src/platform_macosx.c
author Ryan C. Gordon <icculus@icculus.org>
Tue, 20 Mar 2012 15:38:12 -0400
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parent 1213 050ee17c6e99
child 1242 1e6db80d2393
permissions -rw-r--r--
Reworked the error reporting API. Now we use error codes instead of strings. This is based on work originally done by Christoph Nelles.
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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 <Carbon/Carbon.h>
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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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#include <sys/stat.h>
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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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CFStringRef cfallocDesc(const void *info)
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{
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    return CFStringCreateWithCString(cfallocator, "PhysicsFS",
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                                     kCFStringEncodingASCII);
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} /* cfallocDesc */
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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 = cfallocDesc;
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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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 *  http://developer.apple.com/samplecode/Sample_Code/Devices_and_Hardware/Disks/VolumeToBSDNode/VolumeToBSDNode.c.htm
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 */
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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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   125
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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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   133
    
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    if (!iter)
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        return 0;
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   136
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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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   141
    } /* if */
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   142
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    IOObjectRetain(service);  /* add an extra object reference... */
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   144
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    do
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    {
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   147
        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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   151
            {
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                retval = 1;
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   153
            } /* if */
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   154
        } /* if */
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   155
        IOObjectRelease(service);
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diff changeset
   156
    } while ((service = IOIteratorNext(iter)) && (!retval));
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diff changeset
   157
                
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   158
    IOObjectRelease(iter);
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   159
    IOObjectRelease(service);
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   160
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    return retval;
847
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   162
} /* darwinIsMountedDisc */
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   163
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   164
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   165
void __PHYSFS_platformDetectAvailableCDs(PHYSFS_StringCallback cb, void *data)
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{
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   167
    const char *devPrefix = "/dev/";
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   168
    const int prefixLen = strlen(devPrefix);
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   169
    mach_port_t masterPort = 0;
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   170
    struct statfs *mntbufp;
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   171
    int i, mounts;
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   172
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   173
    if (IOMasterPort(MACH_PORT_NULL, &masterPort) != KERN_SUCCESS)
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        BAIL_MACRO(PHYSFS_ERR_OS_ERROR, ) /*return void*/;
847
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   175
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   176
    mounts = getmntinfo(&mntbufp, MNT_WAIT);  /* NOT THREAD SAFE! */
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   177
    for (i = 0; i < mounts; i++)
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   178
    {
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   179
        char *dev = mntbufp[i].f_mntfromname;
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   180
        char *mnt = mntbufp[i].f_mntonname;
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   181
        if (strncmp(dev, devPrefix, prefixLen) != 0)  /* a virtual device? */
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   182
            continue;
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   183
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   184
        dev += prefixLen;
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   185
        if (darwinIsMountedDisc(dev, masterPort))
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   186
            cb(data, mnt);
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diff changeset
   187
    } /* for */
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   188
} /* __PHYSFS_platformDetectAvailableCDs */
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   189
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   190
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   191
static char *convertCFString(CFStringRef cfstr)
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   192
{
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diff changeset
   193
    CFIndex len = CFStringGetMaximumSizeForEncoding(CFStringGetLength(cfstr),
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   194
                                                    kCFStringEncodingUTF8) + 1;
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diff changeset
   195
    char *retval = (char *) allocator.Malloc(len);
1240
22d4d1bd4e21 Reworked the error reporting API. Now we use error codes instead of strings.
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   196
    BAIL_IF_MACRO(!retval, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
847
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   197
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   198
    if (CFStringGetCString(cfstr, retval, len, kCFStringEncodingUTF8))
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diff changeset
   199
    {
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   200
        /* shrink overallocated buffer if possible... */
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diff changeset
   201
        CFIndex newlen = strlen(retval) + 1;
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diff changeset
   202
        if (newlen < len)
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diff changeset
   203
        {
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diff changeset
   204
            void *ptr = allocator.Realloc(retval, newlen);
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diff changeset
   205
            if (ptr != NULL)
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diff changeset
   206
                retval = (char *) ptr;
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diff changeset
   207
        } /* if */
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diff changeset
   208
    } /* if */
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diff changeset
   209
5e5e6c067413 Split out Mac OS X code from unix.c and added some Carbon-specific code...
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   210
    else  /* probably shouldn't fail, but just in case... */
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diff changeset
   211
    {
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   212
        allocator.Free(retval);
1240
22d4d1bd4e21 Reworked the error reporting API. Now we use error codes instead of strings.
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   213
        BAIL_MACRO(PHYSFS_ERR_OUT_OF_MEMORY, NULL);
847
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   214
    } /* else */
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   215
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   216
    return retval;
847
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   217
} /* convertCFString */
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   218
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   219
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   220
char *__PHYSFS_platformCalcBaseDir(const char *argv0)
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diff changeset
   221
{
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   222
    ProcessSerialNumber psn = { 0, kCurrentProcess };
1169
ceda1aef5617 Fixed basedir calculation on Mac OS X.
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   223
    struct stat statbuf;
847
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diff changeset
   224
    FSRef fsref;
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diff changeset
   225
    CFRange cfrange;
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parents:
diff changeset
   226
    CFURLRef cfurl = NULL;
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diff changeset
   227
    CFStringRef cfstr = NULL;
5e5e6c067413 Split out Mac OS X code from unix.c and added some Carbon-specific code...
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diff changeset
   228
    CFMutableStringRef cfmutstr = NULL;
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diff changeset
   229
    char *retval = NULL;
1169
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   230
    char *cstr = NULL;
ceda1aef5617 Fixed basedir calculation on Mac OS X.
