refactor duplication (shouldSkip and skip_name) into a utility function

gm/gmmain.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 /*
  * Code for the "gm" (Golden Master) rendering comparison tool.
  *
@@ skipping 1392 matching lines @@
 
 static int findConfig(const char config[]) {
     for (size_t i = 0; i < SK_ARRAY_COUNT(gRec); i++) {
         if (!strcmp(config, gRec[i].fName)) {
             return (int) i;
         }
     }
     return -1;
 }
 
-static bool skip_name(SkCommandLineFlags::StringArray array, const char name[]) {
-    // FIXME: this duplicates the logic in test/skia_test.cpp -- consolidate
-    int count = array.count();
-    size_t testLen = strlen(name);
-    bool anyExclude = count == 0;
-    for (int i = 0; i < array.count(); ++i) {
-        const char* matchName = array[i];
-        size_t matchLen = strlen(matchName);
-        bool matchExclude, matchStart, matchEnd;
-        if ((matchExclude = matchName[0] == '~')) {
-            anyExclude = true;
-            matchName++;
-            matchLen--;
-        }
-        if ((matchStart = matchName[0] == '^')) {
-            matchName++;
-            matchLen--;
-        }
-        if ((matchEnd = matchName[matchLen - 1] == '$')) {
-            matchLen--;
-        }
-        if (matchStart ? (!matchEnd || matchLen == testLen)
-                && strncmp(name, matchName, matchLen) == 0
-                : matchEnd ? matchLen <= testLen
-                && strncmp(name + testLen - matchLen, matchName, matchLen) == 0
-                : strstr(name, matchName) != 0) {
-            return matchExclude;
-        }
-    }
-    return !anyExclude;
-}
-
 namespace skiagm {
 #if SK_SUPPORT_GPU
 SkAutoTUnref<GrContext> gGrContext;
 /**
  * Sets the global GrContext, accessible by individual GMs
  */
 static void SetGr(GrContext* grContext) {
     SkSafeRef(grContext);
     gGrContext.reset(grContext);
 }
@@ skipping 614 matching lines @@
         SkAutoTDelete<GM> adgm(gm);
         ++gmIndex;
         if (moduloRemainder >= 0) {
             if ((gmIndex % moduloDivisor) != moduloRemainder) {
                 continue;
             }
             moduloStr.printf("[%d.%d] ", gmIndex, moduloDivisor);
         }
 
         const char* shortName = gm->shortName();
-        if (skip_name(FLAGS_match, shortName)) {
+
+        SkTDArray<const char*> matchStrs;
+        for (int i = 0; i < FLAGS_match.count(); ++i) {
+            matchStrs.push(FLAGS_match[i]);
+        }
+        if (SkCommandLineFlags::ShouldSkip(matchStrs, shortName)) {
             continue;
         }
 
         gmsRun++;
         SkISize size = gm->getISize();
         gm_fprintf(stdout, "%sdrawing... %s [%d %d]\n", moduloStr.c_str(), shortName,
                    size.width(), size.height());
 
         run_multiple_configs(gmmain, gm, configs, grFactory);
 
@@ skipping 72 matching lines @@
     if (FLAGS_forceBWtext) {
         canvas->setDrawFilter(SkNEW(BWTextDrawFilter))->unref();
     }
 }
 
 #if !defined(SK_BUILD_FOR_IOS) && !defined(SK_BUILD_FOR_NACL)
 int main(int argc, char * const argv[]) {
     return tool_main(argc, (char**) argv);
 }
 #endif