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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
#if (defined PHYSFS_PROFILING)
#include <sys/time.h>
#include <unistd.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "physfs.h"
#define __PHYSICSFS_INTERNAL__
#include "physfs_internal.h"
typedef struct __PHYSFS_ERRMSGTYPE__
{
PHYSFS_uint64 tid;
int errorAvailable;
char errorString[80];
struct __PHYSFS_ERRMSGTYPE__ *next;
} ErrMsg;
typedef struct __PHYSFS_DIRINFO__
{
char *dirName;
DirHandle *dirHandle;
struct __PHYSFS_DIRINFO__ *next;
} PhysDirInfo;
typedef struct __PHYSFS_FILEHANDLELIST__
{
PHYSFS_file handle;
struct __PHYSFS_FILEHANDLELIST__ *next;
} FileHandleList;
/* The various i/o drivers... */
#if (defined PHYSFS_SUPPORTS_ZIP)
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_ZIP;
extern const DirFunctions __PHYSFS_DirFunctions_ZIP;
#endif
#if (defined PHYSFS_SUPPORTS_GRP)
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_GRP;
extern const DirFunctions __PHYSFS_DirFunctions_GRP;
#endif
#if (defined PHYSFS_SUPPORTS_QPAK)
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_QPAK;
extern const DirFunctions __PHYSFS_DirFunctions_QPAK;
#endif
#if (defined PHYSFS_SUPPORTS_HOG)
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_HOG;
extern const DirFunctions __PHYSFS_DirFunctions_HOG;
#endif
#if (defined PHYSFS_SUPPORTS_MVL)
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_MVL;
extern const DirFunctions __PHYSFS_DirFunctions_MVL;
#endif
#if (defined PHYSFS_SUPPORTS_WAD)
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_WAD;
extern const DirFunctions __PHYSFS_DirFunctions_WAD;
#endif
extern const DirFunctions __PHYSFS_DirFunctions_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
NULL
};
static const DirFunctions *dirFunctions[] =
{
#if (defined PHYSFS_SUPPORTS_ZIP)
&__PHYSFS_DirFunctions_ZIP,
#endif
#if (defined PHYSFS_SUPPORTS_GRP)
&__PHYSFS_DirFunctions_GRP,
#endif
#if (defined PHYSFS_SUPPORTS_QPAK)
&__PHYSFS_DirFunctions_QPAK,
#endif
#if (defined PHYSFS_SUPPORTS_HOG)
&__PHYSFS_DirFunctions_HOG,
#endif
#if (defined PHYSFS_SUPPORTS_MVL)
&__PHYSFS_DirFunctions_MVL,
#endif
#if (defined PHYSFS_SUPPORTS_WAD)
&__PHYSFS_DirFunctions_WAD,
#endif
&__PHYSFS_DirFunctions_DIR,
NULL
};
/* General PhysicsFS state ... */
static int initialized = 0;
static ErrMsg *errorMessages = NULL;
static PhysDirInfo *searchPath = NULL;
static PhysDirInfo *writeDir = NULL;
static FileHandleList *openWriteList = NULL;
static FileHandleList *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. */
/* functions ... */
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 */
#if (defined PHYSFS_PROFILING)
#define PHYSFS_TEST_SORT_ITERATIONS 150
#define PHYSFS_TEST_SORT_ELEMENTS (64 * 1024)
static int __PHYSFS_test_sort_cmp(void *_a, PHYSFS_uint32 x, PHYSFS_uint32 y)
{
PHYSFS_sint32 *a = (PHYSFS_sint32 *) _a;
PHYSFS_sint32 one = a[x];
PHYSFS_sint32 two = a[y];
if (one < two)
return(-1);
else if (one > two)
return(1);
return(0);
} /* __PHYSFS_test_sort_cmp */
static void __PHYSFS_test_sort_swap(void *_a, PHYSFS_uint32 x, PHYSFS_uint32 y)
{
PHYSFS_sint32 *a = (PHYSFS_sint32 *) _a;
PHYSFS_sint32 tmp;
tmp = a[x];
a[x] = a[y];
a[y] = tmp;
} /* __PHYSFS_test_sort_swap */
static int __PHYSFS_test_sort_do(PHYSFS_uint32 *timer,
PHYSFS_sint32 *a, PHYSFS_uint32 max,
