| 1 | /* Copyright (C) 1995,1996,1997,1998,1999 Free Software Foundation, Inc. |
| 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License as published by |
| 5 | * the Free Software Foundation; either version 2, or (at your option) |
| 6 | * any later version. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License |
| 14 | * along with this software; see the file COPYING. If not, write to |
| 15 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
| 16 | * Boston, MA 02111-1307 USA |
| 17 | * |
| 18 | * As a special exception, the Free Software Foundation gives permission |
| 19 | * for additional uses of the text contained in its release of GUILE. |
| 20 | * |
| 21 | * The exception is that, if you link the GUILE library with other files |
| 22 | * to produce an executable, this does not by itself cause the |
| 23 | * resulting executable to be covered by the GNU General Public License. |
| 24 | * Your use of that executable is in no way restricted on account of |
| 25 | * linking the GUILE library code into it. |
| 26 | * |
| 27 | * This exception does not however invalidate any other reasons why |
| 28 | * the executable file might be covered by the GNU General Public License. |
| 29 | * |
| 30 | * This exception applies only to the code released by the |
| 31 | * Free Software Foundation under the name GUILE. If you copy |
| 32 | * code from other Free Software Foundation releases into a copy of |
| 33 | * GUILE, as the General Public License permits, the exception does |
| 34 | * not apply to the code that you add in this way. To avoid misleading |
| 35 | * anyone as to the status of such modified files, you must delete |
| 36 | * this exception notice from them. |
| 37 | * |
| 38 | * If you write modifications of your own for GUILE, it is your choice |
| 39 | * whether to permit this exception to apply to your modifications. |
| 40 | * If you do not wish that, delete this exception notice. */ |
| 41 | \f |
| 42 | /* Headers. */ |
| 43 | |
| 44 | #include <stdio.h> |
| 45 | #include "_scm.h" |
| 46 | #include "objects.h" |
| 47 | #include "smob.h" |
| 48 | #include "chars.h" |
| 49 | |
| 50 | #include "keywords.h" |
| 51 | |
| 52 | #include "ports.h" |
| 53 | |
| 54 | #ifdef HAVE_MALLOC_H |
| 55 | #include <malloc.h> |
| 56 | #endif |
| 57 | |
| 58 | #ifdef HAVE_UNISTD_H |
| 59 | #include <unistd.h> |
| 60 | #endif |
| 61 | |
| 62 | #ifdef HAVE_SYS_IOCTL_H |
| 63 | #include <sys/ioctl.h> |
| 64 | #endif |
| 65 | |
| 66 | \f |
| 67 | /* The port kind table --- a dynamically resized array of port types. */ |
| 68 | |
| 69 | |
| 70 | /* scm_ptobs scm_numptob |
| 71 | * implement a dynamicly resized array of ptob records. |
| 72 | * Indexes into this table are used when generating type |
| 73 | * tags for smobjects (if you know a tag you can get an index and conversely). |
| 74 | */ |
| 75 | scm_ptob_descriptor *scm_ptobs; |
| 76 | int scm_numptob; |
| 77 | |
| 78 | /* GC marker for a port with stream of SCM type. */ |
| 79 | SCM |
| 80 | scm_markstream (SCM ptr) |
| 81 | { |
| 82 | int openp; |
| 83 | openp = SCM_CAR (ptr) & SCM_OPN; |
| 84 | if (openp) |
| 85 | return SCM_STREAM (ptr); |
| 86 | else |
| 87 | return SCM_BOOL_F; |
| 88 | } |
| 89 | |
| 90 | /* |
| 91 | * We choose to use an interface similar to the smob interface with |
| 92 | * fill_input and write as standard fields, passed to the port |
| 93 | * type constructor, and optional fields set by setters. |
| 94 | */ |
| 95 | |
| 96 | static void flush_void_port (SCM port); |
| 97 | static void end_input_void_port (SCM port, int offset); |
| 98 | static void write_void_port (SCM port, void *data, size_t size); |
| 99 | |
| 100 | long |
| 101 | scm_make_port_type (char *name, |
| 102 | int (*fill_input) (SCM port), |
| 103 | void (*write) (SCM port, void *data, size_t size)) |
| 104 | { |
| 105 | char *tmp; |
| 106 | if (255 <= scm_numptob) |
| 107 | goto ptoberr; |
| 108 | SCM_DEFER_INTS; |
| 109 | SCM_SYSCALL (tmp = (char *) realloc ((char *) scm_ptobs, |
| 110 | (1 + scm_numptob) |
| 111 | * sizeof (scm_ptob_descriptor))); |
| 112 | if (tmp) |
| 113 | { |
| 114 | scm_ptobs = (scm_ptob_descriptor *) tmp; |
| 115 | |
| 116 | scm_ptobs[scm_numptob].name = name; |
| 117 | scm_ptobs[scm_numptob].mark = 0; |
| 118 | scm_ptobs[scm_numptob].free = scm_free0; |
| 119 | scm_ptobs[scm_numptob].print = scm_port_print; |
| 120 | scm_ptobs[scm_numptob].equalp = 0; |
| 121 | scm_ptobs[scm_numptob].close = 0; |
| 122 | |
| 123 | scm_ptobs[scm_numptob].write = write; |
| 124 | scm_ptobs[scm_numptob].flush = flush_void_port; |
| 125 | |
| 126 | scm_ptobs[scm_numptob].end_input = end_input_void_port; |
| 127 | scm_ptobs[scm_numptob].fill_input = fill_input; |
| 128 | scm_ptobs[scm_numptob].input_waiting = 0; |
| 129 | |
| 130 | scm_ptobs[scm_numptob].seek = 0; |
| 131 | scm_ptobs[scm_numptob].truncate = 0; |
| 132 | |
| 133 | scm_numptob++; |
| 134 | } |
| 135 | SCM_ALLOW_INTS; |
| 136 | if (!tmp) |
| 137 | ptoberr:scm_wta (SCM_MAKINUM ((long) scm_numptob), |
