3 %lex-param { yyscan_t scanner }
4 %parse-param { struct grub2_parser *parser }
7 #include <talloc/talloc.h>
13 #define YYLEX_PARAM parser->scanner
15 static void yyerror(struct grub2_parser *, char const *s);
19 struct grub2_word *word;
20 struct grub2_argv *argv;
21 struct grub2_statement *statement;
22 struct grub2_statements *statements;
26 %token TOKEN_LDSQBRACKET "[["
27 %token TOKEN_RDSQBRACKET "]]"
28 %token TOKEN_CASE "case"
30 %token TOKEN_DONE "done"
31 %token TOKEN_ELIF "elif"
32 %token TOKEN_ESAC "esac"
34 %token TOKEN_FOR "for"
35 %token TOKEN_FUNCTION "function"
38 %token TOKEN_MENUENTRY "menuentry"
39 %token TOKEN_SELECT "select"
40 %token TOKEN_THEN "then"
41 %token TOKEN_TIME "time"
42 %token TOKEN_UTIL "until"
43 %token TOKEN_WHILE "while"
45 %type <statement> statement
46 %type <statements> statements
53 %token <word> TOKEN_WORD
61 parser->script->statements = $1;
64 statements: statement {
65 $$ = create_statements(parser);
66 statement_append($$, $1);
68 | statements statement {
69 statement_append($1, $2);
73 statement: TOKEN_EOL {
77 $$ = create_statement_simple(parser, $1);
79 | '{' statements '}' {
80 $$ = create_statement_block(parser, $2);
82 | "if" TOKEN_DELIM statement
86 $$ = create_statement_if(parser, $3, $6, NULL);
88 | "menuentry" TOKEN_DELIM words TOKEN_DELIM
91 $$ = create_statement_menuentry(parser, $3, $6);
95 $$ = create_argv(parser);
98 | words TOKEN_DELIM word {
110 void yyerror(struct grub2_parser *parser, char const *s)
112 fprintf(stderr, "%d: error: %s '%s'\n",
113 yyget_lineno(parser->scanner),
114 s, yyget_text(parser->scanner));
117 struct grub2_statements *create_statements(struct grub2_parser *parser)
119 struct grub2_statements *stmts = talloc(parser,
120 struct grub2_statements);
121 list_init(&stmts->list);
125 struct grub2_statement *create_statement_simple(struct grub2_parser *parser,
126 struct grub2_argv *argv)
128 struct grub2_statement_simple *stmt =
129 talloc(parser, struct grub2_statement_simple);
130 stmt->st.type = STMT_TYPE_SIMPLE;
131 stmt->st.exec = statement_simple_execute;
136 struct grub2_statement *create_statement_menuentry(struct grub2_parser *parser,
137 struct grub2_argv *argv, struct grub2_statements *stmts)
139 struct grub2_statement_menuentry *stmt =
140 talloc(parser, struct grub2_statement_menuentry);
141 stmt->st.type = STMT_TYPE_MENUENTRY;
142 stmt->st.exec = statement_menuentry_execute;
144 stmt->statements = stmts;
148 struct grub2_statement *create_statement_if(struct grub2_parser *parser,
149 struct grub2_statement *condition,
150 struct grub2_statements *true_case,
151 struct grub2_statements *false_case)
153 struct grub2_statement_if *stmt =
154 talloc(parser, struct grub2_statement_if);
155 stmt->st.type = STMT_TYPE_IF;
156 stmt->st.exec = statement_if_execute;
157 stmt->condition = condition;
158 stmt->true_case = true_case;
159 stmt->false_case = false_case;
163 struct grub2_statement *create_statement_block(struct grub2_parser *parser,
164 struct grub2_statements *stmts)
166 struct grub2_statement_block *stmt =
167 talloc(parser, struct grub2_statement_block);
168 stmt->st.type = STMT_TYPE_BLOCK;
169 stmt->st.exec = NULL;
170 stmt->statements = stmts;
174 void statement_append(struct grub2_statements *stmts,
175 struct grub2_statement *stmt)
179 list_add_tail(&stmts->list, &stmt->list);
182 struct grub2_word *create_word_text(struct grub2_parser *parser,
185 struct grub2_word *word = talloc(parser, struct grub2_word);
186 word->type = GRUB2_WORD_TEXT;
188 word->text = talloc_strdup(word, text);
194 struct grub2_word *create_word_var(struct grub2_parser *parser,
195 const char *name, bool split)
197 struct grub2_word *word = talloc(parser, struct grub2_word);
198 word->type = GRUB2_WORD_VAR;
199 word->name = talloc_strdup(word, name);
206 struct grub2_argv *create_argv(struct grub2_parser *parser)
208 struct grub2_argv *argv = talloc(parser, struct grub2_argv);
209 list_init(&argv->words);
213 void argv_append(struct grub2_argv *argv, struct grub2_word *word)
215 list_add_tail(&argv->words, &word->argv_list);
218 void word_append(struct grub2_word *w1, struct grub2_word *w2)
224 struct grub2_parser *grub2_parser_create(struct discover_context *ctx)
226 struct grub2_parser *parser;
228 parser = talloc(ctx, struct grub2_parser);
229 yylex_init_extra(parser, &parser->scanner);
230 parser->script = create_script(parser, ctx);
235 void grub2_parser_parse(struct grub2_parser *parser, char *buf, int len)
237 YY_BUFFER_STATE bufstate;
239 bufstate = yy_scan_bytes(buf, len - 1, parser->scanner);
243 yy_delete_buffer(bufstate, parser->scanner);
245 script_execute(parser->script);