int (*cmpfn)(void *, PHYSFS_uint32, PHYSFS_uint32),
void (*swapfn)(void *, PHYSFS_uint32, PHYSFS_uint32))
{
PHYSFS_uint32 i;
struct timeval starttime, endtime;
gettimeofday(&starttime, NULL);
__PHYSFS_sort(a, max, cmpfn, swapfn);
gettimeofday(&endtime, NULL);
for (i = 1; i < max; i++)
{
if (a[i] < a[i - 1])
return(0);
} /* for */
if (timer != NULL)
{
*timer = ( ((endtime.tv_sec - starttime.tv_sec) * 1000) +
((endtime.tv_usec - starttime.tv_usec) / 1000) );
} /* if */
return(1);
} /* __PHYSFS_test_sort_time */
static void __PHYSFS_test_sort(void)
{
PHYSFS_uint32 elasped[PHYSFS_TEST_SORT_ITERATIONS];
PHYSFS_sint32 iter;
PHYSFS_sint32 a[PHYSFS_TEST_SORT_ELEMENTS];
PHYSFS_sint32 i, x;
int success;
printf("Testing __PHYSFS_sort (linear presorted) ... ");
for (iter = 0; iter < PHYSFS_TEST_SORT_ITERATIONS; iter++)
{
/* set up array to sort. */
for (i = 0; i < PHYSFS_TEST_SORT_ELEMENTS; i++)
a[i] = i;
/* sort it. */
success = __PHYSFS_test_sort_do(&elasped[iter],
a, PHYSFS_TEST_SORT_ELEMENTS,
__PHYSFS_test_sort_cmp,
__PHYSFS_test_sort_swap);
if (!success)
break;
} /* for */
if (!success)
printf("Failed!\n");
else
{
for (x = 0, iter = 0; iter < PHYSFS_TEST_SORT_ITERATIONS; iter++)
x += elasped[iter];
x /= PHYSFS_TEST_SORT_ITERATIONS;
printf("Average run (%lu) ms.\n", (unsigned long) x);
} /* else */
printf("Testing __PHYSFS_sort (linear presorted reverse) ... ");
for (iter = 0; iter < PHYSFS_TEST_SORT_ITERATIONS; iter++)
{
/* set up array to sort. */
for (i = 0, x = PHYSFS_TEST_SORT_ELEMENTS;
i < PHYSFS_TEST_SORT_ELEMENTS;
i++, x--)
{
a[i] = x;
} /* for */
/* sort it. */
success = __PHYSFS_test_sort_do(&elasped[iter],
a, PHYSFS_TEST_SORT_ELEMENTS,
__PHYSFS_test_sort_cmp,
__PHYSFS_test_sort_swap);
if (!success)
break;
} /* for */
if (!success)
printf("Failed!\n");
else
{
for (x = 0, iter = 0; iter < PHYSFS_TEST_SORT_ITERATIONS; iter++)
x += elasped[iter];
x /= PHYSFS_TEST_SORT_ITERATIONS;
printf("Average run (%lu) ms.\n", (unsigned long) x);
} /* else */
printf("Testing __PHYSFS_sort (randomized) ... ");
for (iter = 0; iter < PHYSFS_TEST_SORT_ITERATIONS; iter++)
{
/* set up array to sort. */
for (i = 0; i < PHYSFS_TEST_SORT_ELEMENTS; i++)
a[i] = (PHYSFS_uint32) rand();
/* sort it. */
success = __PHYSFS_test_sort_do(&elasped[iter],
a, PHYSFS_TEST_SORT_ELEMENTS,
__PHYSFS_test_sort_cmp,
__PHYSFS_test_sort_swap);
if (!success)
break;
} /* for */
if (!success)
printf("Failed!\n");
else
{
for (x = 0, iter = 0; iter < PHYSFS_TEST_SORT_ITERATIONS; iter++)
x += elasped[iter];
x /= PHYSFS_TEST_SORT_ITERATIONS;
printf("Average run (%lu) ms.\n", (unsigned long) x);
} /* else */
printf("__PHYSFS_test_sort() complete.\n\n");
} /* __PHYSFS_test_sort */
#endif
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 *openDirectory(const char *d, int forWriting)
{
const DirFunctions **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 = dirFunctions; *i != NULL; i++)
{
if (__PHYSFS_platformStricmp(ext, (*i)->info->extension) == 0)
{
if ((*i)->isArchive(d, forWriting))
return( (*i)->openArchive(d, forWriting) );
} /* if */
} /* for */
/* failing an exact file extension match, try all the others... */
for (i = dirFunctions; *i != NULL; i++)
{
if (__PHYSFS_platformStricmp(ext, (*i)->info->extension) != 0)
{
if ((*i)->isArchive(d, forWriting))
return( (*i)->openArchive(d, forWriting) );
} /* if */
