| 1 | /* Copyright (C) 1995-1999, 2000, 2001, 2002, 2003, 2004, 2006, 2008, |
| 2 | * 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc. |
| 3 | * |
| 4 | * This library is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU Lesser General Public License |
| 6 | * as published by the Free Software Foundation; either version 3 of |
| 7 | * the License, or (at your option) any later version. |
| 8 | * |
| 9 | * This library is distributed in the hope that it will be useful, but |
| 10 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | * Lesser General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU Lesser General Public |
| 15 | * License along with this library; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 17 | * 02110-1301 USA |
| 18 | */ |
| 19 | |
| 20 | |
| 21 | \f |
| 22 | #ifdef HAVE_CONFIG_H |
| 23 | # include <config.h> |
| 24 | #endif |
| 25 | |
| 26 | #include <errno.h> |
| 27 | #include <iconv.h> |
| 28 | #include <stdio.h> |
| 29 | #include <assert.h> |
| 30 | |
| 31 | #include <uniconv.h> |
| 32 | #include <unictype.h> |
| 33 | |
| 34 | #include "libguile/_scm.h" |
| 35 | #include "libguile/chars.h" |
| 36 | #include "libguile/continuations.h" |
| 37 | #include "libguile/smob.h" |
| 38 | #include "libguile/control.h" |
| 39 | #include "libguile/eval.h" |
| 40 | #include "libguile/macros.h" |
| 41 | #include "libguile/procprop.h" |
| 42 | #include "libguile/read.h" |
| 43 | #include "libguile/programs.h" |
| 44 | #include "libguile/alist.h" |
| 45 | #include "libguile/struct.h" |
| 46 | #include "libguile/ports.h" |
| 47 | #include "libguile/ports-internal.h" |
| 48 | #include "libguile/root.h" |
| 49 | #include "libguile/strings.h" |
| 50 | #include "libguile/strports.h" |
| 51 | #include "libguile/vectors.h" |
| 52 | #include "libguile/numbers.h" |
| 53 | #include "libguile/vm.h" |
| 54 | |
| 55 | #include "libguile/validate.h" |
| 56 | #include "libguile/print.h" |
| 57 | |
| 58 | #include "libguile/private-options.h" |
| 59 | |
| 60 | \f |
| 61 | |
| 62 | /* Character printers. */ |
| 63 | |
| 64 | #define PORT_CONVERSION_HANDLER(port) \ |
| 65 | SCM_PTAB_ENTRY (port)->ilseq_handler |
| 66 | |
| 67 | static size_t display_string (const void *, int, size_t, SCM, |
| 68 | scm_t_string_failed_conversion_handler); |
| 69 | |
| 70 | static int display_character (scm_t_wchar, SCM, |
| 71 | scm_t_string_failed_conversion_handler); |
| 72 | |
| 73 | static void write_character (scm_t_wchar, SCM, int); |
| 74 | |
| 75 | static void write_character_escaped (scm_t_wchar, int, SCM); |
| 76 | |
| 77 | \f |
| 78 | |
| 79 | /* {Names of immediate symbols} |
| 80 | * |
| 81 | * This table must agree with the declarations in scm.h: {Immediate Symbols}. |
| 82 | */ |
| 83 | |
| 84 | /* This table must agree with the list of flags in tags.h. */ |
| 85 | static const char *iflagnames[] = |
| 86 | { |
| 87 | "#f", |
| 88 | "#nil", /* Elisp nil value. Should print from elisp as symbol `nil'. */ |
| 89 | "#<XXX UNUSED LISP FALSE -- DO NOT USE -- SHOULD NEVER BE SEEN XXX>", |
| 90 | "()", |
| 91 | "#t", |
| 92 | "#<XXX UNUSED BOOLEAN 0 -- DO NOT USE -- SHOULD NEVER BE SEEN XXX>", |
| 93 | "#<XXX UNUSED BOOLEAN 1 -- DO NOT USE -- SHOULD NEVER BE SEEN XXX>", |
| 94 | "#<XXX UNUSED BOOLEAN 2 -- DO NOT USE -- SHOULD NEVER BE SEEN XXX>", |
| 95 | "#<unspecified>", |
| 96 | "#<undefined>", |
| 97 | "#<eof>", |
| 98 | |
| 99 | /* Unbound slot marker for GOOPS. For internal use in GOOPS only. */ |
| 100 | "#<unbound>", |
| 101 | }; |
| 102 | |
| 103 | SCM_SYMBOL (sym_reader, "reader"); |
| 104 | |
| 105 | scm_t_option scm_print_opts[] = { |
| 106 | { SCM_OPTION_SCM, "highlight-prefix", (scm_t_bits)SCM_BOOL_F_BITS, |
| 107 | "The string to print before highlighted values." }, |
| 108 | { SCM_OPTION_SCM, "highlight-suffix", (scm_t_bits)SCM_BOOL_F_BITS, |
| 109 | "The string to print after highlighted values." }, |
| 110 | { SCM_OPTION_SCM, "quote-keywordish-symbols", (scm_t_bits)SCM_BOOL_F_BITS, |
| 111 | "How to print symbols that have a colon as their first or last character. " |
| 112 | "The value '#f' does not quote the colons; '#t' quotes them; " |
| 113 | "'reader' quotes them when the reader option 'keywords' is not '#f'." }, |
| 114 | { SCM_OPTION_BOOLEAN, "escape-newlines", 1, |
| 115 | "Render newlines as \\n when printing using `write'." }, |
| 116 | { 0 }, |
| 117 | }; |
| 118 | |
| 119 | SCM_DEFINE (scm_print_options, "print-options-interface", 0, 1, 0, |
| 120 | (SCM setting), |
| 121 | "Option interface for the print options. Instead of using\n" |
| 122 | "this procedure directly, use the procedures\n" |
| 123 | "@code{print-enable}, @code{print-disable}, @code{print-set!}\n" |
| 124 | "and @code{print-options}.") |
| 125 | #define FUNC_NAME s_scm_print_options |
| 126 | { |
| 127 | SCM ans = scm_options (setting, |
| 128 | scm_print_opts, |
| 129 | FUNC_NAME); |
| 130 | return ans; |
| 131 | } |
| 132 | #undef FUNC_NAME |
| 133 | |
| 134 | \f |
| 135 | /* {Printing of Scheme Objects} |
| 136 | */ |
| 137 | |
| 138 | /* Detection of circular references. |
| 139 | * |
| 140 | * Due to other constraints in the implementation, this code has bad |
| 141 | * time complexity (O (depth * N)), The printer code can be |
| 142 | * rewritten to be O(N). |
| 143 | */ |
| 144 | #define PUSH_REF(pstate, obj) \ |
| 145 | do \ |
| 146 | { \ |
| 147 | PSTATE_STACK_SET (pstate, pstate->top, obj); \ |
| 148 | pstate->top++; \ |
| 149 | if (pstate->top == pstate->ceiling) \ |
| 150 | grow_ref_stack (pstate); \ |
| 151 | } while(0) |
| 152 | |
| 153 | #define ENTER_NESTED_DATA(pstate, obj, label) \ |
| 154 | do \ |
| 155 | { \ |
| 156 | register unsigned long i; \ |
| 157 | for (i = 0; i < pstate->top; ++i) \ |
| 158 | if (scm_is_eq (PSTATE_STACK_REF (pstate, i), (obj))) \ |
| 159 | goto label; \ |
| 160 | if (pstate->fancyp) \ |
| 161 | { \ |
| 162 | if (pstate->top - pstate->list_offset >= pstate->level) \ |
| 163 | { \ |
| 164 | scm_putc_unlocked ('#', port); \ |
| 165 | return; \ |
| 166 | } \ |
| 167 | } \ |
| 168 | PUSH_REF(pstate, obj); \ |
| 169 | } while(0) |
| 170 | |
| 171 | #define EXIT_NESTED_DATA(pstate) \ |
| 172 | do \ |
| 173 | { \ |
| 174 | --pstate->top; \ |
| 175 | PSTATE_STACK_SET (pstate, pstate->top, SCM_UNDEFINED); \ |
| 176 | } \ |
| 177 | while (0) |
| 178 | |
| 179 | SCM scm_print_state_vtable = SCM_BOOL_F; |
| 180 | static SCM print_state_pool = SCM_EOL; |
| 181 | scm_i_pthread_mutex_t print_state_mutex = SCM_I_PTHREAD_MUTEX_INITIALIZER; |
| 182 | |
| 183 | #ifdef GUILE_DEBUG /* Used for debugging purposes */ |
| 184 | |
| 185 | SCM_DEFINE (scm_current_pstate, "current-pstate", 0, 0, 0, |
| 186 | (), |
| 187 | "Return the current-pstate -- the car of the\n" |
| 188 | "@code{print_state_pool}. @code{current-pstate} is only\n" |
| 189 | "included in @code{--enable-guile-debug} builds.") |
| 190 | #define FUNC_NAME s_scm_current_pstate |
| 191 | { |
| 192 | if (!scm_is_null (print_state_pool)) |
| 193 | return SCM_CAR (print_state_pool); |
| 194 | else |
| 195 | return SCM_BOOL_F; |
| 196 | } |
| 197 | #undef FUNC_NAME |
| 198 | |
| 199 | #endif |
| 200 | |
| 201 | #define PSTATE_SIZE 50L |
| 202 | |
| 203 | static SCM |