| 138 | (char *) SCM_NALLOC, "scm_make_port_type"); |
| 139 | /* Make a class object if Goops is present */ |
| 140 | if (scm_port_class) |
| 141 | scm_make_port_classes (scm_numptob - 1, SCM_PTOBNAME (scm_numptob - 1)); |
| 142 | return scm_tc7_port + (scm_numptob - 1) * 256; |
| 143 | } |
| 144 | |
| 145 | void |
| 146 | scm_set_port_mark (long tc, SCM (*mark) (SCM)) |
| 147 | { |
| 148 | scm_ptobs[SCM_TC2PTOBNUM (tc)].mark = mark; |
| 149 | } |
| 150 | |
| 151 | void |
| 152 | scm_set_port_free (long tc, scm_sizet (*free) (SCM)) |
| 153 | { |
| 154 | scm_ptobs[SCM_TC2PTOBNUM (tc)].free = free; |
| 155 | } |
| 156 | |
| 157 | void |
| 158 | scm_set_port_print (long tc, int (*print) (SCM exp, SCM port, |
| 159 | scm_print_state *pstate)) |
| 160 | { |
| 161 | scm_ptobs[SCM_TC2PTOBNUM (tc)].print = print; |
| 162 | } |
| 163 | |
| 164 | void |
| 165 | scm_set_port_equalp (long tc, SCM (*equalp) (SCM, SCM)) |
| 166 | { |
| 167 | scm_ptobs[SCM_TC2PTOBNUM (tc)].equalp = equalp; |
| 168 | } |
| 169 | |
| 170 | void |
| 171 | scm_set_port_flush (long tc, void (*flush) (SCM port)) |
| 172 | { |
| 173 | scm_ptobs[SCM_TC2PTOBNUM (tc)].flush = flush; |
| 174 | } |
| 175 | |
| 176 | void |
| 177 | scm_set_port_end_input (long tc, void (*end_input) (SCM port, int offset)) |
| 178 | { |
| 179 | scm_ptobs[SCM_TC2PTOBNUM (tc)].end_input = end_input; |
| 180 | } |
| 181 | |
| 182 | void |
| 183 | scm_set_port_close (long tc, int (*close) (SCM)) |
| 184 | { |
| 185 | scm_ptobs[SCM_TC2PTOBNUM (tc)].close = close; |
| 186 | } |
| 187 | |
| 188 | void |
| 189 | scm_set_port_seek (long tc, off_t (*seek) (SCM port, |
| 190 | off_t OFFSET, |
| 191 | int WHENCE)) |
| 192 | { |
| 193 | scm_ptobs[SCM_TC2PTOBNUM (tc)].seek = seek; |
| 194 | } |
| 195 | |
| 196 | void |
| 197 | scm_set_port_truncate (long tc, void (*truncate) (SCM port, off_t length)) |
| 198 | { |
| 199 | scm_ptobs[SCM_TC2PTOBNUM (tc)].truncate = truncate; |
| 200 | } |
| 201 | |
| 202 | void |
| 203 | scm_set_port_input_waiting (long tc, int (*input_waiting) (SCM)) |
| 204 | { |
| 205 | scm_ptobs[SCM_TC2PTOBNUM (tc)].input_waiting = input_waiting; |
| 206 | } |
| 207 | |
| 208 | \f |
| 209 | |
| 210 | SCM_PROC(s_char_ready_p, "char-ready?", 0, 1, 0, scm_char_ready_p); |
| 211 | |
| 212 | SCM |
| 213 | scm_char_ready_p (SCM port) |
| 214 | { |
| 215 | scm_port *pt; |
| 216 | |
| 217 | if (SCM_UNBNDP (port)) |
| 218 | port = scm_cur_inp; |
| 219 | else |
| 220 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPINPORTP (port), port, SCM_ARG1, |
| 221 | s_char_ready_p); |
| 222 | |
| 223 | pt = SCM_PTAB_ENTRY (port); |
| 224 | |
| 225 | /* if the current read buffer is filled, or the |
| 226 | last pushed-back char has been read and the saved buffer is |
| 227 | filled, result is true. */ |
| 228 | if (pt->read_pos < pt->read_end |
| 229 | || (pt->read_buf == pt->putback_buf |
| 230 | && pt->saved_read_pos < pt->saved_read_end)) |
| 231 | return SCM_BOOL_T; |
| 232 | else |
| 233 | { |
| 234 | scm_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (port)]; |
| 235 | |
| 236 | if (ptob->input_waiting) |
| 237 | return (ptob->input_waiting (port)) ? SCM_BOOL_T : SCM_BOOL_F; |
| 238 | else |
| 239 | return SCM_BOOL_T; |
| 240 | } |
| 241 | } |
| 242 | |
| 243 | /* Clear a port's read buffers, returning the contents. */ |
| 244 | SCM_PROC (s_drain_input, "drain-input", 1, 0, 0, scm_drain_input); |
| 245 | SCM |
| 246 | scm_drain_input (SCM port) |
| 247 | { |
| 248 | SCM result; |
| 249 | scm_port *pt = SCM_PTAB_ENTRY (port); |
| 250 | int count; |
| 251 | char *dst; |
| 252 | |
| 253 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPINPORTP (port), port, SCM_ARG1, |
| 254 | s_drain_input); |
| 255 | |
| 256 | count = pt->read_end - pt->read_pos; |
| 257 | if (pt->read_buf == pt->putback_buf) |
| 258 | count += pt->saved_read_end - pt->saved_read_pos; |
| 259 | |
| 260 | result = scm_makstr (count, 0); |
| 261 | dst = SCM_CHARS (result); |
| 262 | |
| 263 | while (pt->read_pos < pt->read_end) |
| 264 | *dst++ = *(pt->read_pos++); |
| 265 | |
| 266 | if (pt->read_buf == pt->putback_buf) |
| 267 | { |
| 268 | while (pt->saved_read_pos < pt->saved_read_end) |
| 269 | *dst++ = *(pt->saved_read_pos++); |
| 270 | } |
| 271 | |
| 272 | return result; |
| 273 | } |
| 274 | |
| 275 | \f |
| 276 | /* Standard ports --- current input, output, error, and more(!). */ |
| 277 | |
| 278 | SCM_PROC(s_current_input_port, "current-input-port", 0, 0, 0, scm_current_input_port); |
| 279 | |
| 280 | SCM |
| 281 | scm_current_input_port () |
| 282 | { |
| 283 | return scm_cur_inp; |
| 284 | } |
| 285 | |
| 286 | SCM_PROC(s_current_output_port, "current-output-port", 0, 0, 0, scm_current_output_port); |
| 287 | |
| 288 | SCM |
| 289 | scm_current_output_port () |
| 290 | { |
| 291 | return scm_cur_outp; |
| 292 | } |
| 293 | |
| 294 | SCM_PROC(s_current_error_port, "current-error-port", 0, 0, 0, scm_current_error_port); |
| 295 | |
| 296 | SCM |
| 297 | scm_current_error_port () |
| 298 | { |
