aboutsummaryrefslogtreecommitdiffstats
path: root/distrib/sdl-1.2.12/src/file/SDL_rwops.c
diff options
context:
space:
mode:
Diffstat (limited to 'distrib/sdl-1.2.12/src/file/SDL_rwops.c')
-rw-r--r--distrib/sdl-1.2.12/src/file/SDL_rwops.c612
1 files changed, 0 insertions, 612 deletions
diff --git a/distrib/sdl-1.2.12/src/file/SDL_rwops.c b/distrib/sdl-1.2.12/src/file/SDL_rwops.c
deleted file mode 100644
index e463bf1..0000000
--- a/distrib/sdl-1.2.12/src/file/SDL_rwops.c
+++ /dev/null
@@ -1,612 +0,0 @@
-/*
- SDL - Simple DirectMedia Layer
- Copyright (C) 1997-2006 Sam Lantinga
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with this library; if not, write to the Free Software
- Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-
- Sam Lantinga
- slouken@libsdl.org
-*/
-#include "SDL_config.h"
-
-/* This file provides a general interface for SDL to read and write
- data sources. It can easily be extended to files, memory, etc.
-*/
-
-#include "SDL_endian.h"
-#include "SDL_rwops.h"
-
-
-#if defined(__WIN32__) && !defined(__SYMBIAN32__)
-
-/* Functions to read/write Win32 API file pointers */
-/* Will not use it on WinCE because stdio is buffered, it means
- faster, and all stdio functions anyway are embedded in coredll.dll -
- the main wince dll*/
-
-#define WINDOWS_LEAN_AND_MEAN
-#include <windows.h>
-
-#ifndef INVALID_SET_FILE_POINTER
-#define INVALID_SET_FILE_POINTER 0xFFFFFFFF
-#endif
-
-#define READAHEAD_BUFFER_SIZE 1024
-
-static int SDLCALL win32_file_open(SDL_RWops *context, const char *filename, const char *mode)
-{
-#ifndef _WIN32_WCE
- UINT old_error_mode;
-#endif
- HANDLE h;
- DWORD r_right, w_right;
- DWORD must_exist, truncate;
- int a_mode;
-
- if (!context)
- return -1; /* failed (invalid call) */
-
- context->hidden.win32io.h = INVALID_HANDLE_VALUE; /* mark this as unusable */
- context->hidden.win32io.buffer.data = NULL;
- context->hidden.win32io.buffer.size = 0;
- context->hidden.win32io.buffer.left = 0;
-
- /* "r" = reading, file must exist */
- /* "w" = writing, truncate existing, file may not exist */
- /* "r+"= reading or writing, file must exist */
- /* "a" = writing, append file may not exist */
- /* "a+"= append + read, file may not exist */
- /* "w+" = read, write, truncate. file may not exist */
-
- must_exist = ( SDL_strchr(mode,'r') != NULL ) ? OPEN_EXISTING : 0;
- truncate = ( SDL_strchr(mode,'w') != NULL ) ? CREATE_ALWAYS : 0;
- r_right = ( SDL_strchr(mode,'+') != NULL || must_exist ) ? GENERIC_READ : 0;
- a_mode = ( SDL_strchr(mode,'a') != NULL ) ? OPEN_ALWAYS : 0;
- w_right = ( a_mode || SDL_strchr(mode,'+') || truncate ) ? GENERIC_WRITE : 0;
-
- if (!r_right && !w_right) /* inconsistent mode */
- return -1; /* failed (invalid call) */
-
- context->hidden.win32io.buffer.data = (char *)SDL_malloc(READAHEAD_BUFFER_SIZE);
- if (!context->hidden.win32io.buffer.data) {
- SDL_OutOfMemory();
- return -1;
- }
-
-#ifdef _WIN32_WCE
- {
- size_t size = SDL_strlen(filename)+1;
- wchar_t *filenameW = SDL_stack_alloc(wchar_t, size);
-
- if ( MultiByteToWideChar(CP_UTF8, 0, filename, -1, filenameW, size) == 0 ) {
- SDL_stack_free(filenameW);
- SDL_free(context->hidden.win32io.buffer.data);
- context->hidden.win32io.buffer.data = NULL;
- SDL_SetError("Unable to convert filename to Unicode");
- return -1;
- }
