misc/libphysfs/platform_macosx.c
author nemo
Mon, 10 Apr 2017 12:06:43 -0400
changeset 12213 bb5522e88ab2
parent 10017 de822cd3df3a
permissions -rw-r--r--
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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/*
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 * Mac OS X 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_MACOSX
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#include <CoreFoundation/CoreFoundation.h>
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#if !defined(PHYSFS_NO_CDROM_SUPPORT)
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#include <Carbon/Carbon.h>  /* !!! FIXME */
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#include <IOKit/storage/IOMedia.h>
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#include <IOKit/storage/IOCDMedia.h>
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#include <IOKit/storage/IODVDMedia.h>
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#include <sys/mount.h>
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#endif
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/* Seems to get defined in some system header... */
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#ifdef Free
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#undef Free
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#endif
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#include "physfs_internal.h"
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/* Wrap PHYSFS_Allocator in a CFAllocator... */
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static CFAllocatorRef cfallocator = NULL;
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static CFStringRef cfallocCopyDesc(const void *info)
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{
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    return CFStringCreateWithCString(cfallocator, "PhysicsFS",
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                                     kCFStringEncodingASCII);
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} /* cfallocCopyDesc */
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static void *cfallocMalloc(CFIndex allocSize, CFOptionFlags hint, void *info)
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{
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    return allocator.Malloc(allocSize);
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} /* cfallocMalloc */
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static void cfallocFree(void *ptr, void *info)
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{
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    allocator.Free(ptr);
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} /* cfallocFree */
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static void *cfallocRealloc(void *ptr, CFIndex newsize,
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                            CFOptionFlags hint, void *info)
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{
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    if ((ptr == NULL) || (newsize <= 0))
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        return NULL;  /* ADC docs say you should always return NULL here. */
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    return allocator.Realloc(ptr, newsize);
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} /* cfallocRealloc */
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int __PHYSFS_platformInit(void)
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{
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    /* set up a CFAllocator, so Carbon can use the physfs allocator, too. */
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    CFAllocatorContext ctx;
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    memset(&ctx, '\0', sizeof (ctx));
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    ctx.copyDescription = cfallocCopyDesc;
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    ctx.allocate = cfallocMalloc;
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    ctx.reallocate = cfallocRealloc;
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    ctx.deallocate = cfallocFree;
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    cfallocator = CFAllocatorCreate(kCFAllocatorUseContext, &ctx);
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    BAIL_IF_MACRO(!cfallocator, PHYSFS_ERR_OUT_OF_MEMORY, 0);
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    return 1;  /* success. */
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} /* __PHYSFS_platformInit */
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int __PHYSFS_platformDeinit(void)
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{
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    CFRelease(cfallocator);
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    cfallocator = NULL;
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    return 1;  /* always succeed. */
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} /* __PHYSFS_platformDeinit */
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/* CD-ROM detection code... */
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/*
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 * Code based on sample from Apple Developer Connection:
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 *  https://developer.apple.com/samplecode/Sample_Code/Devices_and_Hardware/Disks/VolumeToBSDNode/VolumeToBSDNode.c.htm
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 */
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#if !defined(PHYSFS_NO_CDROM_SUPPORT)
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static int darwinIsWholeMedia(io_service_t service)
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{
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    int retval = 0;
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    CFTypeRef wholeMedia;
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    if (!IOObjectConformsTo(service, kIOMediaClass))
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        return 0;
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    wholeMedia = IORegistryEntryCreateCFProperty(service,
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                                                 CFSTR(kIOMediaWholeKey),
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                                                 cfallocator, 0);
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    if (wholeMedia == NULL)
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        return 0;
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    retval = CFBooleanGetValue(wholeMedia);
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    CFRelease(wholeMedia);
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    return retval;
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} /* darwinIsWholeMedia */
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static int darwinIsMountedDisc(char *bsdName, mach_port_t masterPort)
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{
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    int retval = 0;
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    CFMutableDictionaryRef matchingDict;
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    kern_return_t rc;
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    io_iterator_t iter;
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    io_service_t service;
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    if ((matchingDict = IOBSDNameMatching(masterPort, 0, bsdName)) == NULL)
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        return 0;
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    rc = IOServiceGetMatchingServices(masterPort, matchingDict, &iter);
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    if ((rc != KERN_SUCCESS) || (!iter))
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        return 0;
