slouken@8582
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/*
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slouken@8582
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Simple DirectMedia Layer
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slouken@8149
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Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
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slouken@8582
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slouken@8582
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This software is provided 'as-is', without any express or implied
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slouken@8582
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warranty. In no event will the authors be held liable for any damages
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slouken@8582
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arising from the use of this software.
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slouken@8582
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slouken@8582
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Permission is granted to anyone to use this software for any purpose,
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slouken@8582
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including commercial applications, and to alter it and redistribute it
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slouken@8582
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freely, subject to the following restrictions:
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slouken@8582
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slouken@8582
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1. The origin of this software must not be misrepresented; you must not
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slouken@8582
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claim that you wrote the original software. If you use this software
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slouken@8582
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in a product, an acknowledgment in the product documentation would be
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slouken@8582
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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slouken@8582
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*/
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slouken@8582
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/* Need this so Linux systems define fseek64o, ftell64o and off64_t */
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slouken@8582
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#define _LARGEFILE64_SOURCE
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icculus@8093
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#include "../SDL_internal.h"
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slouken@8582
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slouken@8582
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#if defined(__WIN32__)
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#include "../core/windows/SDL_windows.h"
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#endif
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/* This file provides a general interface for SDL to read and write
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data sources. It can easily be extended to files, memory, etc.
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*/
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slouken@8582
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slouken@8582
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#include "SDL_endian.h"
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slouken@8582
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#include "SDL_rwops.h"
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slouken@8582
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#ifdef __APPLE__
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#include "cocoa/SDL_rwopsbundlesupport.h"
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#endif /* __APPLE__ */
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dimitris@8761
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#ifdef __ANDROID__
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#include "../core/android/SDL_android.h"
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#include "SDL_system.h"
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slouken@8582
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#endif
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#ifdef __WIN32__
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slouken@8582
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/* Functions to read/write Win32 API file pointers */
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slouken@8582
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#ifndef INVALID_SET_FILE_POINTER
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#define INVALID_SET_FILE_POINTER 0xFFFFFFFF
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#endif
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#define READAHEAD_BUFFER_SIZE 1024
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static int SDLCALL
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windows_file_open(SDL_RWops * context, const char *filename, const char *mode)
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{
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UINT old_error_mode;
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HANDLE h;
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DWORD r_right, w_right;
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DWORD must_exist, truncate;
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slouken@8582
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int a_mode;
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slouken@8582
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slouken@8582
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if (!context)
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return -1; /* failed (invalid call) */
