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/*
* fmd_scanner.l, scanner generator for flashmap descriptor language
*
* Copyright (C) 2015 Google, Inc.
*
* This program 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; version 2 of the License.
*
* This program 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.
*/
%{
#include "fmd_parser.h"
#include <assert.h>
#include <string.h>
int parse_integer(char *src, int base);
int copy_string(const char *src);
%}
%option noyywrap
%s FLAGS
MULTIPLIER [KMG]
%%
[[:space:]]+ /* Eat whitespace. */
#.*$ /* Eat comments. */
\( BEGIN(FLAGS); return *yytext;
<FLAGS>\) BEGIN(INITIAL); return *yytext;
<FLAGS>CBFS return FLAG_CBFS;
0{MULTIPLIER}? |
[1-9][0-9]*{MULTIPLIER}? return parse_integer(yytext, 10);
0[0-9]+{MULTIPLIER}? return OCTAL;
0[xX][0-9a-fA-F]+{MULTIPLIER}? return parse_integer(yytext + 2, 16);
[^#@{}()[:space:]]* return copy_string(yytext);
. return *yytext;
%%
int parse_integer(char *src, int base)
{
char *multiplier = NULL;
unsigned val = strtoul(src, &multiplier, base);
if (*multiplier) {
switch(*multiplier) {
case 'K':
val *= 1024;
break;
case 'M':
val *= 1024*1024;
break;
case 'G':
val *= 1024*1024*1024;
break;
default:
// If we ever get here, the MULTIPLIER regex is allowing
// multiplier suffixes not handled by this code.
assert(false);
}
}
yylval.intval = val;
return INTEGER;
}
int copy_string(const char *src)
{
yylval.strval = strdup(src);
return STRING;
}
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