN ("emacs-pid", Femacs_pid, Semacs_pid, 0, 0, 0, |
| 1356 | doc: /* Return the process ID of Emacs, as a number. */) |
| 1357 | (void) |
| 1358 | { |
| 1359 | pid_t pid = getpid (); |
| 1360 | return make_fixnum_or_float (pid); |
| 1361 | } |
| 1362 | |
| 1363 | \f |
| 1364 | |
| 1365 | #ifndef TIME_T_MIN |
| 1366 | # define TIME_T_MIN TYPE_MINIMUM (time_t) |
| 1367 | #endif |
| 1368 | #ifndef TIME_T_MAX |
| 1369 | # define TIME_T_MAX TYPE_MAXIMUM (time_t) |
| 1370 | #endif |
| 1371 | |
| 1372 | /* Report that a time value is out of range for Emacs. */ |
| 1373 | void |
| 1374 | time_overflow (void) |
| 1375 | { |
| 1376 | error ("Specified time is not representable"); |
| 1377 | } |
| 1378 | |
| 1379 | /* Return the upper part of the time T (everything but the bottom 16 bits). */ |
| 1380 | static EMACS_INT |
| 1381 | hi_time (time_t t) |
| 1382 | { |
| 1383 | time_t hi = t >> 16; |
| 1384 | |
| 1385 | /* Check for overflow, helping the compiler for common cases where |
| 1386 | no runtime check is needed, and taking care not to convert |
| 1387 | negative numbers to unsigned before comparing them. */ |
| 1388 | if (! ((! TYPE_SIGNED (time_t) |
| 1389 | || MOST_NEGATIVE_FIXNUM <= TIME_T_MIN >> 16 |
| 1390 | || MOST_NEGATIVE_FIXNUM <= hi) |
| 1391 | && (TIME_T_MAX >> 16 <= MOST_POSITIVE_FIXNUM |
| 1392 | || hi <= MOST_POSITIVE_FIXNUM))) |
| 1393 | time_overflow (); |
| 1394 | |
| 1395 | return hi; |
| 1396 | } |
| 1397 | |
| 1398 | /* Return the bottom 16 bits of the time T. */ |
| 1399 | static int |
| 1400 | lo_time (time_t t) |
| 1401 | { |
| 1402 | return t & ((1 << 16) - 1); |
| 1403 | } |
| 1404 | |
| 1405 | DEFUN ("current-time", Fcurrent_time, Scurrent_time, 0, 0, 0, |
| 1406 | doc: /* Return the current time, as the number of seconds since 1970-01-01 00:00:00. |
| 1407 | The time is returned as a list of integers (HIGH LOW USEC PSEC). |
| 1408 | HIGH has the most significant bits of the seconds, while LOW has the |
| 1409 | least significant 16 bits. USEC and PSEC are the microsecond and |
| 1410 | picosecond counts. */) |
| 1411 | (void) |
| 1412 | { |
| 1413 | return make_lisp_time (current_timespec ()); |
| 1414 | } |
| 1415 | |
| 1416 | DEFUN ("get-internal-run-time", Fget_internal_run_time, Sget_internal_run_time, |
| 1417 | 0, 0, 0, |
| 1418 | doc: /* Return the current run time used by Emacs. |
| 1419 | The time is returned as a list (HIGH LOW USEC PSEC), using the same |
| 1420 | style as (current-time). |
| 1421 | |
| 1422 | On systems that can't determine the run time, `get-internal-run-time' |
| 1423 | does the same thing as `current-time'. */) |
| 1424 | (void) |
| 1425 | { |
| 1426 | #ifdef HAVE_GETRUSAGE |
| 1427 | struct rusage usage; |
| 1428 | time_t secs; |
| 1429 | int usecs; |
| 1430 | |
| 1431 | if (getrusage (RUSAGE_SELF, &usage) < 0) |
| 1432 | /* This shouldn't happen. What action is appropriate? */ |
| 1433 | xsignal0 (Qerror); |
| 1434 | |
| 1435 | /* Sum up user time and system time. */ |
| 1436 | secs = usage.ru_utime.tv_sec + usage.ru_stime.tv_sec; |
| 1437 | usecs = usage.ru_utime.tv_usec + usage.ru_stime.tv_usec; |
| 1438 | if (usecs >= 1000000) |
| 1439 | { |
| 1440 | usecs -= 1000000; |
| 1441 | secs++; |
| 1442 | } |
| 1443 | return make_lisp_time (make_timespec (secs, usecs * 1000)); |
| 1444 | #else /* ! HAVE_GETRUSAGE */ |
| 1445 | #ifdef WINDOWSNT |
| 1446 | return w32_get_internal_run_time (); |
| 1447 | #else /* ! WINDOWSNT */ |
| 1448 | return Fcurrent_time (); |
| 1449 | #endif /* WINDOWSNT */ |
| 1450 | #endif /* HAVE_GETRUSAGE */ |
| 1451 | } |
| 1452 | \f |
| 1453 | |
| 1454 | /* Make a Lisp list that represents the time T with fraction TAIL. */ |
| 1455 | static Lisp_Object |
| 1456 | make_time_tail (time_t t, Lisp_Object tail) |
| 1457 | { |
| 1458 | return Fcons (make_number (hi_time (t)), |
| 1459 | Fcons (make_number (lo_time (t)), tail)); |
| 1460 | } |
| 1461 | |
| 1462 | /* Make a Lisp list that represents the system time T. */ |
| 1463 | static Lisp_Object |
| 1464 | make_time (time_t t) |
| 1465 | { |
| 1466 | return make_time_tail (t, Qnil); |
| 1467 | } |
| 1468 | |
| 1469 | /* Make a Lisp list that represents the Emacs time T. T may be an |
| 1470 | invalid time, with a slightly negative tv_nsec value such as |
| 1471 | UNKNOWN_MODTIME_NSECS; in that case, the Lisp list contains a |
| 1472 | correspondingly negative picosecond count. */ |
| 1473 | Lisp_Object |
| 1474 | make_lisp_time (struct timespec t) |
| 1475 | { |
| 1476 | int ns = t.tv_nsec; |
| 1477 | return make_time_tail (t.tv_sec, list2i (ns / 1000, ns % 1000 * 1000)); |
| 1478 | } |
| 1479 | |
| 1480 | /* Decode a Lisp list SPECIFIED_TIME that represents a time. |
| 1481 | Set *PHIGH, *PLOW, *PUSEC, *PPSEC to its parts; do not check their values. |
| 1482 | Return true if successful. */ |
| 1483 | static bool |
| 1484 | disassemble_lisp_time (Lisp_Object specified_time, Lisp_Object *phigh, |
| 1485 | Lisp_Object *plow, Lisp_Object *pusec, |
| 1486 | Lisp_Object *ppsec) |
| 1487 | { |
| 1488 | if (CONSP (specified_time)) |
| 1489 | { |
| 1490 | Lisp_Object low = XCDR (specified_time); |
| 1491 | Lisp_Object usec = make_number (0); |
| 1492 | Lisp_Object psec = make_number (0); |
| 1493 | if (CONSP (low)) |
| 1494 | { |
| 1495 | Lisp_Object low_tail = XCDR (low); |
| 1496 | low = XCAR (low); |
| 1497 | if (CONSP (low_tail)) |
| 1498 | { |
| 1499 | usec = XCAR (low_tail); |
| 1500 | low_tail = XCDR (low_tail); |
| 1501 | if (CONSP (low_tail)) |
| 1502 | psec = XCAR (low_tail); |
| 1503 | } |
| 1504 | else if (!NILP (low_tail)) |
| 1505 | usec = low_tail; |
| 1506 | } |
| 1507 | |
| 1508 | *phigh = XCAR (specified_time); |
| 1509 | *plow = low; |
| 1510 | *pusec = usec; |
| 1511 | *ppsec = psec; |
| 1512 | return 1; |
| 1513 | } |
| 1514 | |
| 1515 | return 0; |
| 1516 | } |
| 1517 | |
| 1518 | /* From the time components HIGH, LOW, USEC and PSEC taken from a Lisp |
| 1519 | list, generate the corresponding time value. |
| 1520 | |
| 1521 | If RESULT is not null, store into *RESULT the converted time; |
| 1522 | this can fail if the converted time does not fit into struct timespec. |
| 1523 | If *DRESULT is not null, store into *DRESULT the number of |
| 1524 | seconds since the start of the POSIX Epoch. |
| 1525 | |
| 1526 | Return true if successful. */ |
| 1527 | bool |
| 1528 | decode_time_components (Lisp_Object high, Lisp_Object low, Lisp_Object usec, |
| 1529 | Lisp_Object psec, |
| 1530 | struct timespec *result, double *dresult) |
| 1531 | { |
| 1532 | EMACS_INT hi, lo, us, ps; |
| 1533 | if (! (INTEGERP (high) && INTEGERP (low) |
| 1534 | && INTEGERP (usec) && INTEGERP (psec))) |
| 1535 | return 0; |
| 1536 | hi = XINT (high); |
| 1537 | lo = XINT (low); |
| 1538 | us = XINT (usec); |
| 1539 | ps = XINT (psec); |
| 1540 | |
| 1541 | /* Normalize out-of-range lower-order components by carrying |
| 1542 | each overflow into the next higher-order component. */ |
| 1543 | us += ps / 1000000 - (ps % 1000000 < 0); |
| 1544 | lo += us / 1000000 - (us % 1000000 < 0); |
| 1545 | hi += lo >> 16; |
| 1546 | ps = ps % 1000000 + 1000000 * (ps % 1000000 < 0); |
| 1547 | us = us % 1000000 + 1000000 * (us % 1000000 < 0); |
| 1548 | lo &= (1 << 16) - 1; |
| 1549 | |
| 1550 | if (result) |
| 1551 | { |
| 1552 | if ((TYPE_SIGNED (time_t) ? TIME_T_MIN >> 16 <= hi : 0 <= hi) |
| 1553 | && hi <= TIME_T_MAX >> 16) |
| 1554 | { |
| 1555 | /* Return the greatest representable time that is not greater |
| 1556 | than the requested time. */ |
| 1557 | time_t sec = hi; |
| 1558 | *result = make_timespec ((sec << 16) + lo, us * 1000 + ps / 1000); |
| 1559 | } |
| 1560 | else |
| 1561 | { |
| 1562 | /* Overflow in the highest-order component. */ |
| 1563 | return 0; |
| 1564 | } |
| 1565 | } |
| 1566 | |
| 1567 | if (dresult) |
| 1568 | *dresult = (us * 1e6 + ps) / 1e12 + lo + hi * 65536.0; |
| 1569 | |
| 1570 | return 1; |
| 1571 | } |
| 1572 | |
| 1573 | /* Decode a Lisp list SPECIFIED_TIME that represents a time. |
| 1574 | If SPECIFIED_TIME is nil, use the current time. |
| 1575 | |
| 1576 | Round the time down to the nearest struct timespec value. |
| 1577 | Return seconds since the Epoch. |
| 1578 | Signal an error if unsuccessful. */ |
| 1579 | struct timespec |
| 1580 | lisp_time_argument (Lisp_Object specified_time) |
| 1581 | { |
| 1582 | struct timespec t; |
| 1583 | if (NILP (specified_time)) |
| 1584 | t = current_timespec (); |
| 1585 | else |
| 1586 | { |
| 1587 | Lisp_Object high, low, usec, psec; |
| 1588 | if (! (disassemble_lisp_time (specified_time, &high, &low, &usec, &psec) |
| 1589 | && decode_time_components (high, low, usec, psec, &t, 0))) |
| 1590 | error ("Invalid time specification"); |
| 1591 | } |
| 1592 | return t; |
| 1593 | } |
| 1594 | |
| 1595 | /* Like lisp_time_argument, except decode only the seconds part, |
| 1596 | do not allow out-of-range time stamps, do not check the subseconds part, |
| 1597 | and always round down. */ |
| 1598 | static time_t |
| 1599 | lisp_seconds_argument (Lisp_Object specified_time) |
| 1600 | { |
| 1601 | if (NILP (specified_time)) |
| 1602 | return time (NULL); |
| 1603 | else |
| 1604 | { |
| 1605 | Lisp_Object high, low, usec, psec; |
| 1606 | struct timespec t; |
| 1607 | if (! (disassemble_lisp_time (specified_time, &high, &low, &usec, &psec) |
| 1608 | && decode_time_components (high, low, make_number (0), |
| 1609 | make_number (0), &t, 0))) |
| 1610 | error ("Invalid time specification"); |
| 1611 | return t.tv_sec; |
| 1612 | } |
| 1613 | } |
| 1614 | |
| 1615 | DEFUN ("float-time", Ffloat_time, Sfloat_time, 0, 1, 0, |
| 1616 | doc: /* Return the current time, as a float number of seconds since the epoch. |
| 1617 | If SPECIFIED-TIME is given, it is the time to convert to float |
| 1618 | instead of the current time. The argument should have the form |
| 1619 | (HIGH LOW) or (HIGH LOW USEC) or (HIGH LOW USEC PSEC). Thus, |
| 1620 | you can use times from `current-time' and from `file-attributes'. |
| 1621 | SPECIFIED-TIME can also have the form (HIGH . LOW), but this is |
| 1622 | considered obsolete. |
| 1623 | |
| 1624 | WARNING: Since the result is floating point, it may not be exact. |
| 1625 | If precise time stamps are required, use either `current-time', |
| 1626 | or (if you need time as a string) `format-time-string'. */) |
| 1627 | (Lisp_Object specified_time) |
| 1628 | { |
| 1629 | double t; |
| 1630 | if (NILP (specified_time)) |
| 1631 | { |
| 1632 | struct timespec now = current_timespec (); |
| 1633 | t = now.tv_sec + now.tv_nsec / 1e9; |
| 1634 | } |
| 1635 | else |
| 1636 | { |
| 1637 | Lisp_Object high, low, usec, psec; |
| 1638 | if (! (disassemble_lisp_time (specified_time, &high, &low, &usec, &psec) |
| 1639 | && decode_time_components (high, low, usec, psec, 0, &t))) |
| 1640 | error ("Invalid time specification"); |
| 1641 | } |
| 1642 | return make_float (t); |
| 1643 | } |
| 1644 | |
| 1645 | /* Write information into buffer S of size MAXSIZE, according to the |
| 1646 | FORMAT of length FORMAT_LEN, using time information taken from *TP. |
| 1647 | Default to Universal Time if UT, local time otherwise. |
| 1648 | Use NS as the number of nanoseconds in the %N directive. |
| 1649 | Return the number of bytes written, not including the terminating |
| 1650 | '\0'. If S is NULL, nothing will be written anywhere; so to |
| 1651 | determine how many bytes would be written, use NULL for S and |
| 1652 | ((size_t) -1) for MAXSIZE. |
| 1653 | |
| 1654 | This function behaves like nstrftime, except it allows null |
| 1655 | bytes in FORMAT and it does not support nanoseconds. */ |
| 1656 | static size_t |
| 1657 | emacs_nmemftime (char *s, size_t maxsize, const char *format, |
| 1658 | size_t format_len, const struct tm *tp, bool ut, int ns) |
| 1659 | { |
| 1660 | size_t total = 0; |
| 1661 | |
| 1662 | /* Loop through all the null-terminated strings in the format |
| 1663 | argument. Normally there's just one null-terminated string, but |
| 1664 | there can be arbitrarily many, concatenated together, if the |
| 1665 | format contains '\0' bytes. nstrftime stops at the first |
| 1666 | '\0' byte so we must invoke it separately for each such string. */ |
| 1667 | for (;;) |
| 1668 | { |
| 1669 | size_t len; |
| 1670 | size_t result; |
| 1671 | |
| 1672 | if (s) |
| 1673 | s[0] = '\1'; |
| 1674 | |
| 1675 | result = nstrftime (s, maxsize, format, tp, ut, ns); |
| 1676 | |
| 1677 | if (s) |
| 1678 | { |
| 1679 | if (result == 0 && s[0] != '\0') |
| 1680 | return 0; |
| 1681 | s += result + 1; |
| 1682 | } |
| 1683 | |
| 1684 | maxsize -= result + 1; |
| 1685 | total += result; |
| 1686 | len = strlen (format); |
| 1687 | if (len == format_len) |
| 1688 | return total; |
| 1689 | total++; |
| 1690 | format += len + 1; |
| 1691 | format_len -= len + 1; |
| 1692 | } |
| 1693 | } |
| 1694 | |
| 1695 | DEFUN ("format-time-string", Fformat_time_string, Sformat_time_string, 1, 3, 0, |
| 1696 | doc: /* Use FORMAT-STRING to format the time TIME, or now if omitted. |
| 1697 | TIME is specified as (HIGH LOW USEC PSEC), as returned by |
| 1698 | `current-time' or `file-attributes'. The obsolete form (HIGH . LOW) |
| 1699 | is also still accepted. |
| 1700 | The third, optional, argument UNIVERSAL, if non-nil, means describe TIME |
| 1701 | as Universal Time; nil means describe TIME in the local time zone. |
| 1702 | The value is a copy of FORMAT-STRING, but with certain constructs replaced |
| 1703 | by text that describes the specified date and time in TIME: |
| 1704 | |
| 1705 | %Y is the year, %y within the century, %C the century. |
| 1706 | %G is the year corresponding to the ISO week, %g within the century. |
| 1707 | %m is the numeric month. |
| 1708 | %b and %h are the locale's abbreviated month name, %B the full name. |
| 1709 | (%h is not supported on MS-Windows.) |
| 1710 | %d is the day of the month, zero-padded, %e is blank-padded. |
| 1711 | %u is the numeric day of week from 1 (Monday) to 7, %w from 0 (Sunday) to 6. |
| 1712 | %a is the locale's abbreviated name of the day of week, %A the full name. |
| 1713 | %U is the week number starting on Sunday, %W starting on Monday, |
| 1714 | %V according to ISO 8601. |
| 1715 | %j is the day of the year. |
| 1716 | |
| 1717 | %H is the hour on a 24-hour clock, %I is on a 12-hour clock, %k is like %H |
| 1718 | only blank-padded, %l is like %I blank-padded. |
| 1719 | %p is the locale's equivalent of either AM or PM. |
| 1720 | %M is the minute. |
| 1721 | %S is the second. |
| 1722 | %N is the nanosecond, %6N the microsecond, %3N the millisecond, etc. |
| 1723 | %Z is the time zone name, %z is the numeric form. |
| 1724 | %s is the number of seconds since 1970-01-01 00:00:00 +0000. |
| 1725 | |
| 1726 | %c is the locale's date and time format. |
| 1727 | %x is the locale's "preferred" date format. |
| 1728 | %D is like "%m/%d/%y". |
| 1729 | %F is the ISO 8601 date format (like "%Y-%m-%d"). |
| 1730 | |
| 1731 | %R is like "%H:%M", %T is like "%H:%M:%S", %r is like "%I:%M:%S %p". |
| 1732 | %X is the locale's "preferred" time format. |
| 1733 | |
| 1734 | Finally, %n is a newline, %t is a tab, %% is a literal %. |
| 1735 | |
| 1736 | Certain flags and modifiers are available with some format controls. |
| 1737 | The flags are `_', `-', `^' and `#'. For certain characters X, |
| 1738 | %_X is like %X, but padded with blanks; %-X is like %X, |
| 1739 | but without padding. %^X is like %X, but with all textual |
| 1740 | characters up-cased; %#X is like %X, but with letter-case of |
| 1741 | all textual characters reversed. |
| 1742 | %NX (where N stands for an integer) is like %X, |
| 1743 | but takes up at least N (a number) positions. |
| 1744 | The modifiers are `E' and `O'. For certain characters X, |
| 1745 | %EX is a locale's alternative version of %X; |
| 1746 | %OX is like %X, but uses the locale's number symbols. |
| 1747 | |
| 1748 | For example, to produce full ISO 8601 format, use "%FT%T%z". |
| 1749 | |
| 1750 | usage: (format-time-string FORMAT-STRING &optional TIME UNIVERSAL) */) |
| 1751 | (Lisp_Object format_string, Lisp_Object timeval, Lisp_Object universal) |
| 1752 | { |
| 1753 | struct timespec t = lisp_time_argument (timeval); |
| 1754 | struct tm tm; |
| 1755 | |
| 1756 | CHECK_STRING (format_string); |
| 1757 | format_string = code_convert_string_norecord (format_string, |
| 1758 | Vlocale_coding_system, 1); |
| 1759 | return format_time_string (SSDATA (format_string), SBYTES (format_string), |
| 1760 | t, ! NILP (universal), &tm); |
| 1761 | } |
| 1762 | |
| 1763 | static Lisp_Object |
| 1764 | format_time_string (char const *format, ptrdiff_t formatlen, |
| 1765 | struct timespec t, bool ut, struct tm *tmp) |
| 1766 | { |
| 1767 | char buffer[4000]; |
| 1768 | char *buf = buffer; |
| 1769 | ptrdiff_t size = sizeof buffer; |
| 1770 | size_t len; |
| 1771 | Lisp_Object bufstring; |
| 1772 | int ns = t.tv_nsec; |
