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Diffstat (limited to 'code/unix/SDL12/include/SDL_rwops.h')
| -rw-r--r-- | code/unix/SDL12/include/SDL_rwops.h | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/code/unix/SDL12/include/SDL_rwops.h b/code/unix/SDL12/include/SDL_rwops.h new file mode 100644 index 0000000..6ebf1bd --- /dev/null +++ b/code/unix/SDL12/include/SDL_rwops.h @@ -0,0 +1,114 @@ +/* + SDL - Simple DirectMedia Layer + Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public + License as published by the Free Software Foundation; either + version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with this library; if not, write to the Free + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + + Sam Lantinga + slouken@libsdl.org +*/ + +#ifdef SAVE_RCSID +static char rcsid = + "@(#) $Id: SDL_rwops.h,v 1.5 2002/04/11 14:35:13 slouken Exp $"; +#endif + +/* This file provides a general interface for SDL to read and write + data sources. It can easily be extended to files, memory, etc. +*/ + +#ifndef _SDL_RWops_h +#define _SDL_RWops_h + +#include <stdio.h> + +#include "SDL_types.h" + +#include "begin_code.h" +/* Set up for C function definitions, even when using C++ */ +#ifdef __cplusplus +extern "C" { +#endif + +/* This is the read/write operation structure -- very basic */ + +typedef struct SDL_RWops { + /* Seek to 'offset' relative to whence, one of stdio's whence values: + SEEK_SET, SEEK_CUR, SEEK_END + Returns the final offset in the data source. + */ + int (*seek)(struct SDL_RWops *context, int offset, int whence); + + /* Read up to 'num' objects each of size 'objsize' from the data + source to the area pointed at by 'ptr'. + Returns the number of objects read, or -1 if the read failed. + */ + int (*read)(struct SDL_RWops *context, void *ptr, int size, int maxnum); + + /* Write exactly 'num' objects each of size 'objsize' from the area + pointed at by 'ptr' to data source. + Returns 'num', or -1 if the write failed. + */ + int (*write)(struct SDL_RWops *context, const void *ptr, int size, int num); + + /* Close and free an allocated SDL_FSops structure */ + int (*close)(struct SDL_RWops *context); + + Uint32 type; + union { + struct { + int autoclose; + FILE *fp; + } stdio; + struct { + Uint8 *base; + Uint8 *here; + Uint8 *stop; + } mem; + struct { + void *data1; + } unknown; + } hidden; + +} SDL_RWops; + + +/* Functions to create SDL_RWops structures from various data sources */ + +extern DECLSPEC SDL_RWops * SDLCALL SDL_RWFromFile(const char *file, const char *mode); + +extern DECLSPEC SDL_RWops * SDLCALL SDL_RWFromFP(FILE *fp, int autoclose); + +extern DECLSPEC SDL_RWops * SDLCALL SDL_RWFromMem(void *mem, int size); + +extern DECLSPEC SDL_RWops * SDLCALL SDL_AllocRW(void); +extern DECLSPEC void SDLCALL SDL_FreeRW(SDL_RWops *area); + +/* 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, 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) + + +/* Ends C function definitions when using C++ */ +#ifdef __cplusplus +} +#endif +#include "close_code.h" + +#endif /* _SDL_RWops_h */ + |