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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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30 import core.stdc.string;
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31
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32 class StringExp : Expression
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33 {
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34 void* string_; // char, wchar, or dchar data
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35 size_t len; // number of chars, wchars, or dchars
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36 ubyte sz; // 1: char, 2: wchar, 4: dchar
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37 ubyte committed; // !=0 if type is committed
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38 ubyte postfix; // 'c', 'w', 'd'
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39
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40 this(Loc loc, string s)
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41 {
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42 this(loc, s, 0);
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43 }
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44
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45 this(Loc loc, string s, ubyte postfix)
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46 {
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47 super(loc, TOK.TOKstring, StringExp.sizeof);
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48
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49 this.string_ = cast(void*)s.ptr;
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50 this.len = s.length;
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51 this.sz = 1;
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52 this.committed = 0;
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53 this.postfix = postfix;
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54 }
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55
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56 int equals(Object o)
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57 {
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58 assert(false);
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59 }
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60
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61 string toChars()
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62 {
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63 assert(false);
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64 }
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65
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66 Expression semantic(Scope sc)
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67 {
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68 version (LOGSEMANTIC) {
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69 printf("StringExp.semantic() %s\n", toChars());
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70 }
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71 if (!type)
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72 {
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73 scope OutBuffer buffer = new OutBuffer();
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74 size_t newlen = 0;
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75 string p;
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76 size_t u;
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77 dchar c;
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78
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79 switch (postfix)
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80 {
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81 case 'd':
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82 for (u = 0; u < len;)
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83 {
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84 p = utf_decodeChar(cast(string)string_[0..len], &u, &c);
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85 if (p !is null)
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86 {
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87 error("%s", p);
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88 break;
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89 }
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90 else
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91 {
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92 buffer.write4(c);
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93 newlen++;
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94 }
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95 }
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96 buffer.write4(0);
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97 string_ = buffer.extractData();
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98 len = newlen;
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99 sz = 4;
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100 //type = new TypeSArray(Type.tdchar, new IntegerExp(loc, len, Type.tindex));
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101 type = new TypeDArray(Type.tdchar.invariantOf());
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102 committed = 1;
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103 break;
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104
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105 case 'w':
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106 for (u = 0; u < len;)
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107 {
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108 p = utf_decodeChar(cast(string)string_[0..len], &u, &c);
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109 if (p !is null)
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110 {
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111 error("%s", p);
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112 break;
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113 }
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114 else
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115 {
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116 buffer.writeUTF16(c);
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117 newlen++;
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118 if (c >= 0x10000)
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119 newlen++;
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120 }
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121 }
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122 buffer.writeUTF16(0);
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123 string_ = buffer.extractData();
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124 len = newlen;
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125 sz = 2;
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126 //type = new TypeSArray(Type.twchar, new IntegerExp(loc, len, Type.tindex));
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127 type = new TypeDArray(Type.twchar.invariantOf());
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128 committed = 1;
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129 break;
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130
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131 case 'c':
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132 committed = 1;
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133 default:
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134 //type = new TypeSArray(Type.tchar, new IntegerExp(loc, len, Type.tindex));
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135 type = new TypeDArray(Type.tchar.invariantOf());
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136 break;
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137 }
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138 type = type.semantic(loc, sc);
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139 //type = type.invariantOf();
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140 //printf("type = %s\n", type.toChars());
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141 }
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142 return this;
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143 }
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144
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145 Expression interpret(InterState* istate)