| 1773 | struct tm *tm; |
| 1774 | USE_SAFE_ALLOCA; |
| 1775 | |
| 1776 | while (1) |
| 1777 | { |
| 1778 | time_t *taddr = &t.tv_sec; |
| 1779 | block_input (); |
| 1780 | |
| 1781 | synchronize_system_time_locale (); |
| 1782 | |
| 1783 | tm = ut ? gmtime (taddr) : localtime (taddr); |
| 1784 | if (! tm) |
| 1785 | { |
| 1786 | unblock_input (); |
| 1787 | time_overflow (); |
| 1788 | } |
| 1789 | *tmp = *tm; |
| 1790 | |
| 1791 | buf[0] = '\1'; |
| 1792 | len = emacs_nmemftime (buf, size, format, formatlen, tm, ut, ns); |
| 1793 | if ((0 < len && len < size) || (len == 0 && buf[0] == '\0')) |
| 1794 | break; |
| 1795 | |
| 1796 | /* Buffer was too small, so make it bigger and try again. */ |
| 1797 | len = emacs_nmemftime (NULL, SIZE_MAX, format, formatlen, tm, ut, ns); |
| 1798 | unblock_input (); |
| 1799 | if (STRING_BYTES_BOUND <= len) |
| 1800 | string_overflow (); |
| 1801 | size = len + 1; |
| 1802 | buf = SAFE_ALLOCA (size); |
| 1803 | } |
| 1804 | |
| 1805 | unblock_input (); |
| 1806 | bufstring = make_unibyte_string (buf, len); |
| 1807 | SAFE_FREE (); |
| 1808 | return code_convert_string_norecord (bufstring, Vlocale_coding_system, 0); |
| 1809 | } |
| 1810 | |
| 1811 | DEFUN ("decode-time", Fdecode_time, Sdecode_time, 0, 1, 0, |
| 1812 | doc: /* Decode a time value as (SEC MINUTE HOUR DAY MONTH YEAR DOW DST ZONE). |
| 1813 | The optional SPECIFIED-TIME should be a list of (HIGH LOW . IGNORED), |
| 1814 | as from `current-time' and `file-attributes', or nil to use the |
| 1815 | current time. The obsolete form (HIGH . LOW) is also still accepted. |
| 1816 | The list has the following nine members: SEC is an integer between 0 |
| 1817 | and 60; SEC is 60 for a leap second, which only some operating systems |
| 1818 | support. MINUTE is an integer between 0 and 59. HOUR is an integer |
| 1819 | between 0 and 23. DAY is an integer between 1 and 31. MONTH is an |
| 1820 | integer between 1 and 12. YEAR is an integer indicating the |
| 1821 | four-digit year. DOW is the day of week, an integer between 0 and 6, |
| 1822 | where 0 is Sunday. DST is t if daylight saving time is in effect, |
| 1823 | otherwise nil. ZONE is an integer indicating the number of seconds |
| 1824 | east of Greenwich. (Note that Common Lisp has different meanings for |
| 1825 | DOW and ZONE.) */) |
| 1826 | (Lisp_Object specified_time) |
| 1827 | { |
| 1828 | time_t time_spec = lisp_seconds_argument (specified_time); |
| 1829 | struct tm save_tm; |
| 1830 | struct tm *decoded_time; |
| 1831 | Lisp_Object list_args[9]; |
| 1832 | |
| 1833 | block_input (); |
| 1834 | decoded_time = localtime (&time_spec); |
| 1835 | if (decoded_time) |
| 1836 | save_tm = *decoded_time; |
| 1837 | unblock_input (); |
| 1838 | if (! (decoded_time |
| 1839 | && MOST_NEGATIVE_FIXNUM - TM_YEAR_BASE <= save_tm.tm_year |
| 1840 | && save_tm.tm_year <= MOST_POSITIVE_FIXNUM - TM_YEAR_BASE)) |
| 1841 | time_overflow (); |
| 1842 | XSETFASTINT (list_args[0], save_tm.tm_sec); |
| 1843 | XSETFASTINT (list_args[1], save_tm.tm_min); |
| 1844 | XSETFASTINT (list_args[2], save_tm.tm_hour); |
| 1845 | XSETFASTINT (list_args[3], save_tm.tm_mday); |
| 1846 | XSETFASTINT (list_args[4], save_tm.tm_mon + 1); |
| 1847 | /* On 64-bit machines an int is narrower than EMACS_INT, thus the |
| 1848 | cast below avoids overflow in int arithmetics. */ |
| 1849 | XSETINT (list_args[5], TM_YEAR_BASE + (EMACS_INT) save_tm.tm_year); |
| 1850 | XSETFASTINT (list_args[6], save_tm.tm_wday); |
| 1851 | list_args[7] = save_tm.tm_isdst ? Qt : Qnil; |
| 1852 | |
| 1853 | block_input (); |
| 1854 | decoded_time = gmtime (&time_spec); |
| 1855 | if (decoded_time == 0) |
| 1856 | list_args[8] = Qnil; |
| 1857 | else |
| 1858 | XSETINT (list_args[8], tm_diff (&save_tm, decoded_time)); |
| 1859 | unblock_input (); |
| 1860 | return Flist (9, list_args); |
| 1861 | } |
| 1862 | |
| 1863 | /* Return OBJ - OFFSET, checking that OBJ is a valid fixnum and that |
| 1864 | the result is representable as an int. Assume OFFSET is small and |
| 1865 | nonnegative. */ |
| 1866 | static int |
| 1867 | check_tm_member (Lisp_Object obj, int offset) |
| 1868 | { |
| 1869 | EMACS_INT n; |
| 1870 | CHECK_NUMBER (obj); |
| 1871 | n = XINT (obj); |
| 1872 | if (! (INT_MIN + offset <= n && n - offset <= INT_MAX)) |
| 1873 | time_overflow (); |
| 1874 | return n - offset; |
| 1875 | } |
| 1876 | |
| 1877 | DEFUN ("encode-time", Fencode_time, Sencode_time, 6, MANY, 0, |
| 1878 | doc: /* Convert SECOND, MINUTE, HOUR, DAY, MONTH, YEAR and ZONE to internal time. |
| 1879 | This is the reverse operation of `decode-time', which see. |
| 1880 | ZONE defaults to the current time zone rule. This can |
| 1881 | be a string or t (as from `set-time-zone-rule'), or it can be a list |
| 1882 | \(as from `current-time-zone') or an integer (as from `decode-time') |
| 1883 | applied without consideration for daylight saving time. |
| 1884 | |
| 1885 | You can pass more than 7 arguments; then the first six arguments |
| 1886 | are used as SECOND through YEAR, and the *last* argument is used as ZONE. |
| 1887 | The intervening arguments are ignored. |
| 1888 | This feature lets (apply 'encode-time (decode-time ...)) work. |
| 1889 | |
| 1890 | Out-of-range values for SECOND, MINUTE, HOUR, DAY, or MONTH are allowed; |
| 1891 | for example, a DAY of 0 means the day preceding the given month. |
| 1892 | Year numbers less than 100 are treated just like other year numbers. |
| 1893 | If you want them to stand for years in this century, you must do that yourself. |
| 1894 | |
| 1895 | Years before 1970 are not guaranteed to work. On some systems, |
| 1896 | year values as low as 1901 do work. |
| 1897 | |
| 1898 | usage: (encode-time SECOND MINUTE HOUR DAY MONTH YEAR &optional ZONE) */) |
| 1899 | (ptrdiff_t nargs, Lisp_Object *args) |
| 1900 | { |
| 1901 | time_t value; |
| 1902 | struct tm tm; |
| 1903 | Lisp_Object zone = (nargs > 6 ? args[nargs - 1] : Qnil); |
| 1904 | |
| 1905 | tm.tm_sec = check_tm_member (args[0], 0); |
| 1906 | tm.tm_min = check_tm_member (args[1], 0); |
| 1907 | tm.tm_hour = check_tm_member (args[2], 0); |
| 1908 | tm.tm_mday = check_tm_member (args[3], 0); |
| 1909 | tm.tm_mon = check_tm_member (args[4], 1); |
| 1910 | tm.tm_year = check_tm_member (args[5], TM_YEAR_BASE); |
| 1911 | tm.tm_isdst = -1; |
| 1912 | |
| 1913 | if (CONSP (zone)) |
| 1914 | zone = XCAR (zone); |
| 1915 | if (NILP (zone)) |
| 1916 | { |
| 1917 | block_input (); |
| 1918 | value = mktime (&tm); |
| 1919 | unblock_input (); |
| 1920 | } |
| 1921 | else |
| 1922 | { |
| 1923 | static char const tzbuf_format[] = "XXX%s%"pI"d:%02d:%02d"; |
| 1924 | char tzbuf[sizeof tzbuf_format + INT_STRLEN_BOUND (EMACS_INT)]; |
| 1925 | char *old_tzstring; |
| 1926 | const char *tzstring; |
| 1927 | USE_SAFE_ALLOCA; |
| 1928 | |
| 1929 | if (EQ (zone, Qt)) |
| 1930 | tzstring = "UTC0"; |
| 1931 | else if (STRINGP (zone)) |
| 1932 | tzstring = SSDATA (zone); |
| 1933 | else if (INTEGERP (zone)) |
| 1934 | { |
| 1935 | EMACS_INT abszone = eabs (XINT (zone)); |
| 1936 | EMACS_INT zone_hr = abszone / (60*60); |
| 1937 | int zone_min = (abszone/60) % 60; |
| 1938 | int zone_sec = abszone % 60; |
| 1939 | sprintf (tzbuf, tzbuf_format, &"-"[XINT (zone) < 0], |
| 1940 | zone_hr, zone_min, zone_sec); |
| 1941 | tzstring = tzbuf; |
| 1942 | } |
| 1943 | else |
| 1944 | error ("Invalid time zone specification"); |
| 1945 | |
| 1946 | old_tzstring = getenv ("TZ"); |
| 1947 | if (old_tzstring) |
| 1948 | { |
| 1949 | char *buf = SAFE_ALLOCA (strlen (old_tzstring) + 1); |
| 1950 | old_tzstring = strcpy (buf, old_tzstring); |
| 1951 | } |
| 1952 | |
| 1953 | block_input (); |
| 1954 | |
| 1955 | /* Set TZ before calling mktime; merely adjusting mktime's returned |
| 1956 | value doesn't suffice, since that would mishandle leap seconds. */ |
| 1957 | set_time_zone_rule (tzstring); |
| 1958 | |
| 1959 | value = mktime (&tm); |
| 1960 | |
| 1961 | set_time_zone_rule (old_tzstring); |
| 1962 | #ifdef LOCALTIME_CACHE |
| 1963 | tzset (); |
| 1964 | #endif |
| 1965 | unblock_input (); |
| 1966 | SAFE_FREE (); |
| 1967 | } |
| 1968 | |
| 1969 | if (value == (time_t) -1) |
| 1970 | time_overflow (); |
| 1971 | |
| 1972 | return make_time (value); |
| 1973 | } |
| 1974 | |
| 1975 | DEFUN ("current-time-string", Fcurrent_time_string, Scurrent_time_string, 0, 1, 0, |
| 1976 | doc: /* Return the current local time, as a human-readable string. |
| 1977 | Programs can use this function to decode a time, |
| 1978 | since the number of columns in each field is fixed |
| 1979 | if the year is in the range 1000-9999. |
| 1980 | The format is `Sun Sep 16 01:03:52 1973'. |
| 1981 | However, see also the functions `decode-time' and `format-time-string' |
| 1982 | which provide a much more powerful and general facility. |
| 1983 | |
| 1984 | If SPECIFIED-TIME is given, it is a time to format instead of the |
| 1985 | current time. The argument should have the form (HIGH LOW . IGNORED). |
| 1986 | Thus, you can use times obtained from `current-time' and from |
| 1987 | `file-attributes'. SPECIFIED-TIME can also have the form (HIGH . LOW), |
| 1988 | but this is considered obsolete. */) |
| 1989 | (Lisp_Object specified_time) |
| 1990 | { |
| 1991 | time_t value = lisp_seconds_argument (specified_time); |
| 1992 | struct tm *tm; |
| 1993 | char buf[sizeof "Mon Apr 30 12:49:17 " + INT_STRLEN_BOUND (int) + 1]; |
| 1994 | int len IF_LINT (= 0); |
| 1995 | |
| 1996 | /* Convert to a string in ctime format, except without the trailing |
| 1997 | newline, and without the 4-digit year limit. Don't use asctime |
| 1998 | or ctime, as they might dump core if the year is outside the |
| 1999 | range -999 .. 9999. */ |
| 2000 | block_input (); |
| 2001 | tm = localtime (&value); |
| 2002 | if (tm) |
| 2003 | { |
| 2004 | static char const wday_name[][4] = |
| 2005 | { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" }; |
| 2006 | static char const mon_name[][4] = |
| 2007 | { "Jan", "Feb", "Mar", "Apr", "May", "Jun", |
| 2008 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" }; |
| 2009 | printmax_t year_base = TM_YEAR_BASE; |
| 2010 | |
| 2011 | len = sprintf (buf, "%s %s%3d %02d:%02d:%02d %"pMd, |
| 2012 | wday_name[tm->tm_wday], mon_name[tm->tm_mon], tm->tm_mday, |
| 2013 | tm->tm_hour, tm->tm_min, tm->tm_sec, |
| 2014 | tm->tm_year + year_base); |
| 2015 | } |
| 2016 | unblock_input (); |
| 2017 | if (! tm) |
| 2018 | time_overflow (); |
| 2019 | |
| 2020 | return make_unibyte_string (buf, len); |
| 2021 | } |
| 2022 | |
| 2023 | /* Yield A - B, measured in seconds. |
| 2024 | This function is copied from the GNU C Library. */ |
| 2025 | static int |
| 2026 | tm_diff (struct tm *a, struct tm *b) |
| 2027 | { |
| 2028 | /* Compute intervening leap days correctly even if year is negative. |
| 2029 | Take care to avoid int overflow in leap day calculations, |
| 2030 | but it's OK to assume that A and B are close to each other. */ |
| 2031 | int a4 = (a->tm_year >> 2) + (TM_YEAR_BASE >> 2) - ! (a->tm_year & 3); |
| 2032 | int b4 = (b->tm_year >> 2) + (TM_YEAR_BASE >> 2) - ! (b->tm_year & 3); |
| 2033 | int a100 = a4 / 25 - (a4 % 25 < 0); |
| 2034 | int b100 = b4 / 25 - (b4 % 25 < 0); |
| 2035 | int a400 = a100 >> 2; |
| 2036 | int b400 = b100 >> 2; |
| 2037 | int intervening_leap_days = (a4 - b4) - (a100 - b100) + (a400 - b400); |
| 2038 | int years = a->tm_year - b->tm_year; |
| 2039 | int days = (365 * years + intervening_leap_days |
| 2040 | + (a->tm_yday - b->tm_yday)); |
| 2041 | return (60 * (60 * (24 * days + (a->tm_hour - b->tm_hour)) |
| 2042 | + (a->tm_min - b->tm_min)) |
| 2043 | + (a->tm_sec - b->tm_sec)); |
| 2044 | } |
| 2045 | |
| 2046 | DEFUN ("current-time-zone", Fcurrent_time_zone, Scurrent_time_zone, 0, 1, 0, |
| 2047 | doc: /* Return the offset and name for the local time zone. |
| 2048 | This returns a list of the form (OFFSET NAME). |
| 2049 | OFFSET is an integer number of seconds ahead of UTC (east of Greenwich). |
| 2050 | A negative value means west of Greenwich. |
| 2051 | NAME is a string giving the name of the time zone. |
| 2052 | If SPECIFIED-TIME is given, the time zone offset is determined from it |
| 2053 | instead of using the current time. The argument should have the form |
| 2054 | (HIGH LOW . IGNORED). Thus, you can use times obtained from |
| 2055 | `current-time' and from `file-attributes'. SPECIFIED-TIME can also |
| 2056 | have the form (HIGH . LOW), but this is considered obsolete. |
| 2057 | |
| 2058 | Some operating systems cannot provide all this information to Emacs; |
| 2059 | in this case, `current-time-zone' returns a list containing nil for |
| 2060 | the data it can't find. */) |
| 2061 | (Lisp_Object specified_time) |
| 2062 | { |
| 2063 | struct timespec value; |
| 2064 | int offset; |
| 2065 | struct tm *t; |
| 2066 | struct tm localtm; |
| 2067 | Lisp_Object zone_offset, zone_name; |
| 2068 | |
| 2069 | zone_offset = Qnil; |
| 2070 | value = make_timespec (lisp_seconds_argument (specified_time), 0); |
| 2071 | zone_name = format_time_string ("%Z", sizeof "%Z" - 1, value, 0, &localtm); |
| 2072 | block_input (); |
| 2073 | t = gmtime (&value.tv_sec); |
| 2074 | if (t) |
| 2075 | offset = tm_diff (&localtm, t); |
| 2076 | unblock_input (); |
| 2077 | |
| 2078 | if (t) |
| 2079 | { |
| 2080 | zone_offset = make_number (offset); |
| 2081 | if (SCHARS (zone_name) == 0) |
| 2082 | { |
| 2083 | /* No local time zone name is available; use "+-NNNN" instead. */ |
| 2084 | int m = offset / 60; |
| 2085 | int am = offset < 0 ? - m : m; |
| 2086 | char buf[sizeof "+00" + INT_STRLEN_BOUND (int)]; |
| 2087 | zone_name = make_formatted_string (buf, "%c%02d%02d", |
| 2088 | (offset < 0 ? '-' : '+'), |
| 2089 | am / 60, am % 60); |
| 2090 | } |
| 2091 | } |
| 2092 | |
| 2093 | return list2 (zone_offset, zone_name); |
| 2094 | } |
| 2095 | |
| 2096 | DEFUN ("set-time-zone-rule", Fset_time_zone_rule, Sset_time_zone_rule, 1, 1, 0, |
| 2097 | doc: /* Set the local time zone using TZ, a string specifying a time zone rule. |
| 2098 | If TZ is nil, use implementation-defined default time zone information. |
| 2099 | If TZ is t, use Universal Time. |
| 2100 | |
| 2101 | Instead of calling this function, you typically want (setenv "TZ" TZ). |
| 2102 | That changes both the environment of the Emacs process and the |
| 2103 | variable `process-environment', whereas `set-time-zone-rule' affects |
| 2104 | only the former. */) |
| 2105 | (Lisp_Object tz) |
| 2106 | { |
| 2107 | const char *tzstring; |
| 2108 | |
| 2109 | if (! (NILP (tz) || EQ (tz, Qt))) |
| 2110 | CHECK_STRING (tz); |
| 2111 | |
| 2112 | if (NILP (tz)) |
| 2113 | tzstring = initial_tz; |
| 2114 | else if (EQ (tz, Qt)) |
| 2115 | tzstring = "UTC0"; |
| 2116 | else |
| 2117 | tzstring = SSDATA (tz); |
| 2118 | |
| 2119 | block_input (); |
| 2120 | set_time_zone_rule (tzstring); |
| 2121 | unblock_input (); |
| 2122 | |
| 2123 | return Qnil; |
| 2124 | } |
| 2125 | |
| 2126 | /* Set the local time zone rule to TZSTRING. |
| 2127 | |
| 2128 | This function is not thread-safe, partly because putenv, unsetenv |
| 2129 | and tzset are not, and partly because of the static storage it |
| 2130 | updates. Other threads that invoke localtime etc. may be adversely |
| 2131 | affected while this function is executing. */ |
| 2132 | |
| 2133 | void |
| 2134 | set_time_zone_rule (const char *tzstring) |
| 2135 | { |
| 2136 | /* A buffer holding a string of the form "TZ=value", intended |
| 2137 | to be part of the environment. */ |
| 2138 | static char *tzvalbuf; |
| 2139 | static ptrdiff_t tzvalbufsize; |
| 2140 | |
| 2141 | int tzeqlen = sizeof "TZ=" - 1; |
| 2142 | |
| 2143 | #ifdef LOCALTIME_CACHE |
| 2144 | /* These two values are known to load tz files in buggy implementations, |
| 2145 | i.e., Solaris 1 executables running under either Solaris 1 or Solaris 2. |
| 2146 | Their values shouldn't matter in non-buggy implementations. |
| 2147 | We don't use string literals for these strings, |
| 2148 | since if a string in the environment is in readonly |
| 2149 | storage, it runs afoul of bugs in SVR4 and Solaris 2.3. |
| 2150 | See Sun bugs 1113095 and 1114114, ``Timezone routines |
| 2151 | improperly modify environment''. */ |
| 2152 | |
| 2153 | static char set_time_zone_rule_tz[][sizeof "TZ=GMT+0"] |
| 2154 | = { "TZ=GMT+0", "TZ=GMT+1" }; |
| 2155 | |
| 2156 | /* In SunOS 4.1.3_U1 and 4.1.4, if TZ has a value like |
| 2157 | "US/Pacific" that loads a tz file, then changes to a value like |
| 2158 | "XXX0" that does not load a tz file, and then changes back to |
| 2159 | its original value, the last change is (incorrectly) ignored. |
| 2160 | Also, if TZ changes twice in succession to values that do |
| 2161 | not load a tz file, tzset can dump core (see Sun bug#1225179). |
| 2162 | The following code works around these bugs. */ |
| 2163 | |
| 2164 | if (tzstring) |
