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0
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1 module dmd.StringExp;
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2
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3 import dmd.Expression;
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4 import dmd.backend.elem;
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5 import dmd.InterState;
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6 import dmd.TypeSArray;
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7 import dmd.CastExp;
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8 import dmd.MATCH;
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9 import dmd.TY;
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10 import dmd.TypeDArray;
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11 import dmd.Type;
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12 import dmd.TOK;
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13 import dmd.OutBuffer;
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14 import dmd.Loc;
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15 import dmd.Scope;
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16 import dmd.IRState;
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17 import dmd.StringExp;
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18 import dmd.HdrGenState;
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19 import dmd.Utf;
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20 import dmd.backend.dt_t;
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21 import dmd.backend.Symbol;
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22 import dmd.backend.StringTab;
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23 import dmd.backend.Util;
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24 import dmd.backend.SC;
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25 import dmd.backend.TYM;
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26 import dmd.backend.FL;
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27 import dmd.backend.TYPE;
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28 import dmd.backend.OPER;
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29
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4
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30 import core.memory;
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2
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31
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0
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32 import core.stdc.string;
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33
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34 class StringExp : Expression
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35 {
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36 void* string_; // char, wchar, or dchar data
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37 size_t len; // number of chars, wchars, or dchars
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38 ubyte sz; // 1: char, 2: wchar, 4: dchar
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39 ubyte committed; // !=0 if type is committed
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40 ubyte postfix; // 'c', 'w', 'd'
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41
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42 this(Loc loc, string s)
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43 {
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44 this(loc, s, 0);
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45 }
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46
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47 this(Loc loc, string s, ubyte postfix)
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48 {
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49 super(loc, TOK.TOKstring, StringExp.sizeof);
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50
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51 this.string_ = cast(void*)s.ptr;
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52 this.len = s.length;
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53 this.sz = 1;
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54 this.committed = 0;
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55 this.postfix = postfix;
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56 }
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57
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58 int equals(Object o)
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59 {
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60 assert(false);
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61 }
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62
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63 string toChars()
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64 {
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65 assert(false);
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66 }
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67
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68 Expression semantic(Scope sc)
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69 {
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70 version (LOGSEMANTIC) {
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71 printf("StringExp.semantic() %s\n", toChars());
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72 }
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73 if (!type)
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74 {
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75 scope OutBuffer buffer = new OutBuffer();
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76 size_t newlen = 0;
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77 string p;
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78 size_t u;
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79 dchar c;
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80
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81 switch (postfix)
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82 {
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83 case 'd':
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84 for (u = 0; u < len;)
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85 {
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86 p = utf_decodeChar(cast(string)string_[0..len], &u, &c);
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87 if (p !is null)
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88 {
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89 error("%s", p);
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90 break;
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91 }
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92 else
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93 {
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94 buffer.write4(c);
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95 newlen++;
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96 }
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97 }
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98 buffer.write4(0);
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99 string_ = buffer.extractData();
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100 len = newlen;
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101 sz = 4;
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102 //type = new TypeSArray(Type.tdchar, new IntegerExp(loc, len, Type.tindex));
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103 type = new TypeDArray(Type.tdchar.invariantOf());
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104 committed = 1;
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105 break;
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106
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107 case 'w':
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108 for (u = 0; u < len;)
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109 {
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110 p = utf_decodeChar(cast(string)string_[0..len], &u, &c);
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111 if (p !is null)
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112 {
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113 error("%s", p);
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114 break;
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115 }
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116 else
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117 {
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118 buffer.writeUTF16(c);
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119 newlen++;
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120 if (c >= 0x10000)
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121 newlen++;
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122 }
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123 }
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124 buffer.writeUTF16(0);
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125 string_ = buffer.extractData();
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126 len = newlen;
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127 sz = 2;
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128 //type = new TypeSArray(Type.twchar, new IntegerExp(loc, len, Type.tindex));
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129 type = new TypeDArray(Type.twchar.invariantOf());
