diff -r 9afb44f030b6 -r 9d1d0fa8db02 misc/physfs/src/physfs.c --- a/misc/physfs/src/physfs.c Wed Feb 27 16:12:22 2013 +0100 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,2744 +0,0 @@ -/** - * 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. */ -/* !!! FIXME: use snprintf(), not sprintf(). */ - -#define __PHYSICSFS_INTERNAL__ -#include "physfs_internal.h" - - -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; - - -/* The various i/o drivers...some of these may not be compiled in. */ -extern const PHYSFS_Archiver __PHYSFS_Archiver_ZIP; -extern const PHYSFS_Archiver __PHYSFS_Archiver_LZMA; -extern const PHYSFS_Archiver __PHYSFS_Archiver_GRP; -extern const PHYSFS_Archiver __PHYSFS_Archiver_QPAK; -extern const PHYSFS_Archiver __PHYSFS_Archiver_HOG; -extern const PHYSFS_Archiver __PHYSFS_Archiver_MVL; -extern const PHYSFS_Archiver __PHYSFS_Archiver_WAD; -extern const PHYSFS_Archiver __PHYSFS_Archiver_DIR; -extern const PHYSFS_Archiver __PHYSFS_Archiver_ISO9660; - -static const PHYSFS_Archiver *staticArchivers[] = -{ -#if PHYSFS_SUPPORTS_ZIP - &__PHYSFS_Archiver_ZIP, -#endif -#if PHYSFS_SUPPORTS_7Z - &__PHYSFS_Archiver_LZMA, -#endif -#if PHYSFS_SUPPORTS_GRP - &__PHYSFS_Archiver_GRP, -#endif -#if PHYSFS_SUPPORTS_QPAK - &__PHYSFS_Archiver_QPAK, -#endif -#if PHYSFS_SUPPORTS_HOG - &__PHYSFS_Archiver_HOG, -#endif -#if PHYSFS_SUPPORTS_MVL - &__PHYSFS_Archiver_MVL, -#endif -#if PHYSFS_SUPPORTS_WAD - &__PHYSFS_Archiver_WAD, -#endif -#if PHYSFS_SUPPORTS_ISO9660 - &__PHYSFS_Archiver_ISO9660, -#endif - NULL -}; - - - -/* 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 const PHYSFS_Archiver **archivers = NULL; -static const PHYSFS_ArchiveInfo **archiveInfo = NULL; - -/* 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_MACRO(!io, PHYSFS_ERR_OUT_OF_MEMORY, createNativeIo_failed); - info = (NativeIoInfo *) allocator.Malloc(sizeof (NativeIoInfo)); - GOTO_IF_MACRO(!info, PHYSFS_ERR_OUT_OF_MEMORY, createNativeIo_failed); - pathdup = (char *) allocator.Malloc(strlen(path) + 1); - GOTO_IF_MACRO(!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_MACRO(!handle, ERRPASS, 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_MACRO(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_MACRO(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_MACRO(!retval, PHYSFS_ERR_OUT_OF_MEMORY, NULL); - newinfo = (MemoryIoInfo *) allocator.Malloc(sizeof (MemoryIoInfo)); - if (!newinfo) - { - allocator.Free(retval); - BAIL_MACRO(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_MACRO(!io, PHYSFS_ERR_OUT_OF_MEMORY, createMemoryIo_failed); - info = (MemoryIoInfo *) allocator.Malloc(sizeof (MemoryIoInfo)); - GOTO_IF_MACRO(!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_MACRO(!newfh, PHYSFS_ERR_OUT_OF_MEMORY, handleIo_dupe_failed); - memset(newfh, '\0', sizeof (*newfh)); - - retval = (PHYSFS_Io *) allocator.Malloc(sizeof (PHYSFS_Io)); - GOTO_IF_MACRO(!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_MACRO(PHYSFS_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, ERRPASS, 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_MACRO(!