| 299 | return scm_cur_errp; |
| 300 | } |
| 301 | |
| 302 | SCM_PROC(s_current_load_port, "current-load-port", 0, 0, 0, scm_current_load_port); |
| 303 | |
| 304 | SCM |
| 305 | scm_current_load_port () |
| 306 | { |
| 307 | return scm_cur_loadp; |
| 308 | } |
| 309 | |
| 310 | SCM_PROC(s_set_current_input_port, "set-current-input-port", 1, 0, 0, scm_set_current_input_port); |
| 311 | |
| 312 | SCM |
| 313 | scm_set_current_input_port (SCM port) |
| 314 | { |
| 315 | SCM oinp = scm_cur_inp; |
| 316 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPINPORTP (port), port, SCM_ARG1, s_set_current_input_port); |
| 317 | scm_cur_inp = port; |
| 318 | return oinp; |
| 319 | } |
| 320 | |
| 321 | |
| 322 | SCM_PROC(s_set_current_output_port, "set-current-output-port", 1, 0, 0, scm_set_current_output_port); |
| 323 | |
| 324 | SCM |
| 325 | scm_set_current_output_port (SCM port) |
| 326 | { |
| 327 | SCM ooutp = scm_cur_outp; |
| 328 | port = SCM_COERCE_OUTPORT (port); |
| 329 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPOUTPORTP (port), port, SCM_ARG1, s_set_current_output_port); |
| 330 | scm_cur_outp = port; |
| 331 | return ooutp; |
| 332 | } |
| 333 | |
| 334 | |
| 335 | SCM_PROC(s_set_current_error_port, "set-current-error-port", 1, 0, 0, scm_set_current_error_port); |
| 336 | |
| 337 | SCM |
| 338 | scm_set_current_error_port (SCM port) |
| 339 | { |
| 340 | SCM oerrp = scm_cur_errp; |
| 341 | port = SCM_COERCE_OUTPORT (port); |
| 342 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPOUTPORTP (port), port, SCM_ARG1, s_set_current_error_port); |
| 343 | scm_cur_errp = port; |
| 344 | return oerrp; |
| 345 | } |
| 346 | |
| 347 | \f |
| 348 | /* The port table --- an array of pointers to ports. */ |
| 349 | |
| 350 | scm_port **scm_port_table; |
| 351 | |
| 352 | int scm_port_table_size = 0; /* Number of ports in scm_port_table. */ |
| 353 | int scm_port_table_room = 20; /* Size of the array. */ |
| 354 | |
| 355 | /* Add a port to the table. */ |
| 356 | |
| 357 | scm_port * |
| 358 | scm_add_to_port_table (SCM port) |
| 359 | { |
| 360 | scm_port *entry; |
| 361 | |
| 362 | if (scm_port_table_size == scm_port_table_room) |
| 363 | { |
| 364 | void *newt = realloc ((char *) scm_port_table, |
| 365 | (scm_sizet) (sizeof (scm_port *) |
| 366 | * scm_port_table_room * 2)); |
| 367 | if (newt == NULL) |
| 368 | scm_memory_error ("scm_add_to_port_table"); |
| 369 | scm_port_table = (scm_port **) newt; |
| 370 | scm_port_table_room *= 2; |
| 371 | } |
| 372 | entry = (scm_port *) malloc (sizeof (scm_port)); |
| 373 | if (entry == NULL) |
| 374 | scm_memory_error ("scm_add_to_port_table"); |
| 375 | |
| 376 | entry->port = port; |
| 377 | entry->entry = scm_port_table_size; |
| 378 | entry->revealed = 0; |
| 379 | entry->stream = 0; |
| 380 | entry->file_name = SCM_BOOL_F; |
| 381 | entry->line_number = 0; |
| 382 | entry->column_number = 0; |
| 383 | entry->putback_buf = 0; |
| 384 | entry->putback_buf_size = 0; |
| 385 | entry->rw_active = SCM_PORT_NEITHER; |
| 386 | entry->rw_random = 0; |
| 387 | |
| 388 | scm_port_table[scm_port_table_size] = entry; |
| 389 | scm_port_table_size++; |
| 390 | |
| 391 | return entry; |
| 392 | } |
| 393 | |
| 394 | /* Remove a port from the table and destroy it. */ |
| 395 | |
| 396 | void |
| 397 | scm_remove_from_port_table (SCM port) |
| 398 | { |
| 399 | scm_port *p = SCM_PTAB_ENTRY (port); |
| 400 | int i = p->entry; |
| 401 | |
| 402 | if (i >= scm_port_table_size) |
| 403 | scm_wta (port, "Port not in table", "scm_remove_from_port_table"); |
| 404 | if (p->putback_buf) |
| 405 | free (p->putback_buf); |
| 406 | free (p); |
| 407 | /* Since we have just freed slot i we can shrink the table by moving |
| 408 | the last entry to that slot... */ |
| 409 | if (i < scm_port_table_size - 1) |
| 410 | { |
| 411 | scm_port_table[i] = scm_port_table[scm_port_table_size - 1]; |
| 412 | scm_port_table[i]->entry = i; |
| 413 | } |
| 414 | SCM_SETPTAB_ENTRY (port, 0); |
| 415 | scm_port_table_size--; |
| 416 | } |
| 417 | |
| 418 | #ifdef GUILE_DEBUG |
| 419 | /* Undocumented functions for debugging. */ |
| 420 | /* Return the number of ports in the table. */ |
| 421 | |
| 422 | SCM_PROC(s_pt_size, "pt-size", 0, 0, 0, scm_pt_size); |
| 423 | SCM |
| 424 | scm_pt_size () |
| 425 | { |
| 426 | return SCM_MAKINUM (scm_port_table_size); |
| 427 | } |
| 428 | |
| 429 | /* Return the ith member of the port table. */ |
| 430 | SCM_PROC(s_pt_member, "pt-member", 1, 0, 0, scm_pt_member); |
| 431 | SCM |
| 432 | scm_pt_member (SCM member) |
| 433 | { |
| 434 | int i; |
| 435 | SCM_ASSERT (SCM_INUMP (member), member, SCM_ARG1, s_pt_member); |
| 436 | i = SCM_INUM (member); |
| 437 | if (i < 0 || i >= scm_port_table_size) |
| 438 | return SCM_BOOL_F; |
| 439 | else |
| 440 | return scm_port_table[i]->port; |
| 441 | } |
| 442 | #endif |
| 443 | |
| 444 | |
| 445 | \f |
| 446 | /* Revealed counts --- an oddity inherited from SCSH. */ |
| 447 | |
| 448 | /* Find a port in the table and return its revealed count. |
