/* scan.l - scanner for flex input */
* Copyright (c) 1990 The Regents of the University of California.
* This code is derived from software contributed to Berkeley by
* 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.
* Redistribution and use in source and binary forms are permitted provided
* that: (1) source distributions retain this entire copyright notice and
* comment, and (2) distributions including binaries display the following
* acknowledgement: ``This product includes software developed by the
* University of California, Berkeley and its contributors'' in the
* documentation or other materials provided with the distribution and in
* all advertising materials mentioning features or use of this software.
* 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.
"@(#) $Header: /usr/fsys/odin/a/vern/flex/RCS/scan.l,v 2.9 90/06/27 23:48:34 vern Exp $ (LBL)";
#define ACTION_ECHO fprintf( temp_action_file, "%s", yytext )
#define MARK_END_OF_PROLOG fprintf( temp_action_file, "%%%% end of prolog\n" );
(void) strcpy( nmstr, (char *) yytext ); \
#define PUT_BACK_STRING(str, start) \
for ( i = strlen( (char *) (str) ) - 1; i >= start; --i ) \
#define CHECK_REJECT(str) \
if ( all_upper( str ) ) \
#define CHECK_YYMORE(str) \
if ( all_lower( str ) ) \
%x SECT2 SECT2PROLOG SECT3 CODEBLOCK PICKUPDEF SC CARETISBOL NUM QUOTE
%x FIRSTCCL CCL ACTION RECOVER BRACEERROR C_COMMENT ACTION_COMMENT
%x ACTION_STRING PERCENT_BRACE_ACTION USED_LIST CODEBLOCK_2 XLATION
ESCSEQ \\([^\n]|[0-9]{1,3}|x[0-9a-f]{1,2})
static int bracelevel, didadef;
int i, indented_code, checking_used, new_xlation;
int doing_codeblock = false;
Char nmdef[MAXLINE], myesc();
^{WS} indented_code = true; BEGIN(CODEBLOCK);
^#.*\n ++linenum; /* treat as a comment */
^"/*" ECHO; BEGIN(C_COMMENT);
^"%s"{NAME}? return ( SCDECL );
^"%x"{NAME}? return ( XSCDECL );
line_directive_out( stdout );
{WS} return ( WHITESPACE );
line_directive_out( stdout );
pinpoint_message( "warning - %%used/%%unused have been deprecated" );
checking_used = REALLY_USED; BEGIN(USED_LIST);
checking_used = REALLY_NOT_USED; BEGIN(USED_LIST);
pinpoint_message( "warning - %%used/%%unused have been deprecated" );
checking_used = REALLY_NOT_USED; BEGIN(USED_LIST);
"old-style lex command at line %d ignored:\n\t%s",
^"%"[cr]{OPTWS} /* ignore old lex directive */
(int *) malloc( sizeof( int ) * (unsigned) csize );
"dynamic memory failure building %t table" );
for ( i = 0; i < csize; ++i )
^"%"[^sxanpekotcru{}]{OPTWS} synerr( "unrecognized '%' directive" );
(void) strcpy( nmstr, (char *) yytext );
^{OPTWS}\n ++linenum; /* allows blank lines in section 1 */
{OPTWS}\n ++linenum; return ( '\n' );
. synerr( "illegal character" ); BEGIN(RECOVER);
<C_COMMENT>"*/" ECHO; BEGIN(INITIAL);
<C_COMMENT>"*/".*\n ++linenum; ECHO; BEGIN(INITIAL);
<C_COMMENT>\n ++linenum; ECHO;
<CODEBLOCK>^"%}".*\n ++linenum; BEGIN(INITIAL);
<CODEBLOCK>"reject" ECHO; CHECK_REJECT(yytext);
<CODEBLOCK>"yymore" ECHO; CHECK_YYMORE(yytext);
<CODEBLOCK>{NAME}|{NOT_NAME}|. ECHO;
<PICKUPDEF>{WS} /* separates name and definition */
(void) strcpy( (char *) nmdef, (char *) yytext );
for ( i = strlen( (char *) nmdef ) - 1;
nmdef[i] == ' ' || nmdef[i] == '\t';
ndinstal( nmstr, nmdef );
synerr( "incomplete name definition" );
<RECOVER>.*\n ++linenum; BEGIN(INITIAL); RETURNNAME;
<USED_LIST>\n ++linenum; BEGIN(INITIAL);
if ( all_upper( yytext ) )
reject_really_used = checking_used;
synerr( "unrecognized %used/%unused construct" );
if ( all_lower( yytext ) )
yymore_really_used = checking_used;
synerr( "unrecognized %used/%unused construct" );
<USED_LIST>{NOT_WS}+ synerr( "unrecognized %used/%unused construct" );
<XLATION>"%t"{OPTWS}\n ++linenum; BEGIN(INITIAL);
<XLATION>^{OPTWS}[0-9]+ ++num_xlations; new_xlation = true;
<XLATION>^. synerr( "bad row in translation table" );
<XLATION>{WS} /* ignore whitespace */
