0
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1 module dmd.IntegerExp;
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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.TY;
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6 import dmd.TypeEnum;
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7 import dmd.TypeTypedef;
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8 import dmd.Global;
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9 import dmd.InterState;
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10 import dmd.MATCH;
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11 import dmd.Type;
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12 import dmd.OutBuffer;
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13 import dmd.Loc;
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14 import dmd.Scope;
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15 import dmd.IntRange;
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16 import dmd.IRState;
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17 import dmd.HdrGenState;
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18 import dmd.TOK;
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19 import dmd.Complex;
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20
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21 import dmd.backend.dt_t;
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22 import dmd.backend.Util;
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23
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24 import core.stdc.ctype : isprint;
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25
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26 class IntegerExp : Expression
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27 {
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28 ulong value;
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29
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30 this(Loc loc, ulong value, Type type)
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31 {
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32 super(loc, TOK.TOKint64, IntegerExp.sizeof);
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33
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34 //printf("IntegerExp(value = %lld, type = '%s')\n", value, type ? type.toChars() : "");
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35 if (type && !type.isscalar())
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36 {
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37 //printf("%s, loc = %d\n", toChars(), loc.linnum);
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38 error("integral constant must be scalar type, not %s", type.toChars());
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39 type = Type.terror;
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40 }
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41 this.type = type;
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42 this.value = value;
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43 }
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44
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45 this(ulong value)
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46 {
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47 super(Loc(0), TOK.TOKint64, IntegerExp.sizeof);
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48 this.type = Type.tint32;
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49 this.value = value;
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50 }
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51
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52 int equals(Object o)
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53 {
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54 IntegerExp ne;
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55
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56 if (this == o ||
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57 ((cast(Expression)o).op == TOKint64 &&
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58 ((ne = cast(IntegerExp)o), type.toHeadMutable().equals(ne.type.toHeadMutable())) &&
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59 value == ne.value)
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60 )
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61 return 1;
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62
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63 return 0;
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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 if (!type)
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69 {
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70 // Determine what the type of this number is
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71 ulong number = value;
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72
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73 if (number & 0x8000000000000000)
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74 type = Type.tuns64;
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75 else if (number & 0xFFFFFFFF80000000)
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76 type = Type.tint64;
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77 else
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78 type = Type.tint32;
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79 }
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80 else
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81 { if (!type.deco)
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82 type = type.semantic(loc, sc);
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83 }
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84 return this;
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85 }
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86
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87 Expression interpret(InterState* istate)
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88 {
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89 assert(false);
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90 }
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91
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92 string toChars()
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93 {
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94 static if (true) {
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95 return Expression.toChars();
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96 } else {
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97 static char buffer[value.sizeof * 3 + 1];
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98 int len = sprintf(buffer.ptr, "%jd", value);
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99 return buffer[0..len].idup;
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100 }
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101 }
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102
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103 void dump(int indent)
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104 {
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105 assert(false);
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106 }
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107
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108 IntRange getIntRange()
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109 {
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110 assert(false);
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111 }
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112
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113 ulong toInteger()
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114 {
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115 Type t;
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116
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117 t = type;
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118 while (t)
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119 {
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120 switch (t.ty)
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121 {
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122 case TY.Tbit:
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123 case TY.Tbool: value = (value != 0); break;
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124 case TY.Tint8: value = cast(byte) value; break;
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125 case TY.Tchar:
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126 case TY.Tuns8: value = cast(ubyte) value; break;
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127 case TY.Tint16: value = cast(short) value; break;
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128 case TY.Twchar:
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129 case TY.Tuns16: value = cast(ushort)value; break;
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130 case TY.Tint32: value = cast(int) value; break;
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131 case TY.Tdchar:
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132 case TY.Tuns32: value = cast(uint) value; break;
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133 case TY.Tint64: value = cast(long) value; break;
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134 case TY.Tuns64: value = cast(ulong) value; break;
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135 case TY.Tpointer:
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136 if (PTRSIZE == 4)
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137 value = cast(uint) value;
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138 else if (PTRSIZE == 8)
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139 value = cast(ulong) value;
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140 else
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141 assert(0);
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142 break;
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143
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144 case TY.Tenum:
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145 {
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146 TypeEnum te = cast(TypeEnum)t;
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147 t = te.sym.memtype;
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148 continue;
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149 }
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150
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151 case TY.Ttypedef:
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152 {
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153 TypeTypedef tt = cast(TypeTypedef)t;
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154 t = tt.sym.basetype;
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155 continue;
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156 }
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157
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158 default:
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159 /* This can happen if errors, such as
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160 * the type is painted on like in fromConstInitializer().