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130 committed = 1;
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131 break;
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132
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133 case 'c':
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134 committed = 1;
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135 default:
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136 //type = new TypeSArray(Type.tchar, new IntegerExp(loc, len, Type.tindex));
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137 type = new TypeDArray(Type.tchar.invariantOf());
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138 break;
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139 }
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140 type = type.semantic(loc, sc);
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141 //type = type.invariantOf();
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142 //printf("type = %s\n", type.toChars());
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143 }
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144 return this;
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145 }
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146
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147 Expression interpret(InterState* istate)
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148 {
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149 assert(false);
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150 }
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151
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152 size_t length()
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153 {
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154 assert(false);
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155 }
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156
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157 StringExp toUTF8(Scope sc)
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158 {
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159 assert(false);
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160 }
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161
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162 Expression implicitCastTo(Scope sc, Type t)
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163 {
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164 //printf("StringExp.implicitCastTo(%s of type %s) => %s\n", toChars(), type.toChars(), t.toChars());
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165 ubyte committed = this.committed;
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166 Expression e = Expression.implicitCastTo(sc, t);
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167 if (e.op == TOK.TOKstring)
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168 {
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169 // Retain polysemous nature if it started out that way
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170 (cast(StringExp)e).committed = committed;
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171 }
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172 return e;
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173 }
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174
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175 MATCH implicitConvTo(Type t)
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176 {
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177 MATCH m;
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178
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179 static if (false) {
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180 printf("StringExp.implicitConvTo(this=%s, committed=%d, type=%s, t=%s)\n",
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181 toChars(), committed, type.toChars(), t.toChars());
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182 }
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183 if (!committed)
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184 {
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185 if (!committed && t.ty == TY.Tpointer && t.nextOf().ty == TY.Tvoid)
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186 {
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187 return MATCH.MATCHnomatch;
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188 }
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189 if (type.ty == TY.Tsarray || type.ty == TY.Tarray || type.ty == TY.Tpointer)
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190 {
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191 TY tyn = type.nextOf().ty;
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192 if (tyn == TY.Tchar || tyn == TY.Twchar || tyn == TY.Tdchar)
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193 {
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194 Type tn;
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195 MATCH mm;
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196
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197 switch (t.ty)
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198 {
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199 case TY.Tsarray:
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200 if (type.ty == TY.Tsarray)
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201 {
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202 if ((cast(TypeSArray)type).dim.toInteger() !=
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203 (cast(TypeSArray)t).dim.toInteger())
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204 return MATCH.MATCHnomatch;
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205 TY tynto = t.nextOf().ty;
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206 if (tynto == TY.Tchar || tynto == TY.Twchar || tynto == TY.Tdchar)
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207 return MATCH.MATCHexact;
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208 }
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209 else if (type.ty == TY.Tarray)
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210 {
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211 if (length() > (cast(TypeSArray)t).dim.toInteger())
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212 return MATCH.MATCHnomatch;
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213 TY tynto = t.nextOf().ty;
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214 if (tynto == TY.Tchar || tynto == TY.Twchar || tynto == TY.Tdchar)
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215 return MATCH.MATCHexact;
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216 }
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217 case TY.Tarray:
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218 case TY.Tpointer:
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219 tn = t.nextOf();
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220 mm = MATCH.MATCHexact;
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221 if (type.nextOf().mod != tn.mod)
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222 {
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223 if (!tn.isConst())
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224 return MATCH.MATCHnomatch;
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225 mm = MATCH.MATCHconst;
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226 }
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227 switch (tn.ty)
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228 {
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229 case TY.Tchar:
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230 case TY.Twchar:
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231 case TY.Tdchar:
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232 return mm;
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233 }
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234 break;
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235 default:
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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 return Expression.implicitConvTo(t);
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242 static if (false) {
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243 m = cast(MATCH)type.implicitConvTo(t);
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244 if (m)
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245 {
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246 return m;
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247 }
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248
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249 return MATCH.MATCHnomatch;
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250 }
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251 }
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252
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253 static uint X(TY tf, TY tt) {
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254 return ((tf) * 256 + (tt));
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255 }
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256
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257 Expression castTo(Scope sc, Type t)
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258 {
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259 /* This follows copy-on-write; any changes to 'this'
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260 * will result in a copy.