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146 {
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147 assert(false);
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148 }
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149
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150 size_t length()
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151 {
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152 assert(false);
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153 }
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154
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155 StringExp toUTF8(Scope sc)
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156 {
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157 assert(false);
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158 }
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159
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160 Expression implicitCastTo(Scope sc, Type t)
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161 {
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162 //printf("StringExp.implicitCastTo(%s of type %s) => %s\n", toChars(), type.toChars(), t.toChars());
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163 ubyte committed = this.committed;
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164 Expression e = Expression.implicitCastTo(sc, t);
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165 if (e.op == TOK.TOKstring)
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166 {
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167 // Retain polysemous nature if it started out that way
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168 (cast(StringExp)e).committed = committed;
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169 }
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170 return e;
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171 }
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172
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173 MATCH implicitConvTo(Type t)
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174 {
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175 MATCH m;
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176
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177 static if (false) {
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178 printf("StringExp.implicitConvTo(this=%s, committed=%d, type=%s, t=%s)\n",
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179 toChars(), committed, type.toChars(), t.toChars());
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180 }
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181 if (!committed)
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182 {
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183 if (!committed && t.ty == TY.Tpointer && t.nextOf().ty == TY.Tvoid)
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184 {
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185 return MATCH.MATCHnomatch;
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186 }
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187 if (type.ty == TY.Tsarray || type.ty == TY.Tarray || type.ty == TY.Tpointer)
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188 {
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189 TY tyn = type.nextOf().ty;
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190 if (tyn == TY.Tchar || tyn == TY.Twchar || tyn == TY.Tdchar)
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191 {
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192 Type tn;
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193 MATCH mm;
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194
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195 switch (t.ty)
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196 {
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197 case TY.Tsarray:
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198 if (type.ty == TY.Tsarray)
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199 {
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200 if ((cast(TypeSArray)type).dim.toInteger() !=
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201 (cast(TypeSArray)t).dim.toInteger())
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202 return MATCH.MATCHnomatch;
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203 TY tynto = t.nextOf().ty;
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204 if (tynto == TY.Tchar || tynto == TY.Twchar || tynto == TY.Tdchar)
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205 return MATCH.MATCHexact;
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206 }
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207 else if (type.ty == TY.Tarray)
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208 {
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209 if (length() > (cast(TypeSArray)t).dim.toInteger())
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210 return MATCH.MATCHnomatch;
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211 TY tynto = t.nextOf().ty;
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212 if (tynto == TY.Tchar || tynto == TY.Twchar || tynto == TY.Tdchar)
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213 return MATCH.MATCHexact;
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214 }
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215 case TY.Tarray:
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216 case TY.Tpointer:
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217 tn = t.nextOf();
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218 mm = MATCH.MATCHexact;
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219 if (type.nextOf().mod != tn.mod)
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220 {
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221 if (!tn.isConst())
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222 return MATCH.MATCHnomatch;
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223 mm = MATCH.MATCHconst;
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224 }
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225 switch (tn.ty)
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226 {
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227 case TY.Tchar:
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228 case TY.Twchar:
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229 case TY.Tdchar:
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230 return mm;
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231 }
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232 break;
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233 default:
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234 break; ///
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235 }
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236 }
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237 }
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238 }
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239 return Expression.implicitConvTo(t);
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240 static if (false) {
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241 m = cast(MATCH)type.implicitConvTo(t);
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242 if (m)
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243 {
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244 return m;
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245 }
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246
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247 return MATCH.MATCHnomatch;
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248 }
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249 }
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250
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251 static uint X(TY tf, TY tt) {
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252 return ((tf) * 256 + (tt));
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253 }
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254
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255 Expression castTo(Scope sc, Type t)
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256 {
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257 /* This follows copy-on-write; any changes to 'this'
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258 * will result in a copy.
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259 * The this.string member is considered immutable.
