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physfs/src/physfs.c

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/**
* PhysicsFS; a portable, flexible file i/o abstraction.
*
* Documentation is in physfs.h. It's verbose, honest. :)
*
* Please see the file LICENSE.txt in the source's root directory.
*
* This file written by Ryan C. Gordon.
*/
/* !!! FIXME: ERR_PAST_EOF shouldn't trigger for reads. Just return zero. */
#define __PHYSICSFS_INTERNAL__
#include "physfs_internal.h"
#if defined(_MSC_VER)
#include <stdarg.h>
/* this code came from https://stackoverflow.com/a/8712996 */
int __PHYSFS_msvc_vsnprintf(char *outBuf, size_t size, const char *format, va_list ap)
{
int count = -1;
if (size != 0)
count = _vsnprintf_s(outBuf, size, _TRUNCATE, format, ap);
if (count == -1)
count = _vscprintf(format, ap);
return count;
}
int __PHYSFS_msvc_snprintf(char *outBuf, size_t size, const char *format, ...)
{
int count;
va_list ap;
va_start(ap, format);
count = __PHYSFS_msvc_vsnprintf(outBuf, size, format, ap);
va_end(ap);
return count;
}
#endif
typedef struct __PHYSFS_DIRHANDLE__
{
void *opaque; /* Instance data unique to the archiver. */
char *dirName; /* Path to archive in platform-dependent notation. */
char *mountPoint; /* Mountpoint in virtual file tree. */
const PHYSFS_Archiver *funcs; /* Ptr to archiver info for this handle. */
struct __PHYSFS_DIRHANDLE__ *next; /* linked list stuff. */
} DirHandle;
typedef struct __PHYSFS_FILEHANDLE__
{
PHYSFS_Io *io; /* Instance data unique to the archiver for this file. */
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;
typedef struct __PHYSFS_ERRSTATETYPE__
{
void *tid;
PHYSFS_ErrorCode code;
struct __PHYSFS_ERRSTATETYPE__ *next;
} ErrState;
/* General PhysicsFS state ... */
static int initialized = 0;
static ErrState *errorStates = NULL;
static DirHandle *searchPath = NULL;
static DirHandle *writeDir = NULL;
static FileHandle *openWriteList = NULL;
static FileHandle *openReadList = NULL;
static char *baseDir = NULL;
static char *userDir = NULL;
static char *prefDir = NULL;
static int allowSymLinks = 0;
static PHYSFS_Archiver **archivers = NULL;
static PHYSFS_ArchiveInfo **archiveInfo = NULL;
static volatile size_t numArchivers = 0;
/* mutexes ... */
static void *errorLock = NULL; /* protects error message list. */
static void *stateLock = NULL; /* protects other PhysFS static state. */
/* allocator ... */
static int externalAllocator = 0;
PHYSFS_Allocator allocator;
/* 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 =
{
CURRENT_PHYSFS_IO_API_VERSION, NULL,
nativeIo_read,
nativeIo_write,
nativeIo_seek,
nativeIo_tell,
nativeIo_length,
nativeIo_duplicate,
nativeIo_flush,
nativeIo_destroy
};
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(!io, PHYSFS_ERR_OUT_OF_MEMORY, createNativeIo_failed);
info = (NativeIoInfo *) allocator.Malloc(sizeof (NativeIoInfo));
GOTO_IF(!info, PHYSFS_ERR_OUT_OF_MEMORY, createNativeIo_failed);
pathdup = (char *) allocator.Malloc(strlen(path) + 1);
GOTO_IF(!pathdup, PHYSFS_ERR_OUT_OF_MEMORY, createNativeIo_failed);
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_ERRPASS(!handle, 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 */
/* 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, (size_t) len);
info->pos += len;
return len;
} /* memoryIo_read */
static PHYSFS_sint64 memoryIo_write(PHYSFS_Io *io, const void *buffer,
PHYSFS_uint64 len)
{
BAIL(PHYSFS_ERR_OPEN_FOR_READING, -1);
} /* memoryIo_write */
static int memoryIo_seek(PHYSFS_Io *io, PHYSFS_uint64 offset)
{
MemoryIoInfo *info = (MemoryIoInfo *) io->opaque;
BAIL_IF(offset > info->len, PHYSFS_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(!retval, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
newinfo = (MemoryIoInfo *) allocator.Malloc(sizeof (MemoryIoInfo));
if (!newinfo)
{
allocator.Free(retval);
BAIL(PHYSFS_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)
destruct(buf);
} /* if */
} /* memoryIo_destroy */
static const PHYSFS_Io __PHYSFS_memoryIoInterface =
{
CURRENT_PHYSFS_IO_API_VERSION, NULL,
memoryIo_read,
memoryIo_write,
memoryIo_seek,
memoryIo_tell,
memoryIo_length,
memoryIo_duplicate,
memoryIo_flush,
memoryIo_destroy
};
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(!io, PHYSFS_ERR_OUT_OF_MEMORY, createMemoryIo_failed);
info = (MemoryIoInfo *) allocator.Malloc(sizeof (MemoryIoInfo));
GOTO_IF(!info, PHYSFS_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 */
/* 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(!newfh, PHYSFS_ERR_OUT_OF_MEMORY, handleIo_dupe_failed);
memset(newfh, '\0', sizeof (*newfh));
retval = (PHYSFS_Io *) allocator.Malloc(sizeof (PHYSFS_Io));
GOTO_IF(!retval, PHYSFS_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);
if (!newfh->buffer)
GOTO(PHYSFS_ERR_OUT_OF_MEMORY, handleIo_dupe_failed);
newfh->bufsize = origfh->bufsize;
} /* if */
#endif
newfh->io = origfh->io->duplicate(origfh->io);
GOTO_IF_ERRPASS(!newfh->io, 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 =
{
CURRENT_PHYSFS_IO_API_VERSION, NULL,
handleIo_read,
handleIo_write,
handleIo_seek,
handleIo_tell,
handleIo_length,
handleIo_duplicate,
handleIo_flush,
handleIo_destroy
};
static PHYSFS_Io *__PHYSFS_createHandleIo(PHYSFS_File *f)
{
PHYSFS_Io *io = (PHYSFS_Io *) allocator.Malloc(sizeof (PHYSFS_Io));
BAIL_IF(!io, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
memcpy(io, &__PHYSFS_handleIoInterface, sizeof (*io));
io->opaque = f;
return io;
} /* __PHYSFS_createHandleIo */
/* functions ... */
typedef struct
{
char **list;
PHYSFS_uint32 size;
PHYSFS_ErrorCode errcode;
} EnumStringListCallbackData;
static void enumStringListCallback(void *data, const char *str)
{
void *ptr;
char *newstr;
EnumStringListCallbackData *pecd = (EnumStringListCallbackData *) data;
if (pecd->errcode)
return;
ptr = allocator.Realloc(pecd->list, (pecd->size + 2) * sizeof (char *));
newstr = (char *) allocator.Malloc(strlen(str) + 1);
if (ptr != NULL)
pecd->list = (char **) ptr;
if ((ptr == NULL) || (newstr == NULL))
{
pecd->errcode = PHYSFS_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));
ecd.list = (char **) allocator.Malloc(sizeof (char *));
BAIL_IF(!ecd.list, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
func(enumStringListCallback, &ecd);
if (ecd.errcode)
{
PHYSFS_setErrorCode(ecd.errcode);
return NULL;
} /* if */
ecd.list[ecd.size] = NULL;
return ecd.list;
} /* doEnumStringList */
static void __PHYSFS_bubble_sort(void *a, size_t lo, size_t hi,
int (*cmpfn)(void *, size_t, size_t),
void (*swapfn)(void *, size_t, size_t))
{
size_t 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 */
static void __PHYSFS_quick_sort(void *a, size_t lo, size_t hi,
int (*cmpfn)(void *, size_t, size_t),
void (*swapfn)(void *, size_t, size_t))
{
size_t i;
size_t j;
size_t v;
if ((hi - lo) <= PHYSFS_QUICKSORT_THRESHOLD)
__PHYSFS_bubble_sort(a, lo, hi, cmpfn, swapfn);
else
{
i = (hi + lo) / 2;
if (cmpfn(a, lo, i) > 0) swapfn(a, lo, i);
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)
break;
swapfn(a, i, j);
} /* while */
if (i != (hi-1))
swapfn(a, i, hi-1);
__PHYSFS_quick_sort(a, lo, j, cmpfn, swapfn);
__PHYSFS_quick_sort(a, i+1, hi, cmpfn, swapfn);
} /* else */
} /* __PHYSFS_quick_sort */
void __PHYSFS_sort(void *entries, size_t max,
int (*cmpfn)(void *, size_t, size_t),
void (*swapfn)(void *, size_t, size_t))
{
/*
* Quicksort w/ Bubblesort fallback algorithm inspired by code from here:
* https://www.cs.ubc.ca/spider/harrison/Java/sorting-demo.html
*/
if (max > 0)
__PHYSFS_quick_sort(entries, 0, max - 1, cmpfn, swapfn);
} /* __PHYSFS_sort */
static ErrState *findErrorForCurrentThread(void)
{
ErrState *i;
void *tid;
if (errorLock != NULL)
__PHYSFS_platformGrabMutex(errorLock);
if (errorStates != NULL)
{