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261 * The this.string member is considered immutable.
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262 */
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263 StringExp se;
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264 Type tb;
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265 int copied = 0;
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266
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267 //printf("StringExp.castTo(t = %s), '%s' committed = %d\n", t.toChars(), toChars(), committed);
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268
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269 if (!committed && t.ty == TY.Tpointer && t.nextOf().ty == TY.Tvoid)
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270 {
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271 error("cannot convert string literal to void*");
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272 }
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273
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274 se = this;
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275 if (!committed)
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276 {
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277 se = cast(StringExp)copy();
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278 se.committed = 1;
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279 copied = 1;
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280 }
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281
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282 if (type == t)
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283 {
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284 return se;
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285 }
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286
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287 tb = t.toBasetype();
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288 //printf("\ttype = %s\n", type.toChars());
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289 if (tb.ty == TY.Tdelegate && type.toBasetype().ty != TY.Tdelegate)
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290 return Expression.castTo(sc, t);
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291
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292 Type typeb = type.toBasetype();
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293 if (typeb == tb)
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294 {
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295 if (!copied)
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296 {
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297 se = cast(StringExp)copy();
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298 copied = 1;
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299 }
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300 se.type = t;
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301 return se;
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302 }
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303
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304 if (committed && tb.ty == TY.Tsarray && typeb.ty == TY.Tarray)
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305 {
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306 se = cast(StringExp)copy();
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307 se.sz = cast(ubyte)tb.nextOf().size();
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308 se.len = (len * sz) / se.sz;
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309 se.committed = 1;
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310 se.type = t;
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311 return se;
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312 }
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313
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314 if (tb.ty != TY.Tsarray && tb.ty != TY.Tarray && tb.ty != TY.Tpointer)
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315 {
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316 if (!copied)
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317 {
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318 se = cast(StringExp)copy();
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319 copied = 1;
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320 }
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321 goto Lcast;
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322 }
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323 if (typeb.ty != TY.Tsarray && typeb.ty != TY.Tarray && typeb.ty != TY.Tpointer)
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324 {
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325 if (!copied)
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326 {
