1032 lines
26 KiB
C
1032 lines
26 KiB
C
/* $NetBSD: scan.l,v 1.3 2010/04/07 16:14:07 christos Exp $ */
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/* scan.l - scanner for flex input -*-C-*- */
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%{
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/* Copyright (c) 1990 The Regents of the University of California. */
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/* All rights reserved. */
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/* This code is derived from software contributed to Berkeley by */
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/* Vern Paxson. */
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/* The United States Government has rights in this work pursuant */
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/* to contract no. DE-AC03-76SF00098 between the United States */
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/* Department of Energy and the University of California. */
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/* This file is part of flex. */
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/* Redistribution and use in source and binary forms, with or without */
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/* modification, are permitted provided that the following conditions */
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/* are met: */
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/* 1. Redistributions of source code must retain the above copyright */
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/* notice, this list of conditions and the following disclaimer. */
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/* 2. Redistributions in binary form must reproduce the above copyright */
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/* notice, this list of conditions and the following disclaimer in the */
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/* documentation and/or other materials provided with the distribution. */
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/* Neither the name of the University nor the names of its contributors */
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/* may be used to endorse or promote products derived from this software */
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/* without specific prior written permission. */
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/* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR */
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/* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED */
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/* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR */
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/* PURPOSE. */
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#include "flexdef.h"
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#include "parse.h"
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extern bool tablesverify, tablesext;
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extern int trlcontxt; /* Set in parse.y for each rule. */
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extern const char *escaped_qstart, *escaped_qend;
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#define ACTION_ECHO add_action( yytext )
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#define ACTION_IFDEF(def, should_define) \
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{ \
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if ( should_define ) \
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action_define( def, 1 ); \
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}
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#define ACTION_ECHO_QSTART add_action (escaped_qstart)
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#define ACTION_ECHO_QEND add_action (escaped_qend)
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#define ACTION_M4_IFDEF(def, should_define) \
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do{ \
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if ( should_define ) \
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buf_m4_define( &m4defs_buf, def, NULL);\
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else \
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buf_m4_undefine( &m4defs_buf, def);\
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} while(0)
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#define MARK_END_OF_PROLOG mark_prolog();
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#define YY_DECL \
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int flexscan()
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#define RETURNCHAR \
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yylval = (unsigned char) yytext[0]; \
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return CHAR;
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#define RETURNNAME \
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if(yyleng < MAXLINE) \
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{ \
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strlcpy( nmstr, yytext, sizeof(nmstr) ); \
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} \
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else \
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{ \
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synerr(_("Input line too long\n")); \
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FLEX_EXIT(EXIT_FAILURE); \
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} \
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return NAME;
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#define PUT_BACK_STRING(str, start) \
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for ( i = strlen( str ) - 1; i >= start; --i ) \
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unput((str)[i])
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#define CHECK_RE_JECT(str) \
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if ( all_upper( str ) ) \
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reject = true
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#define CHECK_YYMORE(str) \
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if ( all_lower( str ) ) \
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yymore_used = true;
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#define YY_USER_INIT \
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if ( getenv("POSIXLY_CORRECT") ) \
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posix_compat = true;
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%}
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%option caseless nodefault stack noyy_top_state
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%option nostdinit
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%x SECT2 SECT2PROLOG SECT3 CODEBLOCK PICKUPDEF SC CARETISBOL NUM QUOTE
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%x FIRSTCCL CCL ACTION RECOVER COMMENT ACTION_STRING PERCENT_BRACE_ACTION
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%x OPTION LINEDIR CODEBLOCK_MATCH_BRACE
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%x GROUP_WITH_PARAMS
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%x GROUP_MINUS_PARAMS