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slouken@8582
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slouken@8582
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context->hidden.windowsio.h = INVALID_HANDLE_VALUE; /* mark this as unusable */
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slouken@8582
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context->hidden.windowsio.buffer.data = NULL;
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context->hidden.windowsio.buffer.size = 0;
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context->hidden.windowsio.buffer.left = 0;
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/* "r" = reading, file must exist */
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/* "w" = writing, truncate existing, file may not exist */
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/* "r+"= reading or writing, file must exist */
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/* "a" = writing, append file may not exist */
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/* "a+"= append + read, file may not exist */
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/* "w+" = read, write, truncate. file may not exist */
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must_exist = (SDL_strchr(mode, 'r') != NULL) ? OPEN_EXISTING : 0;
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truncate = (SDL_strchr(mode, 'w') != NULL) ? CREATE_ALWAYS : 0;
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r_right = (SDL_strchr(mode, '+') != NULL
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|| must_exist) ? GENERIC_READ : 0;
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a_mode = (SDL_strchr(mode, 'a') != NULL) ? OPEN_ALWAYS : 0;
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w_right = (a_mode || SDL_strchr(mode, '+')
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|| truncate) ? GENERIC_WRITE : 0;
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slouken@8582
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if (!r_right && !w_right) /* inconsistent mode */
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return -1; /* failed (invalid call) */
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slouken@8582
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slouken@8582
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context->hidden.windowsio.buffer.data =
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slouken@8582
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(char *) SDL_malloc(READAHEAD_BUFFER_SIZE);
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if (!context->hidden.windowsio.buffer.data) {
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return SDL_OutOfMemory();
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}
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/* Do not open a dialog box if failure */
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old_error_mode =
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SetErrorMode(SEM_NOOPENFILEERRORBOX | SEM_FAILCRITICALERRORS);
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slouken@8582
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{
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LPTSTR tstr = WIN_UTF8ToString(filename);
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h = CreateFile(tstr, (w_right | r_right),
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(w_right) ? 0 : FILE_SHARE_READ, NULL,
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(must_exist | truncate | a_mode),
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FILE_ATTRIBUTE_NORMAL, NULL);
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SDL_free(tstr);
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}
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/* restore old behavior */
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SetErrorMode(old_error_mode);
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if (h == INVALID_HANDLE_VALUE) {
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SDL_free(context->hidden.windowsio.buffer.data);
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context->hidden.windowsio.buffer.data = NULL;
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SDL_SetError("Couldn't open %s", filename);
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return -2; /* failed (CreateFile) */
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slouken@8582
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}
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context->hidden.windowsio.h = h;
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slouken@8582
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context->hidden.windowsio.append = a_mode ? SDL_TRUE : SDL_FALSE;
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slouken@8582
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slouken@8582
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return 0; /* ok */
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}
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slouken@8582
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slouken@8582
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static Sint64 SDLCALL
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slouken@8582
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windows_file_size(SDL_RWops * context)
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slouken@8582
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{
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slouken@8582
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LARGE_INTEGER size;
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slouken@8582
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if (!context || context->hidden.windowsio.h == INVALID_HANDLE_VALUE) {
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slouken@8582
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return SDL_SetError("windows_file_size: invalid context/file not opened");
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slouken@8582
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}
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slouken@8582
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slouken@8582