tid = __PHYSFS_platformGetThreadID();
for (i = errorStates; i != NULL; i = i->next)
{
if (i->tid == tid)
{
if (errorLock != NULL)
__PHYSFS_platformReleaseMutex(errorLock);
return i;
} /* if */
} /* for */
} /* if */
if (errorLock != NULL)
__PHYSFS_platformReleaseMutex(errorLock);
return NULL; /* no error available. */
} /* findErrorForCurrentThread */
/* this doesn't reset the error state. */
static inline PHYSFS_ErrorCode currentErrorCode(void)
{
const ErrState *err = findErrorForCurrentThread();
return err ? err->code : PHYSFS_ERR_OK;
} /* currentErrorCode */
PHYSFS_ErrorCode PHYSFS_getLastErrorCode(void)
{
ErrState *err = findErrorForCurrentThread();
const PHYSFS_ErrorCode retval = (err) ? err->code : PHYSFS_ERR_OK;
if (err)
err->code = PHYSFS_ERR_OK;
return retval;
} /* PHYSFS_getLastErrorCode */
PHYSFS_DECL const char *PHYSFS_getErrorByCode(PHYSFS_ErrorCode code)
{
switch (code)
{
case PHYSFS_ERR_OK: return "no error";
case PHYSFS_ERR_OTHER_ERROR: return "unknown error";
case PHYSFS_ERR_OUT_OF_MEMORY: return "out of memory";
case PHYSFS_ERR_NOT_INITIALIZED: return "not initialized";
case PHYSFS_ERR_IS_INITIALIZED: return "already initialized";
case PHYSFS_ERR_ARGV0_IS_NULL: return "argv[0] is NULL";
case PHYSFS_ERR_UNSUPPORTED: return "unsupported";
case PHYSFS_ERR_PAST_EOF: return "past end of file";
case PHYSFS_ERR_FILES_STILL_OPEN: return "files still open";
case PHYSFS_ERR_INVALID_ARGUMENT: return "invalid argument";
case PHYSFS_ERR_NOT_MOUNTED: return "not mounted";
case PHYSFS_ERR_NOT_FOUND: return "not found";
case PHYSFS_ERR_SYMLINK_FORBIDDEN: return "symlinks are forbidden";
case PHYSFS_ERR_NO_WRITE_DIR: return "write directory is not set";
case PHYSFS_ERR_OPEN_FOR_READING: return "file open for reading";
case PHYSFS_ERR_OPEN_FOR_WRITING: return "file open for writing";
case PHYSFS_ERR_NOT_A_FILE: return "not a file";
case PHYSFS_ERR_READ_ONLY: return "read-only filesystem";
case PHYSFS_ERR_CORRUPT: return "corrupted";
case PHYSFS_ERR_SYMLINK_LOOP: return "infinite symbolic link loop";
case PHYSFS_ERR_IO: return "i/o error";
case PHYSFS_ERR_PERMISSION: return "permission denied";
case PHYSFS_ERR_NO_SPACE: return "no space available for writing";
case PHYSFS_ERR_BAD_FILENAME: return "filename is illegal or insecure";
case PHYSFS_ERR_BUSY: return "tried to modify a file the OS needs";
case PHYSFS_ERR_DIR_NOT_EMPTY: return "directory isn't empty";
case PHYSFS_ERR_OS_ERROR: return "OS reported an error";
case PHYSFS_ERR_DUPLICATE: return "duplicate resource";
case PHYSFS_ERR_BAD_PASSWORD: return "bad password";
} /* switch */
return NULL; /* don't know this error code. */
} /* PHYSFS_getErrorByCode */
void PHYSFS_setErrorCode(PHYSFS_ErrorCode errcode)
{
ErrState *err;
if (!errcode)
return;
err = findErrorForCurrentThread();
if (err == NULL)
{
err = (ErrState *) allocator.Malloc(sizeof (ErrState));
if (err == NULL)
return; /* uhh...? */
memset(err, '\0', sizeof (ErrState));
err->tid = __PHYSFS_platformGetThreadID();
if (errorLock != NULL)
__PHYSFS_platformGrabMutex(errorLock);
err->next = errorStates;
errorStates = err;
if (errorLock != NULL)
__PHYSFS_platformReleaseMutex(errorLock);
} /* if */
err->code = errcode;
} /* PHYSFS_setErrorCode */
const char *PHYSFS_getLastError(void)
{
const PHYSFS_ErrorCode err = PHYSFS_getLastErrorCode();
return (err) ? PHYSFS_getErrorByCode(err) : NULL;
} /* PHYSFS_getLastError */
/* MAKE SURE that errorLock is held before calling this! */
static void freeErrorStates(void)
{
ErrState *i;
ErrState *next;
for (i = errorStates; i != NULL; i = next)
{
next = i->next;
allocator.Free(i);
} /* for */
errorStates = NULL;
} /* freeErrorStates */
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 */
static const char *find_filename_extension(const char *fname)
{
const char *retval = NULL;
if (fname != NULL)
{
const char *p = strchr(fname, '.');
retval = p;
while (p != NULL)
{
p = strchr(p + 1, '.');
if (p != NULL)
retval = p;
} /* while */
if (retval != NULL)
retval++; /* skip '.' */
} /* if */
return retval;
} /* find_filename_extension */
static DirHandle *tryOpenDir(PHYSFS_Io *io, const PHYSFS_Archiver *funcs,
const char *d, int forWriting)
{
DirHandle *retval = NULL;
void *opaque = NULL;
if (io != NULL)
BAIL_IF_ERRPASS(!io->seek(io, 0), NULL);
opaque = funcs->openArchive(io, d, forWriting);
if (opaque != NULL)
{
retval = (DirHandle *) allocator.Malloc(sizeof (DirHandle));
if (retval == NULL)
funcs->closeArchive(opaque);
else
{
memset(retval, '\0', sizeof (DirHandle));
retval->mountPoint = NULL;
retval->funcs = funcs;
retval->opaque = opaque;
} /* else */
} /* if */
return retval;
} /* tryOpenDir */
static DirHandle *openDirectory(PHYSFS_Io *io, const char *d, int forWriting)
{
DirHandle *retval = NULL;
PHYSFS_Archiver **i;
const char *ext;
int created_io = 0;
assert((io != NULL) || (d != NULL));
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_ERRPASS(!io, 0);
created_io = 1;
} /* if */
ext = find_filename_extension(d);
if (ext != NULL)
{
/* Look for archivers with matching file extensions first... */
for (i = archivers; (*i != NULL) && (retval == NULL); i++)
{
if (__PHYSFS_utf8stricmp(ext, (*i)->info.extension) == 0)
retval = tryOpenDir(io, *i, d, forWriting);
} /* for */
/* failing an exact file extension match, try all the others... */
for (i = archivers; (*i != NULL) && (retval == NULL); i++)
{
if (__PHYSFS_utf8stricmp(ext, (*i)->info.extension) != 0)
retval = tryOpenDir(io, *i, d, forWriting);
} /* for */
} /* if */
else /* no extension? Try them all. */
{
for (i = archivers; (*i != NULL) && (retval == NULL); i++)
retval = tryOpenDir(io, *i, d, forWriting);
} /* else */
if ((!retval) && (created_io))
io->destroy(io);
BAIL_IF(!retval, PHYSFS_ERR_UNSUPPORTED, NULL);
return retval;
} /* openDirectory */
/*
* 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(PHYSFS_ERR_BAD_FILENAME, 0);
if (ch == '/') /* path separator. */
{
*dst = '\0'; /* "." and ".." are illegal pathnames. */
if ((strcmp(prev, ".") == 0) || (strcmp(prev, "..") == 0))
BAIL(PHYSFS_ERR_BAD_FILENAME, 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');
return 1;
} /* sanitizePlatformIndependentPath */
/*
* 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)
return 0;
else if (*fname == '\0')
return 1;
len = strlen(fname);
mntpntlen = strlen(h->mountPoint);
if (len > mntpntlen) /* can't be a subset of mountpoint. */
return 0;
/* if true, must be not a match or a complete match, but not a subset. */
if ((len + 1) == mntpntlen)
return 0;
rc = strncmp(fname, h->mountPoint, len); /* !!! FIXME: case insensitive? */
if (rc != 0)
return 0; /* not a match. */
/* make sure /a/b matches /a/b/ and not /a/bc ... */
return h->mountPoint[len] == '/';
} /* partOfMountPoint */
static DirHandle *createDirHandle(PHYSFS_Io *io, const char *newDir,
const char *mountPoint, int forWriting)
{
DirHandle *dirHandle = NULL;
char *tmpmntpnt = NULL;
if (mountPoint != NULL)
{
const size_t len = strlen(mountPoint) + 1;
tmpmntpnt = (char *) __PHYSFS_smallAlloc(len);
GOTO_IF(!tmpmntpnt, PHYSFS_ERR_OUT_OF_MEMORY, badDirHandle);
if (!sanitizePlatformIndependentPath(mountPoint, tmpmntpnt))
goto badDirHandle;
mountPoint = tmpmntpnt; /* sanitized version. */
} /* if */
dirHandle = openDirectory(io, newDir, forWriting);
GOTO_IF_ERRPASS(!dirHandle, badDirHandle);
if (newDir == NULL)
dirHandle->dirName = NULL;
else
{
dirHandle->dirName = (char *) allocator.Malloc(strlen(newDir) + 1);
if (!dirHandle->dirName)
GOTO(PHYSFS_ERR_OUT_OF_MEMORY, badDirHandle);
strcpy(dirHandle->dirName, newDir);
} /* else */
if ((mountPoint != NULL) && (*mountPoint != '\0'))
{
dirHandle->mountPoint = (char *)allocator.Malloc(strlen(mountPoint)+2);
if (!dirHandle->mountPoint)
GOTO(PHYSFS_ERR_OUT_OF_MEMORY, badDirHandle);
