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_ELSE "else"
33 %token TOKEN_ESAC "esac"
35 %token TOKEN_FOR "for"
36 %token TOKEN_FUNCTION "function"
39 %token TOKEN_MENUENTRY "menuentry"
40 %token TOKEN_SELECT "select"
41 %token TOKEN_THEN "then"
42 %token TOKEN_TIME "time"
43 %token TOKEN_UTIL "until"
44 %token TOKEN_WHILE "while"
46 %type <statement> statement
47 %type <statements> statements
54 %token <word> TOKEN_WORD
62 parser->script->statements = $1;
65 statements: statement {
66 $$ = create_statements(parser);
67 statement_append($$, $1);
69 | statements statement {
70 statement_append($1, $2);
74 statement: TOKEN_EOL {
78 $$ = create_statement_simple(parser, $1);
80 | '{' statements '}' {
81 $$ = create_statement_block(parser, $2);
83 | "if" TOKEN_DELIM statement
87 $$ = create_statement_if(parser, $3, $6, NULL);
89 | "if" TOKEN_DELIM statement
95 $$ = create_statement_if(parser, $3, $6, $9);
97 | "menuentry" TOKEN_DELIM words TOKEN_DELIM
100 $$ = create_statement_menuentry(parser, $3, $6);
104 $$ = create_argv(parser);
107 | words TOKEN_DELIM word {
119 void yyerror(struct grub2_parser *parser, char const *s)
121 fprintf(stderr, "%d: error: %s '%s'\n",
122 yyget_lineno(parser->scanner),
123 s, yyget_text(parser->scanner));
126 struct grub2_statements *create_statements(struct grub2_parser *parser)
128 struct grub2_statements *stmts = talloc(parser,
129 struct grub2_statements);
130 list_init(&stmts->list);
134 struct grub2_statement *create_statement_simple(struct grub2_parser *parser,
135 struct grub2_argv *argv)
137 struct grub2_statement_simple *stmt =
138 talloc(parser, struct grub2_statement_simple);
139 stmt->st.type = STMT_TYPE_SIMPLE;
140 stmt->st.exec = statement_simple_execute;
145 struct grub2_statement *create_statement_menuentry(struct grub2_parser *parser,
146 struct grub2_argv *argv, struct grub2_statements *stmts)
148 struct grub2_statement_menuentry *stmt =
149 talloc(parser, struct grub2_statement_menuentry);
150 stmt->st.type = STMT_TYPE_MENUENTRY;
151 stmt->st.exec = statement_menuentry_execute;
153 stmt->statements = stmts;
157 struct grub2_statement *create_statement_if(struct grub2_parser *parser,
158 struct grub2_statement *condition,
159 struct grub2_statements *true_case,
160 struct grub2_statements *false_case)
162 struct grub2_statement_if *stmt =
163 talloc(parser, struct grub2_statement_if);
164 stmt->st.type = STMT_TYPE_IF;
165 stmt->st.exec = statement_if_execute;
166 stmt->condition = condition;
167 stmt->true_case = true_case;
168 stmt->false_case = false_case;
172 struct grub2_statement *create_statement_block(struct grub2_parser *parser,
173 struct grub2_statements *stmts)
175 struct grub2_statement_block *stmt =
176 talloc(parser, struct grub2_statement_block);
177 stmt->st.type = STMT_TYPE_BLOCK;
178 stmt->st.exec = NULL;
179 stmt->statements = stmts;
183 void statement_append(struct grub2_statements *stmts,
184 struct grub2_statement *stmt)
188 list_add_tail(&stmts->list, &stmt->list);
191 struct grub2_word *create_word_text(struct grub2_parser *parser,
194 struct grub2_word *word = talloc(parser, struct grub2_word);
195 word->type = GRUB2_WORD_TEXT;
197 word->text = talloc_strdup(word, text);
203 struct grub2_word *create_word_var(struct grub2_parser *parser,
204 const char *name, bool split)
206 struct grub2_word *word = talloc(parser, struct grub2_word);
207 word->type = GRUB2_WORD_VAR;
208 word->name = talloc_strdup(word, name);
215 struct grub2_argv *create_argv(struct grub2_parser *parser)
217 struct grub2_argv *argv = talloc(parser, struct grub2_argv);
218 list_init(&argv->words);
222 void argv_append(struct grub2_argv *argv, struct grub2_word *word)
224 list_add_tail(&argv->words, &word->argv_list);
227 void word_append(struct grub2_word *w1, struct grub2_word *w2)
233 struct grub2_parser *grub2_parser_create(struct discover_context *ctx)
235 struct grub2_parser *parser;
237 parser = talloc(ctx, struct grub2_parser);
238 yylex_init_extra(parser, &parser->scanner);
239 parser->script = create_script(parser, ctx);
244 void grub2_parser_parse(struct grub2_parser *parser, char *buf, int len)
246 YY_BUFFER_STATE bufstate;
248 bufstate = yy_scan_bytes(buf, len - 1, parser->scanner);
252 yy_delete_buffer(bufstate, parser->scanner);
254 script_execute(parser->script);