Add http_status_str() function.

Fixes: https://github.com/nodejs/http-parser/issues/371
PR-URL: https://github.com/nodejs/http-parser/pull/429
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

http_parser.c

@@ -2096,6 +2096,16 @@ http_method_str (enum http_method m)
   return ELEM_AT(method_strings, m, "<unknown>");
 }
 
+const char *
+http_status_str (enum http_status s)
+{
+  switch (s) {
+#define XX(num, name, string) case HTTP_STATUS_##name: return #string;
+    HTTP_STATUS_MAP(XX)
+#undef XX
+    default: return "<unknown>";
+  }
+}
 
 void
 http_parser_init (http_parser *parser, enum http_parser_type t)

http_parser.h

@@ -407,6 +407,9 @@ int http_should_keep_alive(const http_parser *parser);
 /* Returns a string version of the HTTP method. */
 const char *http_method_str(enum http_method m);
 
+/* Returns a string version of the HTTP status code. */
+const char *http_status_str(enum http_status s);
+
 /* Return a string name of the given error */
 const char *http_errno_name(enum http_errno err);
 

test.c

@@ -3374,6 +3374,14 @@ test_method_str (void)
   assert(0 == strcmp("<unknown>", http_method_str(1337)));
 }
 
+void
+test_status_str (void)
+{
+  assert(0 == strcmp("OK", http_status_str(HTTP_STATUS_OK)));
+  assert(0 == strcmp("Not Found", http_status_str(HTTP_STATUS_NOT_FOUND)));
+  assert(0 == strcmp("<unknown>", http_status_str(1337)));
+}
+
 void
 test_message (const struct message *message)
 {
@@ -4104,6 +4112,7 @@ main (void)
   test_preserve_data();
   test_parse_url();
   test_method_str();
+  test_status_str();
 
   //// NREAD
   test_header_nread_value();