strcpy(dirHandle->mountPoint, mountPoint);
strcat(dirHandle->mountPoint, "/");
} /* if */
__PHYSFS_smallFree(tmpmntpnt);
return dirHandle;
badDirHandle:
if (dirHandle != NULL)
{
dirHandle->funcs->closeArchive(dirHandle->opaque);
allocator.Free(dirHandle->dirName);
allocator.Free(dirHandle->mountPoint);
allocator.Free(dirHandle);
} /* if */
__PHYSFS_smallFree(tmpmntpnt);
return NULL;
} /* createDirHandle */
/* MAKE SURE you've got the stateLock held before calling this! */
static int freeDirHandle(DirHandle *dh, FileHandle *openList)
{
FileHandle *i;
if (dh == NULL)
return 1;
for (i = openList; i != NULL; i = i->next)
BAIL_IF(i->dirHandle == dh, PHYSFS_ERR_FILES_STILL_OPEN, 0);
dh->funcs->closeArchive(dh->opaque);
allocator.Free(dh->dirName);
allocator.Free(dh->mountPoint);
allocator.Free(dh);
return 1;
} /* freeDirHandle */
static char *calculateBaseDir(const char *argv0)
{
const char dirsep = __PHYSFS_platformDirSeparator;
char *retval = NULL;
char *ptr = NULL;
/* Give the platform layer first shot at this. */
retval = __PHYSFS_platformCalcBaseDir(argv0);
if (retval != NULL)
return retval;
/* We need argv0 to go on. */
BAIL_IF(argv0 == NULL, PHYSFS_ERR_ARGV0_IS_NULL, NULL);
ptr = strrchr(argv0, dirsep);
if (ptr != NULL)
{
const size_t size = ((size_t) (ptr - argv0)) + 1;
retval = (char *) allocator.Malloc(size + 1);
BAIL_IF(!retval, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
memcpy(retval, argv0, size);
retval[size] = '\0';
return retval;
} /* if */
/* argv0 wasn't helpful. */
BAIL(PHYSFS_ERR_INVALID_ARGUMENT, NULL);
} /* calculateBaseDir */
static int initializeMutexes(void)
{
errorLock = __PHYSFS_platformCreateMutex();
if (errorLock == NULL)
goto initializeMutexes_failed;
stateLock = __PHYSFS_platformCreateMutex();
if (stateLock == NULL)
goto initializeMutexes_failed;
return 1; /* success. */
initializeMutexes_failed:
if (errorLock != NULL)
__PHYSFS_platformDestroyMutex(errorLock);
if (stateLock != NULL)
__PHYSFS_platformDestroyMutex(stateLock);
errorLock = stateLock = NULL;
return 0; /* failed. */
} /* initializeMutexes */
static int doRegisterArchiver(const PHYSFS_Archiver *_archiver);
static int initStaticArchivers(void)
{
#define REGISTER_STATIC_ARCHIVER(arc) { \
if (!doRegisterArchiver(&__PHYSFS_Archiver_##arc)) { \
return 0; \
} \
}
#if PHYSFS_SUPPORTS_ZIP
REGISTER_STATIC_ARCHIVER(ZIP);
#endif
#if PHYSFS_SUPPORTS_7Z
REGISTER_STATIC_ARCHIVER(LZMA);
#endif
#if PHYSFS_SUPPORTS_GRP
REGISTER_STATIC_ARCHIVER(GRP);
#endif
#if PHYSFS_SUPPORTS_QPAK
REGISTER_STATIC_ARCHIVER(QPAK);
#endif
#if PHYSFS_SUPPORTS_HOG
REGISTER_STATIC_ARCHIVER(HOG);
#endif
#if PHYSFS_SUPPORTS_MVL
REGISTER_STATIC_ARCHIVER(MVL);
#endif
#if PHYSFS_SUPPORTS_WAD
REGISTER_STATIC_ARCHIVER(WAD);
#endif
#if PHYSFS_SUPPORTS_SLB
REGISTER_STATIC_ARCHIVER(SLB);
#endif
#if PHYSFS_SUPPORTS_ISO9660
REGISTER_STATIC_ARCHIVER(ISO9660);
#endif
#if PHYSFS_SUPPORTS_VDF
REGISTER_STATIC_ARCHIVER(VDF)
#endif
#undef REGISTER_STATIC_ARCHIVER
return 1;
} /* initStaticArchivers */
static void setDefaultAllocator(void);
static int doDeinit(void);
int PHYSFS_init(const char *argv0)
{
BAIL_IF(initialized, PHYSFS_ERR_IS_INITIALIZED, 0);
if (!externalAllocator)
setDefaultAllocator();
if ((allocator.Init != NULL) && (!allocator.Init())) return 0;
if (!__PHYSFS_platformInit())
{
if (allocator.Deinit != NULL) allocator.Deinit();
return 0;
} /* if */
/* everything below here can be cleaned up safely by doDeinit(). */
if (!initializeMutexes()) goto initFailed;
baseDir = calculateBaseDir(argv0);
if (!baseDir) goto initFailed;
userDir = __PHYSFS_platformCalcUserDir();
if (!userDir) goto initFailed;
/* Platform layer is required to append a dirsep. */
assert(baseDir[strlen(baseDir) - 1] == __PHYSFS_platformDirSeparator);
assert(userDir[strlen(userDir) - 1] == __PHYSFS_platformDirSeparator);
if (!initStaticArchivers()) goto initFailed;
initialized = 1;
/* This makes sure that the error subsystem is initialized. */
PHYSFS_setErrorCode(PHYSFS_getLastErrorCode());
return 1;
initFailed:
doDeinit();
return 0;
} /* PHYSFS_init */
/* MAKE SURE you hold stateLock before calling this! */
static int closeFileHandleList(FileHandle **list)
{
FileHandle *i;
FileHandle *next = NULL;
for (i = *list; i != NULL; i = next)
{
PHYSFS_Io *io = i->io;
next = i->next;
if (io->flush && !io->flush(io))
{
*list = i;
return 0;
} /* if */
io->destroy(io);
allocator.Free(i);
} /* for */
*list = NULL;
return 1;
} /* closeFileHandleList */
/* MAKE SURE you hold the stateLock before calling this! */
static void freeSearchPath(void)
{
DirHandle *i;
DirHandle *next = NULL;
closeFileHandleList(&openReadList);
if (searchPath != NULL)
{
for (i = searchPath; i != NULL; i = next)
{
next = i->next;
freeDirHandle(i, openReadList);
} /* for */
searchPath = NULL;
} /* if */
} /* freeSearchPath */
/* MAKE SURE you hold stateLock before calling this! */
static int archiverInUse(const PHYSFS_Archiver *arc, const DirHandle *list)
{
const DirHandle *i;
for (i = list; i != NULL; i = i->next)
{
if (i->funcs == arc)
return 1;
} /* for */
return 0; /* not in use */
} /* archiverInUse */
/* MAKE SURE you hold stateLock before calling this! */
static int doDeregisterArchiver(const size_t idx)
{
const size_t len = (numArchivers - idx) * sizeof (void *);
PHYSFS_ArchiveInfo *info = archiveInfo[idx];
PHYSFS_Archiver *arc = archivers[idx];
/* make sure nothing is still using this archiver */
if (archiverInUse(arc, searchPath) || archiverInUse(arc, writeDir))
BAIL(PHYSFS_ERR_FILES_STILL_OPEN, 0);
allocator.Free((void *) info->extension);
allocator.Free((void *) info->description);
allocator.Free((void *) info->author);
allocator.Free((void *) info->url);
allocator.Free((void *) arc);
memmove(&archiveInfo[idx], &archiveInfo[idx+1], len);
memmove(&archivers[idx], &archivers[idx+1], len);
assert(numArchivers > 0);
numArchivers--;
return 1;
} /* doDeregisterArchiver */
/* Does NOT hold the state lock; we're shutting down. */
static void freeArchivers(void)
{
while (numArchivers > 0)
{
if (!doDeregisterArchiver(numArchivers - 1))
assert(!"nothing should be mounted during shutdown.");
} /* while */
allocator.Free(archivers);
allocator.Free(archiveInfo);
archivers = NULL;
archiveInfo = NULL;
} /* freeArchivers */
static int doDeinit(void)
{
closeFileHandleList(&openWriteList);
BAIL_IF(!PHYSFS_setWriteDir(NULL), PHYSFS_ERR_FILES_STILL_OPEN, 0);
freeSearchPath();
freeArchivers();
freeErrorStates();
if (baseDir != NULL)
{
allocator.Free(baseDir);
baseDir = NULL;
} /* if */
if (userDir != NULL)
{
allocator.Free(userDir);
userDir = NULL;
} /* if */
if (prefDir != NULL)
{
allocator.Free(prefDir);
prefDir = NULL;
} /* if */
if (archiveInfo != NULL)
{
allocator.Free(archiveInfo);
archiveInfo = NULL;
} /* if */
if (archivers != NULL)
{
allocator.Free(archivers);
archivers = NULL;
} /* if */
allowSymLinks = 0;
initialized = 0;
if (errorLock) __PHYSFS_platformDestroyMutex(errorLock);
if (stateLock) __PHYSFS_platformDestroyMutex(stateLock);
if (allocator.Deinit != NULL)
allocator.Deinit();
errorLock = stateLock = NULL;
/* !!! FIXME: what on earth are you supposed to do if this fails? */
BAIL_IF_ERRPASS(!__PHYSFS_platformDeinit(), 0);
return 1;
} /* doDeinit */
int PHYSFS_deinit(void)
{
BAIL_IF(!initialized, PHYSFS_ERR_NOT_INITIALIZED, 0);
return doDeinit();
} /* PHYSFS_deinit */
int PHYSFS_isInit(void)
{
return initialized;
} /* PHYSFS_isInit */
char *__PHYSFS_strdup(const char *str)
{
char *retval = (char *) allocator.Malloc(strlen(str) + 1);
if (retval)
strcpy(retval, str);
return retval;
} /* __PHYSFS_strdup */
PHYSFS_uint32 __PHYSFS_hashString(const char *str, size_t len)
{
PHYSFS_uint32 hash = 5381;
while (len--)
hash = ((hash << 5) + hash) ^ *(str++);
return hash;
} /* __PHYSFS_hashString */
