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                 const char      *name;
  17         };
  18         bool                    split;
  19         struct grub2_word       *next;
  20         struct grub2_word       *last;
  21         struct list_item        argv_list;
  22 };
  23
  24 struct grub2_argv {
  25         struct list             words;
  26
  27         /* postprocessing (with process_expansions) populates these to hand to
  28          * the grub2_command callbacks */
  29         char                    **argv;
  30         int                     argc;
  31 };
  32
  33 struct grub2_statements {
  34         struct list             list;
  35 };
  36
  37 struct grub2_statement {
  38         struct list_item        list;
  39         enum {
  40                 STMT_TYPE_SIMPLE,
  41                 STMT_TYPE_MENUENTRY,
  42                 STMT_TYPE_IF,
  43                 STMT_TYPE_BLOCK,
  44         } type;
  45         int                     (*exec)(struct grub2_script *,
  46                                         struct grub2_statement *);
  47 };
  48
  49 struct grub2_statement_simple {
  50         struct grub2_statement  st;
  51         struct grub2_argv       *argv;
  52 };
  53
  54 struct grub2_statement_menuentry {
  55         struct grub2_statement  st;
  56         struct grub2_argv       *argv;
  57         struct grub2_statements *statements;
  58 };
  59
  60 struct grub2_statement_if {
  61         struct grub2_statement  st;
  62         struct grub2_statement  *condition;
  63         struct grub2_statements *true_case;
  64         struct grub2_statements *false_case;
  65 };
  66
  67 struct grub2_statement_block {
  68         struct grub2_statement  st;
  69         struct grub2_statements *statements;
  70 };
  71
  72 struct grub2_command {
  73         const char              *name;
  74         int                     (*exec)(struct grub2_script *script,
  75                                         int argc, char *argv[]);
  76         struct list_item        list;
  77 };
  78
  79 struct grub2_script {
  80         struct grub2_statements *statements;
  81         struct list             environment;
  82         struct list             commands;
  83         struct list             symtab;
  84 };
  85
  86 struct grub2_parser {
  87         void                    *scanner;
  88         struct grub2_script     *script;
  89 };
  90
  91 struct grub2_statements *create_statements(struct grub2_parser *parser);
  92
  93 struct grub2_statement *create_statement_simple(struct grub2_parser *parser,
  94                 struct grub2_argv *argv);
  95
  96 struct grub2_statement *create_statement_menuentry(struct grub2_parser *parser,
  97                 struct grub2_argv *argv, struct grub2_statements *stmts);
  98
  99 struct grub2_statement *create_statement_if(struct grub2_parser *parser,
 100                 struct grub2_statement *condition,
 101                 struct grub2_statements *true_case,
 102                 struct grub2_statements *false_case);
 103
 104 struct grub2_statement *create_statement_block(struct grub2_parser *parser,
 105                 struct grub2_statements *stmts);
 106
 107 struct grub2_word *create_word_text(struct grub2_parser *parser,
 108                 const char *text);
 109
 110 struct grub2_word *create_word_var(struct grub2_parser *parser,
 111                 const char *name, bool split);
 112
 113 struct grub2_argv *create_argv(struct grub2_parser *parser);
 114
 115 void statement_append(struct grub2_statements *stmts,
 116                 struct grub2_statement *stmt);
 117
 118 void argv_append(struct grub2_argv *argv, struct grub2_word *word);
 119
 120 void word_append(struct grub2_word *w1, struct grub2_word *w2);
 121
 122 /* script interface */
 123 void script_execute(struct grub2_script *script);
 124
 125 int statement_simple_execute(struct grub2_script *script,
 126                 struct grub2_statement *statement);
 127 int statement_if_execute(struct grub2_script *script,
 128                 struct grub2_statement *statement);
 129 int statement_menuentry_execute(struct grub2_script *script,
 130                 struct grub2_statement *statement);
 131
 132 struct grub2_script *create_script(void *ctx);
 133
 134 const char *script_env_get(struct grub2_script *script, const char *name);
 135
 136 void script_env_set(struct grub2_script *script,
 137                 const char *name, const char *value);
 138
 139 void script_register_command(struct grub2_script *script,
 140                 struct grub2_command *command);
 141
 142 struct grub2_command *script_lookup_command(struct grub2_script *script,
 143                 const char *name);
 144
 145 void register_builtins(struct grub2_script *script);
 146 #endif /* GRUB2_H */
 147