testPrintf.cpp (2314B)
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)