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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.
*/
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#if HAVE_CONFIG_H
# include <config.h>
#endif
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#if (defined PHYSFS_PROFILING)
#include <sys/time.h>
#include <unistd.h>
#endif
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
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#include <fcntl.h>
#include <errno.h>
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#include "physfs.h"
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#define __PHYSICSFS_INTERNAL__
#include "physfs_internal.h"
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typedef struct __PHYSFS_ERRMSGTYPE__
{
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PHYSFS_uint64 tid;
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int errorAvailable;
char errorString[80];
struct __PHYSFS_ERRMSGTYPE__ *next;
} ErrMsg;
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typedef struct __PHYSFS_DIRINFO__
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{
char *dirName;
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DirHandle *dirHandle;
struct __PHYSFS_DIRINFO__ *next;
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} PhysDirInfo;
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typedef struct __PHYSFS_FILEHANDLELIST__
{
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PHYSFS_file handle;
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struct __PHYSFS_FILEHANDLELIST__ *next;
} FileHandleList;
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/* The various i/o drivers... */
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#if (defined PHYSFS_SUPPORTS_ZIP)
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extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_ZIP;
extern const DirFunctions __PHYSFS_DirFunctions_ZIP;
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#endif
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#if (defined PHYSFS_SUPPORTS_GRP)
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_GRP;
extern const DirFunctions __PHYSFS_DirFunctions_GRP;
#endif
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#if (defined PHYSFS_SUPPORTS_QPAK)
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_QPAK;
extern const DirFunctions __PHYSFS_DirFunctions_QPAK;
#endif
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extern const DirFunctions __PHYSFS_DirFunctions_DIR;
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static const PHYSFS_ArchiveInfo *supported_types[] =
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{
#if (defined PHYSFS_SUPPORTS_ZIP)
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&__PHYSFS_ArchiveInfo_ZIP,
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#endif
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#if (defined PHYSFS_SUPPORTS_GRP)
&__PHYSFS_ArchiveInfo_GRP,
#endif
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#if (defined PHYSFS_SUPPORTS_QPAK)
&__PHYSFS_ArchiveInfo_QPAK,
#endif
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NULL
};
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static const DirFunctions *dirFunctions[] =
{
#if (defined PHYSFS_SUPPORTS_ZIP)
&__PHYSFS_DirFunctions_ZIP,
#endif
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#if (defined PHYSFS_SUPPORTS_GRP)
&__PHYSFS_DirFunctions_GRP,
#endif
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#if (defined PHYSFS_SUPPORTS_QPAK)
&__PHYSFS_DirFunctions_QPAK,
#endif
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&__PHYSFS_DirFunctions_DIR,
NULL
};
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/* General PhysicsFS state ... */
static int initialized = 0;
static ErrMsg *errorMessages = NULL;
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static PhysDirInfo *searchPath = NULL;
static PhysDirInfo *writeDir = NULL;
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static FileHandleList *openWriteList = NULL;
static FileHandleList *openReadList = NULL;
static char *baseDir = NULL;
static char *userDir = NULL;
static int allowSymLinks = 0;
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/* mutexes ... */
static void *errorLock = NULL; /* protects error message list. */
static void *stateLock = NULL; /* protects other PhysFS static state. */
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/* functions ... */
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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 */
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
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static ErrMsg *findErrorForCurrentThread(void)
