+++ /dev/null
-
-%pure-parser
-%lex-param { yyscan_t scanner }
-%parse-param { struct grub2_parser *parser }
-%parse-param { void *scanner }
-%error-verbose
-
-%{
-#include <talloc/talloc.h>
-#include <log/log.h>
-
-#include "grub2.h"
-
-void yyerror(struct grub2_parser *parser, const char *fmt, ...);
-%}
-
-%union {
- struct grub2_word *word;
- struct grub2_argv *argv;
- struct grub2_statement *statement;
- struct grub2_statements *statements;
-}
-
-/* reserved words */
-%token TOKEN_LDSQBRACKET "[["
-%token TOKEN_RDSQBRACKET "]]"
-%token TOKEN_CASE "case"
-%token TOKEN_DO "do"
-%token TOKEN_DONE "done"
-%token TOKEN_ELIF "elif"
-%token TOKEN_ELSE "else"
-%token TOKEN_ESAC "esac"
-%token TOKEN_FI "fi"
-%token TOKEN_FOR "for"
-%token TOKEN_FUNCTION "function"
-%token TOKEN_IF "if"
-%token TOKEN_IN "in"
-%token TOKEN_MENUENTRY "menuentry"
-%token TOKEN_SELECT "select"
-%token TOKEN_SUBMENU "submenu"
-%token TOKEN_THEN "then"
-%token TOKEN_TIME "time"
-%token TOKEN_UTIL "until"
-%token TOKEN_WHILE "while"
-
-%type <statement> statement
-%type <statements> statements
-%type <statement> conditional
-%type <statement> elif
-%type <statements> elifs
-%type <argv> words
-%type <word> word
-
-/* syntax */
-%token TOKEN_EOL
-%token TOKEN_DELIM
-%token <word> TOKEN_WORD
-%token TOKEN_EOF 0
-
-%start script
-%debug
-
-%{
-#include "lexer.h"
-%}
-
-%%
-
-script: statements {
- parser->script->statements = $1;
- }
-
-eol: TOKEN_EOL | TOKEN_EOF;
-
-statements: /* empty */ {
- $$ = create_statements(parser);
- }
- | statements statement eol {
- statement_append($1, $2);
- $$ = $1;
- }
- | statements TOKEN_EOL {
- $$ = $1;
- }
-
-sep: TOKEN_DELIM | TOKEN_EOL;
-
-conditional: statement TOKEN_EOL "then" sep statements {
- $$ = create_statement_conditional(parser, $1, $5);
- }
-
-elif: "elif" TOKEN_DELIM conditional {
- $$ = $3;
- }
-
-elifs: /* empty */ {
- $$ = create_statements(parser);
- }
- | elifs elif {
- statement_append($1, $2);
- $$ = $1;
- }
-
-statement:
- words {
- $$ = create_statement_simple(parser, $1);
- }
- | '{' statements '}' {
- $$ = create_statement_block(parser, $2);
- }
- | "if" TOKEN_DELIM conditional elifs "fi" {
- $$ = create_statement_if(parser, $3, $4, NULL);
- }
- | "if" TOKEN_DELIM conditional
- elifs
- "else" sep
- statements
- "fi" {
- $$ = create_statement_if(parser, $3, $4, $7);
- }
- | "function" TOKEN_DELIM word TOKEN_DELIM '{' statements '}' {
- $$ = create_statement_function(parser, $3, $6);
- }
- | "menuentry" TOKEN_DELIM words TOKEN_DELIM
- '{' statements '}' {
- $$ = create_statement_menuentry(parser, $3, $6);
- }
- | "submenu" TOKEN_DELIM words TOKEN_DELIM
- '{' statements '}' {
- /* we just flatten everything */
- $$ = create_statement_block(parser, $6);
- }
- | "for" TOKEN_DELIM word TOKEN_DELIM "in" TOKEN_DELIM words TOKEN_EOL
- "do" sep
- statements
- "done" {
- $$ = create_statement_for(parser, $3, $7, $11);
- }
-
-words: word {
- $$ = create_argv(parser);
- argv_append($$, $1);
- }
- | words TOKEN_DELIM word {
- argv_append($1, $3);
- $$ = $1;
- }
-
-word: TOKEN_WORD
- | word TOKEN_WORD {
- word_append($1, $2);
- $$ = $1;
- }
-
-%%
-void yyerror(struct grub2_parser *parser, const char *fmt, ...)
-{
- const char *str;
- va_list ap;
-
- va_start(ap, fmt);
- str = talloc_vasprintf(parser, fmt, ap);
- va_end(ap);
-
- pb_log("parse error: %d('%s'): %s\n", yyget_lineno(parser->scanner),
- yyget_text(parser->scanner), str);
-}
-
-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_conditional(
- struct grub2_parser *parser,
- struct grub2_statement *condition,
- struct grub2_statements *statements)
-{
- struct grub2_statement_conditional *stmt =
- talloc(parser, struct grub2_statement_conditional);
- stmt->st.type = STMT_TYPE_CONDITIONAL;
- stmt->condition = condition;
- stmt->statements = statements;
- return &stmt->st;
-}
-
-struct grub2_statement *create_statement_if(struct grub2_parser *parser,
- struct grub2_statement *conditional,
- struct grub2_statements *elifs,
- struct grub2_statements *else_case)
-{
- struct grub2_statement_if *stmt =
- talloc(parser, struct grub2_statement_if);
-
- list_add(&elifs->list, &conditional->list);
-
- stmt->st.type = STMT_TYPE_IF;
- stmt->st.exec = statement_if_execute;
- stmt->conditionals = elifs;
- stmt->else_case = else_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 = statement_block_execute;
- stmt->statements = stmts;
- return &stmt->st;
-}
-
-struct grub2_statement *create_statement_function(struct grub2_parser *parser,
- struct grub2_word *name, struct grub2_statements *body)
-{
- struct grub2_statement_function *stmt =
- talloc(parser, struct grub2_statement_function);
- stmt->st.exec = statement_function_execute;
- stmt->name = name;
- stmt->body = body;
- return &stmt->st;
-}
-
-struct grub2_statement *create_statement_for(struct grub2_parser *parser,
- struct grub2_word *var, struct grub2_argv *list,
- struct grub2_statements *body)
-{
- struct grub2_statement_for *stmt =
- talloc(parser, struct grub2_statement_for);
- stmt->st.exec = statement_for_execute;
- stmt->var = var;
- stmt->list = list;
- stmt->body = body;
- 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, const char *filename,
- char *buf, int len)
-{
- YY_BUFFER_STATE bufstate;
- int rc;
-
- if (!len)
- return;
-
- parser->script->filename = filename;
-
- bufstate = yy_scan_bytes(buf, len - 1, parser->scanner);
- yyset_lineno(1, parser->scanner);
-
- rc = yyparse(parser, parser->scanner);
-
- yy_delete_buffer(bufstate, parser->scanner);
-
- if (!rc)
- script_execute(parser->script);
-}
-
projects / petitboot / blobdiff