--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/physfs.c Fri Mar 27 15:10:42 2009 -0400
@@ -0,0 +1,2225 @@
+/**
+ * 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.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "physfs.h"
+
+#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__
+{
+ void *opaque; /* 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 */
+ const PHYSFS_Archiver *funcs; /* Ptr to archiver info for this handle. */
+ 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_ERRMSGTYPE__
+{
+ PHYSFS_uint64 tid;
+ int errorAvailable;
+ char errorString[80];
+ struct __PHYSFS_ERRMSGTYPE__ *next;
+} ErrMsg;
+
+
+/* The various i/o drivers...some of these may not be compiled in. */
+extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_ZIP;
+extern const PHYSFS_Archiver __PHYSFS_Archiver_ZIP;
+extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_LZMA;
+extern const PHYSFS_Archiver __PHYSFS_Archiver_LZMA;
+extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_GRP;
+extern const PHYSFS_Archiver __PHYSFS_Archiver_GRP;
+extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_QPAK;
+extern const PHYSFS_Archiver __PHYSFS_Archiver_QPAK;
+extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_HOG;
+extern const PHYSFS_Archiver __PHYSFS_Archiver_HOG;
+extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_MVL;
+extern const PHYSFS_Archiver __PHYSFS_Archiver_MVL;
+extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_WAD;
+extern const PHYSFS_Archiver __PHYSFS_Archiver_WAD;
+extern const PHYSFS_Archiver __PHYSFS_Archiver_DIR;
+
+
+static const PHYSFS_ArchiveInfo *supported_types[] =
+{
+#if (defined PHYSFS_SUPPORTS_ZIP)
+ &__PHYSFS_ArchiveInfo_ZIP,
+#endif
+#if (defined PHYSFS_SUPPORTS_7Z)
+ &__PHYSFS_ArchiveInfo_LZMA,
+#endif
+#if (defined PHYSFS_SUPPORTS_GRP)
+ &__PHYSFS_ArchiveInfo_GRP,
+#endif
+#if (defined PHYSFS_SUPPORTS_QPAK)
+ &__PHYSFS_ArchiveInfo_QPAK,
+#endif
+#if (defined PHYSFS_SUPPORTS_HOG)
+ &__PHYSFS_ArchiveInfo_HOG,
+#endif
+#if (defined PHYSFS_SUPPORTS_MVL)
+ &__PHYSFS_ArchiveInfo_MVL,
+#endif
+#if (defined PHYSFS_SUPPORTS_WAD)
+ &__PHYSFS_ArchiveInfo_WAD,
+#endif
+ NULL
+};
+
+static const PHYSFS_Archiver *archivers[] =
+{
+ &__PHYSFS_Archiver_DIR,
+#if (defined PHYSFS_SUPPORTS_ZIP)
+ &__PHYSFS_Archiver_ZIP,
+#endif
+#if (defined PHYSFS_SUPPORTS_7Z)
+ &__PHYSFS_Archiver_LZMA,
+#endif
+#if (defined PHYSFS_SUPPORTS_GRP)
+ &__PHYSFS_Archiver_GRP,
+#endif
+#if (defined PHYSFS_SUPPORTS_QPAK)
+ &__PHYSFS_Archiver_QPAK,
+#endif
+#if (defined PHYSFS_SUPPORTS_HOG)
+ &__PHYSFS_Archiver_HOG,
+#endif
+#if (defined PHYSFS_SUPPORTS_MVL)
+ &__PHYSFS_Archiver_MVL,
+#endif
+#if (defined PHYSFS_SUPPORTS_WAD)
+ &__PHYSFS_Archiver_WAD,
+#endif
+ NULL
+};
+
+
+
+/* General PhysicsFS state ... */
+static int initialized = 0;
+static ErrMsg *errorMessages = 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 int allowSymLinks = 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;
+
+
+/* functions ... */
+
+typedef struct
+{
+ char **list;
+ PHYSFS_uint32 size;
+ const char *errorstr;
+} EnumStringListCallbackData;
+
+static void enumStringListCallback(void *data, const char *str)
+{
+ void *ptr;
+ char *newstr;
+ EnumStringListCallbackData *pecd = (EnumStringListCallbackData *) data;
+
+ if (pecd->errorstr)
+ return;
+
+ 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->errorstr = ERR_OUT_OF_MEMORY;
+ pecd->list[pecd->size] = NULL;
+ PHYSFS_freeList(pecd->list);
+ return;
+ } /* if */
+
+ strcpy(newstr, str);
+ pecd->list[pecd->size] = newstr;
+ pecd->size++;
+} /* enumStringListCallback */
+
+
+static char **doEnumStringList(void (*func)(PHYSFS_StringCallback, void *))
+{
+ EnumStringListCallbackData ecd;
+ memset(&ecd, '\0', sizeof (ecd));
+ ecd.list = (char **) allocator.Malloc(sizeof (char *));
+ BAIL_IF_MACRO(ecd.list == NULL, ERR_OUT_OF_MEMORY, NULL);
+ func(enumStringListCallback, &ecd);
+ BAIL_IF_MACRO(ecd.errorstr != NULL, ecd.errorstr, NULL);
+ ecd.list[ecd.size] = NULL;
+ return(ecd.list);
+} /* doEnumStringList */
+
+
+static void __PHYSFS_bubble_sort(void *a, PHYSFS_uint32 lo, PHYSFS_uint32 hi,
+ int (*cmpfn)(void *, PHYSFS_uint32, PHYSFS_uint32),
+ void (*swapfn)(void *, PHYSFS_uint32, PHYSFS_uint32))
