base/strings/string_number_conversions_unittest.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include <errno.h>
   6 #include <stdint.h>
   7 #include <stdio.h>
   8
   9 #include <cmath>
  10 #include <limits>
  11
  12 #include "base/format_macros.h"
  13 #include "base/strings/string_number_conversions.h"
  14 #include "base/strings/stringprintf.h"
  15 #include "base/strings/utf_string_conversions.h"
  16 #include "testing/gtest/include/gtest/gtest.h"
  17
  18 namespace base {
  19
  20 namespace {
  21
  22 template <typename INT>
  23 struct IntToStringTest {
  24   INT num;
  25   const char* sexpected;
  26   const char* uexpected;
  27 };
  28
  29 }  // namespace
  30
  31 TEST(StringNumberConversionsTest, IntToString) {
  32   static const IntToStringTest<int> int_tests[] = {
  33       { 0, "0", "0" },
  34       { -1, "-1", "4294967295" },
  35       { std::numeric_limits<int>::max(), "2147483647", "2147483647" },
  36       { std::numeric_limits<int>::min(), "-2147483648", "2147483648" },
  37   };
  38   static const IntToStringTest<int64> int64_tests[] = {
  39       { 0, "0", "0" },
  40       { -1, "-1", "18446744073709551615" },
  41       { std::numeric_limits<int64>::max(),
  42         "9223372036854775807",
  43         "9223372036854775807", },
  44       { std::numeric_limits<int64>::min(),
  45         "-9223372036854775808",
  46         "9223372036854775808" },
  47   };
  48
  49   for (size_t i = 0; i < arraysize(int_tests); ++i) {
  50     const IntToStringTest<int>* test = &int_tests[i];
  51     EXPECT_EQ(IntToString(test->num), test->sexpected);
  52     EXPECT_EQ(IntToString16(test->num), UTF8ToUTF16(test->sexpected));
  53     EXPECT_EQ(UintToString(test->num), test->uexpected);
  54     EXPECT_EQ(UintToString16(test->num), UTF8ToUTF16(test->uexpected));
  55   }
  56   for (size_t i = 0; i < arraysize(int64_tests); ++i) {
  57     const IntToStringTest<int64>* test = &int64_tests[i];
  58     EXPECT_EQ(Int64ToString(test->num), test->sexpected);
  59     EXPECT_EQ(Int64ToString16(test->num), UTF8ToUTF16(test->sexpected));
  60     EXPECT_EQ(Uint64ToString(test->num), test->uexpected);
  61     EXPECT_EQ(Uint64ToString16(test->num), UTF8ToUTF16(test->uexpected));
  62   }
  63 }
  64
  65 TEST(StringNumberConversionsTest, Uint64ToString) {
  66   static const struct {
  67     uint64 input;
  68     std::string output;
  69   } cases[] = {
  70     {0, "0"},
  71     {42, "42"},
  72     {INT_MAX, "2147483647"},
  73     {kuint64max, "18446744073709551615"},
  74   };
  75
  76   for (size_t i = 0; i < arraysize(cases); ++i)
  77     EXPECT_EQ(cases[i].output, Uint64ToString(cases[i].input));
  78 }
  79
  80 TEST(StringNumberConversionsTest, SizeTToString) {
  81   size_t size_t_max = std::numeric_limits<size_t>::max();
  82   std::string size_t_max_string = StringPrintf("%" PRIuS, size_t_max);
  83
  84   static const struct {
  85     size_t input;
  86     std::string output;
  87   } cases[] = {
  88     {0, "0"},
  89     {9, "9"},
  90     {42, "42"},
  91     {INT_MAX, "2147483647"},
  92     {2147483648U, "2147483648"},
  93 #if SIZE_MAX > 4294967295U
  94     {99999999999U, "99999999999"},
  95 #endif
  96     {size_t_max, size_t_max_string},
  97   };
  98
  99   for (size_t i = 0; i < arraysize(cases); ++i)
 100     EXPECT_EQ(cases[i].output, Uint64ToString(cases[i].input));
 101 }
 102
 103 TEST(StringNumberConversionsTest, StringToInt) {
 104   static const struct {
 105     std::string input;
 106     int output;
 107     bool success;
 108   } cases[] = {
 109     {"0", 0, true},
 110     {"42", 42, true},