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    service = IOIteratorNext(iter);
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    IOObjectRelease(iter);
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    if (!service)
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        return 0;
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    rc = IORegistryEntryCreateIterator(service, kIOServicePlane,
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             kIORegistryIterateRecursively | kIORegistryIterateParents, &iter);
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    if (!iter)
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        return 0;
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    if (rc != KERN_SUCCESS)
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    {
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        IOObjectRelease(iter);
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        return 0;
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    } /* if */
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    IOObjectRetain(service);  /* add an extra object reference... */
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    do
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    {
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        if (darwinIsWholeMedia(service))
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        {
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            if ( (IOObjectConformsTo(service, kIOCDMediaClass)) ||
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                 (IOObjectConformsTo(service, kIODVDMediaClass)) )
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            {
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                retval = 1;
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            } /* if */
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        } /* if */
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        IOObjectRelease(service);
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    } while ((service = IOIteratorNext(iter)) && (!retval));
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    IOObjectRelease(iter);
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    IOObjectRelease(service);
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    return retval;
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} /* darwinIsMountedDisc */
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#endif /* !defined(PHYSFS_NO_CDROM_SUPPORT) */
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void __PHYSFS_platformDetectAvailableCDs(PHYSFS_StringCallback cb, void *data)
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{
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#if !defined(PHYSFS_NO_CDROM_SUPPORT)
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    const char *devPrefix = "/dev/";
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    const int prefixLen = strlen(devPrefix);
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    mach_port_t masterPort = 0;
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    struct statfs *mntbufp;
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    int i, mounts;
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    if (IOMasterPort(MACH_PORT_NULL, &masterPort) != KERN_SUCCESS)
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        BAIL_MACRO(PHYSFS_ERR_OS_ERROR, ) /*return void*/;
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    mounts = getmntinfo(&mntbufp, MNT_WAIT);  /* NOT THREAD SAFE! */
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    for (i = 0; i < mounts; i++)
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    {
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        char *dev = mntbufp[i].f_mntfromname;
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        char *mnt = mntbufp[i].f_mntonname;
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        if (strncmp(dev, devPrefix, prefixLen) != 0)  /* a virtual device? */
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            continue;
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        dev += prefixLen;
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   194
        if (darwinIsMountedDisc(dev, masterPort))
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            cb(data, mnt);
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    } /* for */
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#endif /* !defined(PHYSFS_NO_CDROM_SUPPORT) */
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} /* __PHYSFS_platformDetectAvailableCDs */
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static char *convertCFString(CFStringRef cfstr)
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{
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    CFIndex len = CFStringGetMaximumSizeForEncoding(CFStringGetLength(cfstr),
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                                                    kCFStringEncodingUTF8) + 1;
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    char *retval = (char *) allocator.Malloc(len);
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    BAIL_IF_MACRO(!retval, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
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   207
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   208
    if (CFStringGetCString(cfstr, retval, len, kCFStringEncodingUTF8))
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    {
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        /* shrink overallocated buffer if possible... */
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        CFIndex newlen = strlen(retval) + 1;
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   212
        if (newlen < len)
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   213
        {
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   214
            void *ptr = allocator.Realloc(retval, newlen);
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   215
            if (ptr != NULL)
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                retval = (char *) ptr;
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   217
        } /* if */
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   218
    } /* if */
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   219
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    else  /* probably shouldn't fail, but just in case... */
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   221
    {
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   222
        allocator.Free(retval);
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        BAIL_MACRO(PHYSFS_ERR_OUT_OF_MEMORY, NULL);
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   224
    } /* else */
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   225
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    return retval;
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} /* convertCFString */
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   228
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   229
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char *__PHYSFS_platformCalcBaseDir(const char *argv0)
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   231
{
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   232
    CFURLRef cfurl = NULL;
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   233
    CFStringRef cfstr = NULL;
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   234
    CFMutableStringRef cfmutstr = NULL;
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   235
    char *retval = NULL;
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   236
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   237
    cfurl = CFBundleCopyBundleURL(CFBundleGetMainBundle());
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   238
    BAIL_IF_MACRO(cfurl == NULL, PHYSFS_ERR_OS_ERROR, NULL);
