/* * 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-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; }