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_MACRO(!ecd.list, PHYSFS_ERR_OUT_OF_MEMORY, NULL); - func(enumStringListCallback, &ecd); - - if (ecd.errcode) - { - __PHYSFS_setError(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: - * http://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 */ - - -void __PHYSFS_setError(const 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_setError */ - - -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_NO_SUCH_PATH: return "no such path"; - 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"; - } /* switch */ - - return NULL; /* don't know this error code. */ -} /* PHYSFS_getErrorByCode */ - - -void PHYSFS_setErrorCode(PHYSFS_ErrorCode code) -{ - __PHYSFS_setError(code); -} /* 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_MACRO(!io->seek(io, 0), ERRPASS, 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; - const PHYSFS_Archiver **i; - const char *ext; - - 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_MACRO(!io, ERRPASS, 0); - } /* 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_stricmpASCII(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_stricmpASCII(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 */ - - BAIL_IF_MACRO(!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_MACRO(PHYSFS_ERR_BAD_FILENAME, 0); - - if (ch == '/') /* path separator. */ - { - *dst = '\0'; /* "." and ".." are illegal pathnames. */ - if ((strcmp(prev, ".") == 0) || (strcmp(prev, "..") == 0)) - BAIL_MACRO(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_MACRO(!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_MACRO(!dirHandle, ERRPASS, badDirHandle); - - if (newDir == NULL) - dirHandle->dirName = NULL; - else - { - dirHandle->dirName = (char *) allocator.Malloc(strlen(newDir) + 1); - if (!dirHandle->dirName) - GOTO_MACRO(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_MACRO(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_MACRO(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_MACRO(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_MACRO(!retval, PHYSFS_ERR_OUT_OF_MEMORY, NULL); - memcpy(retval, argv0, size); - retval[size] = '\0'; - return retval; - } /* if */ - - /* argv0 wasn't helpful. */ - BAIL_MACRO(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 void setDefaultAllocator(void); - -static int initStaticArchivers(void) -{ - const size_t numStaticArchivers = __PHYSFS_ARRAYLEN(staticArchivers); - const size_t len = numStaticArchivers * sizeof (void *); - size_t i; - - assert(numStaticArchivers > 0); /* seriously, none at all?! */ - assert(staticArchivers[numStaticArchivers - 1] == NULL); - - archiveInfo = (const PHYSFS_ArchiveInfo **) allocator.Malloc(len); - BAIL_IF_MACRO(!archiveInfo, PHYSFS_ERR_OUT_OF_MEMORY, 0); - archivers = (const PHYSFS_Archiver **) allocator.Malloc(len); - BAIL_IF_MACRO(!archivers, PHYSFS_ERR_OUT_OF_MEMORY, 0); - - for (i = 0; i < numStaticArchivers - 1; i++) - archiveInfo[i] = &staticArchivers[i]->info; - archiveInfo[numStaticArchivers - 1] = NULL; - - memcpy(archivers, staticArchivers, len); - - return 1; -} /* initStaticArchivers */ - - -static int doDeinit(void); - -int PHYSFS_init(const char *argv0) -{ - BAIL_IF_MACRO(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_setError(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)) - { - *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 */ - - -static int doDeinit(void) -{ - BAIL_IF_MACRO(!