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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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BAIL_IF_MACRO(!__PHYSFS_platformInit(), NULL, 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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BAIL_IF_MACRO(!__PHYSFS_platformDeinit(), NULL, 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();
744
size_t sepsize = strlen(dirsep);
745
746
747
748
749
char *str;
char *i1;
char *i2;
size_t allocSize;
750
751
752
while (*dirName == '/')
dirName++;
753
allocSize = strlen(dirName) + 1;
754
755
756
757
758
759
760
761
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)
{
762
763
str = (char *) dirName;
do
764
{
765
766
767
str = strchr(str, '/');
if (str != NULL)
{
768
allocSize += (sepsize - 1);
769
770
771
str++;
} /* if */
} while (str != NULL);
772
773
774
775
776
} /* if */
str = (char *) malloc(allocSize);
BAIL_IF_MACRO(str == NULL, ERR_OUT_OF_MEMORY, NULL);
777
778
779
if (prepend == NULL)
*str = '\0';
else
780
781
782
{
strcpy(str, prepend);
strcat(str, dirsep);
783
} /* else */
784
785
for (i1 = (char *) dirName, i2 = str + strlen(str); *i1; i1++, i2++)
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
{
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);
806
} /* __PHYSFS_convertToDependent */
807
808
809
int __PHYSFS_verifySecurity(DirHandle *h, const char *fname)
810
{
811
812
813
int retval = 1;
char *start;
char *end;
814
815
char *str;
816
817
818
start = str = malloc(strlen(fname) + 1);
BAIL_IF_MACRO(str == NULL, ERR_OUT_OF_MEMORY, 0);
strcpy(str, fname);
819
820
821
822
823
824
825
826
827
while (1)
{
end = strchr(start, '/');
if (end != NULL)
*end = '\0';
if ( (strcmp(start, ".") == 0) ||
(strcmp(start, "..") == 0) ||
828
(strchr(start, '\\') != NULL) ||
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
(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 */
849
850
free(str);
851
852
return(retval);
} /* __PHYSFS_verifySecurity */
853
854
855
int PHYSFS_mkdir(const char *dirName)
856
{
857
DirHandle *h;
858
char *str;
859
860
861
char *start;
char *end;
int retval = 0;
862
863
BAIL_IF_MACRO(writeDir == NULL, ERR_NO_WRITE_DIR, 0);
864
865
h = writeDir->dirHandle;
866
867
868
869
while (*dirName == '/')
dirName++;
870
871
BAIL_IF_MACRO(h->funcs->mkdir == NULL, ERR_NOT_SUPPORTED, 0);
BAIL_IF_MACRO(!__PHYSFS_verifySecurity(h, dirName), NULL, 0);
872
873
874
875
start = str = malloc(strlen(dirName) + 1);
BAIL_IF_MACRO(str == NULL, ERR_OUT_OF_MEMORY, 0);
strcpy(str, dirName);
876
877
878
879
880
881
while (1)
{
end = strchr(start, '/');
if (end != NULL)
*end = '\0';
882
883
884
885
retval = h->funcs->mkdir(h, str);
if (!retval)
break;
886
887
888
if (end == NULL)
break;
889
890
891
892
*end = '/';
start = end + 1;
} /* while */
893
894
895
896
897
898
899
free(str);
return(retval);
} /* PHYSFS_mkdir */
int PHYSFS_delete(const char *fname)
900
{
901
902
903
904
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);
905
906
907
908
while (*fname == '/')
fname++;
909
910
911
BAIL_IF_MACRO(!__PHYSFS_verifySecurity(h, fname), NULL, 0);
return(h->funcs->remove(h, fname));
} /* PHYSFS_delete */
912
913
914
915
const char *PHYSFS_getRealDir(const char *filename)
{
916
917
DirInfo *i;
918
919
920
while (*filename == '/')
filename++;
921
922
923
924
925
926
927
928
929
930
931
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);
932
933
934
} /* PHYSFS_getRealDir */
935
static int countList(LinkedStringList *list)
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
966
967
{
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 */
968
if (retval != NULL)
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
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);
985
986
987
if (rc > 0) /* insertion point. */
break;
else if (rc == 0) /* already in list. */
988
989
990
991
992
993
994
{
free(item->str);
free(item);
return;
} /* else if */
prev = i;
} /* for */
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)