X-Git-Url: http://git.ozlabs.org/?p=petitboot;a=blobdiff_plain;f=discover%2Fgrub2%2Fgrub2.h;h=e79bf41d4b655598a3019394a0c2f5ccbbac0ca3;hp=2c7951a5520c90e4c5b5040f6da81fedc634cb6e;hb=a1fb38f17bfa60aac89d0dd21dd8ccc739d794bf;hpb=1284a547ec73795d7d76dc099426fb89c3359f25 diff --git a/discover/grub2/grub2.h b/discover/grub2/grub2.h index 2c7951a..e79bf41 100644 --- a/discover/grub2/grub2.h +++ b/discover/grub2/grub2.h @@ -1,61 +1,114 @@ #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 { + struct list list; +}; + +struct grub2_statement { + struct list_item list; + enum { + STMT_TYPE_SIMPLE, + 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 { + struct grub2_statement st; struct grub2_argv *argv; }; struct grub2_statement_menuentry { + struct grub2_statement st; struct grub2_argv *argv; 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 { - struct list_item list; - enum { - STMT_TYPE_SIMPLE, - STMT_TYPE_MENUENTRY, - STMT_TYPE_IF, - } type; - union { - struct grub2_statement_simple simple; - struct grub2_statement_menuentry menuentry; - struct grub2_statement_if ifstmt; - }; +struct grub2_statement_if { + struct grub2_statement st; + struct grub2_statements *conditionals; + struct grub2_statements *else_case; }; -struct grub2_statements { - struct list list; +struct grub2_statement_block { + struct grub2_statement st; + 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 list environment; + struct list symtab; + struct discover_context *ctx; + struct discover_boot_option *opt; + const char *filename; + unsigned int n_options; }; struct grub2_parser { void *scanner; - struct grub2_statements *statements; + 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, @@ -64,13 +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_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(struct grub2_parser *parser, const char *text, - bool expand, bool split); +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); @@ -81,5 +151,46 @@ void argv_append(struct grub2_argv *argv, struct grub2_word *word); 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_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 */