 111     {"42\x99", 42, false},
 112     {"\x99" "42\x99", 0, false},
 113     {"-2147483648", INT_MIN, true},
 114     {"2147483647", INT_MAX, true},
 115     {"", 0, false},
 116     {" 42", 42, false},
 117     {"42 ", 42, false},
 118     {"\t\n\v\f\r 42", 42, false},
 119     {"blah42", 0, false},
 120     {"42blah", 42, false},
 121     {"blah42blah", 0, false},
 122     {"-273.15", -273, false},
 123     {"+98.6", 98, false},
 124     {"--123", 0, false},
 125     {"++123", 0, false},
 126     {"-+123", 0, false},
 127     {"+-123", 0, false},
 128     {"-", 0, false},
 129     {"-2147483649", INT_MIN, false},
 130     {"-99999999999", INT_MIN, false},
 131     {"2147483648", INT_MAX, false},
 132     {"99999999999", INT_MAX, false},
 133   };
 134
 135   for (size_t i = 0; i < arraysize(cases); ++i) {
 136     int output = 0;
 137     EXPECT_EQ(cases[i].success, StringToInt(cases[i].input, &output));
 138     EXPECT_EQ(cases[i].output, output);
 139
 140     string16 utf16_input = UTF8ToUTF16(cases[i].input);
 141     output = 0;
 142     EXPECT_EQ(cases[i].success, StringToInt(utf16_input, &output));
 143     EXPECT_EQ(cases[i].output, output);
 144   }
 145
 146   // One additional test to verify that conversion of numbers in strings with
 147   // embedded NUL characters.  The NUL and extra data after it should be
 148   // interpreted as junk after the number.
 149   const char input[] = "6\06";
 150   std::string input_string(input, arraysize(input) - 1);
 151   int output;
 152   EXPECT_FALSE(StringToInt(input_string, &output));
 153   EXPECT_EQ(6, output);
 154
 155   string16 utf16_input = UTF8ToUTF16(input_string);
 156   output = 0;
 157   EXPECT_FALSE(StringToInt(utf16_input, &output));
 158   EXPECT_EQ(6, output);
 159
 160   output = 0;
 161   const char16 negative_wide_input[] = { 0xFF4D, '4', '2', 0};
 162   EXPECT_FALSE(StringToInt(string16(negative_wide_input), &output));
 163   EXPECT_EQ(0, output);
 164 }
 165
 166 TEST(StringNumberConversionsTest, StringToUint) {
 167   static const struct {
 168     std::string input;
 169     unsigned output;
 170     bool success;
 171   } cases[] = {
 172     {"0", 0, true},
 173     {"42", 42, true},
 174     {"42\x99", 42, false},
 175     {"\x99" "42\x99", 0, false},
 176     {"-2147483648", 0, false},
 177     {"2147483647", INT_MAX, true},
 178     {"", 0, false},
 179     {" 42", 42, false},
 180     {"42 ", 42, false},
 181     {"\t\n\v\f\r 42", 42, false},
 182     {"blah42", 0, false},
 183     {"42blah", 42, false},
 184     {"blah42blah", 0, false},
 185     {"-273.15", 0, false},
 186     {"+98.6", 98, false},
 187     {"--123", 0, false},
 188     {"++123", 0, false},
 189     {"-+123", 0, false},
 190     {"+-123", 0, false},
 191     {"-", 0, false},
 192     {"-2147483649", 0, false},
 193     {"-99999999999", 0, false},
 194     {"4294967295", UINT_MAX, true},
 195     {"4294967296", UINT_MAX, false},
 196     {"99999999999", UINT_MAX, false},
 197   };
 198
 199   for (size_t i = 0; i < arraysize(cases); ++i) {
 200     unsigned output = 0;
 201     EXPECT_EQ(cases[i].success, StringToUint(cases[i].input, &output));
 202     EXPECT_EQ(cases[i].output, output);
 203
 204     string16 utf16_input = UTF8ToUTF16(cases[i].input);
 205     output = 0;
 206     EXPECT_EQ(cases[i].success, StringToUint(utf16_input, &output));
 207     EXPECT_EQ(cases[i].output, output);
 208   }
 209
 210   // One additional test to verify that conversion of numbers in strings with
 211   // embedded NUL characters.  The NUL and extra data after it should be
 212   // interpreted as junk after the number.
