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physfs.c
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/**
* PhysicsFS; a portable, flexible file i/o abstraction.
*
* Documentation is in physfs.h. It's verbose, honest. :)
*
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* Please see the file LICENSE.txt in the source's root directory.
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*
* This file written by Ryan C. Gordon.
*/
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/* !!! FIXME: ERR_PAST_EOF shouldn't trigger for reads. Just return zero. */
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#define __PHYSICSFS_INTERNAL__
#include "physfs_internal.h"
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typedef struct __PHYSFS_DIRHANDLE__
{
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void *opaque; /* Instance data unique to the archiver. */
char *dirName; /* Path to archive in platform-dependent notation. */
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char *mountPoint; /* Mountpoint in virtual file tree. */
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const PHYSFS_Archiver *funcs; /* Ptr to archiver info for this handle. */
struct __PHYSFS_DIRHANDLE__ *next; /* linked list stuff. */
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} DirHandle;
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typedef struct __PHYSFS_FILEHANDLE__
{
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PHYSFS_Io *io; /* Instance data unique to the archiver for this file. */
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PHYSFS_uint8 forReading; /* Non-zero if reading, zero if write/append */
const DirHandle *dirHandle; /* Archiver instance that created this */
PHYSFS_uint8 *buffer; /* Buffer, if set (NULL otherwise). Don't touch! */
PHYSFS_uint32 bufsize; /* Bufsize, if set (0 otherwise). Don't touch! */
PHYSFS_uint32 buffill; /* Buffer fill size. Don't touch! */
PHYSFS_uint32 bufpos; /* Buffer position. Don't touch! */
struct __PHYSFS_FILEHANDLE__ *next; /* linked list stuff. */
} FileHandle;
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typedef struct __PHYSFS_ERRMSGTYPE__
{
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void *tid;
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int errorAvailable;
char errorString[80];
struct __PHYSFS_ERRMSGTYPE__ *next;
} ErrMsg;
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/* The various i/o drivers...some of these may not be compiled in. */
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extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_ZIP;
extern const PHYSFS_Archiver __PHYSFS_Archiver_ZIP;
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extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_LZMA;
extern const PHYSFS_Archiver __PHYSFS_Archiver_LZMA;
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extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_GRP;
extern const PHYSFS_Archiver __PHYSFS_Archiver_GRP;
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_QPAK;
extern const PHYSFS_Archiver __PHYSFS_Archiver_QPAK;
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_HOG;
extern const PHYSFS_Archiver __PHYSFS_Archiver_HOG;
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_MVL;
extern const PHYSFS_Archiver __PHYSFS_Archiver_MVL;
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_WAD;
extern const PHYSFS_Archiver __PHYSFS_Archiver_WAD;
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extern const PHYSFS_Archiver __PHYSFS_Archiver_DIR;
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extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_ISO9660;
extern const PHYSFS_Archiver __PHYSFS_Archiver_ISO9660;
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static const PHYSFS_ArchiveInfo *supported_types[] =
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{
#if (defined PHYSFS_SUPPORTS_ZIP)
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&__PHYSFS_ArchiveInfo_ZIP,
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#endif
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#if (defined PHYSFS_SUPPORTS_7Z)
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&__PHYSFS_ArchiveInfo_LZMA,
#endif