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%x EXTENDED_COMMENT
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%x COMMENT_DISCARD
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WS [[:blank:]]+
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OPTWS [[:blank:]]*
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NOT_WS [^[:blank:]\r\n]
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NL \r?\n
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NAME ([[:alpha:]_][[:alnum:]_-]*)
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NOT_NAME [^[:alpha:]_*\n]+
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SCNAME {NAME}
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ESCSEQ (\\([^\n]|[0-7]{1,3}|x[[:xdigit:]]{1,2}))
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FIRST_CCL_CHAR ([^\\\n]|{ESCSEQ})
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CCL_CHAR ([^\\\n\]]|{ESCSEQ})
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CCL_EXPR ("[:"^?[[:alpha:]]+":]")
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LEXOPT [aceknopr]
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M4QSTART "[["
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M4QEND "]]"
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%%
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static int bracelevel, didadef, indented_code;
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static int doing_rule_action = false;
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static int option_sense;
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int doing_codeblock = false;
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int i, brace_depth=0, brace_start_line=0;
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Char nmdef[MAXLINE];
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<INITIAL>{
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^{WS} indented_code = true; BEGIN(CODEBLOCK);
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^"/*" ACTION_ECHO; yy_push_state( COMMENT );
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^#{OPTWS}line{WS} yy_push_state( LINEDIR );
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^"%s"{NAME}? return SCDECL;
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^"%x"{NAME}? return XSCDECL;
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^"%{".*{NL} {
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++linenum;
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line_directive_out( (FILE *) 0, 1 );
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indented_code = false;
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BEGIN(CODEBLOCK);
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}
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^"%top"[[:blank:]]*"{"[[:blank:]]*{NL} {
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brace_start_line = linenum;
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++linenum;
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buf_linedir( &top_buf, infilename?infilename:"<stdin>", linenum);
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brace_depth = 1;
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yy_push_state(CODEBLOCK_MATCH_BRACE);
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}
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^"%top".* synerr( _("malformed '%top' directive") );
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{WS} /* discard */
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^"%%".* {
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sectnum = 2;
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bracelevel = 0;
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mark_defs1();
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line_directive_out( (FILE *) 0, 1 );
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BEGIN(SECT2PROLOG);
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return SECTEND;
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}
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^"%pointer".*{NL} yytext_is_array = false; ++linenum;
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^"%array".*{NL} yytext_is_array = true; ++linenum;
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^"%option" BEGIN(OPTION); return OPTION_OP;
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^"%"{LEXOPT}{OPTWS}[[:digit:]]*{OPTWS}{NL} ++linenum; /* ignore */
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^"%"{LEXOPT}{WS}.*{NL} ++linenum; /* ignore */
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/* xgettext: no-c-format */
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^"%"[^sxaceknopr{}].* synerr( _( "unrecognized '%' directive" ) );
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^{NAME} {
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if(yyleng < MAXLINE)
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{
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strlcpy( nmstr, yytext, sizeof(nmstr) );
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}
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else
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{
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synerr( _("Input line too long\n"));
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FLEX_EXIT(EXIT_FAILURE);
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}
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didadef = false;
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BEGIN(PICKUPDEF);
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}
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{SCNAME} RETURNNAME;
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^{OPTWS}{NL} ++linenum; /* allows blank lines in section 1 */
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{OPTWS}{NL} ACTION_ECHO; ++linenum; /* maybe end of comment line */
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}
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<COMMENT>{
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"*/" ACTION_ECHO; yy_pop_state();
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"*" ACTION_ECHO;
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{M4QSTART} ACTION_ECHO_QSTART;
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{M4QEND} ACTION_ECHO_QEND;
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[^*\n] ACTION_ECHO;
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{NL} ++linenum; ACTION_ECHO;
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}
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<COMMENT_DISCARD>{
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/* This is the same as COMMENT, but is discarded rather than output. */
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"*/" yy_pop_state();
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"*" ;
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[^*\n] ;
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{NL} ++linenum;
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}
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<EXTENDED_COMMENT>{
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")" yy_pop_state();
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[^\n\)]+ ;
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{NL} ++linenum;
