Mercurial > SDL_sound_CoreAudio
view playsound/physfsrwops.c @ 464:182533748715 release-1.0.1
Updated.
author | Ryan C. Gordon <icculus@icculus.org> |
---|---|
date | Sun, 12 Oct 2003 19:06:27 +0000 |
parents | d8c0315deba9 |
children | 35dfa9d9782e |
line wrap: on
line source
/* * 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. * * Unless otherwise stated, the rest of PhysicsFS falls under the GNU Lesser * General Public License: http://www.gnu.org/licenses/lgpl.txt * * SDL falls under the LGPL, too. You can get SDL at http://www.libsdl.org/ * * This file was written by Ryan C. Gordon. (icculus@clutteredmind.org). */ #include <stdio.h> /* used for SEEK_SET, SEEK_CUR, SEEK_END ... */ #include "physfsrwops.h" static int physfsrwops_seek(SDL_RWops *rw, int offset, int whence) { PHYSFS_file *handle = (PHYSFS_file *) rw->hidden.unknown.data1; int pos = 0; if (whence == SEEK_SET) { pos = offset; } /* if */ else if (whence == SEEK_CUR) { PHYSFS_sint64 current = PHYSFS_tell(handle); if (current == -1) { SDL_SetError("Can't find position in file: %s", PHYSFS_getLastError()); return(-1); } /* if */ pos = (int) current; if ( ((PHYSFS_sint64) pos) != current ) { SDL_SetError("Can't fit current file position in an int!"); return(-1); } /* if */ if (offset == 0) /* this is a "tell" call. We're done. */ return(pos); pos += offset; } /* else if */ else if (whence == SEEK_END) { PHYSFS_sint64 len = PHYSFS_fileLength(handle); if (len == -1) { SDL_SetError("Can't find end of file: %s", PHYSFS_getLastError()); return(-1); } /* if */ pos = (int) len; if ( ((PHYSFS_sint64) pos) != len ) { SDL_SetError("Can't fit end-of-file position in an int!"); return(-1); } /* if */ pos += 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 */ return(pos); } /* physfsrwops_seek */ static int physfsrwops_read(SDL_RWops *rw, void *ptr, int size, int maxnum) { PHYSFS_file *handle = (PHYSFS_file *) rw->hidden.unknown.data1; PHYSFS_sint64 rc = PHYSFS_read(handle, ptr, size, maxnum); if (rc != maxnum) { if (!PHYSFS_eof(handle)) /* not EOF? Must be an error. */ SDL_SetError("PhysicsFS error: %s", PHYSFS_getLastError()); } /* if */ return((int) rc); } /* physfsrwops_read */ static int physfsrwops_write(SDL_RWops *rw, const void *ptr, int size, int num) { PHYSFS_file *handle = (PHYSFS_file *) rw->hidden.unknown.data1; PHYSFS_sint64 rc = PHYSFS_write(handle, ptr, size, num); if (rc != num) SDL_SetError("PhysicsFS error: %s", PHYSFS_getLastError()); return((int) rc); } /* 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 ... */