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#if (defined PHYSFS_SUPPORTS_GRP)
&__PHYSFS_ArchiveInfo_GRP,
#endif
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#if (defined PHYSFS_SUPPORTS_QPAK)
&__PHYSFS_ArchiveInfo_QPAK,
#endif
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#if (defined PHYSFS_SUPPORTS_HOG)
&__PHYSFS_ArchiveInfo_HOG,
#endif
#if (defined PHYSFS_SUPPORTS_MVL)
&__PHYSFS_ArchiveInfo_MVL,
#endif
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#if (defined PHYSFS_SUPPORTS_WAD)
&__PHYSFS_ArchiveInfo_WAD,
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#endif
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#if (defined PHYSFS_SUPPORTS_ISO9660)
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&__PHYSFS_ArchiveInfo_ISO9660,
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#endif
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NULL
};
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static const PHYSFS_Archiver *archivers[] =
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{
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&__PHYSFS_Archiver_ZIP,
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#endif
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#if (defined PHYSFS_SUPPORTS_7Z)
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&__PHYSFS_Archiver_LZMA,
#endif
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#if (defined PHYSFS_SUPPORTS_GRP)
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&__PHYSFS_Archiver_GRP,
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#endif
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#if (defined PHYSFS_SUPPORTS_QPAK)
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&__PHYSFS_Archiver_QPAK,
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#endif
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#if (defined PHYSFS_SUPPORTS_HOG)
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&__PHYSFS_Archiver_HOG,
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#endif
#if (defined PHYSFS_SUPPORTS_MVL)
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&__PHYSFS_Archiver_MVL,
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#endif
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#if (defined PHYSFS_SUPPORTS_WAD)
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&__PHYSFS_Archiver_WAD,
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#endif
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#if (defined PHYSFS_SUPPORTS_ISO9660)
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&__PHYSFS_Archiver_ISO9660,
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#endif
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NULL
};
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/* General PhysicsFS state ... */
static int initialized = 0;
static ErrMsg *errorMessages = NULL;
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static DirHandle *searchPath = NULL;
static DirHandle *writeDir = NULL;
static FileHandle *openWriteList = NULL;
static FileHandle *openReadList = NULL;
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static char *baseDir = NULL;
static char *userDir = NULL;
static int allowSymLinks = 0;
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/* mutexes ... */
static void *errorLock = NULL; /* protects error message list. */
static void *stateLock = NULL; /* protects other PhysFS static state. */
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/* allocator ... */
static int externalAllocator = 0;
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PHYSFS_Allocator allocator;
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/* PHYSFS_Io implementation for i/o to physical filesystem... */
/* !!! FIXME: maybe refcount the paths in a string pool? */
typedef struct __PHYSFS_NativeIoInfo
{
void *handle;
const char *path;
int mode; /* 'r', 'w', or 'a' */
} NativeIoInfo;
static PHYSFS_sint64 nativeIo_read(PHYSFS_Io *io, void *buf, PHYSFS_uint64 len)
{
NativeIoInfo *info = (NativeIoInfo *) io->opaque;
return __PHYSFS_platformRead(info->handle, buf, len);
} /* nativeIo_read */
static PHYSFS_sint64 nativeIo_write(PHYSFS_Io *io, const void *buffer,
PHYSFS_uint64 len)
{