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327 se = cast(StringExp)copy();
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328 copied = 1;
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329 }
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330 goto Lcast;
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331 }
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332
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333 if (typeb.nextOf().size() == tb.nextOf().size())
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334 {
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335 if (!copied)
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336 {
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337 se = cast(StringExp)copy();
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338 copied = 1;
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339 }
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340
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341 if (tb.ty == TY.Tsarray)
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342 goto L2; // handle possible change in static array dimension
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343 se.type = t;
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344 return se;
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345 }
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346
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347 if (committed)
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348 goto Lcast;
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349
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350 {
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351 scope OutBuffer buffer = new OutBuffer();
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352 size_t newlen = 0;
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353 TY tfty = typeb.nextOf().toBasetype().ty;
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354 TY ttty = tb.nextOf().toBasetype().ty;
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355 switch (X(tfty, ttty))
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356 {
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357 case X(TY.Tchar, TY.Tchar):
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358 case X(TY.Twchar,TY.Twchar):
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359 case X(TY.Tdchar,TY.Tdchar):
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360 break;
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361
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362 case X(TY.Tchar, TY.Twchar):
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363 for (size_t u = 0; u < len;)
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364 {
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365 dchar c;
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366 string p = utf_decodeChar(cast(string)se.string_[0..len], &u, &c);
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367 if (p !is null)
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368 error("%s", p);
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369 else
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370 buffer.writeUTF16(c);
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371 }
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372 newlen = buffer.offset / 2;
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373 buffer.writeUTF16(0);
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374 goto L1;
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375
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376 case X(TY.Tchar, TY.Tdchar):
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377 for (size_t u = 0; u < len;)
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378 {
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379 dchar c;
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380 string p = utf_decodeChar(cast(string)se.string_[0..len], &u, &c);
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381 if (p !is null)
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382 error("%s", p);
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383 buffer.write4(c);
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384 newlen++;
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385 }
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386 buffer.write4(0);
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387 goto L1;
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388
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389 case X(TY.Twchar,TY.Tchar):
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390 for (size_t u = 0; u < len;)
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391 {
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392 dchar c;
