mirror of
https://github.com/TerryCavanagh/VVVVVV.git
synced 2024-11-18 08:59:42 +01:00
146678aac4
The RWops stuff isn't a part of any standard PhysFS package (and given that it explicitly wraps around SDL I'm not sure how you _would_ package it). So we need to get the physfsrwops.h include in if BUNDLE_DEPENDENCIES is off, otherwise this results in a compile-time include-not-found failure. Additionally, I've placed the PhysFS RWops stuff in their own extras/ folder, so none of the other PhysFS stuff gets included in a -DBUNDLE_DEPENDENCIES=OFF build.
251 lines
6.8 KiB
C
251 lines
6.8 KiB
C
/*
|
|
* 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 https://www.libsdl.org/
|
|
*
|
|
* This file was written by Ryan C. Gordon. (icculus@icculus.org).
|
|
*/
|
|
|
|
#include <stdio.h> /* used for SEEK_SET, SEEK_CUR, SEEK_END ... */
|
|
#include "physfsrwops.h"
|
|
|
|
/* SDL's RWOPS interface changed a little in SDL 2.0... */
|
|
#if defined(SDL_VERSION_ATLEAST)
|
|
#if SDL_VERSION_ATLEAST(2, 0, 0)
|
|
#define TARGET_SDL2 1
|
|
#endif
|
|
#endif
|
|
|
|
#if !TARGET_SDL2
|
|
#ifndef RW_SEEK_SET
|
|
#define RW_SEEK_SET SEEK_SET
|
|
#endif
|
|
#ifndef RW_SEEK_CUR
|
|
#define RW_SEEK_CUR SEEK_CUR
|
|
#endif
|
|
#ifndef RW_SEEK_END
|
|
#define RW_SEEK_END SEEK_END
|
|
#endif
|
|
#endif
|
|
|
|
#if TARGET_SDL2
|
|
static Sint64 SDLCALL physfsrwops_size(struct SDL_RWops *rw)
|
|
{
|
|
PHYSFS_File *handle = (PHYSFS_File *) rw->hidden.unknown.data1;
|
|
return (Sint64) PHYSFS_fileLength(handle);
|
|
} /* physfsrwops_size */
|
|
#endif
|
|
|
|
|
|
#if TARGET_SDL2
|
|
static Sint64 SDLCALL physfsrwops_seek(struct SDL_RWops *rw, Sint64 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 == RW_SEEK_SET)
|
|
pos = (PHYSFS_sint64) offset;
|
|
|
|
else if (whence == RW_SEEK_CUR)
|
|
{
|
|
const PHYSFS_sint64 current = PHYSFS_tell(handle);
|
|
if (current == -1)
|
|
{
|
|
SDL_SetError("Can't find position in file: %s",
|
|
PHYSFS_getErrorByCode(PHYSFS_getLastErrorCode()));
|
|
return -1;
|
|
} /* if */
|
|
|
|
if (offset == 0) /* this is a "tell" call. We're done. */
|
|
{
|
|
#if TARGET_SDL2
|
|
return (Sint64) current;
|
|
#else
|
|
return (int) current;
|
|
#endif
|
|
} /* if */
|
|
|
|
pos = current + ((PHYSFS_sint64) offset);
|
|
} /* else if */
|
|
|
|
else if (whence == RW_SEEK_END)
|
|
{
|
|
const PHYSFS_sint64 len = PHYSFS_fileLength(handle);
|
|
if (len == -1)
|
|
{
|
|
SDL_SetError("Can't find end of file: %s", PHYSFS_getErrorByCode(PHYSFS_getLastErrorCode()));
|
|
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_getErrorByCode(PHYSFS_getLastErrorCode()));
|
|
return -1;
|
|
} /* if */
|
|
|
|
#if TARGET_SDL2
|
|
return (Sint64) pos;
|
|
#else
|
|
return (int) pos;
|
|
#endif
|
|
} /* physfsrwops_seek */
|
|
|
|
|
|
#if TARGET_SDL2
|
|
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_getErrorByCode(PHYSFS_getLastErrorCode()));
|
|
|
|
#if TARGET_SDL2
|
|
return 0;
|
|
#else
|
|
return -1;
|
|
#endif
|
|
} /* if */
|
|
} /* if */
|
|
|
|
#if TARGET_SDL2
|
|
return (size_t) rc / size;
|
|
#else
|
|
return (int) rc / size;
|
|
#endif
|
|
} /* physfsrwops_read */
|
|
|
|
|
|
#if TARGET_SDL2
|
|
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_getErrorByCode(PHYSFS_getLastErrorCode()));
|
|
|
|
#if TARGET_SDL2
|
|
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_getErrorByCode(PHYSFS_getLastErrorCode()));
|
|
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_getErrorByCode(PHYSFS_getLastErrorCode()));
|
|
else
|
|
{
|
|
retval = SDL_AllocRW();
|
|
if (retval != NULL)
|
|
{
|
|
#if TARGET_SDL2
|
|
retval->size = physfsrwops_size;
|
|
#endif
|
|
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 ... */
|
|
|