Visual Studio generators for GN

tools/gn/visual_studio_utils.cc

Index: tools/gn/visual_studio_utils.cc
diff --git a/tools/gn/visual_studio_utils.cc b/tools/gn/visual_studio_utils.cc
new file mode 100644
index 0000000000000000000000000000000000000000..2502b9dfe18447cb3a83c870ff1a2dfc59f6efaa
--- /dev/null
+++ b/tools/gn/visual_studio_utils.cc
@@ -0,0 +1,113 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "tools/gn/visual_studio_utils.h"
+
+#include "base/md5.h"
+#include "base/strings/string_util.h"
+
+std::string MakeGuid(const std::string& entry_path, const std::string& seed) {
+  std::string str = base::ToUpperASCII(base::MD5String(seed + entry_path));
+  return '{' + str.substr(0, 8) + '-' + str.substr(8, 4) + '-' +
+         str.substr(12, 4) + '-' + str.substr(16, 4) + '-' +
+         str.substr(20, 12) + '}';
+}
+
+#define SetOption(condition, member, value) \
+  if (condition) {                          \
+    options->member = value;                \
+    return;                                 \
+  }
+
+#define AppendOption(condition, member, value, separator) \
+  if (condition) {                                        \
+    options->member += value + separator;                 \
+    return;                                               \
+  }
+
+void ParseCompilerOption(const std::string& cflag, CompilerOptions* options) {
+  if (cflag.size() > 2 && cflag[0] == '/') {
+    switch (cflag[1]) {
+      case 'F':
+        AppendOption(cflag.size() > 3 && cflag[2] == 'I', forced_include_files,
+                     cflag.substr(3), ';')
+        break;
+
+      case 'G':
+        if (cflag[2] == 'S') {
+          SetOption(cflag.size() == 3, buffer_security_check, "true")
+          SetOption(cflag.size() == 4 && cflag[3] == '-',
+                    buffer_security_check, "false")
+        }
+        break;
+
+      case 'M':
+        switch (cflag[2]) {
+          case 'D':
+            SetOption(cflag.size() == 3, runtime_library, "MultiThreadedDLL")
+            SetOption(cflag.size() == 4 && cflag[3] == 'd', runtime_library,
+                      "MultiThreadedDebugDLL")
+            break;
+
+          case 'T':
+            SetOption(cflag.size() == 3, runtime_library, "MultiThreaded")
+            SetOption(cflag.size() == 4 && cflag[3] == 'd', runtime_library,
+                      "MultiThreadedDebug")
+            break;
+        }
+        break;
+
+      case 'O':
+        switch (cflag[2]) {
+          case '1':
+            SetOption(cflag.size() == 3, optimization, "MinSpace")
+            break;
+
+          case '2':
+            SetOption(cflag.size() == 3, optimization, "MaxSpeed")
+            break;
+
+          case 'd':
+            SetOption(cflag.size() == 3, optimization, "Disabled")
+            break;
+
+          case 'x':
+            SetOption(cflag.size() == 3, optimization, "Full")
+              break;
+        }
+        break;
+
+      case 'T':
+        // Skip flags that cause treating all source files as C and C++ files.
+        if (cflag.size() == 3 && (cflag[2] == 'C' || cflag[2] == 'P'))
+          return;
+        break;
+
+      case 'W':
+        switch (cflag[2]) {
+          case '0':
+          case '1':
+          case '2':
+          case '3':
+          case '4':
+            SetOption(cflag.size() == 3, warning_level,
+                      std::string("Level") + cflag[2])
+            break;
+
+          case 'X':
+            SetOption(cflag.size() == 3, treat_warning_as_error, "true")
+            break;
+        }
+        break;
+
+      case 'w':
+        AppendOption(cflag.size() > 3 && cflag[2] == 'd',
+                     disable_specific_warnings, cflag.substr(3), ';')
+        break;
+    }
+  }
+
+  // Put everything else into additional_options.
+  options->additional_options += cflag + ' ';
+}