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%{
/*
* Copyright (c) 2002, 2004 Tama Communications Corporation
*
* This file is part of GNU GLOBAL.
*
* GNU GLOBAL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* GNU GLOBAL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/*
* scanner for C++ source code.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#ifdef STDC_HEADERS
#include <stdlib.h>
#endif
#include "global.h"
#include "anchor.h"
#include "incop.h"
#include "path2url.h"
#include "common.h"
#include "htags.h"
#include "../gtags-parser/cpp_res.h"
#define lex_symbol_generation_rule(x) cpp_ ## x
#include "lexcommon.h"
#ifdef ECHO
#undef ECHO
#endif
#define ECHO echos(LEXTEXT)
#define YY_USER_ACTION DEFAULT_YY_USER_ACTION
static int last_directive;
%}
/* Definitions */
H 0[Xx][0-9A-Fa-f]+
N [0-9]+
L {N}L?
D1 {N}\.{N}([Ee][+-]?{N})?
D2 \.{N}([Ee][+-]?{N})?
NUMBER -?({L}|{D1}|{D2})
ALPHA [a-zA-Z_\x80-\xff]
ALPHANUM [a-zA-Z_\x80-\xff0-9]
WORD {ALPHA}{ALPHANUM}*
%start CPP C_COMMENT CPP_COMMENT SHELL_COMMENT STRING LITERAL PREPROCESSOR_LINE
%option 8bit noyywrap noyy_top_state stack prefix="cpp_"
%%
/* Backslash-newline */
\\\n DEFAULT_BACKSLASH_NEWLINE_ACTION
/* Comment */
<CPP,PREPROCESSOR_LINE>"/*" { echos(comment_begin); ECHO; yy_push_state(C_COMMENT); }
<C_COMMENT>"*/" { ECHO; echos(comment_end); yy_pop_state(); }
<C_COMMENT>. { put_char(LEXTEXT[0]); }
<C_COMMENT><<EOF>> {
if (wflag)
unexpected_eof(LINENO);
yyterminate();
}
<CPP,PREPROCESSOR_LINE>"//" { echos(comment_begin); ECHO; yy_push_state(CPP_COMMENT); }
/* String */
<CPP,PREPROCESSOR_LINE>\" { ECHO; yy_push_state(STRING); }
<STRING>\" { ECHO; yy_pop_state(); }
<STRING>\\. { put_char(LEXTEXT[0]); put_char(LEXTEXT[1]); }
/* Literal */
<CPP,PREPROCESSOR_LINE>\' { ECHO; yy_push_state(LITERAL); }
<LITERAL>\' { ECHO; yy_pop_state(); }
<LITERAL>\\. { put_char(LEXTEXT[0]); put_char(LEXTEXT[1]); }
/* Preprocessing directive */
<CPP>^[ \t]*\#[ \t]*(import|include|include_next) {
int c;
put_macro(LEXTEXT);
/*
* #include| <aaa/bbb.h>|
* ~~~~~~~~~~~~~~~~
*/
while ((c = input()) && c != '\n' && isspace(c))
echoc(c);
if (c == '\n') {
unput(c);
} else if (c) {
char path[MAXPATHLEN+1], *p = path;
int sep = 0;
if (c == '"')
sep = c;
else if (c == '<')
sep = '>';
put_char(c);
/* pick up path name */
while ((c = input()) && c != sep && c != '\n')
*p++ = c;
*p = '\0';
if (c == sep) {
struct data *inc;
const char *basename = locatestring(path, "/", MATCH_LAST);
if (basename)
basename++;
else
basename = path;
inc = get_inc(basename);
if (inc)
put_include_anchor(inc, path);
else
echos(path);
put_char(sep);
} else {
echos(path);
if (c)
unput(c);
}
}
}
<CPP>^[ \t]*\#[ \t]*{WORD} {
if ((last_directive = cpp_reserved_sharp(LEXTEXT, LINENO)) != 0)
put_macro(LEXTEXT);
else {
ECHO;
if (wflag)
unknown_preprocessing_directive(LEXTEXT, LINENO);
}
yy_push_state(PREPROCESSOR_LINE);
}
/* Null directive */
<CPP>^[ \t]*\# { put_macro(LEXTEXT); }
<CPP,PREPROCESSOR_LINE>{NUMBER} ECHO;
<CPP,PREPROCESSOR_LINE>{WORD} {
if (cpp_reserved_word(LEXTEXT, LEXLENG))
put_reserved_word(LEXTEXT);
else if (YY_START == PREPROCESSOR_LINE
&& (last_directive == SHARP_IF || last_directive == SHARP_ELIF)
&& strcmp(LEXTEXT, "defined") == 0)
put_reserved_word(LEXTEXT);
else {
struct anchor *a = anchor_get(LEXTEXT, LEXLENG, 0, LINENO);
if (a) {
put_anchor(gettag(a), a->type, LINENO);
a->done = 1;
} else {
ECHO;
}
}
}
<CPP,PREPROCESSOR_LINE>[{}] { put_brace(LEXTEXT); }
/* New line */
\n DEFAULT_END_OF_LINE_ACTION
. { put_char(LEXTEXT[0]); }
%%
void
cpp_parser_init(ip)
FILE *ip;
{
newline_terminate_string = 1;
DEFAULT_BEGIN_OF_FILE_ACTION
BEGIN CPP;
}
|