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diff changeset
   231
    int rc = 0;
847
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diff changeset
   232
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   233
    if (GetProcessBundleLocation(&psn, &fsref) != noErr)
22d4d1bd4e21 Reworked the error reporting API. Now we use error codes instead of strings.
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   234
        BAIL_MACRO(PHYSFS_ERR_OS_ERROR, NULL);
847
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   235
    cfurl = CFURLCreateFromFSRef(cfallocator, &fsref);
1240
22d4d1bd4e21 Reworked the error reporting API. Now we use error codes instead of strings.
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   236
    BAIL_IF_MACRO(cfurl == NULL, PHYSFS_ERR_OS_ERROR, NULL);
847
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   237
    cfstr = CFURLCopyFileSystemPath(cfurl, kCFURLPOSIXPathStyle);
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diff changeset
   238
    CFRelease(cfurl);
1240
22d4d1bd4e21 Reworked the error reporting API. Now we use error codes instead of strings.
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parents: 1213
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   239
    BAIL_IF_MACRO(!cfstr, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
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    cfmutstr = CFStringCreateMutableCopy(cfallocator, 0, cfstr);
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    CFRelease(cfstr);
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    BAIL_IF_MACRO(!cfmutstr, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
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    /* we have to decide if we got a binary's path, or the .app dir... */
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    cstr = convertCFString(cfmutstr);
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    if (cstr == NULL)
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    {
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        CFRelease(cfmutstr);
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        return NULL;
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    } /* if */
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    rc = stat(cstr, &statbuf);
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    allocator.Free(cstr);  /* done with this. */
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    if (rc == -1)
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    {
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        CFRelease(cfmutstr);
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        return NULL;  /* maybe default behaviour will work? */
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    } /* if */
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    if (S_ISREG(statbuf.st_mode))
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    {
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        /* Find last dirsep so we can chop the filename from the path. */
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        cfrange = CFStringFind(cfmutstr, CFSTR("/"), kCFCompareBackwards);
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        if (cfrange.location == kCFNotFound)
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        {
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            assert(0);  /* shouldn't ever hit this... */
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            CFRelease(cfmutstr);
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            return NULL;
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        } /* if */
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        /* chop the "/exename" from the end of the path string... */
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        cfrange.length = CFStringGetLength(cfmutstr) - cfrange.location;
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        CFStringDelete(cfmutstr, cfrange);
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        /* If we're an Application Bundle, chop everything but the base. */
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        cfrange = CFStringFind(cfmutstr, CFSTR("/Contents/MacOS"),
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                               kCFCompareCaseInsensitive |
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                               kCFCompareBackwards |
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                               kCFCompareAnchored);
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        if (cfrange.location != kCFNotFound)
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            CFStringDelete(cfmutstr, cfrange);  /* chop that, too. */
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    } /* if */
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    retval = convertCFString(cfmutstr);
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    CFRelease(cfmutstr);
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    return retval;  /* whew. */
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} /* __PHYSFS_platformCalcBaseDir */
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/* Platform allocator uses default CFAllocator at PHYSFS_init() time. */
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static CFAllocatorRef cfallocdef = NULL;
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static int macosxAllocatorInit(void)
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{
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    int retval = 0;
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    cfallocdef = CFAllocatorGetDefault();
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    retval = (cfallocdef != NULL);
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    if (retval)
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        CFRetain(cfallocdef);
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    return retval;
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} /* macosxAllocatorInit */
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static void macosxAllocatorDeinit(void)
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{
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    if (cfallocdef != NULL)
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    {
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        CFRelease(cfallocdef);
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        cfallocdef = NULL;
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    } /* if */
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} /* macosxAllocatorDeinit */
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   315
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   316
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static void *macosxAllocatorMalloc(PHYSFS_uint64 s)
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{
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    if (!__PHYSFS_ui64FitsAddressSpace(s))
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        BAIL_MACRO(PHYSFS_ERR_OUT_OF_MEMORY, NULL);
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    return CFAllocatorAllocate(cfallocdef, (CFIndex) s, 0);
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} /* macosxAllocatorMalloc */
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   323
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   324
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static void *macosxAllocatorRealloc(void *ptr, PHYSFS_uint64 s)
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{
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   327
    if (!__PHYSFS_ui64FitsAddressSpace(s))
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   328
        BAIL_MACRO(PHYSFS_ERR_OUT_OF_MEMORY, NULL);
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   329
    return CFAllocatorReallocate(cfallocdef, ptr, (CFIndex) s, 0);
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} /* macosxAllocatorRealloc */
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   331
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   332
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static void macosxAllocatorFree(void *ptr)
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{
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    CFAllocatorDeallocate(cfallocdef, ptr);
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   336
} /* macosxAllocatorFree */
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   337
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   338
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int __PHYSFS_platformSetDefaultAllocator(PHYSFS_Allocator *a)
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{
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    allocator.Init = macosxAllocatorInit;
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   342
    allocator.Deinit = macosxAllocatorDeinit;
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    allocator.Malloc = macosxAllocatorMalloc;
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    allocator.Realloc = macosxAllocatorRealloc;
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    allocator.Free = macosxAllocatorFree;
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    return 1;  /* return non-zero: we're supplying custom allocator. */
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} /* __PHYSFS_platformSetDefaultAllocator */
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#endif /* PHYSFS_PLATFORM_MACOSX */
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/* end of macosx.c ... */
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   352