+{
+ PHYSFS_uint32 i;
+ int sorted;
+
+ do
+ {
+ sorted = 1;
+ for (i = lo; i < hi; i++)
+ {
+ if (cmpfn(a, i, i + 1) > 0)
+ {
+ swapfn(a, i, i + 1);
+ sorted = 0;
+ } /* if */
+ } /* for */
+ } while (!sorted);
+} /* __PHYSFS_bubble_sort */
+
+
+static void __PHYSFS_quick_sort(void *a, PHYSFS_uint32 lo, PHYSFS_uint32 hi,
+ int (*cmpfn)(void *, PHYSFS_uint32, PHYSFS_uint32),
+ void (*swapfn)(void *, PHYSFS_uint32, PHYSFS_uint32))
+{
+ PHYSFS_uint32 i;
+ PHYSFS_uint32 j;
+ PHYSFS_uint32 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, PHYSFS_uint32 max,
+ int (*cmpfn)(void *, PHYSFS_uint32, PHYSFS_uint32),
+ void (*swapfn)(void *, PHYSFS_uint32, PHYSFS_uint32))
+{
+ /*
+ * Quicksort w/ Bubblesort fallback algorithm inspired by code from here:
+ * http://www.cs.ubc.ca/spider/harrison/Java/sorting-demo.html
+ */
+ __PHYSFS_quick_sort(entries, 0, max - 1, cmpfn, swapfn);
+} /* __PHYSFS_sort */
+
+
+static ErrMsg *findErrorForCurrentThread(void)
+{
+ ErrMsg *i;
+ PHYSFS_uint64 tid;
+
+ if (errorLock != NULL)
+ __PHYSFS_platformGrabMutex(errorLock);
+
+ if (errorMessages != NULL)
+ {
+ tid = __PHYSFS_platformGetThreadID();
+
+ for (i = errorMessages; 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 char *str)
+{
+ ErrMsg *err;
+
+ if (str == NULL)
+ return;
+
+ err = findErrorForCurrentThread();
+
+ if (err == NULL)
+ {
+ err = (ErrMsg *) allocator.Malloc(sizeof (ErrMsg));
+ if (err == NULL)
+ return; /* uhh...? */
+
+ memset((void *) err, '\0', sizeof (ErrMsg));
+ err->tid = __PHYSFS_platformGetThreadID();
+
+ if (errorLock != NULL)
+ __PHYSFS_platformGrabMutex(errorLock);
+
+ err->next = errorMessages;
+ errorMessages = err;
+
+ if (errorLock != NULL)
+ __PHYSFS_platformReleaseMutex(errorLock);
+ } /* if */
+
+ err->errorAvailable = 1;
+ strncpy(err->errorString, str, sizeof (err->errorString));
+ err->errorString[sizeof (err->errorString) - 1] = '\0';
+} /* __PHYSFS_setError */
+
+
+const char *PHYSFS_getLastError(void)
+{
+ ErrMsg *err = findErrorForCurrentThread();
+
+ if ((err == NULL) || (!err->errorAvailable))
+ return(NULL);
+
+ err->errorAvailable = 0;
+ return(err->errorString);
+} /* PHYSFS_getLastError */
+
+
+/* MAKE SURE that errorLock is held before calling this! */
+static void freeErrorMessages(void)
+{
+ ErrMsg *i;
+ ErrMsg *next;
+
+ for (i = errorMessages; i != NULL; i = next)
+ {
+ next = i->next;
+ allocator.Free(i);
+ } /* for */
+
+ errorMessages = NULL;
+} /* freeErrorMessages */
+
+
+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 = strchr(fname, '.');
+ const char *p = retval;
+
+ while (p != NULL)
+ {
+ p = strchr(p + 1, '.');
+ if (p != NULL)
+ retval = p;
+ } /* while */
+
+ if (retval != NULL)
+ retval++; /* skip '.' */
+
+ return(retval);
+} /* find_filename_extension */
+
+
+static DirHandle *tryOpenDir(const PHYSFS_Archiver *funcs,
+ const char *d, int forWriting)
+{
+ DirHandle *retval = NULL;
+ if (funcs->isArchive(d, forWriting))
+ {
+ void *opaque = funcs->openArchive(d, forWriting);
+ if (opaque != NULL)
+ {
+ retval = (DirHandle *) allocator.Malloc(sizeof (DirHandle));
+ if (retval == NULL)
+ funcs->dirClose(opaque);
+ else
+ {
+ memset(retval, '\0', sizeof (DirHandle));
+ retval->mountPoint = NULL;
+ retval->funcs = funcs;
+ retval->opaque = opaque;
+ } /* else */
+ } /* if */
+ } /* if */
+
+ return(retval);
+} /* tryOpenDir */
+
+
+static DirHandle *openDirectory(const char *d, int forWriting)
+{
+ DirHandle *retval = NULL;
+ const PHYSFS_Archiver **i;
+ const char *ext;
+
+ BAIL_IF_MACRO(!__PHYSFS_platformExists(d), ERR_NO_SUCH_FILE, NULL);
+
+ 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(*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(*i, d, forWriting);
+ } /* for */
+ } /* if */
+
+ else /* no extension? Try them all. */
+ {
+ for (i = archivers; (*i != NULL) && (retval == NULL); i++)
+ retval = tryOpenDir(*i, d, forWriting);
+ } /* else */
+
+ BAIL_IF_MACRO(retval == NULL, ERR_UNSUPPORTED_ARCHIVE, 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(ERR_INSECURE_FNAME, 0);
+
+ if (ch == '/') /* path separator. */
+ {
+ *dst = '\0'; /* "." and ".." are illegal pathnames. */
+ if ((strcmp(prev, ".") == 0) || (strcmp(prev, "..") == 0))
