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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.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
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#include <fcntl.h>
#include <errno.h>
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#include <assert.h>
#include "physfs.h"
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#define __PHYSICSFS_INTERNAL__
#include "physfs_internal.h"
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typedef struct __PHYSFS_ERRMSGTYPE__
{
int tid;
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;
} DirInfo;
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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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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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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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&__PHYSFS_DirFunctions_DIR,
NULL
};
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/* General PhysicsFS state ... */
static int initialized = 0;
static ErrMsg *errorMessages = NULL;
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static DirInfo *searchPath = NULL;
static DirInfo *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;
/* functions ... */
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static ErrMsg *findErrorForCurrentThread(void)
{
ErrMsg *i;
int tid;
if (errorMessages != NULL)
{
tid = __PHYSFS_platformGetThreadID();
for (i = errorMessages; i != NULL; i = i->next)
{
if (i->tid == tid)
return(i);
} /* for */
} /* if */
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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err->next = errorMessages;
errorMessages = err;
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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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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 */
} /* freeErrorMessages */
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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 */
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 DirHandle *openDirectory(const char *d, int forWriting)
{
const DirFunctions **i;
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BAIL_IF_MACRO(!__PHYSFS_platformExists(d), ERR_NO_SUCH_FILE, NULL);
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for (i = dirFunctions; *i != NULL; i++)
{
if ((*i)->isArchive(d, forWriting))
return( (*i)->openArchive(d, forWriting) );
} /* for */
__PHYSFS_setError(ERR_UNSUPPORTED_ARCHIVE);
return(NULL);
} /* openDirectory */
static DirInfo *buildDirInfo(const char *newDir, int forWriting)
{
DirHandle *dirHandle = NULL;
DirInfo *di = NULL;
BAIL_IF_MACRO(newDir == NULL, ERR_INVALID_ARGUMENT, 0);
dirHandle = openDirectory(newDir, forWriting);
BAIL_IF_MACRO(dirHandle == NULL, NULL, 0);
di = (DirInfo *) malloc(sizeof (DirInfo));
if (di == NULL)
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dirHandle->funcs->dirClose(dirHandle);
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BAIL_IF_MACRO(di == NULL, ERR_OUT_OF_MEMORY, 0);
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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__PHYSFS_setError(ERR_OUT_OF_MEMORY);
return(0);
} /* if */
di->next = NULL;
di->dirHandle = dirHandle;
strcpy(di->dirName, newDir);
return(di);
} /* buildDirInfo */
static int freeDirInfo(DirInfo *di, FileHandleList *openList)
{
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) +
(strlen(dirsep) * 2) + 6);
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if (retval == NULL)
__PHYSFS_setError(ERR_OUT_OF_MEMORY);
else
sprintf(retval, "%s%susers%s%s", baseDir, dirsep, dirsep, str);
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 */
size = (size_t) (ptr - argv0); /* !!! is this portable? */
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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int PHYSFS_init(const char *argv0)
{
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char *ptr;
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BAIL_IF_MACRO(initialized, ERR_IS_INITIALIZED, 0);
BAIL_IF_MACRO(argv0 == NULL, ERR_INVALID_ARGUMENT, 0);
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baseDir = calculateBaseDir(argv0);
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BAIL_IF_MACRO(baseDir == NULL, NULL, 0);
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ptr = __PHYSFS_platformRealPath(baseDir);
free(baseDir);
BAIL_IF_MACRO(ptr == NULL, NULL, 0);
baseDir = ptr;
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BAIL_IF_MACRO(!appendDirSep(&baseDir), NULL, 0);
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userDir = calculateUserDir();
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if (userDir != NULL)
