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      1 /*
      2  * Copyright (C) 2012 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
     14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
     15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
     17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
     23  * THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 
     28 #include "wtf/StringExtras.h"
     29 #include "wtf/text/CString.h"
     30 #include "wtf/text/WTFString.h"
     31 #include <gtest/gtest.h>
     32 #include <limits>
     33 
     34 namespace {
     35 
     36 template<typename IntegerType> struct PrintfFormatTrait { static const char format[]; };
     37 
     38 template<> struct PrintfFormatTrait<short> { static const char format[]; };
     39 const char PrintfFormatTrait<short>::format[] = "%hd";
     40 
     41 template<> struct PrintfFormatTrait<int> { static const char format[]; };
     42 const char PrintfFormatTrait<int>::format[] = "%d";
     43 
     44 template<> struct PrintfFormatTrait<long> { static const char format[]; };
     45 const char PrintfFormatTrait<long>::format[] = "%ld";
     46 
     47 template<> struct PrintfFormatTrait<long long> { static const char format[]; };
     48 #if OS(WIN)
     49 const char PrintfFormatTrait<long long>::format[] = "%I64i";
     50 #else
     51 const char PrintfFormatTrait<long long>::format[] = "%lli";
     52 #endif // OS(WIN)
     53 
     54 template<> struct PrintfFormatTrait<unsigned short> { static const char format[]; };
     55 const char PrintfFormatTrait<unsigned short>::format[] = "%hu";
     56 
     57 template<> struct PrintfFormatTrait<unsigned> { static const char format[]; };
     58 const char PrintfFormatTrait<unsigned>::format[] = "%u";
     59 
     60 template<> struct PrintfFormatTrait<unsigned long> { static const char format[]; };
     61 const char PrintfFormatTrait<unsigned long>::format[] = "%lu";
     62 
     63 template<> struct PrintfFormatTrait<unsigned long long> { static const char format[]; };
     64 #if OS(WIN)
     65 const char PrintfFormatTrait<unsigned long long>::format[] = "%I64u";
     66 #else
     67 const char PrintfFormatTrait<unsigned long long>::format[] = "%llu";
     68 #endif // OS(WIN)
     69 
     70 
     71 // FIXME: use snprintf from StringExtras.h
     72 template<typename IntegerType>
     73 void testBoundaries()
     74 {
     75     const unsigned bufferSize = 256;
     76     Vector<char, bufferSize> buffer;
     77     buffer.resize(bufferSize);
     78 
     79     const IntegerType min = std::numeric_limits<IntegerType>::min();
     80     CString minStringData = String::number(min).latin1();
     81     snprintf(buffer.data(), bufferSize, PrintfFormatTrait<IntegerType>::format, min);
     82     EXPECT_STREQ(buffer.data(), minStringData.data());
     83 
     84     const IntegerType max = std::numeric_limits<IntegerType>::max();
     85     CString maxStringData = String::number(max).latin1();
     86     snprintf(buffer.data(), bufferSize, PrintfFormatTrait<IntegerType>::format, max);
     87     EXPECT_STREQ(buffer.data(), maxStringData.data());
     88 }
     89 
     90 template<typename IntegerType>
     91 void testNumbers()
     92 {
     93     const unsigned bufferSize = 256;
     94     Vector<char, bufferSize> buffer;
     95     buffer.resize(bufferSize);
     96 
     97     for (int i = -100; i < 100; ++i) {
     98         const IntegerType number = static_cast<IntegerType>(i);
     99         CString numberStringData = String::number(number).latin1();
    100         snprintf(buffer.data(), bufferSize, PrintfFormatTrait<IntegerType>::format, number);
    101         EXPECT_STREQ(buffer.data(), numberStringData.data());
    102     }
    103 }
    104 
    105 TEST(StringExtraTest, IntegerToStringConversionSignedIntegerBoundaries)
    106 {
    107     testBoundaries<short>();
    108     testBoundaries<int>();
    109     testBoundaries<long>();
    110     testBoundaries<long long>();
    111 }
    112 
    113 TEST(StringExtraTest, IntegerToStringConversionSignedIntegerRegularNumbers)
    114 {
    115     testNumbers<short>();
    116     testNumbers<int>();
    117     testNumbers<long>();
    118     testNumbers<long long>();
    119 }
    120 
    121 TEST(StringExtraTest, IntegerToStringConversionUnsignedIntegerBoundaries)
    122 {
    123     testBoundaries<unsigned short>();
    124     testBoundaries<unsigned>();
    125     testBoundaries<unsigned long>();
    126     testBoundaries<unsigned long long>();
    127 }
    128 
    129 TEST(StringExtraTest, IntegerToStringConversionUnsignedIntegerRegularNumbers)
    130 {
    131     testNumbers<unsigned short>();
    132     testNumbers<unsigned>();
    133     testNumbers<unsigned long>();
    134     testNumbers<unsigned long long>();
    135 }
    136 
    137 } // namespace
    138