+ BAIL_MACRO(ERR_INSECURE_FNAME, 0);
+
+ while (*src == '/') /* chop out doubles... */
+ src++;
+
+ if (*src == '\0') /* ends with a pathsep? */
+ break; /* we're done, don't add final pathsep to dst. */
+
+ prev = dst + 1;
+ } /* if */
+
+ *(dst++) = ch;
+ } while (ch != '\0');
+
+ 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(const char *newDir,
+ const char *mountPoint,
+ int forWriting)
+{
+ DirHandle *dirHandle = NULL;
+ char *tmpmntpnt = NULL;
+
+ GOTO_IF_MACRO(!newDir, ERR_INVALID_ARGUMENT, badDirHandle);
+ if (mountPoint != NULL)
+ {
+ const size_t len = strlen(mountPoint) + 1;
+ tmpmntpnt = (char *) __PHYSFS_smallAlloc(len);
+ GOTO_IF_MACRO(!tmpmntpnt, ERR_OUT_OF_MEMORY, badDirHandle);
+ if (!sanitizePlatformIndependentPath(mountPoint, tmpmntpnt))
+ goto badDirHandle;
+ mountPoint = tmpmntpnt; /* sanitized version. */
+ } /* if */
+
+ dirHandle = openDirectory(newDir, forWriting);
+ GOTO_IF_MACRO(!dirHandle, NULL, badDirHandle);
+
+ dirHandle->dirName = (char *) allocator.Malloc(strlen(newDir) + 1);
+ GOTO_IF_MACRO(!dirHandle->dirName, ERR_OUT_OF_MEMORY, badDirHandle);
+ strcpy(dirHandle->dirName, newDir);
+
+ if ((mountPoint != NULL) && (*mountPoint != '\0'))
+ {
+ dirHandle->mountPoint = (char *)allocator.Malloc(strlen(mountPoint)+2);
+ GOTO_IF_MACRO(!dirHandle->mountPoint, ERR_OUT_OF_MEMORY, badDirHandle);
+ strcpy(dirHandle->mountPoint, mountPoint);
+ strcat(dirHandle->mountPoint, "/");
+ } /* if */
+
+ __PHYSFS_smallFree(tmpmntpnt);
+ return(dirHandle);
+
+badDirHandle:
+ if (dirHandle != NULL)
+ {
+ dirHandle->funcs->dirClose(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, ERR_FILES_STILL_OPEN, 0);
+
+ dh->funcs->dirClose(dh->opaque);
+ allocator.Free(dh->dirName);
+ allocator.Free(dh->mountPoint);
+ allocator.Free(dh);
+ return(1);
+} /* freeDirHandle */
+
+
+static char *calculateUserDir(void)
+{
+ char *retval = NULL;
+ const char *str = NULL;
+
+ str = __PHYSFS_platformGetUserDir();
+ if (str != NULL)
+ retval = (char *) str;
+ else
+ {
+ const char *dirsep = PHYSFS_getDirSeparator();
+ const char *uname = __PHYSFS_platformGetUserName();
+
+ str = (uname != NULL) ? uname : "default";
+ retval = (char *) allocator.Malloc(strlen(baseDir) + strlen(str) +
+ strlen(dirsep) + 6);
+
+ if (retval == NULL)
+ __PHYSFS_setError(ERR_OUT_OF_MEMORY);
+ else
+ sprintf(retval, "%susers%s%s", baseDir, dirsep, str);
+
+ allocator.Free((void *) uname);
+ } /* else */
+
+ return(retval);
+} /* calculateUserDir */
+
+
+static int appendDirSep(char **dir)
+{
+ const char *dirsep = PHYSFS_getDirSeparator();
+ char *ptr;
+
+ if (strcmp((*dir + strlen(*dir)) - strlen(dirsep), dirsep) == 0)
+ return(1);
+
+ ptr = (char *) allocator.Realloc(*dir, strlen(*dir) + strlen(dirsep) + 1);
+ if (!ptr)
+ {
+ allocator.Free(*dir);
+ return(0);
+ } /* if */
+
+ strcat(ptr, dirsep);
+ *dir = ptr;
+ return(1);
+} /* appendDirSep */
+
+
+static char *calculateBaseDir(const char *argv0)
+{
+ char *retval = NULL;
+ const char *dirsep = 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, ERR_ARGV0_IS_NULL, NULL);
+
+ dirsep = PHYSFS_getDirSeparator();
+ if (strlen(dirsep) == 1) /* fast path. */
+ ptr = strrchr(argv0, *dirsep);
+ else
+ {
+ ptr = strstr(argv0, dirsep);
+ if (ptr != NULL)
+ {
+ char *p = ptr;
+ while (p != NULL)
+ {
+ ptr = p;
+ p = strstr(p + 1, dirsep);
+ } /* while */
+ } /* if */
+ } /* else */
+
+ if (ptr != NULL)
+ {
+ size_t size = (size_t) (ptr - argv0);
+ retval = (char *) allocator.Malloc(size + 1);
+ BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
+ memcpy(retval, argv0, size);
+ retval[size] = '\0';
+ return(retval);
+ } /* if */
+
+ /* argv0 wasn't helpful. */
+ BAIL_MACRO(ERR_INVALID_ARGUMENT, NULL);
+ return(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);
+
+int PHYSFS_init(const char *argv0)
+{
+ char *ptr;
+
+ BAIL_IF_MACRO(initialized, ERR_IS_INITIALIZED, 0);
+
+ if (!externalAllocator)
+ setDefaultAllocator();
+
+ if (allocator.Init != NULL)
+ BAIL_IF_MACRO(!allocator.Init(), NULL, 0);
+
+ BAIL_IF_MACRO(!__PHYSFS_platformInit(), NULL, 0);
+
+ BAIL_IF_MACRO(!initializeMutexes(), NULL, 0);
+
+ baseDir = calculateBaseDir(argv0);
+ BAIL_IF_MACRO(baseDir == NULL, NULL, 0);
+