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}
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<LINEDIR>{
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\n yy_pop_state();
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[[:digit:]]+ linenum = myctoi( yytext );
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\"[^"\n]*\" {
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flex_free( (void *) infilename );
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infilename = copy_string( yytext + 1 );
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infilename[strlen( infilename ) - 1] = '\0';
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}
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. /* ignore spurious characters */
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}
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<CODEBLOCK>{
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^"%}".*{NL} ++linenum; BEGIN(INITIAL);
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{M4QSTART} ACTION_ECHO_QSTART;
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{M4QEND} ACTION_ECHO_QEND;
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. ACTION_ECHO;
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{NL} {
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++linenum;
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ACTION_ECHO;
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if ( indented_code )
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BEGIN(INITIAL);
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}
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}
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<CODEBLOCK_MATCH_BRACE>{
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"}" {
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if( --brace_depth == 0){
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/* TODO: Matched. */
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yy_pop_state();
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}else
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buf_strnappend(&top_buf, yytext, yyleng);
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}
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"{" {
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brace_depth++;
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buf_strnappend(&top_buf, yytext, yyleng);
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}
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{NL} {
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++linenum;
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buf_strnappend(&top_buf, yytext, yyleng);
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}
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{M4QSTART} buf_strnappend(&top_buf, escaped_qstart, strlen(escaped_qstart));
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{M4QEND} buf_strnappend(&top_buf, escaped_qend, strlen(escaped_qend));
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[^{}\r\n] {
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buf_strnappend(&top_buf, yytext, yyleng);
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}
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<<EOF>> {
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linenum = brace_start_line;
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synerr(_("Unmatched '{'"));
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yyterminate();
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}
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}
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<PICKUPDEF>{
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{WS} /* separates name and definition */
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{NOT_WS}[^\r\n]* {
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if(yyleng < MAXLINE)
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{
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strlcpy( (char *) nmdef, yytext, sizeof(nmdef) );
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}
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else
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{
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synerr( _("Input line too long\n"));
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FLEX_EXIT(EXIT_FAILURE);
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}
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/* Skip trailing whitespace. */
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for ( i = strlen( (char *) nmdef ) - 1;
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i >= 0 && (nmdef[i] == ' ' || nmdef[i] == '\t');
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--i )
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;
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nmdef[i + 1] = '\0';
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ndinstal( nmstr, nmdef );
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didadef = true;
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}
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{NL} {
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if ( ! didadef )
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synerr( _( "incomplete name definition" ) );
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BEGIN(INITIAL);
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++linenum;
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}
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}
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<OPTION>{
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{NL} ++linenum; BEGIN(INITIAL);
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{WS} option_sense = true;
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"=" return '=';
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no option_sense = ! option_sense;
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7bit csize = option_sense ? 128 : 256;
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8bit csize = option_sense ? 256 : 128;
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align long_align = option_sense;
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always-interactive {
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ACTION_M4_IFDEF( "M4""_YY_ALWAYS_INTERACTIVE", option_sense );
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interactive = option_sense;
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}
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array yytext_is_array = option_sense;
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ansi-definitions ansi_func_defs = option_sense;
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ansi-prototypes ansi_func_protos = option_sense;
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backup backing_up_report = option_sense;
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batch interactive = ! option_sense;
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bison-bridge bison_bridge_lval = option_sense;
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bison-locations { if((bison_bridge_lloc = option_sense))
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bison_bridge_lval = true;
