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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. */
allocator.Free(info);
allocator.Free(io);
if (destruct != NULL)
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destruct(buf);
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} /* 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));
611
ecd.list = (char **) allocator.Malloc(sizeof (char *));
612
613
614
615
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;
616
return ecd.list;
617
618
619
} /* doEnumStringList */
620
static void __PHYSFS_bubble_sort(void *a, PHYSFS_uint32 lo, PHYSFS_uint32 hi,
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
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 */
642
static void __PHYSFS_quick_sort(void *a, PHYSFS_uint32 lo, PHYSFS_uint32 hi,
643
644
645
646
647
648
649
int (*cmpfn)(void *, PHYSFS_uint32, PHYSFS_uint32),
void (*swapfn)(void *, PHYSFS_uint32, PHYSFS_uint32))
{
PHYSFS_uint32 i;
PHYSFS_uint32 j;
PHYSFS_uint32 v;
650
if ((hi - lo) <= PHYSFS_QUICKSORT_THRESHOLD)
651
652
__PHYSFS_bubble_sort(a, lo, hi, cmpfn, swapfn);
else
653
654
{
i = (hi + lo) / 2;
655
656
if (cmpfn(a, lo, i) > 0) swapfn(a, lo, i);
657
658
659
660
661
662
663
664
665
666
667
668
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)
669
break;
670
671
swapfn(a, i, j);
} /* while */
672
673
if (i != (hi-1))
swapfn(a, i, hi-1);
674
675
676
__PHYSFS_quick_sort(a, lo, j, cmpfn, swapfn);
__PHYSFS_quick_sort(a, i+1, hi, cmpfn, swapfn);
} /* else */
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
} /* __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 */
692
693
694
static ErrMsg *findErrorForCurrentThread(void)
{
ErrMsg *i;
695
void *tid;
696
697
if (errorLock != NULL)
698
699
__PHYSFS_platformGrabMutex(errorLock);
700
701
if (errorMessages != NULL)
{
702
tid = __PHYSFS_platformGetThreadID();
703
704
705
706
for (i = errorMessages; i != NULL; i = i->next)
{
if (i->tid == tid)
707
{
708
709
if (errorLock != NULL)
__PHYSFS_platformReleaseMutex(errorLock);
710
return i;
711
} /* if */
712
713
} /* for */
} /* if */
714
715
if (errorLock != NULL)
716
__PHYSFS_platformReleaseMutex(errorLock);
717
718
return NULL; /* no error available. */
719
720
721
} /* findErrorForCurrentThread */
722
void __PHYSFS_setError(const char *str)
723
{
724
725
726
727
728
729
ErrMsg *err;
if (str == NULL)
return;
err = findErrorForCurrentThread();
730
731
732
if (err == NULL)
{
733
err = (ErrMsg *) allocator.Malloc(sizeof (ErrMsg));
734
735
736
if (err == NULL)
return; /* uhh...? */
737
memset((void *) err, '\0', sizeof (ErrMsg));
738
err->tid = __PHYSFS_platformGetThreadID();
739
740
741
742
if (errorLock != NULL)
__PHYSFS_platformGrabMutex(errorLock);
743
744
err->next = errorMessages;
errorMessages = err;
745
746
747
if (errorLock != NULL)
__PHYSFS_platformReleaseMutex(errorLock);
748
749
750
751
752
} /* if */
err->errorAvailable = 1;
strncpy(err->errorString, str, sizeof (err->errorString));
err->errorString[sizeof (err->errorString) - 1] = '\0';
753
} /* __PHYSFS_setError */
754
755
756
757
758
759
760
const char *PHYSFS_getLastError(void)
{
ErrMsg *err = findErrorForCurrentThread();
if ((err == NULL) || (!err->errorAvailable))
761
return NULL;
762
763
err->errorAvailable = 0;
764
return err->errorString;
765
766
767
768
} /* PHYSFS_getLastError */
/* MAKE SURE that errorLock is held before calling this! */
769
770
771
772
773
774
775
static void freeErrorMessages(void)
{
ErrMsg *i;
ErrMsg *next;
for (i = errorMessages; i != NULL; i = next)
{
776
next = i->next;
777
allocator.Free(i);
778
} /* for */
779
780
errorMessages = NULL;
781
782
783
} /* freeErrorMessages */
784
785
786
787
788
789
790
791
792
793
794
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 */
795
796
