| 1 | /* Copyright (C) 2010-2020 The RetroArch team |
| 2 | * |
| 3 | * --------------------------------------------------------------------------------------- |
| 4 | * The following license statement only applies to this file (file_stream.c). |
| 5 | * --------------------------------------------------------------------------------------- |
| 6 | * |
| 7 | * Permission is hereby granted, free of charge, |
| 8 | * to any person obtaining a copy of this software and associated documentation files (the "Software"), |
| 9 | * to deal in the Software without restriction, including without limitation the rights to |
| 10 | * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, |
| 11 | * and to permit persons to whom the Software is furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, |
| 16 | * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| 18 | * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
| 19 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 21 | */ |
| 22 | |
| 23 | #include <stdio.h> |
| 24 | #include <stdlib.h> |
| 25 | #include <string.h> |
| 26 | #include <stdarg.h> |
| 27 | #include <ctype.h> |
| 28 | |
| 29 | #ifdef HAVE_CONFIG_H |
| 30 | #include "config.h" |
| 31 | #endif |
| 32 | |
| 33 | #ifdef _MSC_VER |
| 34 | #include <compat/msvc.h> |
| 35 | #endif |
| 36 | |
| 37 | #include <string/stdstring.h> |
| 38 | #include <streams/file_stream.h> |
| 39 | #define VFS_FRONTEND |
| 40 | #include <vfs/vfs_implementation.h> |
| 41 | |
| 42 | #define VFS_ERROR_RETURN_VALUE -1 |
| 43 | |
| 44 | struct RFILE |
| 45 | { |
| 46 | struct retro_vfs_file_handle *hfile; |
| 47 | bool error_flag; |
| 48 | }; |
| 49 | |
| 50 | static retro_vfs_get_path_t filestream_get_path_cb = NULL; |
| 51 | static retro_vfs_open_t filestream_open_cb = NULL; |
| 52 | static retro_vfs_close_t filestream_close_cb = NULL; |
| 53 | static retro_vfs_size_t filestream_size_cb = NULL; |
| 54 | static retro_vfs_truncate_t filestream_truncate_cb = NULL; |
| 55 | static retro_vfs_tell_t filestream_tell_cb = NULL; |
| 56 | static retro_vfs_seek_t filestream_seek_cb = NULL; |
| 57 | static retro_vfs_read_t filestream_read_cb = NULL; |
| 58 | static retro_vfs_write_t filestream_write_cb = NULL; |
| 59 | static retro_vfs_flush_t filestream_flush_cb = NULL; |
| 60 | static retro_vfs_remove_t filestream_remove_cb = NULL; |
| 61 | static retro_vfs_rename_t filestream_rename_cb = NULL; |
| 62 | |
| 63 | /* VFS Initialization */ |
| 64 | |
| 65 | void filestream_vfs_init(const struct retro_vfs_interface_info* vfs_info) |
| 66 | { |
| 67 | const struct retro_vfs_interface * |
| 68 | vfs_iface = vfs_info->iface; |
| 69 | |
| 70 | filestream_get_path_cb = NULL; |
| 71 | filestream_open_cb = NULL; |
| 72 | filestream_close_cb = NULL; |
| 73 | filestream_tell_cb = NULL; |
| 74 | filestream_size_cb = NULL; |
| 75 | filestream_truncate_cb = NULL; |
| 76 | filestream_seek_cb = NULL; |
| 77 | filestream_read_cb = NULL; |
| 78 | filestream_write_cb = NULL; |
| 79 | filestream_flush_cb = NULL; |
| 80 | filestream_remove_cb = NULL; |
| 81 | filestream_rename_cb = NULL; |
| 82 | |
| 83 | if ( |
| 84 | (vfs_info->required_interface_version < |
| 85 | FILESTREAM_REQUIRED_VFS_VERSION) |
| 86 | || !vfs_iface) |
| 87 | return; |
| 88 | |
| 89 | filestream_get_path_cb = vfs_iface->get_path; |