 213   const char input[] = "6\06";
 214   std::string input_string(input, arraysize(input) - 1);
 215   unsigned output;
 216   EXPECT_FALSE(StringToUint(input_string, &output));
 217   EXPECT_EQ(6U, output);
 218
 219   string16 utf16_input = UTF8ToUTF16(input_string);
 220   output = 0;
 221   EXPECT_FALSE(StringToUint(utf16_input, &output));
 222   EXPECT_EQ(6U, output);
 223
 224   output = 0;
 225   const char16 negative_wide_input[] = { 0xFF4D, '4', '2', 0};
 226   EXPECT_FALSE(StringToUint(string16(negative_wide_input), &output));
 227   EXPECT_EQ(0U, output);
 228 }
 229
 230 TEST(StringNumberConversionsTest, StringToInt64) {
 231   static const struct {
 232     std::string input;
 233     int64 output;
 234     bool success;
 235   } cases[] = {
 236     {"0", 0, true},
 237     {"42", 42, true},
 238     {"-2147483648", INT_MIN, true},
 239     {"2147483647", INT_MAX, true},
 240     {"-2147483649", GG_INT64_C(-2147483649), true},
 241     {"-99999999999", GG_INT64_C(-99999999999), true},
 242     {"2147483648", GG_INT64_C(2147483648), true},
 243     {"99999999999", GG_INT64_C(99999999999), true},
 244     {"9223372036854775807", kint64max, true},
 245     {"-9223372036854775808", kint64min, true},
 246     {"09", 9, true},
 247     {"-09", -9, true},
 248     {"", 0, false},
 249     {" 42", 42, false},
 250     {"42 ", 42, false},
 251     {"0x42", 0, false},
 252     {"\t\n\v\f\r 42", 42, false},
 253     {"blah42", 0, false},
 254     {"42blah", 42, false},
 255     {"blah42blah", 0, false},
 256     {"-273.15", -273, false},
 257     {"+98.6", 98, false},
 258     {"--123", 0, false},
 259     {"++123", 0, false},
 260     {"-+123", 0, false},
 261     {"+-123", 0, false},
 262     {"-", 0, false},
 263     {"-9223372036854775809", kint64min, false},
 264     {"-99999999999999999999", kint64min, false},
 265     {"9223372036854775808", kint64max, false},
 266     {"99999999999999999999", kint64max, false},
 267   };
 268
 269   for (size_t i = 0; i < arraysize(cases); ++i) {
 270     int64 output = 0;
 271     EXPECT_EQ(cases[i].success, StringToInt64(cases[i].input, &output));
 272     EXPECT_EQ(cases[i].output, output);
 273
 274     string16 utf16_input = UTF8ToUTF16(cases[i].input);
 275     output = 0;
 276     EXPECT_EQ(cases[i].success, StringToInt64(utf16_input, &output));
 277     EXPECT_EQ(cases[i].output, output);
 278   }
 279
 280   // One additional test to verify that conversion of numbers in strings with
 281   // embedded NUL characters.  The NUL and extra data after it should be
 282   // interpreted as junk after the number.
 283   const char input[] = "6\06";
 284   std::string input_string(input, arraysize(input) - 1);
 285   int64 output;
 286   EXPECT_FALSE(StringToInt64(input_string, &output));
 287   EXPECT_EQ(6, output);
 288
 289   string16 utf16_input = UTF8ToUTF16(input_string);
 290   output = 0;
 291   EXPECT_FALSE(StringToInt64(utf16_input, &output));
 292   EXPECT_EQ(6, output);
 293 }
 294
 295 TEST(StringNumberConversionsTest, StringToUint64) {
 296   static const struct {
 297     std::string input;
 298     uint64 output;
 299     bool success;
 300   } cases[] = {
 301     {"0", 0, true},
 302     {"42", 42, true},
 303     {"-2147483648", 0, false},
 304     {"2147483647", INT_MAX, true},
 305     {"-2147483649", 0, false},
 306     {"-99999999999", 0, false},
 307     {"2147483648", GG_UINT64_C(2147483648), true},
 308     {"99999999999", GG_UINT64_C(99999999999), true},
 309     {"9223372036854775807", kint64max, true},
 310     {"-9223372036854775808", 0, false},
 311     {"09", 9, true},
 312     {"-09", 0, false},
 313     {"", 0, false},
 314     {" 42", 42, false},
 315     {"42 ", 42, false},
 316     {"0x42", 0, false},