xlation[myesc( yytext )] =
(new_xlation ? num_xlations : -num_xlations);
(new_xlation ? num_xlations : -num_xlations);
<SECT2PROLOG>.*\n/{NOT_WS} {
<SECT2PROLOG>.*\n ++linenum; ACTION_ECHO;
<SECT2PROLOG><<EOF>> MARK_END_OF_PROLOG; yyterminate();
<SECT2>^{OPTWS}\n ++linenum; /* allow blank lines in section 2 */
indented_code = (yytext[0] != '%');
<SECT2>"<" BEGIN(SC); return ( '<' );
<SECT2>^"^" return ( '^' );
<SECT2>\" BEGIN(QUOTE); return ( '"' );
<SECT2>"{"/[0-9] BEGIN(NUM); return ( '{' );
<SECT2>"{"[^0-9\n][^}\n]* BEGIN(BRACEERROR);
<SECT2>"$"/[ \t\n] return ( '$' );
BEGIN(PERCENT_BRACE_ACTION);
<SECT2>{WS}"|".*\n continued_action = true; ++linenum; return ( '\n' );
/* 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}
continued_action = false;
continued_action = false;
<SECT2>^{OPTWS}\n ++linenum; return ( '\n' );
<SECT2>"<<EOF>>" return ( EOF_OP );
return ( EOF ); /* to stop the parser */
<SECT2>"["([^\\\]\n]|{ESCSEQ})+"]" {
(void) strcpy( nmstr, (char *) yytext );
/* check to see if we've already encountered this ccl */
if ( (cclval = ccllookup( (Char *) nmstr )) )
/* 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
PUT_BACK_STRING((Char *) nmstr, 1);
(void) strcpy( nmstr, (char *) yytext );
nmstr[yyleng - 1] = '\0'; /* chop trailing brace */
/* lookup from "nmstr + 1" to chop leading brace */
if ( ! (nmdefptr = ndlookup( nmstr + 1 )) )
synerr( "undefined {name}" );
{ /* push back name surrounded by ()'s */
PUT_BACK_STRING(nmdefptr, 0);
<SECT2>[/|*+?.()] return ( yytext[0] );
<SECT2>\n ++linenum; return ( '\n' );
<SC>">" BEGIN(SECT2); return ( '>' );
<SC>">"/"^" BEGIN(CARETISBOL); return ( '>' );
<SC>. synerr( "bad start condition name" );
<CARETISBOL>"^" BEGIN(SECT2); return ( '^' );
<QUOTE>[^"\n] RETURNCHAR;
<QUOTE>\" BEGIN(SECT2); return ( '"' );
synerr( "missing quote" );
<FIRSTCCL>"^"/[^-\n] BEGIN(CCL); return ( '^' );
<FIRSTCCL>"^"/- return ( '^' );
<FIRSTCCL>- BEGIN(CCL); yylval = '-'; return ( CHAR );
<FIRSTCCL>. BEGIN(CCL); RETURNCHAR;
<CCL>-/[^\]\n] return ( '-' );
<CCL>"]" BEGIN(SECT2); return ( ']' );
yylval = myctoi( yytext );
<NUM>"}" BEGIN(SECT2); return ( '}' );
synerr( "bad character inside {}'s" );
<BRACEERROR>"}" synerr( "bad name in {}'s" ); BEGIN(SECT2);
<BRACEERROR>\n synerr( "missing }" ); ++linenum; BEGIN(SECT2);
<PERCENT_BRACE_ACTION,CODEBLOCK_2>{OPTWS}"%}".* bracelevel = 0;
<PERCENT_BRACE_ACTION,CODEBLOCK_2,ACTION>"reject" {
<PERCENT_BRACE_ACTION,CODEBLOCK_2,ACTION>"yymore" {
<PERCENT_BRACE_ACTION,CODEBLOCK_2>{NAME}|{NOT_NAME}|. ACTION_ECHO;
<PERCENT_BRACE_ACTION,CODEBLOCK_2>\n {
(doing_codeblock && indented_code) )
fputs( "\tYY_BREAK\n", temp_action_file );
/* Reject and YYmore() are checked for above, in PERCENT_BRACE_ACTION */
<ACTION>"{" ACTION_ECHO; ++bracelevel;
<ACTION>"}" ACTION_ECHO; --bracelevel;
<ACTION>[^a-z_{}"'/\n]+ ACTION_ECHO;
<ACTION>{NAME} ACTION_ECHO;
<ACTION>"/*" ACTION_ECHO; BEGIN(ACTION_COMMENT);
<ACTION>"'"([^'\\\n]|\\.)*"'" ACTION_ECHO; /* character constant */
<ACTION>\" ACTION_ECHO; BEGIN(ACTION_STRING);
fputs( "\tYY_BREAK\n", temp_action_file );
<ACTION_COMMENT>"*/" ACTION_ECHO; BEGIN(ACTION);
<ACTION_COMMENT>[^*\n]+ ACTION_ECHO;
<ACTION_COMMENT>"*" ACTION_ECHO;
<ACTION_COMMENT>\n ++linenum; ACTION_ECHO;
<ACTION_COMMENT>. ACTION_ECHO;
<ACTION_STRING>[^"\\\n]+ ACTION_ECHO;
<ACTION_STRING>\\. ACTION_ECHO;
<ACTION_STRING>\n ++linenum; ACTION_ECHO;
<ACTION_STRING>\" ACTION_ECHO; BEGIN(ACTION);
<ACTION_STRING>. ACTION_ECHO;
<ACTION,ACTION_COMMENT,ACTION_STRING><<EOF>> {
synerr( "EOF encountered inside an action" );
<SECT2,QUOTE,CCL>{ESCSEQ} {
yylval = myesc( yytext );
yylval = myesc( yytext );
if ( --num_input_files > 0 )
set_input_file( *++input_files );
/* set_input_file - open the given file (if NULL, stdin) for scanning */
void set_input_file( file )
yyin = fopen( infilename, "r" );
lerrsf( "can't open %s", file );