Changeset f6582252 for src/Parser
- Timestamp:
- Jul 11, 2020, 6:37:01 PM (4 years ago)
- Branches:
- ADT, arm-eh, ast-experimental, enum, forall-pointer-decay, jacob/cs343-translation, master, new-ast, new-ast-unique-expr, pthread-emulation, qualifiedEnum
- Children:
- 9f350c4
- Parents:
- 7d9bbef
- File:
-
- 1 edited
-
src/Parser/ExpressionNode.cc (modified) (6 diffs)
Legend:
- Unmodified
- Added
- Removed
-
src/Parser/ExpressionNode.cc
r7d9bbef rf6582252 10 10 // Created On : Sat May 16 13:17:07 2015 11 11 // Last Modified By : Peter A. Buhr 12 // Last Modified On : Wed Dec 18 21:14:58 201913 // Update Count : 98112 // Last Modified On : Sat Jul 11 16:44:49 2020 13 // Update Count : 1034 14 14 // 15 15 … … 85 85 } // if 86 86 // remove "lL" for these cases because it may not imply long 87 str.erase( posn ); // remove length 87 str.erase( posn ); // remove length suffix and "uU" 88 88 } // lnthSuffix 89 89 … … 108 108 } // valueToType 109 109 110 static void scanbin( string & str, unsigned long long int & v ) { 111 v = 0; 112 size_t last = str.length() - 1; // last subscript of constant 113 for ( unsigned int i = 2;; ) { // ignore prefix 114 if ( str[i] == '1' ) v |= 1; 115 i += 1; 116 if ( i == last - 1 || (str[i] != '0' && str[i] != '1') ) break; 117 v <<= 1; 118 } // for 119 } // scanbin 120 110 121 Expression * build_constantInteger( string & str ) { 111 122 static const BasicType::Kind kind[2][6] = { 112 123 // short (h) must be before char (hh) because shorter type has the longer suffix 113 { BasicType::ShortSignedInt, BasicType::SignedChar, BasicType::SignedInt, BasicType::LongSignedInt, BasicType::LongLongSignedInt, BasicType::SignedInt128, },114 { BasicType::ShortUnsignedInt, BasicType::UnsignedChar, BasicType::UnsignedInt, BasicType::LongUnsignedInt, BasicType::LongLongUnsignedInt, BasicType::UnsignedInt128, },124 { BasicType::ShortSignedInt, BasicType::SignedChar, BasicType::SignedInt, BasicType::LongSignedInt, BasicType::LongLongSignedInt, /* BasicType::SignedInt128 */ BasicType::LongLongSignedInt, }, 125 { BasicType::ShortUnsignedInt, BasicType::UnsignedChar, BasicType::UnsignedInt, BasicType::LongUnsignedInt, BasicType::LongLongUnsignedInt, /* BasicType::UnsignedInt128 */ BasicType::LongLongUnsignedInt, }, 115 126 }; 116 127 … … 120 131 }; // lnthsInt 121 132 122 unsigned long long int v; // converted integral value 123 size_t last = str.length() - 1; // last subscript of constant 124 Expression * ret; 125 //string fred( str ); 133 string str2( "0x0" ); 134 unsigned long long int v, v2 = 0; // converted integral value 135 Expression * ret, * ret2; 126 136 127 137 int type = -1; // 0 => short, 1 => char, 2 => int, 3 => long int, 4 => long long int, 5 => int128 … … 139 149 } // if 140 150 151 string::size_type posn; 152 153 // 'u' can appear before or after length suffix 154 if ( str.find_last_of( "uU" ) != string::npos ) Unsigned = true; 155 156 if ( isdigit( str[str.length() - 1] ) ) { // no suffix ? 157 lnthSuffix( str, type, ltype ); // could have length suffix 158 if ( type == 5 && Unsigned ) str.erase( str.length() - 1 ); // L128 and terminating "uU" ? 159 } else { 160 // At least one digit in integer constant, so safe to backup while looking for suffix. 