} /* for */
} /* if */
else /* no extension? Try them all. */
{
for (i = dirFunctions; *i != NULL; i++)
{
if ((*i)->isArchive(d, forWriting))
return( (*i)->openArchive(d, forWriting) );
} /* for */
} /* else */
__PHYSFS_setError(ERR_UNSUPPORTED_ARCHIVE);
return(NULL);
} /* openDirectory */
static PhysDirInfo *buildDirInfo(const char *newDir, int forWriting)
{
DirHandle *dirHandle = NULL;
PhysDirInfo *di = NULL;
BAIL_IF_MACRO(newDir == NULL, ERR_INVALID_ARGUMENT, 0);
dirHandle = openDirectory(newDir, forWriting);
BAIL_IF_MACRO(dirHandle == NULL, NULL, 0);
di = (PhysDirInfo *) malloc(sizeof (PhysDirInfo));
if (di == NULL)
{
dirHandle->funcs->dirClose(dirHandle);
BAIL_IF_MACRO(di == NULL, ERR_OUT_OF_MEMORY, 0);
} /* if */
di->dirName = (char *) malloc(strlen(newDir) + 1);
if (di->dirName == NULL)
{
free(di);
dirHandle->funcs->dirClose(dirHandle);
BAIL_MACRO(ERR_OUT_OF_MEMORY, 0);
} /* if */
di->next = NULL;
di->dirHandle = dirHandle;
strcpy(di->dirName, newDir);
return(di);
} /* buildDirInfo */
/* MAKE SURE you've got the stateLock held before calling this! */
static int freeDirInfo(PhysDirInfo *di, FileHandleList *openList)
{
FileHandleList *i;
if (di == NULL)
return(1);
for (i = openList; i != NULL; i = i->next)
{
const DirHandle *h = ((FileHandle *) &(i->handle.opaque))->dirHandle;
BAIL_IF_MACRO(h == di->dirHandle, ERR_FILES_STILL_OPEN, 0);
} /* for */
di->dirHandle->funcs->dirClose(di->dirHandle);
free(di->dirName);
free(di);
return(1);
} /* freeDirInfo */
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 */
int PHYSFS_init(const char *argv0)
{
char *ptr;
BAIL_IF_MACRO(initialized, ERR_IS_INITIALIZED, 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());
#if (defined PHYSFS_PROFILING)
srand(time(NULL));
setbuf(stdout, NULL);
printf("\n");
printf("********************************************************\n");
printf("Warning! Profiling is built into this copy of PhysicsFS!\n");
printf("********************************************************\n");
printf("\n");
printf("\n");
__PHYSFS_test_sort();
#endif
return(1);
} /* PHYSFS_init */
/* MAKE SURE you hold stateLock before calling this! */
static int closeFileHandleList(FileHandleList **list)
{
FileHandleList *i;
FileHandleList *next = NULL;
FileHandle *h;
for (i = *list; i != NULL; i = next)
{
next = i->next;
h = (FileHandle *) (i->handle.opaque);
if (!h->funcs->fileClose(h))
{
*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)
{
PhysDirInfo *i;
PhysDirInfo *next = NULL;
closeFileHandleList(&openReadList);
if (searchPath != NULL)
{
for (i = searchPath; i != NULL; i = next)
{
next = i->next;
freeDirInfo(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);
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(__PHYSFS_platformDetectAvailableCDs());
} /* PHYSFS_getCdRomDirs */
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(!freeDirInfo(writeDir, openWriteList), NULL,
stateLock, 0);
writeDir = NULL;
} /* if */
if (newDir != NULL)
{
writeDir = buildDirInfo(newDir, 1);
retval = (writeDir != NULL);
} /* if */
__PHYSFS_platformReleaseMutex(stateLock);
return(retval);
} /* PHYSFS_setWriteDir */
int PHYSFS_addToSearchPath(const char *newDir, int appendToPath)
{
PhysDirInfo *di;
PhysDirInfo *prev = NULL;
PhysDirInfo *i;
__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 */
di = buildDirInfo(newDir, 0);