| 204 | make_print_state (void) |
| 205 | { |
| 206 | SCM print_state |
| 207 | = scm_make_struct (scm_print_state_vtable, SCM_INUM0, SCM_EOL); |
| 208 | scm_print_state *pstate = SCM_PRINT_STATE (print_state); |
| 209 | pstate->ref_vect = scm_c_make_vector (PSTATE_SIZE, SCM_UNDEFINED); |
| 210 | pstate->ceiling = SCM_SIMPLE_VECTOR_LENGTH (pstate->ref_vect); |
| 211 | pstate->highlight_objects = SCM_EOL; |
| 212 | return print_state; |
| 213 | } |
| 214 | |
| 215 | SCM |
| 216 | scm_make_print_state () |
| 217 | { |
| 218 | SCM answer = SCM_BOOL_F; |
| 219 | |
| 220 | /* First try to allocate a print state from the pool */ |
| 221 | scm_i_pthread_mutex_lock (&print_state_mutex); |
| 222 | if (!scm_is_null (print_state_pool)) |
| 223 | { |
| 224 | answer = SCM_CAR (print_state_pool); |
| 225 | print_state_pool = SCM_CDR (print_state_pool); |
| 226 | } |
| 227 | scm_i_pthread_mutex_unlock (&print_state_mutex); |
| 228 | |
| 229 | return scm_is_false (answer) ? make_print_state () : answer; |
| 230 | } |
| 231 | |
| 232 | void |
| 233 | scm_free_print_state (SCM print_state) |
| 234 | { |
| 235 | SCM handle; |
| 236 | scm_print_state *pstate = SCM_PRINT_STATE (print_state); |
| 237 | /* Cleanup before returning print state to pool. |
| 238 | * It is better to do it here. Doing it in scm_prin1 |
| 239 | * would cost more since that function is called much more |
| 240 | * often. |
| 241 | */ |
| 242 | pstate->fancyp = 0; |
| 243 | pstate->revealed = 0; |
| 244 | pstate->highlight_objects = SCM_EOL; |
| 245 | scm_i_pthread_mutex_lock (&print_state_mutex); |
| 246 | handle = scm_cons (print_state, print_state_pool); |
| 247 | print_state_pool = handle; |
| 248 | scm_i_pthread_mutex_unlock (&print_state_mutex); |
| 249 | } |
| 250 | |
| 251 | SCM |
| 252 | scm_i_port_with_print_state (SCM port, SCM print_state) |
| 253 | { |
| 254 | if (SCM_UNBNDP (print_state)) |
| 255 | { |
| 256 | if (SCM_PORT_WITH_PS_P (port)) |
| 257 | return port; |
| 258 | else |
| 259 | print_state = scm_make_print_state (); |
| 260 | /* port does not need to be coerced since it doesn't have ps */ |
| 261 | } |
| 262 | else |
| 263 | port = SCM_COERCE_OUTPORT (port); |
| 264 | SCM_RETURN_NEWSMOB (scm_tc16_port_with_ps, |
| 265 | SCM_UNPACK (scm_cons (port, print_state))); |
| 266 | } |
| 267 | |
| 268 | static void |
| 269 | grow_ref_stack (scm_print_state *pstate) |
| 270 | { |
| 271 | SCM old_vect = pstate->ref_vect; |
| 272 | size_t old_size = SCM_SIMPLE_VECTOR_LENGTH (old_vect); |
| 273 | size_t new_size = 2 * pstate->ceiling; |
| 274 | SCM new_vect = scm_c_make_vector (new_size, SCM_UNDEFINED); |
| 275 | unsigned long int i; |
| 276 | |
| 277 | for (i = 0; i != old_size; ++i) |
| 278 | SCM_SIMPLE_VECTOR_SET (new_vect, i, SCM_SIMPLE_VECTOR_REF (old_vect, i)); |
| 279 | |
| 280 | pstate->ref_vect = new_vect; |
| 281 | pstate->ceiling = new_size; |
| 282 | } |
| 283 | |
| 284 | #define PSTATE_STACK_REF(p,i) SCM_SIMPLE_VECTOR_REF((p)->ref_vect, (i)) |
| 285 | #define PSTATE_STACK_SET(p,i,v) SCM_SIMPLE_VECTOR_SET((p)->ref_vect, (i), (v)) |
| 286 | |
| 287 | static void |
| 288 | print_circref (SCM port, scm_print_state *pstate, SCM ref) |
| 289 | { |
| 290 | register long i; |
| 291 | long self = pstate->top - 1; |
| 292 | i = pstate->top - 1; |
| 293 | if (scm_is_pair (PSTATE_STACK_REF (pstate, i))) |
| 294 | { |
| 295 | while (i > 0) |
| 296 | { |
| 297 | if (!scm_is_pair (PSTATE_STACK_REF (pstate, i-1)) |
| 298 | || !scm_is_eq (SCM_CDR (PSTATE_STACK_REF (pstate, i-1)), |
| 299 | SCM_CDR (PSTATE_STACK_REF (pstate, i)))) |
| 300 | break; |
| 301 | --i; |
| 302 | } |
| 303 | self = i; |
| 304 | } |
| 305 | for (i = pstate->top - 1; 1; --i) |
| 306 | if (scm_is_eq (PSTATE_STACK_REF(pstate, i), ref)) |
| 307 | break; |
| 308 | scm_putc_unlocked ('#', port); |
| 309 | scm_intprint (i - self, 10, port); |
| 310 | scm_putc_unlocked ('#', port); |
| 311 | } |
| 312 | |
| 313 | /* Print the name of a symbol. */ |
| 314 | |
| 315 | static int |
| 316 | quote_keywordish_symbols (void) |
| 317 | { |
| 318 | SCM option = SCM_PRINT_KEYWORD_STYLE; |
| 319 | |
| 320 | if (scm_is_false (option)) |
| 321 | return 0; |
| 322 | if (scm_is_eq (option, sym_reader)) |
| 323 | return scm_is_true (SCM_PACK (SCM_KEYWORD_STYLE)); |
| 324 | return 1; |
| 325 | } |
| 326 | |
| 327 | #define INITIAL_IDENTIFIER_MASK \ |
| 328 | (UC_CATEGORY_MASK_Lu | UC_CATEGORY_MASK_Ll | UC_CATEGORY_MASK_Lt \ |
| 329 | | UC_CATEGORY_MASK_Lm | UC_CATEGORY_MASK_Lo | UC_CATEGORY_MASK_Mn \ |
| 330 | | UC_CATEGORY_MASK_Nl | UC_CATEGORY_MASK_No | UC_CATEGORY_MASK_Pd \ |
| 331 | | UC_CATEGORY_MASK_Pc | UC_CATEGORY_MASK_Po | UC_CATEGORY_MASK_Sc \ |
| 332 | | UC_CATEGORY_MASK_Sm | UC_CATEGORY_MASK_Sk | UC_CATEGORY_MASK_So \ |
| 333 | | UC_CATEGORY_MASK_Co) |
| 334 | |
| 335 | #define SUBSEQUENT_IDENTIFIER_MASK \ |
| 336 | (INITIAL_IDENTIFIER_MASK \ |
| 337 | | UC_CATEGORY_MASK_Nd | UC_CATEGORY_MASK_Mc | UC_CATEGORY_MASK_Me) |
| 338 | |
| 339 | /* FIXME: Cache this information on the symbol, somehow. */ |
| 340 | static int |
| 341 | symbol_has_extended_read_syntax (SCM sym) |
| 342 | { |
| 343 | size_t pos, len = scm_i_symbol_length (sym); |
| 344 | scm_t_wchar c; |
| 345 | |
| 346 | /* The empty symbol. */ |
| 347 | if (len == 0) |
| 348 | return 1; |
| 349 | |
| 350 | c = scm_i_symbol_ref (sym, 0); |
| 351 | |
| 352 | switch (c) |
| 353 | { |
| 354 | case '\'': |
| 355 | case '`': |
| 356 | case ',': |
| 357 | case '"': |
| 358 | case ';': |
| 359 | case '#': |
| 360 | /* Some initial-character constraints. */ |
| 361 | return 1; |
| 362 | |
| 363 | case ':': |
| 364 | /* Symbols that look like keywords. */ |
| 365 | return quote_keywordish_symbols (); |
| 366 | |
| 367 | case '.': |
| 368 | /* Single dot conflicts with dotted-pair notation. */ |
| 369 | if (len == 1) |
| 370 | return 1; |
| 371 | /* Fall through to check numbers. */ |
| 372 | case '+': |
| 373 | case '-': |
| 374 | case '0': |
| 375 | case '1': |
| 376 | case '2': |
| 377 | case '3': |
| 378 | case '4': |
| 379 | case '5': |
| 380 | case '6': |
| 381 | case '7': |
| 382 | case '8': |
| 383 | case '9': |
| 384 | /* Number-ish symbols. Numbers with radixes already caught be # |
| 385 | above. */ |
| 386 | if (scm_is_true (scm_i_string_to_number (scm_symbol_to_string (sym), 10))) |
| 387 | return 1; |
| 388 | break; |
| 389 | |
| 390 | default: |
| 391 | break; |
| 392 | } |
| 393 | |
| 394 | /* Other disallowed first characters. */ |
| 395 | if (!uc_is_general_category_withtable (c, INITIAL_IDENTIFIER_MASK)) |
| 396 | return 1; |
| 397 | |
| 398 | /* Keywords can be identified by trailing colons too. */ |
| 399 | if (scm_i_symbol_ref (sym, len - 1) == ':') |
| 400 | return quote_keywordish_symbols (); |
| 401 | |
| 402 | /* Otherwise, any character that's in the identifier category mask is |
| 403 | fine to pass through as-is, provided it's not one of the ASCII |
| 404 | delimiters like `;'. */ |
| 405 | for (pos = 1; pos < len; pos++) |
| 406 | { |
| 407 | c = scm_i_symbol_ref (sym, pos); |
| 408 | if (!uc_is_general_category_withtable (c, SUBSEQUENT_IDENTIFIER_MASK)) |
| 409 | return 1; |
| 410 | else if (c == '"' || c == ';' || c == '#') |
| 411 | return 1; |
| 412 | } |
| 413 | |
