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|
/* -*- mode: C -*- */
/* --------------------------------------------------------------------------
libconfig - A library for processing structured configuration files
Copyright (C) 2005-2010 Mark A Lindner
This file is part of libconfig.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public License
as published by the Free Software Foundation; either version 2.1 of
the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, see
<http://www.gnu.org/licenses/>.
----------------------------------------------------------------------------
*/
%option nounistd
%option reentrant
%option noyywrap
%option yylineno
%option nounput
%option bison-bridge
%option never-interactive
%option header-file="scanner.h"
%option outfile="lex.yy.c"
%option extra-type="struct scan_context *"
%top{
#include "scanctx.h"
}
%{
#ifdef _MSC_VER
#pragma warning (disable: 4996)
/* disable MSVC warning "signed/unsigned mismatch" associated with code generated by flex versions such as 2.5.35. */
#pragma warning (disable:4018)
#endif
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include "grammar.h"
#include "wincompat.h"
#include "parsectx.h"
#define YY_NO_INPUT // Suppress generation of useless input() function
static unsigned long long fromhex(const char *s)
{
#ifdef __MINGW32__
/* MinGW's strtoull() seems to be broken; it only returns the lower
* 32 bits...
*/
const char *p = s;
unsigned long long val = 0;
if(*p != '0')
return(0);
++p;
if(*p != 'x' && *p != 'X')
return(0);
for(++p; isxdigit(*p); ++p)
{
val <<= 4;
val |= ((*p < 'A') ? (*p & 0xF) : (9 + (*p & 0x7)));
}
return(val);
#else /* ! __MINGW32__ */
return(strtoull(s, NULL, 16));
#endif /* __MINGW32__ */
}
%}
true [Tt][Rr][Uu][Ee]
false [Ff][Aa][Ll][Ss][Ee]
name [A-Za-z\*][-A-Za-z0-9_\*']*
integer [-+]?[0-9]+
integer64 [-+]?[0-9]+L(L)?
hex 0[Xx][0-9A-Fa-f]+
hex64 0[Xx][0-9A-Fa-f]+L(L)?
hexchar \\[Xx][0-9A-Fa-f]{2}
float ([-+]?([0-9]*)?\.[0-9]*([eE][-+]?[0-9]+)?)|([-+]?([0-9]+)(\.[0-9]*)?[eE][-+]?[0-9]+)
comment (#|\/\/).*$
include_open ^[ \t]*@include[ \t]+\"
%x COMMENT STRING INCLUDE SCRIPTBLOCK
%%
\/\* { BEGIN COMMENT; }
<COMMENT>\*\/ { BEGIN INITIAL; }
<COMMENT>. { /* ignore */ }
<COMMENT>\n { /* ignore */ }
\" { BEGIN STRING; }
<STRING>[^\"\\]+ { scanctx_append_string(yyextra, yytext); }
<STRING>\\n { scanctx_append_string(yyextra, "\n"); }
<STRING>\\r { scanctx_append_string(yyextra, "\r"); }
<STRING>\\t { scanctx_append_string(yyextra, "\t"); }
<STRING>\\f { scanctx_append_string(yyextra, "\f"); }
<STRING>\\\\ { scanctx_append_string(yyextra, "\\"); }
<STRING>\\\" { scanctx_append_string(yyextra, "\""); }
<STRING>{hexchar} {
char c[2] = { (char)(strtol(yytext + 2, NULL, 16) & 0xFF),
0 };
scanctx_append_string(yyextra, c);
}
<STRING>\\ { scanctx_append_string(yyextra, "\\"); }
<STRING>\" {
yylval->sval = scanctx_take_string(yyextra);
BEGIN INITIAL;
return(TOK_STRING);
}
\<\? { BEGIN SCRIPTBLOCK; }
<SCRIPTBLOCK>([^\?]|\?[^\>])+ { scanctx_append_string(yyextra, yytext); }
<SCRIPTBLOCK>\?\> {
yylval->sval = scanctx_take_string(yyextra);
BEGIN INITIAL;
return(TOK_STRING);
}
{include_open} { BEGIN INCLUDE; }
<INCLUDE>[^\"\\]+ { scanctx_append_string(yyextra, yytext); }
<INCLUDE>\\\\ { scanctx_append_string(yyextra, "\\"); }
<INCLUDE>\\\" { scanctx_append_string(yyextra, "\""); }
<INCLUDE>\" {
const char *error;
FILE *fp = scanctx_push_include(yyextra,
(void *)YY_CURRENT_BUFFER,
&error);
if(fp)
{
yyin = fp;
yy_switch_to_buffer(
yy_create_buffer(yyin, YY_BUF_SIZE, yyscanner),
yyscanner);
}
else
{
yyextra->config->error_text = error;
yyextra->config->error_file = scanctx_current_filename(
yyextra);
yyextra->config->error_line = libconfig_yyget_lineno(
yyscanner);
return TOK_ERROR;
}
BEGIN INITIAL;
}
\n|\r|\f { /* ignore */ }
[ \t]+ { /* ignore */ }
\=|\: { return(TOK_EQUALS); }
, { return(TOK_COMMA); }
\{ { return(TOK_GROUP_START); }
\} { return(TOK_GROUP_END); }
{true} { yylval->ival = 1; return(TOK_BOOLEAN); }
{false} { yylval->ival = 0; return(TOK_BOOLEAN); }
{name} { yylval->sval = yytext; return(TOK_NAME); }
{float} { yylval->fval = atof(yytext); return(TOK_FLOAT); }
{integer} { yylval->ival = atoi(yytext); return(TOK_INTEGER); }
{integer64} { yylval->llval = atoll(yytext); return(TOK_INTEGER64); }
{hex} {
yylval->ival = strtoul(yytext, NULL, 16);
return(TOK_HEX);
}
{hex64} { yylval->llval = fromhex(yytext); return(TOK_HEX64); }
\[ { return(TOK_ARRAY_START); }
\] { return(TOK_ARRAY_END); }
\( { return(TOK_LIST_START); }
\) { return(TOK_LIST_END); }
; { return(TOK_SEMICOLON); }
{comment} { /* ignore */ }
. { return(TOK_GARBAGE); }
<<EOF>> {
YY_BUFFER_STATE buf = (YY_BUFFER_STATE)scanctx_pop_include(
yyextra);
if(buf)
{
yy_delete_buffer(YY_CURRENT_BUFFER, yyscanner);
yy_switch_to_buffer(buf, yyscanner);
}
else
yyterminate();
}
|
