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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))
{
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int no_write = 0;
sprintf(str, ".%s/%s", organization, appName);
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if ( (PHYSFS_setWriteDir(userdir)) &&
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(PHYSFS_mkdir(str)) )
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{
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sprintf(str, "%s.%s%s%s", userdir, organization, dirsep, appName);
if (!PHYSFS_setWriteDir(str))
no_write = 1;
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} /* if */
else
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{
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no_write = 1;
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} /* else */
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if (no_write)
{
PHYSFS_setWriteDir(NULL); /* just in case. */
free(str);
BAIL_MACRO(ERR_CANT_SET_WRITE_DIR, 0);
} /* if */
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} /* if */
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/* Put write dir first in search path... */
PHYSFS_addToSearchPath(str, 0);
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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;
748
749
750
while (*dirName == '/')
dirName++;
751
allocSize = strlen(dirName) + 1;
752
753
754
755
756
757
758
759
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)
{
760
761
str = (char *) dirName;
do
762
{
763
764
765
str = strchr(str, '/');
if (str != NULL)
{
766
allocSize += (sepsize - 1);
767
768
769
str++;
} /* if */
} while (str != NULL);
770
771
772
773
774
} /* if */
str = (char *) malloc(allocSize);
BAIL_IF_MACRO(str == NULL, ERR_OUT_OF_MEMORY, NULL);
775
776
777
if (prepend == NULL)
*str = '\0';
else
778
779
780
{
strcpy(str, prepend);
strcat(str, dirsep);
781
} /* else */
782
783
for (i1 = (char *) dirName, i2 = str + strlen(str); *i1; i1++, i2++)
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
{
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);
804
} /* __PHYSFS_convertToDependentNotation */
805
806
807
int __PHYSFS_verifySecurity(DirHandle *h, const char *fname)
808
{
809
810
811
int retval = 1;
char *start;
char *end;
812
813
char *str;
814
815
816
start = str = malloc(strlen(fname) + 1);
BAIL_IF_MACRO(str == NULL, ERR_OUT_OF_MEMORY, 0);
strcpy(str, fname);
817
818
819
820
821
822
823
824
825
while (1)
{
end = strchr(start, '/');
if (end != NULL)
*end = '\0';
if ( (strcmp(start, ".") == 0) ||
(strcmp(start, "..") == 0) ||
826
(strchr(start, '\\') != NULL) ||
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
(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 */
847
848
free(str);
849
850
return(retval);
} /* __PHYSFS_verifySecurity */
851
852
853
int PHYSFS_mkdir(const char *dirName)
854
{
855
DirHandle *h;
856
char *str;
857
858
859
char *start;
char *end;
int retval = 0;
860
861
BAIL_IF_MACRO(writeDir == NULL, ERR_NO_WRITE_DIR, 0);
862
863
h = writeDir->dirHandle;
864
865
866
867
while (*dirName == '/')
dirName++;
868
869
BAIL_IF_MACRO(h->funcs->mkdir == NULL, ERR_NOT_SUPPORTED, 0);
BAIL_IF_MACRO(!__PHYSFS_verifySecurity(h, dirName), NULL, 0);
870
871
872
873
start = str = malloc(strlen(dirName) + 1);
BAIL_IF_MACRO(str == NULL, ERR_OUT_OF_MEMORY, 0);
strcpy(str, dirName);
874
875
876
877
878
879
while (1)
{
end = strchr(start, '/');
if (end != NULL)
*end = '\0';
880
881
882
883
retval = h->funcs->mkdir(h, str);
if (!retval)
break;
884
885
886
if (end == NULL)
break;
887
888
889
890
*end = '/';
start = end + 1;
} /* while */
891
892
893
894
895
896
897
free(str);
return(retval);
} /* PHYSFS_mkdir */
int PHYSFS_delete(const char *fname)
898
{
899
900
901
902
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);
903
904
905
906
while (*fname == '/')
fname++;
907
908
909
BAIL_IF_MACRO(!__PHYSFS_verifySecurity(h, fname), NULL, 0);
return(h->funcs->remove(h, fname));
} /* PHYSFS_delete */
910
911
912
913
const char *PHYSFS_getRealDir(const char *filename)
{
914
915
DirInfo *i;
916
917
918
while (*filename == '/')
filename++;
919
920
921
922
923
924
925
926
927
928
929
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);
930
931
932
} /* PHYSFS_getRealDir */
933
static int countList(LinkedStringList *list)
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
{
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 */
966
if (retval != NULL)
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
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);
983
984
985
if (rc > 0) /* insertion point. */
break;
else if (rc == 0) /* already in list. */
986
987
988
989
990
991
992
{
free(item->str);
free(item);
return;
} /* else if */
prev = i;
} /* for */
993
994
995
996
997
998
999
1000
/*
* 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