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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.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include <errno.h>
#include <assert.h>
#include "physfs.h"
#define __PHYSICSFS_INTERNAL__
#include "physfs_internal.h"
typedef struct __PHYSFS_ERRMSGTYPE__
{
int tid;
int errorAvailable;
char errorString[80];
struct __PHYSFS_ERRMSGTYPE__ *next;
} ErrMsg;
typedef struct __PHYSFS_DIRINFO__
{
char *dirName;
DirHandle *dirHandle;
struct __PHYSFS_DIRINFO__ *next;
} DirInfo;
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
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
NULL
};
static const DirFunctions *dirFunctions[] =
{
#if (defined PHYSFS_SUPPORTS_ZIP)
&__PHYSFS_DirFunctions_ZIP,
#endif
#if (defined PHYSFS_SUPPORTS_GRP)
&__PHYSFS_DirFunctions_GRP,
#endif
&__PHYSFS_DirFunctions_DIR,
NULL
};
/* General PhysicsFS state ... */
static int initialized = 0;
static ErrMsg *errorMessages = NULL;
static DirInfo *searchPath = NULL;
static DirInfo *writeDir = NULL;
static FileHandleList *openWriteList = NULL;
static FileHandleList *openReadList = NULL;
static char *baseDir = NULL;
static char *userDir = NULL;
static int allowSymLinks = 0;
/* functions ... */
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 */
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();
err->next = errorMessages;
errorMessages = err;
} /* if */
err->errorAvailable = 1;
strncpy(err->errorString, str, sizeof (err->errorString));
err->errorString[sizeof (err->errorString) - 1] = '\0';
} /* __PHYSFS_setError */
static void freeErrorMessages(void)
{
ErrMsg *i;
ErrMsg *next;
for (i = errorMessages; i != NULL; i = next)
{
next = i->next;
free(i);
} /* for */
} /* freeErrorMessages */
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 */
static DirHandle *openDirectory(const char *d, int forWriting)
{
const DirFunctions **i;
BAIL_IF_MACRO(!__PHYSFS_platformExists(d), ERR_NO_SUCH_FILE, NULL);
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)
dirHandle->funcs->dirClose(dirHandle);
BAIL_IF_MACRO(di == NULL, ERR_OUT_OF_MEMORY, 0);
di->dirName = (char *) malloc(strlen(newDir) + 1);
if (di->dirName == NULL)
{
free(di);
dirHandle->funcs->dirClose(dirHandle);
__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)
{
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) * 2) + 6);
if (retval == NULL)
__PHYSFS_setError(ERR_OUT_OF_MEMORY);
else
sprintf(retval, "%s%susers%s%s", baseDir, dirsep, 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); /* !!! 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*)
*/
return(__PHYSFS_platformCurrentDir());
} /* calculateBaseDir */
int PHYSFS_init(const char *argv0)
{
char *ptr;
BAIL_IF_MACRO(initialized, ERR_IS_INITIALIZED, 0);
BAIL_IF_MACRO(argv0 == NULL, ERR_INVALID_ARGUMENT, 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;
return(1);
} /* PHYSFS_init */
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 */
static void freeSearchPath(void)
{
DirInfo *i;
DirInfo *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);
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;
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)
{
if (writeDir == NULL)
return(NULL);
return(writeDir->dirName);
} /* PHYSFS_getWriteDir */
int PHYSFS_setWriteDir(const char *newDir)
