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annotate runtime/internal/switch.d @ 650:aa6a0b7968f7

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Added test case for bug #100 Removed dubious check for not emitting static private global in other modules without access. This should be handled properly somewhere else, it's causing unresolved global errors for stuff that should work (in MiniD)
author Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
date Sun, 05 Oct 2008 17:28:15 +0200
parents 44f08170f4ef
children
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443
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1 /*
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2 * Copyright (C) 2004-2007 by Digital Mars, www.digitalmars.com
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3 * Written by Walter Bright
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4 *
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5 * This software is provided 'as-is', without any express or implied
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6 * warranty. In no event will the authors be held liable for any damages
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7 * arising from the use of this software.
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8 *
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9 * Permission is granted to anyone to use this software for any purpose,
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10 * including commercial applications, and to alter it and redistribute it
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11 * freely, in both source and binary form, subject to the following
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12 * restrictions:
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13 *
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14 * o The origin of this software must not be misrepresented; you must not
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15 * claim that you wrote the original software. If you use this software
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16 * in a product, an acknowledgment in the product documentation would be
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17 * appreciated but is not required.
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18 * o Altered source versions must be plainly marked as such, and must not
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19 * be misrepresented as being the original software.
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20 * o This notice may not be removed or altered from any source
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21 * distribution.
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22 */
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23
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24 /*
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25 * Modified by Sean Kelly <sean@f4.ca> for use with Tango.
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26 */
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27
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28 private import tango.stdc.string;
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29 //private import tango.stdc.stdio;
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30
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31 /******************************************************
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32 * Support for switch statements switching on strings.
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33 * Input:
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34 * table[] sorted array of strings generated by compiler
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35 * ca string to look up in table
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36 * Output:
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37 * result index of match in table[]
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38 * -1 if not in table
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39 */
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40
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41 extern (C):
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42
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43 int _d_switch_string(char[][] table, char[] ca)
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44 in
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45 {
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46 //printf("in _d_switch_string()\n");
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47 assert(table.length >= 0);
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48 assert(ca.length >= 0);
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49
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50 // Make sure table[] is sorted correctly
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51 int j;
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52
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53 for (j = 1; j < table.length; j++)
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54 {
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55 size_t len1 = table[j - 1].length;
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56 size_t len2 = table[j].length;
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57
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58 assert(len1 <= len2);
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59 if (len1 == len2)
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60 {
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61 int ci;
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62
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63 ci = memcmp(table[j - 1].ptr, table[j].ptr, len1);
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64 assert(ci < 0); // ci==0 means a duplicate
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65 }
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66 }
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67 }
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68 out (result)
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69 {
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70 int i;
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71 int cj;
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72
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73 //printf("out _d_switch_string()\n");
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74 if (result == -1)
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75 {
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76 // Not found
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77 for (i = 0; i < table.length; i++)
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78 {
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79 if (table[i].length == ca.length)
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80 { cj = memcmp(table[i].ptr, ca.ptr, ca.length);
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81 assert(cj != 0);
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82 }
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83 }
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84 }
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85 else
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86 {
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87 assert(0 <= result && result < table.length);
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88 for (i = 0; 1; i++)
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89 {
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90 assert(i < table.length);
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91 if (table[i].length == ca.length)
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92 {
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93 cj = memcmp(table[i].ptr, ca.ptr, ca.length);
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94 if (cj == 0)
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95 {
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96 assert(i == result);
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97 break;
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98 }
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99 }
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100 }
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101 }
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102 }
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103 body
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104 {
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105 //printf("body _d_switch_string(%.*s)\n", ca.length, ca.ptr);
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106 size_t low;
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107 size_t high;
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108 size_t mid;
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109 ptrdiff_t c;
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110 char[] pca;
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111
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112 low = 0;
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113 high = table.length;
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114
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115 version (none)
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116 {
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117 // Print table
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118 printf("ca[] = '%s'\n", cast(char *)ca);
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119 for (mid = 0; mid < high; mid++)
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120 {
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121 pca = table[mid];
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122 printf("table[%d] = %d, '%.*s'\n", mid, pca.length, pca);
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123 }
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124 }
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125 if (high &&
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126 ca.length >= table[0].length &&
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127 ca.length <= table[high - 1].length)
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128 {
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129 // Looking for 0 length string, which would only be at the beginning
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130 if (ca.length == 0)
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131 return 0;
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132
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133 char c1 = ca[0];
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134
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135 // Do binary search
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136 while (low < high)
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137 {
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138 mid = (low + high) >> 1;
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139 pca = table[mid];
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140 c = cast(ptrdiff_t)(ca.length - pca.length);
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141 if (c == 0)
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142 {
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143 c = cast(ubyte)c1 - cast(ubyte)pca[0];
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144 if (c == 0)
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145 {
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146 c = memcmp(ca.ptr, pca.ptr, ca.length);
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147 if (c == 0)
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148 { //printf("found %d\n", mid);
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149 return cast(int)mid;
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150 }
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151 }
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152 }
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153 if (c < 0)
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154 {
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155 high = mid;
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156 }
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157 else
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158 {
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159 low = mid + 1;
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160 }
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161 }
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162 }
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163
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164 //printf("not found\n");
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165 return -1; // not found
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166 }
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167
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168 unittest
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169 {
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170 switch (cast(char []) "c")
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171 {
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172 case "coo":
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173 default:
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174 break;
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175 }
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176 }
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177
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178 /**********************************
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179 * Same thing, but for wide chars.