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if (!GetFileSizeEx(context->hidden.windowsio.h, &size)) {
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slouken@8582
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return WIN_SetError("windows_file_size");
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}
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slouken@8582
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slouken@8582
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return size.QuadPart;
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slouken@8582
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}
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slouken@8582
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static Sint64 SDLCALL
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slouken@8582
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windows_file_seek(SDL_RWops * context, Sint64 offset, int whence)
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{
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slouken@8582
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DWORD windowswhence;
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slouken@8582
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LARGE_INTEGER windowsoffset;
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slouken@8582
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slouken@8582
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if (!context || context->hidden.windowsio.h == INVALID_HANDLE_VALUE) {
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slouken@8582
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return SDL_SetError("windows_file_seek: invalid context/file not opened");
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slouken@8582
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}
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slouken@8582
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slouken@8582
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/* FIXME: We may be able to satisfy the seek within buffered data */
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slouken@8582
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if (whence == RW_SEEK_CUR && context->hidden.windowsio.buffer.left) {
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slouken@8582
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offset -= (long)context->hidden.windowsio.buffer.left;
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slouken@8582
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}
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slouken@8582
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context->hidden.windowsio.buffer.left = 0;
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slouken@8582
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slouken@8582
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switch (whence) {
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slouken@8582
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case RW_SEEK_SET:
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slouken@8582
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windowswhence = FILE_BEGIN;
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slouken@8582
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break;
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slouken@8582
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case RW_SEEK_CUR:
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slouken@8582
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windowswhence = FILE_CURRENT;
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slouken@8582
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break;
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slouken@8582
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case RW_SEEK_END:
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slouken@8582
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windowswhence = FILE_END;
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slouken@8582
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break;
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slouken@8582
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default:
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slouken@8582
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return SDL_SetError("windows_file_seek: Unknown value for 'whence'");
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slouken@8582
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}
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slouken@8582
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slouken@8582
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windowsoffset.QuadPart = offset;
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slouken@8582
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if (!SetFilePointerEx(context->hidden.windowsio.h, windowsoffset, &windowsoffset, windowswhence)) {
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slouken@8582
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return WIN_SetError("windows_file_seek");
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slouken@8582
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}
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slouken@8582
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return windowsoffset.QuadPart;
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slouken@8582
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}
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slouken@8582
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slouken@8582
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static size_t SDLCALL
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windows_file_read(SDL_RWops * context, void *ptr, size_t size, size_t maxnum)
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slouken@8582
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{
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slouken@8582
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size_t total_need;
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slouken@8582