{
if (writeDir != NULL)
{
BAIL_IF_MACRO(!freeDirInfo(writeDir, openWriteList), NULL, 0);
writeDir = NULL;
} /* if */
if (newDir != NULL)
{
writeDir = buildDirInfo(newDir, 1);
return(writeDir != NULL);
} /* if */
return(1);
} /* PHYSFS_setWriteDir */
int PHYSFS_addToSearchPath(const char *newDir, int appendToPath)
{
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);
BAIL_IF_MACRO(di == NULL, NULL, 0);
if (appendToPath)
{
di->next = NULL;
if (prev == NULL)
searchPath = di;
else
prev->next = di;
} /* if */
else
{
di->next = searchPath;
searchPath = di;
} /* else */
return(1);
} /* PHYSFS_addToSearchPath */
int PHYSFS_removeFromSearchPath(const char *oldDir)
{
DirInfo *i;
DirInfo *prev = NULL;
DirInfo *next = NULL;
BAIL_IF_MACRO(oldDir == NULL, ERR_INVALID_ARGUMENT, 0);
for (i = searchPath; i != NULL; i = i->next)
{
if (strcmp(i->dirName, oldDir) == 0)
{
next = i->next;
BAIL_IF_MACRO(!freeDirInfo(i, openReadList), NULL, 0);
if (prev == NULL)
searchPath = next;
else
prev->next = next;
return(1);
} /* if */
prev = i;
} /* for */
__PHYSFS_setError(ERR_NOT_IN_SEARCH_PATH);
return(0);
} /* PHYSFS_removeFromSearchPath */
char **PHYSFS_getSearchPath(void)
{
int count = 1;
int x;
DirInfo *i;
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);
__PHYSFS_setError(ERR_OUT_OF_MEMORY);
return(NULL);
} /* if */
strcpy(retval[x], i->dirName);
} /* for */
return(retval);
} /* PHYSFS_getSearchPath */
int PHYSFS_setSaneConfig(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;
/* set write dir... */
str = malloc(strlen(userdir) + (strlen(appName) * 2) +
(strlen(dirsep) * 2) + 2);
BAIL_IF_MACRO(str == NULL, ERR_OUT_OF_MEMORY, 0);
sprintf(str, "%s.%s", userdir, appName);
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 */
if (!PHYSFS_setWriteDir(str))
{
PHYSFS_setWriteDir(NULL);
free(str);
BAIL_IF_MACRO(1, ERR_CANT_SET_WRITE_DIR, 0);
} /* if */
/* Put write dir related dirs on search path... */
PHYSFS_addToSearchPath(str, 1);
PHYSFS_mkdir(appName); /* don't care if this fails. */
strcat(str, dirsep);
strcat(str, appName);
PHYSFS_addToSearchPath(str, 1);
free(str);
/* Put base path stuff on search path... */
PHYSFS_addToSearchPath(basedir, 1);
str = malloc(strlen(basedir) + (strlen(appName) * 2) +
(strlen(dirsep) * 2) + 2);
if (str != NULL)
{
sprintf(str, "%s.%s", basedir, appName);
PHYSFS_addToSearchPath(str, 1);
free(str);
} /* if */
/* handle CD-ROMs... */
if (includeCdRoms)
{
char **cds = PHYSFS_getCdRomDirs();
char **i;
for (i = cds; *i != NULL; i++)
{
PHYSFS_addToSearchPath(*i, 1);
str = malloc(strlen(*i) + strlen(appName) + strlen(dirsep) + 1);
if (str != NULL)
{
sprintf(str, "%s%s%s", *i, dirsep, appName);
PHYSFS_addToSearchPath(str, 1);
free(str);
} /* if */
} /* for */
PHYSFS_freeList(cds);
} /* if */
/* Root out archives, and add them to search path... */
if (archiveExt != NULL)
{
char **rc = PHYSFS_enumerateFiles("");
char **i;
int extlen = strlen(archiveExt);
char *ext;
for (i = rc; *i != NULL; i++)
{
int 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_getDirSeparator();
int 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_convertToDependentNotation */
int __PHYSFS_verifySecurity(DirHandle *h, const char *fname)
{
int retval = 1;
char *start;
char *end;
char *str;
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) && (h->funcs->isSymLink(h, str)))