| 90 | filestream_open_cb = vfs_iface->open; |
| 91 | filestream_close_cb = vfs_iface->close; |
| 92 | filestream_size_cb = vfs_iface->size; |
| 93 | filestream_truncate_cb = vfs_iface->truncate; |
| 94 | filestream_tell_cb = vfs_iface->tell; |
| 95 | filestream_seek_cb = vfs_iface->seek; |
| 96 | filestream_read_cb = vfs_iface->read; |
| 97 | filestream_write_cb = vfs_iface->write; |
| 98 | filestream_flush_cb = vfs_iface->flush; |
| 99 | filestream_remove_cb = vfs_iface->remove; |
| 100 | filestream_rename_cb = vfs_iface->rename; |
| 101 | } |
| 102 | |
| 103 | /* Callback wrappers */ |
| 104 | bool filestream_exists(const char *path) |
| 105 | { |
| 106 | RFILE *dummy = NULL; |
| 107 | |
| 108 | if (!path || !*path) |
| 109 | return false; |
| 110 | if (!(dummy = filestream_open( |
| 111 | path, |
| 112 | RETRO_VFS_FILE_ACCESS_READ, |
| 113 | RETRO_VFS_FILE_ACCESS_HINT_NONE))) |
| 114 | return false; |
| 115 | |
| 116 | if (filestream_close(dummy) != 0) |
| 117 | free(dummy); |
| 118 | |
| 119 | dummy = NULL; |
| 120 | return true; |
| 121 | } |
| 122 | |
| 123 | int64_t filestream_get_size(RFILE *stream) |
| 124 | { |
| 125 | int64_t output; |
| 126 | |
| 127 | if (filestream_size_cb) |
| 128 | output = filestream_size_cb(stream->hfile); |
| 129 | else |
| 130 | output = retro_vfs_file_size_impl( |
| 131 | (libretro_vfs_implementation_file*)stream->hfile); |
| 132 | |
| 133 | if (output == VFS_ERROR_RETURN_VALUE) |
| 134 | stream->error_flag = true; |
| 135 | |
| 136 | return output; |
| 137 | } |
| 138 | |
| 139 | int64_t filestream_truncate(RFILE *stream, int64_t length) |
| 140 | { |
| 141 | int64_t output; |
| 142 | |
| 143 | if (filestream_truncate_cb) |
| 144 | output = filestream_truncate_cb(stream->hfile, length); |
| 145 | else |
| 146 | output = retro_vfs_file_truncate_impl( |
| 147 | (libretro_vfs_implementation_file*)stream->hfile, length); |
| 148 | |
| 149 | if (output == VFS_ERROR_RETURN_VALUE) |
| 150 | stream->error_flag = true; |
| 151 | |
| 152 | return output; |
| 153 | } |
| 154 | |
| 155 | /** |
| 156 | * filestream_open: |
| 157 | * @path : path to file |
| 158 | * @mode : file mode to use when opening (read/write) |
| 159 | * @hints : |
| 160 | * |
| 161 | * Opens a file for reading or writing, depending on the requested mode. |
| 162 | * @return A pointer to an RFILE if opened successfully, otherwise NULL. |
| 163 | **/ |
| 164 | RFILE* filestream_open(const char *path, unsigned mode, unsigned hints) |
| 165 | { |
| 166 | struct retro_vfs_file_handle *fp = NULL; |
| 167 | RFILE* output = NULL; |
| 168 | |
| 169 | if (filestream_open_cb) |
| 170 | fp = (struct retro_vfs_file_handle*) |
| 171 | filestream_open_cb(path, mode, hints); |
| 172 | else |
| 173 | fp = (struct retro_vfs_file_handle*) |
| 174 | retro_vfs_file_open_impl(path, mode, hints); |
| 175 | |
| 176 | if (!fp) |
| 177 | return NULL; |
| 178 | |
| 179 | output = (RFILE*)malloc(sizeof(RFILE)); |
| 180 | output->error_flag = false; |
| 181 | output->hfile = fp; |
| 182 | return output; |
| 183 | } |
| 184 | |
| 185 | char* filestream_gets(RFILE *stream, char *s, size_t len) |
| 186 | { |
| 187 | int c = 0; |
| 188 | char *p = s; |
| 189 | if (!stream) |
| 190 | return NULL; |
| 191 | |
| 192 | /* get max bytes or up to a newline */ |
| 193 | |
| 194 | for (len--; len > 0; len--) |
