archivers/dir.c
author Ryan C. Gordon <icculus@icculus.org>
Sun, 26 Sep 2004 13:00:59 +0000
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parent 648 5c993684b8f2
child 657 dad3b5c307a9
permissions -rw-r--r--
Did the same thing to FileHandles than I did to DirHandles, but this triggered massive tweaking in physfs.c. A lot of code got little cleanups, which was nice. Less malloc pressure, too, since opening a file used to allocate a ton of crap and mush it together...now it's basically down to one structure and the instance data in whatever archiver.
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/*
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 * Standard directory I/O support routines for PhysicsFS.
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 *
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 * Please see the file LICENSE in the source's root directory.
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 *
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 *  This file written by Ryan C. Gordon.
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 */
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#if HAVE_CONFIG_H
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#  include <config.h>
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "physfs.h"
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#define __PHYSICSFS_INTERNAL__
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#include "physfs_internal.h"
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static PHYSFS_sint64 DIR_read(fvoid *opaque, void *buffer,
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                              PHYSFS_uint32 objSize, PHYSFS_uint32 objCount);
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static PHYSFS_sint64 DIR_write(fvoid *opaque, const void *buffer,
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                               PHYSFS_uint32 objSize, PHYSFS_uint32 objCount);
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static int DIR_eof(fvoid *opaque);
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static PHYSFS_sint64 DIR_tell(fvoid *opaque);
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static int DIR_seek(fvoid *opaque, PHYSFS_uint64 offset);
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static PHYSFS_sint64 DIR_fileLength(fvoid *opaque);
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static int DIR_fileClose(fvoid *opaque);
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static int DIR_isArchive(const char *filename, int forWriting);
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static void *DIR_openArchive(const char *name, int forWriting);
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static LinkedStringList *DIR_enumerateFiles(dvoid *opaque,
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                                            const char *dname,
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                                            int omitSymLinks);
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static int DIR_exists(dvoid *opaque, const char *name);
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static int DIR_isDirectory(dvoid *opaque, const char *name, int *fileExists);
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static int DIR_isSymLink(dvoid *opaque, const char *name, int *fileExists);
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static fvoid *DIR_openRead(dvoid *opaque, const char *fnm, int *exist);
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static PHYSFS_sint64 DIR_getLastModTime(dvoid *opaque, const char *f, int *e);
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static fvoid *DIR_openWrite(dvoid *opaque, const char *filename);
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static fvoid *DIR_openAppend(dvoid *opaque, const char *filename);
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static int DIR_remove(dvoid *opaque, const char *name);
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static int DIR_mkdir(dvoid *opaque, const char *name);
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static void DIR_dirClose(dvoid *opaque);
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const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_DIR =
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{
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    "",
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    DIR_ARCHIVE_DESCRIPTION,
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    "Ryan C. Gordon <icculus@clutteredmind.org>",
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    "http://icculus.org/physfs/",
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};
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const PHYSFS_Archiver __PHYSFS_Archiver_DIR =
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{
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    &__PHYSFS_ArchiveInfo_DIR,
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    DIR_isArchive,          /* isArchive() method      */
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    DIR_openArchive,        /* openArchive() method    */
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    DIR_enumerateFiles,     /* enumerateFiles() method */
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    DIR_exists,             /* exists() method         */
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    DIR_isDirectory,        /* isDirectory() method    */
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    DIR_isSymLink,          /* isSymLink() method      */
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    DIR_getLastModTime,     /* getLastModTime() method */
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    DIR_openRead,           /* openRead() method       */
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    DIR_openWrite,          /* openWrite() method      */
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    DIR_openAppend,         /* openAppend() method     */
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    DIR_remove,             /* remove() method         */
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    DIR_mkdir,              /* mkdir() method          */
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    DIR_dirClose,           /* dirClose() method       */
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    DIR_read,               /* read() method           */
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    DIR_write,              /* write() method          */
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    DIR_eof,                /* eof() method            */
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    DIR_tell,               /* tell() method           */
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    DIR_seek,               /* seek() method           */
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    DIR_fileLength,         /* fileLength() method     */
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    DIR_fileClose           /* fileClose() method      */
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};
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static PHYSFS_sint64 DIR_read(fvoid *opaque, void *buffer,
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                              PHYSFS_uint32 objSize, PHYSFS_uint32 objCount)
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{
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    PHYSFS_sint64 retval;
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    retval = __PHYSFS_platformRead(opaque, buffer, objSize, objCount);
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    return(retval);
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} /* DIR_read */
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static PHYSFS_sint64 DIR_write(fvoid *opaque, const void *buffer,