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}
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"c++" C_plus_plus = option_sense;
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caseful|case-sensitive sf_set_case_ins(!option_sense);
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caseless|case-insensitive sf_set_case_ins(option_sense);
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debug ddebug = option_sense;
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default spprdflt = ! option_sense;
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ecs useecs = option_sense;
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fast {
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useecs = usemecs = false;
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use_read = fullspd = true;
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}
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full {
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useecs = usemecs = false;
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use_read = fulltbl = true;
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}
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input ACTION_IFDEF("YY_NO_INPUT", ! option_sense);
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interactive interactive = option_sense;
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lex-compat lex_compat = option_sense;
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posix-compat posix_compat = option_sense;
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main {
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ACTION_M4_IFDEF( "M4""_YY_MAIN", option_sense);
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/* Override yywrap */
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if( option_sense == true )
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do_yywrap = false;
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}
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meta-ecs usemecs = option_sense;
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never-interactive {
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ACTION_M4_IFDEF( "M4""_YY_NEVER_INTERACTIVE", option_sense );
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interactive = !option_sense;
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}
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perf-report performance_report += option_sense ? 1 : -1;
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pointer yytext_is_array = ! option_sense;
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read use_read = option_sense;
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reentrant reentrant = option_sense;
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reject reject_really_used = option_sense;
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stack ACTION_M4_IFDEF( "M4""_YY_STACK_USED", option_sense );
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stdinit do_stdinit = option_sense;
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stdout use_stdout = option_sense;
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unistd ACTION_IFDEF("YY_NO_UNISTD_H", ! option_sense);
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unput ACTION_M4_IFDEF("M4""_YY_NO_UNPUT", ! option_sense);
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verbose printstats = option_sense;
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warn nowarn = ! option_sense;
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yylineno do_yylineno = option_sense; ACTION_M4_IFDEF("M4""_YY_USE_LINENO", option_sense);
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yymore yymore_really_used = option_sense;
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yywrap do_yywrap = option_sense;
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yy_push_state ACTION_M4_IFDEF("M4""_YY_NO_PUSH_STATE", ! option_sense);
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yy_pop_state ACTION_M4_IFDEF("M4""_YY_NO_POP_STATE", ! option_sense);
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yy_top_state ACTION_M4_IFDEF("M4""_YY_NO_TOP_STATE", ! option_sense);
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yy_scan_buffer ACTION_M4_IFDEF("M4""_YY_NO_SCAN_BUFFER", ! option_sense);
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yy_scan_bytes ACTION_M4_IFDEF("M4""_YY_NO_SCAN_BYTES", ! option_sense);
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yy_scan_string ACTION_M4_IFDEF("M4""_YY_NO_SCAN_STRING", ! option_sense);
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yyalloc ACTION_M4_IFDEF("M4""_YY_NO_FLEX_ALLOC", ! option_sense);
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yyrealloc ACTION_M4_IFDEF("M4""_YY_NO_FLEX_REALLOC", ! option_sense);
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yyfree ACTION_M4_IFDEF("M4""_YY_NO_FLEX_FREE", ! option_sense);
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yyget_debug ACTION_M4_IFDEF("M4""_YY_NO_GET_DEBUG", ! option_sense);
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yyset_debug ACTION_M4_IFDEF("M4""_YY_NO_SET_DEBUG", ! option_sense);
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yyget_extra ACTION_M4_IFDEF("M4""_YY_NO_GET_EXTRA", ! option_sense);
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yyset_extra ACTION_M4_IFDEF("M4""_YY_NO_SET_EXTRA", ! option_sense);
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yyget_leng ACTION_M4_IFDEF("M4""_YY_NO_GET_LENG", ! option_sense);
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yyget_text ACTION_M4_IFDEF("M4""_YY_NO_GET_TEXT", ! option_sense);
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yyget_lineno ACTION_M4_IFDEF("M4""_YY_NO_GET_LINENO", ! option_sense);
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yyset_lineno ACTION_M4_IFDEF("M4""_YY_NO_SET_LINENO", ! option_sense);
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yyget_in ACTION_M4_IFDEF("M4""_YY_NO_GET_IN", ! option_sense);
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yyset_in ACTION_M4_IFDEF("M4""_YY_NO_SET_IN", ! option_sense);
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yyget_out ACTION_M4_IFDEF("M4""_YY_NO_GET_OUT", ! option_sense);
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yyset_out ACTION_M4_IFDEF("M4""_YY_NO_SET_OUT", ! option_sense);
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yyget_lval ACTION_M4_IFDEF("M4""_YY_NO_GET_LVAL", ! option_sense);
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yyset_lval ACTION_M4_IFDEF("M4""_YY_NO_SET_LVAL", ! option_sense);
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yyget_lloc ACTION_M4_IFDEF("M4""_YY_NO_GET_LLOC", ! option_sense);
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yyset_lloc ACTION_M4_IFDEF("M4""_YY_NO_SET_LLOC", ! option_sense);
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extra-type return OPT_EXTRA_TYPE;
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outfile return OPT_OUTFILE;
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prefix return OPT_PREFIX;
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yyclass return OPT_YYCLASS;
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header(-file)? return OPT_HEADER;
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tables-file return OPT_TABLES;