BAIL_IF_MACRO_MUTEX(di == NULL, NULL, stateLock, 0);
if (appendToPath)
{
di->next = NULL;
if (prev == NULL)
searchPath = di;
else
prev->next = di;
} /* if */
else
{
di->next = searchPath;
searchPath = di;
} /* else */
__PHYSFS_platformReleaseMutex(stateLock);
return(1);
} /* PHYSFS_addToSearchPath */
int PHYSFS_removeFromSearchPath(const char *oldDir)
{
PhysDirInfo *i;
PhysDirInfo *prev = NULL;
PhysDirInfo *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(!freeDirInfo(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)
{
int count = 1;
int x;
PhysDirInfo *i;
char **retval;
__PHYSFS_platformGrabMutex(stateLock);
for (i = searchPath; i != NULL; i = i->next)
count++;
retval = (char **) malloc(sizeof (char *) * count);
BAIL_IF_MACRO_MUTEX(!retval, ERR_OUT_OF_MEMORY, stateLock, NULL);
count--;
retval[count] = NULL;
for (i = searchPath, x = 0; x < count; i = i->next, x++)
{
retval[x] = (char *) malloc(strlen(i->dirName) + 1);
if (retval[x] == NULL) /* this is friggin' ugly. */
{
while (x > 0)
{
x--;
free(retval[x]);
} /* while */
free(retval);
BAIL_MACRO_MUTEX(ERR_OUT_OF_MEMORY, stateLock, NULL);
} /* if */
strcpy(retval[x], i->dirName);
} /* for */
__PHYSFS_platformReleaseMutex(stateLock);
return(retval);
} /* PHYSFS_getSearchPath */
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);
strcpy(str, append);
} /* if */
return(str);
} /* __PHYSFS_convertToDependent */
int __PHYSFS_verifySecurity(DirHandle *h, const char *fname, int allowMissing)
{
int retval = 1;
char *start;
char *end;
char *str;
if (*fname == '\0') /* quick rejection. */
return(1);
/* !!! 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);
while (1)
{
end = strchr(start, '/');
if (end != NULL)
*end = '\0';
if ( (strcmp(start, ".") == 0) ||
(strcmp(start, "..") == 0) ||
(strchr(start, '\\') != NULL) ||
(strchr(start, ':') != NULL) )
{
__PHYSFS_setError(ERR_INSECURE_FNAME);
retval = 0;
break;
} /* if */
if (!allowSymLinks)
{
if (h->funcs->isSymLink(h, 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 */
if (end == NULL)
break;
*end = '/';
start = end + 1;
} /* while */
free(str);
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. */
BAIL_IF_MACRO(dname == NULL, ERR_INVALID_ARGUMENT, 0);
while (*dname == '/')
dname++;
__PHYSFS_platformGrabMutex(stateLock);
BAIL_IF_MACRO_MUTEX(writeDir == NULL, ERR_NO_WRITE_DIR, stateLock, 0);
h = writeDir->dirHandle;
BAIL_IF_MACRO_MUTEX(!__PHYSFS_verifySecurity(h,dname,1),NULL,stateLock,0);
start = str = malloc(strlen(dname) + 1);
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, str, &exists);
if (!exists)
retval = h->funcs->mkdir(h, str);
if (!retval)
break;
if (end == NULL)
break;
*end = '/';
start = end + 1;
} /* while */
__PHYSFS_platformReleaseMutex(stateLock);
free(str);
return(retval);
} /* PHYSFS_mkdir */
int PHYSFS_delete(const char *fname)
{
int retval;
DirHandle *h;
BAIL_IF_MACRO(fname == NULL, ERR_INVALID_ARGUMENT, 0);
while (*fname == '/')
fname++;
__PHYSFS_platformGrabMutex(stateLock);
BAIL_IF_MACRO_MUTEX(writeDir == NULL, ERR_NO_WRITE_DIR, stateLock, 0);
h = writeDir->dirHandle;
BAIL_IF_MACRO_MUTEX(!__PHYSFS_verifySecurity(h,fname,0),NULL,stateLock,0);
retval = h->funcs->remove(h, fname);
__PHYSFS_platformReleaseMutex(stateLock);
return(retval);
} /* PHYSFS_delete */
const char *PHYSFS_getRealDir(const char *filename)
{