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   239
    cfstr = CFURLCopyFileSystemPath(cfurl, kCFURLPOSIXPathStyle);
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   240
    CFRelease(cfurl);
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   241
    BAIL_IF_MACRO(!cfstr, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
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   242
    cfmutstr = CFStringCreateMutableCopy(cfallocator, 0, cfstr);
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   243
    CFRelease(cfstr);
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   244
    BAIL_IF_MACRO(!cfmutstr, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
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   245
    CFStringAppendCString(cfmutstr, "/", kCFStringEncodingUTF8);
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   246
    retval = convertCFString(cfmutstr);
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   247
    CFRelease(cfmutstr);
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   248
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   249
    return retval;  /* whew. */
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   250
} /* __PHYSFS_platformCalcBaseDir */
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   251
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   252
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   253
char *__PHYSFS_platformCalcPrefDir(const char *org, const char *app)
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   254
{
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   255
    /* !!! FIXME: there's a real API to determine this */
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   256
    const char *userdir = __PHYSFS_getUserDir();
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   257
    const char *append = "Library/Application Support/";
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   258
    const size_t len = strlen(userdir) + strlen(append) + strlen(app) + 2;
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   259
    char *retval = allocator.Malloc(len);
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   260
    BAIL_IF_MACRO(!retval, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
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   261
    snprintf(retval, len, "%s%s%s/", userdir, append, app);
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   262
    return retval;
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   263
} /* __PHYSFS_platformCalcPrefDir */
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   264
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   265
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   266
/* Platform allocator uses default CFAllocator at PHYSFS_init() time. */
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   267
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   268
static CFAllocatorRef cfallocdef = NULL;
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   269
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   270
static int macosxAllocatorInit(void)
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   271
{
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   272
    int retval = 0;
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   273
    cfallocdef = CFAllocatorGetDefault();
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   274
    retval = (cfallocdef != NULL);
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   275
    if (retval)
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   276
        CFRetain(cfallocdef);
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   277
    return retval;
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   278
} /* macosxAllocatorInit */
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   279
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   280
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   281
static void macosxAllocatorDeinit(void)
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   282
{
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   283
    if (cfallocdef != NULL)
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   284
    {
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   285
        CFRelease(cfallocdef);
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   286
        cfallocdef = NULL;
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   287
    } /* if */
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   288
} /* macosxAllocatorDeinit */
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   289
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   290
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   291
static void *macosxAllocatorMalloc(PHYSFS_uint64 s)
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   292
{
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diff changeset
   293
    if (!__PHYSFS_ui64FitsAddressSpace(s))
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   294
        BAIL_MACRO(PHYSFS_ERR_OUT_OF_MEMORY, NULL);
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   295
    return CFAllocatorAllocate(cfallocdef, (CFIndex) s, 0);
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   296
} /* macosxAllocatorMalloc */
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   297
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   298
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   299
static void *macosxAllocatorRealloc(void *ptr, PHYSFS_uint64 s)
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   300
{
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diff changeset
   301
    if (!__PHYSFS_ui64FitsAddressSpace(s))
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   302
        BAIL_MACRO(PHYSFS_ERR_OUT_OF_MEMORY, NULL);
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   303
    return CFAllocatorReallocate(cfallocdef, ptr, (CFIndex) s, 0);
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   304
} /* macosxAllocatorRealloc */
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   305
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diff changeset
   306
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   307
static void macosxAllocatorFree(void *ptr)
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diff changeset
   308
{
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diff changeset
   309
    CFAllocatorDeallocate(cfallocdef, ptr);
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   310
} /* macosxAllocatorFree */
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   311
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   312
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   313
int __PHYSFS_platformSetDefaultAllocator(PHYSFS_Allocator *a)
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   314
{
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diff changeset
   315
    allocator.Init = macosxAllocatorInit;
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diff changeset
   316
    allocator.Deinit = macosxAllocatorDeinit;
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diff changeset
   317
    allocator.Malloc = macosxAllocatorMalloc;
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diff changeset
   318
    allocator.Realloc = macosxAllocatorRealloc;
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diff changeset
   319
    allocator.Free = macosxAllocatorFree;
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   320
    return 1;  /* return non-zero: we're supplying custom allocator. */
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diff changeset
   321
} /* __PHYSFS_platformSetDefaultAllocator */
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   322
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   323
#endif /* PHYSFS_PLATFORM_MACOSX */
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   324
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   325
/* end of macosx.c ... */
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   326