5 #include <talloc/talloc.h>
8 %option nounput noinput
9 %option batch never-interactive
12 %option stack noyy_top_state
15 %option noyyalloc noyyfree noyyrealloc
16 %option extra-type="struct grub2_parser *"
17 %option header-file="lexer.h"
18 %option outfile="lexer.c"
23 WORD [^{}|&$;<> \t\n'"]+
24 VARNAME ([[:alpha:]][_[:alnum:]]*|[0-9]|[\?@\*#])
28 /* discard leading & trailing whitespace, but keep inter-word delimeters */
31 [ \t]* return TOKEN_DELIM;
34 "[[" return TOKEN_LDSQBRACKET;
35 "]]" return TOKEN_RDSQBRACKET;
36 "case" return TOKEN_CASE;
38 "done" return TOKEN_DONE;
39 "elif" return TOKEN_ELIF;
40 "esac" return TOKEN_ESAC;
42 "for" return TOKEN_FOR;
43 "function" return TOKEN_FUNCTION;
46 "menuentry" return TOKEN_MENUENTRY;
47 "select" return TOKEN_SELECT;
48 "then" return TOKEN_THEN;
49 "time" return TOKEN_TIME;
50 "until" return TOKEN_UTIL;
51 "while" return TOKEN_WHILE;
53 /* anything that's not a metachar: return as a plain word */
55 yylval->word = create_word_text(yyget_extra(yyscanner), yytext);
61 if (yytext[1] == '{') {
62 yytext[yyleng-1] = '\0';
66 yylval->word = create_word_var(yyget_extra(yyscanner), yytext,
71 /* single-quoted strings: return a single, non-expanded word token */
73 yy_push_state(sqstring, yyscanner);
76 yy_pop_state(yyscanner);
79 yylval->word = create_word_text(yyget_extra(yyscanner), yytext);
83 /* double-quoted strings: return a single, expanded word token */
85 yy_push_state(dqstring, yyscanner);
88 yy_pop_state(yyscanner);
90 <dqstring>([^"\$]|\\\")+ {
91 yylval->word = create_word_text(yyget_extra(yyscanner), yytext);
94 <dqstring>\${VARNAME} |
95 <dqstring>\$\{{VARNAME}\} {
96 if (yytext[1] == '{') {
97 yytext[yyleng-1] = '\0';
101 yylval->word = create_word_var(yyget_extra(yyscanner), yytext,
113 [ \t]*(;|\n)[ \t]* return TOKEN_EOL;
119 . printf("unknown token '%s'\n", yytext); exit(1);
125 void *yyalloc(size_t bytes, void *yyscanner)
127 struct grub2_parser *parser = yyget_extra(yyscanner);
128 return talloc_size(parser, bytes);
131 void *yyrealloc(void *ptr, size_t bytes, void *yyscanner)
133 struct grub2_parser *parser = yyget_extra(yyscanner);
134 return talloc_realloc_size(parser, ptr, bytes);
137 void yyfree(void *ptr, void *yyscanner __attribute__((unused)))