+ /* !!! FIXME: only call this if we got this from argv0 (unreliable). */
+ ptr = __PHYSFS_platformRealPath(baseDir);
+ allocator.Free(baseDir);
+ BAIL_IF_MACRO(ptr == NULL, NULL, 0);
+ baseDir = ptr;
+
+ BAIL_IF_MACRO(!appendDirSep(&baseDir), NULL, 0);
+
+ userDir = calculateUserDir();
+ if (userDir != NULL)
+ {
+ ptr = __PHYSFS_platformRealPath(userDir);
+ allocator.Free(userDir);
+ userDir = ptr;
+ } /* if */
+
+ if ((userDir == NULL) || (!appendDirSep(&userDir)))
+ {
+ allocator.Free(baseDir);
+ baseDir = NULL;
+ return(0);
+ } /* if */
+
+ initialized = 1;
+
+ /* This makes sure that the error subsystem is initialized. */
+ __PHYSFS_setError(PHYSFS_getLastError());
+
+ return(1);
+} /* 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)
+ {
+ next = i->next;
+ if (!i->funcs->fileClose(i->opaque))
+ {
+ *list = i;
+ return(0);
+ } /* if */
+
+ 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 */
+
+
+int PHYSFS_deinit(void)
+{
+ BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0);
+ BAIL_IF_MACRO(!__PHYSFS_platformDeinit(), NULL, 0);
+
+ closeFileHandleList(&openWriteList);
+ BAIL_IF_MACRO(!PHYSFS_setWriteDir(NULL), ERR_FILES_STILL_OPEN, 0);
+
+ freeSearchPath();
+ freeErrorMessages();
+
+ if (baseDir != NULL)
+ {
+ allocator.Free(baseDir);
+ baseDir = NULL;
+ } /* if */
+
+ if (userDir != NULL)
+ {
+ allocator.Free(userDir);
+ userDir = NULL;
+ } /* if */
+
+ allowSymLinks = 0;
+ initialized = 0;
+
+ __PHYSFS_platformDestroyMutex(errorLock);
+ __PHYSFS_platformDestroyMutex(stateLock);
+
+ if (allocator.Deinit != NULL)
+ allocator.Deinit();
+
+ errorLock = stateLock = NULL;
+ return(1);
+} /* PHYSFS_deinit */
+
+
+int PHYSFS_isInit(void)
+{
+ return(initialized);
+} /* PHYSFS_isInit */
+
+
+const PHYSFS_ArchiveInfo **PHYSFS_supportedArchiveTypes(void)
+{
+ return(supported_types);
+} /* PHYSFS_supportedArchiveTypes */
+
+
+void PHYSFS_freeList(void *list)
+{
+ void **i;
+ for (i = (void **) list; *i != NULL; i++)
+ allocator.Free(*i);
+
+ allocator.Free(list);
+} /* PHYSFS_freeList */
+
+
+const char *PHYSFS_getDirSeparator(void)
+{
+ return(__PHYSFS_platformDirSeparator);
+} /* 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_getBaseDir(void)
+{
+ return(baseDir); /* this is calculated in PHYSFS_init()... */
+} /* PHYSFS_getBaseDir */
+
+
+const char *PHYSFS_getUserDir(void)
+{
+ return(userDir); /* this is calculated in PHYSFS_init()... */
+} /* 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), NULL,
+ stateLock, 0);
+ writeDir = NULL;
+ } /* if */
+
+ if (newDir != NULL)
+ {
+ writeDir = createDirHandle(newDir, NULL, 1);
+ retval = (writeDir != NULL);
+ } /* if */
+
+ __PHYSFS_platformReleaseMutex(stateLock);
+
+ return(retval);
+} /* PHYSFS_setWriteDir */
+
+
+int PHYSFS_mount(const char *newDir, const char *mountPoint, int appendToPath)
+{
+ DirHandle *dh;
+ DirHandle *prev = NULL;
+ DirHandle *i;
+
+ BAIL_IF_MACRO(newDir == NULL, ERR_INVALID_ARGUMENT, 0);
+
+ if (mountPoint == NULL)
+ mountPoint = "/";
+
+ __PHYSFS_platformGrabMutex(stateLock);
+
+ for (i = searchPath; i != NULL; i = i->next)
+ {
+ /* already in search path? */
+ BAIL_IF_MACRO_MUTEX(strcmp(newDir, i->dirName)==0, NULL, stateLock, 1);
+ prev = i;
+ } /* for */
+
+ dh = createDirHandle(newDir, mountPoint, 0);
+ BAIL_IF_MACRO_MUTEX(dh == NULL, NULL, 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);
+} /* PHYSFS_mount */
+
+
+int PHYSFS_addToSearchPath(const char *newDir, int appendToPath)
+{
+ return(PHYSFS_mount(newDir, NULL, appendToPath));
+} /* PHYSFS_addToSearchPath */
+
+
+int PHYSFS_removeFromSearchPath(const char *oldDir)
+{
+ DirHandle *i;
+ DirHandle *prev = NULL;
+ DirHandle *next = NULL;
+
+ BAIL_IF_MACRO(oldDir == NULL, 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), NULL,
+ stateLock, 0);
+
+ if (prev == NULL)
+ searchPath = next;
+ else
+ prev->next = next;
+
+ BAIL_MACRO_MUTEX(NULL, stateLock, 1);
+ } /* if */
+ prev = i;
+ } /* for */
+
+ BAIL_MACRO_MUTEX(ERR_NOT_IN_SEARCH_PATH, stateLock, 0);
+} /* PHYSFS_removeFromSearchPath */
+
+
+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(ERR_NOT_IN_SEARCH_PATH, 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_addToSearchPath(str, 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 *basedir = PHYSFS_getBaseDir();