| 449 | Also used by the garbage collector. |
| 450 | */ |
| 451 | |
| 452 | int |
| 453 | scm_revealed_count (SCM port) |
| 454 | { |
| 455 | return SCM_REVEALED(port); |
| 456 | } |
| 457 | |
| 458 | |
| 459 | |
| 460 | /* Return the revealed count for a port. */ |
| 461 | |
| 462 | SCM_PROC(s_port_revealed, "port-revealed", 1, 0, 0, scm_port_revealed); |
| 463 | |
| 464 | SCM |
| 465 | scm_port_revealed (SCM port) |
| 466 | { |
| 467 | port = SCM_COERCE_OUTPORT (port); |
| 468 | SCM_ASSERT (SCM_NIMP (port) && SCM_PORTP (port), port, SCM_ARG1, s_port_revealed); |
| 469 | return SCM_MAKINUM (scm_revealed_count (port)); |
| 470 | } |
| 471 | |
| 472 | /* Set the revealed count for a port. */ |
| 473 | SCM_PROC(s_set_port_revealed_x, "set-port-revealed!", 2, 0, 0, scm_set_port_revealed_x); |
| 474 | |
| 475 | SCM |
| 476 | scm_set_port_revealed_x (SCM port, SCM rcount) |
| 477 | { |
| 478 | port = SCM_COERCE_OUTPORT (port); |
| 479 | SCM_ASSERT (SCM_NIMP (port) && SCM_PORTP (port), |
| 480 | port, SCM_ARG1, s_set_port_revealed_x); |
| 481 | SCM_ASSERT (SCM_INUMP (rcount), rcount, SCM_ARG2, s_set_port_revealed_x); |
| 482 | SCM_REVEALED (port) = SCM_INUM (rcount); |
| 483 | return SCM_UNSPECIFIED; |
| 484 | } |
| 485 | |
| 486 | |
| 487 | \f |
| 488 | /* Retrieving a port's mode. */ |
| 489 | |
| 490 | /* Return the flags that characterize a port based on the mode |
| 491 | * string used to open a file for that port. |
| 492 | * |
| 493 | * See PORT FLAGS in scm.h |
| 494 | */ |
| 495 | |
| 496 | long |
| 497 | scm_mode_bits (char *modes) |
| 498 | { |
| 499 | return (SCM_OPN |
| 500 | | (strchr (modes, 'r') || strchr (modes, '+') ? SCM_RDNG : 0) |
| 501 | | ( strchr (modes, 'w') |
| 502 | || strchr (modes, 'a') |
| 503 | || strchr (modes, '+') ? SCM_WRTNG : 0) |
| 504 | | (strchr (modes, '0') ? SCM_BUF0 : 0) |
| 505 | | (strchr (modes, 'l') ? SCM_BUFLINE : 0)); |
| 506 | } |
| 507 | |
| 508 | |
| 509 | /* Return the mode flags from an open port. |
| 510 | * Some modes such as "append" are only used when opening |
| 511 | * a file and are not returned here. */ |
| 512 | |
| 513 | SCM_PROC(s_port_mode, "port-mode", 1, 0, 0, scm_port_mode); |
| 514 | |
| 515 | SCM |
| 516 | scm_port_mode (SCM port) |
| 517 | { |
| 518 | char modes[3]; |
| 519 | modes[0] = '\0'; |
| 520 | |
| 521 | port = SCM_COERCE_OUTPORT (port); |
| 522 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPPORTP (port), port, SCM_ARG1, s_port_mode); |
| 523 | if (SCM_CAR (port) & SCM_RDNG) { |
| 524 | if (SCM_CAR (port) & SCM_WRTNG) |
| 525 | strcpy (modes, "r+"); |
| 526 | else |
| 527 | strcpy (modes, "r"); |
| 528 | } |
| 529 | else if (SCM_CAR (port) & SCM_WRTNG) |
| 530 | strcpy (modes, "w"); |
| 531 | if (SCM_CAR (port) & SCM_BUF0) |
| 532 | strcat (modes, "0"); |
| 533 | return scm_makfromstr (modes, strlen (modes), 0); |
| 534 | } |
| 535 | |
| 536 | |
| 537 | \f |
| 538 | /* Closing ports. */ |
| 539 | |
| 540 | /* scm_close_port |
| 541 | * Call the close operation on a port object. |
| 542 | * see also scm_close. |
| 543 | */ |
| 544 | SCM_PROC(s_close_port, "close-port", 1, 0, 0, scm_close_port); |
| 545 | |
| 546 | SCM |
| 547 | scm_close_port (SCM port) |
| 548 | { |
| 549 | scm_sizet i; |
| 550 | int rv; |
| 551 | |
| 552 | port = SCM_COERCE_OUTPORT (port); |
| 553 | |
| 554 | SCM_ASSERT (SCM_NIMP (port) && SCM_PORTP (port), port, SCM_ARG1, |
| 555 | s_close_port); |
| 556 | if (SCM_CLOSEDP (port)) |
| 557 | return SCM_BOOL_F; |
| 558 | i = SCM_PTOBNUM (port); |
| 559 | if (scm_ptobs[i].close) |
| 560 | rv = (scm_ptobs[i].close) (port); |
| 561 | else |
| 562 | rv = 0; |
| 563 | scm_remove_from_port_table (port); |
| 564 | SCM_SETAND_CAR (port, ~SCM_OPN); |
| 565 | return (rv < 0) ? SCM_BOOL_F : SCM_BOOL_T; |
| 566 | } |
| 567 | |
| 568 | SCM_PROC(s_close_all_ports_except, "close-all-ports-except", 0, 0, 1, scm_close_all_ports_except); |
| 569 | |
| 570 | SCM |
| 571 | scm_close_all_ports_except (SCM ports) |
| 572 | { |
| 573 | int i = 0; |
| 574 | SCM_ASSERT (SCM_NIMP (ports) && SCM_CONSP (ports), ports, SCM_ARG1, s_close_all_ports_except); |
| 575 | while (i < scm_port_table_size) |
| 576 | { |
| 577 | SCM thisport = scm_port_table[i]->port; |
| 578 | int found = 0; |
| 579 | SCM ports_ptr = ports; |
| 580 | |
| 581 | while (SCM_NNULLP (ports_ptr)) |
| 582 | { |
| 583 | SCM port = SCM_COERCE_OUTPORT (SCM_CAR (ports_ptr)); |
| 584 | if (i == 0) |
| 585 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPPORTP (port), port, SCM_ARG1, s_close_all_ports_except); |
| 586 | if (port == thisport) |
| 587 | found = 1; |
| 588 | ports_ptr = SCM_CDR (ports_ptr); |
| 589 | } |
| 590 | if (found) |
| 591 | i++; |
| 592 | else |
| 593 | /* i is not to be incremented here. */ |
| 594 | scm_close_port (thisport); |
| 595 | } |
| 596 | return SCM_UNSPECIFIED; |
| 597 | } |
| 598 | |
| 599 | |
| 600 | \f |
| 601 | /* Utter miscellany. Gosh, we should clean this up some time. */ |
| 602 | |
| 603 | SCM_PROC(s_input_port_p, "input-port?", 1, 0, 0, scm_input_port_p); |