 317     {"\t\n\v\f\r 42", 42, false},
 318     {"blah42", 0, false},
 319     {"42blah", 42, false},
 320     {"blah42blah", 0, false},
 321     {"-273.15", 0, false},
 322     {"+98.6", 98, false},
 323     {"--123", 0, false},
 324     {"++123", 0, false},
 325     {"-+123", 0, false},
 326     {"+-123", 0, false},
 327     {"-", 0, false},
 328     {"-9223372036854775809", 0, false},
 329     {"-99999999999999999999", 0, false},
 330     {"9223372036854775808", GG_UINT64_C(9223372036854775808), true},
 331     {"99999999999999999999", kuint64max, false},
 332     {"18446744073709551615", kuint64max, true},
 333     {"18446744073709551616", kuint64max, false},
 334   };
 335
 336   for (size_t i = 0; i < arraysize(cases); ++i) {
 337     uint64 output = 0;
 338     EXPECT_EQ(cases[i].success, StringToUint64(cases[i].input, &output));
 339     EXPECT_EQ(cases[i].output, output);
 340
 341     string16 utf16_input = UTF8ToUTF16(cases[i].input);
 342     output = 0;
 343     EXPECT_EQ(cases[i].success, StringToUint64(utf16_input, &output));
 344     EXPECT_EQ(cases[i].output, output);
 345   }
 346
 347   // One additional test to verify that conversion of numbers in strings with
 348   // embedded NUL characters.  The NUL and extra data after it should be
 349   // interpreted as junk after the number.
 350   const char input[] = "6\06";
 351   std::string input_string(input, arraysize(input) - 1);
 352   uint64 output;
 353   EXPECT_FALSE(StringToUint64(input_string, &output));
 354   EXPECT_EQ(6U, output);
 355
 356   string16 utf16_input = UTF8ToUTF16(input_string);
 357   output = 0;
 358   EXPECT_FALSE(StringToUint64(utf16_input, &output));
 359   EXPECT_EQ(6U, output);
 360 }
 361
 362 TEST(StringNumberConversionsTest, StringToSizeT) {
 363   size_t size_t_max = std::numeric_limits<size_t>::max();
 364   std::string size_t_max_string = StringPrintf("%" PRIuS, size_t_max);
 365
 366   static const struct {
 367     std::string input;
 368     size_t output;
 369     bool success;
 370   } cases[] = {
 371     {"0", 0, true},
 372     {"42", 42, true},
 373     {"-2147483648", 0, false},
 374     {"2147483647", INT_MAX, true},
 375     {"-2147483649", 0, false},
 376     {"-99999999999", 0, false},
 377     {"2147483648", 2147483648U, true},
 378 #if SIZE_MAX > 4294967295U
 379     {"99999999999", 99999999999U, true},
 380 #endif
 381     {"-9223372036854775808", 0, false},
 382     {"09", 9, true},
 383     {"-09", 0, false},
 384     {"", 0, false},
 385     {" 42", 42, false},
 386     {"42 ", 42, false},
 387     {"0x42", 0, false},
 388     {"\t\n\v\f\r 42", 42, false},
 389     {"blah42", 0, false},
 390     {"42blah", 42, false},
 391     {"blah42blah", 0, false},
 392     {"-273.15", 0, false},
 393     {"+98.6", 98, false},
 394     {"--123", 0, false},
 395     {"++123", 0, false},
 396     {"-+123", 0, false},
 397     {"+-123", 0, false},
 398     {"-", 0, false},
 399     {"-9223372036854775809", 0, false},
 400     {"-99999999999999999999", 0, false},
 401     {"999999999999999999999999", size_t_max, false},
 402     {size_t_max_string, size_t_max, true},
 403   };
 404
 405   for (size_t i = 0; i < arraysize(cases); ++i) {
 406     size_t output = 0;
 407     EXPECT_EQ(cases[i].success, StringToSizeT(cases[i].input, &output));
 408     EXPECT_EQ(cases[i].output, output);
 409
 410     string16 utf16_input = UTF8ToUTF16(cases[i].input);
 411     output = 0;
 412     EXPECT_EQ(cases[i].success, StringToSizeT(utf16_input, &output));
 413     EXPECT_EQ(cases[i].output, output);
 414   }
 415
 416   // One additional test to verify that conversion of numbers in strings with
 417   // embedded NUL characters.  The NUL and extra data after it should be
 418   // interpreted as junk after the number.
