Added the ability to print an error message when no command line attr…

…ibute is given
sichvoge · Apr 26, 2012 · 643cc85 · 643cc85
1 parent 0d8ff2c
commit 643cc85
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Showing 3 changed files with 13 additions and 6 deletions.
diff --git a/DBScan.xcodeproj/project.pbxproj b/DBScan.xcodeproj/project.pbxproj
@@ -86,10 +86,10 @@
 				80ED19411546ACCA00B630EC /* DistanceFunction.h */,
 				80ED19421546ACCA00B630EC /* EuclidianDistanceFunction.h */,
 				80ED19431546ACCA00B630EC /* EuclidianDistanceFunction.m */,
+				80ED19471546ACCA00B630EC /* SourceLoader.h */,
 				80ED19441546ACCA00B630EC /* FileSourceLoader.h */,
 				80ED19451546ACCA00B630EC /* FileSourceLoader.m */,
 				80ED19461546ACCA00B630EC /* main.m */,
-				80ED19471546ACCA00B630EC /* SourceLoader.h */,
 			);
 			path = Sources;
 			sourceTree = "<group>";

diff --git a/Sources/FileSourceLoader.m b/Sources/FileSourceLoader.m
@@ -11,8 +11,9 @@
 @implementation FileSourceLoader
 
 - (NSArray *)load:(NSString *)url {
-    NSString *content = [NSString stringWithContentsOfFile:url encoding:NSUTF8StringEncoding error:nil];
-
+    NSString *content = [NSString stringWithContentsOfFile:url
+                                                  encoding:NSUTF8StringEncoding
+                                                     error:nil];
     return [content componentsSeparatedByCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"\r\n"]];
 }
 

diff --git a/Sources/main.m b/Sources/main.m
@@ -16,9 +16,15 @@
 
 int main(int argc, const char *argv[]) {
     @autoreleasepool {
-        id <SourceLoader> loader = [FileSourceLoader new];
-
-        NSArray *pointsEntries = [loader load:[[[NSProcessInfo processInfo] arguments] objectAtIndex:1]];
+        NSArray *pointsEntries;
+
+        if ([[[NSProcessInfo processInfo] arguments] count] > 1) {
+            id <SourceLoader> loader = [FileSourceLoader new];
+            pointsEntries = [loader load:[[[NSProcessInfo processInfo] arguments] objectAtIndex:1]];
+        } else {
+            NSLog(@"Pass the file path with point entries as an argument to this application.");
+            exit(0);
+        }
 
         NSMutableArray *points = [NSMutableArray arrayWithCapacity:pointsEntries.count];