| 2165 | { |
| 2166 | /* Temporarily set TZ to a value that loads a tz file |
| 2167 | and that differs from tzstring. */ |
| 2168 | bool eq0 = strcmp (tzstring, set_time_zone_rule_tz[0] + tzeqlen) == 0; |
| 2169 | xputenv (set_time_zone_rule_tz[eq0]); |
| 2170 | } |
| 2171 | else |
| 2172 | { |
| 2173 | /* The implied tzstring is unknown, so temporarily set TZ to |
| 2174 | two different values that each load a tz file. */ |
| 2175 | xputenv (set_time_zone_rule_tz[0]); |
| 2176 | tzset (); |
| 2177 | xputenv (set_time_zone_rule_tz[1]); |
| 2178 | } |
| 2179 | tzset (); |
| 2180 | tzvalbuf_in_environ = 0; |
| 2181 | #endif |
| 2182 | |
| 2183 | if (!tzstring) |
| 2184 | { |
| 2185 | unsetenv ("TZ"); |
| 2186 | tzvalbuf_in_environ = 0; |
| 2187 | } |
| 2188 | else |
| 2189 | { |
| 2190 | ptrdiff_t tzstringlen = strlen (tzstring); |
| 2191 | |
| 2192 | if (tzvalbufsize <= tzeqlen + tzstringlen) |
| 2193 | { |
| 2194 | unsetenv ("TZ"); |
| 2195 | tzvalbuf_in_environ = 0; |
| 2196 | tzvalbuf = xpalloc (tzvalbuf, &tzvalbufsize, |
| 2197 | tzeqlen + tzstringlen - tzvalbufsize + 1, -1, 1); |
| 2198 | memcpy (tzvalbuf, "TZ=", tzeqlen); |
| 2199 | } |
| 2200 | |
| 2201 | strcpy (tzvalbuf + tzeqlen, tzstring); |
| 2202 | |
| 2203 | if (!tzvalbuf_in_environ) |
| 2204 | { |
| 2205 | xputenv (tzvalbuf); |
| 2206 | tzvalbuf_in_environ = 1; |
| 2207 | } |
| 2208 | } |
| 2209 | |
| 2210 | #ifdef LOCALTIME_CACHE |
| 2211 | tzset (); |
| 2212 | #endif |
| 2213 | } |
| 2214 | \f |
| 2215 | /* Insert NARGS Lisp objects in the array ARGS by calling INSERT_FUNC |
| 2216 | (if a type of object is Lisp_Int) or INSERT_FROM_STRING_FUNC (if a |
| 2217 | type of object is Lisp_String). INHERIT is passed to |
| 2218 | INSERT_FROM_STRING_FUNC as the last argument. */ |
| 2219 | |
| 2220 | static void |
| 2221 | general_insert_function (void (*insert_func) |
| 2222 | (const char *, ptrdiff_t), |
| 2223 | void (*insert_from_string_func) |
| 2224 | (Lisp_Object, ptrdiff_t, ptrdiff_t, |
| 2225 | ptrdiff_t, ptrdiff_t, bool), |
| 2226 | bool inherit, ptrdiff_t nargs, Lisp_Object *args) |
| 2227 | { |
| 2228 | ptrdiff_t argnum; |
| 2229 | Lisp_Object val; |
| 2230 | |
| 2231 | for (argnum = 0; argnum < nargs; argnum++) |
| 2232 | { |
| 2233 | val = args[argnum]; |
| 2234 | if (CHARACTERP (val)) |
| 2235 | { |
| 2236 | int c = XFASTINT (val); |
| 2237 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
| 2238 | int len; |
| 2239 | |
| 2240 | if (!NILP (BVAR (current_buffer, enable_multibyte_characters))) |
| 2241 | len = CHAR_STRING (c, str); |
| 2242 | else |
| 2243 | { |
| 2244 | str[0] = CHAR_TO_BYTE8 (c); |
| 2245 | len = 1; |
| 2246 | } |
| 2247 | (*insert_func) ((char *) str, len); |
| 2248 | } |
| 2249 | else if (STRINGP (val)) |
| 2250 | { |
| 2251 | (*insert_from_string_func) (val, 0, 0, |
| 2252 | SCHARS (val), |
| 2253 | SBYTES (val), |
| 2254 | inherit); |
| 2255 | } |
| 2256 | else |
| 2257 | wrong_type_argument (Qchar_or_string_p, val); |
| 2258 | } |
| 2259 | } |
| 2260 | |
| 2261 | void |
| 2262 | insert1 (Lisp_Object arg) |
| 2263 | { |
| 2264 | Finsert (1, &arg); |
| 2265 | } |
| 2266 | |
| 2267 | |
| 2268 | /* Callers passing one argument to Finsert need not gcpro the |
| 2269 | argument "array", since the only element of the array will |
| 2270 | not be used after calling insert or insert_from_string, so |
| 2271 | we don't care if it gets trashed. */ |
| 2272 | |
| 2273 | DEFUN ("insert", Finsert, Sinsert, 0, MANY, 0, |
| 2274 | doc: /* Insert the arguments, either strings or characters, at point. |
| 2275 | Point and before-insertion markers move forward to end up |
| 2276 | after the inserted text. |
| 2277 | Any other markers at the point of insertion remain before the text. |
| 2278 | |
| 2279 | If the current buffer is multibyte, unibyte strings are converted |
| 2280 | to multibyte for insertion (see `string-make-multibyte'). |
| 2281 | If the current buffer is unibyte, multibyte strings are converted |
| 2282 | to unibyte for insertion (see `string-make-unibyte'). |
| 2283 | |
| 2284 | When operating on binary data, it may be necessary to preserve the |
| 2285 | original bytes of a unibyte string when inserting it into a multibyte |
| 2286 | buffer; to accomplish this, apply `string-as-multibyte' to the string |
| 2287 | and insert the result. |
| 2288 | |
| 2289 | usage: (insert &rest ARGS) */) |
| 2290 | (ptrdiff_t nargs, Lisp_Object *args) |
| 2291 | { |
| 2292 | general_insert_function (insert, insert_from_string, 0, nargs, args); |
| 2293 | return Qnil; |
| 2294 | } |
| 2295 | |
| 2296 | DEFUN ("insert-and-inherit", Finsert_and_inherit, Sinsert_and_inherit, |
| 2297 | 0, MANY, 0, |
| 2298 | doc: /* Insert the arguments at point, inheriting properties from adjoining text. |
| 2299 | Point and before-insertion markers move forward to end up |
| 2300 | after the inserted text. |
| 2301 | Any other markers at the point of insertion remain before the text. |
| 2302 | |
| 2303 | If the current buffer is multibyte, unibyte strings are converted |
| 2304 | to multibyte for insertion (see `unibyte-char-to-multibyte'). |
| 2305 | If the current buffer is unibyte, multibyte strings are converted |
| 2306 | to unibyte for insertion. |
| 2307 | |
| 2308 | usage: (insert-and-inherit &rest ARGS) */) |
| 2309 | (ptrdiff_t nargs, Lisp_Object *args) |
| 2310 | { |
| 2311 | general_insert_function (insert_and_inherit, insert_from_string, 1, |
| 2312 | nargs, args); |
| 2313 | return Qnil; |
| 2314 | } |
| 2315 | |
| 2316 | DEFUN ("insert-before-markers", Finsert_before_markers, Sinsert_before_markers, 0, MANY, 0, |
| 2317 | doc: /* Insert strings or characters at point, relocating markers after the text. |
| 2318 | Point and markers move forward to end up after the inserted text. |
| 2319 | |
| 2320 | If the current buffer is multibyte, unibyte strings are converted |
| 2321 | to multibyte for insertion (see `unibyte-char-to-multibyte'). |
| 2322 | If the current buffer is unibyte, multibyte strings are converted |
| 2323 | to unibyte for insertion. |
| 2324 | |
| 2325 | If an overlay begins at the insertion point, the inserted text falls |
| 2326 | outside the overlay; if a nonempty overlay ends at the insertion |
| 2327 | point, the inserted text falls inside that overlay. |
| 2328 | |
| 2329 | usage: (insert-before-markers &rest ARGS) */) |
| 2330 | (ptrdiff_t nargs, Lisp_Object *args) |
| 2331 | { |
| 2332 | general_insert_function (insert_before_markers, |
| 2333 | insert_from_string_before_markers, 0, |
| 2334 | nargs, args); |
| 2335 | return Qnil; |
| 2336 | } |
| 2337 | |
| 2338 | DEFUN ("insert-before-markers-and-inherit", Finsert_and_inherit_before_markers, |
| 2339 | Sinsert_and_inherit_before_markers, 0, MANY, 0, |
| 2340 | doc: /* Insert text at point, relocating markers and inheriting properties. |
| 2341 | Point and markers move forward to end up after the inserted text. |
| 2342 | |
| 2343 | If the current buffer is multibyte, unibyte strings are converted |
| 2344 | to multibyte for insertion (see `unibyte-char-to-multibyte'). |
| 2345 | If the current buffer is unibyte, multibyte strings are converted |
| 2346 | to unibyte for insertion. |
| 2347 | |
| 2348 | usage: (insert-before-markers-and-inherit &rest ARGS) */) |
| 2349 | (ptrdiff_t nargs, Lisp_Object *args) |
| 2350 | { |
| 2351 | general_insert_function (insert_before_markers_and_inherit, |
| 2352 | insert_from_string_before_markers, 1, |
| 2353 | nargs, args); |
| 2354 | return Qnil; |
| 2355 | } |
| 2356 | \f |
| 2357 | DEFUN ("insert-char", Finsert_char, Sinsert_char, 1, 3, |
| 2358 | "(list (read-char-by-name \"Insert character (Unicode name or hex): \")\ |
| 2359 | (prefix-numeric-value current-prefix-arg)\ |
| 2360 | t))", |
| 2361 | doc: /* Insert COUNT copies of CHARACTER. |
| 2362 | Interactively, prompt for CHARACTER. You can specify CHARACTER in one |
| 2363 | of these ways: |
| 2364 | |
| 2365 | - As its Unicode character name, e.g. \"LATIN SMALL LETTER A\". |
| 2366 | Completion is available; if you type a substring of the name |
| 2367 | preceded by an asterisk `*', Emacs shows all names which include |
| 2368 | that substring, not necessarily at the beginning of the name. |
| 2369 | |
| 2370 | - As a hexadecimal code point, e.g. 263A. Note that code points in |
| 2371 | Emacs are equivalent to Unicode up to 10FFFF (which is the limit of |
| 2372 | the Unicode code space). |
| 2373 | |
| 2374 | - As a code point with a radix specified with #, e.g. #o21430 |
| 2375 | (octal), #x2318 (hex), or #10r8984 (decimal). |
| 2376 | |
| 2377 | If called interactively, COUNT is given by the prefix argument. If |
| 2378 | omitted or nil, it defaults to 1. |
| 2379 | |
| 2380 | Inserting the character(s) relocates point and before-insertion |
| 2381 | markers in the same ways as the function `insert'. |
| 2382 | |
| 2383 | The optional third argument INHERIT, if non-nil, says to inherit text |
| 2384 | properties from adjoining text, if those properties are sticky. If |
| 2385 | called interactively, INHERIT is t. */) |
| 2386 | (Lisp_Object character, Lisp_Object count, Lisp_Object inherit) |
| 2387 | { |
| 2388 | int i, stringlen; |
| 2389 | register ptrdiff_t n; |
| 2390 | int c, len; |
| 2391 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
| 2392 | char string[4000]; |
| 2393 | |
| 2394 | CHECK_CHARACTER (character); |
| 2395 | if (NILP (count)) |
| 2396 | XSETFASTINT (count, 1); |
| 2397 | CHECK_NUMBER (count); |
| 2398 | c = XFASTINT (character); |
| 2399 | |
| 2400 | if (!NILP (BVAR (current_buffer, enable_multibyte_characters))) |
| 2401 | len = CHAR_STRING (c, str); |
| 2402 | else |
| 2403 | str[0] = c, len = 1; |
| 2404 | if (XINT (count) <= 0) |
| 2405 | return Qnil; |
| 2406 | if (BUF_BYTES_MAX / len < XINT (count)) |
| 2407 | buffer_overflow (); |
| 2408 | n = XINT (count) * len; |
| 2409 | stringlen = min (n, sizeof string - sizeof string % len); |
| 2410 | for (i = 0; i < stringlen; i++) |
| 2411 | string[i] = str[i % len]; |
| 2412 | while (n > stringlen) |
| 2413 | { |
| 2414 | QUIT; |
| 2415 | if (!NILP (inherit)) |
| 2416 | insert_and_inherit (string, stringlen); |
| 2417 | else |
| 2418 | insert (string, stringlen); |
| 2419 | n -= stringlen; |
| 2420 | } |
| 2421 | if (!NILP (inherit)) |
| 2422 | insert_and_inherit (string, n); |
| 2423 | else |
| 2424 | insert (string, n); |
| 2425 | return Qnil; |
| 2426 | } |
| 2427 | |
| 2428 | DEFUN ("insert-byte", Finsert_byte, Sinsert_byte, 2, 3, 0, |
| 2429 | doc: /* Insert COUNT (second arg) copies of BYTE (first arg). |
| 2430 | Both arguments are required. |
| 2431 | BYTE is a number of the range 0..255. |
| 2432 | |
| 2433 | If BYTE is 128..255 and the current buffer is multibyte, the |
| 2434 | corresponding eight-bit character is inserted. |
| 2435 | |
| 2436 | Point, and before-insertion markers, are relocated as in the function `insert'. |
| 2437 | The optional third arg INHERIT, if non-nil, says to inherit text properties |
| 2438 | from adjoining text, if those properties are sticky. */) |
| 2439 | (Lisp_Object byte, Lisp_Object count, Lisp_Object inherit) |
| 2440 | { |
| 2441 | CHECK_NUMBER (byte); |
| 2442 | if (XINT (byte) < 0 || XINT (byte) > 255) |
| 2443 | args_out_of_range_3 (byte, make_number (0), make_number (255)); |
| 2444 | if (XINT (byte) >= 128 |
| 2445 | && ! NILP (BVAR (current_buffer, enable_multibyte_characters))) |
| 2446 | XSETFASTINT (byte, BYTE8_TO_CHAR (XINT (byte))); |
| 2447 | return Finsert_char (byte, count, inherit); |
| 2448 | } |
| 2449 | |
| 2450 | \f |
| 2451 | /* Making strings from buffer contents. */ |
| 2452 | |
| 2453 | /* Return a Lisp_String containing the text of the current buffer from |
| 2454 | START to END. If text properties are in use and the current buffer |
| 2455 | has properties in the range specified, the resulting string will also |
| 2456 | have them, if PROPS is true. |
| 2457 | |
| 2458 | We don't want to use plain old make_string here, because it calls |
| 2459 | make_uninit_string, which can cause the buffer arena to be |
| 2460 | compacted. make_string has no way of knowing that the data has |
| 2461 | been moved, and thus copies the wrong data into the string. This |
| 2462 | doesn't effect most of the other users of make_string, so it should |
| 2463 | be left as is. But we should use this function when conjuring |
| 2464 | buffer substrings. */ |
| 2465 | |
| 2466 | Lisp_Object |
| 2467 | make_buffer_string (ptrdiff_t start, ptrdiff_t end, bool props) |
| 2468 | { |
| 2469 | ptrdiff_t start_byte = CHAR_TO_BYTE (start); |
| 2470 | ptrdiff_t end_byte = CHAR_TO_BYTE (end); |
| 2471 | |
| 2472 | return make_buffer_string_both (start, start_byte, end, end_byte, props); |
| 2473 | } |
| 2474 | |
| 2475 | /* Return a Lisp_String containing the text of the current buffer from |
| 2476 | START / START_BYTE to END / END_BYTE. |
| 2477 | |
| 2478 | If text properties are in use and the current buffer |
| 2479 | has properties in the range specified, the resulting string will also |
| 2480 | have them, if PROPS is true. |
| 2481 | |
| 2482 | We don't want to use plain old make_string here, because it calls |
| 2483 | make_uninit_string, which can cause the buffer arena to be |
| 2484 | compacted. make_string has no way of knowing that the data has |
| 2485 | been moved, and thus copies the wrong data into the string. This |
| 2486 | doesn't effect most of the other users of make_string, so it should |
| 2487 | be left as is. But we should use this function when conjuring |
| 2488 | buffer substrings. */ |
| 2489 | |
| 2490 | Lisp_Object |
| 2491 | make_buffer_string_both (ptrdiff_t start, ptrdiff_t start_byte, |
| 2492 | ptrdiff_t end, ptrdiff_t end_byte, bool props) |
| 2493 | { |
| 2494 | Lisp_Object result, tem, tem1; |
| 2495 | |
| 2496 | if (start < GPT && GPT < end) |
| 2497 | move_gap_both (start, start_byte); |
| 2498 | |
| 2499 | if (! NILP (BVAR (current_buffer, enable_multibyte_characters))) |
| 2500 | result = make_uninit_multibyte_string (end - start, end_byte - start_byte); |
| 2501 | else |
| 2502 | result = make_uninit_string (end - start); |
| 2503 | memcpy (SDATA (result), BYTE_POS_ADDR (start_byte), end_byte - start_byte); |
| 2504 | |
| 2505 | /* If desired, update and copy the text properties. */ |
| 2506 | if (props) |
| 2507 | { |
| 2508 | update_buffer_properties (start, end); |
| 2509 | |
| 2510 | tem = Fnext_property_change (make_number (start), Qnil, make_number (end)); |
| 2511 | tem1 = Ftext_properties_at (make_number (start), Qnil); |
| 2512 | |
| 2513 | if (XINT (tem) != end || !NILP (tem1)) |
| 2514 | copy_intervals_to_string (result, current_buffer, start, |
| 2515 | end - start); |
| 2516 | } |
| 2517 | |
| 2518 | return result; |
| 2519 | } |
| 2520 | |
| 2521 | /* Call Vbuffer_access_fontify_functions for the range START ... END |
| 2522 | in the current buffer, if necessary. */ |
| 2523 | |
| 2524 | static void |
| 2525 | update_buffer_properties (ptrdiff_t start, ptrdiff_t end) |
| 2526 | { |
| 2527 | /* If this buffer has some access functions, |
| 2528 | call them, specifying the range of the buffer being accessed. */ |
| 2529 | if (!NILP (Vbuffer_access_fontify_functions)) |
| 2530 | { |
| 2531 | Lisp_Object args[3]; |
| 2532 | Lisp_Object tem; |
| 2533 | |
| 2534 | args[0] = Qbuffer_access_fontify_functions; |
| 2535 | XSETINT (args[1], start); |
| 2536 | XSETINT (args[2], end); |
| 2537 | |
| 2538 | /* But don't call them if we can tell that the work |
| 2539 | has already been done. */ |
| 2540 | if (!NILP (Vbuffer_access_fontified_property)) |
| 2541 | { |
| 2542 | tem = Ftext_property_any (args[1], args[2], |
| 2543 | Vbuffer_access_fontified_property, |
| 2544 | Qnil, Qnil); |
| 2545 | if (! NILP (tem)) |
| 2546 | Frun_hook_with_args (3, args); |
| 2547 | } |
| 2548 | else |
| 2549 | Frun_hook_with_args (3, args); |
| 2550 | } |
| 2551 | } |
| 2552 | |
| 2553 | DEFUN ("buffer-substring", Fbuffer_substring, Sbuffer_substring, 2, 2, 0, |
| 2554 | doc: /* Return the contents of part of the current buffer as a string. |
| 2555 | The two arguments START and END are character positions; |
| 2556 | they can be in either order. |
| 2557 | The string returned is multibyte if the buffer is multibyte. |
| 2558 | |
| 2559 | This function copies the text properties of that part of the buffer |
| 2560 | into the result string; if you don't want the text properties, |
| 2561 | use `buffer-substring-no-properties' instead. */) |
| 2562 | (Lisp_Object start, Lisp_Object end) |
| 2563 | { |
| 2564 | register ptrdiff_t b, e; |
| 2565 | |
| 2566 | validate_region (&start, &end); |
| 2567 | b = XINT (start); |
| 2568 | e = XINT (end); |
| 2569 | |
| 2570 | return make_buffer_string (b, e, 1); |
| 2571 | } |
| 2572 | |
| 2573 | DEFUN ("buffer-substring-no-properties", Fbuffer_substring_no_properties, |
| 2574 | Sbuffer_substring_no_properties, 2, 2, 0, |
