1/* 2 SDL - Simple DirectMedia Layer 3 Copyright (C) 1997-2012 Sam Lantinga 4 5 This library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 This library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with this library; if not, write to the Free Software 17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 18 19 Sam Lantinga 20 slouken@libsdl.org 21*/ 22#include "SDL_config.h" 23 24/* This file provides a general interface for SDL to read and write 25 data sources. It can easily be extended to files, memory, etc. 26*/ 27 28#include "SDL_endian.h" 29#include "SDL_rwops.h" 30 31 32#if defined(__WIN32__) && !defined(__SYMBIAN32__) 33 34/* Functions to read/write Win32 API file pointers */ 35/* Will not use it on WinCE because stdio is buffered, it means 36 faster, and all stdio functions anyway are embedded in coredll.dll - 37 the main wince dll*/ 38 39#define WINDOWS_LEAN_AND_MEAN 40#include <windows.h> 41 42#ifndef INVALID_SET_FILE_POINTER 43#define INVALID_SET_FILE_POINTER 0xFFFFFFFF 44#endif 45 46#define READAHEAD_BUFFER_SIZE 1024 47 48static int SDLCALL win32_file_open(SDL_RWops *context, const char *filename, const char *mode) 49{ 50#ifndef _WIN32_WCE 51 UINT old_error_mode; 52#endif 53 HANDLE h; 54 DWORD r_right, w_right; 55 DWORD must_exist, truncate; 56 int a_mode; 57 58 if (!context) 59 return -1; /* failed (invalid call) */ 60 61 context->hidden.win32io.h = INVALID_HANDLE_VALUE; /* mark this as unusable */ 62 context->hidden.win32io.buffer.data = NULL; 63 context->hidden.win32io.buffer.size = 0; 64 context->hidden.win32io.buffer.left = 0; 65 66 /* "r" = reading, file must exist */ 67 /* "w" = writing, truncate existing, file may not exist */ 68 /* "r+"= reading or writing, file must exist */ 69 /* "a" = writing, append file may not exist */ 70 /* "a+"= append + read, file may not exist */ 71 /* "w+" = read, write, truncate. file may not exist */ 72 73 must_exist = ( SDL_strchr(mode,'r') != NULL ) ? OPEN_EXISTING : 0; 74 truncate = ( SDL_strchr(mode,'w') != NULL ) ? CREATE_ALWAYS : 0; 75 r_right = ( SDL_strchr(mode,'+') != NULL || must_exist ) ? GENERIC_READ : 0; 76 a_mode = ( SDL_strchr(mode,'a') != NULL ) ? OPEN_ALWAYS : 0; 77 w_right = ( a_mode || SDL_strchr(mode,'+') || truncate ) ? GENERIC_WRITE : 0; 78 79 if (!r_right && !w_right) /* inconsistent mode */ 80 return -1; /* failed (invalid call) */ 81 82 context->hidden.win32io.buffer.data = (char *)SDL_malloc(READAHEAD_BUFFER_SIZE); 83 if (!context->hidden.win32io.buffer.data) { 84 SDL_OutOfMemory(); 85 return -1; 86 } 87 88#ifdef _WIN32_WCE 89 { 90 size_t size = SDL_strlen(filename)+1; 91 wchar_t *filenameW = SDL_stack_alloc(wchar_t, size); 92 93 if ( MultiByteToWideChar(CP_UTF8, 0, filename, -1, filenameW, size) == 0 ) { 94 SDL_stack_free(filenameW); 95 SDL_free(context->hidden.win32io.buffer.data); 96 context->hidden.win32io.buffer.data = NULL; 97 SDL_SetError("Unable to convert filename to Unicode"); 98 return -1; 99 } 100 h = CreateFile(filenameW, (w_right|r_right), (w_right)? 