/*

 * Standard directory I/O support routines for PhysicsFS.

 *

 * Please see the file LICENSE.txt in the source's root directory.

 *

 *  This file written by Ryan C. Gordon.

 */

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include "physfs.h"

#define __PHYSICSFS_INTERNAL__

#include "physfs_internal.h"

static PHYSFS_sint64 DIR_read(fvoid *opaque, void *buffer,

                              PHYSFS_uint32 objSize, PHYSFS_uint32 objCount)

{

    PHYSFS_sint64 retval;

    retval = __PHYSFS_platformRead(opaque, buffer, objSize, objCount);

    return retval;

} /* DIR_read */

static PHYSFS_sint64 DIR_write(fvoid *opaque, const void *buffer,

                               PHYSFS_uint32 objSize, PHYSFS_uint32 objCount)

{

    PHYSFS_sint64 retval;

    retval = __PHYSFS_platformWrite(opaque, buffer, objSize, objCount);

    return retval;

} /* DIR_write */

static int DIR_eof(fvoid *opaque)

{

    return __PHYSFS_platformEOF(opaque);

} /* DIR_eof */

static PHYSFS_sint64 DIR_tell(fvoid *opaque)

{

    return __PHYSFS_platformTell(opaque);

} /* DIR_tell */

static int DIR_seek(fvoid *opaque, PHYSFS_uint64 offset)

{

    return __PHYSFS_platformSeek(opaque, offset);

} /* DIR_seek */

static PHYSFS_sint64 DIR_fileLength(fvoid *opaque)

{

    return __PHYSFS_platformFileLength(opaque);

} /* DIR_fileLength */

static int DIR_fileClose(fvoid *opaque)

{

    /*

     * we manually flush the buffer, since that's the place a close will

     *  most likely fail, but that will leave the file handle in an undefined

     *  state if it fails. Flush failures we can recover from.

     */

    BAIL_IF_MACRO(!__PHYSFS_platformFlush(opaque), NULL, 0);

    BAIL_IF_MACRO(!__PHYSFS_platformClose(opaque), NULL, 0);

    return 1;

} /* DIR_fileClose */

static int DIR_isArchive(const char *filename, int forWriting)

{

    /* directories ARE archives in this driver... */

    return __PHYSFS_platformIsDirectory(filename);

} /* DIR_isArchive */

static void *DIR_openArchive(const char *name, int forWriting)

{

    const char *dirsep = PHYSFS_getDirSeparator();

    char *retval = NULL;

    size_t namelen = strlen(name);

    size_t seplen = strlen(dirsep);

    /* !!! FIXME: when is this not called right before openArchive? */

    BAIL_IF_MACRO(!DIR_isArchive(name, forWriting),

                    ERR_UNSUPPORTED_ARCHIVE, 0);

    retval = allocator.Malloc(namelen + seplen + 1);

    BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);

        /* make sure there's a dir separator at the end of the string */

    strcpy(retval, name);

    if (strcmp((name + namelen) - seplen, dirsep) != 0)

        strcat(retval, dirsep);

    return retval;

} /* DIR_openArchive */

static void DIR_enumerateFiles(dvoid *opaque, const char *dname,

                               int omitSymLinks, PHYSFS_EnumFilesCallback cb,

                               const char *origdir, void *callbackdata)

{

    char *d = __PHYSFS_platformCvtToDependent((char *)opaque, dname, NULL);

    if (d != NULL)

    {

        __PHYSFS_platformEnumerateFiles(d, omitSymLinks, cb,

                                        origdir, callbackdata);

        allocator.Free(d);

    } /* if */

} /* DIR_enumerateFiles */

static int DIR_exists(dvoid *opaque, const char *name)

{

    char *f = __PHYSFS_platformCvtToDependent((char *) opaque, name, NULL);

    int retval;

    BAIL_IF_MACRO(f == NULL, NULL, 0);

    retval = __PHYSFS_platformExists(f);

    allocator.Free(f);

    return retval;

} /* DIR_exists */

static int DIR_isDirectory(dvoid *opaque, const char *name, int *fileExists)

{

    char *d = __PHYSFS_platformCvtToDependent((char *) opaque, name, NULL);

    int retval = 0;

    BAIL_IF_MACRO(d == NULL, NULL, 0);

    *fileExists = __PHYSFS_platformExists(d);

    if (*fileExists)

        retval = __PHYSFS_platformIsDirectory(d);

    allocator.Free(d);

    return retval;

} /* DIR_isDirectory */

static int DIR_isSymLink(dvoid *opaque, const char *name, int *fileExists)

