diff -r 3bb505fc707e -r fa44e3218a08 misc/physfs/extras/physfsrwops.c --- a/misc/physfs/extras/physfsrwops.c Tue Feb 26 20:37:58 2013 -0500 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,219 +0,0 @@ -/* - * This code provides a glue layer between PhysicsFS and Simple Directmedia - * Layer's (SDL) RWops i/o abstraction. - * - * License: this code is public domain. I make no warranty that it is useful, - * correct, harmless, or environmentally safe. - * - * This particular file may be used however you like, including copying it - * verbatim into a closed-source project, exploiting it commercially, and - * removing any trace of my name from the source (although I hope you won't - * do that). I welcome enhancements and corrections to this file, but I do - * not require you to send me patches if you make changes. This code has - * NO WARRANTY. - * - * Unless otherwise stated, the rest of PhysicsFS falls under the zlib license. - * Please see LICENSE.txt in the root of the source tree. - * - * SDL 1.2 falls under the LGPL license. SDL 1.3+ is zlib, like PhysicsFS. - * You can get SDL at http://www.libsdl.org/ - * - * This file was written by Ryan C. Gordon. (icculus@icculus.org). - */ - -#include /* used for SEEK_SET, SEEK_CUR, SEEK_END ... */ -#include "physfsrwops.h" - -/* SDL's RWOPS interface changed a little in SDL 1.3... */ -#if defined(SDL_VERSION_ATLEAST) -#if SDL_VERSION_ATLEAST(1, 3, 0) -#define TARGET_SDL13 1 -#endif -#endif - -#if TARGET_SDL13 -static long SDLCALL physfsrwops_seek(struct SDL_RWops *rw, long offset, int whence) -#else -static int physfsrwops_seek(SDL_RWops *rw, int offset, int whence) -#endif -{ - PHYSFS_File *handle = (PHYSFS_File *) rw->hidden.unknown.data1; - PHYSFS_sint64 pos = 0; - - if (whence == SEEK_SET) - pos = (PHYSFS_sint64) offset; - - else if (whence == SEEK_CUR) - { - const PHYSFS_sint64 current = PHYSFS_tell(handle); - if (current == -1) - { - SDL_SetError("Can't find position in file: %s", - PHYSFS_getLastError()); - return -1; - } /* if */ - - if (offset == 0) /* this is a "tell" call. We're done. */ - { - #if TARGET_SDL13 - return (long) current; - #else - return (int) current; - #endif - } /* if */ - - pos = current + ((PHYSFS_sint64) offset); - } /* else if */ - - else if (whence == SEEK_END) - { - const PHYSFS_sint64 len = PHYSFS_fileLength(handle); - if (len == -1) - { - SDL_SetError("Can't find end of file: %s", PHYSFS_getLastError()); - return -1; - } /* if */ - - pos = len + ((PHYSFS_sint64) offset); - } /* else if */ - - else - { - SDL_SetError("Invalid 'whence' parameter."); - return -1; - } /* else */ - - if ( pos < 0 ) - { - SDL_SetError("Attempt to seek past start of file."); - return -1; - } /* if */ - - if (!PHYSFS_seek(handle, (PHYSFS_uint64) pos)) - { - SDL_SetError("PhysicsFS error: %s", PHYSFS_getLastError()); - return -1; - } /* if */ - - #if TARGET_SDL13 - return (long) pos; - #else - return (int) pos; - #endif -} /* physfsrwops_seek */ - - -#if TARGET_SDL13 -static size_t SDLCALL physfsrwops_read(struct SDL_RWops *rw, void *ptr, - size_t size, size_t maxnum) -#else -static int physfsrwops_read(SDL_RWops *rw, void *ptr, int size, int maxnum) -#endif -{ - PHYSFS_File *handle = (PHYSFS_File *) rw->hidden.unknown.data1; - const PHYSFS_uint64 readlen = (PHYSFS_uint64) (maxnum * size); - const PHYSFS_sint64 rc = PHYSFS_readBytes(handle, ptr, readlen); - if (rc != ((PHYSFS_sint64) readlen)) - { - if (!PHYSFS_eof(handle)) /* not EOF? Must be an error. */ - SDL_SetError("PhysicsFS error: %s", PHYSFS_getLastError()); - } /* if */ - - #if TARGET_SDL13 - return (size_t) rc; - #else - return (int) rc; - #endif -} /* physfsrwops_read */ - - -#if TARGET_SDL13 -static size_t SDLCALL physfsrwops_write(struct SDL_RWops *rw, const void *ptr, - size_t size, size_t num) -#else -static int physfsrwops_write(SDL_RWops *rw, const void *ptr, int size, int num) -#endif -{ - PHYSFS_File *handle = (PHYSFS_File *) rw->hidden.unknown.data1; - const PHYSFS_uint64 writelen = (PHYSFS_uint64) (num * size); - const PHYSFS_sint64 rc = PHYSFS_writeBytes(handle, ptr, writelen); - if (rc != ((PHYSFS_sint64) writelen)) - SDL_SetError("PhysicsFS error: %s", PHYSFS_getLastError()); - - #if TARGET_SDL13 - return (size_t) rc; - #else - return (int) rc; - #endif -} /* physfsrwops_write */ - - -static int physfsrwops_close(SDL_RWops *rw) -{ - PHYSFS_File *handle = (PHYSFS_File *) rw->hidden.unknown.data1; - if (!PHYSFS_close(handle)) - { - SDL_SetError("PhysicsFS error: %s", PHYSFS_getLastError()); - return -1; - } /* if */ - - SDL_FreeRW(rw); - return 0; -} /* physfsrwops_close */ - - -static SDL_RWops *create_rwops(PHYSFS_File *handle) -{ - SDL_RWops *retval = NULL; - - if (handle == NULL) - SDL_SetError("PhysicsFS error: %s", PHYSFS_getLastError()); - else - { - retval = SDL_AllocRW(); - if (retval != NULL) - { - retval->seek = physfsrwops_seek; - retval->read = physfsrwops_read; - retval->write = physfsrwops_write; - retval->close = physfsrwops_close; - retval->hidden.unknown.data1 = handle; - } /* if */ - } /* else */ - - return retval; -} /* create_rwops */ - - -SDL_RWops *PHYSFSRWOPS_makeRWops(PHYSFS_File *handle) -{ - SDL_RWops *retval = NULL; - if (handle == NULL) - SDL_SetError("NULL pointer passed to PHYSFSRWOPS_makeRWops()."); - else - retval = create_rwops(handle); - - return retval; -} /* PHYSFSRWOPS_makeRWops */ - - -SDL_RWops *PHYSFSRWOPS_openRead(const char *fname) -{ - return create_rwops(PHYSFS_openRead(fname)); -} /* PHYSFSRWOPS_openRead */ - - -SDL_RWops *PHYSFSRWOPS_openWrite(const char *fname) -{ - return create_rwops(PHYSFS_openWrite(fname)); -} /* PHYSFSRWOPS_openWrite */ - - -SDL_RWops *PHYSFSRWOPS_openAppend(const char *fname) -{ - return create_rwops(PHYSFS_openAppend(fname)); -} /* PHYSFSRWOPS_openAppend */ - - -/* end of physfsrwops.c ... */ -