migrate skpdiff to tools

tools/skpdiff/skpdiff_util.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
-#include <time.h>
-#include <dirent.h>
-#include <glob.h>
+#if SK_BUILD_FOR_MAC || SK_BUILD_FOR_UNIX
+#   include <unistd.h>
+#   include <time.h>
+#   include <sys/time.h>
+#   include <dirent.h>
+#   include <glob.h>
+#elif SK_BUILD_FOR_WIN32
+#   include <windows.h>
+#endif
+
 #include "SkOSFile.h"
 #include "skpdiff_util.h"
 
 #if SK_SUPPORT_OPENCL
 const char* cl_error_to_string(cl_int err) {
     switch (err) {
         case CL_SUCCESS:                         return "CL_SUCCESS";
         case CL_DEVICE_NOT_FOUND:                return "CL_DEVICE_NOT_FOUND";
         case CL_DEVICE_NOT_AVAILABLE:            return "CL_DEVICE_NOT_AVAILABLE";
         case CL_COMPILER_NOT_AVAILABLE:          return "CL_COMPILER_NOT_AVAILABLE";
@@ skipping 38 matching lines @@
         case CL_INVALID_OPERATION:               return "CL_INVALID_OPERATION";
         case CL_INVALID_GL_OBJECT:               return "CL_INVALID_GL_OBJECT";
         case CL_INVALID_BUFFER_SIZE:             return "CL_INVALID_BUFFER_SIZE";
         case CL_INVALID_MIP_LEVEL:               return "CL_INVALID_MIP_LEVEL";
         default:                                 return "UNKNOWN";
     }
     return "UNKNOWN";
 }
 #endif
 
-
+// TODO refactor BenchTimer to be used here
 double get_seconds() {
+#if defined(_POSIX_TIMERS) && defined(CLOCK_REALTIME)
     struct timespec currentTime;
     clock_gettime(CLOCK_REALTIME, &currentTime);
     return currentTime.tv_sec + (double)currentTime.tv_nsec / 1e9;
+#elif SK_BUILD_FOR_MAC || SK_BUILD_FOR_UNIX
+    struct timeval currentTime;
+    gettimeofday(&currentTime, NULL);
+    return currentTime.tv_sec + (double)currentTime.tv_usec / 1e6;
+#elif SK_BUILD_FOR_WIN32
+    LARGE_INTEGER currentTime;
+    LARGE_INTEGER frequency;
+    QueryPerformanceCounter(&currentTime);
+    QueryPerformanceFrequency(&frequency);
+    return (double)currentTime.QuadPart / (double)frequency.QuadPart;
+#endif
 }
 
 bool get_directory(const char path[], SkTArray<SkString>* entries) {
+#if SK_BUILD_FOR_MAC || SK_BUILD_FOR_UNIX
     // Open the directory and check for success
     DIR* dir = opendir(path);
     if (NULL == dir) {
         return false;
     }
 
     // Loop through dir entries until there are none left (i.e. readdir returns NULL)
     struct dirent* entry;
     while ((entry = readdir(dir))) {
         // dirent only gives relative paths, we need to join them to the base path to check if they
         // are directories.
         SkString joinedPath = SkOSPath::SkPathJoin(path, entry->d_name);
 
         // We only care about files
         if (!sk_isdir(joinedPath.c_str())) {
             entries->push_back(SkString(entry->d_name));
         }
     }
 
     closedir(dir);
 
     return true;
+#elif SK_BUILD_FOR_WIN32
+    char pathDirGlob[MAX_PATH];
+    char pathLength = strlen(path);
+    strncpy(pathDirGlob, path, pathLength);
+
+    if (path[pathLength - 1] == '/' || path[pathLength - 1] == '\\') {
+        SkASSERT(pathLength + 2 <= MAX_PATH);
+        pathDirGlob[pathLength] = '*';
+        pathDirGlob[pathLength + 1] = '\0';
+    } else {
+        SkASSERT(pathLength + 3 <= MAX_PATH);
+        pathDirGlob[pathLength] = '\\';
+        pathDirGlob[pathLength + 1] = '*';
+        pathDirGlob[pathLength + 2] = '\0';
+    }
+
+    WIN32_FIND_DATA findFileData;
+    HANDLE hFind = FindFirstFile(pathDirGlob, &findFileData);
+    if (INVALID_HANDLE_VALUE == hFind) {
+        return false;
+    }
+
+    do {
+        if ((findFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) == 0) {
+            entries->push_back(SkString(findFileData.cFileName));
+        }
+    } while (FindNextFile(hFind, &findFileData) != 0);
+
+    FindClose(hFind);
+    return true;
+#endif
 }
 
 bool glob_files(const char globPattern[], SkTArray<SkString>* entries) {
+#if SK_BUILD_FOR_MAC || SK_BUILD_FOR_UNIX
     // TODO Make sure this works on windows. This may require use of FindNextFile windows function.
     glob_t globBuffer;
     if (glob(globPattern, 0, NULL, &globBuffer) != 0) {
         return false;
     }
 
     // Note these paths are in sorted order by default according to http://linux.die.net/man/3/glob
     // Check under the flag GLOB_NOSORT
     char** paths = globBuffer.gl_pathv;
     while(NULL != *paths) {
         entries->push_back(SkString(*paths));
         paths++;
     }
 
     globfree(&globBuffer);
 
     return true;
+#elif SK_BUILD_FOR_WIN32
+    return false;
+#endif
 }