/* MAKE SURE you hold stateLock before calling this! */
static int doRegisterArchiver(const PHYSFS_Archiver *_archiver)
{
const PHYSFS_uint32 maxver = CURRENT_PHYSFS_ARCHIVER_API_VERSION;
const size_t len = (numArchivers + 2) * sizeof (void *);
PHYSFS_Archiver *archiver = NULL;
PHYSFS_ArchiveInfo *info = NULL;
const char *ext = NULL;
void *ptr = NULL;
size_t i;
BAIL_IF(!_archiver, PHYSFS_ERR_INVALID_ARGUMENT, 0);
BAIL_IF(_archiver->version > maxver, PHYSFS_ERR_UNSUPPORTED, 0);
BAIL_IF(!_archiver->info.extension, PHYSFS_ERR_INVALID_ARGUMENT, 0);
BAIL_IF(!_archiver->info.description, PHYSFS_ERR_INVALID_ARGUMENT, 0);
BAIL_IF(!_archiver->info.author, PHYSFS_ERR_INVALID_ARGUMENT, 0);
BAIL_IF(!_archiver->info.url, PHYSFS_ERR_INVALID_ARGUMENT, 0);
BAIL_IF(!_archiver->openArchive, PHYSFS_ERR_INVALID_ARGUMENT, 0);
BAIL_IF(!_archiver->enumerateFiles, PHYSFS_ERR_INVALID_ARGUMENT, 0);
BAIL_IF(!_archiver->openRead, PHYSFS_ERR_INVALID_ARGUMENT, 0);
BAIL_IF(!_archiver->openWrite, PHYSFS_ERR_INVALID_ARGUMENT, 0);
BAIL_IF(!_archiver->openAppend, PHYSFS_ERR_INVALID_ARGUMENT, 0);
BAIL_IF(!_archiver->remove, PHYSFS_ERR_INVALID_ARGUMENT, 0);
BAIL_IF(!_archiver->mkdir, PHYSFS_ERR_INVALID_ARGUMENT, 0);
BAIL_IF(!_archiver->closeArchive, PHYSFS_ERR_INVALID_ARGUMENT, 0);
BAIL_IF(!_archiver->stat, PHYSFS_ERR_INVALID_ARGUMENT, 0);
ext = _archiver->info.extension;
for (i = 0; i < numArchivers; i++)
{
if (__PHYSFS_utf8stricmp(archiveInfo[i]->extension, ext) == 0)
BAIL(PHYSFS_ERR_DUPLICATE, 0); /* !!! FIXME: better error? ERR_IN_USE? */
} /* for */
/* make a copy of the data. */
archiver = (PHYSFS_Archiver *) allocator.Malloc(sizeof (*archiver));
GOTO_IF(!archiver, PHYSFS_ERR_OUT_OF_MEMORY, regfailed);
/* Must copy sizeof (OLD_VERSION_OF_STRUCT) when version changes! */
memcpy(archiver, _archiver, sizeof (*archiver));
info = (PHYSFS_ArchiveInfo *) &archiver->info;
memset(info, '\0', sizeof (*info)); /* NULL in case an alloc fails. */
#define CPYSTR(item) \
info->item = __PHYSFS_strdup(_archiver->info.item); \
GOTO_IF(!info->item, PHYSFS_ERR_OUT_OF_MEMORY, regfailed);
CPYSTR(extension);
CPYSTR(description);
CPYSTR(author);
CPYSTR(url);
info->supportsSymlinks = _archiver->info.supportsSymlinks;
#undef CPYSTR
ptr = allocator.Realloc(archiveInfo, len);
GOTO_IF(!ptr, PHYSFS_ERR_OUT_OF_MEMORY, regfailed);
archiveInfo = (PHYSFS_ArchiveInfo **) ptr;
ptr = allocator.Realloc(archivers, len);
GOTO_IF(!ptr, PHYSFS_ERR_OUT_OF_MEMORY, regfailed);
archivers = (PHYSFS_Archiver **) ptr;
archiveInfo[numArchivers] = info;
archiveInfo[numArchivers + 1] = NULL;
archivers[numArchivers] = archiver;
archivers[numArchivers + 1] = NULL;
numArchivers++;
return 1;
regfailed:
if (info != NULL)
{
allocator.Free((void *) info->extension);
allocator.Free((void *) info->description);
allocator.Free((void *) info->author);
allocator.Free((void *) info->url);
} /* if */
allocator.Free(archiver);
return 0;
} /* doRegisterArchiver */
int PHYSFS_registerArchiver(const PHYSFS_Archiver *archiver)
{
int retval;
BAIL_IF(!initialized, PHYSFS_ERR_NOT_INITIALIZED, 0);
__PHYSFS_platformGrabMutex(stateLock);
retval = doRegisterArchiver(archiver);
__PHYSFS_platformReleaseMutex(stateLock);
return retval;
} /* PHYSFS_registerArchiver */
int PHYSFS_deregisterArchiver(const char *ext)
{
size_t i;
BAIL_IF(!initialized, PHYSFS_ERR_NOT_INITIALIZED, 0);
BAIL_IF(!ext, PHYSFS_ERR_INVALID_ARGUMENT, 0);
__PHYSFS_platformGrabMutex(stateLock);
for (i = 0; i < numArchivers; i++)
{
if (__PHYSFS_utf8stricmp(archiveInfo[i]->extension, ext) == 0)
{
const int retval = doDeregisterArchiver(i);
__PHYSFS_platformReleaseMutex(stateLock);
return retval;
} /* if */
} /* for */
__PHYSFS_platformReleaseMutex(stateLock);
BAIL(PHYSFS_ERR_NOT_FOUND, 0);
} /* PHYSFS_deregisterArchiver */
const PHYSFS_ArchiveInfo **PHYSFS_supportedArchiveTypes(void)
{
BAIL_IF(!initialized, PHYSFS_ERR_NOT_INITIALIZED, NULL);
return (const PHYSFS_ArchiveInfo **) archiveInfo;
} /* PHYSFS_supportedArchiveTypes */
void PHYSFS_freeList(void *list)
{
void **i;
if (list != NULL)
{
for (i = (void **) list; *i != NULL; i++)
allocator.Free(*i);
allocator.Free(list);
} /* if */
} /* PHYSFS_freeList */
const char *PHYSFS_getDirSeparator(void)
{
static char retval[2] = { __PHYSFS_platformDirSeparator, '\0' };
return retval;
} /* PHYSFS_getDirSeparator */
char **PHYSFS_getCdRomDirs(void)
{
return doEnumStringList(__PHYSFS_platformDetectAvailableCDs);
} /* PHYSFS_getCdRomDirs */
void PHYSFS_getCdRomDirsCallback(PHYSFS_StringCallback callback, void *data)
{
__PHYSFS_platformDetectAvailableCDs(callback, data);
} /* PHYSFS_getCdRomDirsCallback */
const char *PHYSFS_getPrefDir(const char *org, const char *app)
{
const char dirsep = __PHYSFS_platformDirSeparator;
PHYSFS_Stat statbuf;
char *ptr = NULL;
char *endstr = NULL;
BAIL_IF(!initialized, PHYSFS_ERR_NOT_INITIALIZED, 0);
BAIL_IF(!org, PHYSFS_ERR_INVALID_ARGUMENT, NULL);
BAIL_IF(*org == '\0', PHYSFS_ERR_INVALID_ARGUMENT, NULL);
BAIL_IF(!app, PHYSFS_ERR_INVALID_ARGUMENT, NULL);
BAIL_IF(*app == '\0', PHYSFS_ERR_INVALID_ARGUMENT, NULL);
allocator.Free(prefDir);
prefDir = __PHYSFS_platformCalcPrefDir(org, app);
BAIL_IF_ERRPASS(!prefDir, NULL);
assert(strlen(prefDir) > 0);
endstr = prefDir + (strlen(prefDir) - 1);
assert(*endstr == dirsep);
*endstr = '\0'; /* mask out the final dirsep for now. */
if (!__PHYSFS_platformStat(prefDir, &statbuf))
{
for (ptr = strchr(prefDir, dirsep); ptr; ptr = strchr(ptr+1, dirsep))
{
*ptr = '\0';
__PHYSFS_platformMkDir(prefDir);
*ptr = dirsep;
} /* for */
if (!__PHYSFS_platformMkDir(prefDir))
{
allocator.Free(prefDir);
prefDir = NULL;
} /* if */
} /* if */
*endstr = dirsep; /* readd the final dirsep. */
return prefDir;
} /* PHYSFS_getPrefDir */
const char *PHYSFS_getBaseDir(void)
{
return baseDir; /* this is calculated in PHYSFS_init()... */
} /* PHYSFS_getBaseDir */
const char *__PHYSFS_getUserDir(void) /* not deprecated internal version. */
{
return userDir; /* this is calculated in PHYSFS_init()... */
} /* __PHYSFS_getUserDir */
const char *PHYSFS_getUserDir(void)
{
return __PHYSFS_getUserDir();
} /* PHYSFS_getUserDir */
const char *PHYSFS_getWriteDir(void)
{
const char *retval = NULL;
__PHYSFS_platformGrabMutex(stateLock);
if (writeDir != NULL)
retval = writeDir->dirName;
__PHYSFS_platformReleaseMutex(stateLock);
return retval;
} /* PHYSFS_getWriteDir */
int PHYSFS_setWriteDir(const char *newDir)
{
int retval = 1;
__PHYSFS_platformGrabMutex(stateLock);
if (writeDir != NULL)
{
BAIL_IF_MUTEX_ERRPASS(!freeDirHandle(writeDir, openWriteList),
stateLock, 0);
writeDir = NULL;
} /* if */
if (newDir != NULL)
{
/* !!! FIXME: PHYSFS_Io shouldn't be NULL */
writeDir = createDirHandle(NULL, newDir, NULL, 1);
retval = (writeDir != NULL);
} /* if */
__PHYSFS_platformReleaseMutex(stateLock);
return retval;
} /* PHYSFS_setWriteDir */
static int doMount(PHYSFS_Io *io, const char *fname,
const char *mountPoint, int appendToPath)
{
DirHandle *dh;
DirHandle *prev = NULL;
DirHandle *i;
if (mountPoint == NULL)
mountPoint = "/";
__PHYSFS_platformGrabMutex(stateLock);
if (fname != NULL)
{
for (i = searchPath; i != NULL; i = i->next)
{
/* already in search path? */
if ((i->dirName != NULL) && (strcmp(fname, i->dirName) == 0))
BAIL_MUTEX_ERRPASS(stateLock, 1);
prev = i;
} /* for */
} /* if */
dh = createDirHandle(io, fname, mountPoint, 0);
BAIL_IF_MUTEX_ERRPASS(!dh, stateLock, 0);
if (appendToPath)
{
if (prev == NULL)
searchPath = dh;
else
prev->next = dh;
} /* if */
else
{
dh->next = searchPath;
searchPath = dh;
} /* else */
__PHYSFS_platformReleaseMutex(stateLock);
return 1;
} /* doMount */
int PHYSFS_mountIo(PHYSFS_Io *io, const char *fname,
const char *mountPoint, int appendToPath)
{
BAIL_IF(!io, PHYSFS_ERR_INVALID_ARGUMENT, 0);
BAIL_IF(io->version != 0, PHYSFS_ERR_UNSUPPORTED, 0);
