js/src/jsapi-tests/testPrintf.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  * vim: set ts=8 sts=2 et sw=2 tw=80:
   3  */
   4 /* This Source Code Form is subject to the terms of the Mozilla Public
   5  * License, v. 2.0. If a copy of the MPL was not distributed with this
   6  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   7
   8 #include "mozilla/IntegerPrintfMacros.h"
   9
  10 #include <cfloat>
  11 #include <stdarg.h>
  12
  13 #include "js/Printf.h"
  14
  15 #include "jsapi-tests/tests.h"
  16
  17 static bool MOZ_FORMAT_PRINTF(2, 3)
  18     print_one(const char* expect, const char* fmt, ...) {
  19   va_list ap;
  20
  21   va_start(ap, fmt);
  22   JS::UniqueChars output = JS_vsmprintf(fmt, ap);
  23   va_end(ap);
  24
  25   return output && !strcmp(output.get(), expect);
  26 }
  27
  28 static const char* zero() {
  29   // gcc 9 is altogether too clever about detecting that this will always
  30   // return nullptr. Do not replace 0x10 with 0x1; it will no longer work.
  31   return uintptr_t(&zero) == 0x10 ? "never happens" : nullptr;
  32 }
  33
  34 BEGIN_TEST(testPrintf) {
  35   CHECK(print_one("23", "%d", 23));
  36   CHECK(print_one("-1", "%d", -1));
  37   CHECK(print_one("23", "%u", 23u));
  38   CHECK(print_one("0x17", "0x%x", 23u));
  39   CHECK(print_one("0xFF", "0x%X", 255u));
  40   CHECK(print_one("027", "0%o", 23u));
  41   CHECK(print_one("-1", "%hd", (short)-1));
  42   // This could be expanded if need be, it's just convenient to do
  43   // it this way.
  44   if (sizeof(short) == 2) {
  45     CHECK(print_one("8000", "%hx", (unsigned short)0x8000));
  46   }
  47   CHECK(print_one("0xf0f0", "0x%lx", 0xf0f0ul));
  48   CHECK(print_one("0xF0F0", "0x%llX", 0xf0f0ull));
  49   CHECK(print_one("27270", "%zu", (size_t)27270));
  50   CHECK(print_one("27270", "%zu", (size_t)27270));
  51   CHECK(print_one("hello", "he%so", "ll"));
  52   CHECK(print_one("(null)", "%s", ::zero()));
  53   CHECK(print_one("0", "%p", (char*)0));
  54   CHECK(print_one("h", "%c", 'h'));
  55   CHECK(print_one("1.500000", "%f", 1.5f));
  56   CHECK(print_one("1.5", "%g", 1.5));
  57
  58   // Regression test for bug#1350097.  The bug was an assertion
  59   // failure caused by printing a very long floating point value.
  60   print_one("ignore", "%lf", DBL_MAX);
  61
  62   CHECK(print_one("2727", "%" PRIu32, (uint32_t)2727));
  63   CHECK(print_one("aa7", "%" PRIx32, (uint32_t)2727));
  64   CHECK(print_one("2727", "%" PRIu64, (uint64_t)2727));
  65   CHECK(print_one("aa7", "%" PRIx64, (uint64_t)2727));
  66
  67   return true;
  68 }
  69 END_TEST(testPrintf)