+ const char *userdir = PHYSFS_getUserDir();
+ const char *dirsep = PHYSFS_getDirSeparator();
+ PHYSFS_uint64 len = 0;
+ char *str = NULL;
+
+ BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0);
+
+ /* set write dir... */
+ len = (strlen(userdir) + (strlen(organization) * 2) +
+ (strlen(appName) * 2) + (strlen(dirsep) * 3) + 2);
+
+ str = (char *) __PHYSFS_smallAlloc(len);
+
+ BAIL_IF_MACRO(str == NULL, ERR_OUT_OF_MEMORY, 0);
+ sprintf(str, "%s.%s%s%s", userdir, organization, dirsep, appName);
+
+ if (!PHYSFS_setWriteDir(str))
+ {
+ int no_write = 0;
+ sprintf(str, ".%s/%s", organization, appName);
+ if ( (PHYSFS_setWriteDir(userdir)) &&
+ (PHYSFS_mkdir(str)) )
+ {
+ sprintf(str, "%s.%s%s%s", userdir, organization, dirsep, appName);
+ if (!PHYSFS_setWriteDir(str))
+ no_write = 1;
+ } /* if */
+ else
+ {
+ no_write = 1;
+ } /* else */
+
+ if (no_write)
+ {
+ PHYSFS_setWriteDir(NULL); /* just in case. */
+ __PHYSFS_smallFree(str);
+ BAIL_MACRO(ERR_CANT_SET_WRITE_DIR, 0);
+ } /* if */
+ } /* if */
+
+ /* Put write dir first in search path... */
+ PHYSFS_addToSearchPath(str, 0);
+ __PHYSFS_smallFree(str);
+
+ /* Put base path on search path... */
+ PHYSFS_addToSearchPath(basedir, 1);
+
+ /* handle CD-ROMs... */
+ if (includeCdRoms)
+ {
+ char **cds = PHYSFS_getCdRomDirs();
+ char **i;
+ for (i = cds; *i != NULL; i++)
+ PHYSFS_addToSearchPath(*i, 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 */
+
+
+/* string manipulation in C makes my ass itch. */
+char *__PHYSFS_convertToDependent(const char *prepend,
+ const char *dirName,
+ const char *append)
+{
+ const char *dirsep = __PHYSFS_platformDirSeparator;
+ size_t sepsize = strlen(dirsep);
+ char *str;
+ char *i1;
+ char *i2;
+ size_t allocSize;
+
+ while (*dirName == '/') /* !!! FIXME: pass through sanitize function. */
+ dirName++;
+
+ allocSize = strlen(dirName) + 1;
+ if (prepend != NULL)
+ allocSize += strlen(prepend) + sepsize;
+ if (append != NULL)
+ allocSize += strlen(append) + sepsize;
+
+ /* make sure there's enough space if the dir separator is bigger. */
+ if (sepsize > 1)
+ {
+ str = (char *) dirName;
+ do
+ {
+ str = strchr(str, '/');
+ if (str != NULL)
+ {
+ allocSize += (sepsize - 1);
+ str++;
+ } /* if */
+ } while (str != NULL);
+ } /* if */
+
+ str = (char *) allocator.Malloc(allocSize);
+ BAIL_IF_MACRO(str == NULL, ERR_OUT_OF_MEMORY, NULL);
+
+ if (prepend == NULL)
+ *str = '\0';
+ else
+ {
+ strcpy(str, prepend);
+ strcat(str, dirsep);
+ } /* else */
+
+ for (i1 = (char *) dirName, i2 = str + strlen(str); *i1; i1++, i2++)
+ {
+ if (*i1 == '/')
+ {
+ strcpy(i2, dirsep);
+ i2 += sepsize;
+ } /* if */
+ else
+ {
+ *i2 = *i1;
+ } /* else */
+ } /* for */
+ *i2 = '\0';
+
+ if (append)
+ {
+ strcat(str, dirsep);
+ strcat(str, append);
+ } /* if */
+
+ return(str);
+} /* __PHYSFS_convertToDependent */
+
+
+/*
+ * 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, ERR_NO_SUCH_PATH, 0);
+ /* !!! FIXME: Case insensitive? */
+ retval = strncmp(h->mountPoint, fname, mntpntlen-1);
+ BAIL_IF_MACRO(retval != 0, ERR_NO_SUCH_PATH, 0);
+ if (len > mntpntlen-1) /* corner case... */
+ BAIL_IF_MACRO(fname[mntpntlen-1] != '/', 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)
+ {
+ int rc = 0;
+ end = strchr(start, '/');
+
+ if (end != NULL) *end = '\0';
+ rc = h->funcs->isSymLink(h->opaque, fname, &retval);
+ if (end != NULL) *end = '/';
+
+ BAIL_IF_MACRO(rc, ERR_SYMLINK_DISALLOWED, 0); /* insecure. */
+
+ /* 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), NULL, 0);
+
+ __PHYSFS_platformGrabMutex(stateLock);
+ BAIL_IF_MACRO_MUTEX(writeDir == NULL, ERR_NO_WRITE_DIR, stateLock, 0);
+ h = writeDir;
+ BAIL_IF_MACRO_MUTEX(!verifyPath(h, &dname, 1), NULL, 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)
+ retval = h->funcs->isDirectory(h->opaque, dname, &exists);
+
+ 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 == NULL, ERR_INVALID_ARGUMENT, 0);
+ len = strlen(_dname) + 1;
+ dname = (char *) __PHYSFS_smallAlloc(len);
+ BAIL_IF_MACRO(dname == NULL, 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), NULL, 0);
+
+ __PHYSFS_platformGrabMutex(stateLock);
+
+ BAIL_IF_MACRO_MUTEX(writeDir == NULL, ERR_NO_WRITE_DIR, stateLock, 0);