| 414 | return 0; |
| 415 | } |
| 416 | |
| 417 | static void |
| 418 | print_normal_symbol (SCM sym, SCM port) |
| 419 | { |
| 420 | size_t len; |
| 421 | scm_t_string_failed_conversion_handler strategy; |
| 422 | |
| 423 | len = scm_i_symbol_length (sym); |
| 424 | strategy = SCM_PTAB_ENTRY (port)->ilseq_handler; |
| 425 | |
| 426 | if (scm_i_is_narrow_symbol (sym)) |
| 427 | display_string (scm_i_symbol_chars (sym), 1, len, port, strategy); |
| 428 | else |
| 429 | display_string (scm_i_symbol_wide_chars (sym), 0, len, port, strategy); |
| 430 | } |
| 431 | |
| 432 | static void |
| 433 | print_extended_symbol (SCM sym, SCM port) |
| 434 | { |
| 435 | size_t pos, len; |
| 436 | scm_t_string_failed_conversion_handler strategy; |
| 437 | |
| 438 | len = scm_i_symbol_length (sym); |
| 439 | strategy = PORT_CONVERSION_HANDLER (port); |
| 440 | |
| 441 | scm_lfwrite_unlocked ("#{", 2, port); |
| 442 | |
| 443 | for (pos = 0; pos < len; pos++) |
| 444 | { |
| 445 | scm_t_wchar c = scm_i_symbol_ref (sym, pos); |
| 446 | |
| 447 | if (uc_is_general_category_withtable (c, |
| 448 | SUBSEQUENT_IDENTIFIER_MASK |
| 449 | | UC_CATEGORY_MASK_Zs)) |
| 450 | { |
| 451 | if (!display_character (c, port, strategy) |
| 452 | || (c == '\\' && !display_character (c, port, strategy))) |
| 453 | scm_encoding_error ("print_extended_symbol", errno, |
| 454 | "cannot convert to output locale", |
| 455 | port, SCM_MAKE_CHAR (c)); |
| 456 | } |
| 457 | else |
| 458 | { |
| 459 | display_string ("\\x", 1, 2, port, iconveh_question_mark); |
| 460 | scm_intprint (c, 16, port); |
| 461 | display_character (';', port, iconveh_question_mark); |
| 462 | } |
| 463 | } |
| 464 | |
| 465 | scm_lfwrite_unlocked ("}#", 2, port); |
| 466 | } |
| 467 | |
| 468 | /* FIXME: allow R6RS hex escapes instead of #{...}#. */ |
| 469 | static void |
| 470 | print_symbol (SCM sym, SCM port) |
| 471 | { |
| 472 | if (symbol_has_extended_read_syntax (sym)) |
| 473 | print_extended_symbol (sym, port); |
| 474 | else |
| 475 | print_normal_symbol (sym, port); |
| 476 | } |
| 477 | |
| 478 | void |
| 479 | scm_print_symbol_name (const char *str, size_t len, SCM port) |
| 480 | { |
| 481 | SCM symbol = scm_from_utf8_symboln (str, len); |
| 482 | print_symbol (symbol, port); |
| 483 | } |
| 484 | |
| 485 | /* Print generally. Handles both write and display according to PSTATE. |
| 486 | */ |
| 487 | SCM_GPROC(s_write, "write", 1, 1, 0, scm_write, g_write); |
| 488 | SCM_GPROC(s_display, "display", 1, 1, 0, scm_display, g_display); |
| 489 | |
| 490 | static void iprin1 (SCM exp, SCM port, scm_print_state *pstate); |
| 491 | |
| 492 | |
| 493 | /* Print a character as an octal or hex escape. */ |
| 494 | #define PRINT_CHAR_ESCAPE(i, port) \ |
| 495 | do \ |
| 496 | { \ |
| 497 | if (!SCM_R6RS_ESCAPES_P) \ |
| 498 | scm_intprint (i, 8, port); \ |
| 499 | else \ |
| 500 | { \ |
| 501 | scm_puts_unlocked ("x", port); \ |
| 502 | scm_intprint (i, 16, port); \ |
| 503 | } \ |
| 504 | } \ |
| 505 | while (0) |
| 506 | |
| 507 | |
| 508 | void |
| 509 | scm_iprin1 (SCM exp, SCM port, scm_print_state *pstate) |
| 510 | { |
| 511 | if (pstate->fancyp |
| 512 | && scm_is_true (scm_memq (exp, pstate->highlight_objects))) |
| 513 | { |
| 514 | scm_display (SCM_PRINT_HIGHLIGHT_PREFIX, port); |
| 515 | iprin1 (exp, port, pstate); |
| 516 | scm_display (SCM_PRINT_HIGHLIGHT_SUFFIX, port); |
| 517 | } |
| 518 | else |
| 519 | iprin1 (exp, port, pstate); |
| 520 | } |
| 521 | |
| 522 | static void |
| 523 | iprin1 (SCM exp, SCM port, scm_print_state *pstate) |
| 524 | { |
| 525 | switch (SCM_ITAG3 (exp)) |
| 526 | { |
| 527 | case scm_tc3_tc7_1: |
| 528 | case scm_tc3_tc7_2: |
| 529 | /* These tc3 tags should never occur in an immediate value. They are |
| 530 | * only used in cell types of non-immediates, i. e. the value returned |
| 531 | * by SCM_CELL_TYPE (exp) can use these tags. |
| 532 | */ |
| 533 | scm_ipruk ("immediate", exp, port); |
| 534 | break; |
| 535 | case scm_tc3_int_1: |
| 536 | case scm_tc3_int_2: |
| 537 | scm_intprint (SCM_I_INUM (exp), 10, port); |
| 538 | break; |
| 539 | case scm_tc3_imm24: |
| 540 | if (SCM_CHARP (exp)) |
| 541 | { |
| 542 | if (SCM_WRITINGP (pstate)) |
| 543 | write_character (SCM_CHAR (exp), port, 0); |
| 544 | else |
| 545 | { |
| 546 | if (!display_character (SCM_CHAR (exp), port, |
| 547 | PORT_CONVERSION_HANDLER (port))) |
| 548 | scm_encoding_error (__func__, errno, |
| 549 | "cannot convert to output locale", |
| 550 | port, exp); |
| 551 | } |
| 552 | } |
| 553 | else if (SCM_IFLAGP (exp) |
| 554 | && ((size_t) SCM_IFLAGNUM (exp) < (sizeof iflagnames / sizeof (char *)))) |
| 555 | { |
| 556 | scm_puts_unlocked (iflagnames [SCM_IFLAGNUM (exp)], port); |
| 557 | } |
| 558 | else |
| 559 | { |
| 560 | /* unknown immediate value */ |
| 561 | scm_ipruk ("immediate", exp, port); |
| 562 | } |
| 563 | break; |
| 564 | case scm_tc3_cons: |
| 565 | switch (SCM_TYP7 (exp)) |
| 566 | { |
| 567 | case scm_tcs_struct: |
| 568 | { |
| 569 | ENTER_NESTED_DATA (pstate, exp, circref); |
| 570 | if (SCM_OBJ_CLASS_FLAGS (exp) & SCM_CLASSF_GOOPS) |
| 571 | { |
| 572 | SCM pwps, print = pstate->writingp ? g_write : g_display; |
| 573 | if (SCM_UNPACK (print) == 0) |
| 574 | goto print_struct; |
| 575 | pwps = scm_i_port_with_print_state (port, pstate->handle); |
| 576 | pstate->revealed = 1; |
| 577 | scm_call_2 (print, exp, pwps); |
| 578 | } |
| 579 | else |
| 580 | { |
| 581 | print_struct: |
| 582 | scm_print_struct (exp, port, pstate); |
| 583 | } |
| 584 | EXIT_NESTED_DATA (pstate); |
| 585 | } |
| 586 | break; |
| 587 | case scm_tcs_cons_imcar: |
| 588 | case scm_tcs_cons_nimcar: |
| 589 | ENTER_NESTED_DATA (pstate, exp, circref); |
| 590 | scm_iprlist ("(", exp, ')', port, pstate); |
| 591 | EXIT_NESTED_DATA (pstate); |
| 592 | break; |
| 593 | circref: |
| 594 | print_circref (port, pstate, exp); |
| 595 | break; |
| 596 | case scm_tc7_number: |
| 597 | switch SCM_TYP16 (exp) { |
| 598 | case scm_tc16_big: |
| 599 | scm_bigprint (exp, port, pstate); |
| 600 | break; |
| 601 | case scm_tc16_real: |
| 602 | scm_print_real (exp, port, pstate); |
| 603 | break; |
| 604 | case scm_tc16_complex: |
| 605 | scm_print_complex (exp, port, pstate); |
| 606 | break; |
| 607 | case scm_tc16_fraction: |
| 608 | scm_i_print_fraction (exp, port, pstate); |
| 609 | break; |
| 610 | } |
| 611 | break; |
| 612 | case scm_tc7_stringbuf: |
| 613 | scm_i_print_stringbuf (exp, port, pstate); |
| 614 | break; |
| 615 | case scm_tc7_string: |
| 616 | if (SCM_WRITINGP (pstate)) |
| 617 | { |
| 618 | size_t len, i; |
| 619 | |
| 620 | display_character ('"', port, iconveh_question_mark); |
| 621 | len = scm_i_string_length (exp); |
| 622 | for (i = 0; i < len; ++i) |
| 623 | write_character (scm_i_string_ref (exp, i), port, 1); |
| 624 | |
| 625 | display_character ('"', port, iconveh_question_mark); |
| 626 | scm_remember_upto_here_1 (exp); |
| 627 | } |
| 628 | else |
| 629 | { |
| 630 | size_t len, printed; |
| 631 | |
| 632 | len = scm_i_string_length (exp); |
| 633 | printed = display_string (scm_i_string_data (exp), |
| 634 | scm_i_is_narrow_string (exp), |
| 635 | len, port, |
| 636 | PORT_CONVERSION_HANDLER (port)); |
