misc/libphysfs/platform_beos.cpp
author Janne Uusitupa
Sun, 02 Jul 2017 11:31:00 -0400
changeset 12437 e5246ffdbdaa
parent 12218 bb5522e88ab2
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/*
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 * BeOS platform-dependent support routines for PhysicsFS.
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 *
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 * Please see the file LICENSE.txt 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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#define __PHYSICSFS_INTERNAL__
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#include "physfs_platforms.h"
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#ifdef PHYSFS_PLATFORM_BEOS
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#ifdef PHYSFS_PLATFORM_HAIKU
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#include <os/kernel/OS.h>
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#include <os/app/Roster.h>
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#include <os/storage/Volume.h>
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#include <os/storage/VolumeRoster.h>
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#include <os/storage/Directory.h>
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#include <os/storage/Entry.h>
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#include <os/storage/Path.h>
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#include <os/kernel/fs_info.h>
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#include <os/device/scsi.h>
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#include <os/support/Locker.h>
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#else
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#include <be/kernel/OS.h>
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#include <be/app/Roster.h>
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#include <be/storage/Volume.h>
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#include <be/storage/VolumeRoster.h>
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#include <be/storage/Directory.h>
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#include <be/storage/Entry.h>
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#include <be/storage/Path.h>
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#include <be/kernel/fs_info.h>
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#include <be/device/scsi.h>
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#include <be/support/Locker.h>
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#endif
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#include <errno.h>
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#include <unistd.h>
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#include "physfs_internal.h"
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int __PHYSFS_platformInit(void)
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{
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    return 1;  /* always succeed. */
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} /* __PHYSFS_platformInit */
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int __PHYSFS_platformDeinit(void)
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{
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    return 1;  /* always succeed. */
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} /* __PHYSFS_platformDeinit */
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static char *getMountPoint(const char *devname, char *buf, size_t bufsize)
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{
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    BVolumeRoster mounts;
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    BVolume vol;
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    mounts.Rewind();
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    while (mounts.GetNextVolume(&vol) == B_NO_ERROR)
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    {
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        fs_info fsinfo;
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        fs_stat_dev(vol.Device(), &fsinfo);
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        if (strcmp(devname, fsinfo.device_name) == 0)
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        {
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            BDirectory directory;
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            BEntry entry;
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            BPath path;
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            const char *str;
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            if ( (vol.GetRootDirectory(&directory) < B_OK) ||
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                 (directory.GetEntry(&entry) < B_OK) ||
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                 (entry.GetPath(&path) < B_OK) ||
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                 ( (str = path.Path()) == NULL) )
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                return NULL;
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            strncpy(buf, str, bufsize-1);
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            buf[bufsize-1] = '\0';
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            return buf;
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        } /* if */
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    } /* while */
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    return NULL;
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} /* getMountPoint */
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    /*
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     * This function is lifted from Simple Directmedia Layer (SDL):
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bb5522e88ab2 bulk copy of latest physfs to our misc/libphysfs since this seems to fix an off-by-1 error reliably hit in readln read of 1 byte probably introduced in the addition of the buffered read. Whether this is excessive or whether libphysfs should even be maintained by us is another matter. But at least we shouldn't crash
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     *  https://www.libsdl.org/  ... this is zlib-licensed code, too.