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tables-verify {
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tablesverify = option_sense;
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if(!tablesext && option_sense)
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tablesext = true;
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}
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\"[^"\n]*\" {
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if(yyleng-1 < MAXLINE)
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{
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strlcpy( nmstr, yytext + 1, sizeof(nmstr) );
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}
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else
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{
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synerr( _("Input line too long\n"));
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FLEX_EXIT(EXIT_FAILURE);
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}
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nmstr[strlen( nmstr ) - 1] = '\0';
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return NAME;
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}
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(([a-mo-z]|n[a-np-z])[[:alpha:]\-+]*)|. {
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format_synerr( _( "unrecognized %%option: %s" ),
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yytext );
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BEGIN(RECOVER);
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}
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}
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<RECOVER>.*{NL} ++linenum; BEGIN(INITIAL);
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<SECT2PROLOG>{
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^"%{".* ++bracelevel; yyless( 2 ); /* eat only %{ */
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^"%}".* --bracelevel; yyless( 2 ); /* eat only %} */
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^{WS}.* ACTION_ECHO; /* indented code in prolog */
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^{NOT_WS}.* { /* non-indented code */
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if ( bracelevel <= 0 )
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{ /* not in %{ ... %} */
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yyless( 0 ); /* put it all back */
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yy_set_bol( 1 );
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mark_prolog();
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BEGIN(SECT2);
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}
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else
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ACTION_ECHO;
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}
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. ACTION_ECHO;
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{NL} ++linenum; ACTION_ECHO;
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<<EOF>> {
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mark_prolog();
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sectnum = 0;
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yyterminate(); /* to stop the parser */
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}
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}
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<SECT2>{
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^{OPTWS}{NL} ++linenum; /* allow blank lines in section 2 */
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^{OPTWS}"%{" {
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|
indented_code = false;
|
|
doing_codeblock = true;
|
|
bracelevel = 1;
|
|
BEGIN(PERCENT_BRACE_ACTION);
|
|
}
|
|
|
|
^{OPTWS}"<" {
|
|
/* Allow "<" to appear in (?x) patterns. */
|
|
if (!sf_skip_ws())
|
|
BEGIN(SC);
|
|
return '<';
|
|
}
|
|
^{OPTWS}"^" return '^';
|
|
\" BEGIN(QUOTE); return '"';
|
|
"{"/[[:digit:]] {
|
|
BEGIN(NUM);
|
|
if ( lex_compat || posix_compat )
|
|
return BEGIN_REPEAT_POSIX;
|
|
else
|
|
return BEGIN_REPEAT_FLEX;
|
|
}
|
|
"$"/([[:blank:]]|{NL}) return '$';
|
|
|
|
{WS}"%{" {
|
|
bracelevel = 1;
|
|
BEGIN(PERCENT_BRACE_ACTION);
|
|
|
|
if ( in_rule )
|
|
{
|
|
doing_rule_action = true;
|
|
in_rule = false;
|
|
return '\n';
|
|
}
|
|
}
|
|
{WS}"|".*{NL} {
|
|
if (sf_skip_ws()){
|
|
/* We're in the middle of a (?x: ) pattern. */
|
|
/* Push back everything starting at the "|" */
|
|
size_t amt;
|
|
amt = strchr (yytext, '|') - yytext;
|
|
yyless(amt);
|
|
}
|
|
else {
|
|
continued_action = true;
|
|
++linenum;
|
|
return '\n';
|
|
}
|
|
}
|
|
|
|
^{WS}"/*" {
|
|
|
|
if (sf_skip_ws()){
|
|
/* We're in the middle of a (?x: ) pattern. */
|
|
yy_push_state(COMMENT_DISCARD);
|
|
}
|
|
else{
|
|
yyless( yyleng - 2 ); /* put back '/', '*' */
|
|
bracelevel = 0;
|
|
continued_action = false;
|
|
BEGIN(ACTION);
|
|
}
|
|
}
|
|
|
|
^{WS} /* allow indented rules */ ;
|
|
|
|
{WS} {
|
|
if (sf_skip_ws()){
|
|
/* We're in the middle of a (?x: ) pattern. */
|
|
}
|
|
else{
|
|
/* This rule is separate from the one below because
|
|
* otherwise we get variable trailing context, so
|
|
* we can't build the scanner using -{f,F}.
|
|
*/
|
|
bracelevel = 0;
|
|
continued_action = false;
|
|
BEGIN(ACTION);
|
|
|
|
if ( in_rule )
|
|
{
|
|
doing_rule_action = true;
|
|
in_rule = false;
|
|
return '\n';
|
|
}
|
|
}
|
|
}
|
|
|
|
{OPTWS}{NL} {
|
|
if (sf_skip_ws()){
|
|
/* We're in the middle of a (?x: ) pattern. */
|
|
++linenum;
|
|
}
|
|
else{
|
|
bracelevel = 0;
|
|
continued_action = false;
|
|
BEGIN(ACTION);
|
|
unput( '\n' ); /* so <ACTION> sees it */
|
|
|
|
if ( in_rule )
|
|
{
|
|
doing_rule_action = true;
|
|
in_rule = false;
|
|
return '\n';
|
|
}
|
|
}
|
|
}
|
|
|
|
^{OPTWS}"<<EOF>>" |
|
|
"<<EOF>>" return EOF_OP;
|
|
|
|
^"%%".* {
|
|
sectnum = 3;
|
|
BEGIN(SECT3);
|
|
outn("/* Begin user sect3 */");
|
|
yyterminate(); /* to stop the parser */
|
|
}
|
|
|
|
"["({FIRST_CCL_CHAR}|{CCL_EXPR})({CCL_CHAR}|{CCL_EXPR})* {
|
|
int cclval;
|
|
|
|
if(yyleng < MAXLINE)
|
|
{
|
|
strlcpy( nmstr, yytext, sizeof(nmstr) );
|
|
}
|
|
else
|
|
{
|
|
synerr( _("Input line too long\n"));
|
|
FLEX_EXIT(EXIT_FAILURE);
|
|
}
|
|
|
|
/* Check to see if we've already encountered this
|
|
* ccl.
|
|
*/
|
|
if (0 /* <--- This "0" effectively disables the reuse of a
|
|
* character class (purely based on its source text).
|
|
* The reason it was disabled is so yacc/bison can parse
|
|
* ccl operations, such as ccl difference and union.
|
|
*/
|
|
&& (cclval = ccllookup( (Char *) nmstr )) != 0 )
|
|
{
|
|
if ( input() != ']' )
|
|
synerr( _( "bad character class" ) );
|
|
|
|
yylval = cclval;
|
|
++cclreuse;
|
|
return PREVCCL;
|
|
}
|
|
else
|
|
{
|
|
/* We fudge a bit. We know that this ccl will
|
|
* soon be numbered as lastccl + 1 by cclinit.
|
|
*/
|
|
cclinstal( (Char *) nmstr, lastccl + 1 );
|
|
|
|
/* Push back everything but the leading bracket
|
|
* so the ccl can be rescanned.
|
|
*/
|
|
yyless( 1 );
|
|
|
|
BEGIN(FIRSTCCL);
|
|
return '[';
|
|
}
|
|
}
|
|
"{-}" return CCL_OP_DIFF;
|
|
"{+}" return CCL_OP_UNION;
|
|
|
|
|
|
/* Check for :space: at the end of the rule so we don't
|
|
* wrap the expanded regex in '(' ')' -- breaking trailing
|
|
* context.