PhysDirInfo *i;
const char *retval = NULL;
while (*filename == '/')
filename++;
__PHYSFS_platformGrabMutex(stateLock);
for (i = searchPath; ((i != NULL) && (retval == NULL)); i = i->next)
{
DirHandle *h = i->dirHandle;
if (__PHYSFS_verifySecurity(h, filename, 0))
{
if (h->funcs->exists(h, filename))
retval = i->dirName;
} /* if */
} /* for */
__PHYSFS_platformReleaseMutex(stateLock);
return(retval);
} /* PHYSFS_getRealDir */
static int countList(LinkedStringList *list)
{
int retval = 0;
LinkedStringList *i;
for (i = list; i != NULL; i = i->next)
retval++;
return(retval);
} /* countList */
static char **convertStringListToPhysFSList(LinkedStringList *finalList)
{
int i;
LinkedStringList *next = NULL;
int len = countList(finalList);
char **retval = (char **) malloc((len + 1) * sizeof (char *));
if (retval == NULL)
__PHYSFS_setError(ERR_OUT_OF_MEMORY);
for (i = 0; i < len; i++)
{
next = finalList->next;
if (retval == NULL)
free(finalList->str);
else
retval[i] = finalList->str;
free(finalList);
finalList = next;
} /* for */
if (retval != NULL)
retval[i] = NULL;
return(retval);
} /* convertStringListToPhysFSList */
static void insertStringListItem(LinkedStringList **final,
LinkedStringList *item)
{
LinkedStringList *i;
LinkedStringList *prev = NULL;
int rc;
for (i = *final; i != NULL; i = i->next)
{
rc = strcmp(i->str, item->str);
if (rc > 0) /* insertion point. */
break;
else if (rc == 0) /* already in list. */
{
free(item->str);
free(item);
return;
} /* else if */
prev = i;
} /* for */
/*
* If we are here, we are either at the insertion point.
* This may be the end of the list, or the list may be empty, too.
*/
if (prev == NULL)
*final = item;
else
prev->next = item;
item->next = i;
} /* insertStringListItem */
/* if we run out of memory anywhere in here, we give back what we can. */
static void interpolateStringLists(LinkedStringList **final,
LinkedStringList *newList)
{
LinkedStringList *next = NULL;
while (newList != NULL)
{
next = newList->next;
insertStringListItem(final, newList);
newList = next;
} /* while */
} /* interpolateStringLists */
char **PHYSFS_enumerateFiles(const char *path)
{
PhysDirInfo *i;
char **retval = NULL;
LinkedStringList *rc;
LinkedStringList *finalList = NULL;
int omitSymLinks = !allowSymLinks;
BAIL_IF_MACRO(path == NULL, ERR_INVALID_ARGUMENT, NULL);
while (*path == '/')
path++;
__PHYSFS_platformGrabMutex(stateLock);
for (i = searchPath; i != NULL; i = i->next)
{
DirHandle *h = i->dirHandle;
if (__PHYSFS_verifySecurity(h, path, 0))
{
rc = h->funcs->enumerateFiles(h, path, omitSymLinks);
interpolateStringLists(&finalList, rc);
} /* if */
} /* for */
__PHYSFS_platformReleaseMutex(stateLock);
retval = convertStringListToPhysFSList(finalList);
return(retval);
} /* PHYSFS_enumerateFiles */
int PHYSFS_exists(const char *fname)
{
BAIL_IF_MACRO(fname == NULL, ERR_INVALID_ARGUMENT, 0);
while (*fname == '/')
fname++;
return(PHYSFS_getRealDir(fname) != NULL);
} /* PHYSFS_exists */
PHYSFS_sint64 PHYSFS_getLastModTime(const char *fname)
{
PhysDirInfo *i;
PHYSFS_sint64 retval = -1;
int fileExists = 0;
BAIL_IF_MACRO(fname == NULL, ERR_INVALID_ARGUMENT, 0);
while (*fname == '/')
fname++;
if (*fname == '\0') /* eh...punt if it's the root dir. */
return(1);
__PHYSFS_platformGrabMutex(stateLock);
for (i = searchPath; ((i != NULL) && (!fileExists)); i = i->next)