{
ptr = __PHYSFS_platformRealPath(userDir);
free(userDir);
userDir = ptr;
} /* if */
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if ((userDir == NULL) || (!appendDirSep(&userDir)))
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{
free(baseDir);
baseDir = NULL;
return(0);
} /* if */
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initialized = 1;
return(1);
} /* PHYSFS_init */
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static int closeFileHandleList(FileHandleList **list)
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{
FileHandleList *i;
FileHandleList *next = NULL;
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FileHandle *h;
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for (i = *list; i != NULL; i = next)
{
next = i->next;
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h = (FileHandle *) (i->handle.opaque);
if (!h->funcs->fileClose(h))
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{
*list = i;
return(0);
} /* if */
free(i);
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} /* for */
*list = NULL;
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return(1);
} /* closeFileHandleList */
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static void freeSearchPath(void)
{
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DirInfo *i;
DirInfo *next = NULL;
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closeFileHandleList(&openReadList);
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if (searchPath != NULL)
{
for (i = searchPath; i != NULL; i = next)
{
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next = i->next;
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freeDirInfo(i, openReadList);
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} /* for */
searchPath = NULL;
} /* if */
} /* freeSearchPath */
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int PHYSFS_deinit(void)
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{
BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0);
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closeFileHandleList(&openWriteList);
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BAIL_IF_MACRO(!PHYSFS_setWriteDir(NULL), ERR_FILES_STILL_OPEN, 0);
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freeSearchPath();
freeErrorMessages();
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if (baseDir != NULL)
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{
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free(baseDir);
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baseDir = NULL;
} /* if */
if (userDir != NULL)
{
free(userDir);
userDir = NULL;
} /* if */
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allowSymLinks = 0;
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initialized = 0;
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)
{
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return(__PHYSFS_platformDirSeparator);
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} /* 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)
{
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return(userDir); /* this is calculated in PHYSFS_init()... */
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} /* PHYSFS_getUserDir */
const char *PHYSFS_getWriteDir(void)
{
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if (writeDir == NULL)
return(NULL);
return(writeDir->dirName);
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} /* PHYSFS_getWriteDir */
int PHYSFS_setWriteDir(const char *newDir)
{
if (writeDir != NULL)
{
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BAIL_IF_MACRO(!freeDirInfo(writeDir, openWriteList), NULL, 0);
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writeDir = NULL;
} /* if */
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if (newDir != NULL)
{
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writeDir = buildDirInfo(newDir, 1);
return(writeDir != NULL);
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} /* if */
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return(1);
} /* PHYSFS_setWriteDir */
int PHYSFS_addToSearchPath(const char *newDir, int appendToPath)
{
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DirInfo *di;
DirInfo *i = searchPath;
DirInfo *prev = NULL;
while (i != NULL)
{
if (strcmp(newDir, i->dirName) == 0) /* already in search path. */
return(1);
prev = i;
i = i->next;
} /* while */
di = buildDirInfo(newDir, 0);
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BAIL_IF_MACRO(di == NULL, NULL, 0);
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if (appendToPath)
{
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di->next = NULL;
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if (prev == NULL)
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searchPath = di;