__PHYSFS_platformDeinit(), ERRPASS, 0); - - closeFileHandleList(&openWriteList); - BAIL_IF_MACRO(!PHYSFS_setWriteDir(NULL), PHYSFS_ERR_FILES_STILL_OPEN, 0); - - freeSearchPath(); - 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; - return 1; -} /* doDeinit */ - - -int PHYSFS_deinit(void) -{ - BAIL_IF_MACRO(!initialized, PHYSFS_ERR_NOT_INITIALIZED, 0); - return doDeinit(); -} /* PHYSFS_deinit */ - - -int PHYSFS_isInit(void) -{ - return initialized; -} /* PHYSFS_isInit */ - - -const PHYSFS_ArchiveInfo **PHYSFS_supportedArchiveTypes(void) -{ - BAIL_IF_MACRO(!initialized, PHYSFS_ERR_NOT_INITIALIZED, NULL); - return 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; - int exists = 0; - - BAIL_IF_MACRO(!initialized, PHYSFS_ERR_NOT_INITIALIZED, 0); - BAIL_IF_MACRO(!org, PHYSFS_ERR_INVALID_ARGUMENT, NULL); - BAIL_IF_MACRO(*org == '\0', PHYSFS_ERR_INVALID_ARGUMENT, NULL); - BAIL_IF_MACRO(!app, PHYSFS_ERR_INVALID_ARGUMENT, NULL); - BAIL_IF_MACRO(*app == '\0', PHYSFS_ERR_INVALID_ARGUMENT, NULL); - - allocator.Free(prefDir); - prefDir = __PHYSFS_platformCalcPrefDir(org, app); - BAIL_IF_MACRO(!prefDir, ERRPASS, 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, &exists, &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_MACRO_MUTEX(!freeDirHandle(writeDir, openWriteList), ERRPASS, - 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_MACRO_MUTEX(ERRPASS, stateLock, 1); - prev = i; - } /* for */ - } /* if */ - - dh = createDirHandle(io, fname, mountPoint, 0); - BAIL_IF_MACRO_MUTEX(!dh, ERRPASS, 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_MACRO(!io, PHYSFS_ERR_INVALID_ARGUMENT, 0); - BAIL_IF_MACRO(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_MACRO(!buf, PHYSFS_ERR_INVALID_ARGUMENT, 0); - - io = __PHYSFS_createMemoryIo(buf, len, del); - BAIL_IF_MACRO(!io, ERRPASS, 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_MACRO(file == NULL, PHYSFS_ERR_INVALID_ARGUMENT, 0); - - io = __PHYSFS_createHandleIo(file); - BAIL_IF_MACRO(!io, ERRPASS, 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_MACRO(!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_MACRO(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_MACRO_MUTEX(!freeDirHandle(i, openReadList), ERRPASS, - stateLock, 0); - - if (prev == NULL) - searchPath = next; - else - prev->next = next; - - BAIL_MACRO_MUTEX(ERRPASS, stateLock, 1); - } /* if */ - prev = i; - } /* for */ - - BAIL_MACRO_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_MACRO(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) - { - sprintf(str, "%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_MACRO(!initialized, PHYSFS_ERR_NOT_INITIALIZED, 0); - - prefdir = PHYSFS_getPrefDir(organization, appName); - BAIL_IF_MACRO(!prefdir, ERRPASS, 0); - - basedir = PHYSFS_getBaseDir(); - BAIL_IF_MACRO(!basedir, ERRPASS, 0); - - BAIL_IF_MACRO(!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_stricmpASCII(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_MACRO(len < mntpntlen-1, PHYSFS_ERR_NO_SUCH_PATH, 0); - /* !!! FIXME: Case insensitive? */ - retval = strncmp(h->mountPoint, fname, mntpntlen-1); - BAIL_IF_MACRO(retval != 0, PHYSFS_ERR_NO_SUCH_PATH, 0); - if (len > mntpntlen-1) /* corner case... */ - BAIL_IF_MACRO(fname[mntpntlen-1]!='/', PHYSFS_ERR_NO_SUCH_PATH, 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, &retval, &statbuf); - if (rc) - rc = (statbuf.filetype == PHYSFS_FILETYPE_SYMLINK); - if (end != NULL) *end = '/'; - - /* insecure path (has a disallowed symlink in it)? */ - BAIL_IF_MACRO(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_MACRO(!sanitizePlatformIndependentPath(_dname, dname), ERRPASS, 0); - - __PHYSFS_platformGrabMutex(stateLock); - BAIL_IF_MACRO_MUTEX(!writeDir, PHYSFS_ERR_NO_WRITE_DIR, stateLock, 0); - h = writeDir; - BAIL_IF_MACRO_MUTEX(!verifyPath(h, &dname, 1), ERRPASS, 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, &exists, &statbuf); - 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_MACRO(!