| 2575 | doc: /* Return the characters of part of the buffer, without the text properties. |
| 2576 | The two arguments START and END are character positions; |
| 2577 | they can be in either order. */) |
| 2578 | (Lisp_Object start, Lisp_Object end) |
| 2579 | { |
| 2580 | register ptrdiff_t b, e; |
| 2581 | |
| 2582 | validate_region (&start, &end); |
| 2583 | b = XINT (start); |
| 2584 | e = XINT (end); |
| 2585 | |
| 2586 | return make_buffer_string (b, e, 0); |
| 2587 | } |
| 2588 | |
| 2589 | DEFUN ("buffer-string", Fbuffer_string, Sbuffer_string, 0, 0, 0, |
| 2590 | doc: /* Return the contents of the current buffer as a string. |
| 2591 | If narrowing is in effect, this function returns only the visible part |
| 2592 | of the buffer. */) |
| 2593 | (void) |
| 2594 | { |
| 2595 | return make_buffer_string_both (BEGV, BEGV_BYTE, ZV, ZV_BYTE, 1); |
| 2596 | } |
| 2597 | |
| 2598 | DEFUN ("insert-buffer-substring", Finsert_buffer_substring, Sinsert_buffer_substring, |
| 2599 | 1, 3, 0, |
| 2600 | doc: /* Insert before point a substring of the contents of BUFFER. |
| 2601 | BUFFER may be a buffer or a buffer name. |
| 2602 | Arguments START and END are character positions specifying the substring. |
| 2603 | They default to the values of (point-min) and (point-max) in BUFFER. */) |
| 2604 | (Lisp_Object buffer, Lisp_Object start, Lisp_Object end) |
| 2605 | { |
| 2606 | register EMACS_INT b, e, temp; |
| 2607 | register struct buffer *bp, *obuf; |
| 2608 | Lisp_Object buf; |
| 2609 | |
| 2610 | buf = Fget_buffer (buffer); |
| 2611 | if (NILP (buf)) |
| 2612 | nsberror (buffer); |
| 2613 | bp = XBUFFER (buf); |
| 2614 | if (!BUFFER_LIVE_P (bp)) |
| 2615 | error ("Selecting deleted buffer"); |
| 2616 | |
| 2617 | if (NILP (start)) |
| 2618 | b = BUF_BEGV (bp); |
| 2619 | else |
| 2620 | { |
| 2621 | CHECK_NUMBER_COERCE_MARKER (start); |
| 2622 | b = XINT (start); |
| 2623 | } |
| 2624 | if (NILP (end)) |
| 2625 | e = BUF_ZV (bp); |
| 2626 | else |
| 2627 | { |
| 2628 | CHECK_NUMBER_COERCE_MARKER (end); |
| 2629 | e = XINT (end); |
| 2630 | } |
| 2631 | |
| 2632 | if (b > e) |
| 2633 | temp = b, b = e, e = temp; |
| 2634 | |
| 2635 | if (!(BUF_BEGV (bp) <= b && e <= BUF_ZV (bp))) |
| 2636 | args_out_of_range (start, end); |
| 2637 | |
| 2638 | obuf = current_buffer; |
| 2639 | set_buffer_internal_1 (bp); |
| 2640 | update_buffer_properties (b, e); |
| 2641 | set_buffer_internal_1 (obuf); |
| 2642 | |
| 2643 | insert_from_buffer (bp, b, e - b, 0); |
| 2644 | return Qnil; |
| 2645 | } |
| 2646 | |
| 2647 | DEFUN ("compare-buffer-substrings", Fcompare_buffer_substrings, Scompare_buffer_substrings, |
| 2648 | 6, 6, 0, |
| 2649 | doc: /* Compare two substrings of two buffers; return result as number. |
| 2650 | Return -N if first string is less after N-1 chars, +N if first string is |
| 2651 | greater after N-1 chars, or 0 if strings match. Each substring is |
| 2652 | represented as three arguments: BUFFER, START and END. That makes six |
| 2653 | args in all, three for each substring. |
| 2654 | |
| 2655 | The value of `case-fold-search' in the current buffer |
| 2656 | determines whether case is significant or ignored. */) |
| 2657 | (Lisp_Object buffer1, Lisp_Object start1, Lisp_Object end1, Lisp_Object buffer2, Lisp_Object start2, Lisp_Object end2) |
| 2658 | { |
| 2659 | register EMACS_INT begp1, endp1, begp2, endp2, temp; |
| 2660 | register struct buffer *bp1, *bp2; |
| 2661 | register Lisp_Object trt |
| 2662 | = (!NILP (BVAR (current_buffer, case_fold_search)) |
| 2663 | ? BVAR (current_buffer, case_canon_table) : Qnil); |
| 2664 | ptrdiff_t chars = 0; |
| 2665 | ptrdiff_t i1, i2, i1_byte, i2_byte; |
| 2666 | |
| 2667 | /* Find the first buffer and its substring. */ |
| 2668 | |
| 2669 | if (NILP (buffer1)) |
| 2670 | bp1 = current_buffer; |
| 2671 | else |
| 2672 | { |
| 2673 | Lisp_Object buf1; |
| 2674 | buf1 = Fget_buffer (buffer1); |
| 2675 | if (NILP (buf1)) |
| 2676 | nsberror (buffer1); |
| 2677 | bp1 = XBUFFER (buf1); |
| 2678 | if (!BUFFER_LIVE_P (bp1)) |
| 2679 | error ("Selecting deleted buffer"); |
| 2680 | } |
| 2681 | |
| 2682 | if (NILP (start1)) |
| 2683 | begp1 = BUF_BEGV (bp1); |
| 2684 | else |
| 2685 | { |
| 2686 | CHECK_NUMBER_COERCE_MARKER (start1); |
| 2687 | begp1 = XINT (start1); |
| 2688 | } |
| 2689 | if (NILP (end1)) |
| 2690 | endp1 = BUF_ZV (bp1); |
| 2691 | else |
| 2692 | { |
| 2693 | CHECK_NUMBER_COERCE_MARKER (end1); |
| 2694 | endp1 = XINT (end1); |
| 2695 | } |
| 2696 | |
| 2697 | if (begp1 > endp1) |
| 2698 | temp = begp1, begp1 = endp1, endp1 = temp; |
| 2699 | |
| 2700 | if (!(BUF_BEGV (bp1) <= begp1 |
| 2701 | && begp1 <= endp1 |
| 2702 | && endp1 <= BUF_ZV (bp1))) |
| 2703 | args_out_of_range (start1, end1); |
| 2704 | |
| 2705 | /* Likewise for second substring. */ |
| 2706 | |
| 2707 | if (NILP (buffer2)) |
| 2708 | bp2 = current_buffer; |
| 2709 | else |
| 2710 | { |
| 2711 | Lisp_Object buf2; |
| 2712 | buf2 = Fget_buffer (buffer2); |
| 2713 | if (NILP (buf2)) |
| 2714 | nsberror (buffer2); |
| 2715 | bp2 = XBUFFER (buf2); |
| 2716 | if (!BUFFER_LIVE_P (bp2)) |
| 2717 | error ("Selecting deleted buffer"); |
| 2718 | } |
| 2719 | |
| 2720 | if (NILP (start2)) |
| 2721 | begp2 = BUF_BEGV (bp2); |
| 2722 | else |
| 2723 | { |
| 2724 | CHECK_NUMBER_COERCE_MARKER (start2); |
| 2725 | begp2 = XINT (start2); |
| 2726 | } |
| 2727 | if (NILP (end2)) |
| 2728 | endp2 = BUF_ZV (bp2); |
| 2729 | else |
| 2730 | { |
| 2731 | CHECK_NUMBER_COERCE_MARKER (end2); |
| 2732 | endp2 = XINT (end2); |
| 2733 | } |
| 2734 | |
| 2735 | if (begp2 > endp2) |
| 2736 | temp = begp2, begp2 = endp2, endp2 = temp; |
| 2737 | |
| 2738 | if (!(BUF_BEGV (bp2) <= begp2 |
| 2739 | && begp2 <= endp2 |
| 2740 | && endp2 <= BUF_ZV (bp2))) |
| 2741 | args_out_of_range (start2, end2); |
| 2742 | |
| 2743 | i1 = begp1; |
| 2744 | i2 = begp2; |
| 2745 | i1_byte = buf_charpos_to_bytepos (bp1, i1); |
| 2746 | i2_byte = buf_charpos_to_bytepos (bp2, i2); |
| 2747 | |
| 2748 | while (i1 < endp1 && i2 < endp2) |
| 2749 | { |
| 2750 | /* When we find a mismatch, we must compare the |
| 2751 | characters, not just the bytes. */ |
| 2752 | int c1, c2; |
| 2753 | |
| 2754 | QUIT; |
| 2755 | |
| 2756 | if (! NILP (BVAR (bp1, enable_multibyte_characters))) |
| 2757 | { |
| 2758 | c1 = BUF_FETCH_MULTIBYTE_CHAR (bp1, i1_byte); |
| 2759 | BUF_INC_POS (bp1, i1_byte); |
| 2760 | i1++; |
| 2761 | } |
| 2762 | else |
| 2763 | { |
| 2764 | c1 = BUF_FETCH_BYTE (bp1, i1); |
| 2765 | MAKE_CHAR_MULTIBYTE (c1); |
| 2766 | i1++; |
| 2767 | } |
| 2768 | |
| 2769 | if (! NILP (BVAR (bp2, enable_multibyte_characters))) |
| 2770 | { |
| 2771 | c2 = BUF_FETCH_MULTIBYTE_CHAR (bp2, i2_byte); |
| 2772 | BUF_INC_POS (bp2, i2_byte); |
| 2773 | i2++; |
| 2774 | } |
| 2775 | else |
| 2776 | { |
| 2777 | c2 = BUF_FETCH_BYTE (bp2, i2); |
| 2778 | MAKE_CHAR_MULTIBYTE (c2); |
| 2779 | i2++; |
| 2780 | } |
| 2781 | |
| 2782 | if (!NILP (trt)) |
| 2783 | { |
| 2784 | c1 = char_table_translate (trt, c1); |
| 2785 | c2 = char_table_translate (trt, c2); |
| 2786 | } |
| 2787 | if (c1 < c2) |
| 2788 | return make_number (- 1 - chars); |
| 2789 | if (c1 > c2) |
| 2790 | return make_number (chars + 1); |
| 2791 | |
| 2792 | chars++; |
| 2793 | } |
| 2794 | |
| 2795 | /* The strings match as far as they go. |
| 2796 | If one is shorter, that one is less. */ |
| 2797 | if (chars < endp1 - begp1) |
| 2798 | return make_number (chars + 1); |
| 2799 | else if (chars < endp2 - begp2) |
| 2800 | return make_number (- chars - 1); |
| 2801 | |
| 2802 | /* Same length too => they are equal. */ |
| 2803 | return make_number (0); |
| 2804 | } |
| 2805 | \f |
| 2806 | static void |
| 2807 | subst_char_in_region_unwind (Lisp_Object arg) |
| 2808 | { |
| 2809 | bset_undo_list (current_buffer, arg); |
| 2810 | } |
| 2811 | |
| 2812 | static void |
| 2813 | subst_char_in_region_unwind_1 (Lisp_Object arg) |
| 2814 | { |
| 2815 | bset_filename (current_buffer, arg); |
| 2816 | } |
| 2817 | |
| 2818 | DEFUN ("subst-char-in-region", Fsubst_char_in_region, |
| 2819 | Ssubst_char_in_region, 4, 5, 0, |
| 2820 | doc: /* From START to END, replace FROMCHAR with TOCHAR each time it occurs. |
| 2821 | If optional arg NOUNDO is non-nil, don't record this change for undo |
| 2822 | and don't mark the buffer as really changed. |
| 2823 | Both characters must have the same length of multi-byte form. */) |
| 2824 | (Lisp_Object start, Lisp_Object end, Lisp_Object fromchar, Lisp_Object tochar, Lisp_Object noundo) |
| 2825 | { |
| 2826 | register ptrdiff_t pos, pos_byte, stop, i, len, end_byte; |
| 2827 | /* Keep track of the first change in the buffer: |
| 2828 | if 0 we haven't found it yet. |
| 2829 | if < 0 we've found it and we've run the before-change-function. |
| 2830 | if > 0 we've actually performed it and the value is its position. */ |
| 2831 | ptrdiff_t changed = 0; |
| 2832 | unsigned char fromstr[MAX_MULTIBYTE_LENGTH], tostr[MAX_MULTIBYTE_LENGTH]; |
| 2833 | unsigned char *p; |
| 2834 | dynwind_begin (); |
| 2835 | #define COMBINING_NO 0 |
| 2836 | #define COMBINING_BEFORE 1 |
| 2837 | #define COMBINING_AFTER 2 |
| 2838 | #define COMBINING_BOTH (COMBINING_BEFORE | COMBINING_AFTER) |
| 2839 | int maybe_byte_combining = COMBINING_NO; |
| 2840 | ptrdiff_t last_changed = 0; |
| 2841 | bool multibyte_p |
| 2842 | = !NILP (BVAR (current_buffer, enable_multibyte_characters)); |
| 2843 | int fromc, toc; |
| 2844 | |
| 2845 | restart: |
| 2846 | |
| 2847 | validate_region (&start, &end); |
| 2848 | CHECK_CHARACTER (fromchar); |
| 2849 | CHECK_CHARACTER (tochar); |
| 2850 | fromc = XFASTINT (fromchar); |
| 2851 | toc = XFASTINT (tochar); |
| 2852 | |
| 2853 | if (multibyte_p) |
| 2854 | { |
| 2855 | len = CHAR_STRING (fromc, fromstr); |
| 2856 | if (CHAR_STRING (toc, tostr) != len) |
| 2857 | error ("Characters in `subst-char-in-region' have different byte-lengths"); |
| 2858 | if (!ASCII_CHAR_P (*tostr)) |
| 2859 | { |
| 2860 | /* If *TOSTR is in the range 0x80..0x9F and TOCHAR is not a |
| 2861 | complete multibyte character, it may be combined with the |
| 2862 | after bytes. If it is in the range 0xA0..0xFF, it may be |
| 2863 | combined with the before and after bytes. */ |
| 2864 | if (!CHAR_HEAD_P (*tostr)) |
| 2865 | maybe_byte_combining = COMBINING_BOTH; |
| 2866 | else if (BYTES_BY_CHAR_HEAD (*tostr) > len) |
| 2867 | maybe_byte_combining = COMBINING_AFTER; |
| 2868 | } |
| 2869 | } |
| 2870 | else |
| 2871 | { |
| 2872 | len = 1; |
| 2873 | fromstr[0] = fromc; |
| 2874 | tostr[0] = toc; |
| 2875 | } |
| 2876 | |
| 2877 | pos = XINT (start); |
| 2878 | pos_byte = CHAR_TO_BYTE (pos); |
| 2879 | stop = CHAR_TO_BYTE (XINT (end)); |
| 2880 | end_byte = stop; |
| 2881 | |
| 2882 | /* If we don't want undo, turn off putting stuff on the list. |
| 2883 | That's faster than getting rid of things, |
| 2884 | and it prevents even the entry for a first change. |
| 2885 | Also inhibit locking the file. */ |
| 2886 | if (!changed && !NILP (noundo)) |
| 2887 | { |
| 2888 | record_unwind_protect (subst_char_in_region_unwind, |
| 2889 | BVAR (current_buffer, undo_list)); |
| 2890 | bset_undo_list (current_buffer, Qt); |
| 2891 | /* Don't do file-locking. */ |
| 2892 | record_unwind_protect (subst_char_in_region_unwind_1, |
| 2893 | BVAR (current_buffer, filename)); |
| 2894 | bset_filename (current_buffer, Qnil); |
| 2895 | } |
| 2896 | |
| 2897 | if (pos_byte < GPT_BYTE) |
| 2898 | stop = min (stop, GPT_BYTE); |
| 2899 | while (1) |
| 2900 | { |
| 2901 | ptrdiff_t pos_byte_next = pos_byte; |
| 2902 | |
| 2903 | if (pos_byte >= stop) |
| 2904 | { |
| 2905 | if (pos_byte >= end_byte) break; |
| 2906 | stop = end_byte; |
| 2907 | } |
| 2908 | p = BYTE_POS_ADDR (pos_byte); |
| 2909 | if (multibyte_p) |
| 2910 | INC_POS (pos_byte_next); |
| 2911 | else |
| 2912 | ++pos_byte_next; |
| 2913 | if (pos_byte_next - pos_byte == len |
| 2914 | && p[0] == fromstr[0] |
| 2915 | && (len == 1 |
| 2916 | || (p[1] == fromstr[1] |
| 2917 | && (len == 2 || (p[2] == fromstr[2] |
| 2918 | && (len == 3 || p[3] == fromstr[3])))))) |
| 2919 | { |
| 2920 | if (changed < 0) |
| 2921 | /* We've already seen this and run the before-change-function; |
| 2922 | this time we only need to record the actual position. */ |
| 2923 | changed = pos; |
| 2924 | else if (!changed) |
| 2925 | { |
| 2926 | changed = -1; |
| 2927 | modify_text (pos, XINT (end)); |
| 2928 | |
| 2929 | if (! NILP (noundo)) |
| 2930 | { |
| 2931 | if (MODIFF - 1 == SAVE_MODIFF) |
| 2932 | SAVE_MODIFF++; |
| 2933 | if (MODIFF - 1 == BUF_AUTOSAVE_MODIFF (current_buffer)) |
| 2934 | BUF_AUTOSAVE_MODIFF (current_buffer)++; |
| 2935 | } |
| 2936 | |
| 2937 | /* The before-change-function may have moved the gap |
| 2938 | or even modified the buffer so we should start over. */ |
| 2939 | goto restart; |
| 2940 | } |
| 2941 | |
| 2942 | /* Take care of the case where the new character |
| 2943 | combines with neighboring bytes. */ |
| 2944 | if (maybe_byte_combining |
| 2945 | && (maybe_byte_combining == COMBINING_AFTER |
| 2946 | ? (pos_byte_next < Z_BYTE |
| 2947 | && ! CHAR_HEAD_P (FETCH_BYTE (pos_byte_next))) |
| 2948 | : ((pos_byte_next < Z_BYTE |
| 2949 | && ! CHAR_HEAD_P (FETCH_BYTE (pos_byte_next))) |
| 2950 | || (pos_byte > BEG_BYTE |
| 2951 | && ! ASCII_CHAR_P (FETCH_BYTE (pos_byte - 1)))))) |
| 2952 | { |
| 2953 | Lisp_Object tem, string; |
| 2954 | |
| 2955 | struct gcpro gcpro1; |
| 2956 | |
| 2957 | tem = BVAR (current_buffer, undo_list); |
| 2958 | GCPRO1 (tem); |
| 2959 | |
| 2960 | /* Make a multibyte string containing this single character. */ |
| 2961 | string = make_multibyte_string ((char *) tostr, 1, len); |
| 2962 | /* replace_range is less efficient, because it moves the gap, |
| 2963 | but it handles combining correctly. */ |
| 2964 | replace_range (pos, pos + 1, string, |
| 2965 | 0, 0, 1); |
| 2966 | pos_byte_next = CHAR_TO_BYTE (pos); |
| 2967 | if (pos_byte_next > pos_byte) |
| 2968 | /* Before combining happened. We should not increment |
| 2969 | POS. So, to cancel the later increment of POS, |
| 2970 | decrease it now. */ |
| 2971 | pos--; |
| 2972 | else |
| 2973 | INC_POS (pos_byte_next); |
| 2974 | |
| 2975 | if (! NILP (noundo)) |
| 2976 | bset_undo_list (current_buffer, tem); |
| 2977 | |
| 2978 | UNGCPRO; |
| 2979 | } |
| 2980 | else |
| 2981 | { |
| 2982 | if (NILP (noundo)) |
| 2983 | record_change (pos, 1); |
| 2984 | for (i = 0; i < len; i++) *p++ = tostr[i]; |
| 2985 | } |
| 2986 | last_changed = pos + 1; |
| 2987 | } |
| 2988 | pos_byte = pos_byte_next; |
| 2989 | pos++; |
| 2990 | } |
| 2991 | |
| 2992 | if (changed > 0) |
| 2993 | { |
| 2994 | signal_after_change (changed, |
| 2995 | last_changed - changed, last_changed - changed); |
| 2996 | update_compositions (changed, last_changed, CHECK_ALL); |
| 2997 | } |
| 2998 | |
| 2999 | dynwind_end (); |
| 3000 | return Qnil; |
| 3001 | } |
| 3002 | |
| 3003 | |
| 3004 | static Lisp_Object check_translation (ptrdiff_t, ptrdiff_t, ptrdiff_t, |
| 3005 | Lisp_Object); |
| 3006 | |
| 3007 | /* Helper function for Ftranslate_region_internal. |
| 3008 | |
| 3009 | Check if a character sequence at POS (POS_BYTE) matches an element |
| 3010 | of VAL. VAL is a list (([FROM-CHAR ...] . TO) ...). If a matching |
| 3011 | element is found, return it. Otherwise return Qnil. */ |
| 3012 | |
| 3013 | static Lisp_Object |
| 3014 | check_translation (ptrdiff_t pos, ptrdiff_t pos_byte, ptrdiff_t end, |
| 3015 | Lisp_Object val) |
| 3016 | { |
| 3017 | int buf_size = 16, buf_used = 0; |
| 3018 | int *buf = alloca (sizeof (int) * buf_size); |
| 3019 | |
| 3020 | for (; CONSP (val); val = XCDR (val)) |
| 3021 | { |
| 3022 | Lisp_Object elt; |
| 3023 | ptrdiff_t len, i; |
| 3024 | |
| 3025 | elt = XCAR (val); |
| 3026 | if (! CONSP (elt)) |
| 3027 | continue; |
| 3028 | elt = XCAR (elt); |
| 3029 | if (! VECTORP (elt)) |
| 3030 | continue; |
| 3031 | len = ASIZE (elt); |
| 3032 | if (len <= end - pos) |
| 3033 | { |
| 3034 | for (i = 0; i < len; i++) |
| 3035 | { |
| 3036 | if (buf_used <= i) |
| 3037 | { |
| 3038 | unsigned char *p = BYTE_POS_ADDR (pos_byte); |
| 3039 | int len1; |
| 3040 | |
| 3041 | if (buf_used == buf_size) |
| 3042 | { |
| 3043 | int *newbuf; |
| 3044 | |
| 3045 | buf_size += 16; |
| 3046 | newbuf = alloca (sizeof (int) * buf_size); |
| 3047 | memcpy (newbuf, buf, sizeof (int) * buf_used); |
| 3048 | buf = newbuf; |
| 3049 | } |
| 3050 | buf[buf_used++] = STRING_CHAR_AND_LENGTH (p, len1); |
| 3051 | pos_byte += len1; |
| 3052 | } |
| 3053 | if (XINT (AREF (elt, i)) != buf[i]) |
| 3054 | break; |
| 3055 | } |
| 3056 | if (i == len) |
| 3057 | return XCAR (val); |
| 3058 | } |
| 3059 | } |
| 3060 | return Qnil; |
| 3061 | } |
| 3062 | |
| 3063 | |
| 3064 | DEFUN ("translate-region-internal", Ftranslate_region_internal, |
| 3065 | Stranslate_region_internal, 3, 3, 0, |
| 3066 | doc: /* Internal use only. |
