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/* Copyright (C) 2019 C. McEnroe <june@causal.agency>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
%option noinput
%option nounput
%{
#include <stdint.h>
static uint64_t parseInt(uint64_t base, const char *str) {
uint64_t num = 0;
for (const char *ch = str; *ch; ++ch) {
if (*ch == '_') continue;
num *= base;
if (*ch >= '0' && *ch <= '9') num += *ch - '0';
if (*ch >= 'A' && *ch <= 'F') num += 0xA + *ch - 'A';
if (*ch >= 'a' && *ch <= 'f') num += 0xA + *ch - 'a';
}
return num;
}
%}
%%
[ \t\n] ;
0b[01_]+ {
yylval = parseInt(2, &yytext[2]);
return Int;
}
0[0-7_]+ {
yylval = parseInt(8, &yytext[1]);
return Int;
}
[0-9][0-9_]* {
yylval = parseInt(10, yytext);
return Int;
}
0x[0-9A-Fa-f_]+ {
yylval = parseInt(16, &yytext[2]);
return Int;
}
'.' {
yylval = yytext[1];
return Int;
}
"<<" return Shl;
">>" return Shr;
"->>" return Sar;
. return yytext[0];
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