Provide a way to dump json when it is known there is no utf8 in it

src/jansson-2.6/src/dump.c

@@ -65,6 +65,21 @@ static int dump_indent(size_t flags, int depth, int space, json_dump_callback_t
     return 0;
 }
 
+static const char *noutf8_iterate(const char *buffer, int32_t *codepoint)
+{
+    int32_t value;
+
+    if(!*buffer)
+        return buffer;
+
+    value = (unsigned char)buffer[0];
+
+    if(codepoint)
+        *codepoint = value;
+
+    return buffer + 1;
+}
+
 static int dump_string(const char *str, json_dump_callback_t dump, void *data, size_t flags)
 {
     const char *pos, *end;
@@ -82,7 +97,10 @@ static int dump_string(const char *str, json_dump_callback_t dump, void *data, s
 
         while(*end)
         {
-            end = utf8_iterate(pos, &codepoint);
+            if(flags & JSON_NO_UTF8)
+		    end = noutf8_iterate(pos, &codepoint);
+	    else
+		    end = utf8_iterate(pos, &codepoint);
             if(!end)
                 return -1;
 

src/jansson-2.6/src/jansson.h

@@ -260,6 +260,7 @@ json_t *json_load_callback(json_load_callback_t callback, void *data, size_t fla
 #define JSON_PRESERVE_ORDER 0x100
 #define JSON_ENCODE_ANY     0x200
 #define JSON_ESCAPE_SLASH   0x400
+#define JSON_NO_UTF8        0x800
 
 typedef int (*json_dump_callback_t)(const char *buffer, size_t size, void *data);