NativeIoInfo *info = (NativeIoInfo *) io->opaque;
return __PHYSFS_platformWrite(info->handle, buffer, len);
} /* nativeIo_write */
static int nativeIo_seek(PHYSFS_Io *io, PHYSFS_uint64 offset)
{
NativeIoInfo *info = (NativeIoInfo *) io->opaque;
return __PHYSFS_platformSeek(info->handle, offset);
} /* nativeIo_seek */
static PHYSFS_sint64 nativeIo_tell(PHYSFS_Io *io)
{
NativeIoInfo *info = (NativeIoInfo *) io->opaque;
return __PHYSFS_platformTell(info->handle);
} /* nativeIo_tell */
static PHYSFS_sint64 nativeIo_length(PHYSFS_Io *io)
{
NativeIoInfo *info = (NativeIoInfo *) io->opaque;
return __PHYSFS_platformFileLength(info->handle);
} /* nativeIo_length */
static PHYSFS_Io *nativeIo_duplicate(PHYSFS_Io *io)
{
NativeIoInfo *info = (NativeIoInfo *) io->opaque;
return __PHYSFS_createNativeIo(info->path, info->mode);
} /* nativeIo_duplicate */
static int nativeIo_flush(PHYSFS_Io *io)
{
return __PHYSFS_platformFlush(io->opaque);
} /* nativeIo_flush */
static void nativeIo_destroy(PHYSFS_Io *io)
{
NativeIoInfo *info = (NativeIoInfo *) io->opaque;
__PHYSFS_platformClose(info->handle);
allocator.Free((void *) info->path);
allocator.Free(info);
allocator.Free(io);
} /* nativeIo_destroy */
static const PHYSFS_Io __PHYSFS_nativeIoInterface =
{
nativeIo_read,
nativeIo_write,
nativeIo_seek,
nativeIo_tell,
nativeIo_length,
nativeIo_duplicate,
nativeIo_flush,
nativeIo_destroy,
NULL
};
PHYSFS_Io *__PHYSFS_createNativeIo(const char *path, const int mode)
{
PHYSFS_Io *io = NULL;
NativeIoInfo *info = NULL;
void *handle = NULL;
char *pathdup = NULL;
assert((mode == 'r') || (mode == 'w') || (mode == 'a'));
io = (PHYSFS_Io *) allocator.Malloc(sizeof (PHYSFS_Io));
GOTO_IF_MACRO(io == NULL, ERR_OUT_OF_MEMORY, createNativeIo_failed);
info = (NativeIoInfo *) allocator.Malloc(sizeof (NativeIoInfo));
GOTO_IF_MACRO(info == NULL, ERR_OUT_OF_MEMORY, createNativeIo_failed);
pathdup = (char *) allocator.Malloc(strlen(path) + 1);
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GOTO_IF_MACRO(pathdup == NULL, ERR_OUT_OF_MEMORY, createNativeIo_failed);
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if (mode == 'r')
handle = __PHYSFS_platformOpenRead(path);
else if (mode == 'w')
handle = __PHYSFS_platformOpenWrite(path);
else if (mode == 'a')
handle = __PHYSFS_platformOpenAppend(path);
GOTO_IF_MACRO(handle == NULL, NULL, createNativeIo_failed);
strcpy(pathdup, path);
info->handle = handle;
info->path = pathdup;
info->mode = mode;
memcpy(io, &__PHYSFS_nativeIoInterface, sizeof (*io));
io->opaque = info;
return io;
createNativeIo_failed:
if (handle != NULL) __PHYSFS_platformClose(handle);
if (pathdup != NULL) allocator.Free(pathdup);
if (info != NULL) allocator.Free(info);
if (io != NULL) allocator.Free(io);
return NULL;
} /* __PHYSFS_createNativeIo */
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/* PHYSFS_Io implementation for i/o to a memory buffer... */
typedef struct __PHYSFS_MemoryIoInfo
{
const PHYSFS_uint8 *buf;
PHYSFS_uint64 len;
PHYSFS_uint64 pos;
PHYSFS_Io *parent;
volatile PHYSFS_uint32 refcount;
void (*destruct)(void *);
} MemoryIoInfo;
static PHYSFS_sint64 memoryIo_read(PHYSFS_Io *io, void *buf, PHYSFS_uint64 len)
{
MemoryIoInfo *info = (MemoryIoInfo *) io->opaque;
const PHYSFS_uint64 avail = info->len - info->pos;
assert(avail <= info->len);
if (avail == 0)
return 0; /* we're at EOF; nothing to do. */
if (len > avail)
len = avail;
memcpy(buf, info->buf + info->pos, len);
info->pos += len;
return len;
} /* memoryIo_read */
static PHYSFS_sint64 memoryIo_write(PHYSFS_Io *io, const void *buffer,
PHYSFS_uint64 len)
{
BAIL_MACRO(ERR_NOT_SUPPORTED, -1);
} /* memoryIo_write */
static int memoryIo_seek(PHYSFS_Io *io, PHYSFS_uint64 offset)
{
MemoryIoInfo *info = (MemoryIoInfo *) io->opaque;
BAIL_IF_MACRO(offset > info->len, ERR_PAST_EOF, 0);
info->pos = offset;
return 1;
} /* memoryIo_seek */
static PHYSFS_sint64 memoryIo_tell(PHYSFS_Io *io)
{
const MemoryIoInfo *info = (MemoryIoInfo *) io->opaque;
return (PHYSFS_sint64) info->pos;
} /* memoryIo_tell */
static PHYSFS_sint64 memoryIo_length(PHYSFS_Io *io)
{
const MemoryIoInfo *info = (MemoryIoInfo *) io->opaque;
return (PHYSFS_sint64) info->len;
} /* memoryIo_length */
static PHYSFS_Io *memoryIo_duplicate(PHYSFS_Io *io)
{
MemoryIoInfo *info = (MemoryIoInfo *) io->opaque;