- h = CreateFile(filenameW, (w_right|r_right), (w_right)? 0 : FILE_SHARE_READ,
- NULL, (must_exist|truncate|a_mode), FILE_ATTRIBUTE_NORMAL,NULL);
- SDL_stack_free(filenameW);
- }
-#else
- /* Do not open a dialog box if failure */
- old_error_mode = SetErrorMode(SEM_NOOPENFILEERRORBOX|SEM_FAILCRITICALERRORS);
-
- h = CreateFile(filename, (w_right|r_right), (w_right)? 0 : FILE_SHARE_READ,
- NULL, (must_exist|truncate|a_mode), FILE_ATTRIBUTE_NORMAL,NULL);
-
- /* restore old behaviour */
- SetErrorMode(old_error_mode);
-#endif /* _WIN32_WCE */
-
- if (h==INVALID_HANDLE_VALUE) {
- SDL_free(context->hidden.win32io.buffer.data);
- context->hidden.win32io.buffer.data = NULL;
- SDL_SetError("Couldn't open %s",filename);
- return -2; /* failed (CreateFile) */
- }
- context->hidden.win32io.h = h;
- context->hidden.win32io.append = a_mode;
-
- return 0; /* ok */
-}
-static int SDLCALL win32_file_seek(SDL_RWops *context, int offset, int whence)
-{
- DWORD win32whence;
- int file_pos;
-
- if (!context || context->hidden.win32io.h == INVALID_HANDLE_VALUE) {
- SDL_SetError("win32_file_seek: invalid context/file not opened");
- return -1;
- }
-
- /* FIXME: We may be able to satisfy the seek within buffered data */
- if (whence == RW_SEEK_CUR && context->hidden.win32io.buffer.left) {
- offset -= context->hidden.win32io.buffer.left;
- }
- context->hidden.win32io.buffer.left = 0;
-
- switch (whence) {
- case RW_SEEK_SET:
- win32whence = FILE_BEGIN; break;
- case RW_SEEK_CUR:
- win32whence = FILE_CURRENT; break;
- case RW_SEEK_END:
- win32whence = FILE_END; break;
- default:
- SDL_SetError("win32_file_seek: Unknown value for 'whence'");
- return -1;
- }
-
- file_pos = SetFilePointer(context->hidden.win32io.h,offset,NULL,win32whence);
-
- if ( file_pos != INVALID_SET_FILE_POINTER )
- return file_pos; /* success */
-
- SDL_Error(SDL_EFSEEK);
- return -1; /* error */
-}
-static int SDLCALL win32_file_read(SDL_RWops *context, void *ptr, int size, int maxnum)
-{
- int total_need;
- int total_read = 0;
- int read_ahead;
- DWORD byte_read;
-
- total_need = size*maxnum;
-
- if (!context || context->hidden.win32io.h == INVALID_HANDLE_VALUE || total_need<=0 || !size)
- return 0;
-
- if (context->hidden.win32io.buffer.left > 0) {
- void *data = (char *)context->hidden.win32io.buffer.data +
- context->hidden.win32io.buffer.size -
- context->hidden.win32io.buffer.left;
- read_ahead = SDL_min(total_need, context->hidden.win32io.buffer.left);
- SDL_memcpy(ptr, data, read_ahead);
- context->hidden.win32io.buffer.left -= read_ahead;
-
- if (read_ahead == total_need) {
- return maxnum;
- }
- ptr = (char *)ptr + read_ahead;
- total_need -= read_ahead;
- total_read += read_ahead;
- }
-
- if (total_need < READAHEAD_BUFFER_SIZE) {
- if (!ReadFile(context->hidden.win32io.h,context->hidden.win32io.buffer.data,READAHEAD_BUFFER_SIZE,&byte_read,NULL)) {
- SDL_Error(SDL_EFREAD);
- return 0;
- }
- read_ahead = SDL_min(total_need, (int)byte_read);
- SDL_memcpy(ptr, context->hidden.win32io.buffer.data, read_ahead);
- context->hidden.win32io.buffer.size = byte_read;
- context->hidden.win32io.buffer.left = byte_read-read_ahead;
- total_read += read_ahead;
- } else {
- if (!ReadFile(context->hidden.win32io.h,ptr,total_need,&byte_read,NULL)) {
- SDL_Error(SDL_EFREAD);
- return 0;
- }
- total_read += byte_read;
- }