| 637 | if (SCM_UNLIKELY (printed < len)) |
| 638 | scm_encoding_error (__func__, errno, |
| 639 | "cannot convert to output locale", |
| 640 | port, scm_c_string_ref (exp, printed)); |
| 641 | } |
| 642 | |
| 643 | scm_remember_upto_here_1 (exp); |
| 644 | break; |
| 645 | case scm_tc7_symbol: |
| 646 | if (scm_i_symbol_is_interned (exp)) |
| 647 | { |
| 648 | print_symbol (exp, port); |
| 649 | scm_remember_upto_here_1 (exp); |
| 650 | } |
| 651 | else |
| 652 | { |
| 653 | scm_puts_unlocked ("#<uninterned-symbol ", port); |
| 654 | print_symbol (exp, port); |
| 655 | scm_putc_unlocked (' ', port); |
| 656 | scm_uintprint (SCM_UNPACK (exp), 16, port); |
| 657 | scm_putc_unlocked ('>', port); |
| 658 | } |
| 659 | break; |
| 660 | case scm_tc7_variable: |
| 661 | scm_i_variable_print (exp, port, pstate); |
| 662 | break; |
| 663 | case scm_tc7_rtl_program: |
| 664 | scm_i_program_print (exp, port, pstate); |
| 665 | break; |
| 666 | case scm_tc7_pointer: |
| 667 | scm_i_pointer_print (exp, port, pstate); |
| 668 | break; |
| 669 | case scm_tc7_hashtable: |
| 670 | scm_i_hashtable_print (exp, port, pstate); |
| 671 | break; |
| 672 | case scm_tc7_weak_set: |
| 673 | scm_i_weak_set_print (exp, port, pstate); |
| 674 | break; |
| 675 | case scm_tc7_weak_table: |
| 676 | scm_i_weak_table_print (exp, port, pstate); |
| 677 | break; |
| 678 | case scm_tc7_fluid: |
| 679 | scm_i_fluid_print (exp, port, pstate); |
| 680 | break; |
| 681 | case scm_tc7_dynamic_state: |
| 682 | scm_i_dynamic_state_print (exp, port, pstate); |
| 683 | break; |
| 684 | case scm_tc7_frame: |
| 685 | scm_i_frame_print (exp, port, pstate); |
| 686 | break; |
| 687 | case scm_tc7_vm: |
| 688 | scm_i_vm_print (exp, port, pstate); |
| 689 | break; |
| 690 | case scm_tc7_vm_cont: |
| 691 | scm_i_vm_cont_print (exp, port, pstate); |
| 692 | break; |
| 693 | case scm_tc7_array: |
| 694 | ENTER_NESTED_DATA (pstate, exp, circref); |
| 695 | scm_i_print_array (exp, port, pstate); |
| 696 | EXIT_NESTED_DATA (pstate); |
| 697 | break; |
| 698 | case scm_tc7_bytevector: |
| 699 | scm_i_print_bytevector (exp, port, pstate); |
| 700 | break; |
| 701 | case scm_tc7_bitvector: |
| 702 | scm_i_print_bitvector (exp, port, pstate); |
| 703 | break; |
| 704 | case scm_tc7_wvect: |
| 705 | ENTER_NESTED_DATA (pstate, exp, circref); |
| 706 | scm_puts_unlocked ("#w(", port); |
| 707 | goto common_vector_printer; |
| 708 | case scm_tc7_vector: |
| 709 | ENTER_NESTED_DATA (pstate, exp, circref); |
| 710 | scm_puts_unlocked ("#(", port); |
| 711 | common_vector_printer: |
| 712 | { |
| 713 | register long i; |
| 714 | long last = SCM_SIMPLE_VECTOR_LENGTH (exp) - 1; |
| 715 | int cutp = 0; |
| 716 | if (pstate->fancyp |
| 717 | && SCM_SIMPLE_VECTOR_LENGTH (exp) > pstate->length) |
| 718 | { |
| 719 | last = pstate->length - 1; |
| 720 | cutp = 1; |
| 721 | } |
| 722 | for (i = 0; i < last; ++i) |
| 723 | { |
| 724 | scm_iprin1 (scm_c_vector_ref (exp, i), port, pstate); |
| 725 | scm_putc_unlocked (' ', port); |
| 726 | } |
| 727 | if (i == last) |
| 728 | { |
| 729 | /* CHECK_INTS; */ |
| 730 | scm_iprin1 (scm_c_vector_ref (exp, i), port, pstate); |
| 731 | } |
| 732 | if (cutp) |
| 733 | scm_puts_unlocked (" ...", port); |
| 734 | scm_putc_unlocked (')', port); |
| 735 | } |
| 736 | EXIT_NESTED_DATA (pstate); |
| 737 | break; |
| 738 | case scm_tc7_port: |
| 739 | { |
| 740 | scm_t_ptob_descriptor *ptob = SCM_PORT_DESCRIPTOR (exp); |
| 741 | if (ptob->print && ptob->print (exp, port, pstate)) |
| 742 | break; |
| 743 | goto punk; |
| 744 | } |
| 745 | case scm_tc7_smob: |
| 746 | ENTER_NESTED_DATA (pstate, exp, circref); |
| 747 | SCM_SMOB_DESCRIPTOR (exp).print (exp, port, pstate); |
| 748 | EXIT_NESTED_DATA (pstate); |
| 749 | break; |
| 750 | default: |
| 751 | /* case scm_tcs_closures: */ |
| 752 | punk: |
| 753 | scm_ipruk ("type", exp, port); |
| 754 | } |
| 755 | } |
| 756 | } |
| 757 | |
| 758 | /* Print states are necessary for circular reference safe printing. |
| 759 | * They are also expensive to allocate. Therefore print states are |
| 760 | * kept in a pool so that they can be reused. |
| 761 | */ |
| 762 | |
| 763 | /* The PORT argument can also be a print-state/port pair, which will |
| 764 | * then be used instead of allocating a new print state. This is |
| 765 | * useful for continuing a chain of print calls from Scheme. */ |
| 766 | |
| 767 | void |
| 768 | scm_prin1 (SCM exp, SCM port, int writingp) |
| 769 | { |
| 770 | SCM handle = SCM_BOOL_F; /* Will GC protect the handle whilst unlinked */ |
| 771 | SCM pstate_scm; |
| 772 | scm_print_state *pstate; |
| 773 | int old_writingp; |
| 774 | |
| 775 | /* If PORT is a print-state/port pair, use that. Else create a new |
| 776 | print-state. */ |
| 777 | |
| 778 | if (SCM_PORT_WITH_PS_P (port)) |
| 779 | { |
| 780 | pstate_scm = SCM_PORT_WITH_PS_PS (port); |
| 781 | port = SCM_PORT_WITH_PS_PORT (port); |
| 782 | } |
| 783 | else |
| 784 | { |
| 785 | /* First try to allocate a print state from the pool */ |
| 786 | scm_i_pthread_mutex_lock (&print_state_mutex); |
| 787 | if (!scm_is_null (print_state_pool)) |
| 788 | { |
| 789 | handle = print_state_pool; |
| 790 | print_state_pool = SCM_CDR (print_state_pool); |
| 791 | } |
| 792 | scm_i_pthread_mutex_unlock (&print_state_mutex); |
| 793 | if (scm_is_false (handle)) |
| 794 | handle = scm_list_1 (make_print_state ()); |
| 795 | pstate_scm = SCM_CAR (handle); |
| 796 | } |
| 797 | |
| 798 | pstate = SCM_PRINT_STATE (pstate_scm); |
| 799 | old_writingp = pstate->writingp; |
| 800 | pstate->writingp = writingp; |
| 801 | scm_iprin1 (exp, port, pstate); |
| 802 | pstate->writingp = old_writingp; |
| 803 | |
| 804 | /* Return print state to pool if it has been created above and |
| 805 | hasn't escaped to Scheme. */ |
| 806 | |
| 807 | if (scm_is_true (handle) && !pstate->revealed) |
| 808 | { |
| 809 | scm_i_pthread_mutex_lock (&print_state_mutex); |
| 810 | SCM_SETCDR (handle, print_state_pool); |
| 811 | print_state_pool = handle; |
| 812 | scm_i_pthread_mutex_unlock (&print_state_mutex); |
| 813 | } |
| 814 | } |
| 815 | |
| 816 | /* Convert codepoint CH to UTF-8 and store the result in UTF8. Return |
| 817 | the number of bytes of the UTF-8-encoded string. */ |
| 818 | static size_t |
| 819 | codepoint_to_utf8 (scm_t_wchar ch, scm_t_uint8 utf8[4]) |
| 820 | { |
| 821 | size_t len; |
| 822 | scm_t_uint32 codepoint; |
| 823 | |
| 824 | codepoint = (scm_t_uint32) ch; |
| 825 | |
| 826 | if (codepoint <= 0x7f) |
| 827 | { |
| 828 | len = 1; |
| 829 | utf8[0] = (scm_t_uint8) codepoint; |
| 830 | } |
| 831 | else if (codepoint <= 0x7ffUL) |
| 832 | { |
| 833 | len = 2; |
| 834 | utf8[0] = 0xc0 | (codepoint >> 6); |
| 835 | utf8[1] = 0x80 | (codepoint & 0x3f); |
| 836 | } |
| 837 | else if (codepoint <= 0xffffUL) |
| 838 | { |
| 839 | len = 3; |
| 840 | utf8[0] = 0xe0 | (codepoint >> 12); |
| 841 | utf8[1] = 0x80 | ((codepoint >> 6) & 0x3f); |
| 842 | utf8[2] = 0x80 | (codepoint & 0x3f); |
| 843 | } |
| 844 | else |
| 845 | { |
| 846 | len = 4; |
| 847 | utf8[0] = 0xf0 | (codepoint >> 18); |
| 848 | utf8[1] = 0x80 | ((codepoint >> 12) & 0x3f); |
| 849 | utf8[2] = 0x80 | ((codepoint >> 6) & 0x3f); |