| 604 | |
| 605 | SCM |
| 606 | scm_input_port_p (SCM x) |
| 607 | { |
| 608 | if (SCM_IMP (x)) |
| 609 | return SCM_BOOL_F; |
| 610 | return SCM_INPORTP (x) ? SCM_BOOL_T : SCM_BOOL_F; |
| 611 | } |
| 612 | |
| 613 | SCM_PROC(s_output_port_p, "output-port?", 1, 0, 0, scm_output_port_p); |
| 614 | |
| 615 | SCM |
| 616 | scm_output_port_p (SCM x) |
| 617 | { |
| 618 | if (SCM_IMP (x)) |
| 619 | return SCM_BOOL_F; |
| 620 | if (SCM_PORT_WITH_PS_P (x)) |
| 621 | x = SCM_PORT_WITH_PS_PORT (x); |
| 622 | return SCM_OUTPORTP (x) ? SCM_BOOL_T : SCM_BOOL_F; |
| 623 | } |
| 624 | |
| 625 | SCM_PROC(s_port_closed_p, "port-closed?", 1, 0, 0, scm_port_closed_p); |
| 626 | SCM |
| 627 | scm_port_closed_p (SCM port) |
| 628 | { |
| 629 | SCM_ASSERT (SCM_NIMP (port) && SCM_PORTP (port), port, SCM_ARG1, |
| 630 | s_port_closed_p); |
| 631 | return SCM_OPPORTP (port) ? SCM_BOOL_F : SCM_BOOL_T; |
| 632 | } |
| 633 | |
| 634 | SCM_PROC(s_eof_object_p, "eof-object?", 1, 0, 0, scm_eof_object_p); |
| 635 | |
| 636 | SCM |
| 637 | scm_eof_object_p (SCM x) |
| 638 | { |
| 639 | return SCM_EOF_OBJECT_P (x) ? SCM_BOOL_T : SCM_BOOL_F; |
| 640 | } |
| 641 | |
| 642 | SCM_PROC(s_force_output, "force-output", 0, 1, 0, scm_force_output); |
| 643 | |
| 644 | SCM |
| 645 | scm_force_output (SCM port) |
| 646 | { |
| 647 | if (SCM_UNBNDP (port)) |
| 648 | port = scm_cur_outp; |
| 649 | else |
| 650 | { |
| 651 | port = SCM_COERCE_OUTPORT (port); |
| 652 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPOUTPORTP (port), port, SCM_ARG1, |
| 653 | s_force_output); |
| 654 | } |
| 655 | scm_flush (port); |
| 656 | return SCM_UNSPECIFIED; |
| 657 | } |
| 658 | |
| 659 | SCM_PROC (s_flush_all_ports, "flush-all-ports", 0, 0, 0, scm_flush_all_ports); |
| 660 | SCM |
| 661 | scm_flush_all_ports () |
| 662 | { |
| 663 | int i; |
| 664 | |
| 665 | for (i = 0; i < scm_port_table_size; i++) |
| 666 | { |
| 667 | if (SCM_OPOUTPORTP (scm_port_table[i]->port)) |
| 668 | scm_flush (scm_port_table[i]->port); |
| 669 | } |
| 670 | return SCM_UNSPECIFIED; |
| 671 | } |
| 672 | |
| 673 | SCM_PROC(s_read_char, "read-char", 0, 1, 0, scm_read_char); |
| 674 | |
| 675 | SCM |
| 676 | scm_read_char (SCM port) |
| 677 | { |
| 678 | int c; |
| 679 | if (SCM_UNBNDP (port)) |
| 680 | port = scm_cur_inp; |
| 681 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPINPORTP (port), port, SCM_ARG1, s_read_char); |
| 682 | c = scm_getc (port); |
| 683 | if (EOF == c) |
| 684 | return SCM_EOF_VAL; |
| 685 | return SCM_MAKICHR (c); |
| 686 | } |
| 687 | |
| 688 | /* this should only be called when the read buffer is empty. it |
| 689 | tries to refill the read buffer. it returns the first char from |
| 690 | the port, which is either EOF or *(pt->read_pos). */ |
| 691 | int |
| 692 | scm_fill_input (SCM port) |
| 693 | { |
| 694 | scm_port *pt = SCM_PTAB_ENTRY (port); |
| 695 | |
| 696 | if (pt->read_buf == pt->putback_buf) |
| 697 | { |
| 698 | /* finished reading put-back chars. */ |
| 699 | pt->read_buf = pt->saved_read_buf; |
| 700 | pt->read_pos = pt->saved_read_pos; |
| 701 | pt->read_end = pt->saved_read_end; |
| 702 | pt->read_buf_size = pt->saved_read_buf_size; |
| 703 | if (pt->read_pos < pt->read_end) |
| 704 | return *(pt->read_pos); |
| 705 | } |
| 706 | return scm_ptobs[SCM_PTOBNUM (port)].fill_input (port); |
| 707 | } |
| 708 | |
| 709 | int |
| 710 | scm_getc (SCM port) |
| 711 | { |
| 712 | int c; |
| 713 | scm_port *pt = SCM_PTAB_ENTRY (port); |
| 714 | |
| 715 | if (pt->rw_active == SCM_PORT_WRITE) |
| 716 | { |
| 717 | /* may be marginally faster than calling scm_flush. */ |
| 718 | scm_ptobs[SCM_PTOBNUM (port)].flush (port); |
| 719 | } |
| 720 | |
| 721 | if (pt->rw_random) |
| 722 | pt->rw_active = SCM_PORT_READ; |
| 723 | |
| 724 | if (pt->read_pos >= pt->read_end) |
| 725 | { |
| 726 | if (scm_fill_input (port) == EOF) |
| 727 | return EOF; |
| 728 | } |
| 729 | |
| 730 | c = *(pt->read_pos++); |
| 731 | |
| 732 | if (c == '\n') |
| 733 | { |
| 734 | SCM_INCLINE (port); |
| 735 | } |
| 736 | else if (c == '\t') |
| 737 | { |
| 738 | SCM_TABCOL (port); |
| 739 | } |
| 740 | else |
| 741 | { |
| 742 | SCM_INCCOL (port); |
| 743 | } |
| 744 | |
| 745 | return c; |
| 746 | } |
| 747 | |
| 748 | void |
| 749 | scm_putc (char c, SCM port) |
| 750 | { |
| 751 | scm_lfwrite (&c, 1, port); |
| 752 | } |
| 753 | |
| 754 | void |
| 755 | scm_puts (char *s, SCM port) |
| 756 | { |
| 757 | scm_lfwrite (s, strlen (s), port); |
| 758 | } |
| 759 | |
| 760 | void |
| 761 | scm_lfwrite (char *ptr, scm_sizet size, SCM port) |
| 762 | { |
| 763 | scm_port *pt = SCM_PTAB_ENTRY (port); |
| 764 | scm_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (port)]; |
| 765 | |
| 766 | if (pt->rw_active == SCM_PORT_READ) |
| 767 | scm_end_input (port); |
| 768 | |
| 769 | ptob->write (port, ptr, size); |
| 770 | |
| 771 | if (pt->rw_random) |
| 772 | pt->rw_active = SCM_PORT_WRITE; |
| 773 | } |
| 774 | |
| 775 | |
| 776 | void |
| 777 | scm_flush (SCM port) |