| 195 | { |
| 196 | if ((c = filestream_getc(stream)) == EOF) |
| 197 | break; |
| 198 | *p++ = c; |
| 199 | if (c == '\n') |
| 200 | break; |
| 201 | } |
| 202 | *p = 0; |
| 203 | |
| 204 | if (p == s && c == EOF) |
| 205 | return NULL; |
| 206 | return (s); |
| 207 | } |
| 208 | |
| 209 | int filestream_getc(RFILE *stream) |
| 210 | { |
| 211 | char c = 0; |
| 212 | if (stream && filestream_read(stream, &c, 1) == 1) |
| 213 | return (int)(unsigned char)c; |
| 214 | return EOF; |
| 215 | } |
| 216 | |
| 217 | int filestream_vscanf(RFILE *stream, const char* format, va_list *args) |
| 218 | { |
| 219 | char buf[4096]; |
| 220 | char subfmt[64]; |
| 221 | va_list args_copy; |
| 222 | const char *bufiter = buf; |
| 223 | int ret = 0; |
| 224 | int64_t startpos = filestream_tell(stream); |
| 225 | int64_t maxlen = filestream_read(stream, buf, sizeof(buf)-1); |
| 226 | |
| 227 | if (maxlen <= 0) |
| 228 | return EOF; |
| 229 | |
| 230 | buf[maxlen] = '\0'; |
| 231 | |
| 232 | /* Have to copy the input va_list here |
| 233 | * > Calling va_arg() on 'args' directly would |
| 234 | * cause the va_list to have an indeterminate value |
| 235 | * in the function calling filestream_vscanf(), |
| 236 | * leading to unexpected behaviour */ |
| 237 | #ifdef __va_copy |
| 238 | __va_copy(args_copy, *args); |
| 239 | #else |
| 240 | va_copy(args_copy, *args); |
| 241 | #endif |
| 242 | |
| 243 | while (*format) |
| 244 | { |
| 245 | if (*format == '%') |
| 246 | { |
| 247 | int sublen; |
| 248 | char* subfmtiter = subfmt; |
| 249 | bool asterisk = false; |
| 250 | |
| 251 | *subfmtiter++ = *format++; /* '%' */ |
| 252 | |
| 253 | /* %[*][width][length]specifier */ |
| 254 | |
| 255 | if (*format == '*') |
| 256 | { |
| 257 | asterisk = true; |
| 258 | *subfmtiter++ = *format++; |
| 259 | } |
| 260 | |
| 261 | while (ISDIGIT((unsigned char)*format)) |
| 262 | *subfmtiter++ = *format++; /* width */ |
| 263 | |
| 264 | /* length */ |
| 265 | if (*format == 'h' || *format == 'l') |
| 266 | { |
| 267 | if (format[1] == format[0]) |
| 268 | *subfmtiter++ = *format++; |
| 269 | *subfmtiter++ = *format++; |
| 270 | } |
| 271 | else if ( |
| 272 | *format == 'j' || |
| 273 | *format == 'z' || |
| 274 | *format == 't' || |
| 275 | *format == 'L') |
| 276 | { |
| 277 | *subfmtiter++ = *format++; |
| 278 | } |
| 279 | |
| 280 | /* specifier - always a single character (except ]) */ |
| 281 | if (*format == '[') |
| 282 | { |
| 283 | while (*format != ']') |
| 284 | *subfmtiter++ = *format++; |
| 285 | *subfmtiter++ = *format++; |
| 286 | } |
| 287 | else |
| 288 | *subfmtiter++ = *format++; |
| 289 | |
| 290 | *subfmtiter++ = '%'; |
| 291 | *subfmtiter++ = 'n'; |
| 292 | *subfmtiter++ = '\0'; |
| 293 | |
| 294 | if (sizeof(void*) != sizeof(long*)) |
| 295 | abort(); /* all pointers must have the same size */ |
| 296 | |
| 297 | if (asterisk) |
| 298 | { |
| 299 | int v = sscanf(bufiter, subfmt, &sublen); |
| 300 | if (v == EOF) |
| 301 | return EOF; |
| 302 | if (v != 0) |
| 303 | break; |
| 304 | } |
| 305 | else |
| 306 | { |
| 307 | int v = sscanf(bufiter, subfmt, va_arg(args_copy, void*), &sublen); |
| 308 | if (v == EOF) |
| 309 | return EOF; |
| 310 | if (v != 1) |
| 311 | break; |
| 312 | } |
| 313 | |
| 314 | ret++; |
| 315 | bufiter += sublen; |
| 316 | } |
