| /* |
| * 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 |
| |
| MULTIPLIER [KMG] |
| |
| %% |
| |
| [[:space:]]+ /* Eat whitespace. */ |
| #.*$ /* Eat comments. */ |
| 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; |
| } |