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physfs/physfs.c

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/**
* PhysicsFS; a portable, flexible file i/o abstraction.
*
* Documentation is in physfs.h. It's verbose, honest. :)
*
* Please see the file LICENSE in the source's root directory.
*
* This file written by Ryan C. Gordon.
*/
#if HAVE_CONFIG_H
# include <config.h>
#endif
#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... */
#if (defined PHYSFS_SUPPORTS_ZIP)
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_ZIP;
extern const PHYSFS_Archiver __PHYSFS_Archiver_ZIP;
#endif
#if (defined PHYSFS_SUPPORTS_GRP)
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_GRP;
extern const PHYSFS_Archiver __PHYSFS_Archiver_GRP;
#endif
#if (defined PHYSFS_SUPPORTS_QPAK)
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_QPAK;
extern const PHYSFS_Archiver __PHYSFS_Archiver_QPAK;
#endif
#if (defined PHYSFS_SUPPORTS_HOG)
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_HOG;
extern const PHYSFS_Archiver __PHYSFS_Archiver_HOG;
#endif
#if (defined PHYSFS_SUPPORTS_MVL)
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_MVL;
extern const PHYSFS_Archiver __PHYSFS_Archiver_MVL;
#endif
#if (defined PHYSFS_SUPPORTS_WAD)
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_WAD;
extern const PHYSFS_Archiver __PHYSFS_Archiver_WAD;
#endif
#if (defined PHYSFS_SUPPORTS_MIX)
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_MIX;
extern const PHYSFS_Archiver __PHYSFS_Archiver_MIX;
#endif
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_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
#if (defined PHYSFS_SUPPORTS_MIX)
&__PHYSFS_ArchiveInfo_MIX,
#endif
NULL
};
static const PHYSFS_Archiver *archivers[] =
{
#if (defined PHYSFS_SUPPORTS_ZIP)
&__PHYSFS_Archiver_ZIP,
#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
#if (defined PHYSFS_SUPPORTS_MIX)
&__PHYSFS_Archiver_MIX,
#endif
&__PHYSFS_Archiver_DIR,
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;
static 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 = realloc(pecd->list, (pecd->size + 2) * sizeof (char *));
newstr = 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 **) 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 */
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 *) 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;
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_platformStricmp(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_platformStricmp(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 */
static DirHandle *createDirHandle(const char *newDir,
const char *mountPoint,
int forWriting)
{
DirHandle *dirHandle = NULL;
GOTO_IF_MACRO(!newDir, ERR_INVALID_ARGUMENT, badDirHandle);
if (mountPoint != NULL)
{
char *mntpnt = (char *) alloca(strlen(mountPoint) + 1);
GOTO_IF_MACRO(!mntpnt, ERR_OUT_OF_MEMORY, badDirHandle);
if (!sanitizePlatformIndependentPath(mountPoint, mntpnt))
goto badDirHandle;
mountPoint = mntpnt; /* sanitized version. */
} /* if */
dirHandle = openDirectory(newDir, forWriting);
GOTO_IF_MACRO(!dirHandle, NULL, badDirHandle);
dirHandle->dirName = (char *) 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 *) malloc(strlen(mountPoint) + 2);
GOTO_IF_MACRO(!dirHandle->mountPoint, ERR_OUT_OF_MEMORY, badDirHandle);
strcpy(dirHandle->mountPoint, mountPoint);
strcat(dirHandle->mountPoint, "/");
} /* if */
return(dirHandle);
badDirHandle:
if (dirHandle != NULL)
{
dirHandle->funcs->dirClose(dirHandle->opaque);
free(dirHandle->dirName);
free(dirHandle->mountPoint);
free(dirHandle);
} /* if */
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);
free(dh->dirName);
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 *) 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);
if (uname != NULL)
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 = realloc(*dir, strlen(*dir) + strlen(dirsep) + 1);
if (!ptr)
{
free(*dir);
return(0);
} /* if */
strcat(ptr, dirsep);
*dir = ptr;
return(1);
} /* appendDirSep */
static char *calculateBaseDir(const char *argv0)
{
const char *dirsep = PHYSFS_getDirSeparator();
char *retval;
char *ptr;
/*
* See if the platform driver wants to handle this for us...