MemoryIoInfo *newinfo = NULL;
PHYSFS_Io *parent = info->parent;
PHYSFS_Io *retval = NULL;
/* avoid deep copies. */
assert((!parent) || (!((MemoryIoInfo *) parent->opaque)->parent) );
/* share the buffer between duplicates. */
if (parent != NULL) /* dup the parent, increment its refcount. */
return parent->duplicate(parent);
/* we're the parent. */
retval = (PHYSFS_Io *) allocator.Malloc(sizeof (PHYSFS_Io));
BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
newinfo = (MemoryIoInfo *) allocator.Malloc(sizeof (MemoryIoInfo));
if (!newinfo)
{
allocator.Free(retval);
BAIL_MACRO(ERR_OUT_OF_MEMORY, NULL);
} /* if */
/* !!! FIXME: want lockless atomic increment. */
__PHYSFS_platformGrabMutex(stateLock);
info->refcount++;
__PHYSFS_platformReleaseMutex(stateLock);
memset(newinfo, '\0', sizeof (*info));
newinfo->buf = info->buf;
newinfo->len = info->len;
newinfo->pos = 0;
newinfo->parent = io;
newinfo->refcount = 0;
newinfo->destruct = NULL;
memcpy(retval, io, sizeof (*retval));
retval->opaque = newinfo;
return retval;
} /* memoryIo_duplicate */
static int memoryIo_flush(PHYSFS_Io *io) { return 1; /* it's read-only. */ }
static void memoryIo_destroy(PHYSFS_Io *io)
{
MemoryIoInfo *info = (MemoryIoInfo *) io->opaque;
PHYSFS_Io *parent = info->parent;
int should_die = 0;
if (parent != NULL)
{
assert(info->buf == ((MemoryIoInfo *) info->parent->opaque)->buf);
assert(info->len == ((MemoryIoInfo *) info->parent->opaque)->len);
assert(info->refcount == 0);
assert(info->destruct == NULL);
allocator.Free(info);
allocator.Free(io);
parent->destroy(parent); /* decrements refcount. */
return;
} /* if */
/* we _are_ the parent. */
assert(info->refcount > 0); /* even in a race, we hold a reference. */
/* !!! FIXME: want lockless atomic decrement. */
__PHYSFS_platformGrabMutex(stateLock);
info->refcount--;
should_die = (info->refcount == 0);
__PHYSFS_platformReleaseMutex(stateLock);
if (should_die)
{
void (*destruct)(void *) = info->destruct;
void *buf = (void *) info->buf;
io->opaque = NULL; /* kill this here in case of race. */
destruct = info->destruct;
allocator.Free(info);
allocator.Free(io);
if (destruct != NULL)
destruct(buf);
} /* if */
} /* memoryIo_destroy */
static const PHYSFS_Io __PHYSFS_memoryIoInterface =
{
memoryIo_read,
memoryIo_write,
memoryIo_seek,
memoryIo_tell,
memoryIo_length,
memoryIo_duplicate,
memoryIo_flush,
memoryIo_destroy,
NULL
};
PHYSFS_Io *__PHYSFS_createMemoryIo(const void *buf, PHYSFS_uint64 len,
void (*destruct)(void *))
{
PHYSFS_Io *io = NULL;
MemoryIoInfo *info = NULL;
io = (PHYSFS_Io *) allocator.Malloc(sizeof (PHYSFS_Io));
GOTO_IF_MACRO(io == NULL, ERR_OUT_OF_MEMORY, createMemoryIo_failed);
info = (MemoryIoInfo *) allocator.Malloc(sizeof (MemoryIoInfo));
GOTO_IF_MACRO(info == NULL, ERR_OUT_OF_MEMORY, createMemoryIo_failed);
memset(info, '\0', sizeof (*info));
info->buf = (const PHYSFS_uint8 *) buf;
info->len = len;
info->pos = 0;
info->parent = NULL;
info->refcount = 1;
info->destruct = destruct;
memcpy(io, &__PHYSFS_memoryIoInterface, sizeof (*io));
io->opaque = info;
return io;
createMemoryIo_failed:
if (info != NULL) allocator.Free(info);
if (io != NULL) allocator.Free(io);
return NULL;
} /* __PHYSFS_createMemoryIo */
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/* PHYSFS_Io implementation for i/o to a PHYSFS_File... */
static PHYSFS_sint64 handleIo_read(PHYSFS_Io *io, void *buf, PHYSFS_uint64 len)
{
return PHYSFS_readBytes((PHYSFS_File *) io->opaque, buf, len);
} /* handleIo_read */
static PHYSFS_sint64 handleIo_write(PHYSFS_Io *io, const void *buffer,
PHYSFS_uint64 len)
{
return PHYSFS_writeBytes((PHYSFS_File *) io->opaque, buffer, len);
} /* handleIo_write */
static int handleIo_seek(PHYSFS_Io *io, PHYSFS_uint64 offset)
{
return PHYSFS_seek((PHYSFS_File *) io->opaque, offset);
} /* handleIo_seek */
static PHYSFS_sint64 handleIo_tell(PHYSFS_Io *io)
{
return PHYSFS_tell((PHYSFS_File *) io->opaque);
} /* handleIo_tell */
static PHYSFS_sint64 handleIo_length(PHYSFS_Io *io)
{
return PHYSFS_fileLength((PHYSFS_File *) io->opaque);
} /* handleIo_length */
static PHYSFS_Io *handleIo_duplicate(PHYSFS_Io *io)
{
/*
* There's no duplicate at the PHYSFS_File level, so we break the
* abstraction. We're allowed to: we're physfs.c!