| 3067 | From START to END, translate characters according to TABLE. |
| 3068 | TABLE is a string or a char-table; the Nth character in it is the |
| 3069 | mapping for the character with code N. |
| 3070 | It returns the number of characters changed. */) |
| 3071 | (Lisp_Object start, Lisp_Object end, register Lisp_Object table) |
| 3072 | { |
| 3073 | register unsigned char *tt; /* Trans table. */ |
| 3074 | register int nc; /* New character. */ |
| 3075 | int cnt; /* Number of changes made. */ |
| 3076 | ptrdiff_t size; /* Size of translate table. */ |
| 3077 | ptrdiff_t pos, pos_byte, end_pos; |
| 3078 | bool multibyte = !NILP (BVAR (current_buffer, enable_multibyte_characters)); |
| 3079 | bool string_multibyte IF_LINT (= 0); |
| 3080 | |
| 3081 | validate_region (&start, &end); |
| 3082 | if (CHAR_TABLE_P (table)) |
| 3083 | { |
| 3084 | if (! EQ (XCHAR_TABLE (table)->purpose, Qtranslation_table)) |
| 3085 | error ("Not a translation table"); |
| 3086 | size = MAX_CHAR; |
| 3087 | tt = NULL; |
| 3088 | } |
| 3089 | else |
| 3090 | { |
| 3091 | CHECK_STRING (table); |
| 3092 | |
| 3093 | if (! multibyte && (SCHARS (table) < SBYTES (table))) |
| 3094 | table = string_make_unibyte (table); |
| 3095 | string_multibyte = SCHARS (table) < SBYTES (table); |
| 3096 | size = SBYTES (table); |
| 3097 | tt = SDATA (table); |
| 3098 | } |
| 3099 | |
| 3100 | pos = XINT (start); |
| 3101 | pos_byte = CHAR_TO_BYTE (pos); |
| 3102 | end_pos = XINT (end); |
| 3103 | modify_text (pos, end_pos); |
| 3104 | |
| 3105 | cnt = 0; |
| 3106 | for (; pos < end_pos; ) |
| 3107 | { |
| 3108 | register unsigned char *p = BYTE_POS_ADDR (pos_byte); |
| 3109 | unsigned char *str, buf[MAX_MULTIBYTE_LENGTH]; |
| 3110 | int len, str_len; |
| 3111 | int oc; |
| 3112 | Lisp_Object val; |
| 3113 | |
| 3114 | if (multibyte) |
| 3115 | oc = STRING_CHAR_AND_LENGTH (p, len); |
| 3116 | else |
| 3117 | oc = *p, len = 1; |
| 3118 | if (oc < size) |
| 3119 | { |
| 3120 | if (tt) |
| 3121 | { |
| 3122 | /* Reload as signal_after_change in last iteration may GC. */ |
| 3123 | tt = SDATA (table); |
| 3124 | if (string_multibyte) |
| 3125 | { |
| 3126 | str = tt + string_char_to_byte (table, oc); |
| 3127 | nc = STRING_CHAR_AND_LENGTH (str, str_len); |
| 3128 | } |
| 3129 | else |
| 3130 | { |
| 3131 | nc = tt[oc]; |
| 3132 | if (! ASCII_CHAR_P (nc) && multibyte) |
| 3133 | { |
| 3134 | str_len = BYTE8_STRING (nc, buf); |
| 3135 | str = buf; |
| 3136 | } |
| 3137 | else |
| 3138 | { |
| 3139 | str_len = 1; |
| 3140 | str = tt + oc; |
| 3141 | } |
| 3142 | } |
| 3143 | } |
| 3144 | else |
| 3145 | { |
| 3146 | nc = oc; |
| 3147 | val = CHAR_TABLE_REF (table, oc); |
| 3148 | if (CHARACTERP (val)) |
| 3149 | { |
| 3150 | nc = XFASTINT (val); |
| 3151 | str_len = CHAR_STRING (nc, buf); |
| 3152 | str = buf; |
| 3153 | } |
| 3154 | else if (VECTORP (val) || (CONSP (val))) |
| 3155 | { |
| 3156 | /* VAL is [TO_CHAR ...] or (([FROM-CHAR ...] . TO) ...) |
| 3157 | where TO is TO-CHAR or [TO-CHAR ...]. */ |
| 3158 | nc = -1; |
| 3159 | } |
| 3160 | } |
| 3161 | |
| 3162 | if (nc != oc && nc >= 0) |
| 3163 | { |
| 3164 | /* Simple one char to one char translation. */ |
| 3165 | if (len != str_len) |
| 3166 | { |
| 3167 | Lisp_Object string; |
| 3168 | |
| 3169 | /* This is less efficient, because it moves the gap, |
| 3170 | but it should handle multibyte characters correctly. */ |
| 3171 | string = make_multibyte_string ((char *) str, 1, str_len); |
| 3172 | replace_range (pos, pos + 1, string, 1, 0, 1); |
| 3173 | len = str_len; |
| 3174 | } |
| 3175 | else |
| 3176 | { |
| 3177 | record_change (pos, 1); |
| 3178 | while (str_len-- > 0) |
| 3179 | *p++ = *str++; |
| 3180 | signal_after_change (pos, 1, 1); |
| 3181 | update_compositions (pos, pos + 1, CHECK_BORDER); |
| 3182 | } |
| 3183 | ++cnt; |
| 3184 | } |
| 3185 | else if (nc < 0) |
| 3186 | { |
| 3187 | Lisp_Object string; |
| 3188 | |
| 3189 | if (CONSP (val)) |
| 3190 | { |
| 3191 | val = check_translation (pos, pos_byte, end_pos, val); |
| 3192 | if (NILP (val)) |
| 3193 | { |
| 3194 | pos_byte += len; |
| 3195 | pos++; |
| 3196 | continue; |
| 3197 | } |
| 3198 | /* VAL is ([FROM-CHAR ...] . TO). */ |
| 3199 | len = ASIZE (XCAR (val)); |
| 3200 | val = XCDR (val); |
| 3201 | } |
| 3202 | else |
| 3203 | len = 1; |
| 3204 | |
| 3205 | if (VECTORP (val)) |
| 3206 | { |
| 3207 | string = Fconcat (1, &val); |
| 3208 | } |
| 3209 | else |
| 3210 | { |
| 3211 | string = Fmake_string (make_number (1), val); |
| 3212 | } |
| 3213 | replace_range (pos, pos + len, string, 1, 0, 1); |
| 3214 | pos_byte += SBYTES (string); |
| 3215 | pos += SCHARS (string); |
| 3216 | cnt += SCHARS (string); |
| 3217 | end_pos += SCHARS (string) - len; |
| 3218 | continue; |
| 3219 | } |
| 3220 | } |
| 3221 | pos_byte += len; |
| 3222 | pos++; |
| 3223 | } |
| 3224 | |
| 3225 | return make_number (cnt); |
| 3226 | } |
| 3227 | |
| 3228 | DEFUN ("delete-region", Fdelete_region, Sdelete_region, 2, 2, "r", |
| 3229 | doc: /* Delete the text between START and END. |
| 3230 | If called interactively, delete the region between point and mark. |
| 3231 | This command deletes buffer text without modifying the kill ring. */) |
| 3232 | (Lisp_Object start, Lisp_Object end) |
| 3233 | { |
| 3234 | validate_region (&start, &end); |
| 3235 | del_range (XINT (start), XINT (end)); |
| 3236 | return Qnil; |
| 3237 | } |
| 3238 | |
| 3239 | DEFUN ("delete-and-extract-region", Fdelete_and_extract_region, |
| 3240 | Sdelete_and_extract_region, 2, 2, 0, |
| 3241 | doc: /* Delete the text between START and END and return it. */) |
| 3242 | (Lisp_Object start, Lisp_Object end) |
| 3243 | { |
| 3244 | validate_region (&start, &end); |
| 3245 | if (XINT (start) == XINT (end)) |
| 3246 | return empty_unibyte_string; |
| 3247 | return del_range_1 (XINT (start), XINT (end), 1, 1); |
| 3248 | } |
| 3249 | \f |
| 3250 | DEFUN ("widen", Fwiden, Swiden, 0, 0, "", |
| 3251 | doc: /* Remove restrictions (narrowing) from current buffer. |
| 3252 | This allows the buffer's full text to be seen and edited. */) |
| 3253 | (void) |
| 3254 | { |
| 3255 | if (BEG != BEGV || Z != ZV) |
| 3256 | current_buffer->clip_changed = 1; |
| 3257 | BEGV = BEG; |
| 3258 | BEGV_BYTE = BEG_BYTE; |
| 3259 | SET_BUF_ZV_BOTH (current_buffer, Z, Z_BYTE); |
| 3260 | /* Changing the buffer bounds invalidates any recorded current column. */ |
| 3261 | invalidate_current_column (); |
| 3262 | return Qnil; |
| 3263 | } |
| 3264 | |
| 3265 | DEFUN ("narrow-to-region", Fnarrow_to_region, Snarrow_to_region, 2, 2, "r", |
| 3266 | doc: /* Restrict editing in this buffer to the current region. |
| 3267 | The rest of the text becomes temporarily invisible and untouchable |
| 3268 | but is not deleted; if you save the buffer in a file, the invisible |
| 3269 | text is included in the file. \\[widen] makes all visible again. |
| 3270 | See also `save-restriction'. |
| 3271 | |
| 3272 | When calling from a program, pass two arguments; positions (integers |
| 3273 | or markers) bounding the text that should remain visible. */) |
| 3274 | (register Lisp_Object start, Lisp_Object end) |
| 3275 | { |
| 3276 | CHECK_NUMBER_COERCE_MARKER (start); |
| 3277 | CHECK_NUMBER_COERCE_MARKER (end); |
| 3278 | |
| 3279 | if (XINT (start) > XINT (end)) |
| 3280 | { |
| 3281 | Lisp_Object tem; |
| 3282 | tem = start; start = end; end = tem; |
| 3283 | } |
| 3284 | |
| 3285 | if (!(BEG <= XINT (start) && XINT (start) <= XINT (end) && XINT (end) <= Z)) |
| 3286 | args_out_of_range (start, end); |
| 3287 | |
| 3288 | if (BEGV != XFASTINT (start) || ZV != XFASTINT (end)) |
| 3289 | current_buffer->clip_changed = 1; |
| 3290 | |
| 3291 | SET_BUF_BEGV (current_buffer, XFASTINT (start)); |
| 3292 | SET_BUF_ZV (current_buffer, XFASTINT (end)); |
| 3293 | if (PT < XFASTINT (start)) |
| 3294 | SET_PT (XFASTINT (start)); |
| 3295 | if (PT > XFASTINT (end)) |
| 3296 | SET_PT (XFASTINT (end)); |
| 3297 | /* Changing the buffer bounds invalidates any recorded current column. */ |
| 3298 | invalidate_current_column (); |
| 3299 | return Qnil; |
| 3300 | } |
| 3301 | |
| 3302 | Lisp_Object |
| 3303 | save_restriction_save (void) |
| 3304 | { |
| 3305 | if (BEGV == BEG && ZV == Z) |
| 3306 | /* The common case that the buffer isn't narrowed. |
| 3307 | We return just the buffer object, which save_restriction_restore |
| 3308 | recognizes as meaning `no restriction'. */ |
| 3309 | return Fcurrent_buffer (); |
| 3310 | else |
| 3311 | /* We have to save a restriction, so return a pair of markers, one |
| 3312 | for the beginning and one for the end. */ |
| 3313 | { |
| 3314 | Lisp_Object beg, end; |
| 3315 | |
| 3316 | beg = build_marker (current_buffer, BEGV, BEGV_BYTE); |
| 3317 | end = build_marker (current_buffer, ZV, ZV_BYTE); |
| 3318 | |
| 3319 | /* END must move forward if text is inserted at its exact location. */ |
| 3320 | XMARKER (end)->insertion_type = 1; |
| 3321 | |
| 3322 | return Fcons (beg, end); |
| 3323 | } |
| 3324 | } |
| 3325 | |
| 3326 | void |
| 3327 | save_restriction_restore (Lisp_Object data) |
| 3328 | { |
| 3329 | struct buffer *cur = NULL; |
| 3330 | struct buffer *buf = (CONSP (data) |
| 3331 | ? XMARKER (XCAR (data))->buffer |
| 3332 | : XBUFFER (data)); |
| 3333 | |
| 3334 | if (buf && buf != current_buffer && !NILP (BVAR (buf, pt_marker))) |
| 3335 | { /* If `buf' uses markers to keep track of PT, BEGV, and ZV (as |
| 3336 | is the case if it is or has an indirect buffer), then make |
| 3337 | sure it is current before we update BEGV, so |
| 3338 | set_buffer_internal takes care of managing those markers. */ |
| 3339 | cur = current_buffer; |
| 3340 | set_buffer_internal (buf); |
| 3341 | } |
| 3342 | |
| 3343 | if (CONSP (data)) |
| 3344 | /* A pair of marks bounding a saved restriction. */ |
| 3345 | { |
| 3346 | struct Lisp_Marker *beg = XMARKER (XCAR (data)); |
| 3347 | struct Lisp_Marker *end = XMARKER (XCDR (data)); |
| 3348 | eassert (buf == end->buffer); |
| 3349 | |
| 3350 | if (buf /* Verify marker still points to a buffer. */ |
| 3351 | && (beg->charpos != BUF_BEGV (buf) || end->charpos != BUF_ZV (buf))) |
| 3352 | /* The restriction has changed from the saved one, so restore |
| 3353 | the saved restriction. */ |
| 3354 | { |
| 3355 | ptrdiff_t pt = BUF_PT (buf); |
| 3356 | |
| 3357 | SET_BUF_BEGV_BOTH (buf, beg->charpos, beg->bytepos); |
| 3358 | SET_BUF_ZV_BOTH (buf, end->charpos, end->bytepos); |
| 3359 | |
| 3360 | if (pt < beg->charpos || pt > end->charpos) |
| 3361 | /* The point is outside the new visible range, move it inside. */ |
| 3362 | SET_BUF_PT_BOTH (buf, |
| 3363 | clip_to_bounds (beg->charpos, pt, end->charpos), |
| 3364 | clip_to_bounds (beg->bytepos, BUF_PT_BYTE (buf), |
| 3365 | end->bytepos)); |
| 3366 | |
| 3367 | buf->clip_changed = 1; /* Remember that the narrowing changed. */ |
| 3368 | } |
| 3369 | } |
| 3370 | else |
| 3371 | /* A buffer, which means that there was no old restriction. */ |
| 3372 | { |
| 3373 | if (buf /* Verify marker still points to a buffer. */ |
| 3374 | && (BUF_BEGV (buf) != BUF_BEG (buf) || BUF_ZV (buf) != BUF_Z (buf))) |
| 3375 | /* The buffer has been narrowed, get rid of the narrowing. */ |
| 3376 | { |
| 3377 | SET_BUF_BEGV_BOTH (buf, BUF_BEG (buf), BUF_BEG_BYTE (buf)); |
| 3378 | SET_BUF_ZV_BOTH (buf, BUF_Z (buf), BUF_Z_BYTE (buf)); |
| 3379 | |
| 3380 | buf->clip_changed = 1; /* Remember that the narrowing changed. */ |
| 3381 | } |
| 3382 | } |
| 3383 | |
| 3384 | /* Changing the buffer bounds invalidates any recorded current column. */ |
| 3385 | invalidate_current_column (); |
| 3386 | |
| 3387 | if (cur) |
| 3388 | set_buffer_internal (cur); |
| 3389 | } |
| 3390 | |
| 3391 | DEFUN ("save-restriction", Fsave_restriction, Ssave_restriction, 0, UNEVALLED, 0, |
| 3392 | doc: /* Execute BODY, saving and restoring current buffer's restrictions. |
| 3393 | The buffer's restrictions make parts of the beginning and end invisible. |
| 3394 | \(They are set up with `narrow-to-region' and eliminated with `widen'.) |
| 3395 | This special form, `save-restriction', saves the current buffer's restrictions |
| 3396 | when it is entered, and restores them when it is exited. |
| 3397 | So any `narrow-to-region' within BODY lasts only until the end of the form. |
| 3398 | The old restrictions settings are restored |
| 3399 | even in case of abnormal exit (throw or error). |
| 3400 | |
| 3401 | The value returned is the value of the last form in BODY. |
| 3402 | |
| 3403 | Note: if you are using both `save-excursion' and `save-restriction', |
| 3404 | use `save-excursion' outermost: |
| 3405 | (save-excursion (save-restriction ...)) |
| 3406 | |
| 3407 | usage: (save-restriction &rest BODY) */) |
| 3408 | (Lisp_Object body) |
| 3409 | { |
| 3410 | register Lisp_Object val; |
| 3411 | dynwind_begin (); |
| 3412 | |
| 3413 | record_unwind_protect (save_restriction_restore, save_restriction_save ()); |
| 3414 | val = Fprogn (body); |
| 3415 | dynwind_end (); |
| 3416 | return val; |
| 3417 | } |
| 3418 | \f |
| 3419 | DEFUN ("message", Fmessage, Smessage, 1, MANY, 0, |
| 3420 | doc: /* Display a message at the bottom of the screen. |
| 3421 | The message also goes into the `*Messages*' buffer, if `message-log-max' |
| 3422 | is non-nil. (In keyboard macros, that's all it does.) |
| 3423 | Return the message. |
| 3424 | |
| 3425 | In batch mode, the message is printed to the standard error stream, |
| 3426 | followed by a newline. |
| 3427 | |
| 3428 | The first argument is a format control string, and the rest are data |
| 3429 | to be formatted under control of the string. See `format' for details. |
| 3430 | |
| 3431 | Note: Use (message "%s" VALUE) to print the value of expressions and |
| 3432 | variables to avoid accidentally interpreting `%' as format specifiers. |
| 3433 | |
| 3434 | If the first argument is nil or the empty string, the function clears |
| 3435 | any existing message; this lets the minibuffer contents show. See |
| 3436 | also `current-message'. |
| 3437 | |
| 3438 | usage: (message FORMAT-STRING &rest ARGS) */) |
| 3439 | (ptrdiff_t nargs, Lisp_Object *args) |
| 3440 | { |
| 3441 | if (NILP (args[0]) |
| 3442 | || (STRINGP (args[0]) |
| 3443 | && SBYTES (args[0]) == 0)) |
| 3444 | { |
| 3445 | message1 (0); |
| 3446 | return args[0]; |
| 3447 | } |
| 3448 | else |
| 3449 | { |
| 3450 | register Lisp_Object val; |
| 3451 | val = Fformat (nargs, args); |
| 3452 | message3 (val); |
| 3453 | return val; |
| 3454 | } |
| 3455 | } |
| 3456 | |
| 3457 | DEFUN ("message-box", Fmessage_box, Smessage_box, 1, MANY, 0, |
| 3458 | doc: /* Display a message, in a dialog box if possible. |
| 3459 | If a dialog box is not available, use the echo area. |
| 3460 | The first argument is a format control string, and the rest are data |
| 3461 | to be formatted under control of the string. See `format' for details. |
| 3462 | |
| 3463 | If the first argument is nil or the empty string, clear any existing |
| 3464 | message; let the minibuffer contents show. |
| 3465 | |
| 3466 | usage: (message-box FORMAT-STRING &rest ARGS) */) |
| 3467 | (ptrdiff_t nargs, Lisp_Object *args) |
| 3468 | { |
| 3469 | if (NILP (args[0])) |
| 3470 | { |
| 3471 | message1 (0); |
| 3472 | return Qnil; |
| 3473 | } |
| 3474 | else |
| 3475 | { |
| 3476 | Lisp_Object val = Fformat (nargs, args); |
| 3477 | Lisp_Object pane, menu; |
| 3478 | struct gcpro gcpro1; |
| 3479 | |
| 3480 | pane = list1 (Fcons (build_string ("OK"), Qt)); |
| 3481 | GCPRO1 (pane); |
| 3482 | menu = Fcons (val, pane); |
| 3483 | Fx_popup_dialog (Qt, menu, Qt); |
| 3484 | UNGCPRO; |
| 3485 | return val; |
| 3486 | } |
| 3487 | } |
| 3488 | |
| 3489 | DEFUN ("message-or-box", Fmessage_or_box, Smessage_or_box, 1, MANY, 0, |
| 3490 | doc: /* Display a message in a dialog box or in the echo area. |
| 3491 | If this command was invoked with the mouse, use a dialog box if |
| 3492 | `use-dialog-box' is non-nil. |
| 3493 | Otherwise, use the echo area. |
| 3494 | The first argument is a format control string, and the rest are data |
| 3495 | to be formatted under control of the string. See `format' for details. |
| 3496 | |
| 3497 | If the first argument is nil or the empty string, clear any existing |
| 3498 | message; let the minibuffer contents show. |
| 3499 | |
| 3500 | usage: (message-or-box FORMAT-STRING &rest ARGS) */) |
| 3501 | (ptrdiff_t nargs, Lisp_Object *args) |
| 3502 | { |
| 3503 | if ((NILP (last_nonmenu_event) || CONSP (last_nonmenu_event)) |
| 3504 | && use_dialog_box) |
| 3505 | return Fmessage_box (nargs, args); |
| 3506 | return Fmessage (nargs, args); |
| 3507 | } |
| 3508 | |
| 3509 | DEFUN ("current-message", Fcurrent_message, Scurrent_message, 0, 0, 0, |
| 3510 | doc: /* Return the string currently displayed in the echo area, or nil if none. */) |
| 3511 | (void) |
| 3512 | { |
| 3513 | return current_message (); |
| 3514 | } |
| 3515 | |
| 3516 | |