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                               PHYSFS_uint32 objSize, PHYSFS_uint32 objCount)
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{
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    PHYSFS_sint64 retval;
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    retval = __PHYSFS_platformWrite(opaque, buffer, objSize, objCount);
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    return(retval);
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} /* DIR_write */
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static int DIR_eof(fvoid *opaque)
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    return(__PHYSFS_platformEOF(opaque));
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} /* DIR_eof */
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static PHYSFS_sint64 DIR_tell(fvoid *opaque)
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    return(__PHYSFS_platformTell(opaque));
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} /* DIR_tell */
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static int DIR_seek(fvoid *opaque, PHYSFS_uint64 offset)
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{
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    return(__PHYSFS_platformSeek(opaque, offset));
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} /* DIR_seek */
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static PHYSFS_sint64 DIR_fileLength(fvoid *opaque)
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{
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    return(__PHYSFS_platformFileLength(opaque));
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} /* DIR_fileLength */
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static int DIR_fileClose(fvoid *opaque)
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{
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    /*
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     * we manually flush the buffer, since that's the place a close will
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     *  most likely fail, but that will leave the file handle in an undefined
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     *  state if it fails. Flush failures we can recover from.
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     */
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    BAIL_IF_MACRO(!__PHYSFS_platformFlush(opaque), NULL, 0);
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    BAIL_IF_MACRO(!__PHYSFS_platformClose(opaque), NULL, 0);
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    return(1);
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} /* DIR_fileClose */
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static int DIR_isArchive(const char *filename, int forWriting)
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{
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    /* directories ARE archives in this driver... */
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    return(__PHYSFS_platformIsDirectory(filename));
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} /* DIR_isArchive */
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static void *DIR_openArchive(const char *name, int forWriting)
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{
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    const char *dirsep = PHYSFS_getDirSeparator();
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    char *retval = NULL;
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    size_t namelen = strlen(name);
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    size_t seplen = strlen(dirsep);
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    /* !!! FIXME: when is this not called right before openArchive? */
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    BAIL_IF_MACRO(!DIR_isArchive(name, forWriting),
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                    ERR_UNSUPPORTED_ARCHIVE, 0);
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    retval = malloc(namelen + seplen + 1);
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    BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
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        /* make sure there's a dir separator at the end of the string */
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    strcpy(retval, name);
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    if (strcmp((name + namelen) - seplen, dirsep) != 0)
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        strcat(retval, dirsep);
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   163
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    return(retval);
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} /* DIR_openArchive */
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static LinkedStringList *DIR_enumerateFiles(dvoid *opaque,
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                                            const char *dname,
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                                            int omitSymLinks)
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{
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    char *d = __PHYSFS_platformCvtToDependent((char *)opaque, dname, NULL);
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    LinkedStringList *retval;
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    BAIL_IF_MACRO(d == NULL, NULL, NULL);
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    retval = __PHYSFS_platformEnumerateFiles(d, omitSymLinks);
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    free(d);
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    return(retval);
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} /* DIR_enumerateFiles */
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static int DIR_exists(dvoid *opaque, const char *name)
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{
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    char *f = __PHYSFS_platformCvtToDependent((char *) opaque, name, NULL);
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    int retval;
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    BAIL_IF_MACRO(f == NULL, NULL, 0);
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    retval = __PHYSFS_platformExists(f);
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    free(f);
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    return(retval);
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} /* DIR_exists */
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static int DIR_isDirectory(dvoid *opaque, const char *name, int *fileExists)
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{
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    char *d = __PHYSFS_platformCvtToDependent((char *) opaque, name, NULL);
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    int retval = 0;
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    BAIL_IF_MACRO(d == NULL, NULL, 0);
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    *fileExists = __PHYSFS_platformExists(d);
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    if (*fileExists)
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        retval = __PHYSFS_platformIsDirectory(d);
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    free(d);
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    return(retval);
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} /* DIR_isDirectory */
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static int DIR_isSymLink(dvoid *opaque, const char *name, int *fileExists)
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{
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    char *f = __PHYSFS_platformCvtToDependent((char *) opaque, name, NULL);
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    int retval = 0;
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225
393c0923c1b3 FIXME removal.