0 : FILE_SHARE_READ, 101 NULL, (must_exist|truncate|a_mode), FILE_ATTRIBUTE_NORMAL,NULL); 102 SDL_stack_free(filenameW); 103 } 104#else 105 { 106 107 /* handle Unicode filenames. We do some tapdancing here to make sure this 108 works on Win9x, which doesn't support anything but 1-byte codepages. */ 109 const size_t size = SDL_strlen(filename)+1; 110 static int unicode_support = -1; 111 112 if (unicode_support == -1) { 113 OSVERSIONINFO osVerInfo; /* Information about the OS */ 114 osVerInfo.dwOSVersionInfoSize = sizeof(osVerInfo); 115 if (!GetVersionEx(&osVerInfo)) { 116 unicode_support = 0; 117 } else if (osVerInfo.dwPlatformId != VER_PLATFORM_WIN32_WINDOWS) { 118 unicode_support = 1; /* Not Win95/98/ME. */ 119 } else { 120 unicode_support = 0; 121 } 122 } 123 124 if (unicode_support) { /* everything but Win95/98/ME. */ 125 wchar_t *filenameW = SDL_stack_alloc(wchar_t, size); 126 if ( MultiByteToWideChar(CP_UTF8, 0, filename, -1, filenameW, size) == 0 ) { 127 SDL_stack_free(filenameW); 128 SDL_free(context->hidden.win32io.buffer.data); 129 context->hidden.win32io.buffer.data = NULL; 130 SDL_SetError("Unable to convert filename to Unicode"); 131 return -1; 132 } 133 134 /* Do not open a dialog box if failure */ 135 old_error_mode = SetErrorMode(SEM_NOOPENFILEERRORBOX|SEM_FAILCRITICALERRORS); 136 h = CreateFileW(filenameW, (w_right|r_right), (w_right)? 0 : FILE_SHARE_READ, 137 NULL, (must_exist|truncate|a_mode), FILE_ATTRIBUTE_NORMAL,NULL); 138 /* restore old behaviour */ 139 SetErrorMode(old_error_mode); 140 141 SDL_stack_free(filenameW); 142 } else { 143 /* CP_UTF8 might not be supported (Win95), so use SDL_iconv to get wchars. */ 144 /* Use UCS2: no UTF-16 support here. Try again in SDL 1.3. :) */ 145 char *utf16 = SDL_iconv_string("UCS2", "UTF8", filename, SDL_strlen(filename) + 1); 146 char *filenameA = SDL_stack_alloc(char, size * 6); /* 6, just in case. */ 147 BOOL bDefCharUsed = FALSE; 148 149 /* Dither down to a codepage and hope for the best. */ 150 if (!utf16 || 151 !WideCharToMultiByte(CP_ACP, 0, (LPCWSTR)utf16, -1, filenameA, size*6, 0, &bDefCharUsed) || 152 bDefCharUsed) { 153 SDL_stack_free(filenameA); 154 SDL_free(utf16); 155 SDL_free(context->hidden.win32io.buffer.data); 156 context->hidden.win32io.buffer.data = NULL; 157 SDL_SetError("Unable to convert filename to Unicode"); 158 return -1; 159 } 160 161 /* Do not open a dialog box if failure */ 162 old_error_mode = SetErrorMode(SEM_NOOPENFILEERRORBOX|SEM_FAILCRITICALERRORS); 163 h = CreateFile(filenameA, (w_right|r_right), (w_right)? 0 : FILE_SHARE_READ, 164 NULL, (must_exist|truncate|a_mode), FILE_ATTRIBUTE_NORMAL,NULL); 165 /* restore old behaviour */ 166 SetErrorMode(old_error_mode); 167 168 SDL_stack_free(filenameA); 169 SDL_free(utf16); 170 } 171 172 } 173#endif /* _WIN32_WCE */ 174 175 if (h==INVALID_HANDLE_VALUE) { 176 SDL_free(context->hidden.win32io.buffer.data); 177 context->hidden.win32io.buffer.data = NULL; 178 SDL_SetError("Couldn't open %s",filename); 179 return -2; /* failed (CreateFile) */ 180 } 181 context->hidden.win32io.h = h; 182 context->hidden.win32io.append = a_mode; 183 184 return 0; /* ok */ 185} 186static int SDLCALL win32_file_seek(SDL_RWops *context, int offset, int whence) 187{ 188 DWORD win32whence; 189 int file_pos; 190 191 if (!context || context->hidden.win32io.h == INVALID_HANDLE_VALUE) { 192 SDL_SetError("win32_file_seek: invalid context/file not opened"); 193 return -1; 194 } 195 196 /* FIXME: We may be able to