| 3517 | DEFUN ("propertize", Fpropertize, Spropertize, 1, MANY, 0, |
| 3518 | doc: /* Return a copy of STRING with text properties added. |
| 3519 | First argument is the string to copy. |
| 3520 | Remaining arguments form a sequence of PROPERTY VALUE pairs for text |
| 3521 | properties to add to the result. |
| 3522 | usage: (propertize STRING &rest PROPERTIES) */) |
| 3523 | (ptrdiff_t nargs, Lisp_Object *args) |
| 3524 | { |
| 3525 | Lisp_Object properties, string; |
| 3526 | struct gcpro gcpro1, gcpro2; |
| 3527 | ptrdiff_t i; |
| 3528 | |
| 3529 | /* Number of args must be odd. */ |
| 3530 | if ((nargs & 1) == 0) |
| 3531 | error ("Wrong number of arguments"); |
| 3532 | |
| 3533 | properties = string = Qnil; |
| 3534 | GCPRO2 (properties, string); |
| 3535 | |
| 3536 | /* First argument must be a string. */ |
| 3537 | CHECK_STRING (args[0]); |
| 3538 | string = Fcopy_sequence (args[0]); |
| 3539 | |
| 3540 | for (i = 1; i < nargs; i += 2) |
| 3541 | properties = Fcons (args[i], Fcons (args[i + 1], properties)); |
| 3542 | |
| 3543 | Fadd_text_properties (make_number (0), |
| 3544 | make_number (SCHARS (string)), |
| 3545 | properties, string); |
| 3546 | return string; |
| 3547 | } |
| 3548 | |
| 3549 | DEFUN ("format", Fformat, Sformat, 1, MANY, 0, |
| 3550 | doc: /* Format a string out of a format-string and arguments. |
| 3551 | The first argument is a format control string. |
| 3552 | The other arguments are substituted into it to make the result, a string. |
| 3553 | |
| 3554 | The format control string may contain %-sequences meaning to substitute |
| 3555 | the next available argument: |
| 3556 | |
| 3557 | %s means print a string argument. Actually, prints any object, with `princ'. |
| 3558 | %d means print as number in decimal (%o octal, %x hex). |
| 3559 | %X is like %x, but uses upper case. |
| 3560 | %e means print a number in exponential notation. |
| 3561 | %f means print a number in decimal-point notation. |
| 3562 | %g means print a number in exponential notation |
| 3563 | or decimal-point notation, whichever uses fewer characters. |
| 3564 | %c means print a number as a single character. |
| 3565 | %S means print any object as an s-expression (using `prin1'). |
| 3566 | |
| 3567 | The argument used for %d, %o, %x, %e, %f, %g or %c must be a number. |
| 3568 | Use %% to put a single % into the output. |
| 3569 | |
| 3570 | A %-sequence may contain optional flag, width, and precision |
| 3571 | specifiers, as follows: |
| 3572 | |
| 3573 | %<flags><width><precision>character |
| 3574 | |
| 3575 | where flags is [+ #-0]+, width is [0-9]+, and precision is .[0-9]+ |
| 3576 | |
| 3577 | The + flag character inserts a + before any positive number, while a |
| 3578 | space inserts a space before any positive number; these flags only |
| 3579 | affect %d, %e, %f, and %g sequences, and the + flag takes precedence. |
| 3580 | The - and 0 flags affect the width specifier, as described below. |
| 3581 | |
| 3582 | The # flag means to use an alternate display form for %o, %x, %X, %e, |
| 3583 | %f, and %g sequences: for %o, it ensures that the result begins with |
| 3584 | \"0\"; for %x and %X, it prefixes the result with \"0x\" or \"0X\"; |
| 3585 | for %e, %f, and %g, it causes a decimal point to be included even if |
| 3586 | the precision is zero. |
| 3587 | |
| 3588 | The width specifier supplies a lower limit for the length of the |
| 3589 | printed representation. The padding, if any, normally goes on the |
| 3590 | left, but it goes on the right if the - flag is present. The padding |
| 3591 | character is normally a space, but it is 0 if the 0 flag is present. |
| 3592 | The 0 flag is ignored if the - flag is present, or the format sequence |
| 3593 | is something other than %d, %e, %f, and %g. |
| 3594 | |
| 3595 | For %e, %f, and %g sequences, the number after the "." in the |
| 3596 | precision specifier says how many decimal places to show; if zero, the |
| 3597 | decimal point itself is omitted. For %s and %S, the precision |
| 3598 | specifier truncates the string to the given width. |
| 3599 | |
| 3600 | usage: (format STRING &rest OBJECTS) */) |
| 3601 | (ptrdiff_t nargs, Lisp_Object *args) |
| 3602 | { |
| 3603 | ptrdiff_t n; /* The number of the next arg to substitute. */ |
| 3604 | char initial_buffer[4000]; |
| 3605 | char *buf = initial_buffer; |
| 3606 | ptrdiff_t bufsize = sizeof initial_buffer; |
| 3607 | ptrdiff_t max_bufsize = STRING_BYTES_BOUND + 1; |
| 3608 | char *p; |
| 3609 | char *format, *end, *format_start; |
| 3610 | ptrdiff_t formatlen, nchars; |
| 3611 | /* True if the format is multibyte. */ |
| 3612 | bool multibyte_format = 0; |
| 3613 | /* True if the output should be a multibyte string, |
| 3614 | which is true if any of the inputs is one. */ |
| 3615 | bool multibyte = 0; |
| 3616 | /* When we make a multibyte string, we must pay attention to the |
| 3617 | byte combining problem, i.e., a byte may be combined with a |
| 3618 | multibyte character of the previous string. This flag tells if we |
| 3619 | must consider such a situation or not. */ |
| 3620 | bool maybe_combine_byte; |
| 3621 | Lisp_Object val; |
| 3622 | bool arg_intervals = 0; |
| 3623 | USE_SAFE_ALLOCA; |
| 3624 | |
| 3625 | /* discarded[I] is 1 if byte I of the format |
| 3626 | string was not copied into the output. |
| 3627 | It is 2 if byte I was not the first byte of its character. */ |
| 3628 | char *discarded; |
| 3629 | |
| 3630 | /* Each element records, for one argument, |
| 3631 | the start and end bytepos in the output string, |
| 3632 | whether the argument has been converted to string (e.g., due to "%S"), |
| 3633 | and whether the argument is a string with intervals. |
| 3634 | info[0] is unused. Unused elements have -1 for start. */ |
| 3635 | struct info |
| 3636 | { |
| 3637 | ptrdiff_t start, end; |
| 3638 | bool_bf converted_to_string : 1; |
| 3639 | bool_bf intervals : 1; |
| 3640 | } *info = 0; |
| 3641 | |
| 3642 | /* It should not be necessary to GCPRO ARGS, because |
| 3643 | the caller in the interpreter should take care of that. */ |
| 3644 | |
| 3645 | CHECK_STRING (args[0]); |
| 3646 | format_start = SSDATA (args[0]); |
| 3647 | formatlen = SBYTES (args[0]); |
| 3648 | |
| 3649 | /* Allocate the info and discarded tables. */ |
| 3650 | { |
| 3651 | ptrdiff_t i; |
| 3652 | if ((SIZE_MAX - formatlen) / sizeof (struct info) <= nargs) |
| 3653 | memory_full (SIZE_MAX); |
| 3654 | info = SAFE_ALLOCA ((nargs + 1) * sizeof *info + formatlen); |
| 3655 | discarded = (char *) &info[nargs + 1]; |
| 3656 | for (i = 0; i < nargs + 1; i++) |
| 3657 | { |
| 3658 | info[i].start = -1; |
| 3659 | info[i].intervals = info[i].converted_to_string = 0; |
| 3660 | } |
| 3661 | memset (discarded, 0, formatlen); |
| 3662 | } |
| 3663 | |
| 3664 | /* Try to determine whether the result should be multibyte. |
| 3665 | This is not always right; sometimes the result needs to be multibyte |
| 3666 | because of an object that we will pass through prin1, |
| 3667 | and in that case, we won't know it here. */ |
| 3668 | multibyte_format = STRING_MULTIBYTE (args[0]); |
| 3669 | multibyte = multibyte_format; |
| 3670 | for (n = 1; !multibyte && n < nargs; n++) |
| 3671 | if (STRINGP (args[n]) && STRING_MULTIBYTE (args[n])) |
| 3672 | multibyte = 1; |
| 3673 | |
| 3674 | /* If we start out planning a unibyte result, |
| 3675 | then discover it has to be multibyte, we jump back to retry. */ |
| 3676 | retry: |
| 3677 | |
| 3678 | p = buf; |
| 3679 | nchars = 0; |
| 3680 | n = 0; |
| 3681 | |
| 3682 | /* Scan the format and store result in BUF. */ |
| 3683 | format = format_start; |
| 3684 | end = format + formatlen; |
| 3685 | maybe_combine_byte = 0; |
| 3686 | |
| 3687 | while (format != end) |
| 3688 | { |
| 3689 | /* The values of N and FORMAT when the loop body is entered. */ |
| 3690 | ptrdiff_t n0 = n; |
| 3691 | char *format0 = format; |
| 3692 | |
| 3693 | /* Bytes needed to represent the output of this conversion. */ |
| 3694 | ptrdiff_t convbytes; |
| 3695 | |
| 3696 | if (*format == '%') |
| 3697 | { |
| 3698 | /* General format specifications look like |
| 3699 | |
| 3700 | '%' [flags] [field-width] [precision] format |
| 3701 | |
| 3702 | where |
| 3703 | |
| 3704 | flags ::= [-+0# ]+ |
| 3705 | field-width ::= [0-9]+ |
| 3706 | precision ::= '.' [0-9]* |
| 3707 | |
| 3708 | If a field-width is specified, it specifies to which width |
| 3709 | the output should be padded with blanks, if the output |
| 3710 | string is shorter than field-width. |
| 3711 | |
| 3712 | If precision is specified, it specifies the number of |
| 3713 | digits to print after the '.' for floats, or the max. |
| 3714 | number of chars to print from a string. */ |
| 3715 | |
| 3716 | bool minus_flag = 0; |
| 3717 | bool plus_flag = 0; |
| 3718 | bool space_flag = 0; |
| 3719 | bool sharp_flag = 0; |
| 3720 | bool zero_flag = 0; |
| 3721 | ptrdiff_t field_width; |
| 3722 | bool precision_given; |
| 3723 | uintmax_t precision = UINTMAX_MAX; |
| 3724 | char *num_end; |
| 3725 | char conversion; |
| 3726 | |
| 3727 | while (1) |
| 3728 | { |
| 3729 | switch (*++format) |
| 3730 | { |
| 3731 | case '-': minus_flag = 1; continue; |
| 3732 | case '+': plus_flag = 1; continue; |
| 3733 | case ' ': space_flag = 1; continue; |
| 3734 | case '#': sharp_flag = 1; continue; |
| 3735 | case '0': zero_flag = 1; continue; |
| 3736 | } |
| 3737 | break; |
| 3738 | } |
| 3739 | |
| 3740 | /* Ignore flags when sprintf ignores them. */ |
| 3741 | space_flag &= ~ plus_flag; |
| 3742 | zero_flag &= ~ minus_flag; |
| 3743 | |
| 3744 | { |
| 3745 | uintmax_t w = strtoumax (format, &num_end, 10); |
| 3746 | if (max_bufsize <= w) |
| 3747 | string_overflow (); |
| 3748 | field_width = w; |
| 3749 | } |
| 3750 | precision_given = *num_end == '.'; |
| 3751 | if (precision_given) |
| 3752 | precision = strtoumax (num_end + 1, &num_end, 10); |
| 3753 | format = num_end; |
| 3754 | |
| 3755 | if (format == end) |
| 3756 | error ("Format string ends in middle of format specifier"); |
| 3757 | |
| 3758 | memset (&discarded[format0 - format_start], 1, format - format0); |
| 3759 | conversion = *format; |
| 3760 | if (conversion == '%') |
| 3761 | goto copy_char; |
| 3762 | discarded[format - format_start] = 1; |
| 3763 | format++; |
| 3764 | |
| 3765 | ++n; |
| 3766 | if (! (n < nargs)) |
| 3767 | error ("Not enough arguments for format string"); |
| 3768 | |
| 3769 | /* For 'S', prin1 the argument, and then treat like 's'. |
| 3770 | For 's', princ any argument that is not a string or |
| 3771 | symbol. But don't do this conversion twice, which might |
| 3772 | happen after retrying. */ |
| 3773 | if ((conversion == 'S' |
| 3774 | || (conversion == 's' |
| 3775 | && ! STRINGP (args[n]) && ! SYMBOLP (args[n])))) |
| 3776 | { |
| 3777 | if (! info[n].converted_to_string) |
| 3778 | { |
| 3779 | Lisp_Object noescape = conversion == 'S' ? Qnil : Qt; |
| 3780 | args[n] = Fprin1_to_string (args[n], noescape); |
| 3781 | info[n].converted_to_string = 1; |
| 3782 | if (STRING_MULTIBYTE (args[n]) && ! multibyte) |
| 3783 | { |
| 3784 | multibyte = 1; |
| 3785 | goto retry; |
| 3786 | } |
| 3787 | } |
| 3788 | conversion = 's'; |
| 3789 | } |
| 3790 | else if (conversion == 'c') |
| 3791 | { |
| 3792 | if (FLOATP (args[n])) |
| 3793 | { |
| 3794 | double d = XFLOAT_DATA (args[n]); |
| 3795 | args[n] = make_number (FIXNUM_OVERFLOW_P (d) ? -1 : d); |
| 3796 | } |
| 3797 | |
| 3798 | if (INTEGERP (args[n]) && ! ASCII_CHAR_P (XINT (args[n]))) |
| 3799 | { |
| 3800 | if (!multibyte) |
| 3801 | { |
| 3802 | multibyte = 1; |
| 3803 | goto retry; |
| 3804 | } |
| 3805 | args[n] = Fchar_to_string (args[n]); |
| 3806 | info[n].converted_to_string = 1; |
| 3807 | } |
| 3808 | |
| 3809 | if (info[n].converted_to_string) |
| 3810 | conversion = 's'; |
| 3811 | zero_flag = 0; |
| 3812 | } |
| 3813 | |
| 3814 | if (SYMBOLP (args[n])) |
| 3815 | { |
| 3816 | args[n] = SYMBOL_NAME (args[n]); |
| 3817 | if (STRING_MULTIBYTE (args[n]) && ! multibyte) |
| 3818 | { |
| 3819 | multibyte = 1; |
| 3820 | goto retry; |
| 3821 | } |
| 3822 | } |
| 3823 | |
| 3824 | if (conversion == 's') |
| 3825 | { |
| 3826 | /* handle case (precision[n] >= 0) */ |
| 3827 | |
| 3828 | ptrdiff_t width, padding, nbytes; |
| 3829 | ptrdiff_t nchars_string; |
| 3830 | |
| 3831 | ptrdiff_t prec = -1; |
| 3832 | if (precision_given && precision <= TYPE_MAXIMUM (ptrdiff_t)) |
| 3833 | prec = precision; |
| 3834 | |
| 3835 | /* lisp_string_width ignores a precision of 0, but GNU |
| 3836 | libc functions print 0 characters when the precision |
| 3837 | is 0. Imitate libc behavior here. Changing |
| 3838 | lisp_string_width is the right thing, and will be |
| 3839 | done, but meanwhile we work with it. */ |
| 3840 | |
| 3841 | if (prec == 0) |
| 3842 | width = nchars_string = nbytes = 0; |
| 3843 | else |
| 3844 | { |
| 3845 | ptrdiff_t nch, nby; |
| 3846 | width = lisp_string_width (args[n], prec, &nch, &nby); |
| 3847 | if (prec < 0) |
| 3848 | { |
| 3849 | nchars_string = SCHARS (args[n]); |
| 3850 | nbytes = SBYTES (args[n]); |
| 3851 | } |
| 3852 | else |
| 3853 | { |
| 3854 | nchars_string = nch; |
| 3855 | nbytes = nby; |
| 3856 | } |
| 3857 | } |
| 3858 | |
| 3859 | convbytes = nbytes; |
| 3860 | if (convbytes && multibyte && ! STRING_MULTIBYTE (args[n])) |
| 3861 | convbytes = count_size_as_multibyte (SDATA (args[n]), nbytes); |
| 3862 | |
| 3863 | padding = width < field_width ? field_width - width : 0; |
| 3864 | |
| 3865 | if (max_bufsize - padding <= convbytes) |
| 3866 | string_overflow (); |
| 3867 | convbytes += padding; |
| 3868 | if (convbytes <= buf + bufsize - p) |
| 3869 | { |
| 3870 | if (! minus_flag) |
| 3871 | { |
| 3872 | memset (p, ' ', padding); |
| 3873 | p += padding; |
| 3874 | nchars += padding; |
| 3875 | } |
| 3876 | |
| 3877 | if (p > buf |
| 3878 | && multibyte |
| 3879 | && !ASCII_CHAR_P (*((unsigned char *) p - 1)) |
| 3880 | && STRING_MULTIBYTE (args[n]) |
| 3881 | && !CHAR_HEAD_P (SREF (args[n], 0))) |
| 3882 | maybe_combine_byte = 1; |
| 3883 | |
| 3884 | p += copy_text (SDATA (args[n]), (unsigned char *) p, |
| 3885 | nbytes, |
| 3886 | STRING_MULTIBYTE (args[n]), multibyte); |
| 3887 | |
| 3888 | info[n].start = nchars; |
| 3889 | nchars += nchars_string; |
| 3890 | info[n].end = nchars; |
| 3891 | |
| 3892 | if (minus_flag) |
| 3893 | { |
| 3894 | memset (p, ' ', padding); |
| 3895 | p += padding; |
| 3896 | nchars += padding; |
| 3897 | } |
| 3898 | |
| 3899 | /* If this argument has text properties, record where |
| 3900 | in the result string it appears. */ |
| 3901 | if (string_intervals (args[n])) |
| 3902 | info[n].intervals = arg_intervals = 1; |
| 3903 | |
| 3904 | continue; |
| 3905 | } |
| 3906 | } |
| 3907 | else if (! (conversion == 'c' || conversion == 'd' |
| 3908 | || conversion == 'e' || conversion == 'f' |
| 3909 | || conversion == 'g' || conversion == 'i' |
| 3910 | || conversion == 'o' || conversion == 'x' |
| 3911 | || conversion == 'X')) |
| 3912 | error ("Invalid format operation %%%c", |
| 3913 | STRING_CHAR ((unsigned char *) format - 1)); |
| 3914 | else if (! (INTEGERP (args[n]) || FLOATP (args[n]))) |
| 3915 | error ("Format specifier doesn't match argument type"); |
| 3916 | else |
| 3917 | { |
| 3918 | enum |
| 3919 | { |
| 3920 | /* Maximum precision for a %f conversion such that the |
| 3921 | trailing output digit might be nonzero. Any precision |
| 3922 | larger than this will not yield useful information. */ |
| 3923 | USEFUL_PRECISION_MAX = |
| 3924 | ((1 - DBL_MIN_EXP) |
| 3925 | * (FLT_RADIX == 2 || FLT_RADIX == 10 ? 1 |
| 3926 | : FLT_RADIX == 16 ? 4 |
| 3927 | : -1)), |
| 3928 | |
| 3929 | /* Maximum number of bytes generated by any format, if |
| 3930 | precision is no more than USEFUL_PRECISION_MAX. |
| 3931 | On all practical hosts, %f is the worst case. */ |
| 3932 | SPRINTF_BUFSIZE = |
| 3933 | sizeof "-." + (DBL_MAX_10_EXP + 1) + USEFUL_PRECISION_MAX, |
| 3934 | |
| 3935 | /* Length of pM (that is, of pMd without the |
| 3936 | trailing "d"). */ |
| 3937 | pMlen = sizeof pMd - 2 |
| 3938 | }; |
| 3939 | verify (USEFUL_PRECISION_MAX > 0); |
| 3940 | |
| 3941 | int prec; |
| 3942 | ptrdiff_t padding, sprintf_bytes; |
| 3943 | uintmax_t excess_precision, numwidth; |
| 3944 | uintmax_t leading_zeros = 0, trailing_zeros = 0; |
| 3945 | |
| 3946 | char sprintf_buf[SPRINTF_BUFSIZE]; |
| 3947 | |
| 3948 | /* Copy of conversion specification, modified somewhat. |
| 3949 | At most three flags F can be specified at once. */ |
| 3950 | char convspec[sizeof "%FFF.*d" + pMlen]; |
| 3951 | |
| 3952 | /* Avoid undefined behavior in underlying sprintf. */ |
| 3953 | if (conversion == 'd' || conversion == 'i') |
| 3954 | sharp_flag = 0; |
| 3955 | |
| 3956 | /* Create the copy of the conversion specification, with |
| 3957 | any width and precision removed, with ".*" inserted, |
| 3958 | and with pM inserted for integer formats. */ |