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180 */
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181
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182 int _d_switch_ustring(wchar[][] table, wchar[] ca)
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183 in
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184 {
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185 //printf("in _d_switch_ustring()\n");
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186 assert(table.length >= 0);
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187 assert(ca.length >= 0);
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188
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189 // Make sure table[] is sorted correctly
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190 int j;
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191
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192 for (j = 1; j < table.length; j++)
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193 {
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194 size_t len1 = table[j - 1].length;
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195 size_t len2 = table[j].length;
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196
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197 assert(len1 <= len2);
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198 if (len1 == len2)
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199 {
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200 int c;
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201
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202 c = memcmp(table[j - 1].ptr, table[j].ptr, len1 * wchar.sizeof);
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203 assert(c < 0); // c==0 means a duplicate
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204 }
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205 }
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206 }
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207 out (result)
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208 {
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209 int i;
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210 int c;
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211
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212 //printf("out _d_switch_string()\n");
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213 if (result == -1)
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214 {
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215 // Not found
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216 for (i = 0; i < table.length; i++)
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217 {
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218 if (table[i].length == ca.length)
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219 { c = memcmp(table[i].ptr, ca.ptr, ca.length * wchar.sizeof);
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diff changeset
220 assert(c != 0);
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221 }
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222 }
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223 }
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224 else
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225 {
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226 assert(0 <= result && result < table.length);
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227 for (i = 0; 1; i++)
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228 {
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229 assert(i < table.length);
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230 if (table[i].length == ca.length)
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231 {
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232 c = memcmp(table[i].ptr, ca.ptr, ca.length * wchar.sizeof);
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233 if (c == 0)
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234 {
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235 assert(i == result);
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236 break;
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237 }
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238 }
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239 }
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240 }
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241 }
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242 body
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243 {
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244 //printf("body _d_switch_ustring()\n");
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245 size_t low;
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246 size_t high;
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247 size_t mid;
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248 ptrdiff_t c;
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249 wchar[] pca;
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250
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251 low = 0;
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252 high = table.length;
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253
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254 /*
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255 // Print table
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256 wprintf("ca[] = '%.*s'\n", ca);
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257 for (mid = 0; mid < high; mid++)
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258 {
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259 pca = table[mid];
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260 wprintf("table[%d] = %d, '%.*s'\n", mid, pca.length, pca);
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261 }
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262 */
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263
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264 // Do binary search
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265 while (low < high)
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266 {
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267 mid = (low + high) >> 1;
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268 pca = table[mid];
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269 c = cast(ptrdiff_t)(ca.length - pca.length);
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270 if (c == 0)
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271 {
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272 c = memcmp(ca.ptr, pca.ptr, ca.length * wchar.sizeof);
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273 if (c == 0)
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274 { //printf("found %d\n", mid);
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275 return cast(int)mid;
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276 }
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277 }
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278 if (c < 0)
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279 {
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280 high = mid;
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281 }
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282 else
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283 {
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284 low = mid + 1;
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285 }
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286 }
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287 //printf("not found\n");
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288 return -1; // not found
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289 }
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290
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291
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292 unittest
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293 {
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294 switch (cast(wchar []) "c")
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295 {
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296 case "coo":
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297 default:
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298 break;
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299 }
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300 }
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301
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302
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303 /**********************************
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diff changeset
304 * Same thing, but for wide chars.