*/
FileHandle *origfh = (FileHandle *) io->opaque;
FileHandle *newfh = (FileHandle *) allocator.Malloc(sizeof (FileHandle));
PHYSFS_Io *retval = NULL;
GOTO_IF_MACRO(newfh == NULL, ERR_OUT_OF_MEMORY, handleIo_dupe_failed);
memset(newfh, '\0', sizeof (*newfh));
retval = (PHYSFS_Io *) allocator.Malloc(sizeof (PHYSFS_Io));
GOTO_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, handleIo_dupe_failed);
#if 0 /* we don't buffer the duplicate, at least not at the moment. */
if (origfh->buffer != NULL)
{
newfh->buffer = (PHYSFS_uint8 *) allocator.Malloc(origfh->bufsize);
GOTO_IF_MACRO(!newfh->buffer, ERR_OUT_OF_MEMORY, handleIo_dupe_failed);
newfh->bufsize = origfh->bufsize;
} /* if */
#endif
newfh->io = origfh->io->duplicate(origfh->io);
GOTO_IF_MACRO(newfh->io == NULL, NULL, handleIo_dupe_failed);
newfh->forReading = origfh->forReading;
newfh->dirHandle = origfh->dirHandle;
__PHYSFS_platformGrabMutex(stateLock);
if (newfh->forReading)
{
newfh->next = openReadList;
openReadList = newfh;
} /* if */
else
{
newfh->next = openWriteList;
openWriteList = newfh;
} /* else */
__PHYSFS_platformReleaseMutex(stateLock);
memcpy(retval, io, sizeof (PHYSFS_Io));
retval->opaque = newfh;
return retval;
handleIo_dupe_failed:
if (newfh)
{
if (newfh->io != NULL) newfh->io->destroy(newfh->io);
if (newfh->buffer != NULL) allocator.Free(newfh->buffer);
allocator.Free(newfh);
} /* if */
return NULL;
} /* handleIo_duplicate */
static int handleIo_flush(PHYSFS_Io *io)
{
return PHYSFS_flush((PHYSFS_File *) io->opaque);
} /* handleIo_flush */
static void handleIo_destroy(PHYSFS_Io *io)
{
if (io->opaque != NULL)
PHYSFS_close((PHYSFS_File *) io->opaque);
allocator.Free(io);
} /* handleIo_destroy */
static const PHYSFS_Io __PHYSFS_handleIoInterface =
{
handleIo_read,
handleIo_write,
handleIo_seek,
handleIo_tell,
handleIo_length,
handleIo_duplicate,
handleIo_flush,
handleIo_destroy,
NULL
};
static PHYSFS_Io *__PHYSFS_createHandleIo(PHYSFS_File *f)
{
PHYSFS_Io *io = (PHYSFS_Io *) allocator.Malloc(sizeof (PHYSFS_Io));
BAIL_IF_MACRO(io == NULL, ERR_OUT_OF_MEMORY, NULL);
memcpy(io, &__PHYSFS_handleIoInterface, sizeof (*io));
io->opaque = f;
return io;
} /* __PHYSFS_createHandleIo */
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/* functions ... */
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typedef struct
{
char **list;
PHYSFS_uint32 size;
const char *errorstr;
} EnumStringListCallbackData;
static void enumStringListCallback(void *data, const char *str)
{
void *ptr;
char *newstr;
EnumStringListCallbackData *pecd = (EnumStringListCallbackData *) data;
if (pecd->errorstr)
return;
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ptr = allocator.Realloc(pecd->list, (pecd->size + 2) * sizeof (char *));
newstr = (char *) allocator.Malloc(strlen(str) + 1);
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if (ptr != NULL)
pecd->list = (char **) ptr;
if ((ptr == NULL) || (newstr == NULL))
{
pecd->errorstr = ERR_OUT_OF_MEMORY;
pecd->list[pecd->size] = NULL;
PHYSFS_freeList(pecd->list);
return;
} /* if */
strcpy(newstr, str);
pecd->list[pecd->size] = newstr;
pecd->size++;
} /* enumStringListCallback */
static char **doEnumStringList(void (*func)(PHYSFS_StringCallback, void *))
{
EnumStringListCallbackData ecd;
memset(&ecd, '\0', sizeof (ecd));
612
ecd.list = (char **) allocator.Malloc(sizeof (char *));
613
614
615
616
BAIL_IF_MACRO(ecd.list == NULL, ERR_OUT_OF_MEMORY, NULL);
func(enumStringListCallback, &ecd);
BAIL_IF_MACRO(ecd.errorstr != NULL, ecd.errorstr, NULL);
ecd.list[ecd.size] = NULL;