| 317 | else if (isspace((unsigned char)*format)) |
| 318 | { |
| 319 | while (isspace((unsigned char)*bufiter)) |
| 320 | bufiter++; |
| 321 | format++; |
| 322 | } |
| 323 | else |
| 324 | { |
| 325 | if (*bufiter != *format) |
| 326 | break; |
| 327 | bufiter++; |
| 328 | format++; |
| 329 | } |
| 330 | } |
| 331 | |
| 332 | va_end(args_copy); |
| 333 | filestream_seek(stream, startpos + (bufiter - buf), |
| 334 | RETRO_VFS_SEEK_POSITION_START); |
| 335 | |
| 336 | return ret; |
| 337 | } |
| 338 | |
| 339 | int filestream_scanf(RFILE *stream, const char* format, ...) |
| 340 | { |
| 341 | int result; |
| 342 | va_list vl; |
| 343 | va_start(vl, format); |
| 344 | result = filestream_vscanf(stream, format, &vl); |
| 345 | va_end(vl); |
| 346 | return result; |
| 347 | } |
| 348 | |
| 349 | int64_t filestream_seek(RFILE *stream, int64_t offset, int seek_position) |
| 350 | { |
| 351 | int64_t output; |
| 352 | |
| 353 | if (filestream_seek_cb) |
| 354 | output = filestream_seek_cb(stream->hfile, offset, seek_position); |
| 355 | else |
| 356 | output = retro_vfs_file_seek_impl( |
| 357 | (libretro_vfs_implementation_file*)stream->hfile, |
| 358 | offset, seek_position); |
| 359 | |
| 360 | if (output == VFS_ERROR_RETURN_VALUE) |
| 361 | stream->error_flag = true; |
| 362 | |
| 363 | return output; |
| 364 | } |
| 365 | |
| 366 | int filestream_eof(RFILE *stream) |
| 367 | { |
| 368 | return filestream_tell(stream) == filestream_get_size(stream) ? EOF : 0; |
| 369 | } |
| 370 | |
| 371 | int64_t filestream_tell(RFILE *stream) |
| 372 | { |
| 373 | int64_t output; |
| 374 | |
| 375 | if (filestream_size_cb) |
| 376 | output = filestream_tell_cb(stream->hfile); |
| 377 | else |
| 378 | output = retro_vfs_file_tell_impl( |
| 379 | (libretro_vfs_implementation_file*)stream->hfile); |
| 380 | |
| 381 | if (output == VFS_ERROR_RETURN_VALUE) |
| 382 | stream->error_flag = true; |
| 383 | |
| 384 | return output; |
| 385 | } |
| 386 | |
| 387 | void filestream_rewind(RFILE *stream) |
| 388 | { |
| 389 | if (!stream) |
| 390 | return; |
| 391 | filestream_seek(stream, 0L, RETRO_VFS_SEEK_POSITION_START); |
| 392 | stream->error_flag = false; |
| 393 | } |
| 394 | |
| 395 | int64_t filestream_read(RFILE *stream, void *s, int64_t len) |
| 396 | { |
| 397 | int64_t output; |
| 398 | |
| 399 | if (filestream_read_cb) |
| 400 | output = filestream_read_cb(stream->hfile, s, len); |
| 401 | else |
| 402 | output = retro_vfs_file_read_impl( |
| 403 | (libretro_vfs_implementation_file*)stream->hfile, s, len); |
| 404 | |
| 405 | if (output == VFS_ERROR_RETURN_VALUE) |
| 406 | stream->error_flag = true; |
| 407 | |
| 408 | return output; |
| 409 | } |
| 410 | |
| 411 | int filestream_flush(RFILE *stream) |
| 412 | { |
| 413 | int output; |
| 414 | |
| 415 | if (filestream_flush_cb) |
| 416 | output = filestream_flush_cb(stream->hfile); |
| 417 | else |
| 418 | output = retro_vfs_file_flush_impl( |
| 419 | (libretro_vfs_implementation_file*)stream->hfile); |
| 420 | |
| 421 | if (output == VFS_ERROR_RETURN_VALUE) |
| 422 | stream->error_flag = true; |
| 423 | |
| 424 | return output; |
| 425 | } |
| 426 | |
| 427 | int filestream_delete(const char *path) |
| 428 | { |
| 429 | if (filestream_remove_cb) |
| 430 | return filestream_remove_cb(path); |
| 431 | |