| 850 | utf8[3] = 0x80 | (codepoint & 0x3f); |
| 851 | } |
| 852 | |
| 853 | return len; |
| 854 | } |
| 855 | |
| 856 | #define STR_REF(s, x) \ |
| 857 | (narrow_p \ |
| 858 | ? (scm_t_wchar) ((unsigned char *) (s))[x] \ |
| 859 | : ((scm_t_wchar *) (s))[x]) |
| 860 | |
| 861 | /* Write STR to PORT as UTF-8. STR is a LEN-codepoint string; it is |
| 862 | narrow if NARROW_P is true, wide otherwise. Return LEN. */ |
| 863 | static size_t |
| 864 | display_string_as_utf8 (const void *str, int narrow_p, size_t len, |
| 865 | SCM port) |
| 866 | { |
| 867 | size_t printed = 0; |
| 868 | |
| 869 | while (len > printed) |
| 870 | { |
| 871 | size_t utf8_len, i; |
| 872 | char *input, utf8_buf[256]; |
| 873 | |
| 874 | /* Convert STR to UTF-8. */ |
| 875 | for (i = printed, utf8_len = 0, input = utf8_buf; |
| 876 | i < len && utf8_len + 4 < sizeof (utf8_buf); |
| 877 | i++) |
| 878 | { |
| 879 | utf8_len += codepoint_to_utf8 (STR_REF (str, i), |
| 880 | (scm_t_uint8 *) input); |
| 881 | input = utf8_buf + utf8_len; |
| 882 | } |
| 883 | |
| 884 | /* INPUT was successfully converted, entirely; print the |
| 885 | result. */ |
| 886 | scm_lfwrite_unlocked (utf8_buf, utf8_len, port); |
| 887 | printed += i - printed; |
| 888 | } |
| 889 | |
| 890 | assert (printed == len); |
| 891 | |
| 892 | return len; |
| 893 | } |
| 894 | |
| 895 | /* Write STR to PORT as ISO-8859-1. STR is a LEN-codepoint string; it |
| 896 | is narrow if NARROW_P is true, wide otherwise. Return LEN. */ |
| 897 | static size_t |
| 898 | display_string_as_latin1 (const void *str, int narrow_p, size_t len, |
| 899 | SCM port, |
| 900 | scm_t_string_failed_conversion_handler strategy) |
| 901 | { |
| 902 | size_t printed = 0; |
| 903 | |
| 904 | if (narrow_p) |
| 905 | { |
| 906 | scm_lfwrite_unlocked (str, len, port); |
| 907 | return len; |
| 908 | } |
| 909 | |
| 910 | while (printed < len) |
| 911 | { |
| 912 | char buf[256]; |
| 913 | size_t i; |
| 914 | |
| 915 | for (i = 0; i < sizeof(buf) && printed < len; i++, printed++) |
| 916 | { |
| 917 | scm_t_wchar c = STR_REF (str, printed); |
| 918 | |
| 919 | if (c < 256) |
| 920 | buf[i] = c; |
| 921 | else |
| 922 | break; |
| 923 | } |
| 924 | |
| 925 | scm_lfwrite_unlocked (buf, i, port); |
| 926 | |
| 927 | if (i < sizeof(buf) && printed < len) |
| 928 | { |
| 929 | if (strategy == SCM_FAILED_CONVERSION_ERROR) |
| 930 | break; |
| 931 | else if (strategy == SCM_FAILED_CONVERSION_ESCAPE_SEQUENCE) |
| 932 | write_character_escaped (STR_REF (str, printed), 1, port); |
| 933 | else |
| 934 | /* STRATEGY is `SCM_FAILED_CONVERSION_QUESTION_MARK'. */ |
| 935 | display_string ("?", 1, 1, port, strategy); |
| 936 | printed++; |
| 937 | } |
| 938 | } |
| 939 | |
| 940 | return printed; |
| 941 | } |
| 942 | |
| 943 | /* Convert STR through PORT's output conversion descriptor and write the |
| 944 | output to PORT. Return the number of codepoints written. */ |
| 945 | static size_t |
| 946 | display_string_using_iconv (const void *str, int narrow_p, size_t len, |
| 947 | SCM port, |
| 948 | scm_t_string_failed_conversion_handler strategy) |
| 949 | { |
| 950 | size_t printed; |
| 951 | scm_t_iconv_descriptors *id; |
| 952 | scm_t_port_internal *pti = SCM_PORT_GET_INTERNAL (port); |
| 953 | |
| 954 | id = scm_i_port_iconv_descriptors (port, SCM_PORT_WRITE); |
| 955 | |
| 956 | if (SCM_UNLIKELY (pti->at_stream_start_for_bom_write && len > 0)) |
| 957 | { |
| 958 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
| 959 | |
| 960 | /* Record that we're no longer at stream start. */ |
| 961 | pti->at_stream_start_for_bom_write = 0; |
| 962 | if (pt->rw_random) |
| 963 | pti->at_stream_start_for_bom_read = 0; |
| 964 | |
| 965 | /* Write a BOM if appropriate. */ |
| 966 | if (SCM_UNLIKELY (strcmp(pt->encoding, "UTF-16") == 0 |
| 967 | || strcmp(pt->encoding, "UTF-32") == 0)) |
| 968 | display_character (SCM_UNICODE_BOM, port, iconveh_error); |
| 969 | } |
| 970 | |
| 971 | printed = 0; |
| 972 | |
| 973 | while (len > printed) |
| 974 | { |
| 975 | size_t done, utf8_len, input_left, output_left, i; |
| 976 | size_t codepoints_read, output_len; |
| 977 | char *input, *output; |
| 978 | char utf8_buf[256], encoded_output[256]; |
| 979 | size_t offsets[256]; |
| 980 | |
| 981 | /* Convert STR to UTF-8. */ |
| 982 | for (i = printed, utf8_len = 0, input = utf8_buf; |
| 983 | i < len && utf8_len + 4 < sizeof (utf8_buf); |
| 984 | i++) |
| 985 | { |
| 986 | offsets[utf8_len] = i; |
| 987 | utf8_len += codepoint_to_utf8 (STR_REF (str, i), |
| 988 | (scm_t_uint8 *) input); |
| 989 | input = utf8_buf + utf8_len; |
| 990 | } |
| 991 | |
| 992 | input = utf8_buf; |
| 993 | input_left = utf8_len; |
| 994 | |
| 995 | output = encoded_output; |
| 996 | output_left = sizeof (encoded_output); |
| 997 | |
| 998 | done = iconv (id->output_cd, &input, &input_left, |
| 999 | &output, &output_left); |
| 1000 | |
| 1001 | output_len = sizeof (encoded_output) - output_left; |
| 1002 | |
| 1003 | if (SCM_UNLIKELY (done == (size_t) -1)) |
| 1004 | { |
| 1005 | int errno_save = errno; |
| 1006 | |
| 1007 | /* Reset the `iconv' state. */ |
| 1008 | iconv (id->output_cd, NULL, NULL, NULL, NULL); |
| 1009 | |
| 1010 | /* Print the OUTPUT_LEN bytes successfully converted. */ |
| 1011 | scm_lfwrite_unlocked (encoded_output, output_len, port); |
| 1012 | |
| 1013 | /* See how many input codepoints these OUTPUT_LEN bytes |
| 1014 | corresponds to. */ |
| 1015 | codepoints_read = offsets[input - utf8_buf] - printed; |
| 1016 | printed += codepoints_read; |
| 1017 | |
| 1018 | if (errno_save == EILSEQ && |
| 1019 | strategy != SCM_FAILED_CONVERSION_ERROR) |
| 1020 | { |
| 1021 | /* Conversion failed somewhere in INPUT and we want to |
| 1022 | escape or substitute the offending input character. */ |
| 1023 | |
| 1024 | if (strategy == SCM_FAILED_CONVERSION_ESCAPE_SEQUENCE) |
| 1025 | { |
| 1026 | scm_t_wchar ch; |
| 1027 | |
| 1028 | /* Find CH, the offending codepoint, and escape it. */ |
| 1029 | ch = STR_REF (str, offsets[input - utf8_buf]); |
| 1030 | write_character_escaped (ch, 1, port); |
| 1031 | } |
| 1032 | else |
| 1033 | /* STRATEGY is `SCM_FAILED_CONVERSION_QUESTION_MARK'. */ |
| 1034 | display_string ("?", 1, 1, port, strategy); |
| 1035 | |
| 1036 | printed++; |
| 1037 | } |
| 1038 | else |
| 1039 | /* Something bad happened that we can't handle: bail out. */ |
| 1040 | break; |
| 1041 | } |
| 1042 | else |
| 1043 | { |
| 1044 | /* INPUT was successfully converted, entirely; print the |
| 1045 | result. */ |
| 1046 | scm_lfwrite_unlocked (encoded_output, output_len, port); |
| 1047 | codepoints_read = i - printed; |
| 1048 | printed += codepoints_read; |
| 1049 | } |
| 1050 | } |
| 1051 | |
| 1052 | return printed; |
| 1053 | } |
| 1054 | |
| 1055 | #undef STR_REF |
| 1056 | |
| 1057 | /* Display the LEN codepoints in STR to PORT according to STRATEGY; |
| 1058 | return the number of codepoints successfully displayed. If NARROW_P, |
| 1059 | then STR is interpreted as a sequence of `char', denoting a Latin-1 |
| 1060 | string; otherwise it's interpreted as a sequence of |
| 1061 | `scm_t_wchar'. */ |
| 1062 | static size_t |
| 1063 | display_string (const void *str, int narrow_p, |