617
return ecd.list;
618
619
620
} /* doEnumStringList */
621
static void __PHYSFS_bubble_sort(void *a, PHYSFS_uint32 lo, PHYSFS_uint32 hi,
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
int (*cmpfn)(void *, PHYSFS_uint32, PHYSFS_uint32),
void (*swapfn)(void *, PHYSFS_uint32, PHYSFS_uint32))
{
PHYSFS_uint32 i;
int sorted;
do
{
sorted = 1;
for (i = lo; i < hi; i++)
{
if (cmpfn(a, i, i + 1) > 0)
{
swapfn(a, i, i + 1);
sorted = 0;
} /* if */
} /* for */
} while (!sorted);
} /* __PHYSFS_bubble_sort */
643
static void __PHYSFS_quick_sort(void *a, PHYSFS_uint32 lo, PHYSFS_uint32 hi,
644
645
646
647
648
649
650
int (*cmpfn)(void *, PHYSFS_uint32, PHYSFS_uint32),
void (*swapfn)(void *, PHYSFS_uint32, PHYSFS_uint32))
{
PHYSFS_uint32 i;
PHYSFS_uint32 j;
PHYSFS_uint32 v;
651
if ((hi - lo) <= PHYSFS_QUICKSORT_THRESHOLD)
652
653
__PHYSFS_bubble_sort(a, lo, hi, cmpfn, swapfn);
else
654
655
{
i = (hi + lo) / 2;
656
657
if (cmpfn(a, lo, i) > 0) swapfn(a, lo, i);
658
659
660
661
662
663
664
665
666
667
668
669
if (cmpfn(a, lo, hi) > 0) swapfn(a, lo, hi);
if (cmpfn(a, i, hi) > 0) swapfn(a, i, hi);
j = hi - 1;
swapfn(a, i, j);
i = lo;
v = j;
while (1)
{
while(cmpfn(a, ++i, v) < 0) { /* do nothing */ }
while(cmpfn(a, --j, v) > 0) { /* do nothing */ }
if (j < i)
670
break;
671
672
swapfn(a, i, j);
} /* while */
673
674
if (i != (hi-1))
swapfn(a, i, hi-1);
675
676
677
__PHYSFS_quick_sort(a, lo, j, cmpfn, swapfn);
__PHYSFS_quick_sort(a, i+1, hi, cmpfn, swapfn);
} /* else */
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
} /* __PHYSFS_quick_sort */
void __PHYSFS_sort(void *entries, PHYSFS_uint32 max,
int (*cmpfn)(void *, PHYSFS_uint32, PHYSFS_uint32),
void (*swapfn)(void *, PHYSFS_uint32, PHYSFS_uint32))
{
/*
* Quicksort w/ Bubblesort fallback algorithm inspired by code from here:
* http://www.cs.ubc.ca/spider/harrison/Java/sorting-demo.html
*/
__PHYSFS_quick_sort(entries, 0, max - 1, cmpfn, swapfn);
} /* __PHYSFS_sort */
693
694
695
static ErrMsg *findErrorForCurrentThread(void)
{
ErrMsg *i;
696
void *tid;
697
698
if (errorLock != NULL)
699
700
__PHYSFS_platformGrabMutex(errorLock);
701
702
if (errorMessages != NULL)
{
703
tid = __PHYSFS_platformGetThreadID();
704
705
706
707
for (i = errorMessages; i != NULL; i = i->next)
{
if (i->tid == tid)
708
{
709
710
if (errorLock != NULL)
__PHYSFS_platformReleaseMutex(errorLock);
711
return i;
712
} /* if */
713
714
} /* for */
} /* if */
715
716
if (errorLock != NULL)
717
__PHYSFS_platformReleaseMutex(errorLock);
718
719
return NULL; /* no error available. */
720
721
722
} /* findErrorForCurrentThread */
723
void __PHYSFS_setError(const char *str)
724
{
725
726
727
728
729
730
ErrMsg *err;
if (str == NULL)
return;
err = findErrorForCurrentThread();
731
732
733
if (err == NULL)
{
734
err = (ErrMsg *) allocator.Malloc(sizeof (ErrMsg));
735
736
737
if (err == NULL)
return; /* uhh...? */
738
memset((void *) err, '\0', sizeof (ErrMsg));
739
err->tid = __PHYSFS_platformGetThreadID();
740
741
742
743
if (errorLock != NULL)
__PHYSFS_platformGrabMutex(errorLock);
744
745
err->next = errorMessages;
errorMessages = err;
746
747
748
if (errorLock != NULL)
__PHYSFS_platformReleaseMutex(errorLock);
749
750
751
752
753
} /* if */
err->errorAvailable = 1;
strncpy(err->errorString, str, sizeof (err->errorString));
err->errorString[sizeof (err->errorString) - 1] = '\0';
754
} /* __PHYSFS_setError */
755
756
757
758
759
760
761
const char *PHYSFS_getLastError(void)
{
ErrMsg *err = findErrorForCurrentThread();
if ((err == NULL) || (!err->errorAvailable))