satisfy the seek within buffered data */ 197 if (whence == RW_SEEK_CUR && context->hidden.win32io.buffer.left) { 198 offset -= context->hidden.win32io.buffer.left; 199 } 200 context->hidden.win32io.buffer.left = 0; 201 202 switch (whence) { 203 case RW_SEEK_SET: 204 win32whence = FILE_BEGIN; break; 205 case RW_SEEK_CUR: 206 win32whence = FILE_CURRENT; break; 207 case RW_SEEK_END: 208 win32whence = FILE_END; break; 209 default: 210 SDL_SetError("win32_file_seek: Unknown value for 'whence'"); 211 return -1; 212 } 213 214 file_pos = SetFilePointer(context->hidden.win32io.h,offset,NULL,win32whence); 215 216 if ( file_pos != INVALID_SET_FILE_POINTER ) 217 return file_pos; /* success */ 218 219 SDL_Error(SDL_EFSEEK); 220 return -1; /* error */ 221} 222static int SDLCALL win32_file_read(SDL_RWops *context, void *ptr, int size, int maxnum) 223{ 224 int total_need; 225 int total_read = 0; 226 int read_ahead; 227 DWORD byte_read; 228 229 total_need = size*maxnum; 230 231 if (!context || context->hidden.win32io.h == INVALID_HANDLE_VALUE || total_need<=0 || !size) 232 return 0; 233 234 if (context->hidden.win32io.buffer.left > 0) { 235 void *data = (char *)context->hidden.win32io.buffer.data + 236 context->hidden.win32io.buffer.size - 237 context->hidden.win32io.buffer.left; 238 read_ahead = SDL_min(total_need, context->hidden.win32io.buffer.left); 239 SDL_memcpy(ptr, data, read_ahead); 240 context->hidden.win32io.buffer.left -= read_ahead; 241 242 if (read_ahead == total_need) { 243 return maxnum; 244 } 245 ptr = (char *)ptr + read_ahead; 246 total_need -= read_ahead; 247 total_read += read_ahead; 248 } 249 250 if (total_need < READAHEAD_BUFFER_SIZE) { 251 if (!ReadFile(context->hidden.win32io.h,context->hidden.win32io.buffer.data,READAHEAD_BUFFER_SIZE,&byte_read,NULL)) { 252 SDL_Error(SDL_EFREAD); 253 return 0; 254 } 255 read_ahead = SDL_min(total_need, (int)byte_read); 256 SDL_memcpy(ptr, context->hidden.win32io.buffer.data, read_ahead); 257 context->hidden.win32io.buffer.size = byte_read; 258 context->hidden.win32io.buffer.left = byte_read-read_ahead; 259 total_read += read_ahead; 260 } else { 261 if (!ReadFile(context->hidden.win32io.h,ptr,total_need,&byte_read,NULL)) { 262 SDL_Error(SDL_EFREAD); 263 return 0; 264 } 265 total_read += byte_read; 266 } 267 return (total_read/size); 268} 269static int SDLCALL win32_file_write(SDL_RWops *context, const void *ptr, int size, int num) 270{ 271 272 int total_bytes; 273 DWORD byte_written,nwritten; 274 275 total_bytes = size*num; 276 277 if (!context || context->hidden.win32io.h==INVALID_HANDLE_VALUE || total_bytes<=0 || !size) 278 return 0; 279 280 if (context->hidden.win32io.buffer.left) { 281 SetFilePointer(context->hidden.win32io.h,-context->hidden.win32io.buffer.left,NULL,FILE_CURRENT); 282 context->hidden.win32io.buffer.left = 0; 283 } 284 285 /* if in append mode, we must go to the EOF before write */ 286 if (context->hidden.win32io.append) { 287 if ( SetFilePointer(context->hidden.win32io.h,0L,NULL,FILE_END) == INVALID_SET_FILE_POINTER ) { 288 SDL_Error(SDL_EFWRITE); 289 return 0; 290 } 291 } 292 293 if (!WriteFile(context->hidden.win32io.h,ptr,total_bytes,&byte_written,NULL)) { 294 SDL_Error(SDL_EFWRITE); 295 return 0; 296 } 297 298 nwritten = byte_written/size; 299 return nwritten; 300} 301static int SDLCALL win32_file_close(SDL_RWops *context) 302{ 303 304 if ( context ) { 305 if (context->hidden.win32io.h != INVALID_HANDLE_VALUE) { 306 CloseHandle(context->hidden.win32io.h); 307 context->hidden.win32io.h = INVALID_HANDLE_VALUE; /* to be sure */ 308 } 309 if (context->hidden.win32io.buffer.data) { 310 SDL_free(context->hidden.win32io.buffer.data); 311 context->hidden.win32io.buffer.data = NULL; 312 } 313 SDL_FreeRW(context); 314 } 315 return(0); 316} 317#endif /* __WIN32__ */ 318 319#ifdef HAVE_STDIO_H 320 321/* Functions to read/write stdio file pointers */ 322 323static int SDLCALL stdio_seek(SDL_RWops *context, int offset, int whence) 324{ 325 if ( fseek(context->hidden.stdio.fp, offset, whence) == 0 ) { 326 return(ftell(context->hidden.stdio.fp)); 327 } else { 328 SDL_Error(SDL_EFSEEK); 329 return(-1); 330 } 331} 332static int SDLCALL stdio_read(SDL_RWops *context, void *ptr, int size, int maxnum) 333{ 334 size_t nread; 335 336 nread = fread(ptr, size, maxnum, context->hidden.stdio.fp); 337 if ( nread == 0 && ferror(context->hidden.stdio.fp) ) { 338 SDL_Error(SDL_EFREAD); 339 } 340 return(nread); 341} 342static int SDLCALL stdio_write(SDL_RWops *context, const void *ptr, int size, int num) 343{ 344 size_t nwrote; 345 346 nwrote = fwrite(ptr, size, num, context->hidden.stdio.fp); 347 if ( nwrote == 0 && ferror(context->hidden.stdio.fp) ) { 348 SDL_Error(SDL_EFWRITE); 349 } 350 return(nwrote); 351} 352static int SDLCALL stdio_close(SDL_RWops *context) 353{ 354 if ( context ) { 355 if ( context->hidden.stdio.autoclose ) { 356 /* WARNING: Check the return value here! */ 357 fclose(context->hidden.stdio.fp); 358 } 359 SDL_FreeRW(context); 360 } 361 return(0); 362} 363#endif /* !HAVE_STDIO_H */ 364 365/* Functions to read/write memory pointers */ 366 367static int SDLCALL mem_seek(SDL_RWops *context, int offset, int whence) 368{ 369 Uint8 *newpos; 370 371 switch (whence) { 372 case RW_SEEK_SET: 373 newpos = context->hidden.mem.base+offset; 374 break; 375 case RW_SEEK_CUR: 376 newpos = context->hidden.mem.here+offset; 377 break; 378 case RW_SEEK_END: 379 newpos = context->hidden.mem.stop+offset; 380 break; 381 default: 382 SDL_SetError("Unknown value for 'whence'"); 383 return(-1); 384 } 385 if ( newpos < context->hidden.mem.base ) { 386 newpos = context->hidden.mem.base; 387 } 388 if ( newpos > context->hidden.mem.stop ) { 389 newpos = context->hidden.mem.stop; 390 } 391 context->hidden.mem.here = newpos; 392 return(context->hidden.mem.here-context->hidden.mem.base); 393} 394static int SDLCALL mem_read(SDL_RWops *context, void *ptr, int size, int maxnum) 395{ 396 size_t total_bytes; 397 size_t mem_available; 398 399 total_bytes = (maxnum * size); 400 if ( (maxnum <= 0) || (size <= 0) || ((total_bytes / maxnum) != (size_t) size) ) { 401 return 0; 402 } 403 404 mem_available = (context->hidden.mem.stop - context->hidden.mem.here); 405 if (total_bytes > mem_available) { 406 total_bytes = mem_available; 407 } 408 409 SDL_memcpy(ptr, context->hidden.mem.here, total_bytes); 410 context->hidden.mem.here += total_bytes; 411 412 return (total_bytes / size); 413} 414static int SDLCALL mem_write(SDL_RWops *context, const void *ptr, int