Patrick Georgi | ea063cb | 2020-05-08 19:28:13 +0200 | [diff] [blame] | 1 | /* bincfg - Compiler/Decompiler for data blobs with specs */ |
Patrick Georgi | 7333a11 | 2020-05-08 20:48:04 +0200 | [diff] [blame] | 2 | /* SPDX-License-Identifier: GPL-3.0-or-later */ |
Damien Zammit | 0685322 | 2016-11-16 21:06:54 +1100 | [diff] [blame] | 3 | |
| 4 | %{ |
| 5 | #include <stdio.h> |
| 6 | #include <stdlib.h> |
| 7 | #include <string.h> |
Denis 'GNUtoo' Carikli | 780e931 | 2018-01-10 14:35:55 +0100 | [diff] [blame] | 8 | #include "bincfg.tab.h" |
Damien Zammit | 0685322 | 2016-11-16 21:06:54 +1100 | [diff] [blame] | 9 | |
| 10 | extern struct blob binary; |
| 11 | |
| 12 | unsigned int parsehex (char *s) |
| 13 | { |
Martin Roth | db4719f | 2021-02-13 23:19:51 -0700 | [diff] [blame] | 14 | unsigned int i, nib, retval = 0; |
Damien Zammit | 0685322 | 2016-11-16 21:06:54 +1100 | [diff] [blame] | 15 | unsigned int nibs = strlen(s) - 2; |
| 16 | |
| 17 | for (i = 2; i < nibs + 2; i++) { |
| 18 | if (s[i] >= '0' && s[i] <= '9') { |
| 19 | nib = s[i] - '0'; |
| 20 | } else if (s[i] >= 'a' && s[i] <= 'f') { |
| 21 | nib = s[i] - 'a' + 10; |
| 22 | } else if (s[i] >= 'A' && s[i] <= 'F') { |
| 23 | nib = s[i] - 'A' + 10; |
| 24 | } else { |
| 25 | return 0; |
| 26 | } |
Martin Roth | db4719f | 2021-02-13 23:19:51 -0700 | [diff] [blame] | 27 | retval |= nib << (((nibs - 1) - (i - 2)) * 4); |
Damien Zammit | 0685322 | 2016-11-16 21:06:54 +1100 | [diff] [blame] | 28 | } |
Martin Roth | db4719f | 2021-02-13 23:19:51 -0700 | [diff] [blame] | 29 | return retval; |
Damien Zammit | 0685322 | 2016-11-16 21:06:54 +1100 | [diff] [blame] | 30 | } |
| 31 | |
| 32 | char* stripquotes (char *string) |
| 33 | { |
| 34 | char *stripped; |
| 35 | unsigned int len = strlen(string); |
Martin Roth | 6d189cc | 2017-04-08 17:05:23 -0600 | [diff] [blame] | 36 | if (len >= 2 && string[0] == '"' && string[len - 1] == '"') { |
| 37 | stripped = (char *) malloc (len - 1); |
| 38 | if (stripped == NULL) { |
| 39 | printf("Out of memory\n"); |
| 40 | exit(1); |
| 41 | } |
| 42 | snprintf (stripped, len - 1, "%s", string + 1); |
Damien Zammit | 0685322 | 2016-11-16 21:06:54 +1100 | [diff] [blame] | 43 | return stripped; |
Damien Zammit | 0685322 | 2016-11-16 21:06:54 +1100 | [diff] [blame] | 44 | } |
Martin Roth | 6d189cc | 2017-04-08 17:05:23 -0600 | [diff] [blame] | 45 | return NULL; |
Damien Zammit | 0685322 | 2016-11-16 21:06:54 +1100 | [diff] [blame] | 46 | } |
| 47 | |
| 48 | %} |
| 49 | |
| 50 | %option noyywrap |
| 51 | %option nounput |
| 52 | |
Damien Zammit | 0685322 | 2016-11-16 21:06:54 +1100 | [diff] [blame] | 53 | DIGIT [0-9] |
Martin Roth | 6d189cc | 2017-04-08 17:05:23 -0600 | [diff] [blame] | 54 | INT [-]?{DIGIT}|[-]?[1-9]{DIGIT}+ |
| 55 | FRAC [.]{DIGIT}+ |
| 56 | EXP [eE][+-]?{DIGIT}+ |
Damien Zammit | 0685322 | 2016-11-16 21:06:54 +1100 | [diff] [blame] | 57 | NUMBER {INT}|{INT}{FRAC}|{INT}{EXP}|{INT}{FRAC}{EXP} |
Martin Roth | 6d189cc | 2017-04-08 17:05:23 -0600 | [diff] [blame] | 58 | HEX [0][x][0-9a-fA-F]+ |
| 59 | STRING ["][^"]*["] |
| 60 | COMMENT [#][^\n]*$ |
Damien Zammit | 0685322 | 2016-11-16 21:06:54 +1100 | [diff] [blame] | 61 | |
| 62 | %% |
| 63 | |
| 64 | {STRING} { |
| 65 | yylval.str = stripquotes(yytext); |
| 66 | return name; |
| 67 | }; |
| 68 | |
| 69 | {NUMBER} { |
| 70 | yylval.u32 = atoi(yytext); |
| 71 | return val; |
| 72 | }; |
| 73 | |
| 74 | {HEX} { |
| 75 | yylval.u32 = parsehex(yytext); |
| 76 | return val; |
| 77 | }; |
| 78 | |
| 79 | \{ { |
| 80 | return '{'; |
| 81 | }; |
| 82 | |
| 83 | \} { |
| 84 | return '}'; |
| 85 | }; |
| 86 | |
| 87 | \[ { |
| 88 | return '['; |
| 89 | }; |
| 90 | |
| 91 | \] { |
| 92 | return ']'; |
| 93 | }; |
| 94 | |
| 95 | , { |
| 96 | return ','; |
| 97 | }; |
| 98 | |
| 99 | : { |
| 100 | return ':'; |
| 101 | }; |
| 102 | |
| 103 | = { |
| 104 | return '='; |
| 105 | }; |
| 106 | |
| 107 | [ \t\n]+ /* ignore whitespace */; |
| 108 | |
| 109 | {COMMENT} /* ignore comments */ |
| 110 | |
| 111 | \% { |
| 112 | return '%'; |
| 113 | }; |
| 114 | |
| 115 | <<EOF>> { return eof; }; |
| 116 | |
| 117 | %% |
| 118 | |
| 119 | void set_input_string(char* in) { |
| 120 | yy_scan_string(in); |
| 121 | } |