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115 lines
2.6 KiB
Plaintext
115 lines
2.6 KiB
Plaintext
%option nounput noinput
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%{
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/* $OpenBSD: tokenizer.l,v 1.8 2012/04/12 17:00:11 espie Exp $ */
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/*
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* Copyright (c) 2004 Marc Espie <espie@cvs.openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* $FreeBSD$
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*/
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#include "parser.h"
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#include <assert.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <stdint.h>
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#include <limits.h>
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extern int mimic_gnu;
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extern int32_t yylval;
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int32_t number(void);
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int32_t parse_radix(void);
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extern int yylex(void);
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#define YY_DECL int yylex(void)
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%}
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delim [ \t\n]
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ws {delim}+
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hex 0[xX][0-9a-fA-F]+
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oct 0[0-7]*
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dec [1-9][0-9]*
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radix 0[rR][0-9]+:[0-9a-zA-Z]+
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%%
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{ws} {/* just skip it */}
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{hex}|{oct}|{dec} { yylval = number(); return(NUMBER); }
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{radix} { if (mimic_gnu) {
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yylval = parse_radix(); return(NUMBER);
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} else {
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return(ERROR);
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}
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}
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"<=" { return(LE); }
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">=" { return(GE); }
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"<<" { return(LSHIFT); }
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">>" { return(RSHIFT); }
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"==" { return(EQ); }
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"!=" { return(NE); }
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"&&" { return(LAND); }
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"||" { return(LOR); }
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"**" { if (mimic_gnu) { return (EXPONENT); } }
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. { return yytext[0]; }
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%%
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int32_t
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number(void)
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{
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long l;
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errno = 0;
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l = strtol(yytext, NULL, 0);
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if (((l == LONG_MAX || l == LONG_MIN) && errno == ERANGE) ||
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l > INT32_MAX || l < INT32_MIN) {
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fprintf(stderr, "m4: numeric overflow in expr: %s\n", yytext);
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}
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return l;
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}
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int32_t
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parse_radix(void)
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{
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long base;
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char *next;
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long l;
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int d;
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l = 0;
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base = strtol(yytext+2, &next, 0);
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if (base > 36 || next == NULL) {
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fprintf(stderr, "m4: error in number %s\n", yytext);
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} else {
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next++;
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while (*next != 0) {
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if (*next >= '0' && *next <= '9')
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d = *next - '0';
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else if (*next >= 'a' && *next <= 'z')
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d = *next - 'a' + 10;
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else {
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assert(*next >= 'A' && *next <= 'Z');
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d = *next - 'A' + 10;
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}
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if (d >= base) {
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fprintf(stderr,
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"m4: error in number %s\n", yytext);
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return 0;
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}
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l = base * l + d;
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next++;
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}
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}
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return l;
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}
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