static const char *find_filename_extension(const char *fname)
{
797
798
const char *retval = NULL;
if (fname != NULL)
799
{
800
801
const char *p = strchr(fname, '.');
retval = p;
802
803
804
805
806
807
808
809
810
811
812
while (p != NULL)
{
p = strchr(p + 1, '.');
if (p != NULL)
retval = p;
} /* while */
if (retval != NULL)
retval++; /* skip '.' */
} /* if */
813
814
return retval;
815
816
817
} /* find_filename_extension */
818
static DirHandle *tryOpenDir(PHYSFS_Io *io, const PHYSFS_Archiver *funcs,
819
const char *d, int forWriting)
820
821
{
DirHandle *retval = NULL;
822
823
824
825
826
827
void *opaque = NULL;
if (io != NULL)
BAIL_IF_MACRO(!io->seek(io, 0), NULL, NULL);
opaque = funcs->openArchive(io, d, forWriting);
828
if (opaque != NULL)
829
{
830
831
832
833
retval = (DirHandle *) allocator.Malloc(sizeof (DirHandle));
if (retval == NULL)
funcs->dirClose(opaque);
else
834
{
835
836
837
838
839
memset(retval, '\0', sizeof (DirHandle));
retval->mountPoint = NULL;
retval->funcs = funcs;
retval->opaque = opaque;
} /* else */
840
841
} /* if */
842
return retval;
843
844
845
} /* tryOpenDir */
846
static DirHandle *openDirectory(PHYSFS_Io *io, const char *d, int forWriting)
847
{
848
DirHandle *retval = NULL;
849
const PHYSFS_Archiver **i;
850
const char *ext;
851
852
assert((io != NULL) || (d != NULL));
853
854
855
856
857
858
859
860
861
862
863
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 */
864
865
866
ext = find_filename_extension(d);
if (ext != NULL)
867
{
868
/* Look for archivers with matching file extensions first... */
869
for (i = archivers; (*i != NULL) && (retval == NULL); i++)
870
{
871
if (__PHYSFS_stricmpASCII(ext, (*i)->info->extension) == 0)
872
retval = tryOpenDir(io, *i, d, forWriting);
873
874
875
} /* for */
/* failing an exact file extension match, try all the others... */
876
for (i = archivers; (*i != NULL) && (retval == NULL); i++)
877
{
878
if (__PHYSFS_stricmpASCII(ext, (*i)->info->extension) != 0)
879
retval = tryOpenDir(io, *i, d, forWriting);
880
881
882
883
884
} /* for */
} /* if */
else /* no extension? Try them all. */
{
885
for (i = archivers; (*i != NULL) && (retval == NULL); i++)
886
retval = tryOpenDir(io, *i, d, forWriting);
887
} /* else */
888
889
BAIL_IF_MACRO(retval == NULL, ERR_UNSUPPORTED_ARCHIVE, NULL);
890
return retval;
891
892
893
} /* openDirectory */
894
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
/*
* 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');
936
return 1;
937
938
939
} /* sanitizePlatformIndependentPath */
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
/*
* 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)
956
return 0;
957
else if (*fname == '\0')
958
return 1;
959
960
961
962
len = strlen(fname);
mntpntlen = strlen(h->mountPoint);
if (len > mntpntlen) /* can't be a subset of mountpoint. */
963
return 0;
964
965
966
/* if true, must be not a match or a complete match, but not a subset. */
if ((len + 1) == mntpntlen)
967
return 0;
968
969
970
rc = strncmp(fname, h->mountPoint, len); /* !!! FIXME: case insensitive? */
if (rc != 0)
971
return 0; /* not a match. */
972
973
/* make sure /a/b matches /a/b/ and not /a/bc ... */
974
return h->mountPoint[len] == '/';
975
976
977
} /* partOfMountPoint */
978
979
static DirHandle *createDirHandle(PHYSFS_Io *io, const char *newDir,
const char *mountPoint, int forWriting)
980
981
{
DirHandle *dirHandle = NULL;
982
char *tmpmntpnt = NULL;
983
984
985
if (mountPoint != NULL)
{
986
987
988
989
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))
990
goto badDirHandle;
991
mountPoint = tmpmntpnt; /* sanitized version. */
992
} /* if */
993
994
dirHandle = openDirectory(io, newDir, forWriting);
995
GOTO_IF_MACRO(!dirHandle, NULL, badDirHandle);
996
997
998
999
1000
if (newDir == NULL)
dirHandle->dirName = NULL;
else
{