#include <stdbool.h>
#include <list/list.h>
-struct grub2_parser;
+struct grub2_script;
struct grub2_word {
const char *text;
STMT_TYPE_IF,
STMT_TYPE_BLOCK,
} type;
+ int (*exec)(struct grub2_script *,
+ struct grub2_statement *);
};
struct grub2_statement_simple {
void word_append(struct grub2_word *w1, struct grub2_word *w2);
/* script interface */
+void script_execute(struct grub2_script *script);
+
+int statement_simple_execute(struct grub2_script *script,
+ struct grub2_statement *statement);
+int statement_if_execute(struct grub2_script *script,
+ struct grub2_statement *statement);
struct grub2_script *create_script(void *ctx);
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_menuentry *stmt =
talloc(parser, struct grub2_statement_menuentry);
stmt->st.type = STMT_TYPE_MENUENTRY;
+ stmt->st.exec = NULL;
stmt->argv = argv;
stmt->statements = stmts;
return &stmt->st;
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;
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;
}
#include "grub2.h"
+#define to_stmt_simple(stmt) \
+ container_of(stmt, struct grub2_statement_simple, st)
+#define to_stmt_if(stmt) \
+ container_of(stmt, struct grub2_statement_if, st)
+
struct env_entry {
const char *name;
const char *value;
src = word->text;
n = regexec(&script->var_re, src, 1, &match, 0);
- if (n == 0)
+ printf("%s %s: %d\n", __func__, word->text, n);
+ if (n != 0)
return false;
val = env_lookup(script, src + match.rm_so,
match.rm_eo - match.rm_so);
- if (val)
+ if (!val)
val = "";
dest = talloc_strndup(script, src, match.rm_so);
}
}
+int statements_execute(struct grub2_script *script,
+ struct grub2_statements *stmts)
+{
+ struct grub2_statement *stmt;
+ int rc = 0;
+
+ list_for_each_entry(&stmts->list, stmt, list) {
+ if (stmt->exec)
+ rc = stmt->exec(script, stmt);
+ printf("%s(%p)\n", __func__, stmt);
+ }
+ return rc;
+}
+
+int statement_simple_execute(struct grub2_script *script,
+ struct grub2_statement *statement)
+{
+ struct grub2_statement_simple *st = to_stmt_simple(statement);
+
+ if (!st->argv)
+ return 0;
+
+ process_expansions(script, st->argv);
+
+ return 0;
+}
+
+int statement_if_execute(struct grub2_script *script,
+ struct grub2_statement *statement)
+{
+ struct grub2_statement_if *st = to_stmt_if(statement);
+ struct grub2_statements *case_stmts;
+ int rc;
+
+ rc = st->condition->exec(script, st->condition);
+
+ if (rc == 0)
+ case_stmts = st->true_case;
+ else
+ case_stmts = st->false_case;
+
+ if (case_stmts)
+ statements_execute(script, case_stmts);
+ else
+ rc = 0;
+
+ return rc;
+}
+
+
+void script_execute(struct grub2_script *script)
+{
+ statements_execute(script, script->statements);
+}
+
static int script_destroy(void *p)
{
struct grub2_script *script = p;