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Diffstat (limited to 'code/SDL12/include/SDL_rwops.h')
| -rw-r--r-- | code/SDL12/include/SDL_rwops.h | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/code/SDL12/include/SDL_rwops.h b/code/SDL12/include/SDL_rwops.h new file mode 100644 index 0000000..a450119 --- /dev/null +++ b/code/SDL12/include/SDL_rwops.h @@ -0,0 +1,155 @@ +/* + SDL - Simple DirectMedia Layer + Copyright (C) 1997-2009 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 sources. 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 +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 (SDLCALL *seek)(struct SDL_RWops *context, int offset, int whence); + + /** Read up to 'maxnum' objects each of size 'size' from the data + * source to the area pointed at by 'ptr'. + * Returns the number of objects read, or -1 if the read failed. + */ + int (SDLCALL *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 (SDLCALL *write)(struct SDL_RWops *context, const void *ptr, int size, int num); + + /** Close and free an allocated SDL_FSops structure */ + int (SDLCALL *close)(struct SDL_RWops *context); + + Uint32 type; + union { +#if defined(__WIN32__) && !defined(__SYMBIAN32__) + struct { + int append; + void *h; + struct { + void *data; + int size; + int left; + } buffer; + } win32io; +#endif +#ifdef HAVE_STDIO_H + struct { + int autoclose; + FILE *fp; + } stdio; +#endif + struct { + Uint8 *base; + Uint8 *here; + Uint8 *stop; + } mem; + struct { + void *data1; + } unknown; + } hidden; + +} SDL_RWops; + + +/** @name Functions to create SDL_RWops structures from various data sources */ +/*@{*/ + +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, int 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); + +extern DECLSPEC SDL_RWops * SDLCALL SDL_AllocRW(void); +extern DECLSPEC void SDLCALL SDL_FreeRW(SDL_RWops *area); + +/*@}*/ + +/** @name Seek Reference Points */ +/*@{*/ +#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 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) +/*@}*/ + +/** @name 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); +/*@}*/ + +/** @name Write an item of native format to the specified endianness */ +/*@{*/ +extern DECLSPEC int SDLCALL SDL_WriteLE16(SDL_RWops *dst, Uint16 value); +extern DECLSPEC int SDLCALL SDL_WriteBE16(SDL_RWops *dst, Uint16 value); +extern DECLSPEC int SDLCALL SDL_WriteLE32(SDL_RWops *dst, Uint32 value); +extern DECLSPEC int SDLCALL SDL_WriteBE32(SDL_RWops *dst, Uint32 value); +extern DECLSPEC int SDLCALL SDL_WriteLE64(SDL_RWops *dst, Uint64 value); +extern DECLSPEC int SDLCALL SDL_WriteBE64(SDL_RWops *dst, Uint64 value); +/*@}*/ + +/* Ends C function definitions when using C++ */ +#ifdef __cplusplus +} +#endif +#include "close_code.h" + +#endif /* _SDL_rwops_h */ |