*/
retval = __PHYSFS_platformCalcBaseDir(argv0);
if (retval != NULL)
return(retval);
/*
* Determine if there's a path on argv0. If there is, that's the base dir.
*/
ptr = strstr(argv0, dirsep);
if (ptr != NULL)
{
char *p = ptr;
size_t size;
while (p != NULL)
{
ptr = p;
p = strstr(p + 1, dirsep);
} /* while */
size = (size_t) (ptr - argv0);
retval = (char *) malloc(size + 1);
BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
memcpy(retval, argv0, size);
retval[size] = '\0';
return(retval);
} /* if */
/*
* Last ditch effort: it's the current working directory. (*shrug*)
*/
retval = __PHYSFS_platformCurrentDir();
if (retval != NULL)
return(retval);
/*
* Ok, current directory doesn't exist, use the root directory.
* Not a good alternative, but it only happens if the current
* directory was deleted from under the program.
*/
retval = (char *) malloc(strlen(dirsep) + 1);
strcpy(retval, dirsep);
return(retval);
} /* 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();
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);
ptr = __PHYSFS_platformRealPath(baseDir);
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);
free(userDir);
userDir = ptr;
} /* if */
if ((userDir == NULL) || (!appendDirSep(&userDir)))
{
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 */
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)
{
free(baseDir);
baseDir = NULL;
} /* if */
if (userDir != NULL)
{
free(userDir);
userDir = NULL;
} /* if */
allowSymLinks = 0;
initialized = 0;
__PHYSFS_platformDestroyMutex(errorLock);
__PHYSFS_platformDestroyMutex(stateLock);
allocator.deinit();
errorLock = stateLock = NULL;
return(1);
} /* PHYSFS_deinit */
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++)
free(*i);
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);
BAIL_IF_MACRO(mountPoint == NULL, ERR_INVALID_ARGUMENT, 0);
__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 */
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 */
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();
char *str;
BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0);
/* set write dir... */
str = malloc(strlen(userdir) + (strlen(organization) * 2) +
(strlen(appName) * 2) + (strlen(dirsep) * 3) + 2);
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. */
free(str);
BAIL_MACRO(ERR_CANT_SET_WRITE_DIR, 0);
} /* if */
} /* if */
/* Put write dir first in search path... */
PHYSFS_addToSearchPath(str, 0);
free(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_platformStricmp(ext, archiveExt) == 0)
{
const char *d = PHYSFS_getRealDir(*i);
str = malloc(strlen(d) + strlen(dirsep) + l + 1);
if (str != NULL)
{
sprintf(str, "%s%s%s", d, dirsep, *i);
PHYSFS_addToSearchPath(str, archivesFirst == 0);
free(str);
} /* if */
} /* if */
} /* if */
} /* for */
PHYSFS_freeList(rc);
} /* if */
return(1);
} /* PHYSFS_setSaneConfig */
void PHYSFS_permitSymbolicLinks(int allow)
{
allowSymLinks = allow;
} /* PHYSFS_permitSymbolicLinks */
/* 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 == '/')
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 *) 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 be an output fromsanitizePlatformIndependentPath(), 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.