+ h = writeDir;
+ BAIL_IF_MACRO_MUTEX(!verifyPath(h, &fname, 0), NULL, 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 == NULL, ERR_INVALID_ARGUMENT, 0);
+ len = strlen(_fname) + 1;
+ fname = (char *) __PHYSFS_smallAlloc(len);
+ BAIL_IF_MACRO(fname == NULL, 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 == NULL, ERR_INVALID_ARGUMENT, NULL);
+ len = strlen(_fname) + 1;
+ fname = __PHYSFS_smallAlloc(len);
+ BAIL_IF_MACRO(fname == NULL, ERR_OUT_OF_MEMORY, NULL);
+ if (sanitizePlatformIndependentPath(_fname, fname))
+ {
+ DirHandle *i;
+ __PHYSFS_platformGrabMutex(stateLock);
+ for (i = searchPath; ((i != NULL) && (retval == NULL)); i = i->next)
+ {
+ char *arcfname = fname;
+ if (partOfMountPoint(i, arcfname))
+ retval = i->dirName;
+ else if (verifyPath(i, &arcfname, 0))
+ {
+ if (i->funcs->exists(i->opaque, arcfname))
+ retval = i->dirName;
+ } /* 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 == NULL, 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 == NULL, ERR_INVALID_ARGUMENT, ) /*0*/;
+ BAIL_IF_MACRO(callback == NULL, ERR_INVALID_ARGUMENT, ) /*0*/;
+
+ len = strlen(_fname) + 1;
+ fname = (char *) __PHYSFS_smallAlloc(len);
+ BAIL_IF_MACRO(fname == NULL, 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_sint64 retval = -1;
+ char *fname;
+ size_t len;
+
+ BAIL_IF_MACRO(_fname == NULL, ERR_INVALID_ARGUMENT, -1);
+ len = strlen(_fname) + 1;
+ fname = (char *) __PHYSFS_smallAlloc(len);
+ BAIL_IF_MACRO(fname == NULL, ERR_OUT_OF_MEMORY, -1);
+
+ if (sanitizePlatformIndependentPath(_fname, fname))
+ {
+ if (*fname == '\0') /* eh...punt if it's the root dir. */
+ retval = 1; /* !!! FIXME: Maybe this should be an error? */
+ 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)
+ retval = 1; /* !!! FIXME: What's the right value? */
+ else if (verifyPath(i, &arcfname, 0))
+ {
+ retval = i->funcs->getLastModTime(i->opaque, arcfname,
+ &exists);
+ } /* else if */
+ } /* for */
+ __PHYSFS_platformReleaseMutex(stateLock);
+ } /* else */
+ } /* if */
+
+ __PHYSFS_smallFree(fname);
+ return(retval);
+} /* PHYSFS_getLastModTime */
+
+
+int PHYSFS_isDirectory(const char *_fname)
+{
+ int retval = 0;
+ size_t len;
+ char *fname;
+
+ BAIL_IF_MACRO(_fname == NULL, ERR_INVALID_ARGUMENT, 0);
+ len = strlen(_fname) + 1;
+ fname = (char *) __PHYSFS_smallAlloc(len);
+ BAIL_IF_MACRO(fname == NULL, ERR_OUT_OF_MEMORY, 0);
+
+ if (!sanitizePlatformIndependentPath(_fname, fname))
+ retval = 0;
+
+ else if (*fname == '\0')
+ retval = 1; /* Root is always a dir. :) */
+
+ else
+ {
+ DirHandle *i;
+ int exists = 0;
+
+ __PHYSFS_platformGrabMutex(stateLock);
+ for (i = searchPath; ((i != NULL) && (!exists)); i = i->next)
+ {
+ char *arcfname = fname;
+ if ((exists = partOfMountPoint(i, arcfname)) != 0)
+ retval = 1;
+ else if (verifyPath(i, &arcfname, 0))
+ retval = i->funcs->isDirectory(i->opaque, arcfname, &exists);
+ } /* for */
+ __PHYSFS_platformReleaseMutex(stateLock);
+ } /* else */
+
+ __PHYSFS_smallFree(fname);
+ return(retval);
+} /* PHYSFS_isDirectory */
+
+
+int PHYSFS_isSymbolicLink(const char *_fname)
+{
+ int retval = 0;
+ size_t len;
+ char *fname;
+
+ BAIL_IF_MACRO(!allowSymLinks, ERR_SYMLINK_DISALLOWED, 0);
+
+ BAIL_IF_MACRO(_fname == NULL, ERR_INVALID_ARGUMENT, 0);
+ len = strlen(_fname) + 1;
+ fname = (char *) __PHYSFS_smallAlloc(len);
+ BAIL_IF_MACRO(fname == NULL, ERR_OUT_OF_MEMORY, 0);
+
+ if (!sanitizePlatformIndependentPath(_fname, fname))
+ retval = 0;
+
+ else if (*fname == '\0')
+ retval = 1; /* Root is never a symlink. */
+
+ else
+ {
+ DirHandle *i;
+ int fileExists = 0;
+
+ __PHYSFS_platformGrabMutex(stateLock);
+ for (i = searchPath; ((i != NULL) && (!fileExists)); i = i->next)
+ {
+ char *arcfname = fname;
+ if ((fileExists = partOfMountPoint(i, arcfname)) != 0)
+ retval = 0; /* virtual dir...not a symlink. */
+ else if (verifyPath(i, &arcfname, 0))
+ retval = i->funcs->isSymLink(i->opaque, arcfname, &fileExists);
+ } /* for */
+ __PHYSFS_platformReleaseMutex(stateLock);
+ } /* else */
+
+ __PHYSFS_smallFree(fname);
+ return(retval);
+} /* PHYSFS_isSymbolicLink */
+
+
+static PHYSFS_File *doOpenWrite(const char *_fname, int appending)
+{
+ FileHandle *fh = NULL;
+ size_t len;
+ char *fname;
+
