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expr.h 7.5 KB

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  1. /*
  2. * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
  3. * Released under the terms of the GNU GPL v2.0.
  4. */
  5. #ifndef EXPR_H
  6. #define EXPR_H
  7. #ifdef __cplusplus
  8. extern "C" {
  9. #endif
  10. #include <assert.h>
  11. #include <stdio.h>
  12. #include "list.h"
  13. #ifndef __cplusplus
  14. #include <stdbool.h>
  15. #endif
  16. struct file {
  17. struct file *next;
  18. struct file *parent;
  19. const char *name;
  20. int lineno;
  21. };
  22. typedef enum tristate {
  23. no, mod, yes
  24. } tristate;
  25. enum expr_type {
  26. E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_LIST, E_SYMBOL, E_RANGE
  27. };
  28. union expr_data {
  29. struct expr *expr;
  30. struct symbol *sym;
  31. };
  32. struct expr {
  33. enum expr_type type;
  34. union expr_data left, right;
  35. };
  36. #define EXPR_OR(dep1, dep2) (((dep1)>(dep2))?(dep1):(dep2))
  37. #define EXPR_AND(dep1, dep2) (((dep1)<(dep2))?(dep1):(dep2))
  38. #define EXPR_NOT(dep) (2-(dep))
  39. #define expr_list_for_each_sym(l, e, s) \
  40. for (e = (l); e && (s = e->right.sym); e = e->left.expr)
  41. struct expr_value {
  42. struct expr *expr;
  43. tristate tri;
  44. };
  45. struct expr_select_value {
  46. struct expr *expr;
  47. tristate tri;
  48. struct expr *value;
  49. struct expr_select_value *next;
  50. };
  51. struct symbol_value {
  52. void *val;
  53. tristate tri;
  54. };
  55. enum symbol_type {
  56. S_UNKNOWN, S_BOOLEAN, S_TRISTATE, S_INT, S_HEX, S_STRING, S_OTHER
  57. };
  58. /* enum values are used as index to symbol.def[] */
  59. enum {
  60. S_DEF_USER, /* main user value */
  61. S_DEF_AUTO, /* values read from auto.conf */
  62. S_DEF_DEF3, /* Reserved for UI usage */
  63. S_DEF_DEF4, /* Reserved for UI usage */
  64. S_DEF_COUNT
  65. };
  66. struct symbol {
  67. struct symbol *next;
  68. char *name;
  69. enum symbol_type type;
  70. struct symbol_value curr;
  71. struct symbol_value def[S_DEF_COUNT];
  72. tristate visible;
  73. int flags;
  74. struct property *prop;
  75. struct expr_value dir_dep;
  76. struct expr_value rev_dep;
  77. struct expr_select_value *val_dep;
  78. };
  79. #define for_all_symbols(i, sym) for (i = 0; i < SYMBOL_HASHSIZE; i++) for (sym = symbol_hash[i]; sym; sym = sym->next) if (sym->type != S_OTHER)
  80. #define SYMBOL_CONST 0x0001 /* symbol is const */
  81. #define SYMBOL_CHECK 0x0008 /* used during dependency checking */
  82. #define SYMBOL_CHOICE 0x0010 /* start of a choice block (null name) */
  83. #define SYMBOL_CHOICEVAL 0x0020 /* used as a value in a choice block */
  84. #define SYMBOL_VALID 0x0080 /* set when symbol.curr is calculated */
  85. #define SYMBOL_OPTIONAL 0x0100 /* choice is optional - values can be 'n' */
  86. #define SYMBOL_WRITE 0x0200 /* write symbol to file (KCONFIG_CONFIG) */
  87. #define SYMBOL_CHANGED 0x0400 /* ? */
  88. #define SYMBOL_AUTO 0x1000 /* value from environment variable */
  89. #define SYMBOL_CHECKED 0x2000 /* used during dependency checking */
  90. #define SYMBOL_WARNED 0x8000 /* warning has been issued */
  91. /* Set when symbol.def[] is used */
  92. #define SYMBOL_DEF 0x10000 /* First bit of SYMBOL_DEF */
  93. #define SYMBOL_DEF_USER 0x10000 /* symbol.def[S_DEF_USER] is valid */
  94. #define SYMBOL_DEF_AUTO 0x20000 /* symbol.def[S_DEF_AUTO] is valid */
  95. #define SYMBOL_DEF3 0x40000 /* symbol.def[S_DEF_3] is valid */
  96. #define SYMBOL_DEF4 0x80000 /* symbol.def[S_DEF_4] is valid */
  97. /* choice values need to be set before calculating this symbol value */
  98. #define SYMBOL_NEED_SET_CHOICE_VALUES 0x100000
  99. /* Set symbol to y if allnoconfig; used for symbols that hide others */
  100. #define SYMBOL_ALLNOCONFIG_Y 0x200000
  101. #define SYMBOL_MAXLENGTH 256
  102. #define SYMBOL_HASHSIZE 9973
  103. /* A property represent the config options that can be associated
  104. * with a config "symbol".
