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Add kCFURLTypeIdentifierKey to CFURL(and NSURL)

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This commit is contained in:
ckegel 2023-04-07 20:13:04 -04:00
parent aa4fa49413
commit 80a41ef752
1 changed files with 48 additions and 0 deletions
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48
NSURL.m
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@ -17,6 +17,7 @@
#import <objc/runtime.h>
#include <sys/statvfs.h>
#include <sys/stat.h>
#include <dlfcn.h>
#define STACK_BUFFER_SIZE 100 // pretty safe bet this will be quite unlikely to use more than this since there are only 94 properties
@ -156,6 +157,17 @@ static void posixError(CFErrorRef *error) {
CFRelease(err);
}
static void dlError(CFErrorRef *error) {
int saved_errno = errno;
const CFStringRef key = kCFErrorUnderlyingErrorKey;
CFStringRef underlyingError = CFStringCreateWithCString(kCFAllocatorDefault, dlerror(), kCFStringEncodingUTF8);
CFTypeRef value = underlyingError;
if(error != NULL)
*error = CFErrorCreateWithUserInfoKeysAndValues(kCFAllocatorDefault, kCFErrorDomainPOSIX, saved_errno, (const void *const *) &key, (const void *const *) &value, 1);
CFRelease(underlyingError);
};
static Boolean CFURLStat(CFURLRef url, struct stat *info) {
UInt8 path[PATH_MAX] = { 0 };
@ -351,7 +363,43 @@ static CFTypeRef CFURLCreatePropertyForKey(CFURLRef url, CFStringRef key, CFErro
else if (CFEqual(key, kCFURLTypeIdentifierKey))
{
// Key for the resource’s uniform type identifier (UTI), returned as a CFString object.
static dispatch_once_t pred;
static void* LaunchServicesHandle;
static CFErrorRef LaunchServicesHandleError;
dispatch_once(&pred, ^{
LaunchServicesHandle = dlopen("/System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/LaunchServices", RTLD_LAZY | RTLD_LOCAL);
if(LaunchServicesHandle == NULL)
dlError(&LaunchServicesHandleError);
});
if(LaunchServicesHandle == NULL){
if (error != NULL)
*error = CFRetain(LaunchServicesHandleError);
return NULL;
}
static CFStringRef (*UTTypeCreatePreferredIdentifierForTag)(CFStringRef, CFStringRef, _Nullable CFStringRef);
static CFStringRef *tagType;
static dispatch_once_t dlsym_pred;
dispatch_once(&dlsym_pred, ^{
UTTypeCreatePreferredIdentifierForTag = dlsym(LaunchServicesHandle, "UTTypeCreatePreferredIdentifierForTag");
tagType = dlsym(LaunchServicesHandle, "kUTTagClassFilenameExtension");
if(UTTypeCreatePreferredIdentifierForTag == NULL || tagType == NULL)
dlError(&LaunchServicesHandleError);
});
if(UTTypeCreatePreferredIdentifierForTag == NULL || tagType == NULL){
if (error != NULL)
*error = CFRetain(LaunchServicesHandleError);
return NULL;
}
CFStringRef extension = CFURLCopyPathExtension(url);
value = UTTypeCreatePreferredIdentifierForTag(*tagType, extension, NULL);
CFRelease(extension);
}
else if (CFEqual(key, kCFURLLocalizedTypeDescriptionKey))
{