79 lines
1.9 KiB
Plaintext
79 lines
1.9 KiB
Plaintext
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/*
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* fmd_scanner.l, scanner generator for flashmap descriptor language
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*
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* Copyright (C) 2015 Google, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
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*/
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%{
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#include "fmd_parser.h"
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#include <assert.h>
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#include <string.h>
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int parse_integer(char *input, int base);
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int copy_string(const char *input);
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%}
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%option noyywrap
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MULTIPLIER [KMG]
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%%
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[[:space:]]+ /* Eat whitespace. */
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#.*$ /* Eat comments. */
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0{MULTIPLIER}? |
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[1-9][0-9]*{MULTIPLIER}? return parse_integer(yytext, 10);
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0[0-9]+{MULTIPLIER}? return OCTAL;
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0[xX][0-9a-f]+{MULTIPLIER}? return parse_integer(yytext + 2, 16);
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[^#@{}()[:space:]]* return copy_string(yytext);
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. return *yytext;
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%%
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int parse_integer(char *input, int base)
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{
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char *multiplier = NULL;
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unsigned val = strtoul(input, &multiplier, base);
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if (*multiplier) {
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switch(*multiplier) {
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case 'K':
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val *= 1024;
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break;
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case 'M':
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val *= 1024*1024;
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break;
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case 'G':
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val *= 1024*1024*1024;
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break;
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default:
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// If we ever get here, the MULTIPLIER regex is allowing
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// multiplier suffixes not handled by this code.
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assert(false);
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}
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}
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yylval.intval = val;
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return INTEGER;
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}
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int copy_string(const char *input)
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{
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yylval.strval = strdup(input);
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return STRING;
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}
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