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size_t total_read = 0;
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slouken@8582
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size_t read_ahead;
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slouken@8582
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DWORD byte_read;
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slouken@8582
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slouken@8582
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total_need = size * maxnum;
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slouken@8582
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slouken@8582
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if (!context || context->hidden.windowsio.h == INVALID_HANDLE_VALUE
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slouken@8582
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|| !total_need)
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slouken@8582
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return 0;
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slouken@8582
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slouken@8582
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if (context->hidden.windowsio.buffer.left > 0) {
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slouken@8582
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192 |
void *data = (char *) context->hidden.windowsio.buffer.data +
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slouken@8582
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context->hidden.windowsio.buffer.size -
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slouken@8582
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context->hidden.windowsio.buffer.left;
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slouken@8582
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read_ahead =
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slouken@8582
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SDL_min(total_need, context->hidden.windowsio.buffer.left);
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slouken@8582
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SDL_memcpy(ptr, data, read_ahead);
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slouken@8582
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context->hidden.windowsio.buffer.left -= read_ahead;
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slouken@8582
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slouken@8582
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if (read_ahead == total_need) {
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slouken@8582
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return maxnum;
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slouken@8582
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}
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slouken@8582
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ptr = (char *) ptr + read_ahead;
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slouken@8582
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total_need -= read_ahead;
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slouken@8582
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total_read += read_ahead;
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slouken@8582
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206 |
}
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slouken@8582
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207 |
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slouken@8582
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if (total_need < READAHEAD_BUFFER_SIZE) {
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slouken@8582
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209 |
if (!ReadFile
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slouken@8582
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(context->hidden.windowsio.h, context->hidden.windowsio.buffer.data,
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slouken@8582
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READAHEAD_BUFFER_SIZE, &byte_read, NULL)) {
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slouken@8582
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212 |
SDL_Error(SDL_EFREAD);
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slouken@8582
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213 |
return 0;
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slouken@8582
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214 |
}
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slouken@8582
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215 |
read_ahead = SDL_min(total_need, (int) byte_read);
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slouken@8582
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216 |
SDL_memcpy(ptr, context->hidden.windowsio.buffer.data, read_ahead);
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slouken@8582
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217 |
context->hidden.windowsio.buffer.size = byte_read;
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slouken@8582
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218 |
context->hidden.windowsio.buffer.left = byte_read - read_ahead;
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slouken@8582
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219 |
total_read += read_ahead;
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slouken@8582
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220 |
} else {
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slouken@8582
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221 |
if (!ReadFile
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slouken@8582
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222 |
(context->hidden.windowsio.h, ptr, (DWORD)total_need, &byte_read, NULL)) {
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slouken@8582
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223 |
SDL_Error(SDL_EFREAD);
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slouken@8582
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224 |
return 0;