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260 */
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261 StringExp se;
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262 Type tb;
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263 int copied = 0;
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264
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265 //printf("StringExp.castTo(t = %s), '%s' committed = %d\n", t.toChars(), toChars(), committed);
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266
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267 if (!committed && t.ty == TY.Tpointer && t.nextOf().ty == TY.Tvoid)
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268 {
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269 error("cannot convert string literal to void*");
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270 }
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271
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272 se = this;
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273 if (!committed)
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274 {
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275 se = cast(StringExp)copy();
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276 se.committed = 1;
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277 copied = 1;
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278 }
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279
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280 if (type == t)
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281 {
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282 return se;
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283 }
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284
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285 tb = t.toBasetype();
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286 //printf("\ttype = %s\n", type.toChars());
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287 if (tb.ty == TY.Tdelegate && type.toBasetype().ty != TY.Tdelegate)
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288 return Expression.castTo(sc, t);
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289
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290 Type typeb = type.toBasetype();
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291 if (typeb == tb)
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292 {
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293 if (!copied)
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294 {
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295 se = cast(StringExp)copy();
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296 copied = 1;
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297 }
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298 se.type = t;
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299 return se;
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300 }
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301
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302 if (committed && tb.ty == TY.Tsarray && typeb.ty == TY.Tarray)
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303 {
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304 se = cast(StringExp)copy();
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305 se.sz = cast(ubyte)tb.nextOf().size();
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306 se.len = (len * sz) / se.sz;
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307 se.committed = 1;
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308 se.type = t;
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309 return se;
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310 }
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311
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312 if (tb.ty != TY.Tsarray && tb.ty != TY.Tarray && tb.ty != TY.Tpointer)
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313 {
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314 if (!copied)
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315 {
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316 se = cast(StringExp)copy();
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317 copied = 1;
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318 }
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319 goto Lcast;
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320 }
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321 if (typeb.ty != TY.Tsarray && typeb.ty != TY.Tarray && typeb.ty != TY.Tpointer)
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322 {
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323 if (!copied)
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324 {
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325 se = cast(StringExp)copy();