{
__PHYSFS_setError(ERR_SYMLINK_DISALLOWED);
retval = 0;
break;
} /* if */
if (end == NULL)
break;
*end = '/';
start = end + 1;
} /* while */
free(str);
return(retval);
} /* __PHYSFS_verifySecurity */
int PHYSFS_mkdir(const char *dirName)
{
DirHandle *h;
char *str;
char *start;
char *end;
int retval = 0;
BAIL_IF_MACRO(writeDir == NULL, ERR_NO_WRITE_DIR, 0);
h = writeDir->dirHandle;
while (*dirName == '/')
dirName++;
BAIL_IF_MACRO(h->funcs->mkdir == NULL, ERR_NOT_SUPPORTED, 0);
BAIL_IF_MACRO(!__PHYSFS_verifySecurity(h, dirName), NULL, 0);
start = str = malloc(strlen(dirName) + 1);
BAIL_IF_MACRO(str == NULL, ERR_OUT_OF_MEMORY, 0);
strcpy(str, dirName);
while (1)
{
end = strchr(start, '/');
if (end != NULL)
*end = '\0';
retval = h->funcs->mkdir(h, str);
if (!retval)
break;
if (end == NULL)
break;
*end = '/';
start = end + 1;
} /* while */
free(str);
return(retval);
} /* PHYSFS_mkdir */
int PHYSFS_delete(const char *fname)
{
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);
while (*fname == '/')
fname++;
BAIL_IF_MACRO(!__PHYSFS_verifySecurity(h, fname), NULL, 0);
return(h->funcs->remove(h, fname));
} /* PHYSFS_delete */
const char *PHYSFS_getRealDir(const char *filename)
{
DirInfo *i;
while (*filename == '/')
filename++;
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);
} /* 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)
{
DirInfo *i;
char **retval = NULL;
LinkedStringList *rc;
LinkedStringList *finalList = NULL;
int omitSymLinks = !allowSymLinks;
while (*path == '/')
path++;
for (i = searchPath; i != NULL; i = i->next)
{
DirHandle *h = i->dirHandle;
if (__PHYSFS_verifySecurity(h, path))
{
rc = h->funcs->enumerateFiles(h, path, omitSymLinks);
interpolateStringLists(&finalList, rc);
} /* if */
} /* for */
retval = convertStringListToPhysFSList(finalList);
return(retval);
} /* PHYSFS_enumerateFiles */
int PHYSFS_exists(const char *fname)
{
while (*fname == '/')
fname++;
return(PHYSFS_getRealDir(fname) != NULL);
} /* PHYSFS_exists */
int PHYSFS_isDirectory(const char *fname)
{
DirInfo *i;
while (*fname == '/')
fname++;
if (*fname == '\0')
return(1);
for (i = searchPath; i != NULL; i = i->next)
{
DirHandle *h = i->dirHandle;
if (__PHYSFS_verifySecurity(h, fname))
{
if (h->funcs->exists(h, fname))
return(h->funcs->isDirectory(h, fname));
} /* if */
} /* for */
return(0);
} /* PHYSFS_isDirectory */
int PHYSFS_isSymbolicLink(const char *fname)
{
DirInfo *i;
if (!allowSymLinks)
return(0);
while (*fname == '/')
fname++;
for (i = searchPath; i != NULL; i = i->next)
{
DirHandle *h = i->dirHandle;
if (__PHYSFS_verifySecurity(h, fname))
{
if (h->funcs->exists(h, fname))
return(h->funcs->isSymLink(h, fname));
} /* if */
} /* for */
return(0);
} /* PHYSFS_isSymbolicLink */
static PHYSFS_file *doOpenWrite(const char *fname, int appending)
{
PHYSFS_file *retval = NULL;
FileHandle *rc = NULL;
DirHandle *h = (writeDir == NULL) ? NULL : writeDir->dirHandle;
const DirFunctions *f = (h == NULL) ? NULL : h->funcs;
FileHandleList *list;
while (*fname == '/')
fname++;
BAIL_IF_MACRO(!h, ERR_NO_WRITE_DIR, NULL);
BAIL_IF_MACRO(!__PHYSFS_verifySecurity(h, fname), NULL, NULL);
list = (FileHandleList *) malloc(sizeof (FileHandleList));
BAIL_IF_MACRO(!list, ERR_OUT_OF_MEMORY, NULL);
rc = (appending) ? f->openAppend(h, fname) : f->openWrite(h, fname);