- return (total_read/size);
-}
-static int SDLCALL win32_file_write(SDL_RWops *context, const void *ptr, int size, int num)
-{
-
- int total_bytes;
- DWORD byte_written,nwritten;
-
- total_bytes = size*num;
-
- if (!context || context->hidden.win32io.h==INVALID_HANDLE_VALUE || total_bytes<=0 || !size)
- return 0;
-
- if (context->hidden.win32io.buffer.left) {
- SetFilePointer(context->hidden.win32io.h,-context->hidden.win32io.buffer.left,NULL,FILE_CURRENT);
- context->hidden.win32io.buffer.left = 0;
- }
-
- /* if in append mode, we must go to the EOF before write */
- if (context->hidden.win32io.append) {
- if ( SetFilePointer(context->hidden.win32io.h,0L,NULL,FILE_END) == INVALID_SET_FILE_POINTER ) {
- SDL_Error(SDL_EFWRITE);
- return 0;
- }
- }
-
- if (!WriteFile(context->hidden.win32io.h,ptr,total_bytes,&byte_written,NULL)) {
- SDL_Error(SDL_EFWRITE);
- return 0;
- }
-
- nwritten = byte_written/size;
- return nwritten;
-}
-static int SDLCALL win32_file_close(SDL_RWops *context)
-{
-
- if ( context ) {
- if (context->hidden.win32io.h != INVALID_HANDLE_VALUE) {
- CloseHandle(context->hidden.win32io.h);
- context->hidden.win32io.h = INVALID_HANDLE_VALUE; /* to be sure */
- }
- if (context->hidden.win32io.buffer.data) {
- SDL_free(context->hidden.win32io.buffer.data);
- context->hidden.win32io.buffer.data = NULL;
- }
- SDL_FreeRW(context);
- }
- return(0);
-}
-#endif /* __WIN32__ */
-
-#ifdef HAVE_STDIO_H
-
-/* Functions to read/write stdio file pointers */
-
-static int SDLCALL stdio_seek(SDL_RWops *context, int offset, int whence)
-{
- if ( fseek(context->hidden.stdio.fp, offset, whence) == 0 ) {
- return(ftell(context->hidden.stdio.fp));
- } else {
- SDL_Error(SDL_EFSEEK);
- return(-1);
- }
-}
-static int SDLCALL stdio_read(SDL_RWops *context, void *ptr, int size, int maxnum)
-{
- size_t nread;
-
- nread = fread(ptr, size, maxnum, context->hidden.stdio.fp);
- if ( nread == 0 && ferror(context->hidden.stdio.fp) ) {
- SDL_Error(SDL_EFREAD);
- }
- return(nread);
-}
-static int SDLCALL stdio_write(SDL_RWops *context, const void *ptr, int size, int num)
-{
- size_t nwrote;
-
- nwrote = fwrite(ptr, size, num, context->hidden.stdio.fp);
- if ( nwrote == 0 && ferror(context->hidden.stdio.fp) ) {
- SDL_Error(SDL_EFWRITE);
- }
- return(nwrote);
-}
-static int SDLCALL stdio_close(SDL_RWops *context)
-{
- if ( context ) {
- if ( context->hidden.stdio.autoclose ) {
- /* WARNING: Check the return value here! */
- fclose(context->hidden.stdio.fp);
- }
- SDL_FreeRW(context);
- }
- return(0);
-}
-#endif /* !HAVE_STDIO_H */
-
-/* Functions to read/write memory pointers */
-
-static int SDLCALL mem_seek(SDL_RWops *context, int offset, int whence)
-{
- Uint8 *newpos;
-
- switch (whence) {
- case RW_SEEK_SET:
- newpos = context->hidden.mem.base+offset;
- break;
- case RW_SEEK_CUR:
- newpos = context->hidden.mem.here+offset;
- break;
- case RW_SEEK_END:
- newpos = context->hidden.mem.stop+offset;
- break;
- default:
- SDL_SetError("Unknown value for 'whence'");
- return(-1);
- }
- if ( newpos < context->hidden.mem.base ) {
- newpos = context->hidden.mem.base;
- }
- if ( newpos > context->hidden.mem.stop ) {
- newpos = context->hidden.mem.stop;
- }
- context->hidden.mem.here = newpos;
- return(context->hidden.mem.here-context->hidden.mem.base);
-}
