initial checkin

git-svn-id: https://ws10smt.googlecode.com/svn/trunk@2 ec762483-ff6d-05da-a07a-a48fb63a330f

1 files changed, 58 insertions, 0 deletions

diff --git a/decoder/json_parse.h b/decoder/json_parse.h
new file mode 100644
index 00000000..c3cba954
--- /dev/null
+++ b/decoder/json_parse.h
@@ -0,0 +1,58 @@
+#ifndef _JSON_WRAPPER_H_
+#define _JSON_WRAPPER_H_
+
+#include <iostream>
+#include <cassert>
+#include "JSON_parser.h"
+
+class JSONParser {
+ public:
+  JSONParser() {
+    init_JSON_config(&config);
+    hack.mf = &JSONParser::Callback;
+    config.depth = 10;
+    config.callback_ctx = reinterpret_cast<void*>(this);
+    config.callback = hack.cb;
+    config.allow_comments = 1;
+    config.handle_floats_manually = 1;
+    jc = new_JSON_parser(&config);
+  }
+  virtual ~JSONParser() {
+    delete_JSON_parser(jc);
+  }
+  bool Parse(std::istream* in) {
+    int count = 0;
+    int lc = 1;
+    for (; in ; ++count) {
+      int next_char = in->get();
+      if (!in->good()) break;
+      if (lc == '\n') { ++lc; }
+      if (!JSON_parser_char(jc, next_char)) {
+        std::cerr << "JSON_parser_char: syntax error, line " << lc << " (byte " << count << ")" << std::endl;
+        return false;
+      }
+    }
+    if (!JSON_parser_done(jc)) {
+      std::cerr << "JSON_parser_done: syntax error\n";
+      return false;
+    }
+    return true;
+  }
+  static void WriteEscapedString(const std::string& in, std::ostream* out);
+ protected:
+  virtual bool HandleJSONEvent(int type, const JSON_value* value) = 0;
+ private:
+  int Callback(int type, const JSON_value* value) {
+    if (HandleJSONEvent(type, value)) return 1;
+    return 0;
+  }
+  JSON_parser_struct* jc;
+  JSON_config config;
+  typedef int (JSONParser::* MF)(int type, const struct JSON_value_struct* value);
+  union CBHack {
+    JSON_parser_callback cb;
+    MF mf;
+  } hack;
+};
+
+#endif