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326 copied = 1;
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327 }
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328 goto Lcast;
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329 }
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330
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331 if (typeb.nextOf().size() == tb.nextOf().size())
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332 {
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333 if (!copied)
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334 {
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335 se = cast(StringExp)copy();
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336 copied = 1;
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337 }
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338
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339 if (tb.ty == TY.Tsarray)
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340 goto L2; // handle possible change in static array dimension
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341 se.type = t;
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342 return se;
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343 }
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344
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345 if (committed)
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346 goto Lcast;
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347
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348 {
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349 scope OutBuffer buffer = new OutBuffer();
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350 size_t newlen = 0;
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351 TY tfty = typeb.nextOf().toBasetype().ty;
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352 TY ttty = tb.nextOf().toBasetype().ty;
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353 switch (X(tfty, ttty))
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354 {
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355 case X(TY.Tchar, TY.Tchar):
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356 case X(TY.Twchar,TY.Twchar):
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357 case X(TY.Tdchar,TY.Tdchar):
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358 break;
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359
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360 case X(TY.Tchar, TY.Twchar):
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361 for (size_t u = 0; u < len;)
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362 {
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363 dchar c;
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364 string p = utf_decodeChar(cast(string)se.string_[0..len], &u, &c);
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365 if (p !is null)
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366 error("%s", p);
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367 else
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368 buffer.writeUTF16(c);
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369 }
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370 newlen = buffer.offset / 2;
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371 buffer.writeUTF16(0);
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372 goto L1;
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373
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374 case X(TY.Tchar, TY.Tdchar):
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375 for (size_t u = 0; u < len;)
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376 {
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377 dchar c;
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378 string p = utf_decodeChar(cast(string)se.string_[0..len], &u, &c);
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379 if (p !is null)
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380 error("%s", p);
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381 buffer.write4(c);
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382 newlen++;
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383 }
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384 buffer.write4(0);
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385 goto L1;
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386
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387 case X(TY.Twchar,TY.Tchar):
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388 for (size_t u = 0; u < len;)
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389 {
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390 dchar c;
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391 string p = utf_decodeWchar(cast(wstring)se.string_[0..len], &u, &c);
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392 if (p)