return doMount(io, fname, mountPoint, appendToPath);
} /* PHYSFS_mountIo */
int PHYSFS_mountMemory(const void *buf, PHYSFS_uint64 len, void (*del)(void *),
const char *fname, const char *mountPoint,
int appendToPath)
{
int retval = 0;
PHYSFS_Io *io = NULL;
BAIL_IF(!buf, PHYSFS_ERR_INVALID_ARGUMENT, 0);
io = __PHYSFS_createMemoryIo(buf, len, del);
BAIL_IF_ERRPASS(!io, 0);
retval = doMount(io, fname, mountPoint, appendToPath);
if (!retval)
{
/* docs say not to call (del) in case of failure, so cheat. */
MemoryIoInfo *info = (MemoryIoInfo *) io->opaque;
info->destruct = NULL;
io->destroy(io);
} /* if */
return retval;
} /* PHYSFS_mountMemory */
int PHYSFS_mountHandle(PHYSFS_File *file, const char *fname,
const char *mountPoint, int appendToPath)
{
int retval = 0;
PHYSFS_Io *io = NULL;
BAIL_IF(file == NULL, PHYSFS_ERR_INVALID_ARGUMENT, 0);
io = __PHYSFS_createHandleIo(file);
BAIL_IF_ERRPASS(!io, 0);
retval = doMount(io, fname, mountPoint, appendToPath);
if (!retval)
{
/* docs say not to destruct in case of failure, so cheat. */
io->opaque = NULL;
io->destroy(io);
} /* if */
return retval;
} /* PHYSFS_mountHandle */
int PHYSFS_mount(const char *newDir, const char *mountPoint, int appendToPath)
{
BAIL_IF(!newDir, PHYSFS_ERR_INVALID_ARGUMENT, 0);
return doMount(NULL, newDir, mountPoint, appendToPath);
} /* PHYSFS_mount */
int PHYSFS_addToSearchPath(const char *newDir, int appendToPath)
{
return doMount(NULL, newDir, NULL, appendToPath);
} /* PHYSFS_addToSearchPath */
int PHYSFS_removeFromSearchPath(const char *oldDir)
{
return PHYSFS_unmount(oldDir);
} /* PHYSFS_removeFromSearchPath */
int PHYSFS_unmount(const char *oldDir)
{
DirHandle *i;
DirHandle *prev = NULL;
DirHandle *next = NULL;
BAIL_IF(oldDir == NULL, PHYSFS_ERR_INVALID_ARGUMENT, 0);
__PHYSFS_platformGrabMutex(stateLock);
for (i = searchPath; i != NULL; i = i->next)
{
if (strcmp(i->dirName, oldDir) == 0)
{
next = i->next;
BAIL_IF_MUTEX_ERRPASS(!freeDirHandle(i, openReadList),
stateLock, 0);
if (prev == NULL)
searchPath = next;
else
prev->next = next;
BAIL_MUTEX_ERRPASS(stateLock, 1);
} /* if */
prev = i;
} /* for */
BAIL_MUTEX(PHYSFS_ERR_NOT_MOUNTED, stateLock, 0);
} /* PHYSFS_unmount */
char **PHYSFS_getSearchPath(void)
{
return doEnumStringList(PHYSFS_getSearchPathCallback);
} /* PHYSFS_getSearchPath */
const char *PHYSFS_getMountPoint(const char *dir)
{
DirHandle *i;
__PHYSFS_platformGrabMutex(stateLock);
for (i = searchPath; i != NULL; i = i->next)
{
if (strcmp(i->dirName, dir) == 0)
{
const char *retval = ((i->mountPoint) ? i->mountPoint : "/");
__PHYSFS_platformReleaseMutex(stateLock);
return retval;
} /* if */
} /* for */
__PHYSFS_platformReleaseMutex(stateLock);
BAIL(PHYSFS_ERR_NOT_MOUNTED, NULL);
} /* PHYSFS_getMountPoint */
void PHYSFS_getSearchPathCallback(PHYSFS_StringCallback callback, void *data)
{
DirHandle *i;
__PHYSFS_platformGrabMutex(stateLock);
for (i = searchPath; i != NULL; i = i->next)
callback(data, i->dirName);
__PHYSFS_platformReleaseMutex(stateLock);
} /* PHYSFS_getSearchPathCallback */
/* Split out to avoid stack allocation in a loop. */
static void setSaneCfgAddPath(const char *i, const size_t l, const char *dirsep,
int archivesFirst)
{
const char *d = PHYSFS_getRealDir(i);
const size_t allocsize = strlen(d) + strlen(dirsep) + l + 1;
char *str = (char *) __PHYSFS_smallAlloc(allocsize);
if (str != NULL)
{
snprintf(str, allocsize, "%s%s%s", d, dirsep, i);
PHYSFS_mount(str, NULL, archivesFirst == 0);
__PHYSFS_smallFree(str);
} /* if */
} /* setSaneCfgAddPath */
int PHYSFS_setSaneConfig(const char *organization, const char *appName,
const char *archiveExt, int includeCdRoms,
int archivesFirst)
{
const char *dirsep = PHYSFS_getDirSeparator();
const char *basedir;
const char *prefdir;
BAIL_IF(!initialized, PHYSFS_ERR_NOT_INITIALIZED, 0);
prefdir = PHYSFS_getPrefDir(organization, appName);
BAIL_IF_ERRPASS(!prefdir, 0);
basedir = PHYSFS_getBaseDir();
BAIL_IF_ERRPASS(!basedir, 0);
BAIL_IF(!PHYSFS_setWriteDir(prefdir), PHYSFS_ERR_NO_WRITE_DIR, 0);
/* Put write dir first in search path... */
PHYSFS_mount(prefdir, NULL, 0);
/* Put base path on search path... */
PHYSFS_mount(basedir, NULL, 1);
/* handle CD-ROMs... */
if (includeCdRoms)
{
char **cds = PHYSFS_getCdRomDirs();
char **i;
for (i = cds; *i != NULL; i++)
PHYSFS_mount(*i, NULL, 1);
PHYSFS_freeList(cds);
} /* if */
/* Root out archives, and add them to search path... */
if (archiveExt != NULL)
{
char **rc = PHYSFS_enumerateFiles("/");
char **i;
size_t extlen = strlen(archiveExt);
char *ext;
for (i = rc; *i != NULL; i++)
{
size_t l = strlen(*i);
if ((l > extlen) && ((*i)[l - extlen - 1] == '.'))
{
ext = (*i) + (l - extlen);
if (__PHYSFS_utf8stricmp(ext, archiveExt) == 0)
setSaneCfgAddPath(*i, l, dirsep, archivesFirst);
} /* if */
} /* for */
PHYSFS_freeList(rc);
} /* if */
return 1;
} /* PHYSFS_setSaneConfig */
void PHYSFS_permitSymbolicLinks(int allow)
{
allowSymLinks = allow;
} /* PHYSFS_permitSymbolicLinks */
int PHYSFS_symbolicLinksPermitted(void)
{
return allowSymLinks;
} /* PHYSFS_symbolicLinksPermitted */
/*
* Verify that (fname) (in platform-independent notation), in relation
* to (h) is secure. That means that each element of fname is checked
* for symlinks (if they aren't permitted). This also allows for quick
* rejection of files that exist outside an archive's mountpoint.
*
* With some exceptions (like PHYSFS_mkdir(), which builds multiple subdirs
* at a time), you should always pass zero for "allowMissing" for efficiency.
*
* (fname) must point to an output from sanitizePlatformIndependentPath(),
* since it will make sure that path names are in the right format for
* passing certain checks. It will also do checks for "insecure" pathnames
* like ".." which should be done once instead of once per archive. This also
* gives us license to treat (fname) as scratch space in this function.
*
* Returns non-zero if string is safe, zero if there's a security issue.
* PHYSFS_getLastError() will specify what was wrong. (*fname) will be
* updated to point past any mount point elements so it is prepared to
* be used with the archiver directly.
*/
static int verifyPath(DirHandle *h, char **_fname, int allowMissing)
{
char *fname = *_fname;
int retval = 1;
char *start;
char *end;
if (*fname == '\0') /* quick rejection. */
return 1;
/* !!! FIXME: This codeblock sucks. */
if (h->mountPoint != NULL) /* NULL mountpoint means "/". */
{
size_t mntpntlen = strlen(h->mountPoint);
size_t len = strlen(fname);
assert(mntpntlen > 1); /* root mount points should be NULL. */
/* not under the mountpoint, so skip this archive. */
BAIL_IF(len < mntpntlen-1, PHYSFS_ERR_NOT_FOUND, 0);
/* !!! FIXME: Case insensitive? */
retval = strncmp(h->mountPoint, fname, mntpntlen-1);
BAIL_IF(retval != 0, PHYSFS_ERR_NOT_FOUND, 0);
if (len > mntpntlen-1) /* corner case... */
BAIL_IF(fname[mntpntlen-1]!='/', PHYSFS_ERR_NOT_FOUND, 0);
fname += mntpntlen-1; /* move to start of actual archive path. */
if (*fname == '/')
fname++;
*_fname = fname; /* skip mountpoint for later use. */
retval = 1; /* may be reset, below. */
} /* if */
start = fname;
if (!allowSymLinks)
{
while (1)
{
PHYSFS_Stat statbuf;
int rc = 0;
end = strchr(start, '/');
if (end != NULL) *end = '\0';
rc = h->funcs->stat(h->opaque, fname, &statbuf);
if (rc)
rc = (statbuf.filetype == PHYSFS_FILETYPE_SYMLINK);
else if (currentErrorCode() == PHYSFS_ERR_NOT_FOUND)
retval = 0;
if (end != NULL) *end = '/';
/* insecure path (has a disallowed symlink in it)? */
BAIL_IF(rc, PHYSFS_ERR_SYMLINK_FORBIDDEN, 0);
/* break out early if path element is missing. */
if (!retval)
{
/*
* We need to clear it if it's the last element of the path,
* since this might be a non-existant file we're opening
* for writing...
