mirror of https://github.com/PCSX2/pcsx2.git
207 lines
6.0 KiB
C
207 lines
6.0 KiB
C
/*
|
|
SDL - Simple DirectMedia Layer
|
|
Copyright (C) 1997-2011 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
|
|
*/
|
|
|
|
/**
|
|
* \file SDL_rwops.h
|
|
*
|
|
* This file provides a general interface for SDL to read and write
|
|
* data streams. It can easily be extended to files, memory, etc.
|
|
*/
|
|
|
|
#ifndef _SDL_rwops_h
|
|
#define _SDL_rwops_h
|
|
|
|
#include "SDL_stdinc.h"
|
|
#include "SDL_error.h"
|
|
|
|
#include "begin_code.h"
|
|
/* Set up for C function definitions, even when using C++ */
|
|
#ifdef __cplusplus
|
|
/* *INDENT-OFF* */
|
|
extern "C" {
|
|
/* *INDENT-ON* */
|
|
#endif
|
|
|
|
/**
|
|
* This is the read/write operation structure -- very basic.
|
|
*/
|
|
typedef struct SDL_RWops
|
|
{
|
|
/**
|
|
* Seek to \c offset relative to \c whence, one of stdio's whence values:
|
|
* RW_SEEK_SET, RW_SEEK_CUR, RW_SEEK_END
|
|
*
|
|
* \return the final offset in the data stream.
|
|
*/
|
|
long (SDLCALL * seek) (struct SDL_RWops * context, long offset,
|
|
int whence);
|
|
|
|
/**
|
|
* Read up to \c maxnum objects each of size \c size from the data
|
|
* stream to the area pointed at by \c ptr.
|
|
*
|
|
* \return the number of objects read, or 0 at error or end of file.
|
|
*/
|
|
size_t(SDLCALL * read) (struct SDL_RWops * context, void *ptr,
|
|
size_t size, size_t maxnum);
|
|
|
|
/**
|
|
* Write exactly \c num objects each of size \c size from the area
|
|
* pointed at by \c ptr to data stream.
|
|
*
|
|
* \return the number of objects written, or 0 at error or end of file.
|
|
*/
|
|
size_t(SDLCALL * write) (struct SDL_RWops * context, const void *ptr,
|
|
size_t size, size_t num);
|
|
|
|
/**
|
|
* Close and free an allocated SDL_RWops structure.
|
|
*
|
|
* \return 0 if successful or -1 on write error when flushing data.
|
|
*/
|
|
int (SDLCALL * close) (struct SDL_RWops * context);
|
|
|
|
Uint32 type;
|
|
union
|
|
{
|
|
#ifdef __WIN32__
|
|
struct
|
|
{
|
|
SDL_bool append;
|
|
void *h;
|
|
struct
|
|
{
|
|
void *data;
|
|
size_t size;
|
|
size_t left;
|
|
} buffer;
|
|
} windowsio;
|
|
#endif
|
|
#ifdef HAVE_STDIO_H
|
|
struct
|
|
{
|
|
SDL_bool autoclose;
|
|
FILE *fp;
|
|
} stdio;
|
|
#endif
|
|
struct
|
|
{
|
|
Uint8 *base;
|
|
Uint8 *here;
|
|
Uint8 *stop;
|
|
} mem;
|
|
struct
|
|
{
|
|
void *data1;
|
|
} unknown;
|
|
} hidden;
|
|
|
|
} SDL_RWops;
|
|
|
|
|
|
/**
|
|
* \name RWFrom functions
|
|
*
|
|
* Functions to create SDL_RWops structures from various data streams.