| 778 | { |
| 779 | scm_sizet i = SCM_PTOBNUM (port); |
| 780 | (scm_ptobs[i].flush) (port); |
| 781 | } |
| 782 | |
| 783 | void |
| 784 | scm_end_input (SCM port) |
| 785 | { |
| 786 | int offset; |
| 787 | scm_port *pt = SCM_PTAB_ENTRY (port); |
| 788 | |
| 789 | if (pt->read_buf == pt->putback_buf) |
| 790 | { |
| 791 | offset = pt->read_end - pt->read_pos; |
| 792 | pt->read_buf = pt->saved_read_buf; |
| 793 | pt->read_pos = pt->saved_read_pos; |
| 794 | pt->read_end = pt->saved_read_end; |
| 795 | pt->read_buf_size = pt->saved_read_buf_size; |
| 796 | } |
| 797 | else |
| 798 | offset = 0; |
| 799 | |
| 800 | scm_ptobs[SCM_PTOBNUM (port)].end_input (port, offset); |
| 801 | } |
| 802 | |
| 803 | \f |
| 804 | |
| 805 | |
| 806 | void |
| 807 | scm_ungetc (int c, SCM port) |
| 808 | { |
| 809 | scm_port *pt = SCM_PTAB_ENTRY (port); |
| 810 | |
| 811 | if (pt->read_buf == pt->putback_buf) |
| 812 | /* already using the put-back buffer. */ |
| 813 | { |
| 814 | /* enlarge putback_buf if necessary. */ |
| 815 | if (pt->read_end == pt->read_buf + pt->read_buf_size |
| 816 | && pt->read_buf == pt->read_pos) |
| 817 | { |
| 818 | int new_size = pt->read_buf_size * 2; |
| 819 | unsigned char *tmp = |
| 820 | (unsigned char *) realloc (pt->putback_buf, new_size); |
| 821 | |
| 822 | if (tmp == NULL) |
| 823 | scm_memory_error ("scm_ungetc"); |
| 824 | pt->read_pos = pt->read_buf = pt->putback_buf = tmp; |
| 825 | pt->read_end = pt->read_buf + pt->read_buf_size; |
| 826 | pt->read_buf_size = pt->putback_buf_size = new_size; |
| 827 | } |
| 828 | |
| 829 | /* shift any existing bytes to buffer + 1. */ |
| 830 | if (pt->read_pos == pt->read_end) |
| 831 | pt->read_end = pt->read_buf + 1; |
| 832 | else if (pt->read_pos != pt->read_buf + 1) |
| 833 | { |
| 834 | int count = pt->read_end - pt->read_pos; |
| 835 | |
| 836 | memmove (pt->read_buf + 1, pt->read_pos, count); |
| 837 | pt->read_end = pt->read_buf + 1 + count; |
| 838 | } |
| 839 | |
| 840 | pt->read_pos = pt->read_buf; |
| 841 | } |
| 842 | else |
| 843 | /* switch to the put-back buffer. */ |
| 844 | { |
| 845 | if (pt->putback_buf == NULL) |
| 846 | { |
| 847 | pt->putback_buf = (char *) malloc (SCM_INITIAL_PUTBACK_BUF_SIZE); |
| 848 | if (pt->putback_buf == NULL) |
| 849 | scm_memory_error ("scm_ungetc"); |
| 850 | pt->putback_buf_size = SCM_INITIAL_PUTBACK_BUF_SIZE; |
| 851 | } |
| 852 | |
| 853 | pt->saved_read_buf = pt->read_buf; |
| 854 | pt->saved_read_pos = pt->read_pos; |
| 855 | pt->saved_read_end = pt->read_end; |
| 856 | pt->saved_read_buf_size = pt->read_buf_size; |
| 857 | |
| 858 | pt->read_pos = pt->read_buf = pt->putback_buf; |
| 859 | pt->read_end = pt->read_buf + 1; |
| 860 | pt->read_buf_size = pt->putback_buf_size; |
| 861 | } |
| 862 | |
| 863 | *pt->read_buf = c; |
| 864 | |
| 865 | if (pt->rw_random) |
| 866 | pt->rw_active = SCM_PORT_READ; |
| 867 | |
| 868 | if (c == '\n') |
| 869 | { |
| 870 | /* What should col be in this case? |
| 871 | * We'll leave it at -1. |
| 872 | */ |
| 873 | SCM_LINUM (port) -= 1; |
| 874 | } |
| 875 | else |
| 876 | SCM_COL(port) -= 1; |
| 877 | } |
| 878 | |
| 879 | |
| 880 | void |
| 881 | scm_ungets (char *s, int n, SCM port) |
| 882 | { |
| 883 | /* This is simple minded and inefficient, but unreading strings is |
| 884 | * probably not a common operation, and remember that line and |
| 885 | * column numbers have to be handled... |
| 886 | * |
| 887 | * Please feel free to write an optimized version! |
| 888 | */ |
| 889 | while (n--) |
| 890 | scm_ungetc (s[n], port); |
| 891 | } |
| 892 | |
| 893 | |
| 894 | SCM_PROC(s_peek_char, "peek-char", 0, 1, 0, scm_peek_char); |
| 895 | |
| 896 | SCM |
| 897 | scm_peek_char (SCM port) |
| 898 | { |
| 899 | int c; |
| 900 | if (SCM_UNBNDP (port)) |
| 901 | port = scm_cur_inp; |
| 902 | else |
| 903 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPINPORTP (port), port, SCM_ARG1, s_peek_char); |
| 904 | c = scm_getc (port); |
| 905 | if (EOF == c) |
| 906 | return SCM_EOF_VAL; |
| 907 | scm_ungetc (c, port); |
| 908 | return SCM_MAKICHR (c); |
| 909 | } |
| 910 | |
| 911 | SCM_PROC (s_unread_char, "unread-char", 2, 0, 0, scm_unread_char); |
| 912 | |
| 913 | SCM |
| 914 | scm_unread_char (SCM cobj, SCM port) |
| 915 | { |
| 916 | int c; |
| 917 | |
| 918 | SCM_ASSERT (SCM_ICHRP (cobj), cobj, SCM_ARG1, s_unread_char); |
| 919 | |
| 920 | if (SCM_UNBNDP (port)) |
| 921 | port = scm_cur_inp; |
| 922 | else |
| 923 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPINPORTP (port), port, SCM_ARG2, s_unread_char); |
| 924 | |
| 925 | |
| 926 | c = SCM_ICHR (cobj); |
| 927 | |
| 928 | scm_ungetc (c, port); |
| 929 | return cobj; |
| 930 | } |
| 931 | |
| 932 | SCM_PROC (s_unread_string, "unread-string", 2, 0, 0, scm_unread_string); |
| 933 | |
| 934 | SCM |
| 935 | scm_unread_string (SCM str, SCM port) |
| 936 | { |
| 937 | SCM_ASSERT (SCM_NIMP (str) && SCM_STRINGP (str), |
| 938 | str, SCM_ARG1, s_unread_string); |
| 939 | |
| 940 | if (SCM_UNBNDP (port)) |