_dname, PHYSFS_ERR_INVALID_ARGUMENT, 0); - len = strlen(_dname) + 1; - dname = (char *) __PHYSFS_smallAlloc(len); - BAIL_IF_MACRO(!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_MACRO(!sanitizePlatformIndependentPath(_fname, fname), ERRPASS, 0); - - __PHYSFS_platformGrabMutex(stateLock); - - BAIL_IF_MACRO_MUTEX(!writeDir, PHYSFS_ERR_NO_WRITE_DIR, stateLock, 0); - h = writeDir; - BAIL_IF_MACRO_MUTEX(!verifyPath(h, &fname, 0), ERRPASS, 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_MACRO(!_fname, PHYSFS_ERR_INVALID_ARGUMENT, 0); - len = strlen(_fname) + 1; - fname = (char *) __PHYSFS_smallAlloc(len); - BAIL_IF_MACRO(!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_MACRO(!_fname, PHYSFS_ERR_INVALID_ARGUMENT, NULL); - len = strlen(_fname) + 1; - fname = __PHYSFS_smallAlloc(len); - BAIL_IF_MACRO(!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; - int exists = 0; - if (i->funcs->stat(i->opaque, arcfname, &exists, &statbuf)) - { - if (exists) - 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_MACRO(!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 */ - - -/* !!! FIXME: this should report error conditions. */ -void PHYSFS_enumerateFilesCallback(const char *_fname, - PHYSFS_EnumFilesCallback callback, - void *data) -{ - size_t len; - char *fname; - - BAIL_IF_MACRO(!_fname, PHYSFS_ERR_INVALID_ARGUMENT, ) /*0*/; - BAIL_IF_MACRO(!callback, PHYSFS_ERR_INVALID_ARGUMENT, ) /*0*/; - - len = strlen(_fname) + 1; - fname = (char *) __PHYSFS_smallAlloc(len); - BAIL_IF_MACRO(!fname, PHYSFS_ERR_OUT_OF_MEMORY, ) /*0*/; - - if (sanitizePlatformIndependentPath(_fname, fname)) - { - DirHandle *i; - int noSyms; - - __PHYSFS_platformGrabMutex(stateLock); - noSyms = !allowSymLinks; - 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)) - { - i->funcs->enumerateFiles(i->opaque, arcfname, noSyms, - callback, _fname, data); - } /* 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_MACRO(!PHYSFS_stat(fname, &statbuf), ERRPASS, -1); - return statbuf.modtime; -} /* PHYSFS_getLastModTime */ - - -int PHYSFS_isDirectory(const char *fname) -{ - PHYSFS_Stat statbuf; - BAIL_IF_MACRO(!PHYSFS_stat(fname, &statbuf), ERRPASS, 0); - return (statbuf.filetype == PHYSFS_FILETYPE_DIRECTORY); -} /* PHYSFS_isDirectory */ - - -int PHYSFS_isSymbolicLink(const char *fname) -{ - PHYSFS_Stat statbuf; - BAIL_IF_MACRO(!PHYSFS_stat(fname, &statbuf), ERRPASS, 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_MACRO(!_fname, PHYSFS_ERR_INVALID_ARGUMENT, 0); - len = strlen(_fname) + 1; - fname = (char *) __PHYSFS_smallAlloc(len); - BAIL_IF_MACRO(!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_MACRO(!writeDir, PHYSFS_ERR_NO_WRITE_DIR, doOpenWriteEnd); - - h = writeDir; - GOTO_IF_MACRO(!verifyPath(h, &fname, 0), ERRPASS, doOpenWriteEnd); - - f = h->funcs; - if (appending) - io = f->openAppend(h->opaque, fname); - else - io = f->openWrite(h->opaque, fname); - - GOTO_IF_MACRO(!io, ERRPASS, doOpenWriteEnd); - - fh = (FileHandle *) allocator.Malloc(sizeof (FileHandle)); - if (fh == NULL) - { - io->destroy(io); - GOTO_MACRO(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_MACRO(!