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slouken@8582
|
225 |
}
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slouken@8582
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226 |
total_read += byte_read;
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slouken@8582
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227 |
}
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slouken@8582
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228 |
return (total_read / size);
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slouken@8582
|
229 |
}
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slouken@8582
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230 |
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slouken@8582
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231 |
static size_t SDLCALL
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slouken@8582
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232 |
windows_file_write(SDL_RWops * context, const void *ptr, size_t size,
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slouken@8582
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233 |
size_t num)
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slouken@8582
|
234 |
{
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slouken@8582
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235 |
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slouken@8582
|
236 |
size_t total_bytes;
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slouken@8582
|
237 |
DWORD byte_written;
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slouken@8582
|
238 |
size_t nwritten;
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slouken@8582
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239 |
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slouken@8582
|
240 |
total_bytes = size * num;
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slouken@8582
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241 |
|
slouken@8582
|
242 |
if (!context || context->hidden.windowsio.h == INVALID_HANDLE_VALUE
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slouken@8582
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243 |
|| total_bytes <= 0 || !size)
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slouken@8582
|
244 |
return 0;
|
slouken@8582
|
245 |
|
slouken@8582
|
246 |
if (context->hidden.windowsio.buffer.left) {
|
slouken@8582
|
247 |
SetFilePointer(context->hidden.windowsio.h,
|
slouken@8582
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248 |
-(LONG)context->hidden.windowsio.buffer.left, NULL,
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slouken@8582
|
249 |
FILE_CURRENT);
|
slouken@8582
|
250 |
context->hidden.windowsio.buffer.left = 0;
|
slouken@8582
|
251 |
}
|
slouken@8582
|
252 |
|
slouken@8582
|
253 |
/* if in append mode, we must go to the EOF before write */
|
slouken@8582
|
254 |
if (context->hidden.windowsio.append) {
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slouken@8582
|
255 |
if (SetFilePointer(context->hidden.windowsio.h, 0L, NULL, FILE_END) ==
|
slouken@8582
|
256 |
INVALID_SET_FILE_POINTER) {
|
slouken@8582
|
257 |
SDL_Error(SDL_EFWRITE);
|
slouken@8582
|
258 |
return 0;
|
slouken@8582
|
259 |
}
|
slouken@8582
|
260 |
}
|
slouken@8582
|
261 |
|
slouken@8582
|
262 |
if (!WriteFile
|
slouken@8582
|
263 |
(context->hidden.windowsio.h, ptr, (DWORD)total_bytes, &byte_written, NULL)) {
|
slouken@8582
|
264 |
SDL_Error(SDL_EFWRITE);
|
slouken@8582
|
265 |
return 0;
|
slouken@8582
|
266 |
}
|
slouken@8582
|
267 |
|
slouken@8582
|
268 |
nwritten = byte_written / size;
|
slouken@8582
|
269 |
return nwritten;
|
slouken@8582
|
270 |
}
|
slouken@8582
|
271 |
|
slouken@8582
|
272 |
static int SDLCALL
|
slouken@8582
|
273 |
windows_file_close(SDL_RWops * context)
|
slouken@8582
|
274 |
{
|
slouken@8582
|
275 |
|
slouken@8582
|
276 |
if (context) {
|
slouken@8582
|
277 |
if (context->hidden.windowsio.h != INVALID_HANDLE_VALUE) {
|
slouken@8582
|
278 |
CloseHandle(context->hidden.windowsio.h);
|
slouken@8582
|
279 |
context->hidden.windowsio.h = INVALID_HANDLE_VALUE; /* to be sure */
|
slouken@8582
|
280 |
}
|
slouken@8582
|
281 |
SDL_free(context->hidden.windowsio.buffer.data);
|
slouken@8582
|
282 |
context->hidden.windowsio.buffer.data = NULL;
|
slouken@8582
|
283 |
SDL_FreeRW(context);
|
slouken@8582
|
284 |
}
|
icculus@8162
|
285 |
return 0;
|
slouken@8582
|
286 |
}
|
slouken@8582
|
287 |
#endif /* __WIN32__ */
|
slouken@8582
|
288 |
|
slouken@8582
|
289 |
#ifdef HAVE_STDIO_H
|
slouken@8582
|
290 |
|
slouken@8582
|
291 |
/* Functions to read/write stdio file pointers */
|
slouken@8582
|
292 |
|
slouken@8582
|
293 |
static Sint64 SDLCALL
|
slouken@8582
|
294 |
stdio_size(SDL_RWops * context)
|
slouken@8582
|
295 |
{
|
slouken@8582
|
296 |
Sint64 pos, size;
|
slouken@8582
|
297 |
|
slouken@8582
|
298 |
pos = SDL_RWseek(context, 0, RW_SEEK_CUR);
|
slouken@8582
|
299 |
if (pos < 0) {
|
slouken@8582
|
300 |
return -1;
|
slouken@8582
|
301 |
}
|
slouken@8582
|
302 |
size = SDL_RWseek(context, 0, RW_SEEK_END);
|
slouken@8582
|
303 |
|
slouken@8582
|
304 |
SDL_RWseek(context, pos, RW_SEEK_SET);
|
slouken@8582
|
305 |
return size;
|
slouken@8582
|
306 |
}
|
slouken@8582
|
307 |
|
slouken@8582
|
308 |
static Sint64 SDLCALL
|
slouken@8582
|
309 |
stdio_seek(SDL_RWops * context, Sint64 offset, int whence)
|
slouken@8582
|
310 |
{
|
slouken@8582
|
311 |
#ifdef HAVE_FSEEKO64
|
slouken@8582
|
312 |
if (fseeko64(context->hidden.stdio.fp, (off64_t)offset, whence) == 0) {
|
slouken@8582
|
313 |
return ftello64(context->hidden.stdio.fp);
|
slouken@8582
|
314 |
}
|
slouken@8582
|
315 |
#elif defined(HAVE_FSEEKO)
|
slouken@8582
|
316 |
if (fseeko(context->hidden.stdio.fp, (off_t)offset, whence) == 0) {
|
slouken@8582
|
317 |
return ftello(context->hidden.stdio.fp);
|
slouken@8582
|
318 |
}
|
slouken@8582
|
319 |
#elif defined(HAVE__FSEEKI64)
|
slouken@8582
|
320 |
if (_fseeki64(context->hidden.stdio.fp, offset, whence) == 0) {
|
slouken@8582
|
321 |
return _ftelli64(context->hidden.stdio.fp);
|
slouken@8582
|
322 |
}
|
slouken@8582
|
323 |
#else
|
slouken@8582
|
324 |
if (fseek(context->hidden.stdio.fp, offset, whence) == 0) {
|
icculus@8162
|
325 |
return ftell(context->hidden.stdio.fp);
|
slouken@8582
|
326 |
}
|
slouken@8582