|
|
*/
|
|
"{"{NAME}"}"[[:space:]]? {
|
|
register Char *nmdefptr;
|
|
int end_is_ws, end_ch;
|
|
|
|
end_ch = yytext[yyleng-1];
|
|
end_is_ws = end_ch != '}' ? 1 : 0;
|
|
|
|
if(yyleng-1 < MAXLINE)
|
|
{
|
|
strlcpy( nmstr, yytext + 1, sizeof(nmstr) );
|
|
}
|
|
else
|
|
{
|
|
synerr( _("Input line too long\n"));
|
|
FLEX_EXIT(EXIT_FAILURE);
|
|
}
|
|
nmstr[yyleng - 2 - end_is_ws] = '\0'; /* chop trailing brace */
|
|
|
|
if ( (nmdefptr = ndlookup( nmstr )) == 0 )
|
|
format_synerr(
|
|
_( "undefined definition {%s}" ),
|
|
nmstr );
|
|
|
|
else
|
|
{ /* push back name surrounded by ()'s */
|
|
int len = strlen( (char *) nmdefptr );
|
|
if (end_is_ws)
|
|
unput(end_ch);
|
|
|
|
if ( lex_compat || nmdefptr[0] == '^' ||
|
|
(len > 0 && nmdefptr[len - 1] == '$')
|
|
|| (end_is_ws && trlcontxt && !sf_skip_ws()))
|
|
{ /* don't use ()'s after all */
|
|
PUT_BACK_STRING((char *) nmdefptr, 0);
|
|
|
|
if ( nmdefptr[0] == '^' )
|
|
BEGIN(CARETISBOL);
|
|
}
|
|
|
|
else
|
|
{
|
|
unput(')');
|
|
PUT_BACK_STRING((char *) nmdefptr, 0);
|
|
unput('(');
|
|
}
|
|
}
|
|
}
|
|
|
|
"/*" {
|
|
if (sf_skip_ws())
|
|
yy_push_state(COMMENT_DISCARD);
|
|
else{
|
|
/* Push back the "*" and return "/" as usual. */
|
|
yyless(1);
|
|
return '/';
|
|
}
|
|
}
|
|
|
|
"(?#" {
|
|
if (lex_compat || posix_compat){
|
|
/* Push back the "?#" and treat it like a normal parens. */
|
|
yyless(1);
|
|
sf_push();
|
|
return '(';
|
|
}
|
|
else
|
|
yy_push_state(EXTENDED_COMMENT);
|
|
}
|
|
"(?" {
|
|
sf_push();
|
|
if (lex_compat || posix_compat)
|
|
/* Push back the "?" and treat it like a normal parens. */
|
|
yyless(1);
|
|
else
|
|
BEGIN(GROUP_WITH_PARAMS);
|
|
return '(';
|
|
}
|
|
"(" sf_push(); return '(';
|
|
")" sf_pop(); return ')';
|
|
|
|
[/|*+?.(){}] return (unsigned char) yytext[0];
|
|
. RETURNCHAR;
|
|
}
|
|
|
|
|
|
<SC>{
|
|
{OPTWS}{NL}{OPTWS} ++linenum; /* Allow blank lines & continuations */
|
|
[,*] return (unsigned char) yytext[0];
|
|
">" BEGIN(SECT2); return '>';
|
|
">"/^ BEGIN(CARETISBOL); return '>';
|
|
{SCNAME} RETURNNAME;
|
|
. {
|
|
format_synerr( _( "bad <start condition>: %s" ),
|
|
yytext );
|
|
}
|
|
}
|
|
|
|
<CARETISBOL>"^" BEGIN(SECT2); return '^';
|
|
|
|
|
|
<QUOTE>{
|
|
[^"\n] RETURNCHAR;
|
|
\" BEGIN(SECT2); return '"';
|
|
|
|
{NL} {
|
|
synerr( _( "missing quote" ) );
|
|
BEGIN(SECT2);
|
|
++linenum;
|
|
return '"';
|
|
}
|
|
}
|
|
|
|
<GROUP_WITH_PARAMS>{
|
|
":" BEGIN(SECT2);
|
|
"-" BEGIN(GROUP_MINUS_PARAMS);
|
|
i sf_set_case_ins(1);
|
|
s sf_set_dot_all(1);
|
|
x sf_set_skip_ws(1);
|
|
}
|
|
<GROUP_MINUS_PARAMS>{
|
|
":" BEGIN(SECT2);
|
|
i sf_set_case_ins(0);
|
|
s sf_set_dot_all(0);
|
|
x sf_set_skip_ws(0);
|
|
}
|
|
|
|
<FIRSTCCL>{
|
|