*/
if ((end == NULL) || (allowMissing))
retval = 1;
break;
} /* if */
if (end == NULL)
break;
start = end + 1;
} /* while */
} /* if */
return retval;
} /* verifyPath */
static int doMkdir(const char *_dname, char *dname)
{
DirHandle *h;
char *start;
char *end;
int retval = 0;
int exists = 1; /* force existance check on first path element. */
BAIL_IF_ERRPASS(!sanitizePlatformIndependentPath(_dname, dname), 0);
__PHYSFS_platformGrabMutex(stateLock);
BAIL_IF_MUTEX(!writeDir, PHYSFS_ERR_NO_WRITE_DIR, stateLock, 0);
h = writeDir;
BAIL_IF_MUTEX_ERRPASS(!verifyPath(h, &dname, 1), stateLock, 0);
start = dname;
while (1)
{
end = strchr(start, '/');
if (end != NULL)
*end = '\0';
/* only check for existance if all parent dirs existed, too... */
if (exists)
{
PHYSFS_Stat statbuf;
const int rc = h->funcs->stat(h->opaque, dname, &statbuf);
if ((!rc) && (currentErrorCode() == PHYSFS_ERR_NOT_FOUND))
exists = 0;
retval = ((rc) && (statbuf.filetype == PHYSFS_FILETYPE_DIRECTORY));
} /* if */
if (!exists)
retval = h->funcs->mkdir(h->opaque, dname);
if (!retval)
break;
if (end == NULL)
break;
*end = '/';
start = end + 1;
} /* while */
__PHYSFS_platformReleaseMutex(stateLock);
return retval;
} /* doMkdir */
int PHYSFS_mkdir(const char *_dname)
{
int retval = 0;
char *dname;
size_t len;
BAIL_IF(!_dname, PHYSFS_ERR_INVALID_ARGUMENT, 0);
len = strlen(_dname) + 1;
dname = (char *) __PHYSFS_smallAlloc(len);
BAIL_IF(!dname, PHYSFS_ERR_OUT_OF_MEMORY, 0);
retval = doMkdir(_dname, dname);
__PHYSFS_smallFree(dname);
return retval;
} /* PHYSFS_mkdir */
static int doDelete(const char *_fname, char *fname)
{
int retval;
DirHandle *h;
BAIL_IF_ERRPASS(!sanitizePlatformIndependentPath(_fname, fname), 0);
__PHYSFS_platformGrabMutex(stateLock);
BAIL_IF_MUTEX(!writeDir, PHYSFS_ERR_NO_WRITE_DIR, stateLock, 0);
h = writeDir;
BAIL_IF_MUTEX_ERRPASS(!verifyPath(h, &fname, 0), stateLock, 0);
retval = h->funcs->remove(h->opaque, fname);
__PHYSFS_platformReleaseMutex(stateLock);
return retval;
} /* doDelete */
int PHYSFS_delete(const char *_fname)
{
int retval;
char *fname;
size_t len;
BAIL_IF(!_fname, PHYSFS_ERR_INVALID_ARGUMENT, 0);
len = strlen(_fname) + 1;
fname = (char *) __PHYSFS_smallAlloc(len);
BAIL_IF(!fname, PHYSFS_ERR_OUT_OF_MEMORY, 0);
retval = doDelete(_fname, fname);
__PHYSFS_smallFree(fname);
return retval;
} /* PHYSFS_delete */
const char *PHYSFS_getRealDir(const char *_fname)
{
const char *retval = NULL;
char *fname = NULL;
size_t len;
BAIL_IF(!_fname, PHYSFS_ERR_INVALID_ARGUMENT, NULL);
len = strlen(_fname) + 1;
fname = __PHYSFS_smallAlloc(len);
BAIL_IF(!fname, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
if (sanitizePlatformIndependentPath(_fname, fname))
{
DirHandle *i;
__PHYSFS_platformGrabMutex(stateLock);
for (i = searchPath; i != NULL; i = i->next)
{
char *arcfname = fname;
if (partOfMountPoint(i, arcfname))
{
retval = i->dirName;
break;
} /* if */
else if (verifyPath(i, &arcfname, 0))
{
PHYSFS_Stat statbuf;
if (i->funcs->stat(i->opaque, arcfname, &statbuf))
{
retval = i->dirName;
break;
} /* if */
} /* if */
} /* for */
__PHYSFS_platformReleaseMutex(stateLock);
} /* if */
__PHYSFS_smallFree(fname);
return retval;
} /* PHYSFS_getRealDir */
static int locateInStringList(const char *str,
char **list,
PHYSFS_uint32 *pos)
{
PHYSFS_uint32 len = *pos;
PHYSFS_uint32 half_len;
PHYSFS_uint32 lo = 0;
PHYSFS_uint32 middle;
int cmp;
while (len > 0)
{
half_len = len >> 1;
middle = lo + half_len;
cmp = strcmp(list[middle], str);
if (cmp == 0) /* it's in the list already. */
return 1;
else if (cmp > 0)
len = half_len;
else
{
lo = middle + 1;
len -= half_len + 1;
} /* else */
} /* while */
*pos = lo;
return 0;
} /* locateInStringList */
static void enumFilesCallback(void *data, const char *origdir, const char *str)
{
PHYSFS_uint32 pos;
void *ptr;
char *newstr;
EnumStringListCallbackData *pecd = (EnumStringListCallbackData *) data;
/*
* See if file is in the list already, and if not, insert it in there
* alphabetically...
*/
pos = pecd->size;
if (locateInStringList(str, pecd->list, &pos))
return; /* already in the list. */
ptr = allocator.Realloc(pecd->list, (pecd->size + 2) * sizeof (char *));
newstr = (char *) allocator.Malloc(strlen(str) + 1);
if (ptr != NULL)
pecd->list = (char **) ptr;
if ((ptr == NULL) || (newstr == NULL))
return; /* better luck next time. */
strcpy(newstr, str);
if (pos != pecd->size)
{
memmove(&pecd->list[pos+1], &pecd->list[pos],
sizeof (char *) * ((pecd->size) - pos));
} /* if */
pecd->list[pos] = newstr;
pecd->size++;
} /* enumFilesCallback */
char **PHYSFS_enumerateFiles(const char *path)
{
EnumStringListCallbackData ecd;
memset(&ecd, '\0', sizeof (ecd));
ecd.list = (char **) allocator.Malloc(sizeof (char *));
BAIL_IF(!ecd.list, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
PHYSFS_enumerateFilesCallback(path, enumFilesCallback, &ecd);
ecd.list[ecd.size] = NULL;
return ecd.list;
} /* PHYSFS_enumerateFiles */
/*
* Broke out to seperate function so we can use stack allocation gratuitously.
*/
static void enumerateFromMountPoint(DirHandle *i, const char *arcfname,
PHYSFS_EnumFilesCallback callback,
const char *_fname, void *data)
{
const size_t len = strlen(arcfname);
char *ptr = NULL;
char *end = NULL;
const size_t slen = strlen(i->mountPoint) + 1;
char *mountPoint = (char *) __PHYSFS_smallAlloc(slen);
if (mountPoint == NULL)
return; /* oh well. */
strcpy(mountPoint, i->mountPoint);
ptr = mountPoint + ((len) ? len + 1 : 0);
end = strchr(ptr, '/');
assert(end); /* should always find a terminating '/'. */
*end = '\0';
callback(data, _fname, ptr);
__PHYSFS_smallFree(mountPoint);
} /* enumerateFromMountPoint */
typedef struct SymlinkFilterData
{
PHYSFS_EnumFilesCallback callback;
void *callbackData;
DirHandle *dirhandle;
} SymlinkFilterData;
/* !!! FIXME: broken if in a virtual mountpoint (stat call fails). */
static void enumCallbackFilterSymLinks(void *_data, const char *origdir,
const char *fname)
{
const char *trimmedDir = (*origdir == '/') ? (origdir+1) : origdir;
const size_t slen = strlen(trimmedDir) + strlen(fname) + 2;
char *path = (char *) __PHYSFS_smallAlloc(slen);
if (path != NULL)
{
SymlinkFilterData *data = (SymlinkFilterData *) _data;
const DirHandle *dh = data->dirhandle;
PHYSFS_Stat statbuf;
snprintf(path, slen, "%s%s%s", trimmedDir, *trimmedDir ? "/" : "", fname);
if (dh->funcs->stat(dh->opaque, path, &statbuf))
{
/* Pass it on to the application if it's not a symlink. */
if (statbuf.filetype != PHYSFS_FILETYPE_SYMLINK)
data->callback(data->callbackData, origdir, fname);
} /* if */
__PHYSFS_smallFree(path);
} /* if */
} /* enumCallbackFilterSymLinks */
/* !!! FIXME: this should report error conditions. */
void PHYSFS_enumerateFilesCallback(const char *_fname,
PHYSFS_EnumFilesCallback callback,
void *data)
{
size_t len;
char *fname;
BAIL_IF(!_fname, PHYSFS_ERR_INVALID_ARGUMENT, ) /*0*/;
BAIL_IF(!callback, PHYSFS_ERR_INVALID_ARGUMENT, ) /*0*/;
len = strlen(_fname) + 1;
fname = (char *) __PHYSFS_smallAlloc(len);
BAIL_IF(!fname, PHYSFS_ERR_OUT_OF_MEMORY, ) /*0*/;
if (sanitizePlatformIndependentPath(_fname, fname))
{
DirHandle *i;
SymlinkFilterData filterdata;
__PHYSFS_platformGrabMutex(stateLock);
if (!allowSymLinks)
{
memset(&filterdata, '\0', sizeof (filterdata));
filterdata.callback = callback;
filterdata.callbackData = data;
} /* if */
for (i = searchPath; i != NULL; i = i->next)
{
char *arcfname = fname;
if (partOfMountPoint(i, arcfname))
enumerateFromMountPoint(i, arcfname, callback, _fname, data);
else if (verifyPath(i, &arcfname, 0))
{
if ((!allowSymLinks) && (i->funcs->info.supportsSymlinks))
{
filterdata.dirhandle = i;
i->funcs->enumerateFiles(i->opaque, arcfname,
enumCallbackFilterSymLinks,
_fname, &filterdata);
} /* if */
else
{
i->funcs->enumerateFiles(i->opaque, arcfname,
callback, _fname, data);
} /* else */
} /* else if */
} /* for */
__PHYSFS_platformReleaseMutex(stateLock);
} /* if */
__PHYSFS_smallFree(fname);
} /* PHYSFS_enumerateFilesCallback */
int PHYSFS_exists(const char *fname)
{
return (PHYSFS_getRealDir(fname) != NULL);
} /* PHYSFS_exists */
PHYSFS_sint64 PHYSFS_getLastModTime(const char *fname)
{
PHYSFS_Stat statbuf;
BAIL_IF_ERRPASS(!PHYSFS_stat(fname, &statbuf), -1);
return statbuf.modtime;
} /* PHYSFS_getLastModTime */
int PHYSFS_isDirectory(const char *fname)
{
PHYSFS_Stat statbuf;
BAIL_IF_ERRPASS(!PHYSFS_stat(fname, &statbuf), 0);
return (statbuf.filetype == PHYSFS_FILETYPE_DIRECTORY);
} /* PHYSFS_isDirectory */