| 1064 | size_t len, SCM port, |
| 1065 | scm_t_string_failed_conversion_handler strategy) |
| 1066 | { |
| 1067 | scm_t_port_internal *pti; |
| 1068 | |
| 1069 | pti = SCM_PORT_GET_INTERNAL (port); |
| 1070 | |
| 1071 | if (pti->encoding_mode == SCM_PORT_ENCODING_MODE_UTF8) |
| 1072 | return display_string_as_utf8 (str, narrow_p, len, port); |
| 1073 | else if (pti->encoding_mode == SCM_PORT_ENCODING_MODE_LATIN1) |
| 1074 | return display_string_as_latin1 (str, narrow_p, len, port, strategy); |
| 1075 | else |
| 1076 | return display_string_using_iconv (str, narrow_p, len, port, strategy); |
| 1077 | } |
| 1078 | |
| 1079 | /* Attempt to display CH to PORT according to STRATEGY. Return non-zero |
| 1080 | if CH was successfully displayed, zero otherwise (e.g., if it was not |
| 1081 | representable in PORT's encoding.) */ |
| 1082 | static int |
| 1083 | display_character (scm_t_wchar ch, SCM port, |
| 1084 | scm_t_string_failed_conversion_handler strategy) |
| 1085 | { |
| 1086 | return display_string (&ch, 0, 1, port, strategy) == 1; |
| 1087 | } |
| 1088 | |
| 1089 | /* Attempt to pretty-print CH, a combining character, to PORT. Return |
| 1090 | zero upon failure, non-zero otherwise. The idea is to print CH above |
| 1091 | a dotted circle to make it more visible. */ |
| 1092 | static int |
| 1093 | write_combining_character (scm_t_wchar ch, SCM port) |
| 1094 | { |
| 1095 | scm_t_wchar str[2]; |
| 1096 | |
| 1097 | str[0] = SCM_CODEPOINT_DOTTED_CIRCLE; |
| 1098 | str[1] = ch; |
| 1099 | |
| 1100 | return display_string (str, 0, 2, port, iconveh_error) == 2; |
| 1101 | } |
| 1102 | |
| 1103 | /* Write CH to PORT in its escaped form, using the string escape syntax |
| 1104 | if STRING_ESCAPES_P is non-zero. */ |
| 1105 | static void |
| 1106 | write_character_escaped (scm_t_wchar ch, int string_escapes_p, SCM port) |
| 1107 | { |
| 1108 | if (string_escapes_p) |
| 1109 | { |
| 1110 | /* Represent CH using the in-string escape syntax. */ |
| 1111 | |
| 1112 | static const char hex[] = "0123456789abcdef"; |
| 1113 | static const char escapes[7] = "abtnvfr"; |
| 1114 | char buf[9]; |
| 1115 | |
| 1116 | if (ch >= 0x07 && ch <= 0x0D && ch != 0x0A) |
| 1117 | { |
| 1118 | /* Use special escapes for some C0 controls. */ |
| 1119 | buf[0] = '\\'; |
| 1120 | buf[1] = escapes[ch - 0x07]; |
| 1121 | scm_lfwrite_unlocked (buf, 2, port); |
| 1122 | } |
| 1123 | else if (!SCM_R6RS_ESCAPES_P) |
| 1124 | { |
| 1125 | if (ch <= 0xFF) |
| 1126 | { |
| 1127 | buf[0] = '\\'; |
| 1128 | buf[1] = 'x'; |
| 1129 | buf[2] = hex[ch / 16]; |
| 1130 | buf[3] = hex[ch % 16]; |
| 1131 | scm_lfwrite_unlocked (buf, 4, port); |
| 1132 | } |
| 1133 | else if (ch <= 0xFFFF) |
| 1134 | { |
| 1135 | buf[0] = '\\'; |
| 1136 | buf[1] = 'u'; |
| 1137 | buf[2] = hex[(ch & 0xF000) >> 12]; |
| 1138 | buf[3] = hex[(ch & 0xF00) >> 8]; |
| 1139 | buf[4] = hex[(ch & 0xF0) >> 4]; |
| 1140 | buf[5] = hex[(ch & 0xF)]; |
| 1141 | scm_lfwrite_unlocked (buf, 6, port); |
| 1142 | } |
| 1143 | else if (ch > 0xFFFF) |
| 1144 | { |
| 1145 | buf[0] = '\\'; |
| 1146 | buf[1] = 'U'; |
| 1147 | buf[2] = hex[(ch & 0xF00000) >> 20]; |
| 1148 | buf[3] = hex[(ch & 0xF0000) >> 16]; |
| 1149 | buf[4] = hex[(ch & 0xF000) >> 12]; |
| 1150 | buf[5] = hex[(ch & 0xF00) >> 8]; |
| 1151 | buf[6] = hex[(ch & 0xF0) >> 4]; |
| 1152 | buf[7] = hex[(ch & 0xF)]; |
| 1153 | scm_lfwrite_unlocked (buf, 8, port); |
| 1154 | } |
| 1155 | } |
| 1156 | else |
| 1157 | { |
| 1158 | /* Print an R6RS variable-length hex escape: "\xNNNN;". */ |
| 1159 | scm_t_wchar ch2 = ch; |
| 1160 | |
| 1161 | int i = 8; |
| 1162 | buf[i] = ';'; |
| 1163 | i --; |
| 1164 | if (ch == 0) |
| 1165 | buf[i--] = '0'; |
| 1166 | else |
| 1167 | while (ch2 > 0) |
| 1168 | { |
| 1169 | buf[i] = hex[ch2 & 0xF]; |
| 1170 | ch2 >>= 4; |
| 1171 | i --; |
| 1172 | } |
| 1173 | buf[i] = 'x'; |
| 1174 | i --; |
| 1175 | buf[i] = '\\'; |
| 1176 | scm_lfwrite_unlocked (buf + i, 9 - i, port); |
| 1177 | } |
| 1178 | } |
| 1179 | else |
| 1180 | { |
| 1181 | /* Represent CH using the character escape syntax. */ |
| 1182 | const char *name; |
| 1183 | |
| 1184 | name = scm_i_charname (SCM_MAKE_CHAR (ch)); |
| 1185 | if (name != NULL) |
| 1186 | scm_puts_unlocked (name, port); |
| 1187 | else |
| 1188 | PRINT_CHAR_ESCAPE (ch, port); |
| 1189 | } |
| 1190 | } |
| 1191 | |
| 1192 | /* Write CH to PORT, escaping it if it's non-graphic or not |
| 1193 | representable in PORT's encoding. If STRING_ESCAPES_P is true and CH |
| 1194 | needs to be escaped, it is escaped using the in-string escape syntax; |
| 1195 | otherwise the character escape syntax is used. */ |
| 1196 | static void |
| 1197 | write_character (scm_t_wchar ch, SCM port, int string_escapes_p) |
| 1198 | { |
| 1199 | int printed = 0; |
| 1200 | scm_t_string_failed_conversion_handler strategy; |
| 1201 | |
| 1202 | strategy = PORT_CONVERSION_HANDLER (port); |
| 1203 | |
| 1204 | if (string_escapes_p) |
| 1205 | { |
| 1206 | /* Check if CH deserves special treatment. */ |
| 1207 | if (ch == '"' || ch == '\\') |
| 1208 | { |
| 1209 | display_character ('\\', port, iconveh_question_mark); |
| 1210 | display_character (ch, port, strategy); |
| 1211 | printed = 1; |
| 1212 | } |
| 1213 | else if (ch == '\n' && SCM_PRINT_ESCAPE_NEWLINES_P) |
| 1214 | { |
| 1215 | display_character ('\\', port, iconveh_question_mark); |
| 1216 | display_character ('n', port, strategy); |
| 1217 | printed = 1; |
| 1218 | } |
| 1219 | else if (ch == ' ' || ch == '\n') |
| 1220 | { |
| 1221 | display_character (ch, port, strategy); |
| 1222 | printed = 1; |
| 1223 | } |
| 1224 | } |
| 1225 | else |
| 1226 | { |
| 1227 | display_string ("#\\", 1, 2, port, iconveh_question_mark); |
| 1228 | |
| 1229 | if (uc_combining_class (ch) != UC_CCC_NR) |
| 1230 | /* Character is a combining character, so attempt to |
| 1231 | pretty-print it. */ |
| 1232 | printed = write_combining_character (ch, port); |
| 1233 | } |
| 1234 | |
| 1235 | if (!printed |
| 1236 | && uc_is_general_category_withtable (ch, |
| 1237 | UC_CATEGORY_MASK_L | |
| 1238 | UC_CATEGORY_MASK_M | |
| 1239 | UC_CATEGORY_MASK_N | |
| 1240 | UC_CATEGORY_MASK_P | |
| 1241 | UC_CATEGORY_MASK_S)) |
| 1242 | /* CH is graphic; attempt to display it. */ |
| 1243 | printed = display_character (ch, port, iconveh_error); |
| 1244 | |
| 1245 | if (!printed) |
| 1246 | /* CH isn't graphic or cannot be represented in PORT's encoding. */ |
| 1247 | write_character_escaped (ch, string_escapes_p, port); |
| 1248 | } |
| 1249 | |
| 1250 | /* Display STR to PORT from START inclusive to END exclusive. */ |
| 1251 | void |
| 1252 | scm_i_display_substring (SCM str, size_t start, size_t end, SCM port) |
| 1253 | { |
| 1254 | int narrow_p; |
| 1255 | const char *buf; |
| 1256 | size_t len, printed; |
| 1257 | |
| 1258 | buf = scm_i_string_data (str); |
| 1259 | len = end - start; |
| 1260 | narrow_p = scm_i_is_narrow_string (str); |
| 1261 | buf += start * (narrow_p ? sizeof (char) : sizeof (scm_t_wchar)); |
| 1262 | |
| 1263 | printed = display_string (buf, narrow_p, end - start, port, |
| 1264 | PORT_CONVERSION_HANDLER (port)); |
| 1265 | |
| 1266 | if (SCM_UNLIKELY (printed < len)) |
| 1267 | scm_encoding_error (__func__, errno, |
