mirror of
https://github.com/php/php-src.git
synced 2026-04-28 18:53:33 +02:00
Alex Dowad
0b7986f976
I learned this trick for doing a faster bounds check with both upper and lower bounds by reading a disassembler listing of optimized code produced by GCC; instead of doing 2 compares to check the upper and the lower bound, add an immediate value to shift the range you are testing for to the far low or high end of the range of possible values for the type in question, and then a single compare will do. Intstead of compare + compare + AND, you just do ADD + compare. From microbenchmarking on my development PC, this makes strtoupper() about 10% faster on long strings (~10,000 bytes).
357 lines
4.5 KiB
PHP
357 lines
4.5 KiB
PHP
--TEST--
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Test strtolower() function
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--FILE--
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<?php
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echo "*** Testing strtolower() with 256 chars ***\n";
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for ($i=0; $i<=255; $i++){
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$char = chr($i);
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print(bin2hex($char))." => ".(bin2hex(strtolower("$char")))."\n";
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}
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echo "*** Testing strlower() with basic strings ***\n";
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$str = "Mary Had A liTTle LAmb and ShE loveD IT So\n";
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var_dump(strtolower($str));
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echo "\n*** Testing strtolower() with various strings ***";
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/* strings to pass strtolower() */
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$strings = array (
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"",
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"string",
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"stRINg0234",
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"1.233.344StrinG12333",
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"$$$$$$!!!!@@@@@@@ ABCDEF !!!***",
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"ABCD\0abcdABCD",
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TRUE,
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FALSE,
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/* Check for off-by-one errors in the SSE implementation */
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"AAAAAAAAAAAAAAAAAAAA",
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"ZZZZZZZZZZZZZZZZZZZZ",
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"@@@@@@@@@@@@@@@@@@@@",
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"[[[[[[[[[[[[[[[[[[[[",
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"abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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);
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$count = 0;
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/* loop through to check possible variations */
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foreach ($strings as $string) {
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echo "\n-- Iteration $count --\n";
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var_dump( strtolower($string) );
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$count++;
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}
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echo "\n*** Testing strtolower() with two different case strings ***\n";
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if (strtolower("HeLLo woRLd") === strtolower("hEllo WORLD"))
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echo "strings are same, with Case Insensitive\n";
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else
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echo "strings are not same\n";
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echo "*** Done ***";
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?>
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--EXPECTF--
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*** Testing strtolower() with 256 chars ***
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00 => 00
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01 => 01
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02 => 02
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03 => 03
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04 => 04
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05 => 05
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06 => 06
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07 => 07
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08 => 08
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09 => 09
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0a => 0a
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0b => 0b
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0c => 0c
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0d => 0d
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0e => 0e
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0f => 0f
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10 => 10
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11 => 11
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12 => 12
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13 => 13
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14 => 14
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15 => 15
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16 => 16
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17 => 17
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18 => 18
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19 => 19
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1a => 1a
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1b => 1b
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1c => 1c
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1d => 1d
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1e => 1e
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1f => 1f
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20 => 20
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21 => 21
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22 => 22
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23 => 23
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24 => 24
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25 => 25
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26 => 26
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27 => 27
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28 => 28
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29 => 29
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2a => 2a
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2b => 2b
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2c => 2c
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2d => 2d
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2e => 2e
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2f => 2f
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30 => 30
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31 => 31
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32 => 32
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33 => 33
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34 => 34
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35 => 35
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36 => 36
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37 => 37
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38 => 38
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39 => 39
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3a => 3a
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3b => 3b
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3c => 3c
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3d => 3d
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3e => 3e
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3f => 3f
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40 => 40
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41 => 61
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42 => 62
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43 => 63
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44 => 64
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45 => 65
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46 => 66
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47 => 67
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48 => 68
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49 => 69
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4a => 6a
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4b => 6b
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4c => 6c
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4d => 6d
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4e => 6e
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4f => 6f
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50 => 70
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51 => 71
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52 => 72
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53 => 73
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54 => 74
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55 => 75
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56 => 76
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57 => 77
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58 => 78
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59 => 79
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5a => 7a
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5b => 5b
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5c => 5c
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5d => 5d
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5e => 5e
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5f => 5f
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60 => 60
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61 => 61
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62 => 62
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63 => 63
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64 => 64
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65 => 65
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66 => 66
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67 => 67
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68 => 68
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69 => 69
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6a => 6a
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6b => 6b
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6c => 6c
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6d => 6d
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6e => 6e
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6f => 6f
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70 => 70
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71 => 71