if (rc == NULL)
free(list);
else
{
list->handle.opaque = (void *) rc;
list->next = openWriteList;
openWriteList = list;
retval = &(list->handle);
} /* else */
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)
{
FileHandle *rc = NULL;
FileHandleList *list;
DirInfo *i;
while (*fname == '/')
fname++;
for (i = searchPath; i != NULL; i = i->next)
{
DirHandle *h = i->dirHandle;
if (__PHYSFS_verifySecurity(h, fname))
{
rc = h->funcs->openRead(h, fname);
if (rc != NULL)
break;
} /* if */
} /* for */
if (rc == NULL)
return(NULL);
list = (FileHandleList *) malloc(sizeof (FileHandleList));
BAIL_IF_MACRO(!list, ERR_OUT_OF_MEMORY, NULL);
list->handle.opaque = (void *) rc;
list->next = openReadList;
openReadList = list;
return(&(list->handle));
} /* PHYSFS_openRead */
static int closeHandleInOpenList(FileHandleList **list, PHYSFS_file *handle)
{
FileHandle *h = (FileHandle *) handle->opaque;
FileHandleList *prev = NULL;
FileHandleList *i;
int rc;
for (i = *list; i != NULL; i = i->next)
{
if (&i->handle == handle) /* handle is in this list? */
{
rc = h->funcs->fileClose(h);
if (!rc)
return(-1);
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;
/* -1 == close failure. 0 == not found. 1 == success. */
rc = closeHandleInOpenList(&openReadList, handle);
BAIL_IF_MACRO(rc == -1, NULL, 0);
if (!rc)
{
rc = closeHandleInOpenList(&openWriteList, handle);
BAIL_IF_MACRO(rc == -1, NULL, 0);
} /* if */
if (!rc)
__PHYSFS_setError(ERR_NOT_A_HANDLE);
return(rc);
} /* PHYSFS_close */
int PHYSFS_read(PHYSFS_file *handle, void *buffer,
unsigned int objSize, unsigned int objCount)
{
FileHandle *h = (FileHandle *) handle->opaque;
assert(h != NULL);
assert(h->funcs != NULL);
BAIL_IF_MACRO(h->funcs->read == NULL, ERR_NOT_SUPPORTED, -1);
return(h->funcs->read(h, buffer, objSize, objCount));
} /* PHYSFS_read */
int PHYSFS_write(PHYSFS_file *handle, void *buffer,
unsigned int objSize, unsigned int objCount)
{
FileHandle *h = (FileHandle *) handle->opaque;
assert(h != NULL);
assert(h->funcs != NULL);
BAIL_IF_MACRO(h->funcs->write == NULL, ERR_NOT_SUPPORTED, -1);
return(h->funcs->write(h, buffer, objSize, objCount));
} /* PHYSFS_write */
int PHYSFS_eof(PHYSFS_file *handle)
{
FileHandle *h = (FileHandle *) handle->opaque;
assert(h != NULL);
assert(h->funcs != NULL);
BAIL_IF_MACRO(h->funcs->eof == NULL, ERR_NOT_SUPPORTED, -1);
return(h->funcs->eof(h));
} /* PHYSFS_eof */
int PHYSFS_tell(PHYSFS_file *handle)
{
FileHandle *h = (FileHandle *) handle->opaque;
assert(h != NULL);
assert(h->funcs != NULL);
BAIL_IF_MACRO(h->funcs->tell == NULL, ERR_NOT_SUPPORTED, -1);
return(h->funcs->tell(h));
} /* PHYSFS_tell */
int PHYSFS_seek(PHYSFS_file *handle, int pos)
{
FileHandle *h = (FileHandle *) handle->opaque;
assert(h != NULL);
assert(h->funcs != NULL);
BAIL_IF_MACRO(h->funcs->seek == NULL, ERR_NOT_SUPPORTED, 0);
BAIL_IF_MACRO(pos < 0, ERR_INVALID_ARGUMENT, 0);
return(h->funcs->seek(h, pos));
} /* PHYSFS_seek */
int PHYSFS_fileLength(PHYSFS_file *handle)
{
FileHandle *h = (FileHandle *) handle->opaque;
assert(h != NULL);
assert(h->funcs != NULL);
BAIL_IF_MACRO(h->funcs->fileLength == NULL, ERR_NOT_SUPPORTED, 0);
return(h->funcs->fileLength(h));
} /* PHYSFS_filelength */
/* end of physfs.c ... */
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