| 1268 | "cannot convert to output locale", |
| 1269 | port, scm_c_string_ref (str, printed + start)); |
| 1270 | } |
| 1271 | |
| 1272 | \f |
| 1273 | /* Print an integer. |
| 1274 | */ |
| 1275 | |
| 1276 | void |
| 1277 | scm_intprint (scm_t_intmax n, int radix, SCM port) |
| 1278 | { |
| 1279 | char num_buf[SCM_INTBUFLEN]; |
| 1280 | scm_lfwrite_unlocked (num_buf, scm_iint2str (n, radix, num_buf), port); |
| 1281 | } |
| 1282 | |
| 1283 | void |
| 1284 | scm_uintprint (scm_t_uintmax n, int radix, SCM port) |
| 1285 | { |
| 1286 | char num_buf[SCM_INTBUFLEN]; |
| 1287 | scm_lfwrite_unlocked (num_buf, scm_iuint2str (n, radix, num_buf), port); |
| 1288 | } |
| 1289 | |
| 1290 | /* Print an object of unrecognized type. |
| 1291 | */ |
| 1292 | |
| 1293 | void |
| 1294 | scm_ipruk (char *hdr, SCM ptr, SCM port) |
| 1295 | { |
| 1296 | scm_puts_unlocked ("#<unknown-", port); |
| 1297 | scm_puts_unlocked (hdr, port); |
| 1298 | if (1) /* (scm_in_heap_p (ptr)) */ /* FIXME */ |
| 1299 | { |
| 1300 | scm_puts_unlocked (" (0x", port); |
| 1301 | scm_uintprint (SCM_CELL_WORD_0 (ptr), 16, port); |
| 1302 | scm_puts_unlocked (" . 0x", port); |
| 1303 | scm_uintprint (SCM_CELL_WORD_1 (ptr), 16, port); |
| 1304 | scm_puts_unlocked (") @", port); |
| 1305 | } |
| 1306 | scm_puts_unlocked (" 0x", port); |
| 1307 | scm_uintprint (SCM_UNPACK (ptr), 16, port); |
| 1308 | scm_putc_unlocked ('>', port); |
| 1309 | } |
| 1310 | |
| 1311 | |
| 1312 | /* Print a list. |
| 1313 | */ |
| 1314 | void |
| 1315 | scm_iprlist (char *hdr, SCM exp, int tlr, SCM port, scm_print_state *pstate) |
| 1316 | { |
| 1317 | register SCM hare, tortoise; |
| 1318 | long floor = pstate->top - 2; |
| 1319 | scm_puts_unlocked (hdr, port); |
| 1320 | /* CHECK_INTS; */ |
| 1321 | if (pstate->fancyp) |
| 1322 | goto fancy_printing; |
| 1323 | |
| 1324 | /* Run a hare and tortoise so that total time complexity will be |
| 1325 | O(depth * N) instead of O(N^2). */ |
| 1326 | hare = SCM_CDR (exp); |
| 1327 | tortoise = exp; |
| 1328 | while (scm_is_pair (hare)) |
| 1329 | { |
| 1330 | if (scm_is_eq (hare, tortoise)) |
| 1331 | goto fancy_printing; |
| 1332 | hare = SCM_CDR (hare); |
| 1333 | if (!scm_is_pair (hare)) |
| 1334 | break; |
| 1335 | hare = SCM_CDR (hare); |
| 1336 | tortoise = SCM_CDR (tortoise); |
| 1337 | } |
| 1338 | |
| 1339 | /* No cdr cycles intrinsic to this list */ |
| 1340 | scm_iprin1 (SCM_CAR (exp), port, pstate); |
| 1341 | for (exp = SCM_CDR (exp); scm_is_pair (exp); exp = SCM_CDR (exp)) |
| 1342 | { |
| 1343 | register long i; |
| 1344 | |
| 1345 | for (i = floor; i >= 0; --i) |
| 1346 | if (scm_is_eq (PSTATE_STACK_REF(pstate, i), exp)) |
| 1347 | goto circref; |
| 1348 | PUSH_REF (pstate, exp); |
| 1349 | scm_putc_unlocked (' ', port); |
| 1350 | /* CHECK_INTS; */ |
| 1351 | scm_iprin1 (SCM_CAR (exp), port, pstate); |
| 1352 | } |
| 1353 | if (!SCM_NULL_OR_NIL_P (exp)) |
| 1354 | { |
| 1355 | scm_puts_unlocked (" . ", port); |
| 1356 | scm_iprin1 (exp, port, pstate); |
| 1357 | } |
| 1358 | |
| 1359 | end: |
| 1360 | scm_putc_unlocked (tlr, port); |
| 1361 | pstate->top = floor + 2; |
| 1362 | return; |
| 1363 | |
| 1364 | fancy_printing: |
| 1365 | { |
| 1366 | long n = pstate->length; |
| 1367 | |
| 1368 | scm_iprin1 (SCM_CAR (exp), port, pstate); |
| 1369 | exp = SCM_CDR (exp); --n; |
| 1370 | for (; scm_is_pair (exp); exp = SCM_CDR (exp)) |
| 1371 | { |
| 1372 | register unsigned long i; |
| 1373 | |
| 1374 | for (i = 0; i < pstate->top; ++i) |
| 1375 | if (scm_is_eq (PSTATE_STACK_REF(pstate, i), exp)) |
| 1376 | goto fancy_circref; |
| 1377 | if (pstate->fancyp) |
| 1378 | { |
| 1379 | if (n == 0) |
| 1380 | { |
| 1381 | scm_puts_unlocked (" ...", port); |
| 1382 | goto skip_tail; |
| 1383 | } |
| 1384 | else |
| 1385 | --n; |
| 1386 | } |
| 1387 | PUSH_REF(pstate, exp); |
| 1388 | ++pstate->list_offset; |
| 1389 | scm_putc_unlocked (' ', port); |
| 1390 | /* CHECK_INTS; */ |
| 1391 | scm_iprin1 (SCM_CAR (exp), port, pstate); |
| 1392 | } |
| 1393 | } |
| 1394 | if (!SCM_NULL_OR_NIL_P (exp)) |
| 1395 | { |
| 1396 | scm_puts_unlocked (" . ", port); |
| 1397 | scm_iprin1 (exp, port, pstate); |
| 1398 | } |
| 1399 | skip_tail: |
| 1400 | pstate->list_offset -= pstate->top - floor - 2; |
| 1401 | goto end; |
| 1402 | |
| 1403 | fancy_circref: |
| 1404 | pstate->list_offset -= pstate->top - floor - 2; |
| 1405 | |
| 1406 | circref: |
| 1407 | scm_puts_unlocked (" . ", port); |
| 1408 | print_circref (port, pstate, exp); |
| 1409 | goto end; |
| 1410 | } |
| 1411 | |
| 1412 | \f |
| 1413 | |
| 1414 | int |
| 1415 | scm_valid_oport_value_p (SCM val) |
| 1416 | { |
| 1417 | return (SCM_OPOUTPORTP (val) |
| 1418 | || (SCM_PORT_WITH_PS_P (val) |
| 1419 | && SCM_OPOUTPORTP (SCM_PORT_WITH_PS_PORT (val)))); |
| 1420 | } |
| 1421 | |
| 1422 | /* SCM_GPROC(s_write, "write", 1, 1, 0, scm_write, g_write); */ |
| 1423 | |
| 1424 | SCM |
| 1425 | scm_write (SCM obj, SCM port) |
| 1426 | { |
| 1427 | if (SCM_UNBNDP (port)) |
| 1428 | port = scm_current_output_port (); |
| 1429 | |
| 1430 | SCM_ASSERT (scm_valid_oport_value_p (port), port, SCM_ARG2, s_write); |
| 1431 | |
| 1432 | scm_dynwind_begin (0); |
| 1433 | scm_dynwind_lock_port (SCM_COERCE_OUTPORT (port)); |
| 1434 | scm_prin1 (obj, port, 1); |
| 1435 | scm_dynwind_end (); |
| 1436 | |
| 1437 | return SCM_UNSPECIFIED; |
| 1438 | } |
| 1439 | |
| 1440 | |
| 1441 | /* SCM_GPROC(s_display, "display", 1, 1, 0, scm_display, g_display); */ |
| 1442 | |
| 1443 | SCM |
| 1444 | scm_display (SCM obj, SCM port) |
| 1445 | { |
| 1446 | if (SCM_UNBNDP (port)) |
| 1447 | port = scm_current_output_port (); |
| 1448 | |
| 1449 | SCM_ASSERT (scm_valid_oport_value_p (port), port, SCM_ARG2, s_display); |
| 1450 | |
| 1451 | scm_dynwind_begin (0); |
| 1452 | scm_dynwind_lock_port (SCM_COERCE_OUTPORT (port)); |
| 1453 | scm_prin1 (obj, port, 0); |
| 1454 | scm_dynwind_end (); |
| 1455 | |
| 1456 | return SCM_UNSPECIFIED; |
| 1457 | } |
| 1458 | |
| 1459 | |
| 1460 | SCM_DEFINE (scm_simple_format, "simple-format", 2, 0, 1, |
| 1461 | (SCM destination, SCM message, SCM args), |
| 1462 | "Write @var{message} to @var{destination}, defaulting to\n" |
| 1463 | "the current output port.\n" |
| 1464 | "@var{message} can contain @code{~A} (was @code{%s}) and\n" |
| 1465 | "@code{~S} (was @code{%S}) escapes. When printed,\n" |
| 1466 | "the escapes are replaced with corresponding members of\n" |
| 1467 | "@var{args}:\n" |
| 1468 | "@code{~A} formats using @code{display} and @code{~S} formats\n" |
| 1469 | "using @code{write}.\n" |
| 1470 | "If @var{destination} is @code{#t}, then use the current output\n" |
| 1471 | "port, if @var{destination} is @code{#f}, then return a string\n" |
| 1472 | "containing the formatted text. Does not add a trailing newline.") |
| 1473 | #define FUNC_NAME s_scm_simple_format |
| 1474 | { |
| 1475 | SCM port, answer = SCM_UNSPECIFIED; |
| 1476 | int fReturnString = 0; |
| 1477 | int writingp; |
| 1478 | size_t start, p, end; |
| 1479 | |
| 1480 | if (scm_is_eq (destination, SCM_BOOL_T)) |
| 1481 | { |
| 1482 | destination = port = scm_current_output_port (); |
| 1483 | } |
| 1484 | else if (scm_is_false (destination)) |