|
|
*/
|
|
/*@{*/
|
|
|
|
extern DECLSPEC SDL_RWops *SDLCALL SDL_RWFromFile(const char *file,
|
|
const char *mode);
|
|
|
|
#ifdef HAVE_STDIO_H
|
|
extern DECLSPEC SDL_RWops *SDLCALL SDL_RWFromFP(FILE * fp,
|
|
SDL_bool autoclose);
|
|
#else
|
|
extern DECLSPEC SDL_RWops *SDLCALL SDL_RWFromFP(void * fp,
|
|
SDL_bool autoclose);
|
|
#endif
|
|
|
|
extern DECLSPEC SDL_RWops *SDLCALL SDL_RWFromMem(void *mem, int size);
|
|
extern DECLSPEC SDL_RWops *SDLCALL SDL_RWFromConstMem(const void *mem,
|
|
int size);
|
|
|
|
/*@}*//*RWFrom functions*/
|
|
|
|
|
|
extern DECLSPEC SDL_RWops *SDLCALL SDL_AllocRW(void);
|
|
extern DECLSPEC void SDLCALL SDL_FreeRW(SDL_RWops * area);
|
|
|
|
#define RW_SEEK_SET 0 /**< Seek from the beginning of data */
|
|
#define RW_SEEK_CUR 1 /**< Seek relative to current read point */
|
|
#define RW_SEEK_END 2 /**< Seek relative to the end of data */
|
|
|
|
/**
|
|
* \name Read/write macros
|
|
*
|
|
* Macros to easily read and write from an SDL_RWops structure.
|
|
*/
|
|
/*@{*/
|
|
#define SDL_RWseek(ctx, offset, whence) (ctx)->seek(ctx, offset, whence)
|
|
#define SDL_RWtell(ctx) (ctx)->seek(ctx, 0, RW_SEEK_CUR)
|
|
#define SDL_RWread(ctx, ptr, size, n) (ctx)->read(ctx, ptr, size, n)
|
|
#define SDL_RWwrite(ctx, ptr, size, n) (ctx)->write(ctx, ptr, size, n)
|
|
#define SDL_RWclose(ctx) (ctx)->close(ctx)
|
|
/*@}*//*Read/write macros*/
|
|
|
|
|
|
/**
|
|
* \name Read endian functions
|
|
*
|
|
* Read an item of the specified endianness and return in native format.
|
|
*/
|
|
/*@{*/
|
|
extern DECLSPEC Uint16 SDLCALL SDL_ReadLE16(SDL_RWops * src);
|
|
extern DECLSPEC Uint16 SDLCALL SDL_ReadBE16(SDL_RWops * src);
|
|
extern DECLSPEC Uint32 SDLCALL SDL_ReadLE32(SDL_RWops * src);
|
|
extern DECLSPEC Uint32 SDLCALL SDL_ReadBE32(SDL_RWops * src);
|
|
extern DECLSPEC Uint64 SDLCALL SDL_ReadLE64(SDL_RWops * src);
|
|
extern DECLSPEC Uint64 SDLCALL SDL_ReadBE64(SDL_RWops * src);
|
|
/*@}*//*Read endian functions*/
|
|
|
|
/**
|
|
* \name Write endian functions
|
|
*
|
|
* Write an item of native format to the specified endianness.
|
|
*/
|
|
/*@{*/
|
|
extern DECLSPEC size_t SDLCALL SDL_WriteLE16(SDL_RWops * dst, Uint16 value);
|
|
extern DECLSPEC size_t SDLCALL SDL_WriteBE16(SDL_RWops * dst, Uint16 value);
|
|
extern DECLSPEC size_t SDLCALL SDL_WriteLE32(SDL_RWops * dst, Uint32 value);
|
|
extern DECLSPEC size_t SDLCALL SDL_WriteBE32(SDL_RWops * dst, Uint32 value);
|
|
extern DECLSPEC size_t SDLCALL SDL_WriteLE64(SDL_RWops * dst, Uint64 value);
|
|
extern DECLSPEC size_t SDLCALL SDL_WriteBE64(SDL_RWops * dst, Uint64 value);
|
|
/*@}*//*Write endian functions*/
|
|
|
|
|
|
/* Ends C function definitions when using C++ */
|
|
#ifdef __cplusplus
|
|
/* *INDENT-OFF* */
|
|
}
|
|
/* *INDENT-ON* */
|
|
#endif
|
|
#include "close_code.h"
|
|
|
|
#endif /* _SDL_rwops_h */
|
|
|
|
/* vi: set ts=4 sw=4 expandtab: */
|