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393 string p = utf_decodeWchar(cast(wstring)se.string_[0..len], &u, &c);
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394 if (p)
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395 error("%s", p);
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396 else
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397 buffer.writeUTF8(c);
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398 }
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399 newlen = buffer.offset;
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400 buffer.writeUTF8(0);
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401 goto L1;
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402
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403 case X(TY.Twchar,TY.Tdchar):
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404 for (size_t u = 0; u < len;)
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405 {
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406 dchar c;
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407 string p = utf_decodeWchar(cast(wstring)se.string_[0..len], &u, &c);
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408 if (p)
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409 error("%s", p);
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410 buffer.write4(c);
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411 newlen++;
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412 }
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413 buffer.write4(0);
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414 goto L1;
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415
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416 case X(TY.Tdchar,TY.Tchar):
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417 for (size_t u = 0; u < len; u++)
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418 {
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419 dchar c = (cast(dchar*)se.string_)[u];
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420 if (!utf_isValidDchar(c))
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421 error("invalid UCS-32 char \\U%08x", c);
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422 else
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423 buffer.writeUTF8(c);
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424 newlen++;
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425 }
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426 newlen = buffer.offset;
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427 buffer.writeUTF8(0);
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428 goto L1;
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429
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430 case X(TY.Tdchar,TY.Twchar):
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431 for (size_t u = 0; u < len; u++)
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432 {
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433 dchar c = (cast(dchar*)se.string_)[u];
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434 if (!utf_isValidDchar(c))
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435 error("invalid UCS-32 char \\U%08x", c);
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436 else
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437 buffer.writeUTF16(c);
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438 newlen++;
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439 }
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440 newlen = buffer.offset / 2;
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441 buffer.writeUTF16(0);
|
|
|
442 goto L1;
|
|
|
443
|
|
|
444 L1:
|
|
|
445 if (!copied)
|
|
|
446 {
|
|
|
447 se = cast(StringExp)copy();
|
|
|
448 copied = 1;
|
|
|
449 }
|
|
|
450 se.string_ = buffer.extractData();
|
|
|
451 se.len = newlen;
|
|
|
452 se.sz = cast(ubyte)tb.nextOf().size();
|
|
|
453 break;
|
|
|
454
|
|
|
455 default:
|
|
|
456 assert(typeb.nextOf().size() != tb.nextOf().size());
|
|
|
457 goto Lcast;
|
|
|
458 }
|
|
|
459 }
|
|
|
460 L2:
|
|
|
461 assert(copied);
|
|
|
462
|
|
|
463 // See if need to truncate or extend the literal
|
|
|
464 if (tb.ty == TY.Tsarray)
|
|
|
465 {
|
|
|
466 int dim2 = cast(int)(cast(TypeSArray)tb).dim.toInteger();
|
|
|
467
|
|
|
468 //printf("dim from = %d, to = %d\n", se.len, dim2);
|
|
|
469
|
|
|
470 // Changing dimensions
|
|
|
471 if (dim2 != se.len)
|
|
|
472 {
|
|
|
473 // Copy when changing the string literal
|
|
|
474 uint newsz = se.sz;
|
|
|
475 void *s;
|
|
|
476 int d;
|
|
|
477
|
|
|
478 d = (dim2 < se.len) ? dim2 : se.len;
|
|
2
|
479 s = cast(ubyte*)GC.malloc((dim2 + 1) * newsz);
|
|
0
|
480 memcpy(s, se.string_, d * newsz);
|
|
|
481 // Extend with 0, add terminating 0
|
|
|
482 memset(cast(char*)s + d * newsz, 0, (dim2 + 1 - d) * newsz);
|
|
|
483 se.string_ = s;
|
|
|
484 se.len = dim2;
|
|
|
485 }
|
|
|
486 }