-static int SDLCALL mem_read(SDL_RWops *context, void *ptr, int size, int maxnum)
-{
- size_t total_bytes;
- size_t mem_available;
-
- total_bytes = (maxnum * size);
- if ( (maxnum <= 0) || (size <= 0) || ((total_bytes / maxnum) != (size_t) size) ) {
- return 0;
- }
-
- mem_available = (context->hidden.mem.stop - context->hidden.mem.here);
- if (total_bytes > mem_available) {
- total_bytes = mem_available;
- }
-
- SDL_memcpy(ptr, context->hidden.mem.here, total_bytes);
- context->hidden.mem.here += total_bytes;
-
- return (total_bytes / size);
-}
-static int SDLCALL mem_write(SDL_RWops *context, const void *ptr, int size, int num)
-{
- if ( (context->hidden.mem.here + (num*size)) > context->hidden.mem.stop ) {
- num = (context->hidden.mem.stop-context->hidden.mem.here)/size;
- }
- SDL_memcpy(context->hidden.mem.here, ptr, num*size);
- context->hidden.mem.here += num*size;
- return(num);
-}
-static int SDLCALL mem_writeconst(SDL_RWops *context, const void *ptr, int size, int num)
-{
- SDL_SetError("Can't write to read-only memory");
- return(-1);
-}
-static int SDLCALL mem_close(SDL_RWops *context)
-{
- if ( context ) {
- SDL_FreeRW(context);
- }
- return(0);
-}
-
-
-/* Functions to create SDL_RWops structures from various data sources */
-
-#ifdef __MACOS__
-/*
- * translate unix-style slash-separated filename to mac-style colon-separated
- * name; return malloced string
- */
-static char *unix_to_mac(const char *file)
-{
- int flen = SDL_strlen(file);
- char *path = SDL_malloc(flen + 2);
- const char *src = file;
- char *dst = path;
- if(*src == '/') {
- /* really depends on filesystem layout, hope for the best */
- src++;
- } else {
- /* Check if this is a MacOS path to begin with */
- if(*src != ':')
- *dst++ = ':'; /* relative paths begin with ':' */
- }
- while(src < file + flen) {
- const char *end = SDL_strchr(src, '/');
- int len;
- if(!end)
- end = file + flen; /* last component */
- len = end - src;
- if(len == 0 || (len == 1 && src[0] == '.')) {
- /* remove repeated slashes and . */
- } else {
- if(len == 2 && src[0] == '.' && src[1] == '.') {
- /* replace .. with the empty string */
- } else {
- SDL_memcpy(dst, src, len);
- dst += len;
- }
- if(end < file + flen)
- *dst++ = ':';
- }
- src = end + 1;
- }
- *dst++ = '\0';
- return path;
-}
-#endif /* __MACOS__ */
-
-SDL_RWops *SDL_RWFromFile(const char *file, const char *mode)
-{
- SDL_RWops *rwops = NULL;
-#ifdef HAVE_STDIO_H
- FILE *fp = NULL;
-#endif
- if ( !file || !*file || !mode || !*mode ) {
- SDL_SetError("SDL_RWFromFile(): No file or no mode specified");
- return NULL;
- }
-
-#if defined(__WIN32__) && !defined(__SYMBIAN32__)
- rwops = SDL_AllocRW();
- if (!rwops)
- return NULL; /* SDL_SetError already setup by SDL_AllocRW() */
- if (win32_file_open(rwops,file,mode) < 0) {
- SDL_FreeRW(rwops);
- return NULL;
- }
- rwops->seek = win32_file_seek;
- rwops->read = win32_file_read;
- rwops->write = win32_file_write;
- rwops->close = win32_file_close;
-
-#elif HAVE_STDIO_H
-
-#ifdef __MACOS__
- {
- char *mpath = unix_to_mac(file);
- fp = fopen(mpath, mode);
- SDL_free(mpath);
- }
-#else
- fp = fopen(file, mode);
-#endif
- if ( fp == NULL ) {
- SDL_SetError("Couldn't open %s", file);
- } else {
- rwops = SDL_RWFromFP(fp, 1);
- }
-#else
- SDL_SetError("SDL not compiled with stdio support");
-#endif /* !HAVE_STDIO_H */
