Fixes issue 388 (#394)

amalgamation.sh

@@ -136,8 +136,8 @@ cat <<< '
 #include "simdjson.h"
 #include "simdjson.cpp"
 int main(int argc, char *argv[]) {
-  if(argc < 3) {
-    std::cerr << "Please specify filenames " << std::endl;
+  if(argc < 2) {
+    std::cerr << "Please specify at least one file name. " << std::endl;
   }
   const char * filename = argv[1];
   simdjson::padded_string p = simdjson::get_corpus(filename);
@@ -147,6 +147,9 @@ int main(int argc, char *argv[]) {
   } else {
     std::cout << "build_parsed_json valid" << std::endl;
   }
+  if(argc == 2) {
+    return EXIT_SUCCESS;
+  }
 
   //JsonStream
   const char * filename2 = argv[2];
@@ -157,7 +160,7 @@ int main(int argc, char *argv[]) {
 
   while (parse_res == simdjson::SUCCESS_AND_HAS_MORE) {
             parse_res = js.json_parse(pj2);
-        }
+  }
 
   if( ! pj2.is_valid()) {
     std::cout << "JsonStream not valid" << std::endl;

src/parsedjson.cpp

@@ -198,7 +198,7 @@ bool ParsedJson::print_json(std::ostream &os) const {
       memcpy(&string_length, string_buf + payload, sizeof(uint32_t));
       print_with_escapes(
           (const unsigned char *)(string_buf + payload + sizeof(uint32_t)),
-          string_length);
+          os, string_length);
       os << '"';
       break;
     case 'l': // we have a long int

tests/basictests.cpp

@@ -168,6 +168,36 @@ bool bad_example() {
   }
   return true;
 }
+// returns true if successful
+bool stable_test() {
+  std::string json = "{"
+        "\"Image\":{"
+            "\"Width\":800,"
+            "\"Height\":600,"
+            "\"Title\":\"View from 15th Floor\","
+            "\"Thumbnail\":{"
+            "\"Url\":\"http://www.example.com/image/481989943\","
+            "\"Height\":125,"
+            "\"Width\":100"
+            "},"
+            "\"Animated\":false,"
+            "\"IDs\":[116,943.3,234,38793]"
+          "}"
+      "}";
+  simdjson::ParsedJson pj = simdjson::build_parsed_json(json);
+  std::ostringstream myStream;
+  if( ! pj.print_json(myStream) ) {
+    std::cout << "cannot print it out? " << std::endl;
+    return false;
+  }
+  std::string newjson = myStream.str();
+  if(json != newjson) {
+    std::cout << "serialized json differs!" << std::endl;
+    std::cout << json << std::endl;
+    std::cout << newjson << std::endl;
+  }
+  return newjson == json;
+}
 
 // returns true if successful
 bool navigate_test() {
@@ -295,6 +325,8 @@ bool skyprophet_test() {
 
 int main() {
   std::cout << "Running basic tests." << std::endl;
+  if(!stable_test())
+    return EXIT_FAILURE;
   if(!bad_example())
     return EXIT_FAILURE;
   if(!number_test_powers_of_two())