|
327 |
#endif
|
slouken@8582
|
328 |
return SDL_Error(SDL_EFSEEK);
|
slouken@8582
|
329 |
}
|
slouken@8582
|
330 |
|
slouken@8582
|
331 |
static size_t SDLCALL
|
slouken@8582
|
332 |
stdio_read(SDL_RWops * context, void *ptr, size_t size, size_t maxnum)
|
slouken@8582
|
333 |
{
|
slouken@8582
|
334 |
size_t nread;
|
slouken@8582
|
335 |
|
slouken@8582
|
336 |
nread = fread(ptr, size, maxnum, context->hidden.stdio.fp);
|
slouken@8582
|
337 |
if (nread == 0 && ferror(context->hidden.stdio.fp)) {
|
slouken@8582
|
338 |
SDL_Error(SDL_EFREAD);
|
slouken@8582
|
339 |
}
|
icculus@8162
|
340 |
return nread;
|
slouken@8582
|
341 |
}
|
slouken@8582
|
342 |
|
slouken@8582
|
343 |
static size_t SDLCALL
|
slouken@8582
|
344 |
stdio_write(SDL_RWops * context, const void *ptr, size_t size, size_t num)
|
slouken@8582
|
345 |
{
|
slouken@8582
|
346 |
size_t nwrote;
|
slouken@8582
|
347 |
|
slouken@8582
|
348 |
nwrote = fwrite(ptr, size, num, context->hidden.stdio.fp);
|
slouken@8582
|
349 |
if (nwrote == 0 && ferror(context->hidden.stdio.fp)) {
|
slouken@8582
|
350 |
SDL_Error(SDL_EFWRITE);
|
slouken@8582
|
351 |
}
|
icculus@8162
|
352 |
return nwrote;
|
slouken@8582
|
353 |
}
|
slouken@8582
|
354 |
|
slouken@8582
|
355 |
static int SDLCALL
|
slouken@8582
|
356 |
stdio_close(SDL_RWops * context)
|
slouken@8582
|
357 |
{
|
slouken@8582
|
358 |
int status = 0;
|
slouken@8582
|
359 |
if (context) {
|
slouken@8582
|
360 |
if (context->hidden.stdio.autoclose) {
|
slouken@8582
|
361 |
/* WARNING: Check the return value here! */
|
slouken@8582
|
362 |
if (fclose(context->hidden.stdio.fp) != 0) {
|
slouken@8582
|
363 |
status = SDL_Error(SDL_EFWRITE);
|
slouken@8582
|
364 |
}
|
slouken@8582
|
365 |
}
|
slouken@8582
|
366 |
SDL_FreeRW(context);
|
slouken@8582
|
367 |
}
|
slouken@8582
|
368 |
return status;
|
slouken@8582
|
369 |
}
|
slouken@8582
|
370 |
#endif /* !HAVE_STDIO_H */
|
slouken@8582
|
371 |
|
slouken@8582
|
372 |
/* Functions to read/write memory pointers */
|
slouken@8582
|
373 |
|
slouken@8582
|
374 |
static Sint64 SDLCALL
|
slouken@8582
|
375 |
mem_size(SDL_RWops * context)
|
slouken@8582
|
376 |
{
|
slouken@8582
|
377 |
return (Sint64)(context->hidden.mem.stop - context->hidden.mem.base);
|
slouken@8582
|
378 |
}
|
slouken@8582
|
379 |
|
slouken@8582
|
380 |
static Sint64 SDLCALL
|
slouken@8582
|
381 |
mem_seek(SDL_RWops * context, Sint64 offset, int whence)
|
slouken@8582
|
382 |
{
|
slouken@8582
|
383 |
Uint8 *newpos;
|
slouken@8582
|
384 |
|
slouken@8582
|
385 |
switch (whence) {
|
slouken@8582
|
386 |
case RW_SEEK_SET:
|
slouken@8582
|
387 |
newpos = context->hidden.mem.base + offset;
|
slouken@8582
|
388 |
break;
|
slouken@8582
|
389 |
case RW_SEEK_CUR:
|
slouken@8582
|
390 |
newpos = context->hidden.mem.here + offset;
|
slouken@8582
|
391 |
break;
|
slouken@8582
|
392 |
case RW_SEEK_END:
|
slouken@8582
|
393 |
newpos = context->hidden.mem.stop + offset;
|
slouken@8582
|
394 |
break;
|
slouken@8582
|
395 |
default:
|
slouken@8582
|
396 |
return SDL_SetError("Unknown value for 'whence'");
|
slouken@8582
|
397 |
}
|
slouken@8582
|
398 |
if (newpos < context->hidden.mem.base) {
|
slouken@8582
|
399 |
newpos = context->hidden.mem.base;
|
slouken@8582
|
400 |
}
|
slouken@8582
|
401 |
if (newpos > context->hidden.mem.stop) {
|
slouken@8582
|
402 |
newpos = context->hidden.mem.stop;
|
slouken@8582
|
403 |
}
|
slouken@8582
|
404 |
context->hidden.mem.here = newpos;
|
slouken@8582
|
405 |
return (Sint64)(context->hidden.mem.here - context->hidden.mem.base);
|
slouken@8582
|
406 |
}
|
slouken@8582
|
407 |
|
slouken@8582
|
408 |
static size_t SDLCALL
|
slouken@8582
|
409 |
mem_read(SDL_RWops * context, void *ptr, size_t size, size_t maxnum)
|
slouken@8582
|
410 |
{
|
slouken@8582
|
411 |
size_t total_bytes;
|
slouken@8582
|
412 |
size_t mem_available;
|
slouken@8582
|
413 |
|
slouken@8582
|
414 |
total_bytes = (maxnum * size);
|
slouken@8582
|
415 |
if ((maxnum <= 0) || (size <= 0)
|
slouken@8582
|
416 |
|| ((total_bytes / maxnum) != (size_t) size)) {
|
slouken@8582
|
417 |
return 0;
|
slouken@8582
|
418 |
}
|
slouken@8582
|
419 |
|
slouken@8582
|
420 |
mem_available = (context->hidden.mem.stop - context->hidden.mem.here);
|
slouken@8582
|
421 |
if (total_bytes > mem_available) {
|
slouken@8582
|
422 |
total_bytes = mem_available;
|
slouken@8582
|
423 |
}
|
slouken@8582
|
424 |
|
slouken@8582
|
425 |
SDL_memcpy(ptr, context->hidden.mem.here, total_bytes);
|
slouken@8582
|
426 |
context->hidden.mem.here += total_bytes;
|
slouken@8582
|
427 |
|
slouken@8582
|
428 |
return (total_bytes / size);
|
slouken@8582
|
429 |
}
|
slouken@8582
|
430 |
|
slouken@8582
|
431 |
static size_t SDLCALL
|
slouken@8582
|
432 |
mem_write(SDL_RWops * context, const void *ptr, size_t size, size_t num)
|
slouken@8582
|
433 |
{
|
slouken@8582
|
434 |
if ((context->hidden.mem.here + (num * size)) > context->hidden.mem.stop) {
|
slouken@8582
|
435 |
num = (context->hidden.mem.stop - context->hidden.mem.here) / size;
|
slouken@8582
|
436 |
}
|
slouken@8582
|
437 |
SDL_memcpy(context->hidden.mem.here, ptr, num * size);
|
slouken@8582
|
438 |
context->hidden.mem.here += num * size;
|
icculus@8162
|
439 |
return num;
|
slouken@8582
|
440 |
}
|
slouken@8582
|
441 |
|
slouken@8582
|
442 |
static size_t SDLCALL
|
slouken@8582
|
443 |
mem_writeconst(SDL_RWops * context, const void *ptr, size_t size, size_t num)
|
slouken@8582
|
444 |
{
|
slouken@8582
|
445 |
SDL_SetError("Can't write to read-only memory");
|
icculus@8162
|
446 |
return 0;
|
slouken@8582
|
447 |
}
|
slouken@8582
|
448 |
|
slouken@8582
|
449 |
static int SDLCALL
|
slouken@8582
|
450 |
mem_close(SDL_RWops * context)
|
slouken@8582
|
451 |
{
|
slouken@8582
|
452 |
if (context) {
|
slouken@8582
|
453 |
SDL_FreeRW(context);
|
slouken@8582
|
454 |
}
|
icculus@8162
|
455 |
return 0;
|
slouken@8582
|
456 |
}
|
slouken@8582
|
457 |
|
slouken@8582
|
458 |
|
slouken@8582
|
459 |
/* Functions to create SDL_RWops structures from various data sources */
|
slouken@8582
|
460 |
|
slouken@8582
|
461 |
SDL_RWops *
|
slouken@8582
|
462 |
SDL_RWFromFile(const char *file, const char *mode)
|
slouken@8582
|
463 |
{
|
slouken@8582
|
464 |
SDL_RWops *rwops = NULL;
|
slouken@8582
|
465 |
if (!file || !*file || !mode || !*mode) {
|
slouken@8582
|
466 |
SDL_SetError("SDL_RWFromFile(): No file or no mode specified");
|