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305 */
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306
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diff changeset
307 int _d_switch_dstring(dchar[][] table, dchar[] ca)
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diff changeset
308 in
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309 {
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diff changeset
310 //printf("in _d_switch_dstring()\n");
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diff changeset
311 assert(table.length >= 0);
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diff changeset
312 assert(ca.length >= 0);
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313
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314 // Make sure table[] is sorted correctly
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315 int j;
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316
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317 for (j = 1; j < table.length; j++)
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318 {
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319 size_t len1 = table[j - 1].length;
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320 size_t len2 = table[j].length;
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321
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diff changeset
322 assert(len1 <= len2);
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diff changeset
323 if (len1 == len2)
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324 {
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diff changeset
325 int c;
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diff changeset
326
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parents:
diff changeset
327 c = memcmp(table[j - 1].ptr, table[j].ptr, len1 * dchar.sizeof);
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
328 assert(c < 0); // c==0 means a duplicate
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parents:
diff changeset
329 }
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
330 }
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
331 }
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
332 out (result)
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
333 {
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
334 int i;
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parents:
diff changeset
335 int c;
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parents:
diff changeset
336
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parents:
diff changeset
337 //printf("out _d_switch_string()\n");
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parents:
diff changeset
338 if (result == -1)
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
339 {
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
340 // Not found
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
341 for (i = 0; i < table.length; i++)
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
342 {
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
343 if (table[i].length == ca.length)
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
344 { c = memcmp(table[i].ptr, ca.ptr, ca.length * dchar.sizeof);
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
345 assert(c != 0);
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
346 }
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
347 }
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
348 }
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
349 else
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
350 {
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
351 assert(0 <= result && result < table.length);
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
352 for (i = 0; 1; i++)
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
353 {
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
354 assert(i < table.length);
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
355 if (table[i].length == ca.length)
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
356 {
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
357 c = memcmp(table[i].ptr, ca.ptr, ca.length * dchar.sizeof);
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
358 if (c == 0)
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
359 {
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
360 assert(i == result);
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parents:
diff changeset
361 break;
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
362 }
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
363 }
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
364 }
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
365 }
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
366 }
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parents:
diff changeset
367 body
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
368 {
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
369 //printf("body _d_switch_ustring()\n");
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parents:
diff changeset
370 size_t low;
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diff changeset
371 size_t high;
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
372 size_t mid;
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diff changeset
373 ptrdiff_t c;
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diff changeset
374 dchar[] pca;
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parents:
diff changeset
375
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diff changeset
376 low = 0;
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diff changeset
377 high = table.length;
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parents:
diff changeset
378
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parents:
diff changeset
379 /*
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parents:
diff changeset
380 // Print table
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diff changeset
381 wprintf("ca[] = '%.*s'\n", ca);
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parents:
diff changeset
382 for (mid = 0; mid < high; mid++)
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
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parents:
diff changeset
383 {
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parents:
diff changeset
384 pca = table[mid];
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diff changeset
385 wprintf("table[%d] = %d, '%.*s'\n", mid, pca.length, pca);
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
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parents:
diff changeset
386 }
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parents:
diff changeset
387 */
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parents:
diff changeset
388
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
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parents:
diff changeset
389 // Do binary search
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parents:
diff changeset
390 while (low < high)
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
391 {
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parents:
diff changeset
392 mid = (low + high) >> 1;
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parents:
diff changeset
393 pca = table[mid];
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parents:
diff changeset
394 c = cast(ptrdiff_t)(ca.length - pca.length);
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
395 if (c == 0)
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
396 {
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
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parents:
diff changeset
397 c = memcmp(ca.ptr, pca.ptr, ca.length * dchar.sizeof);
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
398 if (c == 0)
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
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parents:
diff changeset
399 { //printf("found %d\n", mid);
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
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parents:
diff changeset
400 return cast(int)mid;
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
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parents:
diff changeset
401 }
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
402 }
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
403 if (c < 0)
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
404 {
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
405 high = mid;
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
406 }
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
407 else
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
408 {
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
409 low = mid + 1;
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
410 }
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
411 }
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
412 //printf("not found\n");
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parents:
diff changeset
413 return -1; // not found
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
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parents:
diff changeset
414 }
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
415
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
416
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
417 unittest
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parents:
diff changeset
418 {
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
419 switch (cast(dchar []) "c")
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
420 {
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
421 case "coo":
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
422 default:
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
423 break;
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
424 }
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
425 }