 419   const char input[] = "6\06";
 420   std::string input_string(input, arraysize(input) - 1);
 421   size_t output;
 422   EXPECT_FALSE(StringToSizeT(input_string, &output));
 423   EXPECT_EQ(6U, output);
 424
 425   string16 utf16_input = UTF8ToUTF16(input_string);
 426   output = 0;
 427   EXPECT_FALSE(StringToSizeT(utf16_input, &output));
 428   EXPECT_EQ(6U, output);
 429 }
 430
 431 TEST(StringNumberConversionsTest, HexStringToInt) {
 432   static const struct {
 433     std::string input;
 434     int64 output;
 435     bool success;
 436   } cases[] = {
 437     {"0", 0, true},
 438     {"42", 66, true},
 439     {"-42", -66, true},
 440     {"+42", 66, true},
 441     {"7fffffff", INT_MAX, true},
 442     {"-80000000", INT_MIN, true},
 443     {"80000000", INT_MAX, false},  // Overflow test.
 444     {"-80000001", INT_MIN, false},  // Underflow test.
 445     {"0x42", 66, true},
 446     {"-0x42", -66, true},
 447     {"+0x42", 66, true},
 448     {"0x7fffffff", INT_MAX, true},
 449     {"-0x80000000", INT_MIN, true},
 450     {"-80000000", INT_MIN, true},
 451     {"80000000", INT_MAX, false},  // Overflow test.
 452     {"-80000001", INT_MIN, false},  // Underflow test.
 453     {"0x0f", 15, true},
 454     {"0f", 15, true},
 455     {" 45", 0x45, false},
 456     {"\t\n\v\f\r 0x45", 0x45, false},
 457     {" 45", 0x45, false},
 458     {"45 ", 0x45, false},
 459     {"45:", 0x45, false},
 460     {"efgh", 0xef, false},
 461     {"0xefgh", 0xef, false},
 462     {"hgfe", 0, false},
 463     {"-", 0, false},
 464     {"", 0, false},
 465     {"0x", 0, false},
 466   };
 467
 468   for (size_t i = 0; i < arraysize(cases); ++i) {
 469     int output = 0;
 470     EXPECT_EQ(cases[i].success, HexStringToInt(cases[i].input, &output));
 471     EXPECT_EQ(cases[i].output, output);
 472   }
 473   // One additional test to verify that conversion of numbers in strings with
 474   // embedded NUL characters.  The NUL and extra data after it should be
 475   // interpreted as junk after the number.
 476   const char input[] = "0xc0ffee\0" "9";
 477   std::string input_string(input, arraysize(input) - 1);
 478   int output;
 479   EXPECT_FALSE(HexStringToInt(input_string, &output));
 480   EXPECT_EQ(0xc0ffee, output);
 481 }
 482
 483 TEST(StringNumberConversionsTest, HexStringToUInt) {
 484   static const struct {
 485     std::string input;
 486     uint32 output;
 487     bool success;
 488   } cases[] = {
 489     {"0", 0, true},
 490     {"42", 0x42, true},
 491     {"-42", 0, false},
 492     {"+42", 0x42, true},
 493     {"7fffffff", INT_MAX, true},
 494     {"-80000000", 0, false},
 495     {"ffffffff", 0xffffffff, true},
 496     {"DeadBeef", 0xdeadbeef, true},
 497     {"0x42", 0x42, true},
 498     {"-0x42", 0, false},
 499     {"+0x42", 0x42, true},
 500     {"0x7fffffff", INT_MAX, true},
 501     {"-0x80000000", 0, false},
 502     {"0xffffffff", kuint32max, true},
 503     {"0XDeadBeef", 0xdeadbeef, true},
 504     {"0x7fffffffffffffff", kuint32max, false},  // Overflow test.
 505     {"-0x8000000000000000", 0, false},
 506     {"0x8000000000000000", kuint32max, false},  // Overflow test.
 507     {"-0x8000000000000001", 0, false},
 508     {"0xFFFFFFFFFFFFFFFF", kuint32max, false},  // Overflow test.
 509     {"FFFFFFFFFFFFFFFF", kuint32max, false},  // Overflow test.
 510     {"0x0000000000000000", 0, true},
 511     {"0000000000000000", 0, true},
 512     {"1FFFFFFFFFFFFFFFF", kuint32max, false}, // Overflow test.