  105. * Sample:
  106. * config FOO
  107. * default y
  108. * prompt "foo prompt"
  109. * select BAR
  110. * config BAZ
  111. * int "BAZ Value"
  112. * range 1..255
  113. */
  114. enum prop_type {
  115. P_UNKNOWN,
  116. P_PROMPT, /* prompt "foo prompt" or "BAZ Value" */
  117. P_COMMENT, /* text associated with a comment */
  118. P_MENU, /* prompt associated with a menuconfig option */
  119. P_DEFAULT, /* default y */
  120. P_CHOICE, /* choice value */
  121. P_SELECT, /* select BAR */
  122. P_RANGE, /* range 7..100 (for a symbol) */
  123. P_ENV, /* value from environment variable */
  124. P_SYMBOL, /* where a symbol is defined */
  125. };
  126. struct property {
  127. struct property *next; /* next property - null if last */
  128. struct symbol *sym; /* the symbol for which the property is associated */
  129. enum prop_type type; /* type of property */
  130. const char *text; /* the prompt value - P_PROMPT, P_MENU, P_COMMENT */
  131. struct expr_value visible;
  132. struct expr *expr; /* the optional conditional part of the property */
  133. struct menu *menu; /* the menu the property are associated with
  134. * valid for: P_SELECT, P_RANGE, P_CHOICE,
  135. * P_PROMPT, P_DEFAULT, P_MENU, P_COMMENT */
  136. struct file *file; /* what file was this property defined */
  137. int lineno; /* what lineno was this property defined */
  138. struct expr *value; /* the optional P_SELECT value */
  139. };
  140. #define for_all_properties(sym, st, tok) \
  141. for (st = sym->prop; st; st = st->next) \
  142. if (st->type == (tok))
  143. #define for_all_defaults(sym, st) for_all_properties(sym, st, P_DEFAULT)
  144. #define for_all_choices(sym, st) for_all_properties(sym, st, P_CHOICE)
  145. #define for_all_prompts(sym, st) \
  146. for (st = sym->prop; st; st = st->next) \
  147. if (st->text)
  148. struct menu {
  149. struct menu *next;
  150. struct menu *parent;
  151. struct menu *list;
  152. struct symbol *sym;
  153. struct property *prompt;
  154. struct expr *visibility;
  155. struct expr *dep;
  156. unsigned int flags;
  157. char *help;
  158. struct file *file;
  159. int lineno;
  160. void *data;
  161. };
  162. #define MENU_CHANGED 0x0001
  163. #define MENU_ROOT 0x0002
  164. struct jump_key {
  165. struct list_head entries;
  166. size_t offset;
  167. struct menu *target;
  168. int index;
  169. };
  170. #define JUMP_NB 9
  171. extern struct file *file_list;
  172. extern struct file *current_file;
  173. struct file *lookup_file(const char *name);
  174. extern struct symbol symbol_yes, symbol_no, symbol_mod;
  175. extern struct symbol *modules_sym;
  176. extern struct symbol *sym_defconfig_list;
  177. extern int cdebug;
  178. struct expr *expr_alloc_symbol(struct symbol *sym);
  179. struct expr *expr_alloc_one(enum expr_type type, struct expr *ce);
  180. struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2);
  181. struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2);
  182. struct expr *expr_alloc_and(struct expr *e1, struct expr *e2);
  183. struct expr *expr_alloc_or(struct expr *e1, struct expr *e2);
  184. struct expr *expr_copy(const struct expr *org);
  185. void expr_free(struct expr *e);
  186. int expr_eq(struct expr *e1, struct expr *e2);
  187. void expr_eliminate_eq(struct expr **ep1, struct expr **ep2);
  188. tristate expr_calc_value(struct expr *e);
  189. struct expr *expr_eliminate_yn(struct expr *e);
  190. struct expr *expr_trans_bool(struct expr *e);
  191. struct expr *expr_eliminate_dups(struct expr *e);
  192. struct expr *expr_transform(struct expr *e);
  193. int expr_contains_symbol(struct expr *dep, struct symbol *sym);
  194. bool expr_depends_symbol(struct expr *dep, struct symbol *sym);
  195. struct expr *expr_extract_eq_and(struct expr **ep1, struct expr **ep2);
  196. struct expr *expr_extract_eq_or(struct expr **ep1, struct expr **ep2);
  197. void expr_extract_eq(enum expr_type type, struct expr **ep, struct expr **ep1, struct expr **ep2);
  198. struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symbol *sym);
  199. struct expr *expr_simplify_unmet_dep(struct expr *e1, struct expr *e2);
  200. void expr_fprint(struct expr *e, FILE *out);
  201. struct gstr; /* forward */
  202. void expr_gstr_print(struct expr *e, struct gstr *gs);
  203. static inline int expr_is_yes(struct expr *e)
  204. {
  205. return !e || (e->type == E_SYMBOL && e->left.sym == &symbol_yes);
  206. }
  207. static inline int expr_is_no(struct expr *e)
  208. {
  209. return e && (e->type == E_SYMBOL && e->left.sym == &symbol_no);
  210. }
  211. #ifdef __cplusplus
  212. }
  213. #endif
  214. #endif /* EXPR_H */