{
ErrMsg *i;
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PHYSFS_uint64 tid;
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if (errorLock != NULL)
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__PHYSFS_platformGrabMutex(errorLock);
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if (errorMessages != NULL)
{
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tid = __PHYSFS_platformGetThreadID();
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for (i = errorMessages; i != NULL; i = i->next)
{
if (i->tid == tid)
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{
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if (errorLock != NULL)
__PHYSFS_platformReleaseMutex(errorLock);
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return(i);
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} /* if */
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} /* for */
} /* if */
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if (errorLock != NULL)
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__PHYSFS_platformReleaseMutex(errorLock);
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return(NULL); /* no error available. */
} /* findErrorForCurrentThread */
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void __PHYSFS_setError(const char *str)
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{
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ErrMsg *err;
if (str == NULL)
return;
err = findErrorForCurrentThread();
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if (err == NULL)
{
err = (ErrMsg *) malloc(sizeof (ErrMsg));
if (err == NULL)
return; /* uhh...? */
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memset((void *) err, '\0', sizeof (ErrMsg));
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err->tid = __PHYSFS_platformGetThreadID();
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if (errorLock != NULL)
__PHYSFS_platformGrabMutex(errorLock);
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err->next = errorMessages;
errorMessages = err;
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if (errorLock != NULL)
__PHYSFS_platformReleaseMutex(errorLock);
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} /* if */
err->errorAvailable = 1;
strncpy(err->errorString, str, sizeof (err->errorString));
err->errorString[sizeof (err->errorString) - 1] = '\0';
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} /* __PHYSFS_setError */
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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! */
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static void freeErrorMessages(void)
{
ErrMsg *i;
ErrMsg *next;
for (i = errorMessages; i != NULL; i = next)
{
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next = i->next;
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free(i);
} /* for */
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errorMessages = NULL;
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} /* freeErrorMessages */
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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 */
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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 */
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static DirHandle *openDirectory(const char *d, int forWriting)
{
const DirFunctions **i;
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const char *ext;
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BAIL_IF_MACRO(!__PHYSFS_platformExists(d), ERR_NO_SUCH_FILE, NULL);
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ext = find_filename_extension(d);
if (ext != NULL)
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{
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/* 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 */
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__PHYSFS_setError(ERR_UNSUPPORTED_ARCHIVE);
return(NULL);
} /* openDirectory */
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static PhysDirInfo *buildDirInfo(const char *newDir, int forWriting)
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{
DirHandle *dirHandle = NULL;
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PhysDirInfo *di = NULL;
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BAIL_IF_MACRO(newDir == NULL, ERR_INVALID_ARGUMENT, 0);
dirHandle = openDirectory(newDir, forWriting);
BAIL_IF_MACRO(dirHandle == NULL, NULL, 0);
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di = (PhysDirInfo *) malloc(sizeof (PhysDirInfo));
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if (di == NULL)