|
|
|
487 se.type = t;
|
|
|
488 return se;
|
|
|
489
|
|
|
490 Lcast:
|
|
|
491 Expression e = new CastExp(loc, se, t);
|
|
|
492 e.type = t; // so semantic() won't be run on e
|
|
|
493 return e;
|
|
|
494 }
|
|
|
495
|
|
|
496 int compare(Object obj)
|
|
|
497 {
|
|
|
498 assert(false);
|
|
|
499 }
|
|
|
500
|
|
|
501 bool isBool(bool result)
|
|
|
502 {
|
|
|
503 assert(false);
|
|
|
504 }
|
|
|
505
|
|
|
506 uint charAt(size_t i)
|
|
|
507 {
|
|
|
508 assert(false);
|
|
|
509 }
|
|
|
510
|
|
|
511 void toCBuffer(OutBuffer buf, HdrGenState* hgs)
|
|
|
512 {
|
|
|
513 assert(false);
|
|
|
514 }
|
|
|
515
|
|
|
516 void toMangleBuffer(OutBuffer buf)
|
|
|
517 {
|
|
|
518 assert(false);
|
|
|
519 }
|
|
|
520
|
|
|
521 elem* toElem(IRState* irs)
|
|
|
522 {
|
|
|
523 elem* e;
|
|
|
524 Type tb = type.toBasetype();
|
|
|
525
|
|
|
526 static if (false) {
|
|
|
527 printf("StringExp.toElem() %s, type = %s\n", toChars(), type.toChars());
|
|
|
528 }
|
|
|
529
|
|
|
530 if (tb.ty == TY.Tarray)
|
|
|
531 {
|
|
|
532 Symbol* si;
|
|
|
533 dt_t* dt;
|
|
|
534 StringTab* st;
|
|
|
535
|
|
|
536 static if (false) {
|
|
|
537 printf("irs.m = %p\n", irs.m);
|
|
|
538 printf(" m = %s\n", irs.m.toChars());
|
|
|
539 printf(" len = %d\n", len);
|
|
|
540 printf(" sz = %d\n", sz);
|
|
|
541 }
|
|
|
542 for (size_t i = 0; i < STSIZE; i++)
|
|
|
543 {
|
|
|
544 st = &stringTab[(stidx + i) % STSIZE];
|
|
|
545 //if (!st.m) continue;
|
|
|
546 //printf(" st.m = %s\n", st.m.toChars());
|
|
|
547 //printf(" st.len = %d\n", st.len);
|
|
|
548 //printf(" st.sz = %d\n", st.sz);
|
|
|
549 if (st.m is irs.m &&
|
|
|
550 st.si &&
|
|
|
551 st.len == len &&
|
|
|
552 st.sz == sz &&
|
|
|
553 memcmp(st.string_, string_, sz * len) == 0)
|
|
|
554 {
|
|
|
555 //printf("use cached value\n");
|
|
|
556 si = st.si; // use cached value
|
|
|
557 goto L1;
|
|
|
558 }
|
|
|
559 }
|
|
|
560
|
|
|
561 stidx = (stidx + 1) % STSIZE;
|
|
|
562 st = &stringTab[stidx];
|
|
|
563
|
|
|
564 dt = null;
|
|
|
565 toDt(&dt);
|
|
|
566
|
|
|
567 si = symbol_generate(SC.SCstatic, type_fake(TYM.TYdarray));
|
|
|
568 si.Sdt = dt;
|
|
|
569 si.Sfl = FL.FLdata;
|
|
|
570 version (ELFOBJ) {// Burton
|
|
|
571 si.Sseg = Segment.CDATA;
|
|
|
572 }
|
|
|
573 version (MACHOBJ) {
|
|
|
574 si.Sseg = Segment.DATA;
|
|
|
575 }
|
|
|
576 outdata(si);
|
|
|
577
|
|
|
578 st.m = irs.m;
|
|
|
579 st.si = si;
|
|
|
580 st.string_ = string_;
|
|
|
581 st.len = len;
|
|
|
582 st.sz = sz;
|
|
|
583 L1:
|
|
|
584 e = el_var(si);
|
|
|
585 }
|
|
|
586 else if (tb.ty == TY.Tsarray)
|
|
|
587 {
|
|
|
588 Symbol *si;
|
|
|
589 dt_t *dt = null;
|
|
|
590
|
|
|
591 toDt(&dt);
|
|
|
592 dtnzeros(&dt, sz); // leave terminating 0
|
|
|
593
|
|
|
594 si = symbol_generate(SC.SCstatic,type_allocn(TYM.TYarray, tschar));
|
|
|
595 si.Sdt = dt;
|
|
|
596 si.Sfl = FL.FLdata;
|
|
|
597
|
|
|
598 version (ELFOBJ_OR_MACHOBJ) { // Burton
|
|
|
599 si.Sseg = Segment.CDATA;
|
|
|
600 }
|
|
|
601 outdata(si);
|
|
|
602
|
|
|
603 e = el_var(si);
|
|
|
604 }
|
|
|
605 else if (tb.ty == TY.Tpointer)
|
|
|
606 {
|
|
|
607 e = el_calloc();
|
|
|
608 e.Eoper = OPER.OPstring;
|
|
|
609 static if (true) {
|
|
|
610 // Match MEM_PH_FREE for OPstring in ztc\el.c
|
|
2
|
611 e.EV.ss.Vstring = cast(char*)GC.malloc((len + 1) * sz);
|
|
0
|
612 memcpy(e.EV.ss.Vstring, string_, (len + 1) * sz);
|
|
|
613 } else {
|
|
|
614 e.EV.ss.Vstring = cast(char*)string_;
|
|
|
615 }
|
|
|
616 e.EV.ss.Vstrlen = (len + 1) * sz;
|
|
|
617 e.Ety = TYM.TYnptr;
|
|
|
618 }
|
|
|
619 else
|
|
|
620 {
|
|
|
621 writef("type is %s\n", type.toChars());
|
|
|
622 assert(0);
|
|
|
623 }
|
|
|
624 el_setLoc(e,loc);
|
|
|
625 return e;
|
|
|
626 }
|
|
|
627
|
|
|
628 dt_t** toDt(dt_t** pdt)
|
|
|
629 {
|
|
|
630 //printf("StringExp.toDt() '%s', type = %s\n", toChars(), type.toChars());
|
|
|
631 Type t = type.toBasetype();
|
|
|
632
|
|
|
633 // BUG: should implement some form of static string pooling
|
|
|
634 switch (t.ty)
|
|
|
635 {
|
|
|
636 case TY.Tarray:
|
|
|
637 dtdword(pdt, len);
|
|
|
638 pdt = dtabytes(pdt, TYM.TYnptr, 0, (len + 1) * sz, cast(char*)string_);
|
|
|
639 break;
|
|
|
640
|
|
|
641 case TY.Tsarray:
|
|
|
642 {
|
|
|
643 TypeSArray tsa = cast(TypeSArray)type;
|
|
|
644 long dim;
|
|
|
645
|
|
|
646 pdt = dtnbytes(pdt, len * sz, cast(const(char)*)string_);
|
|
|
647 if (tsa.dim)
|
|
|
648 {
|
|
|
649 dim = tsa.dim.toInteger();
|
|
|
650 if (len < dim)
|
|
|
651 {
|
|
|
652 // Pad remainder with 0
|
|
|
653 pdt = dtnzeros(pdt, cast(uint)((dim - len) * tsa.next.size()));
|
|
|
654 }
|
|
|
655 }
|
|
|
656 break;
|
|
|
657 }
|
|
|
658
|
|
|
659 case TY.Tpointer:
|
|
|
660 pdt = dtabytes(pdt, TYM.TYnptr, 0, (len + 1) * sz, cast(char*)string_);
|
|
|
661 break;
|
|
|
662
|
|
|
663 default:
|
|
|
664 writef("StringExp.toDt(type = %s)\n", type.toChars());
|
|
|
665 assert(0);
|
|
|
666 }
|
|
|
667
|
|
|
668 return pdt;
|
|
|
669 }
|
|
|
670 }
|
|
|
671
|
