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-rw-r--r--util/blobtool/blobtool.l145
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diff --git a/util/blobtool/blobtool.l b/util/blobtool/blobtool.l
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+/*
+ * 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);
+}
+