+ BAIL_IF_MACRO(_fname == NULL, ERR_INVALID_ARGUMENT, 0);
+ len = strlen(_fname) + 1;
+ fname = (char *) __PHYSFS_smallAlloc(len);
+ BAIL_IF_MACRO(fname == NULL, ERR_OUT_OF_MEMORY, 0);
+
+ if (sanitizePlatformIndependentPath(_fname, fname))
+ {
+ void *opaque = NULL;
+ DirHandle *h = NULL;
+ const PHYSFS_Archiver *f;
+
+ __PHYSFS_platformGrabMutex(stateLock);
+
+ GOTO_IF_MACRO(!writeDir, ERR_NO_WRITE_DIR, doOpenWriteEnd);
+
+ h = writeDir;
+ GOTO_IF_MACRO(!verifyPath(h, &fname, 0), NULL, doOpenWriteEnd);
+
+ f = h->funcs;
+ if (appending)
+ opaque = f->openAppend(h->opaque, fname);
+ else
+ opaque = f->openWrite(h->opaque, fname);
+
+ GOTO_IF_MACRO(opaque == NULL, NULL, doOpenWriteEnd);
+
+ fh = (FileHandle *) allocator.Malloc(sizeof (FileHandle));
+ if (fh == NULL)
+ {
+ f->fileClose(opaque);
+ GOTO_MACRO(ERR_OUT_OF_MEMORY, doOpenWriteEnd);
+ } /* if */
+ else
+ {
+ memset(fh, '\0', sizeof (FileHandle));
+ fh->opaque = opaque;
+ fh->dirHandle = h;
+ fh->funcs = h->funcs;
+ 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 == NULL, ERR_INVALID_ARGUMENT, 0);
+ len = strlen(_fname) + 1;
+ fname = (char *) __PHYSFS_smallAlloc(len);
+ BAIL_IF_MACRO(fname == NULL, ERR_OUT_OF_MEMORY, 0);
+
+ if (sanitizePlatformIndependentPath(_fname, fname))
+ {
+ int fileExists = 0;
+ DirHandle *i = NULL;
+ fvoid *opaque = NULL;
+
+ __PHYSFS_platformGrabMutex(stateLock);
+
+ GOTO_IF_MACRO(!searchPath, ERR_NO_SUCH_PATH, openReadEnd);
+
+ /* !!! FIXME: Why aren't we using a for loop here? */
+ i = searchPath;
+
+ do
+ {
+ char *arcfname = fname;
+ if (verifyPath(i, &arcfname, 0))
+ {
+ opaque = i->funcs->openRead(i->opaque, arcfname, &fileExists);
+ if (opaque)
+ break;
+ } /* if */
+ i = i->next;
+ } while ((i != NULL) && (!fileExists));
+
+ /* !!! FIXME: may not set an error if openRead didn't fail. */
+ GOTO_IF_MACRO(opaque == NULL, NULL, openReadEnd);
+
+ fh = (FileHandle *) allocator.Malloc(sizeof (FileHandle));
+ if (fh == NULL)
+ {
+ i->funcs->fileClose(opaque);
+ GOTO_MACRO(ERR_OUT_OF_MEMORY, openReadEnd);
+ } /* if */
+
+ memset(fh, '\0', sizeof (FileHandle));
+ fh->opaque = opaque;
+ fh->forReading = 1;
+ fh->dirHandle = i;
+ fh->funcs = i->funcs;
+ 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_uint8 *tmp = handle->buffer;
+ rc = PHYSFS_flush((PHYSFS_File *) handle);
+ if (rc)
+ rc = handle->funcs->fileClose(handle->opaque);
+ if (!rc)
+ return(-1);
+
+ 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, NULL, stateLock, 0);
+ if (!rc)
+ {
+ rc = closeHandleInOpenList(&openWriteList, handle);
+ BAIL_IF_MACRO_MUTEX(rc == -1, NULL, stateLock, 0);
+ } /* if */
+
+ __PHYSFS_platformReleaseMutex(stateLock);
+ BAIL_IF_MACRO(!rc, ERR_NOT_A_HANDLE, 0);
+ return(1);
+} /* PHYSFS_close */
+
+
+static PHYSFS_sint64 doBufferedRead(FileHandle *fh, void *buffer,
+ PHYSFS_uint32 objSize,
+ PHYSFS_uint32 objCount)
+{
+ PHYSFS_sint64 retval = 0;
+ PHYSFS_uint32 remainder = 0;
+
+ while (objCount > 0)
+ {
+ PHYSFS_uint32 buffered = fh->buffill - fh->bufpos;
+ PHYSFS_uint64 mustread = (objSize * objCount) - remainder;
+ PHYSFS_uint32 copied;
+
+ if (buffered == 0) /* need to refill buffer? */
+ {
+ PHYSFS_sint64 rc = fh->funcs->read(fh->opaque, fh->buffer,
+ 1, fh->bufsize);
+ if (rc <= 0)
+ {
+ fh->bufpos -= remainder;
+ return(((rc == -1) && (retval == 0)) ? -1 : retval);
+ } /* if */
+
+ buffered = fh->buffill = (PHYSFS_uint32) rc;
+ fh->bufpos = 0;
+ } /* if */
+
+ if (buffered > mustread)
+ buffered = (PHYSFS_uint32) mustread;
+
+ memcpy(buffer, fh->buffer + fh->bufpos, (size_t) buffered);
+ buffer = ((PHYSFS_uint8 *) buffer) + buffered;
+ fh->bufpos += buffered;
+ buffered += remainder; /* take remainder into account. */
+ copied = (buffered / objSize);
+ remainder = (buffered % objSize);
+ retval += copied;
+ objCount -= copied;
+ } /* while */
+
+ return(retval);
+} /* doBufferedRead */
+
+
+PHYSFS_sint64 PHYSFS_read(PHYSFS_File *handle, void *buffer,
+ PHYSFS_uint32 objSize, PHYSFS_uint32 objCount)
+{
+ FileHandle *fh = (FileHandle *) handle;
+
+ BAIL_IF_MACRO(!fh->forReading, ERR_FILE_ALREADY_OPEN_W, -1);
+ BAIL_IF_MACRO(objSize == 0, NULL, 0);
+ BAIL_IF_MACRO(objCount == 0, NULL, 0);
+ if (fh->buffer != NULL)
+ return(doBufferedRead(fh, buffer, objSize, objCount));