size, int num) 415{ 416 if ( (context->hidden.mem.here + (num*size)) > context->hidden.mem.stop ) { 417 num = (context->hidden.mem.stop-context->hidden.mem.here)/size; 418 } 419 SDL_memcpy(context->hidden.mem.here, ptr, num*size); 420 context->hidden.mem.here += num*size; 421 return(num); 422} 423static int SDLCALL mem_writeconst(SDL_RWops *context, const void *ptr, int size, int num) 424{ 425 SDL_SetError("Can't write to read-only memory"); 426 return(-1); 427} 428static int SDLCALL mem_close(SDL_RWops *context) 429{ 430 if ( context ) { 431 SDL_FreeRW(context); 432 } 433 return(0); 434} 435 436 437/* Functions to create SDL_RWops structures from various data sources */ 438 439#ifdef __MACOS__ 440/* 441 * translate unix-style slash-separated filename to mac-style colon-separated 442 * name; return malloced string 443 */ 444static char *unix_to_mac(const char *file) 445{ 446 int flen = SDL_strlen(file); 447 char *path = SDL_malloc(flen + 2); 448 const char *src = file; 449 char *dst = path; 450 if(*src == '/') { 451 /* really depends on filesystem layout, hope for the best */ 452 src++; 453 } else { 454 /* Check if this is a MacOS path to begin with */ 455 if(*src != ':') 456 *dst++ = ':'; /* relative paths begin with ':' */ 457 } 458 while(src < file + flen) { 459 const char *end = SDL_strchr(src, '/'); 460 int len; 461 if(!end) 462 end = file + flen; /* last component */ 463 len = end - src; 464 if(len == 0 || (len == 1 && src[0] == '.')) { 465 /* remove repeated slashes and . */ 466 } else { 467 if(len == 2 && src[0] == '.' && src[1] == '.') { 468 /* replace .. with the empty string */ 469 } else { 470 SDL_memcpy(dst, src, len); 471 dst += len; 472 } 473 if(end < file + flen) 474 *dst++ = ':'; 475 } 476 src = end + 1; 477 } 478 *dst++ = '\0'; 479 return path; 480} 481#endif /* __MACOS__ */ 482 483SDL_RWops *SDL_RWFromFile(const char *file, const char *mode) 484{ 485 SDL_RWops *rwops = NULL; 486#ifdef HAVE_STDIO_H 487 FILE *fp = NULL; 488 (void) fp; 489#endif 490 if ( !file || !*file || !mode || !*mode ) { 491 SDL_SetError("SDL_RWFromFile(): No file or no mode specified"); 492 return NULL; 493 } 494 495#if defined(__WIN32__) && !defined(__SYMBIAN32__) 496 rwops = SDL_AllocRW(); 497 if (!rwops) 498 return NULL; /* SDL_SetError already setup by SDL_AllocRW() */ 499 if (win32_file_open(rwops,file,mode) < 0) { 500 SDL_FreeRW(rwops); 501 return NULL; 502 } 503 rwops->seek = win32_file_seek; 504 rwops->read = win32_file_read; 505 rwops->write = win32_file_write; 506 rwops->close = win32_file_close; 507 508#elif HAVE_STDIO_H 509 510#ifdef __MACOS__ 511 { 512 char *mpath = unix_to_mac(file); 513 fp = fopen(mpath, mode); 514 SDL_free(mpath); 515 } 516#else 517 fp = fopen(file, mode); 518#endif 519 if ( fp == NULL ) { 520 SDL_SetError("Couldn't open %s", file); 521 } else { 522 rwops = SDL_RWFromFP(fp, 1); 523 } 524#else 525 SDL_SetError("SDL not compiled with stdio support"); 526#endif /* !HAVE_STDIO_H */ 527 528 return(rwops); 529} 530 531#ifdef HAVE_STDIO_H 532SDL_RWops *SDL_RWFromFP(FILE *fp, int autoclose) 533{ 534 SDL_RWops *rwops = NULL; 535 536 rwops = SDL_AllocRW(); 537 if ( rwops != NULL ) { 538 rwops->seek = stdio_seek; 539 rwops->read = stdio_read; 540 rwops->write = stdio_write; 541 