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%{ |
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/* $OpenBSD: tokenizer.l,v 1.10 2017/06/17 01:55:16 bcallah 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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#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 void m4_warnx(const char *, ...); |
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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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%} |
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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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%option noyywrap |
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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() |
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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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✗✓✗✗
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l > INT32_MAX || l < INT32_MIN) |
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✗✓ |
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m4_warnx("numeric overflow in expr: %s", yytext); |
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return l; |
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} |
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int32_t |
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parse_radix() |
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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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m4_warnx("error in number %s", 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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m4_warnx("error in number %s", 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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