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393 error("%s", p);
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394 else
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395 buffer.writeUTF8(c);
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396 }
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397 newlen = buffer.offset;
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398 buffer.writeUTF8(0);
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399 goto L1;
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400
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401 case X(TY.Twchar,TY.Tdchar):
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402 for (size_t u = 0; u < len;)
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403 {
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404 dchar c;
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405 string p = utf_decodeWchar(cast(wstring)se.string_[0..len], &u, &c);
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406 if (p)
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407 error("%s", p);
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408 buffer.write4(c);
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409 newlen++;
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410 }
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411 buffer.write4(0);
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412 goto L1;
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413
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414 case X(TY.Tdchar,TY.Tchar):
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415 for (size_t u = 0; u < len; u++)
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416 {
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417 dchar c = (cast(dchar*)se.string_)[u];
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418 if (!utf_isValidDchar(c))
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419 error("invalid UCS-32 char \\U%08x", c);
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420 else
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421 buffer.writeUTF8(c);
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422 newlen++;
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423 }
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424 newlen = buffer.offset;
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425 buffer.writeUTF8(0);
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426 goto L1;
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427
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428 case X(TY.Tdchar,TY.Twchar):
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429 for (size_t u = 0; u < len; u++)
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430 {
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431 dchar c = (cast(dchar*)se.string_)[u];
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432 if (!utf_isValidDchar(c))
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433 error("invalid UCS-32 char \\U%08x", c);
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434 else
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435 buffer.writeUTF16(c);
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436 newlen++;
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437 }
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438 newlen = buffer.offset / 2;
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439 buffer.writeUTF16(0);
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440 goto L1;
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441
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|
442 L1:
|
|
|
443 if (!copied)
|
|
|
444 {
|
|
|
445 se = cast(StringExp)copy();
|
|
|
446 copied = 1;
|
|
|
447 }
|
|
|
448 se.string_ = buffer.extractData();
|
|
|
449 se.len = newlen;
|
|
|
450 se.sz = cast(ubyte)tb.nextOf().size();
|
|
|
451 break;
|
|
|
452
|
|
|
453 default:
|
|
|
454 assert(typeb.nextOf().size() != tb.nextOf().size());
|
|
|
455 goto Lcast;
|
|
|
456 }
|
|
|
457 }
|
|
|
458 L2:
|
|
|
459 assert(copied);
|
|
|
460
|
|
|
461 // See if need to truncate or extend the literal
|
|
|
462 if (tb.ty == TY.Tsarray)
|
|
|
463 {
|
|
|
464 int dim2 = cast(int)(cast(TypeSArray)tb).dim.toInteger();
|
|
|
465
|
|
|
466 //printf("dim from = %d, to = %d\n", se.len, dim2);
|
|
|
467
|
|
|
468 // Changing dimensions
|
|
|
469 if (dim2 != se.len)
|
|
|
470 {
|
|
|
471 // Copy when changing the string literal
|
|
|
472 uint newsz = se.sz;
|
|
|
473 void *s;
|
|
|
474 int d;
|
|
|
475
|
|
|
476 d = (dim2 < se.len) ? dim2 : se.len;
|
|
|
477 s = cast(ubyte*)malloc((dim2 + 1) * newsz);
|
|
|
478 memcpy(s, se.string_, d * newsz);
|
|
|
479 // Extend with 0, add terminating 0
|
|
|
480 memset(cast(char*)s + d * newsz, 0, (dim2 + 1 - d) * newsz);
|
|
|
481 se.string_ = s;
|
|
|
482 se.len = dim2;
|
|
|
483 }