762
return NULL;
763
764
err->errorAvailable = 0;
765
return err->errorString;
766
767
768
769
} /* PHYSFS_getLastError */
/* MAKE SURE that errorLock is held before calling this! */
770
771
772
773
774
775
776
static void freeErrorMessages(void)
{
ErrMsg *i;
ErrMsg *next;
for (i = errorMessages; i != NULL; i = next)
{
777
next = i->next;
778
allocator.Free(i);
779
} /* for */
780
781
errorMessages = NULL;
782
783
784
} /* freeErrorMessages */
785
786
787
788
789
790
791
792
793
794
795
void PHYSFS_getLinkedVersion(PHYSFS_Version *ver)
{
if (ver != NULL)
{
ver->major = PHYSFS_VER_MAJOR;
ver->minor = PHYSFS_VER_MINOR;
ver->patch = PHYSFS_VER_PATCH;
} /* if */
} /* PHYSFS_getLinkedVersion */
796
797
static const char *find_filename_extension(const char *fname)
{
798
799
const char *retval = NULL;
if (fname != NULL)
800
{
801
802
const char *p = strchr(fname, '.');
retval = p;
803
804
805
806
807
808
809
810
811
812
813
while (p != NULL)
{
p = strchr(p + 1, '.');
if (p != NULL)
retval = p;
} /* while */
if (retval != NULL)
retval++; /* skip '.' */
} /* if */
814
815
return retval;
816
817
818
} /* find_filename_extension */
819
static DirHandle *tryOpenDir(PHYSFS_Io *io, const PHYSFS_Archiver *funcs,
820
const char *d, int forWriting)
821
822
{
DirHandle *retval = NULL;
823
824
825
826
827
828
void *opaque = NULL;
if (io != NULL)
BAIL_IF_MACRO(!io->seek(io, 0), NULL, NULL);
opaque = funcs->openArchive(io, d, forWriting);
829
if (opaque != NULL)
830
{
831
832
833
834
retval = (DirHandle *) allocator.Malloc(sizeof (DirHandle));
if (retval == NULL)
funcs->dirClose(opaque);
else
835
{
836
837
838
839
840
memset(retval, '\0', sizeof (DirHandle));
retval->mountPoint = NULL;
retval->funcs = funcs;
retval->opaque = opaque;
} /* else */
841
842
} /* if */
843
return retval;
844
845
846
} /* tryOpenDir */
847
static DirHandle *openDirectory(PHYSFS_Io *io, const char *d, int forWriting)
848
{
849
DirHandle *retval = NULL;
850
const PHYSFS_Archiver **i;
851
const char *ext;
852
853
assert((io != NULL) || (d != NULL));
854
855
856
857
858
859
860
861
862
863
864
if (io == NULL)
{
/* DIR gets first shot (unlike the rest, it doesn't deal with files). */
retval = tryOpenDir(io, &__PHYSFS_Archiver_DIR, d, forWriting);
if (retval != NULL)
return retval;
io = __PHYSFS_createNativeIo(d, forWriting ? 'w' : 'r');
BAIL_IF_MACRO_MUTEX(io == NULL, NULL, stateLock, 0);
} /* if */
865
866
867
ext = find_filename_extension(d);
if (ext != NULL)
868
{
869
/* Look for archivers with matching file extensions first... */
870
for (i = archivers; (*i != NULL) && (retval == NULL); i++)
871
{
872
if (__PHYSFS_stricmpASCII(ext, (*i)->info->extension) == 0)
873
retval = tryOpenDir(io, *i, d, forWriting);
874
875
876
} /* for */
/* failing an exact file extension match, try all the others... */
877
for (i = archivers; (*i != NULL) && (retval == NULL); i++)
878
{
879
if (__PHYSFS_stricmpASCII(ext, (*i)->info->extension) != 0)
880
retval = tryOpenDir(io, *i, d, forWriting);
881
882
883
884
885
} /* for */
} /* if */
else /* no extension? Try them all. */
{
886
for (i = archivers; (*i != NULL) && (retval == NULL); i++)
887
retval = tryOpenDir(io, *i, d, forWriting);
888
} /* else */
889
890
BAIL_IF_MACRO(retval == NULL, ERR_UNSUPPORTED_ARCHIVE, NULL);
891
return retval;
892
893
894
} /* openDirectory */
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
/*
* Make a platform-independent path string sane. Doesn't actually check the
* file hierarchy, it just cleans up the string.
