/* scanner generator for flashmap descriptor language */ /* SPDX-License-Identifier: GPL-2.0-only */ %{ #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; <FLAGS>PRESERVE return FLAG_PRESERVE; 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; }