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161 */
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162 if (!global.errors)
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163 {
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164 ///type.print();
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165 assert(0);
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166 }
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167 break;
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168 }
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169 break;
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170 }
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171 return value;
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172 }
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173
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174 real toReal()
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175 {
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176 Type t;
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177
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178 toInteger();
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179 t = type.toBasetype();
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180 if (t.ty == Tuns64)
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181 return cast(real)cast(ulong)value;
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182 else
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183 return cast(real)cast(long)value;
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184 }
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185
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186 real toImaginary()
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187 {
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188 assert(false);
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189 }
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190
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191 Complex!(real) toComplex()
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192 {
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193 assert(false);
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194 }
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195
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196 int isConst()
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197 {
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198 return 1;
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199 }
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200
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201 bool isBool(bool result)
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202 {
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203 return result ? value != 0 : value == 0;
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204 }
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205
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206 MATCH implicitConvTo(Type t)
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207 {
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208 static if (false) {
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209 printf("IntegerExp.implicitConvTo(this=%s, type=%s, t=%s)\n",
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210 toChars(), type.toChars(), t.toChars());
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211 }
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212
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213 MATCH m = type.implicitConvTo(t);
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214 if (m >= MATCH.MATCHconst)
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215 return m;
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216
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217 TY ty = type.toBasetype().ty;
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218 TY toty = t.toBasetype().ty;
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219
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220 if (m == MATCH.MATCHnomatch && t.ty == TY.Tenum)
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221 goto Lno;
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222
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223 switch (ty)
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224 {
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225 case TY.Tbit:
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226 case TY.Tbool:
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227 value &= 1;
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228 ty = TY.Tint32;
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229 break;
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230
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231 case TY.Tint8:
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232 value = cast(byte)value;
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233 ty = TY.Tint32;
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234 break;
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235
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236 case TY.Tchar:
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237 case TY.Tuns8:
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238 value &= 0xFF;
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239 ty = TY.Tint32;
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240 break;
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241
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242 case TY.Tint16:
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243 value = cast(short)value;
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244 ty = TY.Tint32;
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245 break;
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246
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247 case TY.Tuns16:
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248 case TY.Twchar:
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249 value &= 0xFFFF;
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250 ty = TY.Tint32;
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251 break;
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252
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253 case TY.Tint32:
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254 value = cast(int)value;
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255 break;
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256
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257 case TY.Tuns32:
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258 case TY.Tdchar:
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259 value &= 0xFFFFFFFF;
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260 ty = TY.Tuns32;
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261 break;
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262
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263 default:
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264 break;
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265 }
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266
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267 // Only allow conversion if no change in value
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268 switch (toty)
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269 {
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270 case TY.Tbit:
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271 case TY.Tbool:
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272 if ((value & 1) != value)
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273 goto Lno;
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274 goto Lyes;
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275
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276 case TY.Tint8:
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277 if (cast(byte)value != value)
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278 goto Lno;
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279 goto Lyes;
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280
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281 case TY.Tchar:
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282 case TY.Tuns8:
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283 //printf("value = %llu %llu\n", (dinteger_t)(unsigned char)value, value);
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284 if (cast(ubyte)value != value)
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285 goto Lno;
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286 goto Lyes;
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287
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288 case TY.Tint16:
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289 if (cast(short)value != value)
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290 goto Lno;
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291 goto Lyes;
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292
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293 case TY.Tuns16:
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294 if (cast(ushort)value != value)
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295 goto Lno;
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296 goto Lyes;
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297
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298 case TY.Tint32:
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299 if (ty == TY.Tuns32) {
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300 ;
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301 }
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302 else if (cast(int)value != value) {
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303 goto Lno;
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304 }
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305 goto Lyes;
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306
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307 case TY.Tuns32:
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308 if (ty == TY.Tint32) {
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309 } else if (cast(uint)value != value) {
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310 goto Lno;
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311 }
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312 goto Lyes;
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313
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314 case TY.Tdchar:
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315 if (value > 0x10FFFF) {
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316 goto Lno;
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317 }
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318 goto Lyes;
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319
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320 case TY.Twchar:
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321 if (cast(ushort)value != value) {
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322 goto Lno;
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323 }
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324 goto Lyes;
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325
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326 case TY.Tfloat32:
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327 {
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328 /*volatile*/ float f; ///
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329 if (type.isunsigned()) {
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330 f = cast(float)value;
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331 if (f != value) {
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332 goto Lno;
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333 }
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334 } else {
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335 f = cast(float)cast(long)value;
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336 if (f != cast(long)value) {
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337 goto Lno;
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338 }
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339 }
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340 goto Lyes;
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341 }
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342
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343 case TY.Tfloat64:
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344 {
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345 /*volatile*/ double f; ///
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346 if (type.isunsigned()) {
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347 f = cast(double)value;
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348 if (f != value)
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349 goto Lno;
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350 } else {
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351 f = cast(double)cast(long)value;
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352 if (f != cast(long)value)
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353 goto Lno;
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354 }
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355 goto Lyes;
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356 }
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357
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358 case TY.Tfloat80:
