First cut at pruning things/updating things.

Remove a bunch of code that Google stopped using/maintaining rather than trying
to update it it. Some would be hard to update, some actually has system provided
replacements; others are patterns that just don't seem as common now.

Prune out the code related to macOS <= 10.5, start pruning some of the really
old iOS support also.

Get the projects mostly limping again with modern Xcodes so tests can be run.

If someone ends up on this commit via history for something they still find
as useful, feel free to do a pull request to bring the snippet of code back to
life and update it for current SDKs.

1 files changed, 2 insertions, 154 deletions

diff --git a/Foundation/GTMObjC2Runtime.m b/Foundation/GTMObjC2Runtime.m
index 1475103..9bd937c 100644
--- a/Foundation/GTMObjC2Runtime.m
+++ b/Foundation/GTMObjC2Runtime.m
@@ -16,158 +16,6 @@
 //  the License.
 //
 
-#import "GTMObjC2Runtime.h"
+// This source file is no longer necessary.
 
-// Export a nonsense symbol to suppress a libtool warning when this is linked alone in a static lib.
-__attribute__((visibility("default"))) char GTMObjC2RuntimeExportToSuppressLibToolWarning = 0;
-
-
-#if GTM_MACOS_SDK && (MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_5) && !__OBJC2__
-#import <objc/objc-runtime.h>
-#import <stdlib.h>
-#import <string.h>
-
-Class object_getClass(id obj) {
-  if (!obj) return NULL;
-  return obj->isa;
-}
-
-const char *class_getName(Class cls) {
-  if (!cls) return "nil";
-  return cls->name;
-}
-
-BOOL class_conformsToProtocol(Class cls, Protocol *protocol) {
-  // We intentionally don't check cls as it crashes on Leopard so we want
-  // to crash on Tiger as well.
-  // I logged
-  // Radar 5572978 class_conformsToProtocol crashes when arg1 is passed as nil
-  // because it seems odd that this API won't accept nil for cls considering
-  // all the other apis will accept nil args.
-  // If this does get fixed, remember to enable the unit tests.
-  if (!protocol) return NO;
-
-  struct objc_protocol_list *protos;
-  for (protos = cls->protocols; protos != NULL; protos = protos->next) {
-    for (long i = 0; i < protos->count; i++) {
-      if ([protos->list[i] conformsTo:protocol]) {
-        return YES;
-      }
-    }
-  }
-  return NO;
-}
-
-Class class_getSuperclass(Class cls) {
-  if (!cls) return NULL;
-  return cls->super_class;
-}
-
-BOOL class_respondsToSelector(Class cls, SEL sel) {
-  return class_getInstanceMethod(cls, sel) != nil;
-}
-
-Method *class_copyMethodList(Class cls, unsigned int *outCount) {
-  if (!cls) return NULL;
-
-  unsigned int count = 0;
-  void *iterator = NULL;
-  struct objc_method_list *mlist;
-  Method *methods = NULL;
-  if (outCount) *outCount = 0;
-
-  while ( (mlist = class_nextMethodList(cls, &iterator)) ) {
-    if (mlist->method_count == 0) continue;
-    Method *new_methods = (Method *)realloc(methods,
-                                            sizeof(Method) * (count + mlist->method_count + 1));
-    if (!new_methods) {
-      // COV_NF_START
-      //Memory alloc failed, so what can we do?
-      free(methods);
-      return NULL;
-      // COV_NF_END
-    } else {
-      methods = new_methods;
-    }
-    for (int i = 0; i < mlist->method_count; i++) {
-      methods[i + count] = &mlist->method_list[i];
-    }
-    count += mlist->method_count;
-  }
-
-  // List must be NULL terminated
-  if (methods) {
-    methods[count] = NULL;
-  }
-  if (outCount) *outCount = count;
-  return methods;
-}
-
-SEL method_getName(Method method) {
-  if (!method) return NULL;
-  return method->method_name;
-}
-
-IMP method_getImplementation(Method method) {
-  if (!method) return NULL;
-  return method->method_imp;
-}
-
-IMP method_setImplementation(Method method, IMP imp) {
-  // We intentionally don't test method for nil.
-  // Leopard fails here, so should we.
-  // I logged this as Radar:
-  // 5572981 method_setImplementation crashes if you pass nil for the
-  // method arg (arg 1)
-  // because it seems odd that this API won't accept nil for method considering
-  // all the other apis will accept nil args.
-  // If this does get fixed, remember to enable the unit tests.
-  // This method works differently on SnowLeopard than
-  // on Leopard. If you pass in a nil for IMP on SnowLeopard
-  // it doesn't change anything. On Leopard it will. Since
-  // attempting to change a sel to nil is probably an error
-  // we follow the SnowLeopard way of doing things.
-  IMP oldImp = NULL;
-  if (imp) {
-    oldImp = method->method_imp;
-    method->method_imp = imp;
-  }
-  return oldImp;
-}
-
-void method_exchangeImplementations(Method m1, Method m2) {
-  if (m1 == m2) return;
-  if (!m1 || !m2) return;
-  IMP imp2 = method_getImplementation(m2);
-  IMP imp1 = method_setImplementation(m1, imp2);
-  method_setImplementation(m2, imp1);
-}
-
-struct objc_method_description protocol_getMethodDescription(Protocol *p,
-                                                             SEL aSel,
-                                                             BOOL isRequiredMethod,
-                                                             BOOL isInstanceMethod) {
-  struct objc_method_description *descPtr = NULL;
-  // No such thing as required in ObjC1.
-  if (isInstanceMethod) {
-    descPtr = [p descriptionForInstanceMethod:aSel];
-  } else {
-    descPtr = [p descriptionForClassMethod:aSel];
-  }
-
-  struct objc_method_description desc;
-  if (descPtr) {
-    desc = *descPtr;
-  } else {
-    bzero(&desc, sizeof(desc));
-  }
-  return desc;
-}
-
-BOOL sel_isEqual(SEL lhs, SEL rhs) {
-  // Apple (informally) promises this will work in the future:
-  // http://twitter.com/#!/gparker/status/2400099786
-  return (lhs == rhs) ? YES : NO;
-}
-
-#endif  // GTM_MACOS_SDK && (MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_5)
+#pragma GCC warning "GTMObjc2Runtime.m is deprecated and should no longer be used."