*/
int __PHYSFS_verifySecurity(DirHandle *h, char *fname, int allowMissing)
{
int retval = 1;
char *start;
char *end;
char *str;
if (*fname == '\0') /* quick rejection. */
return(1);
if (h->mountPoint != NULL) /* NULL mountpoint means "/". */
{
/* !!! FIXME: Case insensitive? */
size_t mntpntlen = strlen(h->mountPoint);
assert(mntpntlen > 1); /* root mount points should be NULL. */
size_t len = strlen(fname);
/* not under the mountpoint, so skip this archive. */
BAIL_IF_MACRO(len < mntpntlen, ERR_NO_SUCH_PATH, 0);
retval = strncmp(h->mountPoint, fname, mntpntlen);
BAIL_IF_MACRO(retval != 0, ERR_NO_SUCH_PATH, 0);
fname += mntpntlen; /* move to start of actual archive path. */
retval = 1;
} /* if */
/* !!! FIXME: Can we ditch this malloc()? */
start = str = malloc(strlen(fname) + 1);
BAIL_IF_MACRO(str == NULL, ERR_OUT_OF_MEMORY, 0);
strcpy(str, fname);
if (!allowSymLinks)
{
while (1)
{
end = strchr(start, '/');
if (end != NULL)
*end = '\0';
if (h->funcs->isSymLink(h->opaque, str, &retval))
{
__PHYSFS_setError(ERR_SYMLINK_DISALLOWED);
free(str);
return(0); /* insecure. */
} /* if */
/* 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;
*end = '/';
start = end + 1;
} /* while */
} /* if */
return(retval);
} /* __PHYSFS_verifySecurity */
int PHYSFS_mkdir(const char *_dname)
{
DirHandle *h;
char *str;
char *start;
char *end;
int retval = 0;
int exists = 1; /* force existance check on first path element. */
char *dname;
dname = ((_dname) ? (char *) alloca(strlen(_dname) + 1) : NULL);
BAIL_IF_MACRO(dname == NULL, ERR_INVALID_ARGUMENT, 0);
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(!__PHYSFS_verifySecurity(h,dname,1),NULL,stateLock,0);
start = str = dname;
BAIL_IF_MACRO_MUTEX(str == NULL, ERR_OUT_OF_MEMORY, stateLock, 0);
strcpy(str, 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, str, &exists);
if (!exists)
retval = h->funcs->mkdir(h->opaque, str);
if (!retval)
break;
if (end == NULL)
break;
*end = '/';
start = end + 1;
} /* while */
__PHYSFS_platformReleaseMutex(stateLock);
return(retval);
} /* PHYSFS_mkdir */
int PHYSFS_delete(const char *_fname)
{
int retval;
DirHandle *h;
char *fname = ((_fname) ? (char *) alloca(strlen(_fname) + 1) : NULL);
BAIL_IF_MACRO(fname == NULL, ERR_INVALID_ARGUMENT, 0);
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(!__PHYSFS_verifySecurity(h,fname,0),NULL,stateLock,0);
retval = h->funcs->remove(h->opaque, fname);
__PHYSFS_platformReleaseMutex(stateLock);
return(retval);
} /* PHYSFS_delete */
const char *PHYSFS_getRealDir(const char *_fname)
{
DirHandle *i;
const char *retval = NULL;
char *fname = ((_fname) ? (char *) alloca(strlen(_fname) + 1) : NULL);
BAIL_IF_MACRO(fname == NULL, ERR_INVALID_ARGUMENT, NULL);
BAIL_IF_MACRO(!sanitizePlatformIndependentPath(_fname, fname), NULL, NULL);
__PHYSFS_platformGrabMutex(stateLock);
for (i = searchPath; ((i != NULL) && (retval == NULL)); i = i->next)
{
if (__PHYSFS_verifySecurity(i, fname, 0))
{
if (i->funcs->exists(i->opaque, fname))
retval = i->dirName;
} /* if */
} /* for */
__PHYSFS_platformReleaseMutex(stateLock);
return(retval);
} /* PHYSFS_getRealDir */
static int locateInStringList(const char *str,
char **list,
PHYSFS_uint32 *pos)
{
PHYSFS_uint32 hi = *pos - 1;
PHYSFS_uint32 lo = 0;
PHYSFS_uint32 i = hi >> 1;
int cmp;
assert(*pos != 0); /* this doesn't work with empty lists! */
while (hi != lo)
{
cmp = strcmp(list[i], str);
if (cmp == 0) /* it's in the list already. */
return(1);
else if (cmp < 0)