| 3959 | { |
| 3960 | char *f = convspec; |
| 3961 | *f++ = '%'; |
| 3962 | *f = '-'; f += minus_flag; |
| 3963 | *f = '+'; f += plus_flag; |
| 3964 | *f = ' '; f += space_flag; |
| 3965 | *f = '#'; f += sharp_flag; |
| 3966 | *f = '0'; f += zero_flag; |
| 3967 | *f++ = '.'; |
| 3968 | *f++ = '*'; |
| 3969 | if (conversion == 'd' || conversion == 'i' |
| 3970 | || conversion == 'o' || conversion == 'x' |
| 3971 | || conversion == 'X') |
| 3972 | { |
| 3973 | memcpy (f, pMd, pMlen); |
| 3974 | f += pMlen; |
| 3975 | zero_flag &= ~ precision_given; |
| 3976 | } |
| 3977 | *f++ = conversion; |
| 3978 | *f = '\0'; |
| 3979 | } |
| 3980 | |
| 3981 | prec = -1; |
| 3982 | if (precision_given) |
| 3983 | prec = min (precision, USEFUL_PRECISION_MAX); |
| 3984 | |
| 3985 | /* Use sprintf to format this number into sprintf_buf. Omit |
| 3986 | padding and excess precision, though, because sprintf limits |
| 3987 | output length to INT_MAX. |
| 3988 | |
| 3989 | There are four types of conversion: double, unsigned |
| 3990 | char (passed as int), wide signed int, and wide |
| 3991 | unsigned int. Treat them separately because the |
| 3992 | sprintf ABI is sensitive to which type is passed. Be |
| 3993 | careful about integer overflow, NaNs, infinities, and |
| 3994 | conversions; for example, the min and max macros are |
| 3995 | not suitable here. */ |
| 3996 | if (conversion == 'e' || conversion == 'f' || conversion == 'g') |
| 3997 | { |
| 3998 | double x = (INTEGERP (args[n]) |
| 3999 | ? XINT (args[n]) |
| 4000 | : XFLOAT_DATA (args[n])); |
| 4001 | sprintf_bytes = sprintf (sprintf_buf, convspec, prec, x); |
| 4002 | } |
| 4003 | else if (conversion == 'c') |
| 4004 | { |
| 4005 | /* Don't use sprintf here, as it might mishandle prec. */ |
| 4006 | sprintf_buf[0] = XINT (args[n]); |
| 4007 | sprintf_bytes = prec != 0; |
| 4008 | } |
| 4009 | else if (conversion == 'd') |
| 4010 | { |
| 4011 | /* For float, maybe we should use "%1.0f" |
| 4012 | instead so it also works for values outside |
| 4013 | the integer range. */ |
| 4014 | printmax_t x; |
| 4015 | if (INTEGERP (args[n])) |
| 4016 | x = XINT (args[n]); |
| 4017 | else |
| 4018 | { |
| 4019 | double d = XFLOAT_DATA (args[n]); |
| 4020 | if (d < 0) |
| 4021 | { |
| 4022 | x = TYPE_MINIMUM (printmax_t); |
| 4023 | if (x < d) |
| 4024 | x = d; |
| 4025 | } |
| 4026 | else |
| 4027 | { |
| 4028 | x = TYPE_MAXIMUM (printmax_t); |
| 4029 | if (d < x) |
| 4030 | x = d; |
| 4031 | } |
| 4032 | } |
| 4033 | sprintf_bytes = sprintf (sprintf_buf, convspec, prec, x); |
| 4034 | } |
| 4035 | else |
| 4036 | { |
| 4037 | /* Don't sign-extend for octal or hex printing. */ |
| 4038 | uprintmax_t x; |
| 4039 | if (INTEGERP (args[n])) |
| 4040 | x = XUINT (args[n]); |
| 4041 | else |
| 4042 | { |
| 4043 | double d = XFLOAT_DATA (args[n]); |
| 4044 | if (d < 0) |
| 4045 | x = 0; |
| 4046 | else |
| 4047 | { |
| 4048 | x = TYPE_MAXIMUM (uprintmax_t); |
| 4049 | if (d < x) |
| 4050 | x = d; |
| 4051 | } |
| 4052 | } |
| 4053 | sprintf_bytes = sprintf (sprintf_buf, convspec, prec, x); |
| 4054 | } |
| 4055 | |
| 4056 | /* Now the length of the formatted item is known, except it omits |
| 4057 | padding and excess precision. Deal with excess precision |
| 4058 | first. This happens only when the format specifies |
| 4059 | ridiculously large precision. */ |
| 4060 | excess_precision = precision - prec; |
| 4061 | if (excess_precision) |
| 4062 | { |
| 4063 | if (conversion == 'e' || conversion == 'f' |
| 4064 | || conversion == 'g') |
| 4065 | { |
| 4066 | if ((conversion == 'g' && ! sharp_flag) |
| 4067 | || ! ('0' <= sprintf_buf[sprintf_bytes - 1] |
| 4068 | && sprintf_buf[sprintf_bytes - 1] <= '9')) |
| 4069 | excess_precision = 0; |
| 4070 | else |
| 4071 | { |
| 4072 | if (conversion == 'g') |
| 4073 | { |
| 4074 | char *dot = strchr (sprintf_buf, '.'); |
| 4075 | if (!dot) |
| 4076 | excess_precision = 0; |
| 4077 | } |
| 4078 | } |
| 4079 | trailing_zeros = excess_precision; |
| 4080 | } |
| 4081 | else |
| 4082 | leading_zeros = excess_precision; |
| 4083 | } |
| 4084 | |
| 4085 | /* Compute the total bytes needed for this item, including |
| 4086 | excess precision and padding. */ |
| 4087 | numwidth = sprintf_bytes + excess_precision; |
| 4088 | padding = numwidth < field_width ? field_width - numwidth : 0; |
| 4089 | if (max_bufsize - sprintf_bytes <= excess_precision |
| 4090 | || max_bufsize - padding <= numwidth) |
| 4091 | string_overflow (); |
| 4092 | convbytes = numwidth + padding; |
| 4093 | |
| 4094 | if (convbytes <= buf + bufsize - p) |
| 4095 | { |
| 4096 | /* Copy the formatted item from sprintf_buf into buf, |
| 4097 | inserting padding and excess-precision zeros. */ |
| 4098 | |
| 4099 | char *src = sprintf_buf; |
| 4100 | char src0 = src[0]; |
| 4101 | int exponent_bytes = 0; |
| 4102 | bool signedp = src0 == '-' || src0 == '+' || src0 == ' '; |
| 4103 | int significand_bytes; |
| 4104 | if (zero_flag |
| 4105 | && ((src[signedp] >= '0' && src[signedp] <= '9') |
| 4106 | || (src[signedp] >= 'a' && src[signedp] <= 'f') |
| 4107 | || (src[signedp] >= 'A' && src[signedp] <= 'F'))) |
| 4108 | { |
| 4109 | leading_zeros += padding; |
| 4110 | padding = 0; |
| 4111 | } |
| 4112 | |
| 4113 | if (excess_precision |
| 4114 | && (conversion == 'e' || conversion == 'g')) |
| 4115 | { |
| 4116 | char *e = strchr (src, 'e'); |
| 4117 | if (e) |
| 4118 | exponent_bytes = src + sprintf_bytes - e; |
| 4119 | } |
| 4120 | |
| 4121 | if (! minus_flag) |
| 4122 | { |
| 4123 | memset (p, ' ', padding); |
| 4124 | p += padding; |
| 4125 | nchars += padding; |
| 4126 | } |
| 4127 | |
| 4128 | *p = src0; |
| 4129 | src += signedp; |
| 4130 | p += signedp; |
| 4131 | memset (p, '0', leading_zeros); |
| 4132 | p += leading_zeros; |
| 4133 | significand_bytes = sprintf_bytes - signedp - exponent_bytes; |
| 4134 | memcpy (p, src, significand_bytes); |
| 4135 | p += significand_bytes; |
| 4136 | src += significand_bytes; |
| 4137 | memset (p, '0', trailing_zeros); |
| 4138 | p += trailing_zeros; |
| 4139 | memcpy (p, src, exponent_bytes); |
| 4140 | p += exponent_bytes; |
| 4141 | |
| 4142 | info[n].start = nchars; |
| 4143 | nchars += leading_zeros + sprintf_bytes + trailing_zeros; |
| 4144 | info[n].end = nchars; |
| 4145 | |
| 4146 | if (minus_flag) |
| 4147 | { |
| 4148 | memset (p, ' ', padding); |
| 4149 | p += padding; |
| 4150 | nchars += padding; |
| 4151 | } |
| 4152 | |
| 4153 | continue; |
| 4154 | } |
| 4155 | } |
| 4156 | } |
| 4157 | else |
| 4158 | copy_char: |
| 4159 | { |
| 4160 | /* Copy a single character from format to buf. */ |
| 4161 | |
| 4162 | char *src = format; |
| 4163 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
| 4164 | |
| 4165 | if (multibyte_format) |
| 4166 | { |
| 4167 | /* Copy a whole multibyte character. */ |
| 4168 | if (p > buf |
| 4169 | && !ASCII_CHAR_P (*((unsigned char *) p - 1)) |
| 4170 | && !CHAR_HEAD_P (*format)) |
| 4171 | maybe_combine_byte = 1; |
| 4172 | |
| 4173 | do |
| 4174 | format++; |
| 4175 | while (! CHAR_HEAD_P (*format)); |
| 4176 | |
| 4177 | convbytes = format - src; |
| 4178 | memset (&discarded[src + 1 - format_start], 2, convbytes - 1); |
| 4179 | } |
| 4180 | else |
| 4181 | { |
| 4182 | unsigned char uc = *format++; |
| 4183 | if (! multibyte || ASCII_CHAR_P (uc)) |
| 4184 | convbytes = 1; |
| 4185 | else |
| 4186 | { |
| 4187 | int c = BYTE8_TO_CHAR (uc); |
| 4188 | convbytes = CHAR_STRING (c, str); |
| 4189 | src = (char *) str; |
| 4190 | } |
| 4191 | } |
| 4192 | |
| 4193 | if (convbytes <= buf + bufsize - p) |
| 4194 | { |
| 4195 | memcpy (p, src, convbytes); |
| 4196 | p += convbytes; |
| 4197 | nchars++; |
| 4198 | continue; |
| 4199 | } |
| 4200 | } |
| 4201 | |
| 4202 | /* There wasn't enough room to store this conversion or single |
| 4203 | character. CONVBYTES says how much room is needed. Allocate |
| 4204 | enough room (and then some) and do it again. */ |
| 4205 | { |
| 4206 | ptrdiff_t used = p - buf; |
| 4207 | |
| 4208 | if (max_bufsize - used < convbytes) |
| 4209 | string_overflow (); |
| 4210 | bufsize = used + convbytes; |
| 4211 | bufsize = bufsize < max_bufsize / 2 ? bufsize * 2 : max_bufsize; |
| 4212 | |
| 4213 | if (buf == initial_buffer) |
| 4214 | { |
| 4215 | buf = xmalloc_atomic (bufsize); |
| 4216 | memcpy (buf, initial_buffer, used); |
| 4217 | } |
| 4218 | else |
| 4219 | { |
| 4220 | buf = xrealloc (buf, bufsize); |
| 4221 | } |
| 4222 | |
| 4223 | p = buf + used; |
| 4224 | } |
| 4225 | |
| 4226 | format = format0; |
| 4227 | n = n0; |
| 4228 | } |
| 4229 | |
| 4230 | if (bufsize < p - buf) |
| 4231 | emacs_abort (); |
| 4232 | |
| 4233 | if (maybe_combine_byte) |
| 4234 | nchars = multibyte_chars_in_text ((unsigned char *) buf, p - buf); |
| 4235 | val = make_specified_string (buf, nchars, p - buf, multibyte); |
| 4236 | |
| 4237 | /* If we allocated BUF with malloc, free it too. */ |
| 4238 | SAFE_FREE (); |
| 4239 | |
| 4240 | /* If the format string has text properties, or any of the string |
| 4241 | arguments has text properties, set up text properties of the |
| 4242 | result string. */ |
| 4243 | |
| 4244 | if (string_intervals (args[0]) || arg_intervals) |
| 4245 | { |
| 4246 | Lisp_Object len, new_len, props; |
| 4247 | struct gcpro gcpro1; |
| 4248 | |
| 4249 | /* Add text properties from the format string. */ |
| 4250 | len = make_number (SCHARS (args[0])); |
| 4251 | props = text_property_list (args[0], make_number (0), len, Qnil); |
| 4252 | GCPRO1 (props); |
| 4253 | |
| 4254 | if (CONSP (props)) |
| 4255 | { |
| 4256 | ptrdiff_t bytepos = 0, position = 0, translated = 0; |
| 4257 | ptrdiff_t argn = 1; |
| 4258 | Lisp_Object list; |
| 4259 | |
| 4260 | /* Adjust the bounds of each text property |
| 4261 | to the proper start and end in the output string. */ |
| 4262 | |
| 4263 | /* Put the positions in PROPS in increasing order, so that |
| 4264 | we can do (effectively) one scan through the position |
| 4265 | space of the format string. */ |
| 4266 | props = Fnreverse (props); |
| 4267 | |
| 4268 | /* BYTEPOS is the byte position in the format string, |
| 4269 | POSITION is the untranslated char position in it, |
| 4270 | TRANSLATED is the translated char position in BUF, |
| 4271 | and ARGN is the number of the next arg we will come to. */ |
| 4272 | for (list = props; CONSP (list); list = XCDR (list)) |
| 4273 | { |
| 4274 | Lisp_Object item; |
| 4275 | ptrdiff_t pos; |
| 4276 | |
| 4277 | item = XCAR (list); |
| 4278 | |
| 4279 | /* First adjust the property start position. */ |
| 4280 | pos = XINT (XCAR (item)); |
| 4281 | |
| 4282 | /* Advance BYTEPOS, POSITION, TRANSLATED and ARGN |
| 4283 | up to this position. */ |
| 4284 | for (; position < pos; bytepos++) |
| 4285 | { |
| 4286 | if (! discarded[bytepos]) |
| 4287 | position++, translated++; |
| 4288 | else if (discarded[bytepos] == 1) |
| 4289 | { |
| 4290 | position++; |
| 4291 | if (translated == info[argn].start) |
| 4292 | { |
| 4293 | translated += info[argn].end - info[argn].start; |
| 4294 | argn++; |
| 4295 | } |
| 4296 | } |
| 4297 | } |
| 4298 | |
| 4299 | XSETCAR (item, make_number (translated)); |
| 4300 | |
| 4301 | /* Likewise adjust the property end position. */ |
| 4302 | pos = XINT (XCAR (XCDR (item))); |
| 4303 | |
| 4304 | for (; position < pos; bytepos++) |
| 4305 | { |
| 4306 | if (! discarded[bytepos]) |
| 4307 | position++, translated++; |
| 4308 | else if (discarded[bytepos] == 1) |
| 4309 | { |
| 4310 | position++; |
| 4311 | if (translated == info[argn].start) |
| 4312 | { |
| 4313 | translated += info[argn].end - info[argn].start; |
| 4314 | argn++; |
| 4315 | } |
| 4316 | } |
| 4317 | } |
| 4318 | |
| 4319 | XSETCAR (XCDR (item), make_number (translated)); |
| 4320 | } |
| 4321 | |
| 4322 | add_text_properties_from_list (val, props, make_number (0)); |
| 4323 | } |
| 4324 | |
| 4325 | /* Add text properties from arguments. */ |
| 4326 | if (arg_intervals) |
| 4327 | for (n = 1; n < nargs; ++n) |
| 4328 | if (info[n].intervals) |
| 4329 | { |
| 4330 | len = make_number (SCHARS (args[n])); |
| 4331 | new_len = make_number (info[n].end - info[n].start); |
| 4332 | props = text_property_list (args[n], make_number (0), len, Qnil); |
| 4333 | props = extend_property_ranges (props, new_len); |
| 4334 | /* If successive arguments have properties, be sure that |
| 4335 | the value of `composition' property be the copy. */ |
| 4336 | if (n > 1 && info[n - 1].end) |
| 4337 | make_composition_value_copy (props); |
| 4338 | add_text_properties_from_list (val, props, |
| 4339 | make_number (info[n].start)); |
| 4340 | } |
| 4341 | |
| 4342 | UNGCPRO; |
| 4343 | } |
| 4344 | |
| 4345 | return val; |
| 4346 | } |
| 4347 | |
| 4348 | Lisp_Object |
| 4349 | format2 (const char *string1, Lisp_Object arg0, Lisp_Object arg1) |
| 4350 | { |
| 4351 | Lisp_Object args[3]; |
| 4352 | args[0] = build_string (string1); |
| 4353 | args[1] = arg0; |
| 4354 | args[2] = arg1; |
| 4355 | return Fformat (3, args); |
| 4356 | } |
| 4357 | \f |
| 4358 | DEFUN ("char-equal", Fchar_equal, Schar_equal, 2, 2, 0, |
| 4359 | doc: /* Return t if two characters match, optionally ignoring case. |
| 4360 | Both arguments must be characters (i.e. integers). |
| 4361 | Case is ignored if `case-fold-search' is non-nil in the current buffer. */) |
| 4362 | (register Lisp_Object c1, Lisp_Object c2) |
| 4363 | { |
| 4364 | int i1, i2; |
| 4365 | /* Check they're chars, not just integers, otherwise we could get array |
| 4366 | bounds violations in downcase. */ |
| 4367 | CHECK_CHARACTER (c1); |
| 4368 | CHECK_CHARACTER (c2); |
| 4369 | |
| 4370 | if (XINT (c1) == XINT (c2)) |
| 4371 | return Qt; |
| 4372 | if (NILP (BVAR (current_buffer, case_fold_search))) |
| 4373 | return Qnil; |
| 4374 | |
| 4375 | i1 = XFASTINT (c1); |
| 4376 | i2 = XFASTINT (c2); |
| 4377 | |
| 4378 | /* FIXME: It is possible to compare multibyte characters even when |
| 4379 | the current buffer is unibyte. Unfortunately this is ambiguous |
| 4380 | for characters between 128 and 255, as they could be either |
| 4381 | eight-bit raw bytes or Latin-1 characters. Assume the former for |
| 4382 | now. See Bug#17011, and also see casefiddle.c's casify_object, |
| 4383 | which has a similar problem. */ |
| 4384 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
| 4385 | { |
| 4386 | if (SINGLE_BYTE_CHAR_P (i1)) |
| 4387 | i1 = UNIBYTE_TO_CHAR (i1); |
| 4388 | if (SINGLE_BYTE_CHAR_P (i2)) |
| 4389 | i2 = UNIBYTE_TO_CHAR (i2); |
| 4390 | } |
| 4391 | |
| 4392 | return (downcase (i1) == downcase (i2) ? Qt : Qnil); |
| 4393 | } |
| 4394 | \f |
| 4395 | /* Transpose the markers in two regions of the current buffer, and |
| 4396 | adjust the ones between them if necessary (i.e.: if the regions |
| 4397 | differ in size). |
| 4398 | |
| 4399 | START1, END1 are the character positions of the first region. |
| 4400 | START1_BYTE, END1_BYTE are the byte positions. |
| 4401 | START2, END2 are the character positions of the second region. |
| 4402 | START2_BYTE, END2_BYTE are the byte positions. |
| 4403 | |
| 4404 | Traverses the entire marker list of the buffer to do so, adding an |
| 4405 | appropriate amount to some, subtracting from some, and leaving the |
| 4406 | rest untouched. Most of this is copied from adjust_markers in insdel.c. |
| 4407 | |
| 4408 | It's the caller's job to ensure that START1 <= END1 <= START2 <= END2. */ |
| 4409 | |
| 4410 | static void |
| 4411 | transpose_markers (ptrdiff_t start1, ptrdiff_t end1, |
| 4412 | ptrdiff_t start2, ptrdiff_t end2, |
| 4413 | ptrdiff_t start1_byte, ptrdiff_t end1_byte, |
| 4414 | ptrdiff_t start2_byte, ptrdiff_t end2_byte) |
| 4415 | { |
| 4416 | register ptrdiff_t amt1, amt1_byte, amt2, amt2_byte, diff, diff_byte, mpos; |
| 4417 | register struct Lisp_Marker *marker; |
| 4418 | |
| 4419 | /* Update point as if it were a marker. */ |
| 4420 | if (PT < start1) |
| 4421 | ; |
| 4422 | else if (PT < end1) |
| 4423 | TEMP_SET_PT_BOTH (PT + (end2 - end1), |
| 4424 | PT_BYTE + (end2_byte - end1_byte)); |
| 4425 | else if (PT < start2) |
| 4426 | TEMP_SET_PT_BOTH (PT + (end2 - start2) - (end1 - start1), |
| 4427 | (PT_BYTE + (end2_byte - start2_byte) |
| 4428 | - (end1_byte - start1_byte))); |
| 4429 | else if (PT < end2) |
| 4430 | TEMP_SET_PT_BOTH (PT - (start2 - start1), |
| 4431 | PT_BYTE - (start2_byte - start1_byte)); |
| 4432 | |
| 4433 | /* We used to adjust the endpoints here to account for the gap, but that |
| 4434 | isn't good enough. Even if we assume the caller has tried to move the |
| 4435 | gap out of our way, it might still be at start1 exactly, for example; |
| 4436 | and that places it `inside' the interval, for our purposes. The amount |
| 4437 | of adjustment is nontrivial if there's a `denormalized' marker whose |
| 4438 | position is between GPT and GPT + GAP_SIZE, so it's simpler to leave |