 513     {"0x0f", 0x0f, true},
 514     {"0f", 0x0f, true},
 515     {" 45", 0x45, false},
 516     {"\t\n\v\f\r 0x45", 0x45, false},
 517     {" 45", 0x45, false},
 518     {"45 ", 0x45, false},
 519     {"45:", 0x45, false},
 520     {"efgh", 0xef, false},
 521     {"0xefgh", 0xef, false},
 522     {"hgfe", 0, false},
 523     {"-", 0, false},
 524     {"", 0, false},
 525     {"0x", 0, false},
 526   };
 527
 528   for (size_t i = 0; i < arraysize(cases); ++i) {
 529     uint32 output = 0;
 530     EXPECT_EQ(cases[i].success, HexStringToUInt(cases[i].input, &output));
 531     EXPECT_EQ(cases[i].output, output);
 532   }
 533   // One additional test to verify that conversion of numbers in strings with
 534   // embedded NUL characters.  The NUL and extra data after it should be
 535   // interpreted as junk after the number.
 536   const char input[] = "0xc0ffee\0" "9";
 537   std::string input_string(input, arraysize(input) - 1);
 538   uint32 output;
 539   EXPECT_FALSE(HexStringToUInt(input_string, &output));
 540   EXPECT_EQ(0xc0ffeeU, output);
 541 }
 542
 543 TEST(StringNumberConversionsTest, HexStringToInt64) {
 544   static const struct {
 545     std::string input;
 546     int64 output;
 547     bool success;
 548   } cases[] = {
 549     {"0", 0, true},
 550     {"42", 66, true},
 551     {"-42", -66, true},
 552     {"+42", 66, true},
 553     {"40acd88557b", GG_INT64_C(4444444448123), true},
 554     {"7fffffff", INT_MAX, true},
 555     {"-80000000", INT_MIN, true},
 556     {"ffffffff", 0xffffffff, true},
 557     {"DeadBeef", 0xdeadbeef, true},
 558     {"0x42", 66, true},
 559     {"-0x42", -66, true},
 560     {"+0x42", 66, true},
 561     {"0x40acd88557b", GG_INT64_C(4444444448123), true},
 562     {"0x7fffffff", INT_MAX, true},
 563     {"-0x80000000", INT_MIN, true},
 564     {"0xffffffff", 0xffffffff, true},
 565     {"0XDeadBeef", 0xdeadbeef, true},
 566     {"0x7fffffffffffffff", kint64max, true},
 567     {"-0x8000000000000000", kint64min, true},
 568     {"0x8000000000000000", kint64max, false},  // Overflow test.
 569     {"-0x8000000000000001", kint64min, false},  // Underflow test.
 570     {"0x0f", 15, true},
 571     {"0f", 15, true},
 572     {" 45", 0x45, false},
 573     {"\t\n\v\f\r 0x45", 0x45, false},
 574     {" 45", 0x45, false},
 575     {"45 ", 0x45, false},
 576     {"45:", 0x45, false},
 577     {"efgh", 0xef, false},
 578     {"0xefgh", 0xef, false},
 579     {"hgfe", 0, false},
 580     {"-", 0, false},
 581     {"", 0, false},
 582     {"0x", 0, false},
 583   };
 584
 585   for (size_t i = 0; i < arraysize(cases); ++i) {
 586     int64 output = 0;
 587     EXPECT_EQ(cases[i].success, HexStringToInt64(cases[i].input, &output));
 588     EXPECT_EQ(cases[i].output, output);
 589   }
 590   // One additional test to verify that conversion of numbers in strings with
 591   // embedded NUL characters.  The NUL and extra data after it should be
 592   // interpreted as junk after the number.