161 162 posn = str.find_last_of( "pP" ); // pointer value 163 if ( posn != string::npos ) { ltype = 5; str.erase( posn, 1 ); goto FINI; } 164 165 posn = str.find_last_of( "zZ" ); // size_t 166 if ( posn != string::npos ) { Unsigned = true; type = 2; ltype = 4; str.erase( posn, 1 ); goto FINI; } 167 168 posn = str.rfind( "hh" ); // char 169 if ( posn != string::npos ) { type = 1; str.erase( posn, 2 ); goto FINI; } 170 171 posn = str.rfind( "HH" ); // char 172 if ( posn != string::npos ) { type = 1; str.erase( posn, 2 ); goto FINI; } 173 174 posn = str.find_last_of( "hH" ); // short 175 if ( posn != string::npos ) { type = 0; str.erase( posn, 1 ); goto FINI; } 176 177 posn = str.find_last_of( "nN" ); // int (natural number) 178 if ( posn != string::npos ) { type = 2; str.erase( posn, 1 ); goto FINI; } 179 180 if ( str.rfind( "ll" ) != string::npos || str.rfind( "LL" ) != string::npos ) { type = 4; goto FINI; } 181 182 lnthSuffix( str, type, ltype ); // must be after check for "ll" 183 FINI: ; 184 } // if 185 141 186 // Cannot be just "0"/"1"; sscanf stops at the suffix, if any; value goes over the wall => always generate 142 187 143 188 if ( str[0] == '0' ) { // radix character ? 144 189 dec = false; 145 190 if ( checkX( str[1] ) ) { // hex constant ? 146 sscanf( (char *)str.c_str(), "%llx", &v ); 191 if ( type < 5 ) { // not L128 ? 192 sscanf( (char *)str.c_str(), "%llx", &v ); 193 } else { // hex int128 constant 194 unsigned int len = str.length(); 195 if ( len > (2 + 16 + 16) ) SemanticError( yylloc, "128-bit hexadecimal constant to large " + str ); 196 if ( len <= (2 + 16) ) goto FHEX1; // hex digits < 2^64 197 str2 = "0x" + str.substr( len - 16 ); 198 sscanf( (char *)str2.c_str(), "%llx", &v2 ); 199 str = str.substr( 0, len - 16 ); 200 FHEX1: ; 201 sscanf( (char *)str.c_str(), "%llx", &v ); 202 } // if 147 203 //printf( "%llx %llu\n", v, v ); 148 204 } else if ( checkB( str[1] ) ) { // binary constant ? 149 v = 0; // compute value 150 for ( unsigned int i = 2;; ) { // ignore prefix 151 if ( str[i] == '1' ) v |= 1; 152 i += 1; 153 if ( i == last - 1 || (str[i] != '0' && str[i] != '1') ) break; 154 v <<= 1; 155 } // for 205 unsigned int len = str.length(); 206 if ( type == 5 && len > 2 + 64 ) { 207 if ( len > 2 + 64 + 64 ) SemanticError( yylloc, "128-bit binary constant to large " + str ); 208 str2 = "0b" + str.substr( len - 64 ); 209 str = str.substr( 0, len - 64 ); 210 scanbin( str2, v2 ); 211 } // if 212 scanbin( str, v ); 156 213 //printf( "%#llx %llu\n", v, v ); 157 214 } else { // octal constant 158 sscanf( (char *)str.c_str(), "%llo", &v ); 215 if ( type < 5 ) { // not L128 ? 216 sscanf( (char *)str.c_str(), "%llo", &v ); 217 } else { // octal int128 constant 218 unsigned int len = str.length(); 219 char buf[32]; 220 __int128 val = v; 221 222 if ( len > 1 + 43 || (len == 1 + 43 && str[0] > '3') ) SemanticError( yylloc, "128-bit octal constant to large " + str ); 223 if ( len <= 1 + 21 ) { // value < 21 octal digitis 224 sscanf( (char *)str.c_str(), "%llo", &v ); // leave value in octal 225 } else { 226 sscanf( &str[len - 21], "%llo", &v ); 227 val = v; // store bits 228 str[len - 21] ='\0'; // shorten string 229 sscanf( &str[len == 43 ? 1 : 0], "%llo", &v ); 230 val |= (__int128)v << 63; // store bits 231 if ( len == 1 + 43 ) { // most significant 2 bits ? 232 str[2] = '\0'; // shorten string 233 sscanf( &str[1], "%llo", &v ); // process most significant 2 bits 234 val |= (__int128)v << 126; // store bits 235 } // if 236 v = val >> 64; v2 = (uint64_t)val; // replace octal constant with 2 hex constants 237 sprintf( buf, "%#llx", v2 ); 238 str2 = buf; 239 sprintf( buf, "%#llx", v ); 240 str = buf; 241 } // if 242 } // if 159 243 //printf( "%#llo %llu\n", v, v ); 160 244 } // if 161 245 } else { // decimal constant ? 162 sscanf( (char *)str.c_str(), "%llu", &v ); 246 if ( type < 5 ) { // not L128 ? 247 sscanf( (char *)str.c_str(), "%llu", &v ); 248 } else { // decimal int128 constant 249 #define P10_UINT64 10'000'000'000'000'000'000ULL // 19 zeroes 250 unsigned int len = str.length(); 251 char buf[32]; 252 __int128 val = v; 253 254 if ( str.length() == 39 && str > (Unsigned ? "340282366920938463463374607431768211455" : "170141183460469231731687303715884105727") ) 255 SemanticError( yylloc, "128-bit decimal constant to large " + str ); 256 if ( len <= 19 ) { // value < 19 decimal digitis 257 sscanf( (char *)str.c_str(), "%llu", &v ); // leave value in decimal 258 } else { 259 sscanf( &str[len - 19], "%llu", &v ); 260 val = v; // store bits 261 str[len - 19] ='\0'; // shorten string 262 sscanf( &str[len == 39 ? 