{
DirHandle *h = i->dirHandle;
if (__PHYSFS_verifySecurity(h, fname, 0))
retval = h->funcs->getLastModTime(h, fname, &fileExists);
} /* for */
__PHYSFS_platformReleaseMutex(stateLock);
return(retval);
} /* PHYSFS_getLastModTime */
int PHYSFS_isDirectory(const char *fname)
{
PhysDirInfo *i;
int retval = 0;
int fileExists = 0;
BAIL_IF_MACRO(fname == NULL, ERR_INVALID_ARGUMENT, 0);
while (*fname == '/')
fname++;
BAIL_IF_MACRO(*fname == '\0', NULL, 1); /* Root is always a dir. :) */
__PHYSFS_platformGrabMutex(stateLock);
for (i = searchPath; ((i != NULL) && (!fileExists)); i = i->next)
{
DirHandle *h = i->dirHandle;
if (__PHYSFS_verifySecurity(h, fname, 0))
retval = h->funcs->isDirectory(h, fname, &fileExists);
} /* for */
__PHYSFS_platformReleaseMutex(stateLock);
return(retval);
} /* PHYSFS_isDirectory */
int PHYSFS_isSymbolicLink(const char *fname)
{
PhysDirInfo *i;
int retval = 0;
int fileExists = 0;
BAIL_IF_MACRO(!allowSymLinks, ERR_SYMLINK_DISALLOWED, 0);
BAIL_IF_MACRO(fname == NULL, ERR_INVALID_ARGUMENT, 0);
while (*fname == '/')
fname++;
BAIL_IF_MACRO(*fname == '\0', NULL, 0); /* Root is never a symlink */
__PHYSFS_platformGrabMutex(stateLock);
for (i = searchPath; ((i != NULL) && (!fileExists)); i = i->next)
{
DirHandle *h = i->dirHandle;
if (__PHYSFS_verifySecurity(h, fname, 0))
retval = h->funcs->isSymLink(h, fname, &fileExists);
} /* for */
__PHYSFS_platformReleaseMutex(stateLock);
return(retval);
} /* PHYSFS_isSymbolicLink */
static PHYSFS_file *doOpenWrite(const char *fname, int appending)
{
PHYSFS_file *retval = NULL;
FileHandle *rc = NULL;
DirHandle *h;
const DirFunctions *f;
FileHandleList *list;
BAIL_IF_MACRO(fname == NULL, ERR_INVALID_ARGUMENT, NULL);
while (*fname == '/')
fname++;
__PHYSFS_platformGrabMutex(stateLock);
h = (writeDir == NULL) ? NULL : writeDir->dirHandle;
BAIL_IF_MACRO_MUTEX(!h, ERR_NO_WRITE_DIR, stateLock, NULL);
BAIL_IF_MACRO_MUTEX(!__PHYSFS_verifySecurity(h, fname, 0), NULL,
stateLock, NULL);
list = (FileHandleList *) malloc(sizeof (FileHandleList));
BAIL_IF_MACRO_MUTEX(!list, ERR_OUT_OF_MEMORY, stateLock, NULL);
f = h->funcs;
rc = (appending) ? f->openAppend(h, fname) : f->openWrite(h, fname);
if (rc == NULL)
free(list);
else
{
rc->buffer = NULL; /* just in case. */
rc->buffill = rc->bufpos = rc->bufsize = 0; /* just in case. */
rc->forReading = 0;
list->handle.opaque = (void *) rc;
list->next = openWriteList;
openWriteList = list;
retval = &(list->handle);
} /* else */
__PHYSFS_platformReleaseMutex(stateLock);
return(retval);
} /* 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)
{
PHYSFS_file *retval = NULL;
FileHandle *rc = NULL;
FileHandleList *list;
int fileExists = 0;
PhysDirInfo *i;
BAIL_IF_MACRO(fname == NULL, ERR_INVALID_ARGUMENT, NULL);
while (*fname == '/')
fname++;
__PHYSFS_platformGrabMutex(stateLock);
BAIL_IF_MACRO_MUTEX(!searchPath, ERR_NOT_IN_SEARCH_PATH, stateLock, NULL);
for (i = searchPath; ((i != NULL) && (!fileExists)); i = i->next)
{
DirHandle *h = i->dirHandle;
if (__PHYSFS_verifySecurity(h, fname, 0))
rc = h->funcs->openRead(h, fname, &fileExists);
} /* for */
BAIL_IF_MACRO_MUTEX(rc == NULL, NULL, stateLock, NULL);
list = (FileHandleList *) malloc(sizeof (FileHandleList));
BAIL_IF_MACRO_MUTEX(!list, ERR_OUT_OF_MEMORY, stateLock, NULL);
list->handle.opaque = (void *) rc;
list->next = openReadList;