* (dst) must be a buffer at least as big as (src), as this is where the
* cleaned up string is deposited.
* If there are illegal bits in the path (".." entries, etc) then we
* return zero and (dst) is undefined. Non-zero if the path was sanitized.
*/
static int sanitizePlatformIndependentPath(const char *src, char *dst)
{
char *prev;
char ch;
while (*src == '/') /* skip initial '/' chars... */
src++;
prev = dst;
do
{
ch = *(src++);
if ((ch == ':') || (ch == '\\')) /* illegal chars in a physfs path. */
BAIL_MACRO(ERR_INSECURE_FNAME, 0);
if (ch == '/') /* path separator. */
{
*dst = '\0'; /* "." and ".." are illegal pathnames. */
if ((strcmp(prev, ".") == 0) || (strcmp(prev, "..") == 0))
BAIL_MACRO(ERR_INSECURE_FNAME, 0);
while (*src == '/') /* chop out doubles... */
src++;
if (*src == '\0') /* ends with a pathsep? */
break; /* we're done, don't add final pathsep to dst. */
prev = dst + 1;
} /* if */
*(dst++) = ch;
} while (ch != '\0');
937
return 1;
938
939
940
} /* sanitizePlatformIndependentPath */
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
/*
* Figure out if (fname) is part of (h)'s mountpoint. (fname) must be an
* output from sanitizePlatformIndependentPath(), so that it is in a known
* state.
*
* This only finds legitimate segments of a mountpoint. If the mountpoint is
* "/a/b/c" and (fname) is "/a/b/c", "/", or "/a/b/c/d", then the results are
* all zero. "/a/b" will succeed, though.
*/
static int partOfMountPoint(DirHandle *h, char *fname)
{
/* !!! FIXME: This code feels gross. */
int rc;
size_t len, mntpntlen;
if (h->mountPoint == NULL)
957
return 0;
958
else if (*fname == '\0')
959
return 1;
960
961
962
963
len = strlen(fname);
mntpntlen = strlen(h->mountPoint);
if (len > mntpntlen) /* can't be a subset of mountpoint. */
964
return 0;
965
966
967
/* if true, must be not a match or a complete match, but not a subset. */
if ((len + 1) == mntpntlen)
968
return 0;
969
970
971
rc = strncmp(fname, h->mountPoint, len); /* !!! FIXME: case insensitive? */
if (rc != 0)
972
return 0; /* not a match. */
973
974
/* make sure /a/b matches /a/b/ and not /a/bc ... */
975
return h->mountPoint[len] == '/';
976
977
978
} /* partOfMountPoint */
979
980
static DirHandle *createDirHandle(PHYSFS_Io *io, const char *newDir,
const char *mountPoint, int forWriting)
981
982
{
DirHandle *dirHandle = NULL;
983
char *tmpmntpnt = NULL;
984
985
986
if (mountPoint != NULL)
{
987
988
989
990
const size_t len = strlen(mountPoint) + 1;
tmpmntpnt = (char *) __PHYSFS_smallAlloc(len);
GOTO_IF_MACRO(!tmpmntpnt, ERR_OUT_OF_MEMORY, badDirHandle);
if (!sanitizePlatformIndependentPath(mountPoint, tmpmntpnt))
991
goto badDirHandle;
992
mountPoint = tmpmntpnt; /* sanitized version. */
993
} /* if */
994
995
dirHandle = openDirectory(io, newDir, forWriting);
996
GOTO_IF_MACRO(!dirHandle, NULL, badDirHandle);
997
998
999
1000
if (newDir == NULL)
dirHandle->dirName = NULL;
else