{
hi = i;
i = lo + ((hi - lo) >> 1);
} /* else if */
else
{
lo = i + 1;
i = lo + ((1 + hi - lo) >> 1);
} /* else */
} /* while */
/* hi == lo, check it in case it's the match... */
cmp = strcmp(list[lo], str);
if (cmp == 0)
return(1);
/* not in the list, set insertion point... */
*pos = (cmp < 0) ? lo : lo + 1;
return(0);
} /* locateInStringList */
static void enumFilesCallback(void *data, 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 (pos > 0)
{
if (locateInStringList(str, pecd->list, &pos))
return; /* already in the list. */
} /* if */
ptr = realloc(pecd->list, (pecd->size + 2) * sizeof (char *));
newstr = 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 **) 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 */
void PHYSFS_enumerateFilesCallback(const char *_fname,
PHYSFS_StringCallback callback,
void *data)
{
DirHandle *i;
int noSyms;
char *fname = ((_fname) ? (char *) alloca(strlen(_fname) + 1) : NULL);
if ((fname == NULL) || (callback == NULL))
return; /* oh well. */
if (!sanitizePlatformIndependentPath(_fname, fname))
return;
__PHYSFS_platformGrabMutex(stateLock);
noSyms = !allowSymLinks;
for (i = searchPath; i != NULL; i = i->next)
{
if (__PHYSFS_verifySecurity(i, fname, 0))
i->funcs->enumerateFiles(i->opaque, fname, noSyms, callback, data);
} /* for */
__PHYSFS_platformReleaseMutex(stateLock);
} /* PHYSFS_enumerateFilesCallback */
int PHYSFS_exists(const char *fname)
{
return(PHYSFS_getRealDir(fname) != NULL);
} /* PHYSFS_exists */
PHYSFS_sint64 PHYSFS_getLastModTime(const char *_fname)
{
DirHandle *i;
PHYSFS_sint64 retval = -1;
int fileExists = 0;
char *fname = ((_fname) ? (char *) alloca(strlen(_fname) + 1) : NULL);
BAIL_IF_MACRO(fname == NULL, ERR_INVALID_ARGUMENT, 0);
BAIL_IF_MACRO(!sanitizePlatformIndependentPath(_fname, fname), NULL, 0);
if (*fname == '\0') /* eh...punt if it's the root dir. */
return(1); /* !!! FIXME: Maybe this should be an error? */
__PHYSFS_platformGrabMutex(stateLock);
for (i = searchPath; ((i != NULL) && (!fileExists)); i = i->next)
{
if (__PHYSFS_verifySecurity(i, fname, 0))
retval = i->funcs->getLastModTime(i->opaque, fname, &fileExists);
} /* for */
__PHYSFS_platformReleaseMutex(stateLock);
return(retval);
} /* PHYSFS_getLastModTime */
int PHYSFS_isDirectory(const char *_fname)
{
DirHandle *i;
int retval = 0;
int fileExists = 0;
char *fname = ((_fname) ? (char *) alloca(strlen(_fname) + 1) : NULL);
BAIL_IF_MACRO(fname == NULL, ERR_INVALID_ARGUMENT, 0);
BAIL_IF_MACRO(!sanitizePlatformIndependentPath(_fname, fname), NULL, 0);
BAIL_IF_MACRO(*fname == '\0', NULL, 1); /* Root is always a dir. :) */
__PHYSFS_platformGrabMutex(stateLock);
for (i = searchPath; ((i != NULL) && (!fileExists)); i = i->next)
{
if (__PHYSFS_verifySecurity(i, fname, 0))
retval = i->funcs->isDirectory(i->opaque, fname, &fileExists);
} /* for */
__PHYSFS_platformReleaseMutex(stateLock);
return(retval);
} /* PHYSFS_isDirectory */
int PHYSFS_isSymbolicLink(const char *_fname)
{
DirHandle *i;
int retval = 0;
int fileExists = 0;
char *fname;
BAIL_IF_MACRO(!allowSymLinks, ERR_SYMLINK_DISALLOWED, 0);
fname = ((_fname) ? (char *) alloca(strlen(_fname) + 1) : NULL);
BAIL_IF_MACRO(fname == NULL, ERR_INVALID_ARGUMENT, 0);
BAIL_IF_MACRO(!sanitizePlatformIndependentPath(_fname, fname), NULL, 0);
BAIL_IF_MACRO(*fname == '\0', NULL, 0); /* Root is never a symlink */
__PHYSFS_platformGrabMutex(stateLock);
for (i = searchPath; ((i != NULL) && (!fileExists)); i = i->next)
{
