Add [NSURL -checkResourceIsReachableAndReturnError:].

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@33245 72102866-910b-0410-8b05-ffd578937521

ChangeLog

@@ -1,12 +1,17 @@
+2011-06-04  Fred Kiefer <FredKiefer@gmx.de>
+
+	* Headers/Foundation/NSURL.h,
+	* Source/NSURL.m: Add -checkResourceIsReachableAndReturnError:
+
 2011-06-03  Wolfgang Lux  <wolfgang.lux@gmail.com>
 
 	* Source/NSString.m: [(-getLineStart:end:contentsEnd:forRange:)]
-	Fix off-by-one error iun reported contents end for DOS style lines.
+	Fix off-by-one error in reported contents end for DOS style lines.
 
 2011-06-02 Riccardo Mottola <rm@gnu.org>
 
 	* Source/NSTimeZone.m: Disable use of tzname on OpenBSD too.
-	
+
 2011-06-02  Richard Frith-Macdonald <rfm@gnu.org>
 
 	* Source/NSTimeZone.m: Allow for quotes around zone name in

Headers/Foundation/NSURL.h

@@ -34,6 +34,7 @@ extern "C" {
 
 #if	OS_API_VERSION(GS_API_MACOSX, GS_API_LATEST)
 
+@class NSError;
 @class NSNumber;
 
 /**
@@ -68,6 +69,9 @@ GS_EXPORT NSString* const NSURLFileScheme;
 - (NSString*) absoluteString;
 - (NSURL*) absoluteURL;
 - (NSURL*) baseURL;
+#if OS_API_VERSION(100600,GS_API_LATEST) 
+- (BOOL) checkResourceIsReachableAndReturnError: (NSError **)error;
+#endif
 - (NSString*) fragment;
 - (NSString*) host;
 - (BOOL) isFileURL;

Source/NSURL.m

@@ -42,6 +42,7 @@ function may be incorrect
 #import "Foundation/NSCoder.h"
 #import "Foundation/NSData.h"
 #import "Foundation/NSDictionary.h"
+#import "Foundation/NSError.h"
 #import "Foundation/NSException.h"
 #import "Foundation/NSFileManager.h"
 #import "Foundation/NSLock.h"
@@ -1344,6 +1345,43 @@ static NSUInteger	urlAlign;
   return _baseURL;
 }
 
+- (BOOL) checkResourceIsReachableAndReturnError: (NSError **)error
+{
+  NSString *errorStr = nil;
+
+  if ([self isFileURL])
+    {
+      NSFileManager *mgr = [NSFileManager defaultManager];
+      NSString *path = [self path];
+      
+      if ([mgr fileExistsAtPath: path])
+        {
+          if (![mgr isReadableFileAtPath: path])
+            {
+              errorStr = @"File not readable";
+            }
+        }
+      else
+        {
+          errorStr = @"File does not exist";
+        }
+    }
+  else
+    {
+      errorStr = @"No file URL";
+    }
+
+  if ((errorStr != nil) && (error != NULL))
+    {
+      *error = [NSError errorWithDomain: @"NSURLError"
+                                   code: 0 
+                               userInfo: [NSDictionary 
+                                              dictionaryWithObjectsAndKeys: errorStr,
+                                           NSLocalizedDescriptionKey, nil]];
+    }
+  return (errorStr != nil);
+}
+
 /**
  * Returns the fragment portion of the receiver or nil if there is no
  * fragment supplied in the URL.<br />