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/* $OpenBSD: yylex.c,v 1.6 2015/11/19 19:43:40 tedu Exp $ */
/* yylex - scanner front-end for flex */
/* Copyright (c) 1990 The Regents of the University of California. */
/* All rights reserved. */
/* This code is derived from software contributed to Berkeley by */
/* Vern Paxson. */
/* The United States Government has rights in this work pursuant */
/* to contract no. DE-AC03-76SF00098 between the United States */
/* Department of Energy and the University of California. */
/* This file is part of flex. */
/* Redistribution and use in source and binary forms, with or without */
/* modification, are permitted provided that the following conditions */
/* are met: */
/* 1. Redistributions of source code must retain the above copyright */
/* notice, this list of conditions and the following disclaimer. */
/* 2. Redistributions in binary form must reproduce the above copyright */
/* notice, this list of conditions and the following disclaimer in the */
/* documentation and/or other materials provided with the distribution. */
/* Neither the name of the University nor the names of its contributors */
/* may be used to endorse or promote products derived from this software */
/* without specific prior written permission. */
/* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR */
/* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED */
/* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR */
/* PURPOSE. */
#include <ctype.h>
#include "flexdef.h"
#include "parse.h"
/* yylex - scan for a regular expression token */
int yylex ()
{
int toktype;
static int beglin = false;
extern char *yytext;
if (eofseen)
toktype = EOF;
else
toktype = flexscan ();
if (toktype == EOF || toktype == 0) {
eofseen = 1;
if (sectnum == 1) {
synerr (_("premature EOF"));
sectnum = 2;
toktype = SECTEND;
}
else
toktype = 0;
}
if (trace) {
if (beglin) {
fprintf (stderr, "%d\t", num_rules + 1);
beglin = 0;
}
switch (toktype) {
case '<':
case '>':
case '^':
case '$':
case '"':
case '[':
case ']':
case '{':
case '}':
case '|':
case '(':
case ')':
case '-':
case '/':
case '\\':
case '?':
case '.':
case '*':
case '+':
case ',':
(void) putc (toktype, stderr);
break;
case '\n':
(void) putc ('\n', stderr);
if (sectnum == 2)
beglin = 1;
break;
case SCDECL:
fputs ("%s", stderr);
break;
case XSCDECL:
fputs ("%x", stderr);
break;
case SECTEND:
fputs ("%%\n", stderr);
/* We set beglin to be true so we'll start
* writing out numbers as we echo rules.
* flexscan() has already assigned sectnum.
*/
if (sectnum == 2)
beglin = 1;
break;
case NAME:
fprintf (stderr, "'%s'", nmstr);
break;
case CHAR:
switch (yylval) {
case '<':
case '>':
case '^':
case '$':
case '"':
case '[':
case ']':
case '{':
case '}':
case '|':
case '(':
case ')':
case '-':
case '/':
case '\\':
case '?':
case '.':
case '*':
case '+':
case ',':
fprintf (stderr, "\\%c", yylval);
break;
default:
if (!isascii (yylval) || !isprint (yylval))
fprintf (stderr,
"\\%.3o",
(unsigned int) yylval);
else
(void) putc (yylval, stderr);
break;
}
break;
case NUMBER:
fprintf (stderr, "%d", yylval);
break;
case PREVCCL:
fprintf (stderr, "[%d]", yylval);
break;
case EOF_OP:
fprintf (stderr, "<<EOF>>");
break;
case OPTION_OP:
fprintf (stderr, "%s ", yytext);
break;
case OPT_OUTFILE:
case OPT_PREFIX:
case CCE_ALNUM:
case CCE_ALPHA:
case CCE_BLANK:
case CCE_CNTRL:
case CCE_DIGIT:
case CCE_GRAPH:
case CCE_LOWER:
case CCE_PRINT:
case CCE_PUNCT:
case CCE_SPACE:
case CCE_UPPER:
case CCE_XDIGIT:
fprintf (stderr, "%s", yytext);
break;
case 0:
fprintf (stderr, _("End Marker\n"));
break;
default:
fprintf (stderr,
_
("*Something Weird* - tok: %d val: %d\n"),
toktype, yylval);
break;
}
}
return toktype;
}
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