| 4439 | the dirty work to Fmarker_position, below. */ |
| 4440 | |
| 4441 | /* The difference between the region's lengths */ |
| 4442 | diff = (end2 - start2) - (end1 - start1); |
| 4443 | diff_byte = (end2_byte - start2_byte) - (end1_byte - start1_byte); |
| 4444 | |
| 4445 | /* For shifting each marker in a region by the length of the other |
| 4446 | region plus the distance between the regions. */ |
| 4447 | amt1 = (end2 - start2) + (start2 - end1); |
| 4448 | amt2 = (end1 - start1) + (start2 - end1); |
| 4449 | amt1_byte = (end2_byte - start2_byte) + (start2_byte - end1_byte); |
| 4450 | amt2_byte = (end1_byte - start1_byte) + (start2_byte - end1_byte); |
| 4451 | |
| 4452 | for (marker = BUF_MARKERS (current_buffer); marker; marker = marker->next) |
| 4453 | { |
| 4454 | mpos = marker->bytepos; |
| 4455 | if (mpos >= start1_byte && mpos < end2_byte) |
| 4456 | { |
| 4457 | if (mpos < end1_byte) |
| 4458 | mpos += amt1_byte; |
| 4459 | else if (mpos < start2_byte) |
| 4460 | mpos += diff_byte; |
| 4461 | else |
| 4462 | mpos -= amt2_byte; |
| 4463 | marker->bytepos = mpos; |
| 4464 | } |
| 4465 | mpos = marker->charpos; |
| 4466 | if (mpos >= start1 && mpos < end2) |
| 4467 | { |
| 4468 | if (mpos < end1) |
| 4469 | mpos += amt1; |
| 4470 | else if (mpos < start2) |
| 4471 | mpos += diff; |
| 4472 | else |
| 4473 | mpos -= amt2; |
| 4474 | } |
| 4475 | marker->charpos = mpos; |
| 4476 | } |
| 4477 | } |
| 4478 | |
| 4479 | DEFUN ("transpose-regions", Ftranspose_regions, Stranspose_regions, 4, 5, 0, |
| 4480 | doc: /* Transpose region STARTR1 to ENDR1 with STARTR2 to ENDR2. |
| 4481 | The regions should not be overlapping, because the size of the buffer is |
| 4482 | never changed in a transposition. |
| 4483 | |
| 4484 | Optional fifth arg LEAVE-MARKERS, if non-nil, means don't update |
| 4485 | any markers that happen to be located in the regions. |
| 4486 | |
| 4487 | Transposing beyond buffer boundaries is an error. */) |
| 4488 | (Lisp_Object startr1, Lisp_Object endr1, Lisp_Object startr2, Lisp_Object endr2, Lisp_Object leave_markers) |
| 4489 | { |
| 4490 | register ptrdiff_t start1, end1, start2, end2; |
| 4491 | ptrdiff_t start1_byte, start2_byte, len1_byte, len2_byte, end2_byte; |
| 4492 | ptrdiff_t gap, len1, len_mid, len2; |
| 4493 | unsigned char *start1_addr, *start2_addr, *temp; |
| 4494 | |
| 4495 | INTERVAL cur_intv, tmp_interval1, tmp_interval_mid, tmp_interval2, tmp_interval3; |
| 4496 | Lisp_Object buf; |
| 4497 | |
| 4498 | XSETBUFFER (buf, current_buffer); |
| 4499 | cur_intv = buffer_intervals (current_buffer); |
| 4500 | |
| 4501 | validate_region (&startr1, &endr1); |
| 4502 | validate_region (&startr2, &endr2); |
| 4503 | |
| 4504 | start1 = XFASTINT (startr1); |
| 4505 | end1 = XFASTINT (endr1); |
| 4506 | start2 = XFASTINT (startr2); |
| 4507 | end2 = XFASTINT (endr2); |
| 4508 | gap = GPT; |
| 4509 | |
| 4510 | /* Swap the regions if they're reversed. */ |
| 4511 | if (start2 < end1) |
| 4512 | { |
| 4513 | register ptrdiff_t glumph = start1; |
| 4514 | start1 = start2; |
| 4515 | start2 = glumph; |
| 4516 | glumph = end1; |
| 4517 | end1 = end2; |
| 4518 | end2 = glumph; |
| 4519 | } |
| 4520 | |
| 4521 | len1 = end1 - start1; |
| 4522 | len2 = end2 - start2; |
| 4523 | |
| 4524 | if (start2 < end1) |
| 4525 | error ("Transposed regions overlap"); |
| 4526 | /* Nothing to change for adjacent regions with one being empty */ |
| 4527 | else if ((start1 == end1 || start2 == end2) && end1 == start2) |
| 4528 | return Qnil; |
| 4529 | |
| 4530 | /* The possibilities are: |
| 4531 | 1. Adjacent (contiguous) regions, or separate but equal regions |
| 4532 | (no, really equal, in this case!), or |
| 4533 | 2. Separate regions of unequal size. |
| 4534 | |
| 4535 | The worst case is usually No. 2. It means that (aside from |
| 4536 | potential need for getting the gap out of the way), there also |
| 4537 | needs to be a shifting of the text between the two regions. So |
| 4538 | if they are spread far apart, we are that much slower... sigh. */ |
| 4539 | |
| 4540 | /* It must be pointed out that the really studly thing to do would |
| 4541 | be not to move the gap at all, but to leave it in place and work |
| 4542 | around it if necessary. This would be extremely efficient, |
| 4543 | especially considering that people are likely to do |
| 4544 | transpositions near where they are working interactively, which |
| 4545 | is exactly where the gap would be found. However, such code |
| 4546 | would be much harder to write and to read. So, if you are |
| 4547 | reading this comment and are feeling squirrely, by all means have |
| 4548 | a go! I just didn't feel like doing it, so I will simply move |
| 4549 | the gap the minimum distance to get it out of the way, and then |
| 4550 | deal with an unbroken array. */ |
| 4551 | |
| 4552 | start1_byte = CHAR_TO_BYTE (start1); |
| 4553 | end2_byte = CHAR_TO_BYTE (end2); |
| 4554 | |
| 4555 | /* Make sure the gap won't interfere, by moving it out of the text |
| 4556 | we will operate on. */ |
| 4557 | if (start1 < gap && gap < end2) |
| 4558 | { |
| 4559 | if (gap - start1 < end2 - gap) |
| 4560 | move_gap_both (start1, start1_byte); |
| 4561 | else |
| 4562 | move_gap_both (end2, end2_byte); |
| 4563 | } |
| 4564 | |
| 4565 | start2_byte = CHAR_TO_BYTE (start2); |
| 4566 | len1_byte = CHAR_TO_BYTE (end1) - start1_byte; |
| 4567 | len2_byte = end2_byte - start2_byte; |
| 4568 | |
| 4569 | #ifdef BYTE_COMBINING_DEBUG |
| 4570 | if (end1 == start2) |
| 4571 | { |
| 4572 | if (count_combining_before (BYTE_POS_ADDR (start2_byte), |
| 4573 | len2_byte, start1, start1_byte) |
| 4574 | || count_combining_before (BYTE_POS_ADDR (start1_byte), |
| 4575 | len1_byte, end2, start2_byte + len2_byte) |
| 4576 | || count_combining_after (BYTE_POS_ADDR (start1_byte), |
| 4577 | len1_byte, end2, start2_byte + len2_byte)) |
| 4578 | emacs_abort (); |
| 4579 | } |
| 4580 | else |
| 4581 | { |
| 4582 | if (count_combining_before (BYTE_POS_ADDR (start2_byte), |
| 4583 | len2_byte, start1, start1_byte) |
| 4584 | || count_combining_before (BYTE_POS_ADDR (start1_byte), |
| 4585 | len1_byte, start2, start2_byte) |
| 4586 | || count_combining_after (BYTE_POS_ADDR (start2_byte), |
| 4587 | len2_byte, end1, start1_byte + len1_byte) |
| 4588 | || count_combining_after (BYTE_POS_ADDR (start1_byte), |
| 4589 | len1_byte, end2, start2_byte + len2_byte)) |
| 4590 | emacs_abort (); |
| 4591 | } |
| 4592 | #endif |
| 4593 | |
| 4594 | /* Hmmm... how about checking to see if the gap is large |
| 4595 | enough to use as the temporary storage? That would avoid an |
| 4596 | allocation... interesting. Later, don't fool with it now. */ |
| 4597 | |
| 4598 | /* Working without memmove, for portability (sigh), so must be |
| 4599 | careful of overlapping subsections of the array... */ |
| 4600 | |
| 4601 | if (end1 == start2) /* adjacent regions */ |
| 4602 | { |
| 4603 | modify_text (start1, end2); |
| 4604 | record_change (start1, len1 + len2); |
| 4605 | |
| 4606 | tmp_interval1 = copy_intervals (cur_intv, start1, len1); |
| 4607 | tmp_interval2 = copy_intervals (cur_intv, start2, len2); |
| 4608 | /* Don't use Fset_text_properties: that can cause GC, which can |
| 4609 | clobber objects stored in the tmp_intervals. */ |
| 4610 | tmp_interval3 = validate_interval_range (buf, &startr1, &endr2, 0); |
| 4611 | if (tmp_interval3) |
| 4612 | set_text_properties_1 (startr1, endr2, Qnil, buf, tmp_interval3); |
| 4613 | |
| 4614 | /* First region smaller than second. */ |
| 4615 | if (len1_byte < len2_byte) |
| 4616 | { |
| 4617 | USE_SAFE_ALLOCA; |
| 4618 | |
| 4619 | temp = SAFE_ALLOCA (len2_byte); |
| 4620 | |
| 4621 | /* Don't precompute these addresses. We have to compute them |
| 4622 | at the last minute, because the relocating allocator might |
| 4623 | have moved the buffer around during the xmalloc. */ |
| 4624 | start1_addr = BYTE_POS_ADDR (start1_byte); |
| 4625 | start2_addr = BYTE_POS_ADDR (start2_byte); |
| 4626 | |
| 4627 | memcpy (temp, start2_addr, len2_byte); |
| 4628 | memcpy (start1_addr + len2_byte, start1_addr, len1_byte); |
| 4629 | memcpy (start1_addr, temp, len2_byte); |
| 4630 | SAFE_FREE (); |
| 4631 | } |
| 4632 | else |
| 4633 | /* First region not smaller than second. */ |
| 4634 | { |
| 4635 | USE_SAFE_ALLOCA; |
| 4636 | |
| 4637 | temp = SAFE_ALLOCA (len1_byte); |
| 4638 | start1_addr = BYTE_POS_ADDR (start1_byte); |
| 4639 | start2_addr = BYTE_POS_ADDR (start2_byte); |
| 4640 | memcpy (temp, start1_addr, len1_byte); |
| 4641 | memcpy (start1_addr, start2_addr, len2_byte); |
| 4642 | memcpy (start1_addr + len2_byte, temp, len1_byte); |
| 4643 | SAFE_FREE (); |
| 4644 | } |
| 4645 | graft_intervals_into_buffer (tmp_interval1, start1 + len2, |
| 4646 | len1, current_buffer, 0); |
| 4647 | graft_intervals_into_buffer (tmp_interval2, start1, |
| 4648 | len2, current_buffer, 0); |
| 4649 | update_compositions (start1, start1 + len2, CHECK_BORDER); |
| 4650 | update_compositions (start1 + len2, end2, CHECK_TAIL); |
| 4651 | } |
| 4652 | /* Non-adjacent regions, because end1 != start2, bleagh... */ |
| 4653 | else |
| 4654 | { |
| 4655 | len_mid = start2_byte - (start1_byte + len1_byte); |
| 4656 | |
| 4657 | if (len1_byte == len2_byte) |
| 4658 | /* Regions are same size, though, how nice. */ |
| 4659 | { |
| 4660 | USE_SAFE_ALLOCA; |
| 4661 | |
| 4662 | modify_text (start1, end1); |
| 4663 | modify_text (start2, end2); |
| 4664 | record_change (start1, len1); |
| 4665 | record_change (start2, len2); |
| 4666 | tmp_interval1 = copy_intervals (cur_intv, start1, len1); |
| 4667 | tmp_interval2 = copy_intervals (cur_intv, start2, len2); |
| 4668 | |
| 4669 | tmp_interval3 = validate_interval_range (buf, &startr1, &endr1, 0); |
| 4670 | if (tmp_interval3) |
| 4671 | set_text_properties_1 (startr1, endr1, Qnil, buf, tmp_interval3); |
| 4672 | |
| 4673 | tmp_interval3 = validate_interval_range (buf, &startr2, &endr2, 0); |
| 4674 | if (tmp_interval3) |
| 4675 | set_text_properties_1 (startr2, endr2, Qnil, buf, tmp_interval3); |
| 4676 | |
| 4677 | temp = SAFE_ALLOCA (len1_byte); |
| 4678 | start1_addr = BYTE_POS_ADDR (start1_byte); |
| 4679 | start2_addr = BYTE_POS_ADDR (start2_byte); |
| 4680 | memcpy (temp, start1_addr, len1_byte); |
| 4681 | memcpy (start1_addr, start2_addr, len2_byte); |
| 4682 | memcpy (start2_addr, temp, len1_byte); |
| 4683 | SAFE_FREE (); |
| 4684 | |
| 4685 | graft_intervals_into_buffer (tmp_interval1, start2, |
| 4686 | len1, current_buffer, 0); |
| 4687 | graft_intervals_into_buffer (tmp_interval2, start1, |
| 4688 | len2, current_buffer, 0); |
| 4689 | } |
| 4690 | |
| 4691 | else if (len1_byte < len2_byte) /* Second region larger than first */ |
| 4692 | /* Non-adjacent & unequal size, area between must also be shifted. */ |
| 4693 | { |
| 4694 | USE_SAFE_ALLOCA; |
| 4695 | |
| 4696 | modify_text (start1, end2); |
| 4697 | record_change (start1, (end2 - start1)); |
| 4698 | tmp_interval1 = copy_intervals (cur_intv, start1, len1); |
| 4699 | tmp_interval_mid = copy_intervals (cur_intv, end1, len_mid); |
| 4700 | tmp_interval2 = copy_intervals (cur_intv, start2, len2); |
| 4701 | |
| 4702 | tmp_interval3 = validate_interval_range (buf, &startr1, &endr2, 0); |
| 4703 | if (tmp_interval3) |
| 4704 | set_text_properties_1 (startr1, endr2, Qnil, buf, tmp_interval3); |
| 4705 | |
| 4706 | /* holds region 2 */ |
| 4707 | temp = SAFE_ALLOCA (len2_byte); |
| 4708 | start1_addr = BYTE_POS_ADDR (start1_byte); |
| 4709 | start2_addr = BYTE_POS_ADDR (start2_byte); |
| 4710 | memcpy (temp, start2_addr, len2_byte); |
| 4711 | memcpy (start1_addr + len_mid + len2_byte, start1_addr, len1_byte); |
| 4712 | memmove (start1_addr + len2_byte, start1_addr + len1_byte, len_mid); |
| 4713 | memcpy (start1_addr, temp, len2_byte); |
| 4714 | SAFE_FREE (); |
| 4715 | |
| 4716 | graft_intervals_into_buffer (tmp_interval1, end2 - len1, |
| 4717 | len1, current_buffer, 0); |
| 4718 | graft_intervals_into_buffer (tmp_interval_mid, start1 + len2, |
| 4719 | len_mid, current_buffer, 0); |
| 4720 | graft_intervals_into_buffer (tmp_interval2, start1, |
| 4721 | len2, current_buffer, 0); |
| 4722 | } |
| 4723 | else |
| 4724 | /* Second region smaller than first. */ |
| 4725 | { |
| 4726 | USE_SAFE_ALLOCA; |
| 4727 | |
| 4728 | record_change (start1, (end2 - start1)); |
| 4729 | modify_text (start1, end2); |
| 4730 | |
| 4731 | tmp_interval1 = copy_intervals (cur_intv, start1, len1); |
| 4732 | tmp_interval_mid = copy_intervals (cur_intv, end1, len_mid); |
| 4733 | tmp_interval2 = copy_intervals (cur_intv, start2, len2); |
| 4734 | |
| 4735 | tmp_interval3 = validate_interval_range (buf, &startr1, &endr2, 0); |
| 4736 | if (tmp_interval3) |
| 4737 | set_text_properties_1 (startr1, endr2, Qnil, buf, tmp_interval3); |
| 4738 | |
| 4739 | /* holds region 1 */ |
| 4740 | temp = SAFE_ALLOCA (len1_byte); |
| 4741 | start1_addr = BYTE_POS_ADDR (start1_byte); |
| 4742 | start2_addr = BYTE_POS_ADDR (start2_byte); |
| 4743 | memcpy (temp, start1_addr, len1_byte); |
| 4744 | memcpy (start1_addr, start2_addr, len2_byte); |
| 4745 | memcpy (start1_addr + len2_byte, start1_addr + len1_byte, len_mid); |
| 4746 | memcpy (start1_addr + len2_byte + len_mid, temp, len1_byte); |
| 4747 | SAFE_FREE (); |
| 4748 | |
| 4749 | graft_intervals_into_buffer (tmp_interval1, end2 - len1, |
| 4750 | len1, current_buffer, 0); |
| 4751 | graft_intervals_into_buffer (tmp_interval_mid, start1 + len2, |
| 4752 | len_mid, current_buffer, 0); |
| 4753 | graft_intervals_into_buffer (tmp_interval2, start1, |
| 4754 | len2, current_buffer, 0); |
| 4755 | } |
| 4756 | |
| 4757 | update_compositions (start1, start1 + len2, CHECK_BORDER); |
| 4758 | update_compositions (end2 - len1, end2, CHECK_BORDER); |
| 4759 | } |
| 4760 | |
| 4761 | /* When doing multiple transpositions, it might be nice |
| 4762 | to optimize this. Perhaps the markers in any one buffer |
| 4763 | should be organized in some sorted data tree. */ |
| 4764 | if (NILP (leave_markers)) |
| 4765 | { |
| 4766 | transpose_markers (start1, end1, start2, end2, |
| 4767 | start1_byte, start1_byte + len1_byte, |
| 4768 | start2_byte, start2_byte + len2_byte); |
| 4769 | fix_start_end_in_overlays (start1, end2); |
| 4770 | } |
| 4771 | |
| 4772 | signal_after_change (start1, end2 - start1, end2 - start1); |
| 4773 | return Qnil; |
| 4774 | } |
| 4775 | |
| 4776 | \f |
| 4777 | void |
| 4778 | syms_of_editfns (void) |
| 4779 | { |
| 4780 | #include "editfns.x" |
| 4781 | |
| 4782 | DEFSYM (Qbuffer_access_fontify_functions, "buffer-access-fontify-functions"); |
| 4783 | |
| 4784 | DEFVAR_LISP ("inhibit-field-text-motion", Vinhibit_field_text_motion, |
| 4785 | doc: /* Non-nil means text motion commands don't notice fields. */); |
| 4786 | Vinhibit_field_text_motion = Qnil; |
| 4787 | |
| 4788 | DEFVAR_LISP ("buffer-access-fontify-functions", |
| 4789 | Vbuffer_access_fontify_functions, |
| 4790 | doc: /* List of functions called by `buffer-substring' to fontify if necessary. |
| 4791 | Each function is called with two arguments which specify the range |
| 4792 | of the buffer being accessed. */); |
| 4793 | Vbuffer_access_fontify_functions = Qnil; |
| 4794 | |
| 4795 | { |
| 4796 | Lisp_Object obuf; |
| 4797 | obuf = Fcurrent_buffer (); |
| 4798 | /* Do this here, because init_buffer_once is too early--it won't work. */ |
| 4799 | Fset_buffer (Vprin1_to_string_buffer); |
| 4800 | /* Make sure buffer-access-fontify-functions is nil in this buffer. */ |
| 4801 | Fset (Fmake_local_variable (intern_c_string ("buffer-access-fontify-functions")), |
| 4802 | Qnil); |
| 4803 | Fset_buffer (obuf); |
| 4804 | } |
| 4805 | |
| 4806 | DEFVAR_LISP ("buffer-access-fontified-property", |
| 4807 | Vbuffer_access_fontified_property, |
| 4808 | doc: /* Property which (if non-nil) indicates text has been fontified. |
| 4809 | `buffer-substring' need not call the `buffer-access-fontify-functions' |
| 4810 | functions if all the text being accessed has this property. */); |
| 4811 | Vbuffer_access_fontified_property = Qnil; |
| 4812 | |
| 4813 | DEFVAR_LISP ("system-name", Vsystem_name, |
| 4814 | doc: /* The host name of the machine Emacs is running on. */); |
| 4815 | |
| 4816 | DEFVAR_LISP ("user-full-name", Vuser_full_name, |
| 4817 | doc: /* The full name of the user logged in. */); |
| 4818 | |
| 4819 | DEFVAR_LISP ("user-login-name", Vuser_login_name, |
| 4820 | doc: /* The user's name, taken from environment variables if possible. */); |
| 4821 | |
| 4822 | DEFVAR_LISP ("user-real-login-name", Vuser_real_login_name, |
| 4823 | doc: /* The user's name, based upon the real uid only. */); |
| 4824 | |
| 4825 | DEFVAR_LISP ("operating-system-release", Voperating_system_release, |
| 4826 | doc: /* The release of the operating system Emacs is running on. */); |
| 4827 | |
| 4828 | DEFSYM (Qfield, "field"); |
| 4829 | DEFSYM (Qboundary, "boundary"); |
| 4830 | } |