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