-
- return(rwops);
-}
-
-#ifdef HAVE_STDIO_H
-SDL_RWops *SDL_RWFromFP(FILE *fp, int autoclose)
-{
- SDL_RWops *rwops = NULL;
-
- rwops = SDL_AllocRW();
- if ( rwops != NULL ) {
- rwops->seek = stdio_seek;
- rwops->read = stdio_read;
- rwops->write = stdio_write;
- rwops->close = stdio_close;
- rwops->hidden.stdio.fp = fp;
- rwops->hidden.stdio.autoclose = autoclose;
- }
- return(rwops);
-}
-#endif /* HAVE_STDIO_H */
-
-SDL_RWops *SDL_RWFromMem(void *mem, int size)
-{
- SDL_RWops *rwops;
-
- rwops = SDL_AllocRW();
- if ( rwops != NULL ) {
- rwops->seek = mem_seek;
- rwops->read = mem_read;
- rwops->write = mem_write;
- rwops->close = mem_close;
- rwops->hidden.mem.base = (Uint8 *)mem;
- rwops->hidden.mem.here = rwops->hidden.mem.base;
- rwops->hidden.mem.stop = rwops->hidden.mem.base+size;
- }
- return(rwops);
-}
-
-SDL_RWops *SDL_RWFromConstMem(const void *mem, int size)
-{
- SDL_RWops *rwops;
-
- rwops = SDL_AllocRW();
- if ( rwops != NULL ) {
- rwops->seek = mem_seek;
- rwops->read = mem_read;
- rwops->write = mem_writeconst;
- rwops->close = mem_close;
- rwops->hidden.mem.base = (Uint8 *)mem;
- rwops->hidden.mem.here = rwops->hidden.mem.base;
- rwops->hidden.mem.stop = rwops->hidden.mem.base+size;
- }
- return(rwops);
-}
-
-SDL_RWops *SDL_AllocRW(void)
-{
- SDL_RWops *area;
-
- area = (SDL_RWops *)SDL_malloc(sizeof *area);
- if ( area == NULL ) {
- SDL_OutOfMemory();
- }
- return(area);
-}
-
-void SDL_FreeRW(SDL_RWops *area)
-{
- SDL_free(area);
-}
-
-/* Functions for dynamically reading and writing endian-specific values */
-
-Uint16 SDL_ReadLE16 (SDL_RWops *src)
-{
- Uint16 value;
-
- SDL_RWread(src, &value, (sizeof value), 1);
- return(SDL_SwapLE16(value));
-}
-Uint16 SDL_ReadBE16 (SDL_RWops *src)
-{
- Uint16 value;
-
- SDL_RWread(src, &value, (sizeof value), 1);
- return(SDL_SwapBE16(value));
-}
-Uint32 SDL_ReadLE32 (SDL_RWops *src)
-{
- Uint32 value;
-
- SDL_RWread(src, &value, (sizeof value), 1);
- return(SDL_SwapLE32(value));
-}
-Uint32 SDL_ReadBE32 (SDL_RWops *src)
-{
- Uint32 value;
-
- SDL_RWread(src, &value, (sizeof value), 1);
- return(SDL_SwapBE32(value));
-}
-Uint64 SDL_ReadLE64 (SDL_RWops *src)
-{
- Uint64 value;
-
- SDL_RWread(src, &value, (sizeof value), 1);
- return(SDL_SwapLE64(value));
-}
-Uint64 SDL_ReadBE64 (SDL_RWops *src)
-{
- Uint64 value;
-
- SDL_RWread(src, &value, (sizeof value), 1);
- return(SDL_SwapBE64(value));
-}
-
-int SDL_WriteLE16 (SDL_RWops *dst, Uint16 value)
-{
- value = SDL_SwapLE16(value);
- return(SDL_RWwrite(dst, &value, (sizeof value), 1));
-}
-int SDL_WriteBE16 (SDL_RWops *dst, Uint16 value)
-{
- value = SDL_SwapBE16(value);
- return(SDL_RWwrite(dst, &value, (sizeof value), 1));
-}
-int SDL_WriteLE32 (SDL_RWops *dst, Uint32 value)
-{
- value = SDL_SwapLE32(value);
- return(SDL_RWwrite(dst, &value, (sizeof value), 1));
-}
-int SDL_WriteBE32 (SDL_RWops *dst, Uint32 value)
-{
- value = SDL_SwapBE32(value);
- return(SDL_RWwrite(dst, &value, (sizeof value), 1));
-}
-int SDL_WriteLE64 (SDL_RWops *dst, Uint64 value)
-{
- value = SDL_SwapLE64(value);
- return(SDL_RWwrite(dst, &value, (sizeof value), 1));
-}
-int SDL_WriteBE64 (SDL_RWops *dst, Uint64 value)
-{
- value = SDL_SwapBE64(value);
- return(SDL_RWwrite(dst, &value, (sizeof value), 1));
-}
generated by cgit v1.1 at 2024-04-28 12:06:11 +0000