_fname, PHYSFS_ERR_INVALID_ARGUMENT, 0); - len = strlen(_fname) + 1; - fname = (char *) __PHYSFS_smallAlloc(len); - BAIL_IF_MACRO(!fname, PHYSFS_ERR_OUT_OF_MEMORY, 0); - - if (sanitizePlatformIndependentPath(_fname, fname)) - { - int fileExists = 0; - DirHandle *i = NULL; - PHYSFS_Io *io = NULL; - - __PHYSFS_platformGrabMutex(stateLock); - - GOTO_IF_MACRO(!searchPath, PHYSFS_ERR_NO_SUCH_PATH, openReadEnd); - - for (i = searchPath; (i != NULL) && (!fileExists); i = i->next) - { - char *arcfname = fname; - if (verifyPath(i, &arcfname, 0)) - { - io = i->funcs->openRead(i->opaque, arcfname, &fileExists); - if (io) - break; - } /* if */ - } /* for */ - - GOTO_IF_MACRO(!io, ERRPASS, openReadEnd); - - fh = (FileHandle *) allocator.Malloc(sizeof (FileHandle)); - if (fh == NULL) - { - io->destroy(io); - GOTO_MACRO(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_MACRO_MUTEX(rc == -1, ERRPASS, stateLock, 0); - if (!rc) - { - rc = closeHandleInOpenList(&openWriteList, handle); - BAIL_IF_MACRO_MUTEX(rc == -1, ERRPASS, stateLock, 0); - } /* if */ - - __PHYSFS_platformReleaseMutex(stateLock); - BAIL_IF_MACRO(!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; - } /* else if */ - - 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; - fh->buffill = fh->bufpos = 0; - } /* if */ - - /* if you got here, the buffer is drained and we still need bytes. */ - assert(len > 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_MACRO(PHYSFS_ERR_INVALID_ARGUMENT, -1); - - BAIL_IF_MACRO(len > maxlen, PHYSFS_ERR_INVALID_ARGUMENT, -1); - BAIL_IF_MACRO(!fh->forReading, PHYSFS_ERR_OPEN_FOR_WRITING, -1); - BAIL_IF_MACRO(len == 0, ERRPASS, 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_MACRO(!PHYSFS_flush(handle), ERRPASS, -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_MACRO(PHYSFS_ERR_INVALID_ARGUMENT, -1); - - BAIL_IF_MACRO(len > maxlen, PHYSFS_ERR_INVALID_ARGUMENT, -1); - BAIL_IF_MACRO(fh->forReading, PHYSFS_ERR_OPEN_FOR_READING, -1); - BAIL_IF_MACRO(len == 0, ERRPASS, 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_MACRO(!PHYSFS_flush(handle), ERRPASS, 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_MACRO(_bufsize > 0xFFFFFFFF, "buffer must fit in 32-bits", 0);*/ - BAIL_IF_MACRO(_bufsize > 0xFFFFFFFF, PHYSFS_ERR_INVALID_ARGUMENT, 0); - bufsize = (PHYSFS_uint32) _bufsize; - - BAIL_IF_MACRO(!PHYSFS_flush(handle), ERRPASS, 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_MACRO(curpos == -1, ERRPASS, 0); - pos = ((curpos - fh->buffill) + fh->bufpos); - BAIL_IF_MACRO(!fh->io->seek(fh->io, pos), ERRPASS, 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_MACRO(!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_MACRO(rc <= 0, ERRPASS, 0); - fh->bufpos = fh->buffill = 0; - return io->flush(io); -} /* PHYSFS_flush */ - - -int PHYSFS_stat(const char *_fname, PHYSFS_Stat *stat) -{ - int retval = 0; - char *fname; - size_t len; - - BAIL_IF_MACRO(!_fname, PHYSFS_ERR_INVALID_ARGUMENT, -1); - BAIL_IF_MACRO(!stat, PHYSFS_ERR_INVALID_ARGUMENT, -1); - len = strlen(_fname) + 1; - fname = (char *) __PHYSFS_smallAlloc(len); - BAIL_IF_MACRO(!fname, PHYSFS_ERR_OUT_OF_MEMORY, -1); - - /* 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, &exists, stat); - } /* 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_MACRO(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_MACRO(!initialized, PHYSFS_ERR_NOT_INITIALIZED, NULL); - return &allocator; -} /* PHYSFS_getAllocator */ - - -static void *mallocAllocatorMalloc(PHYSFS_uint64 s) -{ - if (!__PHYSFS_ui64FitsAddressSpace(s)) - BAIL_MACRO(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_MACRO(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); - if (!__PHYSFS_platformSetDefaultAllocator(&allocator)) - { - allocator.Init = NULL; - allocator.Deinit = NULL; - allocator.Malloc = mallocAllocatorMalloc; - allocator.Realloc = mallocAllocatorRealloc; - allocator.Free = mallocAllocatorFree; - } /* if */ -} /* setDefaultAllocator */ - -/* end of physfs.c ... */ -