use re2c to parse depfiles

1 files changed, 150 insertions, 0 deletions

diff --git a/src/depfile_parser.cc b/src/depfile_parser.cc
new file mode 100644
index 0000000..7be4a60
--- /dev/null
+++ b/src/depfile_parser.cc
@@ -0,0 +1,150 @@
+/* Generated by re2c 0.13.5 */
+#line 1 "src/depfile_parser.in.cc"
+// Copyright 2011 Google Inc. All Rights Reserved.
+//
+// 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.
+
+#include "depfile_parser.h"
+
+bool DepfileParser::Parse(const string& content, string* err) {
+  const char* p = content.data();
+  const char* end = content.data() + content.size();
+  for (;;) {
+    const char* start = p;
+    char yych;
+    
+#line 27 "src/depfile_parser.cc"
+    {
+      static const unsigned char yybm[] = {
+          0,   0,   0,   0,   0,   0,   0,   0, 
+          0,   0, 128,   0,   0,   0,   0,   0, 
+          0,   0,   0,   0,   0,   0,   0,   0, 
+          0,   0,   0,   0,   0,   0,   0,   0, 
+        128,   0,   0,   0,   0,   0,   0,   0, 
+          0,   0,   0,  64,  64,  64,  64,  64, 
+         64,  64,  64,  64,  64,  64,  64,  64, 
+         64,  64,  64,   0,   0,   0,   0,   0, 
+          0,  64,  64,  64,  64,  64,  64,  64, 
+         64,  64,  64,  64,  64,  64,  64,  64, 
+         64,  64,  64,  64,  64,  64,  64,  64, 
+         64,  64,  64,   0,   0,   0,   0,  64, 
+          0,  64,  64,  64,  64,  64,  64,  64, 
+         64,  64,  64,  64,  64,  64,  64,  64, 
+         64,  64,  64,  64,  64,  64,  64,  64, 
+         64,  64,  64,   0,   0,   0,   0,   0, 
+          0,   0,   0,   0,   0,   0,   0,   0, 
+          0,   0,   0,   0,   0,   0,   0,   0, 
+          0,   0,   0,   0,   0,   0,   0,   0, 
+          0,   0,   0,   0,   0,   0,   0,   0, 
+          0,   0,   0,   0,   0,   0,   0,   0, 
+          0,   0,   0,   0,   0,   0,   0,   0, 
+          0,   0,   0,   0,   0,   0,   0,   0, 
+          0,   0,   0,   0,   0,   0,   0,   0, 
+          0,   0,   0,   0,   0,   0,   0,   0, 
+          0,   0,   0,   0,   0,   0,   0,   0, 
+          0,   0,   0,   0,   0,   0,   0,   0, 
+          0,   0,   0,   0,   0,   0,   0,   0, 
+          0,   0,   0,   0,   0,   0,   0,   0, 
+          0,   0,   0,   0,   0,   0,   0,   0, 
+          0,   0,   0,   0,   0,   0,   0,   0, 
+          0,   0,   0,   0,   0,   0,   0,   0, 
+      };
+
+      if ((end - p) < 2) break;
+      yych = *p;
+      if (yych <= '@') {
+        if (yych <= 0x1F) {
+          if (yych == '\n') goto yy5;
+          goto yy8;
+        } else {
+          if (yych <= ' ') goto yy5;
+          if (yych <= '*') goto yy8;
+          if (yych <= ':') goto yy6;
+          goto yy8;
+        }
+      } else {
+        if (yych <= '^') {
+          if (yych <= 'Z') goto yy6;
+          if (yych == '\\') goto yy3;
+          goto yy8;
+        } else {
+          if (yych == '`') goto yy8;
+          if (yych <= 'z') goto yy6;
+          goto yy8;
+        }
+      }
+yy2:
+#line 38 "src/depfile_parser.in.cc"
+      { continue; }
+#line 90 "src/depfile_parser.cc"
+yy3:
+      ++p;
+      if ((yych = *p) == '\n') goto yy13;
+yy4:
+#line 48 "src/depfile_parser.in.cc"
+      {
+      *err = "BUG: depfile lexer encountered unknown state";
+      return false;
+    }
+#line 100 "src/depfile_parser.cc"
+yy5:
+      yych = *++p;
+      goto yy12;
+yy6:
+      ++p;
+      yych = *p;
+      goto yy10;
+yy7:
+#line 39 "src/depfile_parser.in.cc"
+      {
+      // Got a filename.
+      if (p[-1] == ':') {
+        out_ = StringPiece(start, p - start - 1);
+      } else {
+        ins_.push_back(StringPiece(start, p - start));
+      }
+      continue;
+    }
+#line 119 "src/depfile_parser.cc"
+yy8:
+      yych = *++p;
+      goto yy4;
+yy9:
+      ++p;
+      if (end <= p) break;
+      yych = *p;
+yy10:
+      if (yybm[0+yych] & 64) {
+        goto yy9;
+      }
+      goto yy7;
+yy11:
+      ++p;
+      if (end <= p) break;
+      yych = *p;
+yy12:
+      if (yybm[0+yych] & 128) {
+        goto yy11;
+      }
+      goto yy2;
+yy13:
+      ++p;
+#line 37 "src/depfile_parser.in.cc"
+      { continue; }
+#line 145 "src/depfile_parser.cc"
+    }
+#line 52 "src/depfile_parser.in.cc"
+
+  }
+  return true;
+}