openReadList = list;
retval = &(list->handle);
__PHYSFS_platformReleaseMutex(stateLock);
rc->buffer = NULL; /* just in case. */
rc->buffill = rc->bufpos = rc->bufsize = 0; /* just in case. */
rc->forReading = 1;
return(retval);
} /* PHYSFS_openRead */
static int closeHandleInOpenList(FileHandleList **list, PHYSFS_file *handle)
{
FileHandle *h = (FileHandle *) handle->opaque;
FileHandleList *prev = NULL;
FileHandleList *i;
int rc = 1;
for (i = *list; i != NULL; i = i->next)
{
if (&i->handle == handle) /* handle is in this list? */
{
PHYSFS_uint8 *tmp = h->buffer;
rc = PHYSFS_flush(handle);
if (rc)
rc = h->funcs->fileClose(h);
if (!rc)
return(-1);
if (tmp != NULL) /* free any associated buffer. */
free(tmp);
if (prev == NULL)
*list = i->next;
else
prev->next = i->next;
free(i);
return(1);
} /* if */
prev = i;
} /* for */
return(0);
} /* closeHandleInOpenList */
int PHYSFS_close(PHYSFS_file *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(PHYSFS_file *handle, void *buffer,
PHYSFS_uint32 objSize,
PHYSFS_uint32 objCount)
{
FileHandle *h = (FileHandle *) handle->opaque;
PHYSFS_sint64 retval = 0;
PHYSFS_uint32 remainder = 0;
while (objCount > 0)
{
PHYSFS_uint32 buffered = h->buffill - h->bufpos;
PHYSFS_uint64 mustread = (objSize * objCount) - remainder;
PHYSFS_uint32 copied;
if (buffered == 0) /* need to refill buffer? */
{
PHYSFS_sint64 rc = h->funcs->read(h, h->buffer, 1, h->bufsize);
if (rc <= 0)
{
h->bufpos -= remainder;
return(((rc == -1) && (retval == 0)) ? -1 : retval);
} /* if */
buffered = h->buffill = (PHYSFS_uint32) rc;
h->bufpos = 0;
} /* if */
if (buffered > mustread)
buffered = (PHYSFS_uint32) mustread;
memcpy(buffer, h->buffer + h->bufpos, (size_t) buffered);
buffer = ((PHYSFS_uint8 *) buffer) + buffered;
h->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 *h = (FileHandle *) handle->opaque;
BAIL_IF_MACRO(!h->forReading, ERR_FILE_ALREADY_OPEN_W, -1);
if (h->buffer != NULL)
return(doBufferedRead(handle, buffer, objSize, objCount));
return(h->funcs->read(h, buffer, objSize, objCount));
} /* PHYSFS_read */
static PHYSFS_sint64 doBufferedWrite(PHYSFS_file *handle, const void *buffer,
PHYSFS_uint32 objSize,
PHYSFS_uint32 objCount)
{
FileHandle *h = (FileHandle *) handle->opaque;
/* whole thing fits in the buffer? */
if (h->buffill + (objSize * objCount) < h->bufsize)
{
memcpy(h->buffer + h->buffill, buffer, objSize * objCount);
h->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(h->funcs->write(h, buffer, objSize, objCount));
} /* doBufferedWrite */
PHYSFS_sint64 PHYSFS_write(PHYSFS_file *handle, const void *buffer,
PHYSFS_uint32 objSize, PHYSFS_uint32 objCount)
{
FileHandle *h = (FileHandle *) handle->opaque;
BAIL_IF_MACRO(h->forReading, ERR_FILE_ALREADY_OPEN_R, -1);
if (h->buffer != NULL)
return(doBufferedWrite(handle, buffer, objSize, objCount));
return(h->funcs->write(h, buffer, objSize, objCount));
} /* PHYSFS_write */
int PHYSFS_eof(PHYSFS_file *handle)
{
FileHandle *h = (FileHandle *) handle->opaque;
if (!h->forReading) /* never EOF on files opened for write/append. */
return(0);
/* eof if buffer is empty and archiver says so. */
return((h->bufpos == h->buffill) && (h->funcs->eof(h)));
} /* PHYSFS_eof */
PHYSFS_sint64 PHYSFS_tell(PHYSFS_file *handle)
{
FileHandle *h = (FileHandle *) handle->opaque;
PHYSFS_sint64 retval = h->forReading ?
