git.ozlabs.org Git - petitboot/blob - discover/grub2/grub2.h

   1 #ifndef GRUB2_H
   2 #define GRUB2_H
   3
   4 #include <stdbool.h>
   5 #include <list/list.h>
   6
   7 struct grub2_script;
   8
   9 struct grub2_word {
  10         enum {
  11                 GRUB2_WORD_TEXT,
  12                 GRUB2_WORD_VAR,
  13         } type;
  14         union {
  15                 char    *text;
  16                 struct {
  17                         const char      *name;
  18                         bool            split;
  19                 } var;
  20         };
  21         struct grub2_word       *next;
  22         struct grub2_word       *last;
  23         struct list_item        argv_list;
  24 };
  25
  26 struct grub2_argv {
  27         struct list             words;
  28 };
  29
  30 struct grub2_statements {
  31         struct list             list;
  32 };
  33
  34 struct grub2_statement {
  35         struct list_item        list;
  36         enum {
  37                 STMT_TYPE_SIMPLE,
  38                 STMT_TYPE_MENUENTRY,
  39                 STMT_TYPE_IF,
  40                 STMT_TYPE_BLOCK,
  41         } type;
  42         int                     (*exec)(struct grub2_script *,
  43                                         struct grub2_statement *);
  44 };
  45
  46 struct grub2_statement_simple {
  47         struct grub2_statement  st;
  48         struct grub2_argv       *argv;
  49 };
  50
  51 struct grub2_statement_menuentry {
  52         struct grub2_statement  st;
  53         struct grub2_argv       *argv;
  54         struct grub2_statements *statements;
  55 };
  56
  57 struct grub2_statement_if {
  58         struct grub2_statement  st;
  59         struct grub2_statement  *condition;
  60         struct grub2_statements *true_case;
  61         struct grub2_statements *false_case;
  62 };
  63
  64 struct grub2_statement_block {
  65         struct grub2_statement  st;
  66         struct grub2_statements *statements;
  67 };
  68
  69 struct grub2_script {
  70         struct grub2_statements *statements;
  71         struct list             environment;
  72 };
  73
  74 struct grub2_parser {
  75         void                    *scanner;
  76         struct grub2_script     *script;
  77 };
  78
  79 struct grub2_statements *create_statements(struct grub2_parser *parser);
  80
  81 struct grub2_statement *create_statement_simple(struct grub2_parser *parser,
  82                 struct grub2_argv *argv);
  83
  84 struct grub2_statement *create_statement_menuentry(struct grub2_parser *parser,
  85                 struct grub2_argv *argv, struct grub2_statements *stmts);
  86
  87 struct grub2_statement *create_statement_if(struct grub2_parser *parser,
  88                 struct grub2_statement *condition,
  89                 struct grub2_statements *true_case,
  90                 struct grub2_statements *false_case);
  91
  92 struct grub2_statement *create_statement_block(struct grub2_parser *parser,
  93                 struct grub2_statements *stmts);
  94
  95 struct grub2_word *create_word_text(struct grub2_parser *parser,
  96                 const char *text);
  97
  98 struct grub2_word *create_word_var(struct grub2_parser *parser,
  99                 const char *name, bool split);
 100
 101 struct grub2_argv *create_argv(struct grub2_parser *parser);
 102
 103 void statement_append(struct grub2_statements *stmts,
 104                 struct grub2_statement *stmt);
 105
 106 void argv_append(struct grub2_argv *argv, struct grub2_word *word);
 107
 108 void word_append(struct grub2_word *w1, struct grub2_word *w2);
 109
 110 /* script interface */
 111 void script_execute(struct grub2_script *script);
 112
 113 int statement_simple_execute(struct grub2_script *script,
 114                 struct grub2_statement *statement);
 115 int statement_if_execute(struct grub2_script *script,
 116                 struct grub2_statement *statement);
 117
 118 struct grub2_script *create_script(void *ctx);
 119
 120 #endif /* GRUB2_H */
 121