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     */
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static void tryDir(const char *d, PHYSFS_StringCallback callback, void *data)
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{
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    BDirectory dir;
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    dir.SetTo(d);
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    if (dir.InitCheck() != B_NO_ERROR)
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        return;
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    dir.Rewind();
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    BEntry entry;
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    while (dir.GetNextEntry(&entry) >= 0)
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    {
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        BPath path;
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        const char *name;
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        entry_ref e;
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        if (entry.GetPath(&path) != B_NO_ERROR)
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            continue;
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        name = path.Path();
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        if (entry.GetRef(&e) != B_NO_ERROR)
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            continue;
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        if (entry.IsDirectory())
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        {
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            if (strcmp(e.name, "floppy") != 0)
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                tryDir(name, callback, data);
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            continue;
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        } /* if */
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        if (strcmp(e.name, "raw") != 0)  /* ignore partitions. */
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            continue;
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        const int devfd = open(name, O_RDONLY);
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        if (devfd < 0)
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            continue;
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        device_geometry g;
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        const int rc = ioctl(devfd, B_GET_GEOMETRY, &g, sizeof (g));
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        close(devfd);
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        if (rc < 0)
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            continue;
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        if (g.device_type != B_CD)
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            continue;
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        char mntpnt[B_FILE_NAME_LENGTH];
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        if (getMountPoint(name, mntpnt, sizeof (mntpnt)))
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            callback(data, mntpnt);
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    } /* while */
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} /* tryDir */
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void __PHYSFS_platformDetectAvailableCDs(PHYSFS_StringCallback cb, void *data)
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{
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    tryDir("/dev/disk", cb, data);
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} /* __PHYSFS_platformDetectAvailableCDs */
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static team_id getTeamID(void)
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{
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    thread_info info;
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    thread_id tid = find_thread(NULL);
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    get_thread_info(tid, &info);
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    return info.team;
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} /* getTeamID */
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char *__PHYSFS_platformCalcBaseDir(const char *argv0)
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{
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    image_info info;
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    int32 cookie = 0;
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    while (get_next_image_info(0, &cookie, &info) == B_OK)
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    {
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        if (info.type == B_APP_IMAGE)
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            break;
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    } /* while */
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    BEntry entry(info.name, true);
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    BPath path;
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    status_t rc = entry.GetPath(&path);  /* (path) now has binary's path. */
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    assert(rc == B_OK);
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    rc = path.GetParent(&path); /* chop filename, keep directory. */
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    assert(rc == B_OK);
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    const char *str = path.Path();
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    assert(str != NULL);
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    const size_t len = strlen(str);
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    char *retval = (char *) allocator.Malloc(len + 2);
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    BAIL_IF_MACRO(!retval, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
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    strcpy(retval, str);
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    retval[len] = '/';
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    retval[len+1] = '\0';
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    return retval;
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} /* __PHYSFS_platformCalcBaseDir */
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char *__PHYSFS_platformCalcPrefDir(const char *org, const char *app)
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{
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    const char *userdir = __PHYSFS_getUserDir();
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    const char *append = "config/settings/";
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    const size_t len = strlen(userdir) + strlen(append) + strlen(app) + 2;
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    char *retval = allocator.Malloc(len);
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    BAIL_IF_MACRO(!retval, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
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    snprintf(retval, len, "%s%s%s/", userdir, append, app);
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    return retval;
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} /* __PHYSFS_platformCalcPrefDir */
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void *__PHYSFS_platformGetThreadID(void)
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{
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    return (void *) find_thread(NULL);
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} /* __PHYSFS_platformGetThreadID */
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void *__PHYSFS_platformCreateMutex(void)
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{
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    return new BLocker("PhysicsFS lock", true);
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} /* __PHYSFS_platformCreateMutex */
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void __PHYSFS_platformDestroyMutex(void *mutex)
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{
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    delete ((BLocker *) mutex);
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} /* __PHYSFS_platformDestroyMutex */
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int __PHYSFS_platformGrabMutex(void *mutex)
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{
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    return ((BLocker *) mutex)->Lock() ? 1 : 0;
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} /* __PHYSFS_platformGrabMutex */
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void __PHYSFS_platformReleaseMutex(void *mutex)
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{
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    ((BLocker *) mutex)->Unlock();
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} /* __PHYSFS_platformReleaseMutex */
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int __PHYSFS_platformSetDefaultAllocator(PHYSFS_Allocator *a)
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{
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    return 0;  /* just use malloc() and friends. */
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} /* __PHYSFS_platformSetDefaultAllocator */
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#endif  /* PHYSFS_PLATFORM_BEOS */
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/* end of beos.cpp ... */
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