slouken@8582
|
467 |
return NULL;
|
slouken@8582
|
468 |
}
|
dimitris@8761
|
469 |
#if defined(__ANDROID__)
|
slouken@8582
|
470 |
#ifdef HAVE_STDIO_H
|
slouken@8582
|
471 |
/* Try to open the file on the filesystem first */
|
slouken@8582
|
472 |
if (*file == '/') {
|
slouken@8582
|
473 |
FILE *fp = fopen(file, mode);
|
slouken@8582
|
474 |
if (fp) {
|
slouken@8582
|
475 |
return SDL_RWFromFP(fp, 1);
|
slouken@8582
|
476 |
}
|
slouken@8582
|
477 |
} else {
|
slouken@8582
|
478 |
/* Try opening it from internal storage if it's a relative path */
|
slouken@8582
|
479 |
char *path;
|
slouken@8582
|
480 |
FILE *fp;
|
slouken@8582
|
481 |
|
slouken@8582
|
482 |
path = SDL_stack_alloc(char, PATH_MAX);
|
slouken@8582
|
483 |
if (path) {
|
slouken@8582
|
484 |
SDL_snprintf(path, PATH_MAX, "%s/%s",
|
slouken@8582
|
485 |
SDL_AndroidGetInternalStoragePath(), file);
|
slouken@8582
|
486 |
fp = fopen(path, mode);
|
slouken@8582
|
487 |
SDL_stack_free(path);
|
slouken@8582
|
488 |
if (fp) {
|
slouken@8582
|
489 |
return SDL_RWFromFP(fp, 1);
|
slouken@8582
|
490 |
}
|
slouken@8582
|
491 |
}
|
slouken@8582
|
492 |
}
|
slouken@8582
|
493 |
#endif /* HAVE_STDIO_H */
|
slouken@8582
|
494 |
|
slouken@8582
|
495 |
/* Try to open the file from the asset system */
|
slouken@8582
|
496 |
rwops = SDL_AllocRW();
|
slouken@8582
|
497 |
if (!rwops)
|
slouken@8582
|
498 |
return NULL; /* SDL_SetError already setup by SDL_AllocRW() */
|
slouken@8582
|
499 |
if (Android_JNI_FileOpen(rwops, file, mode) < 0) {
|
slouken@8582
|
500 |
SDL_FreeRW(rwops);
|
slouken@8582
|
501 |
return NULL;
|
slouken@8582
|
502 |
}
|
slouken@8582
|
503 |
rwops->size = Android_JNI_FileSize;
|
slouken@8582
|
504 |
rwops->seek = Android_JNI_FileSeek;
|
slouken@8582
|
505 |
rwops->read = Android_JNI_FileRead;
|
slouken@8582
|
506 |
rwops->write = Android_JNI_FileWrite;
|
slouken@8582
|
507 |
rwops->close = Android_JNI_FileClose;
|
slouken@8582
|
508 |
rwops->type = SDL_RWOPS_JNIFILE;
|
slouken@8582
|
509 |
|
slouken@8582
|
510 |
#elif defined(__WIN32__)
|
slouken@8582
|
511 |
rwops = SDL_AllocRW();
|
slouken@8582
|
512 |
if (!rwops)
|
slouken@8582
|
513 |
return NULL; /* SDL_SetError already setup by SDL_AllocRW() */
|
slouken@8582
|
514 |
if (windows_file_open(rwops, file, mode) < 0) {
|
slouken@8582
|
515 |
SDL_FreeRW(rwops);
|
slouken@8582
|
516 |
return NULL;
|
slouken@8582
|
517 |
}
|
slouken@8582
|
518 |
rwops->size = windows_file_size;
|
slouken@8582
|
519 |
rwops->seek = windows_file_seek;
|
slouken@8582
|
520 |
rwops->read = windows_file_read;
|
slouken@8582
|
521 |
rwops->write = windows_file_write;
|
slouken@8582
|
522 |
rwops->close = windows_file_close;
|
slouken@8582
|
523 |
rwops->type = SDL_RWOPS_WINFILE;
|
slouken@8582
|
524 |
|
slouken@8582
|
525 |
#elif HAVE_STDIO_H
|
slouken@8582
|
526 |
{
|
slouken@8582
|
527 |
#ifdef __APPLE__
|
slouken@8582
|
528 |
FILE *fp = SDL_OpenFPFromBundleOrFallback(file, mode);
|
slouken@8582
|
529 |
#elif __WINRT__
|
slouken@8582
|
530 |
FILE *fp = NULL;
|
slouken@8582
|
531 |
fopen_s(&fp, file, mode);
|
slouken@8582
|
532 |
#else
|
slouken@8582
|
533 |
FILE *fp = fopen(file, mode);
|
slouken@8582
|
534 |
#endif
|
slouken@8582
|
535 |
if (fp == NULL) {
|
slouken@8582
|
536 |
SDL_SetError("Couldn't open %s", file);
|
slouken@8582
|
537 |
} else {
|
slouken@8582
|
538 |
rwops = SDL_RWFromFP(fp, 1);
|
slouken@8582
|
539 |
}
|
slouken@8582
|
540 |
}
|
slouken@8582
|
541 |
#else
|
slouken@8582
|
542 |
SDL_SetError("SDL not compiled with stdio support");
|
slouken@8582
|
543 |
#endif /* !HAVE_STDIO_H */
|
slouken@8582
|
544 |
|
icculus@8162
|
545 |
return rwops;
|
slouken@8582
|
546 |
}
|
slouken@8582
|
547 |
|
slouken@8582
|
548 |
#ifdef HAVE_STDIO_H
|
slouken@8582
|
549 |
SDL_RWops *
|
slouken@8582
|
550 |
SDL_RWFromFP(FILE * fp, SDL_bool autoclose)
|
slouken@8582
|
551 |
{
|
slouken@8582
|
552 |
SDL_RWops *rwops = NULL;
|
slouken@8582
|
553 |
|
slouken@8582
|
554 |
rwops = SDL_AllocRW();
|
slouken@8582
|
555 |
if (rwops != NULL) {
|
slouken@8582
|
556 |
rwops->size = stdio_size;
|
slouken@8582
|
557 |
rwops->seek = stdio_seek;
|
slouken@8582
|
558 |
rwops->read = stdio_read;
|
slouken@8582
|
559 |
rwops->write = stdio_write;
|
slouken@8582
|
560 |
rwops->close = stdio_close;
|
slouken@8582
|
561 |
rwops->hidden.stdio.fp = fp;
|
slouken@8582
|
562 |
rwops->hidden.stdio.autoclose = autoclose;
|
slouken@8582
|
563 |
rwops->type = SDL_RWOPS_STDFILE;
|
slouken@8582
|
564 |
}
|
icculus@8162
|
565 |
return rwops;
|
slouken@8582
|
566 |
}
|
slouken@8582
|
567 |
#else
|
slouken@8582
|
568 |
SDL_RWops *
|
slouken@8582
|
569 |
SDL_RWFromFP(void * fp, SDL_bool autoclose)
|
slouken@8582
|
570 |
{
|
slouken@8582
|
571 |
SDL_SetError("SDL not compiled with stdio support");
|
slouken@8582
|
572 |
return NULL;
|
slouken@8582
|
573 |
}
|
slouken@8582
|
574 |
#endif /* HAVE_STDIO_H */
|
slouken@8582
|
575 |
|
slouken@8582
|
576 |
SDL_RWops *
|
slouken@8582
|
577 |
SDL_RWFromMem(void *mem, int size)
|
slouken@8582
|
578 |
{
|
slouken@8582
|
579 |
SDL_RWops *rwops = NULL;
|
slouken@8582
|
580 |
if (!mem) {
|
slouken@8582
|
581 |
SDL_InvalidParamError("mem");
|
icculus@8162
|
582 |
return rwops;
|
slouken@8582
|
583 |
}
|
slouken@8582
|
584 |
if (!size) {
|
slouken@8582
|
585 |
SDL_InvalidParamError("size");
|
icculus@8162
|
586 |
return rwops;
|
slouken@8582
|
587 |
}
|
slouken@8582
|
588 |
|
slouken@8582
|
589 |
rwops = SDL_AllocRW();
|
slouken@8582
|
590 |
if (rwops != NULL) {
|
slouken@8582
|
591 |
rwops->size = mem_size;
|
slouken@8582
|
592 |
rwops->seek = mem_seek;
|
slouken@8582
|
593 |
rwops->read = mem_read;
|
slouken@8582
|
594 |
rwops->write = mem_write;
|
slouken@8582
|
595 |
rwops->close = mem_close;
|
slouken@8582
|
596 |
rwops->hidden.mem.base = (Uint8 *) mem;
|
slouken@8582
|
597 |
rwops->hidden.mem.here = rwops->hidden.mem.base;
|
slouken@8582
|
598 |
rwops->hidden.mem.stop = rwops->hidden.mem.base + size;
|
slouken@8582
|
599 |
rwops->type = SDL_RWOPS_MEMORY;
|
slouken@8582
|
600 |
}
|
icculus@8162
|
601 |
return rwops;
|
slouken@8582
|
602 |
}
|
slouken@8582
|
603 |
|
slouken@8582
|
604 |
SDL_RWops *
|
slouken@8582
|
605 |
SDL_RWFromConstMem(const void *mem, int size)
|
slouken@8582
|
606 |
{
|
slouken@8582
|
607 |
SDL_RWops *rwops = NULL;
|
slouken@8582
|
608 |
if (!mem) {
|
slouken@8582
|
609 |
SDL_InvalidParamError("mem");
|
