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Diffstat (limited to 'util/blobtool/blobtool.l')
-rw-r--r-- | util/blobtool/blobtool.l | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/util/blobtool/blobtool.l b/util/blobtool/blobtool.l new file mode 100644 index 0000000000..43c2b15971 --- /dev/null +++ b/util/blobtool/blobtool.l @@ -0,0 +1,145 @@ +/* + * blobtool - Compiler/Decompiler for data blobs with specs + * Copyright (C) 2017 Damien Zammit <damien@zamaudio.com> + * + * 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, either version 3 of the License, or + * (at your option) any later version. + * + * 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 <stdio.h> +#include <stdlib.h> +#include <string.h> +#include "blobtool.tab.h" + +extern struct blob binary; + +unsigned int parsehex (char *s) +{ + unsigned int i, nib, val = 0; + unsigned int nibs = strlen(s) - 2; + + for (i = 2; i < nibs + 2; i++) { + if (s[i] >= '0' && s[i] <= '9') { + nib = s[i] - '0'; + } else if (s[i] >= 'a' && s[i] <= 'f') { + nib = s[i] - 'a' + 10; + } else if (s[i] >= 'A' && s[i] <= 'F') { + nib = s[i] - 'A' + 10; + } else { + return 0; + } + val |= nib << (((nibs - 1) - (i - 2)) * 4); + } + return val; +} + +char* stripquotes (char *string) +{ + char *stripped; + unsigned int len = strlen(string); + if (len >= 2 && string[0] == '\"' && string[len-1] == '\"') { + stripped = (char *) malloc (len - 2 + 1); + snprintf (stripped, len - 2 + 1, "%s", string+1); + stripped[len-2] = '\0'; + return stripped; + } else { + return 0; + } +} + +%} + +%option noyywrap +%option nounput + +DIGIT1to9 [1-9] +DIGIT [0-9] +DIGITS {DIGIT}+ +INT {DIGIT}|{DIGIT1to9}{DIGITS}|-{DIGIT}|-{DIGIT1to9}{DIGITS} +FRAC [.]{DIGITS} +E [eE][+-]? +EXP {E}{DIGITS} +HEX_DIGIT [0-9a-fA-F] +HEX_DIGITS {HEX_DIGIT}+ +NUMBER {INT}|{INT}{FRAC}|{INT}{EXP}|{INT}{FRAC}{EXP} +UNICODECHAR \\u{HEX_DIGIT}{HEX_DIGIT}{HEX_DIGIT}{HEX_DIGIT} +ALPHA [a-zA-Z] +SPECIAL [()\[\]"'@_\-+:;/\\.,<> ] +VARCHAR {ALPHA}|{DIGIT}|{SPECIAL} +CHAR {VARCHAR}|{UNICODECHAR} +CHARS {CHAR}+ +QUOTE ["] +HEX_PREFIX [0][x] +HEX {HEX_PREFIX}{HEX_DIGITS} +STRING {QUOTE}{QUOTE}|{QUOTE}{CHARS}{QUOTE} +COMMENT [#]{CHARS}[\n]|[#]\n + +%% + +{STRING} { + yylval.str = stripquotes(yytext); + return name; +}; + +{NUMBER} { + yylval.u32 = atoi(yytext); + return val; +}; + +{HEX} { + yylval.u32 = parsehex(yytext); + return val; +}; + +\{ { + return '{'; +}; + +\} { + return '}'; +}; + +\[ { + return '['; +}; + +\] { + return ']'; +}; + +, { + return ','; +}; + +: { + return ':'; +}; + += { + return '='; +}; + +[ \t\n]+ /* ignore whitespace */; + +{COMMENT} /* ignore comments */ + +\% { + return '%'; +}; + +<<EOF>> { return eof; }; + +%% + +void set_input_string(char* in) { + yy_scan_string(in); +} + |