(h->funcs->tell(h) - h->buffill) + h->bufpos :
(h->funcs->tell(h) + h->buffill);
return(retval);
} /* PHYSFS_tell */
int PHYSFS_seek(PHYSFS_file *handle, PHYSFS_uint64 pos)
{
FileHandle *h = (FileHandle *) handle->opaque;
BAIL_IF_MACRO(!PHYSFS_flush(handle), NULL, 0);
if (h->buffer && h->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 <= h->buffill - h->bufpos)) /* forwards */
|| ((offset < 0) && (-offset <= h->bufpos)) /* backwards */ )
{
h->bufpos += offset;
return(1); /* successful seek */
} /* if */
} /* if */
/* we have to fall back to a 'raw' seek. */
h->buffill = h->bufpos = 0;
return(h->funcs->seek(h, pos));
} /* PHYSFS_seek */
PHYSFS_sint64 PHYSFS_fileLength(PHYSFS_file *handle)
{
FileHandle *h = (FileHandle *) handle->opaque;
return(h->funcs->fileLength(h));
} /* PHYSFS_filelength */
int PHYSFS_setBuffer(PHYSFS_file *handle, PHYSFS_uint64 _bufsize)
{
FileHandle *h = (FileHandle *) handle->opaque;
PHYSFS_uint32 bufsize = (PHYSFS_uint32) _bufsize;
BAIL_IF_MACRO(_bufsize > 0xFFFFFFFF, "buffer must fit in 32-bits", 0);
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 ((h->forReading) && (h->buffill != h->bufpos))
{
PHYSFS_uint64 pos;
PHYSFS_sint64 curpos = h->funcs->tell(h);
BAIL_IF_MACRO(curpos == -1, NULL, 0);
pos = ((curpos - h->buffill) + h->bufpos);
BAIL_IF_MACRO(!h->funcs->seek(h, pos), NULL, 0);
} /* if */
if (bufsize == 0) /* delete existing buffer. */
{
if (h->buffer != NULL)
{
free(h->buffer);
h->buffer = NULL;
} /* if */
} /* if */
else
{
PHYSFS_uint8 *newbuf = realloc(h->buffer, bufsize);
BAIL_IF_MACRO(newbuf == NULL, ERR_OUT_OF_MEMORY, 0);
h->buffer = newbuf;
} /* else */
h->bufsize = bufsize;
h->buffill = h->bufpos = 0;
return(1);
} /* PHYSFS_setBuffer */
int PHYSFS_flush(PHYSFS_file *handle)
{
FileHandle *h = (FileHandle *) handle->opaque;
PHYSFS_sint64 rc;
if ((h->forReading) || (h->bufpos == h->buffill))
return(1); /* open for read or buffer empty are successful no-ops. */
/* dump buffer to disk. */
rc = h->funcs->write(h, h->buffer + h->bufpos, h->buffill - h->bufpos, 1);
BAIL_IF_MACRO(rc <= 0, NULL, 0);
h->bufpos = h->buffill = 0;
return(1);
} /* PHYSFS_flush */
LinkedStringList *__PHYSFS_addToLinkedStringList(LinkedStringList *retval,
LinkedStringList **prev,
const char *str,
PHYSFS_sint32 len)
{
LinkedStringList *l;
l = (LinkedStringList *) malloc(sizeof (LinkedStringList));
BAIL_IF_MACRO(l == NULL, ERR_OUT_OF_MEMORY, retval);
if (len < 0)
len = strlen(str);
l->str = (char *) malloc(len + 1);
if (l->str == NULL)
{
free(l);
BAIL_MACRO(ERR_OUT_OF_MEMORY, retval);
} /* if */
strncpy(l->str, str, len);
l->str[len] = '\0';
if (retval == NULL)
retval = l;
else
(*prev)->next = l;
*prev = l;
l->next = NULL;
return(retval);
} /* __PHYSFS_addToLinkedStringList */
/* end of physfs.c ... */
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