/*

 * 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.

 */

#define __PHYSICSFS_INTERNAL__

#include "physfs_internal.h"

/* There's no PHYSFS_Io interface here. Use __PHYSFS_createNativeIo(). */

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

{

    PHYSFS_Stat statbuf;

    const char *dirsep = PHYSFS_getDirSeparator();

    char *retval = NULL;

    const size_t namelen = strlen(name);

    const size_t seplen = strlen(dirsep);

    int exists = 0;

    assert(io == NULL);  /* shouldn't create an Io for these. */

    BAIL_IF_MACRO(!__PHYSFS_platformStat(name, &exists, &statbuf), NULL, NULL);

    if ((!exists) || (statbuf.filetype != PHYSFS_FILETYPE_DIRECTORY))

        BAIL_MACRO(ERR_NOT_AN_ARCHIVE, NULL);

    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 */

    /* !!! FIXME: is there really any place where (seplen != 1)? */

    strcpy(retval, name);

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

        strcat(retval, dirsep);

    return retval;

} /* DIR_openArchive */

/* !!! FIXME: I would like to smallAlloc() all these conversions somehow. */

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 PHYSFS_Io *doOpen(dvoid *opaque, const char *name,

                         const int mode, int *fileExists)

{

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

    PHYSFS_Io *io = NULL;

    int existtmp = 0;

    if (fileExists == NULL)

        fileExists = &existtmp;

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

    io = __PHYSFS_createNativeIo(f, mode);

    if (io == NULL)

    {

        PHYSFS_Stat statbuf;  /* !!! FIXME: this changes the error message. */

        __PHYSFS_platformStat(f, fileExists, &statbuf);

    } /* if */

    return io;

} /* doOpen */

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

{

    return doOpen(opaque, fnm, 'r', exist);

} /* DIR_openRead */

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

{

    return doOpen(opaque, filename, 'w', NULL);

} /* DIR_openWrite */

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

{

    return doOpen(opaque, filename, 'a', 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 */

static int DIR_stat(dvoid *opaque, const char *name, int *exists,

                    PHYSFS_Stat *stat)

{

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

    int retval = 0;

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

    retval = __PHYSFS_platformStat(d, exists, stat);

    allocator.Free(d);

    return retval;

} /* DIR_stat */

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_openArchive,        /* openArchive() method    */

    DIR_enumerateFiles,     /* enumerateFiles() 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_stat                /* stat() method           */

};

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