 593   const char input[] = "0xc0ffee\0" "9";
 594   std::string input_string(input, arraysize(input) - 1);
 595   int64 output;
 596   EXPECT_FALSE(HexStringToInt64(input_string, &output));
 597   EXPECT_EQ(0xc0ffee, output);
 598 }
 599
 600 TEST(StringNumberConversionsTest, HexStringToUInt64) {
 601   static const struct {
 602     std::string input;
 603     uint64 output;
 604     bool success;
 605   } cases[] = {
 606     {"0", 0, true},
 607     {"42", 66, true},
 608     {"-42", 0, false},
 609     {"+42", 66, true},
 610     {"40acd88557b", GG_INT64_C(4444444448123), true},
 611     {"7fffffff", INT_MAX, true},
 612     {"-80000000", 0, false},
 613     {"ffffffff", 0xffffffff, true},
 614     {"DeadBeef", 0xdeadbeef, true},
 615     {"0x42", 66, true},
 616     {"-0x42", 0, false},
 617     {"+0x42", 66, true},
 618     {"0x40acd88557b", GG_INT64_C(4444444448123), true},
 619     {"0x7fffffff", INT_MAX, true},
 620     {"-0x80000000", 0, false},
 621     {"0xffffffff", 0xffffffff, true},
 622     {"0XDeadBeef", 0xdeadbeef, true},
 623     {"0x7fffffffffffffff", kint64max, true},
 624     {"-0x8000000000000000", 0, false},
 625     {"0x8000000000000000", GG_UINT64_C(0x8000000000000000), true},
 626     {"-0x8000000000000001", 0, false},
 627     {"0xFFFFFFFFFFFFFFFF", kuint64max, true},
 628     {"FFFFFFFFFFFFFFFF", kuint64max, true},
 629     {"0x0000000000000000", 0, true},
 630     {"0000000000000000", 0, true},
 631     {"1FFFFFFFFFFFFFFFF", kuint64max, false}, // Overflow test.
 632     {"0x0f", 15, true},
 633     {"0f", 15, true},
 634     {" 45", 0x45, false},
 635     {"\t\n\v\f\r 0x45", 0x45, false},
 636     {" 45", 0x45, false},
 637     {"45 ", 0x45, false},
 638     {"45:", 0x45, false},
 639     {"efgh", 0xef, false},
 640     {"0xefgh", 0xef, false},
 641     {"hgfe", 0, false},
 642     {"-", 0, false},
 643     {"", 0, false},
 644     {"0x", 0, false},
 645   };
 646
 647   for (size_t i = 0; i < arraysize(cases); ++i) {
 648     uint64 output = 0;
 649     EXPECT_EQ(cases[i].success, HexStringToUInt64(cases[i].input, &output));
 650     EXPECT_EQ(cases[i].output, output);
 651   }
 652   // One additional test to verify that conversion of numbers in strings with
 653   // embedded NUL characters.  The NUL and extra data after it should be
 654   // interpreted as junk after the number.
 655   const char input[] = "0xc0ffee\0" "9";
 656   std::string input_string(input, arraysize(input) - 1);
 657   uint64 output;
 658   EXPECT_FALSE(HexStringToUInt64(input_string, &output));
 659   EXPECT_EQ(0xc0ffeeU, output);
 660 }
 661
 662 TEST(StringNumberConversionsTest, HexStringToBytes) {
 663   static const struct {
 664     const std::string input;
 665     const char* output;
 666     size_t output_len;
 667     bool success;
 668   } cases[] = {
 669     {"0", "", 0, false},  // odd number of characters fails
 670     {"00", "\0", 1, true},
 671     {"42", "\x42", 1, true},
 672     {"-42", "", 0, false},  // any non-hex value fails
 673     {"+42", "", 0, false},
 674     {"7fffffff", "\x7f\xff\xff\xff", 4, true},
 675     {"80000000", "\x80\0\0\0", 4, true},
 676     {"deadbeef", "\xde\xad\xbe\xef", 4, true},
 677     {"DeadBeef", "\xde\xad\xbe\xef", 4, true},
 678     {"0x42", "", 0, false},  // leading 0x fails (x is not hex)
 679     {"0f", "\xf", 1, true},
 680     {"45  ", "\x45", 1, false},
 681     {"efgh", "\xef", 1, false},
 682     {"", "", 0, false},
 683     {"0123456789ABCDEF", "\x01\x23\x45\x67\x89\xAB\xCD\xEF", 8, true},
 684     {"0123456789ABCDEF012345",
 685      "\x01\x23\x45\x67\x89\xAB\xCD\xEF\x01\x23\x45", 11, true},
 686   };
 687
 688
 689   for (size_t i = 0; i < arraysize(cases); ++i) {
 690     std::vector<uint8> output;
 691     std::vector<uint8> compare;
 692     EXPECT_EQ(cases[i].success, HexStringToBytes(cases[i].input, &output)) <<
