3 %lex-param { yyscan_t scanner }
4 %parse-param { struct grub2_parser *parser }
8 #include <talloc/talloc.h>
14 #define YYLEX_PARAM parser->scanner
16 static void yyerror(struct grub2_parser *, char const *s);
20 struct grub2_word *word;
21 struct grub2_argv *argv;
22 struct grub2_statement *statement;
23 struct grub2_statements *statements;
27 %token TOKEN_LDSQBRACKET "[["
28 %token TOKEN_RDSQBRACKET "]]"
29 %token TOKEN_CASE "case"
31 %token TOKEN_DONE "done"
32 %token TOKEN_ELIF "elif"
33 %token TOKEN_ELSE "else"
34 %token TOKEN_ESAC "esac"
36 %token TOKEN_FOR "for"
37 %token TOKEN_FUNCTION "function"
40 %token TOKEN_MENUENTRY "menuentry"
41 %token TOKEN_SELECT "select"
42 %token TOKEN_THEN "then"
43 %token TOKEN_TIME "time"
44 %token TOKEN_UTIL "until"
45 %token TOKEN_WHILE "while"
47 %type <statement> statement
48 %type <statements> statements
55 %token <word> TOKEN_WORD
63 parser->script->statements = $1;
66 statements: statement {
67 $$ = create_statements(parser);
68 statement_append($$, $1);
70 | statements statement {
71 statement_append($1, $2);
75 statement: TOKEN_EOL {
79 $$ = create_statement_simple(parser, $1);
81 | '{' statements '}' {
82 $$ = create_statement_block(parser, $2);
84 | "if" TOKEN_DELIM statement
88 $$ = create_statement_if(parser, $3, $6, NULL);
90 | "if" TOKEN_DELIM statement
96 $$ = create_statement_if(parser, $3, $6, $9);
98 | "menuentry" TOKEN_DELIM words TOKEN_DELIM
101 $$ = create_statement_menuentry(parser, $3, $6);
105 $$ = create_argv(parser);
108 | words TOKEN_DELIM word {
120 void yyerror(struct grub2_parser *parser, char const *s)
122 fprintf(stderr, "%d: error: %s '%s'\n",
123 yyget_lineno(parser->scanner),
124 s, yyget_text(parser->scanner));
127 struct grub2_statements *create_statements(struct grub2_parser *parser)
129 struct grub2_statements *stmts = talloc(parser,
130 struct grub2_statements);
131 list_init(&stmts->list);
135 struct grub2_statement *create_statement_simple(struct grub2_parser *parser,
136 struct grub2_argv *argv)
138 struct grub2_statement_simple *stmt =
139 talloc(parser, struct grub2_statement_simple);
140 stmt->st.type = STMT_TYPE_SIMPLE;
141 stmt->st.exec = statement_simple_execute;
146 struct grub2_statement *create_statement_menuentry(struct grub2_parser *parser,
147 struct grub2_argv *argv, struct grub2_statements *stmts)
149 struct grub2_statement_menuentry *stmt =
150 talloc(parser, struct grub2_statement_menuentry);
151 stmt->st.type = STMT_TYPE_MENUENTRY;
152 stmt->st.exec = statement_menuentry_execute;
154 stmt->statements = stmts;
158 struct grub2_statement *create_statement_if(struct grub2_parser *parser,
159 struct grub2_statement *condition,
160 struct grub2_statements *true_case,
161 struct grub2_statements *false_case)
163 struct grub2_statement_if *stmt =
164 talloc(parser, struct grub2_statement_if);
165 stmt->st.type = STMT_TYPE_IF;
166 stmt->st.exec = statement_if_execute;
167 stmt->condition = condition;
168 stmt->true_case = true_case;
169 stmt->false_case = false_case;
173 struct grub2_statement *create_statement_block(struct grub2_parser *parser,
174 struct grub2_statements *stmts)
176 struct grub2_statement_block *stmt =
177 talloc(parser, struct grub2_statement_block);
178 stmt->st.type = STMT_TYPE_BLOCK;
179 stmt->st.exec = NULL;
180 stmt->statements = stmts;
184 void statement_append(struct grub2_statements *stmts,
185 struct grub2_statement *stmt)
189 list_add_tail(&stmts->list, &stmt->list);
192 struct grub2_word *create_word_text(struct grub2_parser *parser,
195 struct grub2_word *word = talloc(parser, struct grub2_word);
196 word->type = GRUB2_WORD_TEXT;
198 word->text = talloc_strdup(word, text);
204 struct grub2_word *create_word_var(struct grub2_parser *parser,
205 const char *name, bool split)
207 struct grub2_word *word = talloc(parser, struct grub2_word);
208 word->type = GRUB2_WORD_VAR;
209 word->name = talloc_strdup(word, name);
216 struct grub2_argv *create_argv(struct grub2_parser *parser)
218 struct grub2_argv *argv = talloc(parser, struct grub2_argv);
219 list_init(&argv->words);
223 void argv_append(struct grub2_argv *argv, struct grub2_word *word)
225 list_add_tail(&argv->words, &word->argv_list);
228 void word_append(struct grub2_word *w1, struct grub2_word *w2)
234 struct grub2_parser *grub2_parser_create(struct discover_context *ctx)
236 struct grub2_parser *parser;
238 parser = talloc(ctx, struct grub2_parser);
239 yylex_init_extra(parser, &parser->scanner);
240 parser->script = create_script(parser, ctx);
245 void grub2_parser_parse(struct grub2_parser *parser, char *buf, int len)
247 YY_BUFFER_STATE bufstate;
250 bufstate = yy_scan_bytes(buf, len - 1, parser->scanner);
252 rc = yyparse(parser);
254 yy_delete_buffer(bufstate, parser->scanner);
257 script_execute(parser->script);