| 941 | port = scm_cur_inp; |
| 942 | else |
| 943 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPINPORTP (port), |
| 944 | port, SCM_ARG2, s_unread_string); |
| 945 | |
| 946 | scm_ungets (SCM_ROUCHARS (str), SCM_LENGTH (str), port); |
| 947 | |
| 948 | return str; |
| 949 | } |
| 950 | |
| 951 | SCM_PROC (s_seek, "seek", 3, 0, 0, scm_seek); |
| 952 | SCM |
| 953 | scm_seek (SCM object, SCM offset, SCM whence) |
| 954 | { |
| 955 | off_t off; |
| 956 | off_t rv; |
| 957 | int how; |
| 958 | |
| 959 | object = SCM_COERCE_OUTPORT (object); |
| 960 | |
| 961 | off = scm_num2long (offset, (char *)SCM_ARG2, s_seek); |
| 962 | SCM_ASSERT (SCM_INUMP (whence), whence, SCM_ARG3, s_seek); |
| 963 | how = SCM_INUM (whence); |
| 964 | if (how != SEEK_SET && how != SEEK_CUR && how != SEEK_END) |
| 965 | scm_out_of_range (s_seek, whence); |
| 966 | if (SCM_NIMP (object) && SCM_OPPORTP (object)) |
| 967 | { |
| 968 | scm_ptob_descriptor *ptob = scm_ptobs + SCM_PTOBNUM (object); |
| 969 | |
| 970 | if (!ptob->seek) |
| 971 | scm_misc_error (s_seek, "port is not seekable", |
| 972 | scm_cons (object, SCM_EOL)); |
| 973 | else |
| 974 | rv = ptob->seek (object, off, how); |
| 975 | } |
| 976 | else /* file descriptor?. */ |
| 977 | { |
| 978 | SCM_ASSERT (SCM_INUMP (object), object, SCM_ARG1, s_seek); |
| 979 | rv = lseek (SCM_INUM (object), off, how); |
| 980 | if (rv == -1) |
| 981 | scm_syserror (s_seek); |
| 982 | } |
| 983 | return scm_long2num (rv); |
| 984 | } |
| 985 | |
| 986 | SCM_PROC (s_truncate_file, "truncate-file", 1, 1, 0, scm_truncate_file); |
| 987 | |
| 988 | SCM |
| 989 | scm_truncate_file (SCM object, SCM length) |
| 990 | { |
| 991 | int rv; |
| 992 | off_t c_length; |
| 993 | |
| 994 | /* object can be a port, fdes or filename. */ |
| 995 | |
| 996 | if (SCM_UNBNDP (length)) |
| 997 | { |
| 998 | /* must supply length if object is a filename. */ |
| 999 | if (SCM_NIMP (object) && SCM_ROSTRINGP (object)) |
| 1000 | scm_wrong_num_args (scm_makfrom0str (s_truncate_file)); |
| 1001 | |
| 1002 | length = scm_seek (object, SCM_INUM0, SCM_MAKINUM (SEEK_CUR)); |
| 1003 | } |
| 1004 | c_length = scm_num2long (length, (char *)SCM_ARG2, s_truncate_file); |
| 1005 | if (c_length < 0) |
| 1006 | scm_misc_error (s_truncate_file, "negative offset", SCM_EOL); |
| 1007 | |
| 1008 | object = SCM_COERCE_OUTPORT (object); |
| 1009 | if (SCM_INUMP (object)) |
| 1010 | { |
| 1011 | SCM_SYSCALL (rv = ftruncate (SCM_INUM (object), c_length)); |
| 1012 | } |
| 1013 | else if (SCM_NIMP (object) && SCM_OPOUTPORTP (object)) |
| 1014 | { |
| 1015 | scm_port *pt = SCM_PTAB_ENTRY (object); |
| 1016 | scm_ptob_descriptor *ptob = scm_ptobs + SCM_PTOBNUM (object); |
| 1017 | |
| 1018 | if (!ptob->truncate) |
| 1019 | scm_misc_error (s_truncate_file, "port is not truncatable", SCM_EOL); |
| 1020 | if (pt->rw_active == SCM_PORT_READ) |
| 1021 | scm_end_input (object); |
| 1022 | else if (pt->rw_active == SCM_PORT_WRITE) |
| 1023 | ptob->flush (object); |
| 1024 | |
| 1025 | ptob->truncate (object, c_length); |
| 1026 | rv = 0; |
| 1027 | } |
| 1028 | else |
| 1029 | { |
| 1030 | SCM_ASSERT (SCM_NIMP (object) && SCM_ROSTRINGP (object), |
| 1031 | object, SCM_ARG1, s_truncate_file); |
| 1032 | SCM_COERCE_SUBSTR (object); |
| 1033 | SCM_SYSCALL (rv = truncate (SCM_ROCHARS (object), c_length)); |
| 1034 | } |
| 1035 | if (rv == -1) |
| 1036 | scm_syserror (s_truncate_file); |
| 1037 | return SCM_UNSPECIFIED; |
| 1038 | } |
| 1039 | |
| 1040 | SCM_PROC (s_port_line, "port-line", 1, 0, 0, scm_port_line); |
| 1041 | |
| 1042 | SCM |
| 1043 | scm_port_line (SCM port) |
| 1044 | { |
| 1045 | port = SCM_COERCE_OUTPORT (port); |
| 1046 | SCM_ASSERT (SCM_NIMP (port) && SCM_PORTP (port) && SCM_OPENP (port), |
| 1047 | port, |
| 1048 | SCM_ARG1, |
| 1049 | s_port_line); |
| 1050 | return SCM_MAKINUM (SCM_LINUM (port)); |
| 1051 | } |
| 1052 | |
| 1053 | SCM_PROC (s_set_port_line_x, "set-port-line!", 2, 0, 0, scm_set_port_line_x); |
| 1054 | |
| 1055 | SCM |
| 1056 | scm_set_port_line_x (SCM port, SCM line) |
| 1057 | { |
| 1058 | port = SCM_COERCE_OUTPORT (port); |
| 1059 | SCM_ASSERT (SCM_NIMP (port) && SCM_PORTP (port) && SCM_OPENP (port), |
| 1060 | port, |
| 1061 | SCM_ARG1, |
| 1062 | s_set_port_line_x); |
| 1063 | SCM_ASSERT (SCM_INUMP (line), line, SCM_ARG2, s_set_port_line_x); |
| 1064 | return SCM_PTAB_ENTRY (port)->line_number = SCM_INUM (line); |
| 1065 | } |
| 1066 | |
| 1067 | SCM_PROC (s_port_column, "port-column", 1, 0, 0, scm_port_column); |
| 1068 | |
| 1069 | SCM |
| 1070 | scm_port_column (SCM port) |
| 1071 | { |
| 1072 | port = SCM_COERCE_OUTPORT (port); |
| 1073 | SCM_ASSERT (SCM_NIMP (port) && SCM_PORTP (port) && SCM_OPENP (port), |
| 1074 | port, |
| 1075 | SCM_ARG1, |
| 1076 | s_port_column); |
| 1077 | return SCM_MAKINUM (SCM_COL (port)); |
| 1078 | } |
| 1079 | |
| 1080 | SCM_PROC (s_set_port_column_x, "set-port-column!", 2, 0, 0, scm_set_port_column_x); |
| 1081 | |
| 1082 | SCM |
| 1083 | scm_set_port_column_x (SCM port, SCM column) |