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    BAIL_IF_MACRO(f == NULL, NULL, 0);
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    *fileExists = __PHYSFS_platformExists(f);
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    if (*fileExists)
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        retval = __PHYSFS_platformIsSymLink(f);
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    free(f);
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    return(retval);
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} /* DIR_isSymLink */
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static PHYSFS_sint64 DIR_getLastModTime(dvoid *opaque,
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                                        const char *name,
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                                        int *fileExists)
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{
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    char *d = __PHYSFS_platformCvtToDependent((char *) opaque, name, NULL);
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    PHYSFS_sint64 retval = -1;
240
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    BAIL_IF_MACRO(d == NULL, NULL, 0);
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    *fileExists = __PHYSFS_platformExists(d);
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    if (*fileExists)
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        retval = __PHYSFS_platformGetLastModTime(d);
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    free(d);
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    return(retval);
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} /* DIR_getLastModTime */
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052041af9001 Added PHYSFS_getLastModTime() API. (Thanks, John Hall!)
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static fvoid *doOpen(dvoid *opaque, const char *name,
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                     void *(*openFunc)(const char *filename),
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                     int *fileExists)
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{
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    char *f = __PHYSFS_platformCvtToDependent((char *) opaque, name, NULL);
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    void *rc = NULL;
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    BAIL_IF_MACRO(f == NULL, NULL, NULL);
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467
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    if (fileExists != NULL)
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    {
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        *fileExists = __PHYSFS_platformExists(f);
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        if (!(*fileExists))
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        {
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            free(f);
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            return(NULL);
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        } /* if */
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    } /* if */
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    rc = openFunc(f);
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    free(f);
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    return((fvoid *) rc);
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} /* doOpen */
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static fvoid *DIR_openRead(dvoid *opaque, const char *fnm, int *exist)
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{
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    return(doOpen(opaque, fnm, __PHYSFS_platformOpenRead, exist));
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} /* DIR_openRead */
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static fvoid *DIR_openWrite(dvoid *opaque, const char *filename)
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{
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    return(doOpen(opaque, filename, __PHYSFS_platformOpenWrite, NULL));
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} /* DIR_openWrite */
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static fvoid *DIR_openAppend(dvoid *opaque, const char *filename)
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{
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    return(doOpen(opaque, filename, __PHYSFS_platformOpenAppend, NULL));
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} /* DIR_openAppend */
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static int DIR_remove(dvoid *opaque, const char *name)
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{
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    char *f = __PHYSFS_platformCvtToDependent((char *) opaque, name, NULL);
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    int retval;
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    BAIL_IF_MACRO(f == NULL, NULL, 0);
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    retval = __PHYSFS_platformDelete(f);
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    free(f);
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    return(retval);
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} /* DIR_remove */
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static int DIR_mkdir(dvoid *opaque, const char *name)
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{
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    char *f = __PHYSFS_platformCvtToDependent((char *) opaque, name, NULL);
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    int retval;
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    BAIL_IF_MACRO(f == NULL, NULL, 0);
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    retval = __PHYSFS_platformMkDir(f);
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    free(f);
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    return(retval);
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} /* DIR_mkdir */
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static void DIR_dirClose(dvoid *opaque)
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{
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    free(opaque);
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} /* DIR_dirClose */
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/* end of dir.c ... */
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