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else
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prev->next = di;
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} /* if */
else
{
di->next = searchPath;
searchPath = di;
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} /* else */
return(1);
} /* PHYSFS_addToSearchPath */
int PHYSFS_removeFromSearchPath(const char *oldDir)
{
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DirInfo *i;
DirInfo *prev = NULL;
DirInfo *next = NULL;
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BAIL_IF_MACRO(oldDir == NULL, ERR_INVALID_ARGUMENT, 0);
for (i = searchPath; i != NULL; i = i->next)
{
if (strcmp(i->dirName, oldDir) == 0)
{
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next = i->next;
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BAIL_IF_MACRO(!freeDirInfo(i, openReadList), NULL, 0);
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if (prev == NULL)
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searchPath = next;
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else
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prev->next = next;
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return(1);
} /* if */
prev = i;
} /* for */
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__PHYSFS_setError(ERR_NOT_IN_SEARCH_PATH);
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return(0);
} /* PHYSFS_removeFromSearchPath */
char **PHYSFS_getSearchPath(void)
{
int count = 1;
int x;
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DirInfo *i;
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char **retval;
for (i = searchPath; i != NULL; i = i->next)
count++;
retval = (char **) malloc(sizeof (char *) * count);
BAIL_IF_MACRO(!retval, ERR_OUT_OF_MEMORY, 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);
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__PHYSFS_setError(ERR_OUT_OF_MEMORY);
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return(NULL);
} /* if */
strcpy(retval[x], i->dirName);
} /* for */
return(retval);
} /* PHYSFS_getSearchPath */
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int PHYSFS_setSaneConfig(const char *organization, const char *appName,
const char *archiveExt, int includeCdRoms,
int archivesFirst)
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{
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const char *basedir = PHYSFS_getBaseDir();
const char *userdir = PHYSFS_getUserDir();
const char *dirsep = PHYSFS_getDirSeparator();
char *str;
/* set write dir... */
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str = malloc(strlen(userdir) + (strlen(organization) * 2) +
(strlen(appName) * 2) + (strlen(dirsep) * 3) + 2);
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BAIL_IF_MACRO(str == NULL, ERR_OUT_OF_MEMORY, 0);
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sprintf(str, "%s.%s%s%s", userdir, organization, dirsep, appName);
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if (!PHYSFS_setWriteDir(str))
{
if ( (!PHYSFS_setWriteDir(userdir)) ||
(!PHYSFS_mkdir(str + strlen(userdir))) )
{
PHYSFS_setWriteDir(NULL);
free(str);
BAIL_IF_MACRO(1, ERR_CANT_SET_WRITE_DIR, 0);
} /* if */
} /* if */
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/* Put write dir related dirs on search path... */
PHYSFS_addToSearchPath(str, 1);
free(str);
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/* Put base path on search path... */
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PHYSFS_addToSearchPath(basedir, 1);
/* handle CD-ROMs... */
if (includeCdRoms)
{
char **cds = PHYSFS_getCdRomDirs();
char **i;
for (i = cds; *i != NULL; i++)
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PHYSFS_addToSearchPath(*i, 1);
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PHYSFS_freeList(cds);
} /* if */
/* Root out archives, and add them to search path... */
if (archiveExt != NULL)
{
char **rc = PHYSFS_enumerateFiles("");
char **i;
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size_t extlen = strlen(archiveExt);
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char *ext;
for (i = rc; *i != NULL; i++)
{
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size_t l = strlen(*i);
if ((l > extlen) && ((*i)[l - extlen - 1] == '.'))
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{
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);
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PHYSFS_addToSearchPath(str, archivesFirst == 0);
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free(str);
} /* if */
} /* if */
} /* if */
} /* for */
PHYSFS_freeList(rc);
} /* if */
return(1);
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} /* PHYSFS_setSaneConfig */
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void PHYSFS_permitSymbolicLinks(int allow)
{