"^"/[^-\]\n] BEGIN(CCL); return '^';
|
|
"^"/("-"|"]") return '^';
|
|
. BEGIN(CCL); RETURNCHAR;
|
|
}
|
|
|
|
<CCL>{
|
|
-/[^\]\n] return '-';
|
|
[^\]\n] RETURNCHAR;
|
|
"]" BEGIN(SECT2); return ']';
|
|
.|{NL} {
|
|
synerr( _( "bad character class" ) );
|
|
BEGIN(SECT2);
|
|
return ']';
|
|
}
|
|
}
|
|
|
|
<FIRSTCCL,CCL>{
|
|
"[:alnum:]" BEGIN(CCL); return CCE_ALNUM;
|
|
"[:alpha:]" BEGIN(CCL); return CCE_ALPHA;
|
|
"[:blank:]" BEGIN(CCL); return CCE_BLANK;
|
|
"[:cntrl:]" BEGIN(CCL); return CCE_CNTRL;
|
|
"[:digit:]" BEGIN(CCL); return CCE_DIGIT;
|
|
"[:graph:]" BEGIN(CCL); return CCE_GRAPH;
|
|
"[:lower:]" BEGIN(CCL); return CCE_LOWER;
|
|
"[:print:]" BEGIN(CCL); return CCE_PRINT;
|
|
"[:punct:]" BEGIN(CCL); return CCE_PUNCT;
|
|
"[:space:]" BEGIN(CCL); return CCE_SPACE;
|
|
"[:upper:]" BEGIN(CCL); return CCE_UPPER;
|
|
"[:xdigit:]" BEGIN(CCL); return CCE_XDIGIT;
|
|
|
|
"[:^alnum:]" BEGIN(CCL); return CCE_NEG_ALNUM;
|
|
"[:^alpha:]" BEGIN(CCL); return CCE_NEG_ALPHA;
|
|
"[:^blank:]" BEGIN(CCL); return CCE_NEG_BLANK;
|
|
"[:^cntrl:]" BEGIN(CCL); return CCE_NEG_CNTRL;
|
|
"[:^digit:]" BEGIN(CCL); return CCE_NEG_DIGIT;
|
|
"[:^graph:]" BEGIN(CCL); return CCE_NEG_GRAPH;
|
|
"[:^lower:]" BEGIN(CCL); return CCE_NEG_LOWER;
|
|
"[:^print:]" BEGIN(CCL); return CCE_NEG_PRINT;
|
|
"[:^punct:]" BEGIN(CCL); return CCE_NEG_PUNCT;
|
|
"[:^space:]" BEGIN(CCL); return CCE_NEG_SPACE;
|
|
"[:^upper:]" BEGIN(CCL); return CCE_NEG_UPPER;
|
|
"[:^xdigit:]" BEGIN(CCL); return CCE_NEG_XDIGIT;
|
|
{CCL_EXPR} {
|
|
format_synerr(
|
|
_( "bad character class expression: %s" ),
|
|
yytext );
|
|
BEGIN(CCL); return CCE_ALNUM;
|
|
}
|
|
}
|
|
|
|
<NUM>{
|
|
[[:digit:]]+ {
|
|
yylval = myctoi( yytext );
|
|
return NUMBER;
|
|
}
|
|
|
|
"," return ',';
|
|
"}" {
|
|
BEGIN(SECT2);
|
|
if ( lex_compat || posix_compat )
|
|
return END_REPEAT_POSIX;
|
|
else
|
|
return END_REPEAT_FLEX;
|
|
}
|
|
|
|
. {
|
|
synerr( _( "bad character inside {}'s" ) );
|
|
BEGIN(SECT2);
|
|
return '}';
|
|
}
|
|
|
|
{NL} {
|
|
synerr( _( "missing }" ) );
|
|
BEGIN(SECT2);
|
|
++linenum;
|
|
return '}';
|
|
}
|
|
}
|
|
|
|
|
|
<PERCENT_BRACE_ACTION>{
|
|
{OPTWS}"%}".* bracelevel = 0;
|
|
|
|
<ACTION>"/*" ACTION_ECHO; yy_push_state( COMMENT );
|
|
|
|
<CODEBLOCK,ACTION>{
|
|
"reject" {
|
|
ACTION_ECHO;
|
|
CHECK_RE_JECT(yytext);
|
|
}
|
|
"yymore" {
|
|
ACTION_ECHO;
|
|
CHECK_YYMORE(yytext);
|
|
}
|
|
}
|
|
|
|
{M4QSTART} ACTION_ECHO_QEND;
|
|
{M4QEND} ACTION_ECHO_QEND;
|
|
. ACTION_ECHO;
|
|
{NL} {
|
|
++linenum;
|
|
ACTION_ECHO;
|
|
if ( bracelevel == 0 ||
|
|
(doing_codeblock && indented_code) )
|
|
{
|
|
if ( doing_rule_action )
|
|
add_action( "\tYY_BREAK\n" );
|
|
|
|
doing_rule_action = doing_codeblock = false;