{

    char *f = __PHYSFS_platformCvtToDependent((char *) opaque, name, NULL);

    int retval = 0;

    BAIL_IF_MACRO(f == NULL, NULL, 0);

    *fileExists = __PHYSFS_platformExists(f);

    if (*fileExists)

        retval = __PHYSFS_platformIsSymLink(f);

    allocator.Free(f);

    return retval;

} /* DIR_isSymLink */

static PHYSFS_sint64 DIR_getLastModTime(dvoid *opaque,

                                        const char *name,

                                        int *fileExists)

{

    char *d = __PHYSFS_platformCvtToDependent((char *) opaque, name, NULL);

    PHYSFS_sint64 retval = -1;

    BAIL_IF_MACRO(d == NULL, NULL, 0);

    *fileExists = __PHYSFS_platformExists(d);

    if (*fileExists)

        retval = __PHYSFS_platformGetLastModTime(d);

    allocator.Free(d);

    return retval;

} /* DIR_getLastModTime */

static fvoid *doOpen(dvoid *opaque, const char *name,

                     void *(*openFunc)(const char *filename),

                     int *fileExists)

{

    char *f = __PHYSFS_platformCvtToDependent((char *) opaque, name, NULL);

    void *rc = NULL;

    BAIL_IF_MACRO(f == NULL, NULL, NULL);

    if (fileExists != NULL)

    {

        *fileExists = __PHYSFS_platformExists(f);

        if (!(*fileExists))

        {

            allocator.Free(f);

            return NULL;

        } /* if */

    } /* if */

    rc = openFunc(f);

    allocator.Free(f);

    return ((fvoid *) rc);

} /* doOpen */

static fvoid *DIR_openRead(dvoid *opaque, const char *fnm, int *exist)

{

    return doOpen(opaque, fnm, __PHYSFS_platformOpenRead, exist);

} /* DIR_openRead */

static fvoid *DIR_openWrite(dvoid *opaque, const char *filename)

{

    return doOpen(opaque, filename, __PHYSFS_platformOpenWrite, NULL);

} /* DIR_openWrite */

static fvoid *DIR_openAppend(dvoid *opaque, const char *filename)

{

    return doOpen(opaque, filename, __PHYSFS_platformOpenAppend, NULL);

} /* DIR_openAppend */

static int DIR_remove(dvoid *opaque, const char *name)

{

    char *f = __PHYSFS_platformCvtToDependent((char *) opaque, name, NULL);

    int retval;

    BAIL_IF_MACRO(f == NULL, NULL, 0);

    retval = __PHYSFS_platformDelete(f);

    allocator.Free(f);

    return retval;

} /* DIR_remove */

static int DIR_mkdir(dvoid *opaque, const char *name)

{

    char *f = __PHYSFS_platformCvtToDependent((char *) opaque, name, NULL);

    int retval;

    BAIL_IF_MACRO(f == NULL, NULL, 0);

    retval = __PHYSFS_platformMkDir(f);

    allocator.Free(f);

    return retval;

} /* DIR_mkdir */

static void DIR_dirClose(dvoid *opaque)

{

    allocator.Free(opaque);

} /* DIR_dirClose */

const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_DIR =

{

    "",

    DIR_ARCHIVE_DESCRIPTION,

    "Ryan C. Gordon <icculus@icculus.org>",

    "http://icculus.org/physfs/",

};

const PHYSFS_Archiver __PHYSFS_Archiver_DIR =

{

    &__PHYSFS_ArchiveInfo_DIR,

    DIR_isArchive,          /* isArchive() method      */

    DIR_openArchive,        /* openArchive() method    */

    DIR_enumerateFiles,     /* enumerateFiles() method */

    DIR_exists,             /* exists() method         */

    DIR_isDirectory,        /* isDirectory() method    */

    DIR_isSymLink,          /* isSymLink() method      */

    DIR_getLastModTime,     /* getLastModTime() method */

    DIR_openRead,           /* openRead() method       */

    DIR_openWrite,          /* openWrite() method      */

    DIR_openAppend,         /* openAppend() method     */

    DIR_remove,             /* remove() method         */

    DIR_mkdir,              /* mkdir() method          */

    DIR_dirClose,           /* dirClose() method       */

    DIR_read,               /* read() method           */

    DIR_write,              /* write() method          */

    DIR_eof,                /* eof() method            */

    DIR_tell,               /* tell() method           */

    DIR_seek,               /* seek() method           */

    DIR_fileLength,         /* fileLength() method     */

};

/* end of dir.c ... */