icculus@8162
|
610 |
return rwops;
|
slouken@8582
|
611 |
}
|
slouken@8582
|
612 |
if (!size) {
|
slouken@8582
|
613 |
SDL_InvalidParamError("size");
|
icculus@8162
|
614 |
return rwops;
|
slouken@8582
|
615 |
}
|
slouken@8582
|
616 |
|
slouken@8582
|
617 |
rwops = SDL_AllocRW();
|
slouken@8582
|
618 |
if (rwops != NULL) {
|
slouken@8582
|
619 |
rwops->size = mem_size;
|
slouken@8582
|
620 |
rwops->seek = mem_seek;
|
slouken@8582
|
621 |
rwops->read = mem_read;
|
slouken@8582
|
622 |
rwops->write = mem_writeconst;
|
slouken@8582
|
623 |
rwops->close = mem_close;
|
slouken@8582
|
624 |
rwops->hidden.mem.base = (Uint8 *) mem;
|
slouken@8582
|
625 |
rwops->hidden.mem.here = rwops->hidden.mem.base;
|
slouken@8582
|
626 |
rwops->hidden.mem.stop = rwops->hidden.mem.base + size;
|
slouken@8582
|
627 |
rwops->type = SDL_RWOPS_MEMORY_RO;
|
slouken@8582
|
628 |
}
|
icculus@8162
|
629 |
return rwops;
|
slouken@8582
|
630 |
}
|
slouken@8582
|
631 |
|
slouken@8582
|
632 |
SDL_RWops *
|
slouken@8582
|
633 |
SDL_AllocRW(void)
|
slouken@8582
|
634 |
{
|
slouken@8582
|
635 |
SDL_RWops *area;
|
slouken@8582
|
636 |
|
slouken@8582
|
637 |
area = (SDL_RWops *) SDL_malloc(sizeof *area);
|
slouken@8582
|
638 |
if (area == NULL) {
|
slouken@8582
|
639 |
SDL_OutOfMemory();
|
slouken@8582
|
640 |
} else {
|
slouken@8582
|
641 |
area->type = SDL_RWOPS_UNKNOWN;
|
slouken@8582
|
642 |
}
|
icculus@8162
|
643 |
return area;
|
slouken@8582
|
644 |
}
|
slouken@8582
|
645 |
|
slouken@8582
|
646 |
void
|
slouken@8582
|
647 |
SDL_FreeRW(SDL_RWops * area)
|
slouken@8582
|
648 |
{
|
slouken@8582
|
649 |
SDL_free(area);
|
slouken@8582
|
650 |
}
|
slouken@8582
|
651 |
|
slouken@8582
|
652 |
/* Functions for dynamically reading and writing endian-specific values */
|
slouken@8582
|
653 |
|
slouken@8582
|
654 |
Uint8
|
slouken@8582
|
655 |
SDL_ReadU8(SDL_RWops * src)
|
slouken@8582
|
656 |
{
|
slouken@8582
|
657 |
Uint8 value = 0;
|
slouken@8582
|
658 |
|
icculus@8162
|
659 |
SDL_RWread(src, &value, sizeof (value), 1);
|
slouken@8582
|
660 |
return value;
|
slouken@8582
|
661 |
}
|
slouken@8582
|
662 |
|
slouken@8582
|
663 |
Uint16
|
slouken@8582
|
664 |
SDL_ReadLE16(SDL_RWops * src)
|
slouken@8582
|
665 |
{
|
slouken@8582
|
666 |
Uint16 value = 0;
|
slouken@8582
|
667 |
|
icculus@8162
|
668 |
SDL_RWread(src, &value, sizeof (value), 1);
|
icculus@8162
|
669 |
return SDL_SwapLE16(value);
|
slouken@8582
|
670 |
}
|
slouken@8582
|
671 |
|
slouken@8582
|
672 |
Uint16
|
slouken@8582
|
673 |
SDL_ReadBE16(SDL_RWops * src)
|
slouken@8582
|
674 |
{
|
slouken@8582
|
675 |
Uint16 value = 0;
|
slouken@8582
|
676 |
|
icculus@8162
|
677 |
SDL_RWread(src, &value, sizeof (value), 1);
|
icculus@8162
|
678 |
return SDL_SwapBE16(value);
|
slouken@8582
|
679 |
}
|
slouken@8582
|
680 |
|
slouken@8582
|
681 |
Uint32
|
slouken@8582
|
682 |
SDL_ReadLE32(SDL_RWops * src)
|
slouken@8582
|
683 |
{
|
slouken@8582
|
684 |
Uint32 value = 0;
|
slouken@8582
|
685 |
|
icculus@8162
|
686 |
SDL_RWread(src, &value, sizeof (value), 1);
|
icculus@8162
|
687 |
return SDL_SwapLE32(value);
|
slouken@8582
|
688 |
}
|
slouken@8582
|
689 |
|
slouken@8582
|
690 |
Uint32
|
slouken@8582
|
691 |
SDL_ReadBE32(SDL_RWops * src)
|
slouken@8582
|
692 |
{
|
slouken@8582
|
693 |
Uint32 value = 0;
|
slouken@8582
|
694 |
|
icculus@8162
|
695 |
SDL_RWread(src, &value, sizeof (value), 1);
|
icculus@8162
|
696 |
return SDL_SwapBE32(value);
|
slouken@8582
|
697 |
}
|
slouken@8582
|
698 |
|
slouken@8582
|
699 |
Uint64
|
slouken@8582
|
700 |
SDL_ReadLE64(SDL_RWops * src)
|
slouken@8582
|
701 |
{
|
slouken@8582
|
702 |
Uint64 value = 0;
|
slouken@8582
|
703 |
|
icculus@8162
|
704 |
SDL_RWread(src, &value, sizeof (value), 1);
|
icculus@8162
|
705 |
return SDL_SwapLE64(value);
|
slouken@8582
|
706 |
}
|
slouken@8582
|
707 |
|
slouken@8582
|
708 |
Uint64
|
slouken@8582
|
709 |
SDL_ReadBE64(SDL_RWops * src)
|
slouken@8582
|
710 |
{
|
slouken@8582
|
711 |
Uint64 value = 0;
|
slouken@8582
|
712 |
|
icculus@8162
|
713 |
SDL_RWread(src, &value, sizeof (value), 1);
|
icculus@8162
|
714 |
return SDL_SwapBE64(value);
|
slouken@8582
|
715 |
}
|
slouken@8582
|
716 |
|
slouken@8582
|
717 |
size_t
|
slouken@8582
|
718 |
SDL_WriteU8(SDL_RWops * dst, Uint8 value)
|
slouken@8582
|
719 |
{
|
icculus@8162
|
720 |
return SDL_RWwrite(dst, &value, sizeof (value), 1);
|
slouken@8582
|
721 |
}
|
slouken@8582
|
722 |
|
slouken@8582
|
723 |
size_t
|
slouken@8582
|
724 |
SDL_WriteLE16(SDL_RWops * dst, Uint16 value)
|
slouken@8582
|
725 |
{
|
icculus@8162
|
726 |
const Uint16 swapped = SDL_SwapLE16(value);
|
icculus@8162
|
727 |
return SDL_RWwrite(dst, &swapped, sizeof (swapped), 1);
|
slouken@8582
|
728 |
}
|
slouken@8582
|
729 |
|
slouken@8582
|
730 |
size_t
|
slouken@8582
|
731 |
SDL_WriteBE16(SDL_RWops * dst, Uint16 value)
|
slouken@8582
|
732 |
{
|
icculus@8162
|
733 |
const Uint16 swapped = SDL_SwapBE16(value);
|
icculus@8162
|
734 |
return SDL_RWwrite(dst, &swapped, sizeof (swapped), 1);
|
slouken@8582
|
735 |
}
|
slouken@8582
|
736 |
|
slouken@8582
|
737 |
size_t
|
slouken@8582
|
738 |
SDL_WriteLE32(SDL_RWops * dst, Uint32 value)
|
slouken@8582
|
739 |
{
|
icculus@8162
|
740 |
const Uint32 swapped = SDL_SwapLE32(value);
|
icculus@8162
|
741 |
return SDL_RWwrite(dst, &swapped, sizeof (swapped), 1);
|
slouken@8582
|
742 |
}
|
slouken@8582
|
743 |
|
slouken@8582
|
744 |
size_t
|
slouken@8582
|
745 |
SDL_WriteBE32(SDL_RWops * dst, Uint32 value)
|
slouken@8582
|
746 |
{
|
icculus@8162
|
747 |
const Uint32 swapped = SDL_SwapBE32(value);
|
icculus@8162
|
748 |
return SDL_RWwrite(dst, &swapped, sizeof (swapped), 1);
|
slouken@8582
|
749 |
}
|
slouken@8582
|
750 |
|
slouken@8582
|
751 |
size_t
|
slouken@8582
|
752 |
SDL_WriteLE64(SDL_RWops * dst, Uint64 value)
|
slouken@8582
|
753 |
{
|
icculus@8162
|
754 |
const Uint64 swapped = SDL_SwapLE64(value);
|
icculus@8162
|
755 |
return SDL_RWwrite(dst, &swapped, sizeof (swapped), 1);
|
slouken@8582
|
756 |
}
|
slouken@8582
|
757 |
|
slouken@8582
|
758 |
size_t
|
slouken@8582
|
759 |
SDL_WriteBE64(SDL_RWops * dst, Uint64 value)
|
slouken@8582
|
760 |
{
|
icculus@8162
|
761 |
const Uint64 swapped = SDL_SwapBE64(value);
|
icculus@8162
|
762 |
return SDL_RWwrite(dst, &swapped, sizeof (swapped), 1);
|
slouken@8582
|
763 |
}
|
slouken@8582
|
764 |
|
slouken@8582
|
765 |
/* vi: set ts=4 sw=4 expandtab: */
|