|
|
|
484 }
|
|
|
485 se.type = t;
|
|
|
486 return se;
|
|
|
487
|
|
|
488 Lcast:
|
|
|
489 Expression e = new CastExp(loc, se, t);
|
|
|
490 e.type = t; // so semantic() won't be run on e
|
|
|
491 return e;
|
|
|
492 }
|
|
|
493
|
|
|
494 int compare(Object obj)
|
|
|
495 {
|
|
|
496 assert(false);
|
|
|
497 }
|
|
|
498
|
|
|
499 bool isBool(bool result)
|
|
|
500 {
|
|
|
501 assert(false);
|
|
|
502 }
|
|
|
503
|
|
|
504 uint charAt(size_t i)
|
|
|
505 {
|
|
|
506 assert(false);
|
|
|
507 }
|
|
|
508
|
|
|
509 void toCBuffer(OutBuffer buf, HdrGenState* hgs)
|
|
|
510 {
|
|
|
511 assert(false);
|
|
|
512 }
|
|
|
513
|
|
|
514 void toMangleBuffer(OutBuffer buf)
|
|
|
515 {
|
|
|
516 assert(false);
|
|
|
517 }
|
|
|
518
|
|
|
519 elem* toElem(IRState* irs)
|
|
|
520 {
|
|
|
521 elem* e;
|
|
|
522 Type tb = type.toBasetype();
|
|
|
523
|
|
|
524 static if (false) {
|
|
|
525 printf("StringExp.toElem() %s, type = %s\n", toChars(), type.toChars());
|
|
|
526 }
|
|
|
527
|
|
|
528 if (tb.ty == TY.Tarray)
|
|
|
529 {
|
|
|
530 Symbol* si;
|
|
|
531 dt_t* dt;
|
|
|
532 StringTab* st;
|
|
|
533
|
|
|
534 static if (false) {
|
|
|
535 printf("irs.m = %p\n", irs.m);
|
|
|
536 printf(" m = %s\n", irs.m.toChars());
|
|
|
537 printf(" len = %d\n", len);
|
|
|
538 printf(" sz = %d\n", sz);
|
|
|
539 }
|
|
|
540 for (size_t i = 0; i < STSIZE; i++)
|
|
|
541 {
|
|
|
542 st = &stringTab[(stidx + i) % STSIZE];
|
|
|
543 //if (!st.m) continue;
|
|
|
544 //printf(" st.m = %s\n", st.m.toChars());
|
|
|
545 //printf(" st.len = %d\n", st.len);
|
|
|
546 //printf(" st.sz = %d\n", st.sz);
|
|
|
547 if (st.m is irs.m &&
|
|
|
548 st.si &&
|
|
|
549 st.len == len &&
|
|
|
550 st.sz == sz &&
|
|
|
551 memcmp(st.string_, string_, sz * len) == 0)
|
|
|
552 {
|
|
|
553 //printf("use cached value\n");
|
|
|
554 si = st.si; // use cached value
|
|
|
555 goto L1;
|
|
|
556 }
|
|
|
557 }
|
|
|
558
|
|
|
559 stidx = (stidx + 1) % STSIZE;
|
|
|
560 st = &stringTab[stidx];
|
|
|
561
|
|
|
562 dt = null;
|
|
|
563 toDt(&dt);
|
|
|
564
|
|
|
565 si = symbol_generate(SC.SCstatic, type_fake(TYM.TYdarray));
|
|
|
566 si.Sdt = dt;
|
|
|
567 si.Sfl = FL.FLdata;
|
|
|
568 version (ELFOBJ) {// Burton
|
|
|
569 si.Sseg = Segment.CDATA;
|
|
|
570 }
|
|
|
571 version (MACHOBJ) {
|
|
|
572 si.Sseg = Segment.DATA;
|
|
|
573 }
|
|
|
574 outdata(si);
|
|
|
575
|
|
|
576 st.m = irs.m;
|
|
|
577 st.si = si;
|
|
|
578 st.string_ = string_;
|
|
|
579 st.len = len;
|
|
|
580 st.sz = sz;
|
|
|
581 L1:
|
|
|
582 e = el_var(si);
|
|
|
583 }
|
|
|
584 else if (tb.ty == TY.Tsarray)
|
|
|
585 {
|
|
|
586 Symbol *si;
|
|
|
587 dt_t *dt = null;
|
|
|
588
|
|
|
589 toDt(&dt);
|
|
|
590 dtnzeros(&dt, sz); // leave terminating 0
|
|
|
591
|
|
|
592 si = symbol_generate(SC.SCstatic,type_allocn(TYM.TYarray, tschar));
|
|
|
593 si.Sdt = dt;
|
|
|
594 si.Sfl = FL.FLdata;
|
|
|
595
|
|
|
596 version (ELFOBJ_OR_MACHOBJ) { // Burton
|
|
|
597 si.Sseg = Segment.CDATA;
|
|
|
598 }
|
|
|
599 outdata(si);
|
|
|
600
|
|
|
601 e = el_var(si);
|
|
|
602 }
|
|
|
603 else if (tb.ty == TY.Tpointer)
|
|
|
604 {
|
|
|
605 e = el_calloc();
|
|
|
606 e.Eoper = OPER.OPstring;
|
|
|
607 static if (true) {
|
|
|
608 // Match MEM_PH_FREE for OPstring in ztc\el.c
|
|
|
609 e.EV.ss.Vstring = cast(char*)malloc((len + 1) * sz);
|
|
|
610 memcpy(e.EV.ss.Vstring, string_, (len + 1) * sz);
|
|
|
611 } else {
|
|
|
612 e.EV.ss.Vstring = cast(char*)string_;
|
|
|
613 }
|
|
|
614 e.EV.ss.Vstrlen = (len + 1) * sz;
|
|
|
615 e.Ety = TYM.TYnptr;
|
|
|
616 }
|
|
|
617 else
|
|
|
618 {
|
|
|
619 writef("type is %s\n", type.toChars());
|
|
|
620 assert(0);
|
|
|
621 }
|
|
|
622 el_setLoc(e,loc);
|
|
|
623 return e;
|
|
|
624 }
|
|
|
625
|
|
|
626 dt_t** toDt(dt_t** pdt)
|
|
|
627 {
|
|
|
628 //printf("StringExp.toDt() '%s', type = %s\n", toChars(), type.toChars());
|
|
|
629 Type t = type.toBasetype();
|
|
|
630
|
|
|
631 // BUG: should implement some form of static string pooling
|
|
|
632 switch (t.ty)
|
|
|
633 {
|
|
|
634 case TY.Tarray:
|
|
|
635 dtdword(pdt, len);
|
|
|
636 pdt = dtabytes(pdt, TYM.TYnptr, 0, (len + 1) * sz, cast(char*)string_);
|
|
|
637 break;
|
|
|
638
|
|
|
639 case TY.Tsarray:
|
|
|
640 {
|
|
|
641 TypeSArray tsa = cast(TypeSArray)type;
|
|
|
642 long dim;
|
|
|
643
|
|
|
644 pdt = dtnbytes(pdt, len * sz, cast(const(char)*)string_);
|
|
|
645 if (tsa.dim)
|
|
|
646 {
|
|
|
647 dim = tsa.dim.toInteger();
|
|
|
648 if (len < dim)
|
|
|
649 {
|
|
|
650 // Pad remainder with 0
|
|
|
651 pdt = dtnzeros(pdt, cast(uint)((dim - len) * tsa.next.size()));
|
|
|
652 }
|
|
|
653 }
|
|
|
654 break;
|
|
|
655 }
|
|
|
656
|
|
|
657 case TY.Tpointer:
|
|
|
658 pdt = dtabytes(pdt, TYM.TYnptr, 0, (len + 1) * sz, cast(char*)string_);
|
|
|
659 break;
|
|
|
660
|
|
|
661 default:
|
|
|
662 writef("StringExp.toDt(type = %s)\n", type.toChars());
|
|
|
663 assert(0);
|
|
|
664 }
|
|
|
665
|
|
|
666 return pdt;
|
|
|
667 }
|
|
|
668 }
|
|
|
669
|