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{
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dirHandle->funcs->dirClose(dirHandle);
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BAIL_IF_MACRO(di == NULL, ERR_OUT_OF_MEMORY, 0);
} /* if */
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di->dirName = (char *) malloc(strlen(newDir) + 1);
if (di->dirName == NULL)
{
free(di);
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dirHandle->funcs->dirClose(dirHandle);
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BAIL_MACRO(ERR_OUT_OF_MEMORY, 0);
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} /* if */
di->next = NULL;
di->dirHandle = dirHandle;
strcpy(di->dirName, newDir);
return(di);
} /* buildDirInfo */
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/* MAKE SURE you've got the stateLock held before calling this! */
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static int freeDirInfo(PhysDirInfo *di, FileHandleList *openList)
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{
FileHandleList *i;
if (di == NULL)
return(1);
for (i = openList; i != NULL; i = i->next)
{
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const DirHandle *h = ((FileHandle *) &(i->handle.opaque))->dirHandle;
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BAIL_IF_MACRO(h == di->dirHandle, ERR_FILES_STILL_OPEN, 0);
} /* for */
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di->dirHandle->funcs->dirClose(di->dirHandle);
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free(di->dirName);
free(di);
return(1);
} /* freeDirInfo */
static char *calculateUserDir(void)
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{
char *retval = NULL;
const char *str = NULL;
str = __PHYSFS_platformGetUserDir();
if (str != NULL)
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retval = (char *) str;
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else
{
const char *dirsep = PHYSFS_getDirSeparator();
const char *uname = __PHYSFS_platformGetUserName();
str = (uname != NULL) ? uname : "default";
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retval = (char *) malloc(strlen(baseDir) + strlen(str) +
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strlen(dirsep) + 6);
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if (retval == NULL)
__PHYSFS_setError(ERR_OUT_OF_MEMORY);
else
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sprintf(retval, "%susers%s%s", baseDir, dirsep, str);
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if (uname != NULL)
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free((void *) uname);
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} /* else */
return(retval);
} /* calculateUserDir */
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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 */
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static char *calculateBaseDir(const char *argv0)
{
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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 */
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size = (size_t) (ptr - argv0);
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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*)
*/
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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);
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} /* calculateBaseDir */
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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 */
705
706
int PHYSFS_init(const char *argv0)
{
707
708
char *ptr;
709
BAIL_IF_MACRO(initialized, ERR_IS_INITIALIZED, 0);
710
BAIL_IF_MACRO(!__PHYSFS_platformInit(), NULL, 0);
711
712
713
BAIL_IF_MACRO(!initializeMutexes(), NULL, 0);
714
baseDir = calculateBaseDir(argv0);
715
BAIL_IF_MACRO(baseDir == NULL, NULL, 0);
716
717
718
719
720
721
ptr = __PHYSFS_platformRealPath(baseDir);
free(baseDir);
BAIL_IF_MACRO(ptr == NULL, NULL, 0);
baseDir = ptr;
722
BAIL_IF_MACRO(!appendDirSep(&baseDir), NULL, 0);
723
724
userDir = calculateUserDir();
725
726
727
728
729
730
731
if (userDir != NULL)
{
ptr = __PHYSFS_platformRealPath(userDir);
free(userDir);
userDir = ptr;
} /* if */
732
if ((userDir == NULL) || (!appendDirSep(&userDir)))
733
734
735
736
737
738
{
free(baseDir);
baseDir = NULL;
return(0);
} /* if */
739
initialized = 1;
740
741
742
/* This makes sure that the error subsystem is initialized. */
__PHYSFS_setError(PHYSFS_getLastError());
743
744
745
746
747
748
749
750
751
752
753
754
755
#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
756
757
758
759
return(1);
} /* PHYSFS_init */
760
/* MAKE SURE you hold stateLock before calling this! */
761