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72 => 72
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73 => 73
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74 => 74
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75 => 75
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76 => 76
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77 => 77
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78 => 78
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79 => 79
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7a => 7a
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7b => 7b
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7c => 7c
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7d => 7d
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7e => 7e
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7f => 7f
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80 => 80
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81 => 81
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82 => 82
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83 => 83
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84 => 84
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85 => 85
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86 => 86
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87 => 87
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88 => 88
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89 => 89
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8a => 8a
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8b => 8b
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8c => 8c
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8d => 8d
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8e => 8e
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8f => 8f
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90 => 90
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91 => 91
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92 => 92
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93 => 93
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94 => 94
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95 => 95
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96 => 96
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97 => 97
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98 => 98
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99 => 99
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9a => 9a
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9b => 9b
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9c => 9c
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9d => 9d
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9e => 9e
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9f => 9f
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a0 => a0
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a1 => a1
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a2 => a2
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a3 => a3
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a4 => a4
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a5 => a5
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a6 => a6
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a7 => a7
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a8 => a8
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a9 => a9
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aa => aa
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ab => ab
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ac => ac
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ad => ad
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ae => ae
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af => af
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b0 => b0
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b1 => b1
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b2 => b2
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b3 => b3
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b4 => b4
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b5 => b5
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b6 => b6
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b7 => b7
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b8 => b8
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b9 => b9
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ba => ba
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bb => bb
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bc => bc
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bd => bd
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be => be
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bf => bf
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c0 => c0
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c1 => c1
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c2 => c2
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c3 => c3
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c4 => c4
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c5 => c5
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c6 => c6
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c7 => c7
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c8 => c8
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c9 => c9
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ca => ca
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cb => cb
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cc => cc
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cd => cd
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ce => ce
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cf => cf
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d0 => d0
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d1 => d1
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d2 => d2
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d3 => d3
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d4 => d4
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d5 => d5
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d6 => d6
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d7 => d7
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d8 => d8
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d9 => d9
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da => da
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db => db
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dc => dc
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dd => dd
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de => de
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df => df
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e0 => e0
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e1 => e1
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e2 => e2
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e3 => e3
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e4 => e4
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e5 => e5
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e6 => e6
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e7 => e7
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e8 => e8
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e9 => e9
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ea => ea
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eb => eb
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ec => ec
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ed => ed
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ee => ee
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ef => ef
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f0 => f0
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f1 => f1
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f2 => f2
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f3 => f3
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f4 => f4
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f5 => f5
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f6 => f6
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f7 => f7
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f8 => f8
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f9 => f9
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fa => fa
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fb => fb
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fc => fc
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fd => fd
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fe => fe
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ff => ff
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*** Testing strlower() with basic strings ***
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string(43) "mary had a little lamb and she loved it so
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"
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*** Testing strtolower() with various strings ***
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-- Iteration 0 --
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string(0) ""
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-- Iteration 1 --
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string(6) "string"
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-- Iteration 2 --
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string(10) "string0234"
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-- Iteration 3 --
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string(20) "1.233.344string12333"
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-- Iteration 4 --
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string(31) "$$$$$$!!!!@@@@@@@ abcdef !!!***"
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-- Iteration 5 --
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string(13) "abcd%0abcdabcd"
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-- Iteration 6 --
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string(1) "1"
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-- Iteration 7 --
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string(0) ""
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-- Iteration 8 --
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string(20) "aaaaaaaaaaaaaaaaaaaa"
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-- Iteration 9 --
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string(20) "zzzzzzzzzzzzzzzzzzzz"
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-- Iteration 10 --
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string(20) "@@@@@@@@@@@@@@@@@@@@"
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-- Iteration 11 --
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string(20) "[[[[[[[[[[[[[[[[[[[["
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-- Iteration 12 --
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string(62) "abcdefghijklmnopqrstuvwxyz0123456789abcdefghijklmnopqrstuvwxyz"
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*** Testing strtolower() with two different case strings ***
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strings are same, with Case Insensitive
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*** Done ***
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