/*

 * BeOS platform-dependent support routines for PhysicsFS.

 *

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

 *

 *  This file written by Ryan C. Gordon.

 */

#if HAVE_CONFIG_H

#  include <config.h>

#endif

#ifdef __BEOS__

#include <be/kernel/OS.h>

#include <be/app/Roster.h>

#include <be/storage/Volume.h>

#include <be/storage/VolumeRoster.h>

#include <be/storage/Directory.h>

#include <be/storage/Entry.h>

#include <be/storage/Path.h>

#include <be/kernel/fs_info.h>

#include <be/device/scsi.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <errno.h>

#include <assert.h>

#include <unistd.h>

#define __PHYSICSFS_INTERNAL__

#include "physfs_internal.h"

const char *__PHYSFS_platformDirSeparator = "/";

/* !!! FIXME: does strerror() work for non-POSIX api calls? */

#define get_error_str(x) strerror(x)

int __PHYSFS_platformInit(void)

{

    return(1);  /* always succeed. */

} /* __PHYSFS_platformInit */

int __PHYSFS_platformDeinit(void)

{

    return(1);  /* always succeed. */

} /* __PHYSFS_platformDeinit */

/* caller needs to malloc() mntpnt, and expect us to free() it. */

static void addDisc(char *mntpnt, char ***discs, int *disccount)

{

    char **tmp = (char **) realloc(*discs, sizeof (char *) * (*disccount + 1));

    if (tmp)

    {

        tmp[*disccount - 1] = mntpnt;

        *discs = tmp;

        (*disccount)++;

    } /* if */

} /* addDisc */

static char *getMountPoint(const char *devname)

{

    BVolumeRoster mounts;

    BVolume vol;

    mounts.Rewind();

    while (mounts.GetNextVolume(&vol) == B_NO_ERROR)

    {

        fs_info fsinfo;

        fs_stat_dev(vol.Device(), &fsinfo);

        if (strcmp(devname, fsinfo.device_name) == 0)

        {

            //char buf[B_FILE_NAME_LENGTH];

            BDirectory directory;

            BEntry entry;

            BPath path;

            status_t rc;

            rc = vol.GetRootDirectory(&directory);

            BAIL_IF_MACRO(rc < B_OK, get_error_str(rc), NULL);

            rc = directory.GetEntry(&entry);

            BAIL_IF_MACRO(rc < B_OK, get_error_str(rc), NULL);

            rc = entry.GetPath(&path);

            BAIL_IF_MACRO(rc < B_OK, get_error_str(rc), NULL);

            const char *str = path.Path();

            BAIL_IF_MACRO(str == NULL, ERR_OS_ERROR, NULL);  /* ?! */

            char *retval = (char *) malloc(strlen(str) + 1);

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

            strcpy(retval, str);

            return(retval);

        } /* if */

    } /* while */

    return(NULL);

} /* getMountPoint */

    /*

     * This function is lifted from Simple Directmedia Layer (SDL):

     *  http://www.libsdl.org/

     */

static void tryDir(const char *dirname, char ***discs, int *disccount)

{

    BDirectory dir;

    dir.SetTo(dirname);

    if (dir.InitCheck() != B_NO_ERROR)

        return;

    dir.Rewind();

    BEntry entry;

    while (dir.GetNextEntry(&entry) >= 0)

    {

        BPath path;

        const char *name;

        entry_ref e;

        if (entry.GetPath(&path) != B_NO_ERROR)

            continue;

        name = path.Path();

        if (entry.GetRef(&e) != B_NO_ERROR)

            continue;

        if (entry.IsDirectory())

        {

            if (strcmp(e.name, "floppy") != 0)

                tryDir(name, discs, disccount);

        } /* if */

        else

        {

            bool add_it = false;

            int devfd;

            device_geometry g;

            if (strcmp(e.name, "raw") == 0)  /* ignore partitions. */

            {

                int devfd = open(name, O_RDONLY);

                if (devfd >= 0)

                {

                    if (ioctl(devfd, B_GET_GEOMETRY, &g, sizeof(g)) >= 0)