|
|
BEGIN(SECT2);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* Reject and YYmore() are checked for above, in PERCENT_BRACE_ACTION */
|
|
<ACTION>{
|
|
"{" ACTION_ECHO; ++bracelevel;
|
|
"}" ACTION_ECHO; --bracelevel;
|
|
{M4QSTART} ACTION_ECHO_QEND;
|
|
{M4QEND} ACTION_ECHO_QEND;
|
|
[^[:alpha:]_{}"'/\n\[\]]+ ACTION_ECHO;
|
|
[\[\]] ACTION_ECHO;
|
|
{NAME} ACTION_ECHO;
|
|
"'"([^'\\\n]|\\.)*"'" ACTION_ECHO; /* character constant */
|
|
\" ACTION_ECHO; BEGIN(ACTION_STRING);
|
|
{NL} {
|
|
++linenum;
|
|
ACTION_ECHO;
|
|
if ( bracelevel == 0 )
|
|
{
|
|
if ( doing_rule_action )
|
|
add_action( "\tYY_BREAK\n" );
|
|
|
|
doing_rule_action = false;
|
|
BEGIN(SECT2);
|
|
}
|
|
}
|
|
. ACTION_ECHO;
|
|
}
|
|
|
|
<ACTION_STRING>{
|
|
[^"\\\n]+ ACTION_ECHO;
|
|
\\. ACTION_ECHO;
|
|
{NL} ++linenum; ACTION_ECHO; BEGIN(ACTION);
|
|
\" ACTION_ECHO; BEGIN(ACTION);
|
|
. ACTION_ECHO;
|
|
}
|
|
|
|
<COMMENT,COMMENT_DISCARD,ACTION,ACTION_STRING><<EOF>> {
|
|
synerr( _( "EOF encountered inside an action" ) );
|
|
yyterminate();
|
|
}
|
|
|
|
<EXTENDED_COMMENT,GROUP_WITH_PARAMS,GROUP_MINUS_PARAMS><<EOF>> {
|
|
synerr( _( "EOF encountered inside pattern" ) );
|
|
yyterminate();
|
|
}
|
|
|
|
<SECT2,QUOTE,FIRSTCCL,CCL>{ESCSEQ} {
|
|
yylval = myesc( (Char *) yytext );
|
|
|
|
if ( YY_START == FIRSTCCL )
|
|
BEGIN(CCL);
|
|
|
|
return CHAR;
|
|
}
|
|
|
|
|
|
<SECT3>{
|
|
{M4QSTART} fwrite (escaped_qstart, 1, strlen(escaped_qstart), yyout);
|
|
{M4QEND} fwrite (escaped_qend, 1, strlen(escaped_qend), yyout);
|
|
[^\[\]\n]*(\n?) ECHO;
|
|
(.|\n) ECHO;
|
|
<<EOF>> sectnum = 0; yyterminate();
|
|
}
|
|
|
|
<*>.|\n format_synerr( _( "bad character: %s" ), yytext );
|
|
|
|
%%
|
|
|
|
|
|
int yywrap()
|
|
{
|
|
if ( --num_input_files > 0 )
|
|
{
|
|
set_input_file( *++input_files );
|
|
return 0;
|
|
}
|
|
|
|
else
|
|
return 1;
|
|
}
|
|
|
|
|
|
/* set_input_file - open the given file (if NULL, stdin) for scanning */
|
|
|
|
void set_input_file( file )
|
|
char *file;
|
|
{
|
|
if ( file && strcmp( file, "-" ) )
|
|
{
|
|
infilename = copy_string( file );
|
|
yyin = fopen( infilename, "r" );
|
|
|
|
if ( yyin == NULL )
|
|
lerrsf( _( "can't open %s" ), file );
|
|
}
|
|
|
|
else
|
|
{
|
|
yyin = stdin;
|
|
infilename = copy_string( "<stdin>" );
|
|
}
|
|
|
|
linenum = 1;
|
|
}
|
|
|
|
|
|
/* Wrapper routines for accessing the scanner's malloc routines. */
|
|
|
|
void *flex_alloc( size )
|
|
size_t size;
|
|
{
|
|
return (void *) malloc( size );
|
|
}
|
|
|
|
void *flex_realloc( ptr, size )
|
|
void *ptr;
|
|
size_t size;
|
|
{
|
|
return (void *) realloc( ptr, size );
|
|
}
|
|
|
|
void flex_free( ptr )
|
|
void *ptr;
|
|
{
|
|
if ( ptr )
|
|
free( ptr );
|
|
}
|