Mercurial > sdl-ios-xcode
view include/SDL_rwops.h @ 5275:7aba0406c273
Frank Zago to sdl
The following patch fixes some of the bitrot for the Nintendo DS port.
The support is still basic at the moment, but it allows to run the "general"
test under the current head of tree (parent: 5269:11bd1585efb5 tip).
Most of the patch is mine, but I integrated a couple changes that John
Magnotti posted on Feb 1st.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Sat, 12 Feb 2011 11:36:56 -0800 |
parents | b530ef003506 |
children |
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/* 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: */