%parse-param { struct grub2_parser *parser }
%{
+#include <talloc/talloc.h>
+
#include "grub2.h"
#include "parser.h"
#include "lexer.h"
%}
%union {
- struct {
- char *strval;
- int expand;
- int split;
- };
+ struct grub2_word *word;
+ struct grub2_argv *argv;
+ struct grub2_statement *statement;
+ struct grub2_statements *statements;
}
/* reserved words */
%token TOKEN_UTIL "until"
%token TOKEN_WHILE "while"
+%type <statement> statement
+%type <statements> statements
+%type <argv> words
+%type <word> word
+
/* syntax */
%token TOKEN_EOL
%token TOKEN_DELIM
-%token TOKEN_WORD
+%token <word> TOKEN_WORD
%start script
%debug
%%
-script: statements
- ;
+script: statements {
+ parser->script->statements = $1;
+ }
-statements: statement
- | statements statement
- ;
+statements: statement {
+ $$ = create_statements(parser);
+ statement_append($$, $1);
+ }
+ | statements statement {
+ statement_append($1, $2);
+ $$ = $1;
+ }
-statement: TOKEN_EOL
- | words TOKEN_EOL
- | '{' statements '}'
+statement: TOKEN_EOL {
+ $$ = NULL;
+ }
+ | words TOKEN_EOL {
+ $$ = create_statement_simple(parser, $1);
+ }
+ | '{' statements '}' {
+ $$ = create_statement_block(parser, $2);
+ }
| "if" TOKEN_DELIM statement
"then" TOKEN_EOL
statements
- "fi" TOKEN_EOL
+ "fi" TOKEN_EOL {
+ $$ = create_statement_if(parser, $3, $6, NULL);
+ }
| "menuentry" TOKEN_DELIM words TOKEN_DELIM
'{' statements '}'
- TOKEN_EOL
- ;
+ TOKEN_EOL {
+ $$ = create_statement_menuentry(parser, $3, $6);
+ }
-words: | word
- | words TOKEN_DELIM word
- ;
+words: word {
+ $$ = create_argv(parser);
+ argv_append($$, $1);
+ }
+ | words TOKEN_DELIM word {
+ argv_append($1, $3);
+ $$ = $1;
+ }
word: TOKEN_WORD
- | word TOKEN_WORD
- ;
+ | word TOKEN_WORD {
+ word_append($1, $2);
+ $$ = $1;
+ }
%%
void yyerror(struct grub2_parser *parser, char const *s)
yyget_lineno(parser->scanner),
s, yyget_text(parser->scanner));
}
+
+struct grub2_statements *create_statements(struct grub2_parser *parser)
+{
+ struct grub2_statements *stmts = talloc(parser,
+ struct grub2_statements);
+ list_init(&stmts->list);
+ return stmts;
+}
+
+struct grub2_statement *create_statement_simple(struct grub2_parser *parser,
+ struct grub2_argv *argv)
+{
+ struct grub2_statement_simple *stmt =
+ talloc(parser, struct grub2_statement_simple);
+ stmt->st.type = STMT_TYPE_SIMPLE;
+ stmt->st.exec = statement_simple_execute;
+ stmt->argv = argv;
+ return &stmt->st;
+}
+
+struct grub2_statement *create_statement_menuentry(struct grub2_parser *parser,
+ struct grub2_argv *argv, struct grub2_statements *stmts)
+{
+ struct grub2_statement_menuentry *stmt =
+ talloc(parser, struct grub2_statement_menuentry);
+ stmt->st.type = STMT_TYPE_MENUENTRY;
+ stmt->st.exec = statement_menuentry_execute;
+ stmt->argv = argv;
+ stmt->statements = stmts;
+ return &stmt->st;
+}
+
+struct grub2_statement *create_statement_if(struct grub2_parser *parser,
+ struct grub2_statement *condition,
+ struct grub2_statements *true_case,
+ struct grub2_statements *false_case)
+{
+ struct grub2_statement_if *stmt =
+ talloc(parser, struct grub2_statement_if);
+ stmt->st.type = STMT_TYPE_IF;
+ stmt->st.exec = statement_if_execute;
+ stmt->condition = condition;
+ stmt->true_case = true_case;
+ stmt->false_case = false_case;
+ return &stmt->st;
+}
+
+struct grub2_statement *create_statement_block(struct grub2_parser *parser,
+ struct grub2_statements *stmts)
+{
+ struct grub2_statement_block *stmt =
+ talloc(parser, struct grub2_statement_block);
+ stmt->st.type = STMT_TYPE_BLOCK;
+ stmt->st.exec = NULL;
+ stmt->statements = stmts;
+ return &stmt->st;
+}
+
+void statement_append(struct grub2_statements *stmts,
+ struct grub2_statement *stmt)
+{
+ if (!stmt)
+ return;
+ list_add_tail(&stmts->list, &stmt->list);
+}
+
+struct grub2_word *create_word_text(struct grub2_parser *parser,
+ const char *text)
+{
+ struct grub2_word *word = talloc(parser, struct grub2_word);
+ word->type = GRUB2_WORD_TEXT;
+ word->split = false;
+ word->text = talloc_strdup(word, text);
+ word->next = NULL;
+ word->last = word;
+ return word;
+}
+
+struct grub2_word *create_word_var(struct grub2_parser *parser,
+ const char *name, bool split)
+{
+ struct grub2_word *word = talloc(parser, struct grub2_word);
+ word->type = GRUB2_WORD_VAR;
+ word->name = talloc_strdup(word, name);
+ word->split = split;
+ word->next = NULL;
+ word->last = word;
+ return word;
+}
+
+struct grub2_argv *create_argv(struct grub2_parser *parser)
+{
+ struct grub2_argv *argv = talloc(parser, struct grub2_argv);
+ list_init(&argv->words);
+ return argv;
+}
+
+void argv_append(struct grub2_argv *argv, struct grub2_word *word)
+{
+ list_add_tail(&argv->words, &word->argv_list);
+}
+
+void word_append(struct grub2_word *w1, struct grub2_word *w2)
+{
+ w1->last->next = w2;
+ w1->last = w2;
+}
+
+struct grub2_parser *grub2_parser_create(struct discover_context *ctx)
+{
+ struct grub2_parser *parser;
+
+ parser = talloc(ctx, struct grub2_parser);
+ yylex_init_extra(parser, &parser->scanner);
+ parser->script = create_script(parser, ctx);
+
+ return parser;
+}
+
+void grub2_parser_parse(struct grub2_parser *parser, char *buf, int len)
+{
+ YY_BUFFER_STATE bufstate;
+
+ bufstate = yy_scan_bytes(buf, len - 1, parser->scanner);
+
+ yyparse(parser);
+
+ yy_delete_buffer(bufstate, parser->scanner);
+
+ script_execute(parser->script);
+}
+
projects / petitboot / blobdiff