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359 {
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360 /*volatile*/ real f; ///
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361 if (type.isunsigned()) {
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362 f = cast(real)value;
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363 if (f != value)
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364 goto Lno;
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365 } else {
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366 f = cast(real)cast(long)value;
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367 if (f != cast(long)value)
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368 goto Lno;
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369 }
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370 goto Lyes;
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371 }
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372
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373 case TY.Tpointer:
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374 //printf("type = %s\n", type.toBasetype().toChars());
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375 //printf("t = %s\n", t.toBasetype().toChars());
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376 if (ty == TY.Tpointer && type.toBasetype().nextOf().ty == t.toBasetype().nextOf().ty)
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377 {
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378 /* Allow things like:
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379 * const char* P = cast(char *)3;
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380 * char* q = P;
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381 */
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382 goto Lyes;
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383 }
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384 break;
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385
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386 default:
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387 break; ///
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388 }
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389
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390 return Expression.implicitConvTo(t);
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391
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392 Lyes:
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393 //printf("MATCHconvert\n");
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394 return MATCH.MATCHconvert;
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395
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396 Lno:
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397 //printf("MATCHnomatch\n");
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398 return MATCH.MATCHnomatch;
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399 }
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400
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401 void toCBuffer(OutBuffer buf, HdrGenState* hgs)
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402 {
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403 long v = toInteger();
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404
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405 if (type)
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406 {
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407 Type t = type;
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408
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409 L1:
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410 switch (t.ty)
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411 {
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412 case TY.Tenum:
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413 {
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414 TypeEnum te = cast(TypeEnum)t;
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415 buf.printf("cast(%s)", te.sym.toChars());
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416 t = te.sym.memtype;
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417 goto L1;
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418 }
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419
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420 case TY.Ttypedef:
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421 {
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422 TypeTypedef tt = cast(TypeTypedef)t;
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423 buf.printf("cast(%s)", tt.sym.toChars());
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424 t = tt.sym.basetype;
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425 goto L1;
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426 }
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427
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428 case TY.Twchar: // BUG: need to cast(wchar)
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429 case TY.Tdchar: // BUG: need to cast(dchar)
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430 if (cast(ulong)v > 0xFF)
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431 {
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432 buf.printf("'\\U%08x'", v);
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433 break;
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434 }
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435 case TY.Tchar:
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436 if (v == '\'')
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437 buf.writestring("'\\''");
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438 else if (isprint(cast(int)v) && v != '\\')
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439 buf.printf("'%c'", cast(int)v);
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440 else
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441 buf.printf("'\\x%02x'", cast(int)v);
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442 break;
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443
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444 case TY.Tint8:
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445 buf.writestring("cast(byte)");
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446 goto L2;
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447
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448 case TY.Tint16:
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449 buf.writestring("cast(short)");
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450 goto L2;
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451
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452 case TY.Tint32:
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453 L2:
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454 buf.printf("%d", cast(int)v);
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455 break;
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456
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457 case TY.Tuns8:
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458 buf.writestring("cast(ubyte)");
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459 goto L3;
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460
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461 case TY.Tuns16:
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462 buf.writestring("cast(ushort)");
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463 goto L3;
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464
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465 case TY.Tuns32:
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466 L3:
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467 buf.printf("%du", cast(uint)v);
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468 break;
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469
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470 case TY.Tint64:
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471 buf.printf("%jdL", v);
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472 break;
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473
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474 case TY.Tuns64:
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475 L4:
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476 buf.printf("%juLU", v);
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477 break;
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478
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479 case TY.Tbit:
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480 case TY.Tbool:
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481 buf.writestring(v ? "true" : "false");
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482 break;
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483
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484 case TY.Tpointer:
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485 buf.writestring("cast(");
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486 buf.writestring(t.toChars());
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487 buf.writeByte(')');
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488 if (PTRSIZE == 4)
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489 goto L3;
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490 else if (PTRSIZE == 8)
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491 goto L4;
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492 else
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493 assert(0);
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494
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495 default:
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496 /* This can happen if errors, such as
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497 * the type is painted on like in fromConstInitializer().
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498 */
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499 if (!global.errors)
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500 {
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501 debug {
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502 writef("%s\n", t.toChars());
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503 }
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504 assert(0);
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505 }
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506 break;
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507 }
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508 }
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509 else if (v & 0x8000000000000000L)
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510 buf.printf("0x%jx", v);
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511 else
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512 buf.printf("%jd", v);
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513 }
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514
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515 void toMangleBuffer(OutBuffer buf)
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516 {
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517 assert(false);
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518 }
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519
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520 Expression toLvalue(Scope sc, Expression e)
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521 {
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522 if (!e)
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523 e = this;
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524 else if (!loc.filename)
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525 loc = e.loc;
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526 e.error("constant %s is not an lvalue", e.toChars());
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527 return this;
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528 }
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529
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530 elem* toElem(IRState* irs)
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531 {
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532 elem* e = el_long(type.totym(), value);
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533 el_setLoc(e,loc);
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534 return e;
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535 }
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536
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537 dt_t** toDt(dt_t** pdt)
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538 {
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539 //printf("IntegerExp.toDt() %d\n", op);
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540 uint sz = cast(uint)type.size();
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541 if (value == 0)
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542 pdt = dtnzeros(pdt, sz);
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543 else
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544 pdt = dtnbytes(pdt, sz, cast(char*)&value);
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545
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546 return pdt;
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547 }
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548 }
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549
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