int PHYSFS_isSymbolicLink(const char *fname)
{
PHYSFS_Stat statbuf;
BAIL_IF_ERRPASS(!PHYSFS_stat(fname, &statbuf), 0);
return (statbuf.filetype == PHYSFS_FILETYPE_SYMLINK);
} /* PHYSFS_isSymbolicLink */
static PHYSFS_File *doOpenWrite(const char *_fname, int appending)
{
FileHandle *fh = NULL;
size_t len;
char *fname;
BAIL_IF(!_fname, PHYSFS_ERR_INVALID_ARGUMENT, 0);
len = strlen(_fname) + 1;
fname = (char *) __PHYSFS_smallAlloc(len);
BAIL_IF(!fname, PHYSFS_ERR_OUT_OF_MEMORY, 0);
if (sanitizePlatformIndependentPath(_fname, fname))
{
PHYSFS_Io *io = NULL;
DirHandle *h = NULL;
const PHYSFS_Archiver *f;
__PHYSFS_platformGrabMutex(stateLock);
GOTO_IF(!writeDir, PHYSFS_ERR_NO_WRITE_DIR, doOpenWriteEnd);
h = writeDir;
GOTO_IF_ERRPASS(!verifyPath(h, &fname, 0), doOpenWriteEnd);
f = h->funcs;
if (appending)
io = f->openAppend(h->opaque, fname);
else
io = f->openWrite(h->opaque, fname);
GOTO_IF_ERRPASS(!io, doOpenWriteEnd);
fh = (FileHandle *) allocator.Malloc(sizeof (FileHandle));
if (fh == NULL)
{
io->destroy(io);
GOTO(PHYSFS_ERR_OUT_OF_MEMORY, doOpenWriteEnd);
} /* if */
else
{
memset(fh, '\0', sizeof (FileHandle));
fh->io = io;
fh->dirHandle = h;
fh->next = openWriteList;
openWriteList = fh;
} /* else */
doOpenWriteEnd:
__PHYSFS_platformReleaseMutex(stateLock);
} /* if */
__PHYSFS_smallFree(fname);
return ((PHYSFS_File *) fh);
} /* doOpenWrite */
PHYSFS_File *PHYSFS_openWrite(const char *filename)
{
return doOpenWrite(filename, 0);
} /* PHYSFS_openWrite */
PHYSFS_File *PHYSFS_openAppend(const char *filename)
{
return doOpenWrite(filename, 1);
} /* PHYSFS_openAppend */
PHYSFS_File *PHYSFS_openRead(const char *_fname)
{
FileHandle *fh = NULL;
char *fname;
size_t len;
BAIL_IF(!_fname, PHYSFS_ERR_INVALID_ARGUMENT, 0);
len = strlen(_fname) + 1;
fname = (char *) __PHYSFS_smallAlloc(len);
BAIL_IF(!fname, PHYSFS_ERR_OUT_OF_MEMORY, 0);
if (sanitizePlatformIndependentPath(_fname, fname))
{
DirHandle *i = NULL;
PHYSFS_Io *io = NULL;
__PHYSFS_platformGrabMutex(stateLock);
GOTO_IF(!searchPath, PHYSFS_ERR_NOT_FOUND, openReadEnd);
for (i = searchPath; i != NULL; i = i->next)
{
char *arcfname = fname;
if (verifyPath(i, &arcfname, 0))
{
io = i->funcs->openRead(i->opaque, arcfname);
if (io)
break;
} /* if */
} /* for */
GOTO_IF_ERRPASS(!io, openReadEnd);
fh = (FileHandle *) allocator.Malloc(sizeof (FileHandle));
if (fh == NULL)
{
io->destroy(io);
GOTO(PHYSFS_ERR_OUT_OF_MEMORY, openReadEnd);
} /* if */
memset(fh, '\0', sizeof (FileHandle));
fh->io = io;
fh->forReading = 1;
fh->dirHandle = i;
fh->next = openReadList;
openReadList = fh;
openReadEnd:
__PHYSFS_platformReleaseMutex(stateLock);
} /* if */
__PHYSFS_smallFree(fname);
return ((PHYSFS_File *) fh);
} /* PHYSFS_openRead */
static int closeHandleInOpenList(FileHandle **list, FileHandle *handle)
{
FileHandle *prev = NULL;
FileHandle *i;
int rc = 1;
for (i = *list; i != NULL; i = i->next)
{
if (i == handle) /* handle is in this list? */
{
PHYSFS_Io *io = handle->io;
PHYSFS_uint8 *tmp = handle->buffer;
rc = PHYSFS_flush((PHYSFS_File *) handle);
if (!rc)
return -1;
io->destroy(io);
if (tmp != NULL) /* free any associated buffer. */
allocator.Free(tmp);
if (prev == NULL)
*list = handle->next;
else
prev->next = handle->next;
allocator.Free(handle);
return 1;
} /* if */
prev = i;
} /* for */
return 0;
} /* closeHandleInOpenList */
int PHYSFS_close(PHYSFS_File *_handle)
{
FileHandle *handle = (FileHandle *) _handle;
int rc;
__PHYSFS_platformGrabMutex(stateLock);
/* -1 == close failure. 0 == not found. 1 == success. */
rc = closeHandleInOpenList(&openReadList, handle);
BAIL_IF_MUTEX_ERRPASS(rc == -1, stateLock, 0);
if (!rc)
{
rc = closeHandleInOpenList(&openWriteList, handle);
BAIL_IF_MUTEX_ERRPASS(rc == -1, stateLock, 0);
} /* if */
__PHYSFS_platformReleaseMutex(stateLock);
BAIL_IF(!rc, PHYSFS_ERR_INVALID_ARGUMENT, 0);
return 1;
} /* PHYSFS_close */
static PHYSFS_sint64 doBufferedRead(FileHandle *fh, void *buffer,
PHYSFS_uint64 len)
{
PHYSFS_Io *io = NULL;
PHYSFS_sint64 retval = 0;
PHYSFS_uint32 buffered = 0;
PHYSFS_sint64 rc = 0;
if (len == 0)
return 0;
buffered = fh->buffill - fh->bufpos;
if (buffered >= len) /* totally in the buffer, just copy and return! */
{
memcpy(buffer, fh->buffer + fh->bufpos, (size_t) len);
fh->bufpos += (PHYSFS_uint32) len;
return (PHYSFS_sint64) len;
} /* if */
else if (buffered > 0) /* partially in the buffer... */
{
memcpy(buffer, fh->buffer + fh->bufpos, (size_t) buffered);
buffer = ((PHYSFS_uint8 *) buffer) + buffered;
len -= buffered;
retval = buffered;
} /* if */
/* if you got here, the buffer is drained and we still need bytes. */
assert(len > 0);
fh->buffill = fh->bufpos = 0;
io = fh->io;
if (len >= fh->bufsize) /* need more than the buffer takes. */
{
/* leave buffer empty, go right to output instead. */
rc = io->read(io, buffer, len);
if (rc < 0)
return ((retval == 0) ? rc : retval);
return retval + rc;
} /* if */
/* need less than buffer can take. Fill buffer. */
rc = io->read(io, fh->buffer, fh->bufsize);
if (rc < 0)
return ((retval == 0) ? rc : retval);
assert(fh->bufpos == 0);
fh->buffill = (PHYSFS_uint32) rc;
rc = doBufferedRead(fh, buffer, len); /* go from the start, again. */
if (rc < 0)
return ((retval == 0) ? rc : retval);
return retval + rc;
} /* doBufferedRead */
PHYSFS_sint64 PHYSFS_read(PHYSFS_File *handle, void *buffer,
PHYSFS_uint32 size, PHYSFS_uint32 count)
{
const PHYSFS_uint64 len = ((PHYSFS_uint64) size) * ((PHYSFS_uint64) count);
const PHYSFS_sint64 retval = PHYSFS_readBytes(handle, buffer, len);
return ( (retval <= 0) ? retval : (retval / ((PHYSFS_sint64) size)) );
} /* PHYSFS_read */
PHYSFS_sint64 PHYSFS_readBytes(PHYSFS_File *handle, void *buffer,
PHYSFS_uint64 len)
{
FileHandle *fh = (FileHandle *) handle;
#ifdef PHYSFS_NO_64BIT_SUPPORT
const PHYSFS_uint64 maxlen = __PHYSFS_UI64(0x7FFFFFFF);
#else
const PHYSFS_uint64 maxlen = __PHYSFS_UI64(0x7FFFFFFFFFFFFFFF);
#endif
if (!__PHYSFS_ui64FitsAddressSpace(len))
BAIL(PHYSFS_ERR_INVALID_ARGUMENT, -1);
BAIL_IF(len > maxlen, PHYSFS_ERR_INVALID_ARGUMENT, -1);
BAIL_IF(!fh->forReading, PHYSFS_ERR_OPEN_FOR_WRITING, -1);
BAIL_IF_ERRPASS(len == 0, 0);
if (fh->buffer)
return doBufferedRead(fh, buffer, len);
return fh->io->read(fh->io, buffer, len);
} /* PHYSFS_readBytes */
static PHYSFS_sint64 doBufferedWrite(PHYSFS_File *handle, const void *buffer,
PHYSFS_uint64 len)
{
FileHandle *fh = (FileHandle *) handle;
/* whole thing fits in the buffer? */
if ( (((PHYSFS_uint64) fh->buffill) + len) < fh->bufsize )
{
memcpy(fh->buffer + fh->buffill, buffer, (size_t) len);
fh->buffill += (PHYSFS_uint32) len;
return (PHYSFS_sint64) len;
} /* if */
/* would overflow buffer. Flush and then write the new objects, too. */
BAIL_IF_ERRPASS(!PHYSFS_flush(handle), -1);
return fh->io->write(fh->io, buffer, len);
} /* doBufferedWrite */
PHYSFS_sint64 PHYSFS_write(PHYSFS_File *handle, const void *buffer,
PHYSFS_uint32 size, PHYSFS_uint32 count)
{
const PHYSFS_uint64 len = ((PHYSFS_uint64) size) * ((PHYSFS_uint64) count);
const PHYSFS_sint64 retval = PHYSFS_writeBytes(handle, buffer, len);
return ( (retval <= 0) ? retval : (retval / ((PHYSFS_sint64) size)) );
} /* PHYSFS_write */
PHYSFS_sint64 PHYSFS_writeBytes(PHYSFS_File *handle, const void *buffer,
PHYSFS_uint64 len)
{
FileHandle *fh = (FileHandle *) handle;
#ifdef PHYSFS_NO_64BIT_SUPPORT
const PHYSFS_uint64 maxlen = __PHYSFS_UI64(0x7FFFFFFF);
#else
const PHYSFS_uint64 maxlen = __PHYSFS_UI64(0x7FFFFFFFFFFFFFFF);
#endif
if (!__PHYSFS_ui64FitsAddressSpace(len))
BAIL(PHYSFS_ERR_INVALID_ARGUMENT, -1);
BAIL_IF(len > maxlen, PHYSFS_ERR_INVALID_ARGUMENT, -1);
BAIL_IF(fh->forReading, PHYSFS_ERR_OPEN_FOR_READING, -1);
BAIL_IF_ERRPASS(len == 0, 0);
if (fh->buffer)
return doBufferedWrite(handle, buffer, len);
return fh->io->write(fh->io, buffer, len);
} /* PHYSFS_write */
int PHYSFS_eof(PHYSFS_File *handle)
{
FileHandle *fh = (FileHandle *) handle;
if (!fh->forReading) /* never EOF on files opened for write/append. */
return 0;
/* can't be eof if buffer isn't empty */
if (fh->bufpos == fh->buffill)
{
/* check the Io. */
PHYSFS_Io *io = fh->io;
const PHYSFS_sint64 pos = io->tell(io);
const PHYSFS_sint64 len = io->length(io);
if ((pos < 0) || (len < 0))
return 0; /* beats me. */
return (pos >= len);
} /* if */
return 0;
} /* PHYSFS_eof */
PHYSFS_sint64 PHYSFS_tell(PHYSFS_File *handle)
{
FileHandle *fh = (FileHandle *) handle;
const PHYSFS_sint64 pos = fh->io->tell(fh->io);
const PHYSFS_sint64 retval = fh->forReading ?
