From 2a5219567634ab7ab74314ff3615132becadff4a Mon Sep 17 00:00:00 2001
From: thomasvl <thomasvl@7dc7ac4e-7543-0410-b95c-c1676fc8e2a3>
Date: Mon, 28 Jan 2008 20:19:42 +0000
Subject: initial drop of a few sources to start things out

---
 Foundation/GTMSystemVersion.m | 104 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 104 insertions(+)
 create mode 100644 Foundation/GTMSystemVersion.m

(limited to 'Foundation/GTMSystemVersion.m')

diff --git a/Foundation/GTMSystemVersion.m b/Foundation/GTMSystemVersion.m
new file mode 100644
index 0000000..d9b1923
--- /dev/null
+++ b/Foundation/GTMSystemVersion.m
@@ -0,0 +1,104 @@
+//
+//  GTMSystemVersion.m
+//
+//  Copyright 2007-2008 Google Inc.
+//
+//  Licensed under the Apache License, Version 2.0 (the "License"); you may not
+//  use this file except in compliance with the License.  You may obtain a copy
+//  of the License at
+// 
+//  http://www.apache.org/licenses/LICENSE-2.0
+// 
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+//  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+//  License for the specific language governing permissions and limitations under
+//  the License.
+//
+
+#import "GTMSystemVersion.h"
+#import <Carbon/Carbon.h>
+#import <stdlib.h>
+
+@implementation GTMSystemVersion
+
++ (BOOL)isPanther {
+  long major, minor;
+  [self getMajor:&major minor:&minor bugFix:nil];
+  return major == 10 && minor == 3;
+}
+
++ (BOOL)isTiger {
+  long major, minor;
+  [self getMajor:&major minor:&minor bugFix:nil];
+  return major == 10 && minor == 4;
+}
+
++ (BOOL)isLeopard {
+  long major, minor;
+  [self getMajor:&major minor:&minor bugFix:nil];
+  return major == 10 && minor == 5;
+}
+
++ (BOOL)isPantherOrGreater {
+  long major, minor;
+  [self getMajor:&major minor:&minor bugFix:nil];
+  return (major > 10) || (major == 10 && minor >= 3);
+}
+
++ (BOOL)isTigerOrGreater {
+  long major, minor;
+  [self getMajor:&major minor:&minor bugFix:nil];
+  return (major > 10) || (major == 10 && minor >= 4);
+}
+
++ (BOOL)isLeopardOrGreater {
+  long major, minor;
+  [self getMajor:&major minor:&minor bugFix:nil];
+  return (major > 10) || (major == 10 && minor >= 5);
+}
+
++ (void)getMajor:(long*)major minor:(long*)minor bugFix:(long*)bugFix {
+  long binaryCodedDec;
+  
+  if (major) {
+    require_noerr(Gestalt(gestaltSystemVersionMajor, major), failedGestalt);
+  }
+  if (minor) {
+    require_noerr(Gestalt(gestaltSystemVersionMinor, minor), failedGestalt);
+  }
+  if (bugFix) {
+    require_noerr(Gestalt(gestaltSystemVersionBugFix, bugFix), failedGestalt);
+  }
+  return;
+
+failedGestalt:
+  // gestaltSystemVersionMajor et al are only on 10.4 and above, so they
+  // could fail if we have this code on 10.3.
+  if (Gestalt(gestaltSystemVersion, &binaryCodedDec)) {
+    // not much else we can do...
+    if (major)  *major = 0;
+    if (minor)  *minor = 0;
+    if (bugFix) *bugFix = 0;
+    return;
+  }
+  
+  // Note that this code will return x.9.9 for any system rev parts that are
+  // greater than 9 (ie 10.10.10 will be 10.9.9. This shouldn't ever be a
+  // problem  as the code above takes care of this for any system above 10.4.
+  if (major) {
+    int msb = (binaryCodedDec & 0x0000F000L) >> 12;
+    msb *= 10;
+    int lsb = (binaryCodedDec & 0x00000F00L) >> 8;
+    *major = msb + lsb;
+  }
+  if (minor) {
+    *minor = (binaryCodedDec & 0x000000F0L) >> 4;
+  }
+  if (bugFix) {
+    *bugFix = (binaryCodedDec & 0x0000000FL);
+  }
+  
+}
+
+@end
-- 
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