1 : 0], "%llu", &v ); 263 val += (__int128)v * (__int128)P10_UINT64; // store bits 264 if ( len == 39 ) { // most significant 2 bits ? 265 str[1] = '\0'; // shorten string 266 sscanf( &str[0], "%llu", &v ); // process most significant 2 bits 267 val += (__int128)v * (__int128)P10_UINT64 * (__int128)P10_UINT64; // store bits 268 } // if 269 v = val >> 64; v2 = (uint64_t)val; // replace decimal constant with 2 hex constants 270 sprintf( buf, "%#llx", v2 ); 271 str2 = buf; 272 sprintf( buf, "%#llx", v ); 273 str = buf; 274 } // if 275 } // if 163 276 //printf( "%llu\n", v ); 164 277 } // if 165 278 166 string::size_type posn; 167 168 if ( isdigit( str[last] ) ) { // no suffix ? 169 lnthSuffix( str, type, ltype ); // could have length suffix 170 if ( type == -1 ) { // no suffix 171 valueToType( v, dec, type, Unsigned ); 172 } // if 173 } else { 174 // At least one digit in integer constant, so safe to backup while looking for suffix. 175 176 posn = str.find_last_of( "pP" ); 177 if ( posn != string::npos ) { valueToType( v, dec, type, Unsigned ); ltype = 5; str.erase( posn, 1 ); goto FINI; } 178 179 posn = str.find_last_of( "zZ" ); 180 if ( posn != string::npos ) { Unsigned = true; type = 2; ltype = 4; str.erase( posn, 1 ); goto FINI; } 181 182 // 'u' can appear before or after length suffix 183 if ( str.find_last_of( "uU" ) != string::npos ) Unsigned = true; 184 185 posn = str.rfind( "hh" ); 186 if ( posn != string::npos ) { type = 1; str.erase( posn, 2 ); goto FINI; } 187 188 posn = str.rfind( "HH" ); 189 if ( posn != string::npos ) { type = 1; str.erase( posn, 2 ); goto FINI; } 190 191 posn = str.find_last_of( "hH" ); 192 if ( posn != string::npos ) { type = 0; str.erase( posn, 1 ); goto FINI; } 193 194 posn = str.find_last_of( "nN" ); 195 if ( posn != string::npos ) { type = 2; str.erase( posn, 1 ); goto FINI; } 196 197 if ( str.rfind( "ll" ) != string::npos || str.rfind( "LL" ) != string::npos ) { type = 4; goto FINI; } 198 199 lnthSuffix( str, type, ltype ); // must be after check for "ll" 200 if ( type == -1 ) { // only 'u' suffix ? 201 valueToType( v, dec, type, Unsigned ); 202 } // if 203 FINI: ; 204 } // if 279 if ( type == -1 ) { // no suffix => determine type from value size 280 valueToType( v, dec, type, Unsigned ); 281 } // if 282 /* printf( "%s %llo %s %llo\n", str.c_str(), v, str2.c_str(), v2 ); */ 205 283 206 284 //if ( !( 0 <= type && type <= 6 ) ) { printf( "%s %lu %d %s\n", fred.c_str(), fred.length(), type, str.c_str() ); } … … 214 292 } else if ( ltype != -1 ) { // explicit length ? 215 293 if ( ltype == 6 ) { // int128, (int128)constant 216 ret = new CastExpr( ret, new BasicType( Type::Qualifiers(), kind[Unsigned][type] ), false ); 294 // ret = new CastExpr( ret, new BasicType( Type::Qualifiers(), kind[Unsigned][type] ), false ); 295 ret2 = new ConstantExpr( Constant( new BasicType( noQualifiers, BasicType::LongLongSignedInt ), str2, v2 ) ); 296 ret = build_compoundLiteral( DeclarationNode::newBasicType( DeclarationNode::Int128 )->addType( DeclarationNode::newSignedNess( DeclarationNode::Unsigned ) ), 297 new InitializerNode( (InitializerNode *)(new InitializerNode( new ExpressionNode( v2 == 0 ? ret2 : ret ) ))->set_last( new InitializerNode( new ExpressionNode( v2 == 0 ? ret : ret2 ) ) ), true ) ); 217 298 } else { // explicit length, (length_type)constant 218 299 ret = new CastExpr( ret, new TypeInstType( Type::Qualifiers(), lnthsInt[Unsigned][ltype], false ), false );
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