| 432 | return retro_vfs_file_remove_impl(path); |
| 433 | } |
| 434 | |
| 435 | int filestream_rename(const char *old_path, const char *new_path) |
| 436 | { |
| 437 | if (filestream_rename_cb) |
| 438 | return filestream_rename_cb(old_path, new_path); |
| 439 | |
| 440 | return retro_vfs_file_rename_impl(old_path, new_path); |
| 441 | } |
| 442 | |
| 443 | const char* filestream_get_path(RFILE *stream) |
| 444 | { |
| 445 | if (filestream_get_path_cb) |
| 446 | return filestream_get_path_cb(stream->hfile); |
| 447 | |
| 448 | return retro_vfs_file_get_path_impl( |
| 449 | (libretro_vfs_implementation_file*)stream->hfile); |
| 450 | } |
| 451 | |
| 452 | int64_t filestream_write(RFILE *stream, const void *s, int64_t len) |
| 453 | { |
| 454 | int64_t output; |
| 455 | |
| 456 | if (filestream_write_cb) |
| 457 | output = filestream_write_cb(stream->hfile, s, len); |
| 458 | else |
| 459 | output = retro_vfs_file_write_impl( |
| 460 | (libretro_vfs_implementation_file*)stream->hfile, s, len); |
| 461 | |
| 462 | if (output == VFS_ERROR_RETURN_VALUE) |
| 463 | stream->error_flag = true; |
| 464 | |
| 465 | return output; |
| 466 | } |
| 467 | |
| 468 | int filestream_putc(RFILE *stream, int c) |
| 469 | { |
| 470 | char c_char = (char)c; |
| 471 | if (!stream) |
| 472 | return EOF; |
| 473 | return filestream_write(stream, &c_char, 1) == 1 |
| 474 | ? (int)(unsigned char)c |
| 475 | : EOF; |
| 476 | } |
| 477 | |
| 478 | int filestream_vprintf(RFILE *stream, const char* format, va_list args) |
| 479 | { |
| 480 | static char buffer[8 * 1024]; |
| 481 | int64_t num_chars = vsnprintf(buffer, sizeof(buffer), |
| 482 | format, args); |
| 483 | |
| 484 | if (num_chars < 0) |
| 485 | return -1; |
| 486 | else if (num_chars == 0) |
| 487 | return 0; |
| 488 | |
| 489 | return (int)filestream_write(stream, buffer, num_chars); |
| 490 | } |
| 491 | |
| 492 | int filestream_printf(RFILE *stream, const char* format, ...) |
| 493 | { |
| 494 | va_list vl; |
| 495 | int result; |
| 496 | va_start(vl, format); |
| 497 | result = filestream_vprintf(stream, format, vl); |
| 498 | va_end(vl); |
| 499 | return result; |
| 500 | } |
| 501 | |
| 502 | int filestream_error(RFILE *stream) |
| 503 | { |
| 504 | return (stream && stream->error_flag); |
| 505 | } |
| 506 | |
| 507 | int filestream_close(RFILE *stream) |
| 508 | { |
| 509 | int output; |
| 510 | struct retro_vfs_file_handle* fp = stream->hfile; |
| 511 | |
| 512 | if (filestream_close_cb) |
| 513 | output = filestream_close_cb(fp); |
| 514 | else |
| 515 | output = retro_vfs_file_close_impl( |
| 516 | (libretro_vfs_implementation_file*)fp); |
| 517 | |
| 518 | if (output == 0) |
| 519 | free(stream); |
| 520 | |
| 521 | return output; |
| 522 | } |
| 523 | |
| 524 | /** |
| 525 | * filestream_read_file: |
| 526 | * @path : path to file. |
| 527 | * @buf : buffer to allocate and read the contents of the |
| 528 | * file into. Needs to be freed manually. |
| 529 | * @len : optional output integer containing bytes read. |
| 530 | * |
| 531 | * Read the contents of a file into @buf. |
| 532 | * |
| 533 | * @return Non-zero on success. |
| 534 | */ |
| 535 | int64_t filestream_read_file(const char *path, void **buf, int64_t *len) |
| 536 | { |
| 537 | int64_t ret = 0; |
| 538 | int64_t content_buf_size = 0; |
| 539 | void *content_buf = NULL; |