 693         i << ": " << cases[i].input;
 694     for (size_t j = 0; j < cases[i].output_len; ++j)
 695       compare.push_back(static_cast<uint8>(cases[i].output[j]));
 696     ASSERT_EQ(output.size(), compare.size()) << i << ": " << cases[i].input;
 697     EXPECT_TRUE(std::equal(output.begin(), output.end(), compare.begin())) <<
 698         i << ": " << cases[i].input;
 699   }
 700 }
 701
 702 TEST(StringNumberConversionsTest, StringToDouble) {
 703   static const struct {
 704     std::string input;
 705     double output;
 706     bool success;
 707   } cases[] = {
 708     {"0", 0.0, true},
 709     {"42", 42.0, true},
 710     {"-42", -42.0, true},
 711     {"123.45", 123.45, true},
 712     {"-123.45", -123.45, true},
 713     {"+123.45", 123.45, true},
 714     {"2.99792458e8", 299792458.0, true},
 715     {"149597870.691E+3", 149597870691.0, true},
 716     {"6.", 6.0, true},
 717     {"9e99999999999999999999", HUGE_VAL, false},
 718     {"-9e99999999999999999999", -HUGE_VAL, false},
 719     {"1e-2", 0.01, true},
 720     {"42 ", 42.0, false},
 721     {" 1e-2", 0.01, false},
 722     {"1e-2 ", 0.01, false},
 723     {"-1E-7", -0.0000001, true},
 724     {"01e02", 100, true},
 725     {"2.3e15", 2.3e15, true},
 726     {"\t\n\v\f\r -123.45e2", -12345.0, false},
 727     {"+123 e4", 123.0, false},
 728     {"123e ", 123.0, false},
 729     {"123e", 123.0, false},
 730     {" 2.99", 2.99, false},
 731     {"1e3.4", 1000.0, false},
 732     {"nothing", 0.0, false},
 733     {"-", 0.0, false},
 734     {"+", 0.0, false},
 735     {"", 0.0, false},
 736   };
 737
 738   for (size_t i = 0; i < arraysize(cases); ++i) {
 739     double output;
 740     errno = 1;
 741     EXPECT_EQ(cases[i].success, StringToDouble(cases[i].input, &output));
 742     if (cases[i].success)
 743       EXPECT_EQ(1, errno) << i;  // confirm that errno is unchanged.
 744     EXPECT_DOUBLE_EQ(cases[i].output, output);
 745   }
 746
 747   // One additional test to verify that conversion of numbers in strings with
 748   // embedded NUL characters.  The NUL and extra data after it should be
 749   // interpreted as junk after the number.
 750   const char input[] = "3.14\0" "159";
 751   std::string input_string(input, arraysize(input) - 1);
 752   double output;
 753   EXPECT_FALSE(StringToDouble(input_string, &output));
 754   EXPECT_DOUBLE_EQ(3.14, output);
 755 }
 756
 757 TEST(StringNumberConversionsTest, DoubleToString) {
 758   static const struct {
 759     double input;
 760     const char* expected;
 761   } cases[] = {
 762     {0.0, "0"},
 763     {1.25, "1.25"},
 764     {1.33518e+012, "1.33518e+12"},
 765     {1.33489e+012, "1.33489e+12"},
 766     {1.33505e+012, "1.33505e+12"},
 767     {1.33545e+009, "1335450000"},
 768     {1.33503e+009, "1335030000"},
 769   };
 770
 771   for (size_t i = 0; i < arraysize(cases); ++i) {
 772     EXPECT_EQ(cases[i].expected, DoubleToString(cases[i].input));
 773   }
 774
 775   // The following two values were seen in crashes in the wild.
 776   const char input_bytes[8] = {0, 0, 0, 0, '\xee', '\x6d', '\x73', '\x42'};
 777   double input = 0;
 778   memcpy(&input, input_bytes, arraysize(input_bytes));
 779   EXPECT_EQ("1335179083776", DoubleToString(input));
 780   const char input_bytes2[8] =
 781       {0, 0, 0, '\xa0', '\xda', '\x6c', '\x73', '\x42'};
 782   input = 0;
 783   memcpy(&input, input_bytes2, arraysize(input_bytes2));
 784   EXPECT_EQ("1334890332160", DoubleToString(input));
 785 }
 786
 787 TEST(StringNumberConversionsTest, HexEncode) {
 788   std::string hex(HexEncode(NULL, 0));
 789   EXPECT_EQ(hex.length(), 0U);
 790   unsigned char bytes[] = {0x01, 0xff, 0x02, 0xfe, 0x03, 0x80, 0x81};
 791   hex = HexEncode(bytes, sizeof(bytes));
 792   EXPECT_EQ(hex.compare("01FF02FE038081"), 0);
 793 }
 794
 795 }  // namespace base