allowSymLinks = allow;
} /* PHYSFS_permitSymbolicLinks */
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/* string manipulation in C makes my ass itch. */
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char * __PHYSFS_convertToDependent(const char *prepend,
const char *dirName,
const char *append)
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{
const char *dirsep = PHYSFS_getDirSeparator();
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size_t sepsize = strlen(dirsep);
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char *str;
char *i1;
char *i2;
size_t allocSize;
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while (*dirName == '/')
dirName++;
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allocSize = strlen(dirName) + 1;
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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)
{
747
748
str = (char *) dirName;
do
749
{
750
751
752
str = strchr(str, '/');
if (str != NULL)
{
753
allocSize += (sepsize - 1);
754
755
756
str++;
} /* if */
} while (str != NULL);
757
758
759
760
761
} /* if */
str = (char *) malloc(allocSize);
BAIL_IF_MACRO(str == NULL, ERR_OUT_OF_MEMORY, NULL);
762
763
764
if (prepend == NULL)
*str = '\0';
else
765
766
767
{
strcpy(str, prepend);
strcat(str, dirsep);
768
} /* else */
769
770
for (i1 = (char *) dirName, i2 = str + strlen(str); *i1; i1++, i2++)
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
{
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);
791
} /* __PHYSFS_convertToDependentNotation */
792
793
794
int __PHYSFS_verifySecurity(DirHandle *h, const char *fname)
795
{
796
797
798
int retval = 1;
char *start;
char *end;
799
800
char *str;
801
802
803
start = str = malloc(strlen(fname) + 1);
BAIL_IF_MACRO(str == NULL, ERR_OUT_OF_MEMORY, 0);
strcpy(str, fname);
804
805
806
807
808
809
810
811
812
while (1)
{
end = strchr(start, '/');
if (end != NULL)
*end = '\0';
if ( (strcmp(start, ".") == 0) ||
(strcmp(start, "..") == 0) ||
813
(strchr(start, '\\') != NULL) ||
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
(strchr(start, ':') != NULL) )
{
__PHYSFS_setError(ERR_INSECURE_FNAME);
retval = 0;
break;
} /* if */
if ((!allowSymLinks) && (h->funcs->isSymLink(h, str)))
{
__PHYSFS_setError(ERR_SYMLINK_DISALLOWED);
retval = 0;
break;
} /* if */
if (end == NULL)
break;
*end = '/';
start = end + 1;
} /* while */
834
835
free(str);
836
837
return(retval);
} /* __PHYSFS_verifySecurity */
838
839
840
int PHYSFS_mkdir(const char *dirName)
841
{
842
DirHandle *h;
843
char *str;
844
845
846
char *start;
char *end;
int retval = 0;
847
848
BAIL_IF_MACRO(writeDir == NULL, ERR_NO_WRITE_DIR, 0);
849
850
h = writeDir->dirHandle;
851
852
853
854
while (*dirName == '/')
dirName++;
855
856
BAIL_IF_MACRO(h->funcs->mkdir == NULL, ERR_NOT_SUPPORTED, 0);
BAIL_IF_MACRO(!__PHYSFS_verifySecurity(h, dirName), NULL, 0);
857
858
859
860
start = str = malloc(strlen(dirName) + 1);
BAIL_IF_MACRO(str == NULL, ERR_OUT_OF_MEMORY, 0);
strcpy(str, dirName);
861
862
863
864
865
866
while (1)
{
end = strchr(start, '/');
if (end != NULL)
*end = '\0';
867
868
869
870
retval = h->funcs->mkdir(h, str);
if (!retval)
break;
871
872
873
if (end == NULL)
break;
874
875
876
877
*end = '/';
start = end + 1;
} /* while */
878
879
880
881
882
883
884
free(str);
return(retval);
} /* PHYSFS_mkdir */
int PHYSFS_delete(const char *fname)
885
{
886
887
888
889
DirHandle *h;
BAIL_IF_MACRO(writeDir == NULL, ERR_NO_WRITE_DIR, 0);
h = writeDir->dirHandle;
BAIL_IF_MACRO(h->funcs->remove == NULL, ERR_NOT_SUPPORTED, 0);
890
891
892
893
while (*fname == '/')
fname++;
894
895
896
BAIL_IF_MACRO(!__PHYSFS_verifySecurity(h, fname), NULL, 0);
return(h->funcs->remove(h, fname));
} /* PHYSFS_delete */
897
898
899
900
const char *PHYSFS_getRealDir(const char *filename)
{
901
902
DirInfo *i;
903
904
905
while (*filename == '/')
filename++;
906
907
908
909
910
911
912
913
914
915
916
for (i = searchPath; i != NULL; i = i->next)
{
DirHandle *h = i->dirHandle;
if (__PHYSFS_verifySecurity(h, filename))
{
if (h->funcs->exists(h, filename))
return(i->dirName);
} /* if */
} /* for */
return(NULL);
917
918
919
} /* PHYSFS_getRealDir */
920
static int countList(LinkedStringList *list)
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
{
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 */
953
if (retval != NULL)
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
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);
970
971
972
if (rc > 0) /* insertion point. */
break;
else if (rc == 0) /* already in list. */
973
974
975
976
977
978
979
{
free(item->str);
free(item);
return;
} /* else if */
prev = i;
} /* for */
980
981
982
983
984
985
986
987
988
989
990
/*
* 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;
991
992
993
994
995
996
997
998
999
1000
} /* 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)