| 1084 | { |
| 1085 | port = SCM_COERCE_OUTPORT (port); |
| 1086 | SCM_ASSERT (SCM_NIMP (port) && SCM_PORTP (port) && SCM_OPENP (port), |
| 1087 | port, |
| 1088 | SCM_ARG1, |
| 1089 | s_set_port_column_x); |
| 1090 | SCM_ASSERT (SCM_INUMP (column), column, SCM_ARG2, s_set_port_column_x); |
| 1091 | return SCM_PTAB_ENTRY (port)->column_number = SCM_INUM (column); |
| 1092 | } |
| 1093 | |
| 1094 | SCM_PROC (s_port_filename, "port-filename", 1, 0, 0, scm_port_filename); |
| 1095 | |
| 1096 | SCM |
| 1097 | scm_port_filename (SCM port) |
| 1098 | { |
| 1099 | port = SCM_COERCE_OUTPORT (port); |
| 1100 | SCM_ASSERT (SCM_NIMP (port) && SCM_PORTP (port) && SCM_OPENP (port), |
| 1101 | port, |
| 1102 | SCM_ARG1, |
| 1103 | s_port_filename); |
| 1104 | return SCM_PTAB_ENTRY (port)->file_name; |
| 1105 | } |
| 1106 | |
| 1107 | SCM_PROC (s_set_port_filename_x, "set-port-filename!", 2, 0, 0, scm_set_port_filename_x); |
| 1108 | |
| 1109 | SCM |
| 1110 | scm_set_port_filename_x (SCM port, SCM filename) |
| 1111 | { |
| 1112 | port = SCM_COERCE_OUTPORT (port); |
| 1113 | SCM_ASSERT (SCM_NIMP (port) && SCM_PORTP (port) && SCM_OPENP (port), |
| 1114 | port, |
| 1115 | SCM_ARG1, |
| 1116 | s_set_port_filename_x); |
| 1117 | /* We allow the user to set the filename to whatever he likes. */ |
| 1118 | return SCM_PTAB_ENTRY (port)->file_name = filename; |
| 1119 | } |
| 1120 | |
| 1121 | #ifndef ttyname |
| 1122 | extern char * ttyname(); |
| 1123 | #endif |
| 1124 | |
| 1125 | void |
| 1126 | scm_print_port_mode (SCM exp, SCM port) |
| 1127 | { |
| 1128 | scm_puts (SCM_CLOSEDP (exp) |
| 1129 | ? "closed: " |
| 1130 | : (SCM_RDNG & SCM_CAR (exp) |
| 1131 | ? (SCM_WRTNG & SCM_CAR (exp) |
| 1132 | ? "input-output: " |
| 1133 | : "input: ") |
| 1134 | : (SCM_WRTNG & SCM_CAR (exp) |
| 1135 | ? "output: " |
| 1136 | : "bogus: ")), |
| 1137 | port); |
| 1138 | } |
| 1139 | |
| 1140 | int |
| 1141 | scm_port_print (SCM exp, SCM port, scm_print_state *pstate) |
| 1142 | { |
| 1143 | char *type = SCM_PTOBNAME (SCM_PTOBNUM (exp)); |
| 1144 | if (!type) |
| 1145 | type = "port"; |
| 1146 | scm_puts ("#<", port); |
| 1147 | scm_print_port_mode (exp, port); |
| 1148 | scm_puts (type, port); |
| 1149 | scm_putc (' ', port); |
| 1150 | scm_intprint (SCM_CDR (exp), 16, port); |
| 1151 | scm_putc ('>', port); |
| 1152 | return 1; |
| 1153 | } |
| 1154 | |
| 1155 | extern void scm_make_fptob (); |
| 1156 | extern void scm_make_stptob (); |
| 1157 | extern void scm_make_sfptob (); |
| 1158 | |
| 1159 | void |
| 1160 | scm_ports_prehistory () |
| 1161 | { |
| 1162 | scm_numptob = 0; |
| 1163 | scm_ptobs = (scm_ptob_descriptor *) malloc (sizeof (scm_ptob_descriptor)); |
| 1164 | |
| 1165 | /* WARNING: These scm_newptob calls must be done in this order. |
| 1166 | * They must agree with the port declarations in tags.h. |
| 1167 | */ |
| 1168 | /* scm_tc16_fport = */ scm_make_fptob (); |
| 1169 | /* scm_tc16_pipe was here */ scm_make_fptob (); /* dummy. */ |
| 1170 | /* scm_tc16_strport = */ scm_make_stptob (); |
| 1171 | /* scm_tc16_sfport = */ scm_make_sfptob (); |
| 1172 | } |
| 1173 | |
| 1174 | \f |
| 1175 | |
| 1176 | /* Void ports. */ |
| 1177 | |
| 1178 | long scm_tc16_void_port = 0; |
| 1179 | |
| 1180 | static void |
| 1181 | flush_void_port (SCM port) |
| 1182 | { |
| 1183 | } |
| 1184 | |
| 1185 | static void |
| 1186 | end_input_void_port (SCM port, int offset) |
| 1187 | { |
| 1188 | } |
| 1189 | |
| 1190 | static void |
| 1191 | write_void_port (SCM port, void *data, size_t size) |
| 1192 | { |
| 1193 | } |
| 1194 | |
| 1195 | SCM |
| 1196 | scm_void_port (char *mode_str) |
| 1197 | { |
| 1198 | int mode_bits; |
| 1199 | SCM answer; |
| 1200 | scm_port * pt; |
| 1201 | |
| 1202 | SCM_NEWCELL (answer); |
| 1203 | SCM_DEFER_INTS; |
| 1204 | mode_bits = scm_mode_bits (mode_str); |
| 1205 | pt = scm_add_to_port_table (answer); |
| 1206 | SCM_SETPTAB_ENTRY (answer, pt); |
| 1207 | SCM_SETSTREAM (answer, 0); |
| 1208 | SCM_SETCAR (answer, scm_tc16_void_port | mode_bits); |
| 1209 | SCM_ALLOW_INTS; |
| 1210 | return answer; |
| 1211 | } |
| 1212 | |
| 1213 | |
| 1214 | SCM_PROC (s_sys_make_void_port, "%make-void-port", 1, 0, 0, scm_sys_make_void_port); |
| 1215 | |
| 1216 | SCM |
| 1217 | scm_sys_make_void_port (SCM mode) |
| 1218 | { |
| 1219 | SCM_ASSERT (SCM_NIMP (mode) && SCM_ROSTRINGP (mode), mode, |
| 1220 | SCM_ARG1, s_sys_make_void_port); |
| 1221 | |
| 1222 | SCM_COERCE_SUBSTR (mode); |
| 1223 | return scm_void_port (SCM_ROCHARS (mode)); |
| 1224 | } |
| 1225 | |
| 1226 | \f |
| 1227 | /* Initialization. */ |
| 1228 | |
| 1229 | void |
| 1230 | scm_init_ports () |
| 1231 | { |
| 1232 | /* lseek() symbols. */ |
| 1233 | scm_sysintern ("SEEK_SET", SCM_MAKINUM (SEEK_SET)); |
| 1234 | scm_sysintern ("SEEK_CUR", SCM_MAKINUM (SEEK_CUR)); |
| 1235 | scm_sysintern ("SEEK_END", SCM_MAKINUM (SEEK_END)); |
| 1236 | |
| 1237 | scm_tc16_void_port = scm_make_port_type ("void", 0, write_void_port); |
| 1238 | #include "ports.x" |
| 1239 | } |