(pos - fh->buffill) + fh->bufpos :
(pos + fh->buffill);
return retval;
} /* PHYSFS_tell */
int PHYSFS_seek(PHYSFS_File *handle, PHYSFS_uint64 pos)
{
FileHandle *fh = (FileHandle *) handle;
BAIL_IF_ERRPASS(!PHYSFS_flush(handle), 0);
if (fh->buffer && fh->forReading)
{
/* avoid throwing away our precious buffer if seeking within it. */
PHYSFS_sint64 offset = pos - PHYSFS_tell(handle);
if ( /* seeking within the already-buffered range? */
((offset >= 0) && (offset <= fh->buffill - fh->bufpos)) /* fwd */
|| ((offset < 0) && (-offset <= fh->bufpos)) /* backward */ )
{
fh->bufpos += (PHYSFS_uint32) offset;
return 1; /* successful seek */
} /* if */
} /* if */
/* we have to fall back to a 'raw' seek. */
fh->buffill = fh->bufpos = 0;
return fh->io->seek(fh->io, pos);
} /* PHYSFS_seek */
PHYSFS_sint64 PHYSFS_fileLength(PHYSFS_File *handle)
{
PHYSFS_Io *io = ((FileHandle *) handle)->io;
return io->length(io);
} /* PHYSFS_filelength */
int PHYSFS_setBuffer(PHYSFS_File *handle, PHYSFS_uint64 _bufsize)
{
FileHandle *fh = (FileHandle *) handle;
PHYSFS_uint32 bufsize;
/* !!! FIXME: actually, why use 32 bits here? */
/*BAIL_IF(_bufsize > 0xFFFFFFFF, "buffer must fit in 32-bits", 0);*/
BAIL_IF(_bufsize > __PHYSFS_UI64(0xFFFFFFFF), PHYSFS_ERR_INVALID_ARGUMENT, 0);
bufsize = (PHYSFS_uint32) _bufsize;
BAIL_IF_ERRPASS(!PHYSFS_flush(handle), 0);
/*
* For reads, we need to move the file pointer to where it would be
* if we weren't buffering, so that the next read will get the
* right chunk of stuff from the file. PHYSFS_flush() handles writes.
*/
if ((fh->forReading) && (fh->buffill != fh->bufpos))
{
PHYSFS_uint64 pos;
const PHYSFS_sint64 curpos = fh->io->tell(fh->io);
BAIL_IF_ERRPASS(curpos == -1, 0);
pos = ((curpos - fh->buffill) + fh->bufpos);
BAIL_IF_ERRPASS(!fh->io->seek(fh->io, pos), 0);
} /* if */
if (bufsize == 0) /* delete existing buffer. */
{
if (fh->buffer)
{
allocator.Free(fh->buffer);
fh->buffer = NULL;
} /* if */
} /* if */
else
{
PHYSFS_uint8 *newbuf;
newbuf = (PHYSFS_uint8 *) allocator.Realloc(fh->buffer, bufsize);
BAIL_IF(!newbuf, PHYSFS_ERR_OUT_OF_MEMORY, 0);
fh->buffer = newbuf;
} /* else */
fh->bufsize = bufsize;
fh->buffill = fh->bufpos = 0;
return 1;
} /* PHYSFS_setBuffer */
int PHYSFS_flush(PHYSFS_File *handle)
{
FileHandle *fh = (FileHandle *) handle;
PHYSFS_Io *io;
PHYSFS_sint64 rc;
if ((fh->forReading) || (fh->bufpos == fh->buffill))
return 1; /* open for read or buffer empty are successful no-ops. */
/* dump buffer to disk. */
io = fh->io;
rc = io->write(io, fh->buffer + fh->bufpos, fh->buffill - fh->bufpos);
BAIL_IF_ERRPASS(rc <= 0, 0);
fh->bufpos = fh->buffill = 0;
return io->flush ? io->flush(io) : 1;
} /* PHYSFS_flush */
int PHYSFS_stat(const char *_fname, PHYSFS_Stat *stat)
{
int retval = 0;
char *fname;
size_t len;
BAIL_IF(!_fname, PHYSFS_ERR_INVALID_ARGUMENT, 0);
BAIL_IF(!stat, PHYSFS_ERR_INVALID_ARGUMENT, 0);
len = strlen(_fname) + 1;
fname = (char *) __PHYSFS_smallAlloc(len);
BAIL_IF(!fname, PHYSFS_ERR_OUT_OF_MEMORY, 0);
/* set some sane defaults... */
stat->filesize = -1;
stat->modtime = -1;
stat->createtime = -1;
stat->accesstime = -1;
stat->filetype = PHYSFS_FILETYPE_OTHER;
stat->readonly = 1; /* !!! FIXME */
if (sanitizePlatformIndependentPath(_fname, fname))
{
if (*fname == '\0')
{
stat->filetype = PHYSFS_FILETYPE_DIRECTORY;
stat->readonly = !writeDir; /* Writeable if we have a writeDir */
retval = 1;
} /* if */
else
{
DirHandle *i;
int exists = 0;
__PHYSFS_platformGrabMutex(stateLock);
for (i = searchPath; ((i != NULL) && (!exists)); i = i->next)
{
char *arcfname = fname;
exists = partOfMountPoint(i, arcfname);
if (exists)
{
stat->filetype = PHYSFS_FILETYPE_DIRECTORY;
stat->readonly = 1; /* !!! FIXME */
retval = 1;
} /* if */
else if (verifyPath(i, &arcfname, 0))
{
/* !!! FIXME: this test is wrong and should be elsewhere. */
stat->readonly = !(writeDir &&
(strcmp(writeDir->dirName, i->dirName) == 0));
retval = i->funcs->stat(i->opaque, arcfname, stat);
if ((retval) || (currentErrorCode() != PHYSFS_ERR_NOT_FOUND))
exists = 1;
} /* else if */
} /* for */
__PHYSFS_platformReleaseMutex(stateLock);
} /* else */
} /* if */
__PHYSFS_smallFree(fname);
return retval;
} /* PHYSFS_stat */
int __PHYSFS_readAll(PHYSFS_Io *io, void *buf, const PHYSFS_uint64 len)
{
return (io->read(io, buf, len) == len);
} /* __PHYSFS_readAll */
void *__PHYSFS_initSmallAlloc(void *ptr, PHYSFS_uint64 len)
{
void *useHeap = ((ptr == NULL) ? ((void *) 1) : ((void *) 0));
if (useHeap) /* too large for stack allocation or alloca() failed. */
ptr = allocator.Malloc(len+sizeof (void *));
if (ptr != NULL)
{
void **retval = (void **) ptr;
/*printf("%s alloc'd (%d) bytes at (%p).\n",
useHeap ? "heap" : "stack", (int) len, ptr);*/
*retval = useHeap;
return retval + 1;
} /* if */
return NULL; /* allocation failed. */
} /* __PHYSFS_initSmallAlloc */
void __PHYSFS_smallFree(void *ptr)
{
if (ptr != NULL)
{
void **block = ((void **) ptr) - 1;
const int useHeap = (*block != 0);
if (useHeap)
allocator.Free(block);
/*printf("%s free'd (%p).\n", useHeap ? "heap" : "stack", block);*/
} /* if */
} /* __PHYSFS_smallFree */
int PHYSFS_setAllocator(const PHYSFS_Allocator *a)
{
BAIL_IF(initialized, PHYSFS_ERR_IS_INITIALIZED, 0);
externalAllocator = (a != NULL);
if (externalAllocator)
memcpy(&allocator, a, sizeof (PHYSFS_Allocator));
return 1;
} /* PHYSFS_setAllocator */
const PHYSFS_Allocator *PHYSFS_getAllocator(void)
{
BAIL_IF(!initialized, PHYSFS_ERR_NOT_INITIALIZED, NULL);
return &allocator;
} /* PHYSFS_getAllocator */
static void *mallocAllocatorMalloc(PHYSFS_uint64 s)
{
if (!__PHYSFS_ui64FitsAddressSpace(s))
BAIL(PHYSFS_ERR_OUT_OF_MEMORY, NULL);
#undef malloc
return malloc((size_t) s);
} /* mallocAllocatorMalloc */
static void *mallocAllocatorRealloc(void *ptr, PHYSFS_uint64 s)
{
if (!__PHYSFS_ui64FitsAddressSpace(s))
BAIL(PHYSFS_ERR_OUT_OF_MEMORY, NULL);
#undef realloc
return realloc(ptr, (size_t) s);
} /* mallocAllocatorRealloc */
static void mallocAllocatorFree(void *ptr)
{
#undef free
free(ptr);
} /* mallocAllocatorFree */
static void setDefaultAllocator(void)
{
assert(!externalAllocator);
allocator.Init = NULL;
allocator.Deinit = NULL;
allocator.Malloc = mallocAllocatorMalloc;
allocator.Realloc = mallocAllocatorRealloc;
allocator.Free = mallocAllocatorFree;
} /* setDefaultAllocator */
/* end of physfs.c ... */
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