| 540 | RFILE *file = filestream_open(path, |
| 541 | RETRO_VFS_FILE_ACCESS_READ, |
| 542 | RETRO_VFS_FILE_ACCESS_HINT_NONE); |
| 543 | |
| 544 | if (!file) |
| 545 | { |
| 546 | *buf = NULL; |
| 547 | return 0; |
| 548 | } |
| 549 | |
| 550 | if ((content_buf_size = filestream_get_size(file)) < 0) |
| 551 | goto error; |
| 552 | |
| 553 | if (!(content_buf = malloc((size_t)(content_buf_size + 1)))) |
| 554 | goto error; |
| 555 | if ((int64_t)(uint64_t)(content_buf_size + 1) != (content_buf_size + 1)) |
| 556 | goto error; |
| 557 | |
| 558 | if ((ret = filestream_read(file, content_buf, (int64_t)content_buf_size)) < |
| 559 | 0) |
| 560 | goto error; |
| 561 | |
| 562 | if (filestream_close(file) != 0) |
| 563 | free(file); |
| 564 | |
| 565 | *buf = content_buf; |
| 566 | |
| 567 | /* Allow for easy reading of strings to be safe. |
| 568 | * Will only work with sane character formatting (Unix). */ |
| 569 | ((char*)content_buf)[ret] = '\0'; |
| 570 | |
| 571 | if (len) |
| 572 | *len = ret; |
| 573 | |
| 574 | return 1; |
| 575 | |
| 576 | error: |
| 577 | if (filestream_close(file) != 0) |
| 578 | free(file); |
| 579 | if (content_buf) |
| 580 | free(content_buf); |
| 581 | if (len) |
| 582 | *len = -1; |
| 583 | *buf = NULL; |
| 584 | return 0; |
| 585 | } |
| 586 | |
| 587 | /** |
| 588 | * filestream_write_file: |
| 589 | * @path : path to file. |
| 590 | * @data : contents to write to the file. |
| 591 | * @size : size of the contents. |
| 592 | * |
| 593 | * Writes data to a file. |
| 594 | * |
| 595 | * @return true on success, otherwise false. |
| 596 | **/ |
| 597 | bool filestream_write_file(const char *path, const void *data, int64_t size) |
| 598 | { |
| 599 | int64_t ret = 0; |
| 600 | RFILE *file = filestream_open(path, |
| 601 | RETRO_VFS_FILE_ACCESS_WRITE, |
| 602 | RETRO_VFS_FILE_ACCESS_HINT_NONE); |
| 603 | if (!file) |
| 604 | return false; |
| 605 | ret = filestream_write(file, data, size); |
| 606 | if (filestream_close(file) != 0) |
| 607 | free(file); |
| 608 | return (ret == size); |
| 609 | } |
| 610 | |
| 611 | /** |
| 612 | * filestream_getline: |
| 613 | * |
| 614 | * Returned pointer must be freed by the caller. |
| 615 | **/ |
| 616 | char *filestream_getline(RFILE *stream) |
| 617 | { |
| 618 | char *newline_tmp = NULL; |
| 619 | size_t cur_size = 8; |
| 620 | size_t idx = 0; |
| 621 | int in = 0; |
| 622 | char *newline = (char*)malloc(9); |
| 623 | |
| 624 | if (!stream || !newline) |
| 625 | { |
| 626 | if (newline) |
| 627 | free(newline); |
| 628 | return NULL; |
| 629 | } |
| 630 | |
| 631 | in = filestream_getc(stream); |
| 632 | |
| 633 | while (in != EOF && in != '\n') |
| 634 | { |
| 635 | if (idx == cur_size) |
| 636 | { |
| 637 | cur_size *= 2; |
| 638 | |
| 639 | if (!(newline_tmp = (char*)realloc(newline, cur_size + 1))) |
| 640 | { |
| 641 | free(newline); |
| 642 | return NULL; |
| 643 | } |
| 644 | |
| 645 | newline = newline_tmp; |
| 646 | } |
| 647 | |
| 648 | newline[idx++] = in; |
| 649 | in = filestream_getc(stream); |
| 650 | } |
| 651 | |
| 652 | newline[idx] = '\0'; |
| 653 | return newline; |
| 654 | } |
| 655 | |
| 656 | libretro_vfs_implementation_file* filestream_get_vfs_handle(RFILE *stream) |
| 657 | { |
| 658 | return (libretro_vfs_implementation_file*)stream->hfile; |
| 659 | } |