X-Git-Url: http://git.ozlabs.org/?p=petitboot;a=blobdiff_plain;f=discover%2Fgrub2%2Fgrub2.h;h=e79bf41d4b655598a3019394a0c2f5ccbbac0ca3;hp=f3ad2e5b48491e30eb5d15c025d8c617e3b13284;hb=ae3c354e844698bdb4ed35a6845aa9dca1e9205f;hpb=59747ee01e0158f97bdf8c182305e757d90a8d7a diff --git a/discover/grub2/grub2.h b/discover/grub2/grub2.h index f3ad2e5..e79bf41 100644 --- a/discover/grub2/grub2.h +++ b/discover/grub2/grub2.h @@ -1,21 +1,35 @@ #ifndef GRUB2_H #define GRUB2_H +#include + #include #include -struct grub2_parser; +struct grub2_script; struct grub2_word { - const char *text; - bool expand; + enum { + GRUB2_WORD_TEXT, + GRUB2_WORD_VAR, + } type; + union { + char *text; + const char *name; + }; bool split; struct grub2_word *next; + struct grub2_word *last; struct list_item argv_list; }; struct grub2_argv { struct list words; + + /* postprocessing (with process_expansions) populates these to hand to + * the grub2_command callbacks */ + char **argv; + int argc; }; struct grub2_statements { @@ -29,7 +43,10 @@ struct grub2_statement { STMT_TYPE_MENUENTRY, STMT_TYPE_IF, STMT_TYPE_BLOCK, + STMT_TYPE_CONDITIONAL, } type; + int (*exec)(struct grub2_script *, + struct grub2_statement *); }; struct grub2_statement_simple { @@ -43,11 +60,16 @@ struct grub2_statement_menuentry { struct grub2_statements *statements; }; -struct grub2_statement_if { +struct grub2_statement_conditional { struct grub2_statement st; struct grub2_statement *condition; - struct grub2_statements *true_case; - struct grub2_statements *false_case; + struct grub2_statements *statements; +}; + +struct grub2_statement_if { + struct grub2_statement st; + struct grub2_statements *conditionals; + struct grub2_statements *else_case; }; struct grub2_statement_block { @@ -55,8 +77,27 @@ struct grub2_statement_block { struct grub2_statements *statements; }; +struct grub2_statement_function { + struct grub2_statement st; + struct grub2_word *name; + struct grub2_statements *body; +}; + +struct grub2_statement_for { + struct grub2_statement st; + struct grub2_word *var; + struct grub2_argv *list; + struct grub2_statements *body; +}; + struct grub2_script { - struct grub2_statements *statements; + struct grub2_statements *statements; + struct list environment; + struct list symtab; + struct discover_context *ctx; + struct discover_boot_option *opt; + const char *filename; + unsigned int n_options; }; struct grub2_parser { @@ -64,6 +105,10 @@ struct grub2_parser { struct grub2_script *script; }; +/* type for builtin functions */ +typedef int (*grub2_function)(struct grub2_script *script, void *data, + int argc, char *argv[]); + struct grub2_statements *create_statements(struct grub2_parser *parser); struct grub2_statement *create_statement_simple(struct grub2_parser *parser, @@ -72,16 +117,30 @@ struct grub2_statement *create_statement_simple(struct grub2_parser *parser, struct grub2_statement *create_statement_menuentry(struct grub2_parser *parser, struct grub2_argv *argv, struct grub2_statements *stmts); +struct grub2_statement *create_statement_conditional( + struct grub2_parser *parser, struct grub2_statement *condition, + struct grub2_statements *statements); + 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 *conditional, + struct grub2_statements *elifs, + struct grub2_statements *else_case); struct grub2_statement *create_statement_block(struct grub2_parser *parser, struct grub2_statements *stmts); -struct grub2_word *create_word(struct grub2_parser *parser, const char *text, - bool expand, bool split); +struct grub2_statement *create_statement_function(struct grub2_parser *parser, + struct grub2_word *name, struct grub2_statements *body); + +struct grub2_statement *create_statement_for(struct grub2_parser *parser, + struct grub2_word *var, struct grub2_argv *list, + struct grub2_statements *body); + +struct grub2_word *create_word_text(struct grub2_parser *parser, + const char *text); + +struct grub2_word *create_word_var(struct grub2_parser *parser, + const char *name, bool split); struct grub2_argv *create_argv(struct grub2_parser *parser); @@ -93,8 +152,45 @@ void argv_append(struct grub2_argv *argv, struct grub2_word *word); void word_append(struct grub2_word *w1, struct grub2_word *w2); /* script interface */ - -struct grub2_script *create_script(void *ctx); - +void script_execute(struct grub2_script *script); + +int statement_simple_execute(struct grub2_script *script, + struct grub2_statement *statement); +int statement_block_execute(struct grub2_script *script, + struct grub2_statement *statement); +int statement_if_execute(struct grub2_script *script, + struct grub2_statement *statement); +int statement_menuentry_execute(struct grub2_script *script, + struct grub2_statement *statement); +int statement_function_execute(struct grub2_script *script, + struct grub2_statement *statement); +int statement_for_execute(struct grub2_script *script, + struct grub2_statement *statement); + +struct grub2_script *create_script(struct grub2_parser *parser, + struct discover_context *ctx); + +const char *script_env_get(struct grub2_script *script, const char *name); + +void script_env_set(struct grub2_script *script, + const char *name, const char *value); + +void script_register_function(struct grub2_script *script, + const char *name, grub2_function fn, void *data); + +void register_builtins(struct grub2_script *script); + +/* resources */ +struct resource *create_grub2_resource(struct discover_boot_option *opt, + struct discover_device *orig_device, + const char *root, const char *path); + +bool resolve_grub2_resource(struct device_handler *handler, + struct resource *res); + +/* external parser api */ +struct grub2_parser *grub2_parser_create(struct discover_context *ctx); +void grub2_parser_parse(struct grub2_parser *parser, const char *filename, + char *buf, int len); #endif /* GRUB2_H */