1 files changed, 50 insertions, 0 deletions
diff --git a/decoder/json_parse.cc b/decoder/json_parse.cc
new file mode 100644
index 00000000..f6fdfea8
--- /dev/null
+++ b/decoder/json_parse.cc
@@ -0,0 +1,50 @@
+#include "json_parse.h"
+
+#include <string>
+#include <iostream>
+
+using namespace std;
+
+static const char *json_hex_chars = "0123456789abcdef";
+
+void JSONParser::WriteEscapedString(const string& in, ostream* out) {
+  int pos = 0;
+  int start_offset = 0;
+  unsigned char c = 0;
+  (*out) << '"';
+  while(pos < in.size()) {
+    c = in[pos];
+    switch(c) {
+    case '\b':
+    case '\n':
+    case '\r':
+    case '\t':
+    case '"':
+    case '\\':
+    case '/':
+      if(pos - start_offset > 0)
+	(*out) << in.substr(start_offset, pos - start_offset);
+      if(c == '\b') (*out) << "\\b";
+      else if(c == '\n') (*out) << "\\n";
+      else if(c == '\r') (*out) << "\\r";
+      else if(c == '\t') (*out) << "\\t";
+      else if(c == '"') (*out) << "\\\"";
+      else if(c == '\\') (*out) << "\\\\";
+      else if(c == '/') (*out) << "\\/";
+      start_offset = ++pos;
+      break;
+    default:
+      if(c < ' ') {
+        cerr << "Warning, bad character (" << static_cast<int>(c) << ") in string\n";
+	if(pos - start_offset > 0)
+	  (*out) << in.substr(start_offset, pos - start_offset);
+	(*out) << "\\u00" << json_hex_chars[c >> 4] << json_hex_chars[c & 0xf];
+	start_offset = ++pos;
+      } else pos++;
+    }
+  }
+  if(pos - start_offset > 0)
+    (*out) << in.substr(start_offset, pos - start_offset);
+  (*out) << '"';
+}
+