handle \n etc

textcode/fmt_jsonescape.c

@@ -7,16 +7,24 @@
 size_t fmt_jsonescape(char* dest,const char* src,size_t len) {
   register const unsigned char* s=(const unsigned char*) src;
   size_t written=0,i;
+  char c;
   for (i=0; i<len; ++i) {
     switch (s[i]) {
     case '\\':
     case '"':
+      c=s[i];
+escape:
       if (dest) {
 	dest[written]='\\';
-	dest[written+1]=s[i];
+	dest[written+1]=c;
       }
       written+=2;
       break;
+    case '\n': c='n'; goto escape;
+    case '\r': c='r'; goto escape;
+    case '\b': c='b'; goto escape;
+    case '\t': c='t'; goto escape;
+    case '\f': c='f'; goto escape;
     default:
       if (s[i]<' ') {
 	if (dest) {

textcode/scan_jsonescape.c

@@ -15,6 +15,11 @@ size_t scan_jsonescape(const char *src,char *dest,size_t *destlen) {
 	if (prev!=(unsigned int)-1) return 0; // lead surrogate not followed by tail surrogate
 	// c='\\';	// c already is backslash
 	break;
+      case 'n': c='\n'; break;
+      case 'r': c='\r'; break;
+      case 'b': c='\b'; break;
+      case 'f': c='\f'; break;
+      case 't': c='\t'; break;
       case 'u':
 	{
 	  size_t j;