static int closeFileHandleList(FileHandleList **list)
762
763
764
{
FileHandleList *i;
FileHandleList *next = NULL;
765
FileHandle *h;
766
767
768
769
for (i = *list; i != NULL; i = next)
{
next = i->next;
770
771
h = (FileHandle *) (i->handle.opaque);
if (!h->funcs->fileClose(h))
772
773
774
775
776
777
{
*list = i;
return(0);
} /* if */
free(i);
778
779
780
} /* for */
*list = NULL;
781
782
return(1);
} /* closeFileHandleList */
783
784
785
/* MAKE SURE you hold the stateLock before calling this! */
786
787
static void freeSearchPath(void)
{
788
789
PhysDirInfo *i;
PhysDirInfo *next = NULL;
790
791
792
closeFileHandleList(&openReadList);
793
794
795
796
if (searchPath != NULL)
{
for (i = searchPath; i != NULL; i = next)
{
797
next = i->next;
798
freeDirInfo(i, openReadList);
799
800
801
802
803
804
} /* for */
searchPath = NULL;
} /* if */
} /* freeSearchPath */
805
int PHYSFS_deinit(void)
806
807
{
BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0);
808
BAIL_IF_MACRO(!__PHYSFS_platformDeinit(), NULL, 0);
809
810
closeFileHandleList(&openWriteList);
811
812
BAIL_IF_MACRO(!PHYSFS_setWriteDir(NULL), ERR_FILES_STILL_OPEN, 0);
813
814
815
freeSearchPath();
freeErrorMessages();
816
if (baseDir != NULL)
817
{
818
free(baseDir);
819
820
821
822
823
824
825
826
baseDir = NULL;
} /* if */
if (userDir != NULL)
{
free(userDir);
userDir = NULL;
} /* if */
827
828
allowSymLinks = 0;
829
initialized = 0;
830
831
832
833
834
__PHYSFS_platformDestroyMutex(errorLock);
__PHYSFS_platformDestroyMutex(stateLock);
errorLock = stateLock = NULL;
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
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)
{
857
return(__PHYSFS_platformDirSeparator);
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
} /* 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)
{
875
return(userDir); /* this is calculated in PHYSFS_init()... */
876
877
878
879
880
} /* PHYSFS_getUserDir */
const char *PHYSFS_getWriteDir(void)
{
881
882
883
884
885
886
const char *retval = NULL;
__PHYSFS_platformGrabMutex(stateLock);
if (writeDir != NULL)
retval = writeDir->dirName;
__PHYSFS_platformReleaseMutex(stateLock);
887
888
return(retval);
889
890
891
892
893
} /* PHYSFS_getWriteDir */
int PHYSFS_setWriteDir(const char *newDir)
{
894
895
896
897
int retval = 1;
__PHYSFS_platformGrabMutex(stateLock);
898
899
if (writeDir != NULL)
{
900
901
BAIL_IF_MACRO_MUTEX(!freeDirInfo(writeDir, openWriteList), NULL,
stateLock, 0);
902
903
904
writeDir = NULL;
} /* if */
905
906
if (newDir != NULL)
{
907
writeDir = buildDirInfo(newDir, 1);
908
retval = (writeDir != NULL);
909
} /* if */
910
911
912
913
__PHYSFS_platformReleaseMutex(stateLock);
return(retval);
914
915
916
917
918
} /* PHYSFS_setWriteDir */
int PHYSFS_addToSearchPath(const char *newDir, int appendToPath)
{
919
920
921
PhysDirInfo *di;
PhysDirInfo *prev = NULL;
PhysDirInfo *i;
922
923
__PHYSFS_platformGrabMutex(stateLock);
924
925
926
927
928
for (i = searchPath; i != NULL; i = i->next)
{
/* already in search path? */
BAIL_IF_MACRO_MUTEX(strcmp(newDir, i->dirName)==0, NULL, stateLock, 1);
929
prev = i;
930
} /* for */
931
932
di = buildDirInfo(newDir, 0);
933
BAIL_IF_MACRO_MUTEX(di == NULL, NULL, stateLock, 0);
934
935
936
if (appendToPath)
{
937
di->next = NULL;
938
if (prev == NULL)
939
searchPath = di;
940
else
941
prev->next = di;
942
943
944
945
946
} /* if */
else
{
di->next = searchPath;
searchPath = di;
947
948
} /* else */
949
__PHYSFS_platformReleaseMutex(stateLock);
950
951
952
953
954
955
return(1);
} /* PHYSFS_addToSearchPath */
int PHYSFS_removeFromSearchPath(const char *oldDir)
{
956
957
958
PhysDirInfo *i;
PhysDirInfo *prev = NULL;
PhysDirInfo *next = NULL;
959
960
961
BAIL_IF_MACRO(oldDir == NULL, ERR_INVALID_ARGUMENT, 0);
962
__PHYSFS_platformGrabMutex(stateLock);
963
964
965
966
for (i = searchPath; i != NULL; i = i->next)
{
if (strcmp(i->dirName, oldDir) == 0)
{
967
next = i->next;
968
969
BAIL_IF_MACRO_MUTEX(!freeDirInfo(i, openReadList), NULL,
stateLock, 0);
970
971
if (prev == NULL)
972
searchPath = next;
973
else
974
prev->next = next;
975
976
BAIL_MACRO_MUTEX(NULL, stateLock, 1);
977
978
979
980
} /* if */
prev = i;
} /* for */
981
BAIL_MACRO_MUTEX(ERR_NOT_IN_SEARCH_PATH, stateLock, 0);
982
983
984
985
986
987
988
} /* PHYSFS_removeFromSearchPath */
char **PHYSFS_getSearchPath(void)
{
int count = 1;
int x;
989
PhysDirInfo *i;
990
991
char **retval;
992
993
__PHYSFS_platformGrabMutex(stateLock);
994
995
996
997
for (i = searchPath; i != NULL; i = i->next)
count++;
retval = (char **) malloc(sizeof (char *) * count);
998
BAIL_IF_MACRO_MUTEX(!retval, ERR_OUT_OF_MEMORY, stateLock, NULL);
999
1000
count--;
retval[count] = NULL;