rwops->close = stdio_close; 542 rwops->hidden.stdio.fp = fp; 543 rwops->hidden.stdio.autoclose = autoclose; 544 } 545 return(rwops); 546} 547#endif /* HAVE_STDIO_H */ 548 549SDL_RWops *SDL_RWFromMem(void *mem, int size) 550{ 551 SDL_RWops *rwops; 552 553 rwops = SDL_AllocRW(); 554 if ( rwops != NULL ) { 555 rwops->seek = mem_seek; 556 rwops->read = mem_read; 557 rwops->write = mem_write; 558 rwops->close = mem_close; 559 rwops->hidden.mem.base = (Uint8 *)mem; 560 rwops->hidden.mem.here = rwops->hidden.mem.base; 561 rwops->hidden.mem.stop = rwops->hidden.mem.base+size; 562 } 563 return(rwops); 564} 565 566SDL_RWops *SDL_RWFromConstMem(const void *mem, int size) 567{ 568 SDL_RWops *rwops; 569 570 rwops = SDL_AllocRW(); 571 if ( rwops != NULL ) { 572 rwops->seek = mem_seek; 573 rwops->read = mem_read; 574 rwops->write = mem_writeconst; 575 rwops->close = mem_close; 576 rwops->hidden.mem.base = (Uint8 *)mem; 577 rwops->hidden.mem.here = rwops->hidden.mem.base; 578 rwops->hidden.mem.stop = rwops->hidden.mem.base+size; 579 } 580 return(rwops); 581} 582 583SDL_RWops *SDL_AllocRW(void) 584{ 585 SDL_RWops *area; 586 587 area = (SDL_RWops *)SDL_malloc(sizeof *area); 588 if ( area == NULL ) { 589 SDL_OutOfMemory(); 590 } 591 return(area); 592} 593 594void SDL_FreeRW(SDL_RWops *area) 595{ 596 SDL_free(area); 597} 598 599/* Functions for dynamically reading and writing endian-specific values */ 600 601Uint16 SDL_ReadLE16 (SDL_RWops *src) 602{ 603 Uint16 value; 604 605 SDL_RWread(src, &value, (sizeof value), 1); 606 return(SDL_SwapLE16(value)); 607} 608Uint16 SDL_ReadBE16 (SDL_RWops *src) 609{ 610 Uint16 value; 611 612 SDL_RWread(src, &value, (sizeof value), 1); 613 return(SDL_SwapBE16(value)); 614} 615Uint32 SDL_ReadLE32 (SDL_RWops *src) 616{ 617 Uint32 value; 618 619 SDL_RWread(src, &value, (sizeof value), 1); 620 return(SDL_SwapLE32(value)); 621} 622Uint32 SDL_ReadBE32 (SDL_RWops *src) 623{ 624 Uint32 value; 625 626 SDL_RWread(src, &value, (sizeof value), 1); 627 return(SDL_SwapBE32(value)); 628} 629Uint64 SDL_ReadLE64 (SDL_RWops *src) 630{ 631 Uint64 value; 632 633 SDL_RWread(src, &value, (sizeof value), 1); 634 return(SDL_SwapLE64(value)); 635} 636Uint64 SDL_ReadBE64 (SDL_RWops *src) 637{ 638 Uint64 value; 639 640 SDL_RWread(src, &value, (sizeof value), 1); 641 return(SDL_SwapBE64(value)); 642} 643 644int SDL_WriteLE16 (SDL_RWops *dst, Uint16 value) 645{ 646 value = SDL_SwapLE16(value); 647 return(SDL_RWwrite(dst, &value, (sizeof value), 1)); 648} 649int SDL_WriteBE16 (SDL_RWops *dst, Uint16 value) 650{ 651 value = SDL_SwapBE16(value); 652 return(SDL_RWwrite(dst, &value, (sizeof value), 1)); 653} 654int SDL_WriteLE32 (SDL_RWops *dst, Uint32 value) 655{ 656 value = SDL_SwapLE32(value); 657 return(SDL_RWwrite(dst, &value, (sizeof value), 1)); 658} 659int SDL_WriteBE32 (SDL_RWops *dst, Uint32 value) 660{ 661 value = SDL_SwapBE32(value); 662 return(SDL_RWwrite(dst, &value, (sizeof value), 1)); 663} 664int SDL_WriteLE64 (SDL_RWops *dst, Uint64 value) 665{ 666 value = SDL_SwapLE64(value); 667 return(SDL_RWwrite(dst, &value, (sizeof value), 1)); 668} 669int SDL_WriteBE64 (SDL_RWops *dst, Uint64 value) 670{ 671 value = SDL_SwapBE64(value); 672 return(SDL_RWwrite(dst, &value, (sizeof value), 1)); 673} 674