+
+ return(fh->funcs->read(fh->opaque, buffer, objSize, objCount));
+} /* PHYSFS_read */
+
+
+static PHYSFS_sint64 doBufferedWrite(PHYSFS_File *handle, const void *buffer,
+ PHYSFS_uint32 objSize,
+ PHYSFS_uint32 objCount)
+{
+ FileHandle *fh = (FileHandle *) handle;
+
+ /* whole thing fits in the buffer? */
+ if (fh->buffill + (objSize * objCount) < fh->bufsize)
+ {
+ memcpy(fh->buffer + fh->buffill, buffer, objSize * objCount);
+ fh->buffill += (objSize * objCount);
+ return(objCount);
+ } /* if */
+
+ /* would overflow buffer. Flush and then write the new objects, too. */
+ BAIL_IF_MACRO(!PHYSFS_flush(handle), NULL, -1);
+ return(fh->funcs->write(fh->opaque, buffer, objSize, objCount));
+} /* doBufferedWrite */
+
+
+PHYSFS_sint64 PHYSFS_write(PHYSFS_File *handle, const void *buffer,
+ PHYSFS_uint32 objSize, PHYSFS_uint32 objCount)
+{
+ FileHandle *fh = (FileHandle *) handle;
+
+ BAIL_IF_MACRO(fh->forReading, ERR_FILE_ALREADY_OPEN_R, -1);
+ BAIL_IF_MACRO(objSize == 0, NULL, 0);
+ BAIL_IF_MACRO(objCount == 0, NULL, 0);
+ if (fh->buffer != NULL)
+ return(doBufferedWrite(handle, buffer, objSize, objCount));
+
+ return(fh->funcs->write(fh->opaque, buffer, objSize, objCount));
+} /* 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);
+
+ /* eof if buffer is empty and archiver says so. */
+ return((fh->bufpos == fh->buffill) && (fh->funcs->eof(fh->opaque)));
+} /* PHYSFS_eof */
+
+
+PHYSFS_sint64 PHYSFS_tell(PHYSFS_File *handle)
+{
+ FileHandle *fh = (FileHandle *) handle;
+ PHYSFS_sint64 pos = fh->funcs->tell(fh->opaque);
+ 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), NULL, 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->funcs->seek(fh->opaque, pos));
+} /* PHYSFS_seek */
+
+
+PHYSFS_sint64 PHYSFS_fileLength(PHYSFS_File *handle)
+{
+ FileHandle *fh = (FileHandle *) handle;
+ return(fh->funcs->fileLength(fh->opaque));
+} /* PHYSFS_filelength */
+
+
+int PHYSFS_setBuffer(PHYSFS_File *handle, PHYSFS_uint64 _bufsize)
+{
+ FileHandle *fh = (FileHandle *) handle;
+ PHYSFS_uint32 bufsize;
+
+ /* !!! FIXME: Unlocalized string. */
+ BAIL_IF_MACRO(_bufsize > 0xFFFFFFFF, "buffer must fit in 32-bits", 0);
+ bufsize = (PHYSFS_uint32) _bufsize;
+
+ BAIL_IF_MACRO(!PHYSFS_flush(handle), NULL, 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;
+ PHYSFS_sint64 curpos = fh->funcs->tell(fh->opaque);
+ BAIL_IF_MACRO(curpos == -1, NULL, 0);
+ pos = ((curpos - fh->buffill) + fh->bufpos);
+ BAIL_IF_MACRO(!fh->funcs->seek(fh->opaque, pos), NULL, 0);
+ } /* if */
+
+ if (bufsize == 0) /* delete existing buffer. */
+ {
+ if (fh->buffer != NULL)
+ {
+ 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 == NULL, 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_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. */
+ rc = fh->funcs->write(fh->opaque, fh->buffer + fh->bufpos,
+ fh->buffill - fh->bufpos, 1);
+ BAIL_IF_MACRO(rc <= 0, NULL, 0);
+ fh->bufpos = fh->buffill = 0;
+ return(1);
+} /* PHYSFS_flush */
+
+
+int PHYSFS_setAllocator(const PHYSFS_Allocator *a)
+{
+ BAIL_IF_MACRO(initialized, ERR_IS_INITIALIZED, 0);
+ externalAllocator = (a != NULL);
+ if (externalAllocator)
+ memcpy(&allocator, a, sizeof (PHYSFS_Allocator));
+
+ return(1);
+} /* PHYSFS_setAllocator */
+
+
+static void *mallocAllocatorMalloc(PHYSFS_uint64 s)
+{
+ BAIL_IF_MACRO(__PHYSFS_ui64FitsAddressSpace(s), ERR_OUT_OF_MEMORY, NULL);
+ #undef malloc
+ return(malloc((size_t) s));
+} /* mallocAllocatorMalloc */
+
+
+static void *mallocAllocatorRealloc(void *ptr, PHYSFS_uint64 s)
+{
+ BAIL_IF_MACRO(__PHYSFS_ui64FitsAddressSpace(s), 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 */
+
+
+void *__PHYSFS_initSmallAlloc(void *ptr, PHYSFS_uint64 len)
+{
+ const char useHeap = ((ptr == NULL) ? 1 : 0);
+ if (useHeap) /* too large for stack allocation or alloca() failed. */
+ ptr = allocator.Malloc(len+1);
+
+ if (ptr != NULL)
+ {
+ char *retval = (char *) 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)
+ {
+ char *block = ((char *) ptr) - 1;
+ const char useHeap = *block;
+ if (useHeap)
+ allocator.Free(block);
+ /*printf("%s free'd (%p).\n", useHeap ? "heap" : "stack", block);*/
+ } /* if */
+} /* __PHYSFS_smallFree */
+
+/* end of physfs.c ... */
+