| 1485 | { |
| 1486 | fReturnString = 1; |
| 1487 | port = scm_mkstrport (SCM_INUM0, SCM_BOOL_F, |
| 1488 | SCM_OPN | SCM_WRTNG, |
| 1489 | FUNC_NAME); |
| 1490 | destination = port; |
| 1491 | } |
| 1492 | else |
| 1493 | { |
| 1494 | SCM_VALIDATE_OPORT_VALUE (1, destination); |
| 1495 | port = SCM_COERCE_OUTPORT (destination); |
| 1496 | } |
| 1497 | SCM_VALIDATE_STRING (2, message); |
| 1498 | SCM_VALIDATE_REST_ARGUMENT (args); |
| 1499 | |
| 1500 | p = 0; |
| 1501 | start = 0; |
| 1502 | end = scm_i_string_length (message); |
| 1503 | for (p = start; p != end; ++p) |
| 1504 | if (scm_i_string_ref (message, p) == '~') |
| 1505 | { |
| 1506 | if (++p == end) |
| 1507 | break; |
| 1508 | |
| 1509 | switch (scm_i_string_ref (message, p)) |
| 1510 | { |
| 1511 | case 'A': case 'a': |
| 1512 | writingp = 0; |
| 1513 | break; |
| 1514 | case 'S': case 's': |
| 1515 | writingp = 1; |
| 1516 | break; |
| 1517 | case '~': |
| 1518 | scm_lfwrite_substr (message, start, p, port); |
| 1519 | start = p + 1; |
| 1520 | continue; |
| 1521 | case '%': |
| 1522 | scm_lfwrite_substr (message, start, p - 1, port); |
| 1523 | scm_newline (port); |
| 1524 | start = p + 1; |
| 1525 | continue; |
| 1526 | default: |
| 1527 | SCM_MISC_ERROR ("FORMAT: Unsupported format option ~~~A - use (ice-9 format) instead", |
| 1528 | scm_list_1 (SCM_MAKE_CHAR (scm_i_string_ref (message, p)))); |
| 1529 | |
| 1530 | } |
| 1531 | |
| 1532 | |
| 1533 | if (!scm_is_pair (args)) |
| 1534 | SCM_MISC_ERROR ("FORMAT: Missing argument for ~~~A", |
| 1535 | scm_list_1 (SCM_MAKE_CHAR (scm_i_string_ref (message, p)))); |
| 1536 | |
| 1537 | scm_lfwrite_substr (message, start, p - 1, port); |
| 1538 | /* we pass destination here */ |
| 1539 | scm_prin1 (SCM_CAR (args), destination, writingp); |
| 1540 | args = SCM_CDR (args); |
| 1541 | start = p + 1; |
| 1542 | } |
| 1543 | |
| 1544 | scm_lfwrite_substr (message, start, p, port); |
| 1545 | if (!scm_is_eq (args, SCM_EOL)) |
| 1546 | SCM_MISC_ERROR ("FORMAT: ~A superfluous arguments", |
| 1547 | scm_list_1 (scm_length (args))); |
| 1548 | |
| 1549 | if (fReturnString) |
| 1550 | answer = scm_strport_to_string (destination); |
| 1551 | |
| 1552 | return scm_return_first (answer, message); |
| 1553 | } |
| 1554 | #undef FUNC_NAME |
| 1555 | |
| 1556 | |
| 1557 | SCM_DEFINE (scm_newline, "newline", 0, 1, 0, |
| 1558 | (SCM port), |
| 1559 | "Send a newline to @var{port}.\n" |
| 1560 | "If @var{port} is omitted, send to the current output port.") |
| 1561 | #define FUNC_NAME s_scm_newline |
| 1562 | { |
| 1563 | if (SCM_UNBNDP (port)) |
| 1564 | port = scm_current_output_port (); |
| 1565 | |
| 1566 | SCM_VALIDATE_OPORT_VALUE (1, port); |
| 1567 | |
| 1568 | scm_putc_unlocked ('\n', SCM_COERCE_OUTPORT (port)); |
| 1569 | return SCM_UNSPECIFIED; |
| 1570 | } |
| 1571 | #undef FUNC_NAME |
| 1572 | |
| 1573 | SCM_DEFINE (scm_write_char, "write-char", 1, 1, 0, |
| 1574 | (SCM chr, SCM port), |
| 1575 | "Send character @var{chr} to @var{port}.") |
| 1576 | #define FUNC_NAME s_scm_write_char |
| 1577 | { |
| 1578 | if (SCM_UNBNDP (port)) |
| 1579 | port = scm_current_output_port (); |
| 1580 | |
| 1581 | SCM_VALIDATE_CHAR (1, chr); |
| 1582 | SCM_VALIDATE_OPORT_VALUE (2, port); |
| 1583 | |
| 1584 | port = SCM_COERCE_OUTPORT (port); |
| 1585 | if (!display_character (SCM_CHAR (chr), port, |
| 1586 | PORT_CONVERSION_HANDLER (port))) |
| 1587 | scm_encoding_error (__func__, errno, |
| 1588 | "cannot convert to output locale", |
| 1589 | port, chr); |
| 1590 | |
| 1591 | return SCM_UNSPECIFIED; |
| 1592 | } |
| 1593 | #undef FUNC_NAME |
| 1594 | |
| 1595 | \f |
| 1596 | |
| 1597 | /* Call back to Scheme code to do the printing of special objects |
| 1598 | * (like structs). SCM_PRINTER_APPLY applies PROC to EXP and a smob |
| 1599 | * containing PORT and PSTATE. This object can be used as the port for |
| 1600 | * display/write etc to continue the current print chain. The REVEALED |
| 1601 | * field of PSTATE is set to true to indicate that the print state has |
| 1602 | * escaped to Scheme and thus has to be freed by the GC. |
| 1603 | */ |
| 1604 | |
| 1605 | scm_t_bits scm_tc16_port_with_ps; |
| 1606 | |
| 1607 | /* Print exactly as the port itself would */ |
| 1608 | |
| 1609 | static int |
| 1610 | port_with_ps_print (SCM obj, SCM port, scm_print_state *pstate) |
| 1611 | { |
| 1612 | obj = SCM_PORT_WITH_PS_PORT (obj); |
| 1613 | return SCM_PORT_DESCRIPTOR (obj)->print (obj, port, pstate); |
| 1614 | } |
| 1615 | |
| 1616 | SCM |
| 1617 | scm_printer_apply (SCM proc, SCM exp, SCM port, scm_print_state *pstate) |
| 1618 | { |
| 1619 | pstate->revealed = 1; |
| 1620 | return scm_call_2 (proc, exp, |
| 1621 | scm_i_port_with_print_state (port, pstate->handle)); |
| 1622 | } |
| 1623 | |
| 1624 | SCM_DEFINE (scm_port_with_print_state, "port-with-print-state", 1, 1, 0, |
| 1625 | (SCM port, SCM pstate), |
| 1626 | "Create a new port which behaves like @var{port}, but with an\n" |
| 1627 | "included print state @var{pstate}. @var{pstate} is optional.\n" |
| 1628 | "If @var{pstate} isn't supplied and @var{port} already has\n" |
| 1629 | "a print state, the old print state is reused.") |
| 1630 | #define FUNC_NAME s_scm_port_with_print_state |
| 1631 | { |
| 1632 | SCM_VALIDATE_OPORT_VALUE (1, port); |
| 1633 | if (!SCM_UNBNDP (pstate)) |
| 1634 | SCM_VALIDATE_PRINTSTATE (2, pstate); |
| 1635 | return scm_i_port_with_print_state (port, pstate); |
| 1636 | } |
| 1637 | #undef FUNC_NAME |
| 1638 | |
| 1639 | SCM_DEFINE (scm_get_print_state, "get-print-state", 1, 0, 0, |
| 1640 | (SCM port), |
| 1641 | "Return the print state of the port @var{port}. If @var{port}\n" |
| 1642 | "has no associated print state, @code{#f} is returned.") |
| 1643 | #define FUNC_NAME s_scm_get_print_state |
| 1644 | { |
| 1645 | if (SCM_PORT_WITH_PS_P (port)) |
| 1646 | return SCM_PORT_WITH_PS_PS (port); |
| 1647 | if (SCM_OUTPUT_PORT_P (port)) |
| 1648 | return SCM_BOOL_F; |
| 1649 | SCM_WRONG_TYPE_ARG (1, port); |
| 1650 | } |
| 1651 | #undef FUNC_NAME |
| 1652 | |
| 1653 | \f |
| 1654 | |
| 1655 | void |
| 1656 | scm_init_print () |
| 1657 | { |
| 1658 | SCM type; |
| 1659 | |
| 1660 | type = scm_make_vtable (scm_from_locale_string (SCM_PRINT_STATE_LAYOUT), |
| 1661 | SCM_BOOL_F); |
| 1662 | scm_set_struct_vtable_name_x (type, scm_from_latin1_symbol ("print-state")); |
| 1663 | scm_print_state_vtable = type; |
| 1664 | |
| 1665 | /* Don't want to bind a wrapper class in GOOPS, so pass 0 as arg1. */ |
| 1666 | scm_tc16_port_with_ps = scm_make_smob_type (0, 0); |
| 1667 | scm_set_smob_print (scm_tc16_port_with_ps, port_with_ps_print); |
| 1668 | |
| 1669 | #include "libguile/print.x" |
| 1670 | |
| 1671 | scm_init_opts (scm_print_options, scm_print_opts); |
| 1672 | scm_print_opts[SCM_PRINT_HIGHLIGHT_PREFIX_I].val = |
| 1673 | SCM_UNPACK (scm_from_locale_string ("{")); |
| 1674 | scm_print_opts[SCM_PRINT_HIGHLIGHT_SUFFIX_I].val = |
| 1675 | SCM_UNPACK (scm_from_locale_string ("}")); |
| 1676 | scm_print_opts[SCM_PRINT_KEYWORD_STYLE_I].val = SCM_UNPACK (sym_reader); |
| 1677 | } |
| 1678 | |
| 1679 | /* |
| 1680 | Local Variables: |
| 1681 | c-file-style: "gnu" |
| 1682 | End: |
| 1683 | */ |