if (__PHYSFS_verifySecurity(i, fname, 0))
retval = i->funcs->isSymLink(i->opaque, fname, &fileExists);
} /* for */
__PHYSFS_platformReleaseMutex(stateLock);
return(retval);
} /* PHYSFS_isSymbolicLink */
static PHYSFS_File *doOpenWrite(const char *_fname, int appending)
{
void *opaque = NULL;
FileHandle *fh = NULL;
DirHandle *h = NULL;
const PHYSFS_Archiver *f;
char *fname = ((_fname) ? (char *) alloca(strlen(_fname) + 1) : NULL);
BAIL_IF_MACRO(fname == NULL, ERR_INVALID_ARGUMENT, 0);
BAIL_IF_MACRO(!sanitizePlatformIndependentPath(_fname, fname), NULL, 0);
__PHYSFS_platformGrabMutex(stateLock);
BAIL_IF_MACRO_MUTEX(!writeDir, ERR_NO_WRITE_DIR, stateLock, NULL);
h = writeDir;
BAIL_IF_MACRO_MUTEX(!__PHYSFS_verifySecurity(h, fname, 0), NULL,
stateLock, NULL);
f = h->funcs;
if (appending)
opaque = f->openAppend(h->opaque, fname);
else
opaque = f->openWrite(h->opaque, fname);
BAIL_IF_MACRO_MUTEX(opaque == NULL, NULL, stateLock, NULL);
fh = (FileHandle *) malloc(sizeof (FileHandle));
if (fh == NULL)
{
f->fileClose(opaque);
BAIL_MACRO_MUTEX(ERR_OUT_OF_MEMORY, stateLock, NULL);
} /* if */
else
{
memset(fh, '\0', sizeof (FileHandle));
fh->opaque = opaque;
fh->dirHandle = h;
fh->funcs = h->funcs;
fh->next = openWriteList;
openWriteList = fh;
} /* else */
__PHYSFS_platformReleaseMutex(stateLock);
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;
int fileExists = 0;
DirHandle *i = NULL;
fvoid *opaque = NULL;
char *fname = ((_fname) ? (char *) alloca(strlen(_fname) + 1) : NULL);
BAIL_IF_MACRO(fname == NULL, ERR_INVALID_ARGUMENT, 0);
BAIL_IF_MACRO(!sanitizePlatformIndependentPath(_fname, fname), NULL, 0);
__PHYSFS_platformGrabMutex(stateLock);
BAIL_IF_MACRO_MUTEX(!searchPath, ERR_NOT_IN_SEARCH_PATH, stateLock, NULL);
i = searchPath;
do
{
if (__PHYSFS_verifySecurity(i, fname, 0))
{
opaque = i->funcs->openRead(i->opaque, fname, &fileExists);
if (opaque)
break;
} /* if */
i = i->next;
} while ((i != NULL) && (!fileExists));
BAIL_IF_MACRO_MUTEX(opaque == NULL, NULL, stateLock, NULL);
fh = (FileHandle *) malloc(sizeof (FileHandle));
if (fh == NULL)
{
i->funcs->fileClose(opaque);
BAIL_MACRO_MUTEX(ERR_OUT_OF_MEMORY, stateLock, NULL);
} /* if */
memset(fh, '\0', sizeof (FileHandle));
fh->opaque = opaque;
fh->forReading = 1;
fh->dirHandle = i;
fh->funcs = i->funcs;
fh->next = openReadList;
openReadList = fh;
__PHYSFS_platformReleaseMutex(stateLock);
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. */
free(tmp);
if (prev == NULL)
*list = handle->next;
else
prev->next = handle->next;
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);
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);
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 += 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)
{
free(fh->buffer);
fh->buffer = NULL;
} /* if */
} /* if */
else
{
PHYSFS_uint8 *newbuf = 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(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 setDefaultAllocator(void)
{
assert(!externalAllocator);
allocator.init = __PHYSFS_platformAllocatorInit;
allocator.deinit = __PHYSFS_platformAllocatorDeinit;
allocator.malloc = __PHYSFS_platformAllocatorMalloc;
allocator.realloc = __PHYSFS_platformAllocatorRealloc;
allocator.free = __PHYSFS_platformAllocatorFree;
} /* setDefaultAllocator */
PHYSFS_Allocator *__PHYSFS_getAllocator(void)
{
return(&allocator);
} /* __PHYFS_getAllocator */
/* end of physfs.c ... */
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