                    {

                        if (g.device_type == B_CD)

                        {

                            char *mntpnt = getMountPoint(name);

                            if (mntpnt != NULL)

                                addDisc(mntpnt, discs, disccount);

                        } /* if */

                    } /* if */

                } /* if */

            } /* if */

            close(devfd);

        } /* else */

    } /* while */

} /* tryDir */

char **__PHYSFS_platformDetectAvailableCDs(void)

{

    char **retval = (char **) malloc(sizeof (char *));

    int cd_count = 1;  /* We count the NULL entry. */

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

    tryDir("/dev/disk", &retval, &cd_count);

    retval[cd_count - 1] = NULL;

    return(retval);

} /* __PHYSFS_platformDetectAvailableCDs */

static team_id getTeamID(void)

{

    thread_info info;

    thread_id tid = find_thread(NULL);

    get_thread_info(tid, &info);

    return(info.team);

} /* getMyTeamID */

char *__PHYSFS_platformCalcBaseDir(const char *argv0)

{

    /* in case there isn't a BApplication yet, we'll construct a roster. */

    BRoster roster; 

    app_info info;

    status_t rc = roster.GetRunningAppInfo(getTeamID(), &info);

    BAIL_IF_MACRO(rc < B_OK, get_error_str(rc), NULL);

    BEntry entry(&(info.ref), true);

    BPath path;

    rc = entry.GetPath(&path);  /* (path) now has binary's path. */

    assert(rc == B_OK);

    rc = path.GetParent(&path); /* chop filename, keep directory. */

    assert(rc == B_OK);

    const char *str = path.Path();

    assert(str != NULL);

    char *retval = (char *) malloc(strlen(str) + 1);

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

    strcpy(retval, str);

    return(retval);

} /* __PHYSFS_platformCalcBaseDir */

PHYSFS_uint64 __PHYSFS_platformGetThreadID(void)

{

    return((PHYSFS_uint64) find_thread(NULL));

} /* __PHYSFS_platformGetThreadID */

/* Much like my college days, try to sleep for 10 milliseconds at a time... */

void __PHYSFS_platformTimeslice(void)

{

    snooze(10000);  /* put thread to sleep for 10 milliseconds. */

} /* __PHYSFS_platformTimeslice */

char *__PHYSFS_platformRealPath(const char *path)

{

    char *str = (char *) alloca(strlen(path) + 1);

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

    strcpy(str, path);

    char *leaf = strrchr(str, '/');

    if (leaf != NULL)

        *(leaf++) = '\0';

    BPath normalized(str, leaf, true);  /* force normalization of path. */

    const char *resolved_path = normalized.Path();

    BAIL_IF_MACRO(resolved_path == NULL, ERR_FILE_NOT_FOUND, NULL);

    char *retval = (char *) malloc(strlen(resolved_path) + 1);

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

    strcpy(retval, resolved_path);

    return(retval);

} /* __PHYSFS_platformRealPath */

void *__PHYSFS_platformCreateMutex(void)

{

    sem_id *retval = (sem_id *) malloc(sizeof (sem_id));

    sem_id rc;

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

    rc = create_sem(1, "PhysicsFS semaphore");

    if (rc < B_OK)

    {

        free(retval);

        BAIL_MACRO(get_error_str(rc), NULL);

    } // if

    *retval = rc;

    return(retval);

} /* __PHYSFS_platformCreateMutex */

void __PHYSFS_platformDestroyMutex(void *mutex)

{

    delete_sem( *((sem_id *) mutex) );

    free(mutex);

} /* __PHYSFS_platformDestroyMutex */

int __PHYSFS_platformGrabMutex(void *mutex)

{

    status_t rc = acquire_sem(*((sem_id *) mutex));

    BAIL_IF_MACRO(rc < B_OK, get_error_str(rc), 0);

    return(1);

} /* __PHYSFS_platformGrabMutex */

void __PHYSFS_platformReleaseMutex(void *mutex)

{

    release_sem(*((sem_id *) mutex));

} /* __PHYSFS_platformReleaseMutex */

#endif

/* end of beos.cpp ... */