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expr.h 7.1 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,
  27. E_EQUAL, E_UNEQUAL, E_LTH, E_LEQ, E_GTH, E_GEQ,
  28. E_LIST, E_SYMBOL, E_RANGE
  29. };
  30. union expr_data {
  31. struct expr *expr;
  32. struct symbol *sym;
  33. };
  34. struct expr {
  35. enum expr_type type;
  36. union expr_data left, right;
  37. };
  38. #define EXPR_OR(dep1, dep2) (((dep1)>(dep2))?(dep1):(dep2))
  39. #define EXPR_AND(dep1, dep2) (((dep1)<(dep2))?(dep1):(dep2))
  40. #define EXPR_NOT(dep) (2-(dep))
  41. #define expr_list_for_each_sym(l, e, s) \
  42. for (e = (l); e && (s = e->right.sym); e = e->left.expr)
  43. struct expr_value {
  44. struct expr *expr;
  45. tristate tri;
  46. };
  47. struct symbol_value {
  48. void *val;
  49. tristate tri;
  50. };
  51. enum symbol_type {
  52. S_UNKNOWN, S_BOOLEAN, S_TRISTATE, S_INT, S_HEX, S_STRING, S_OTHER
  53. };
  54. /* enum values are used as index to symbol.def[] */
  55. enum {
  56. S_DEF_USER, /* main user value */
  57. S_DEF_AUTO, /* values read from auto.conf */
  58. S_DEF_DEF3, /* Reserved for UI usage */
  59. S_DEF_DEF4, /* Reserved for UI usage */
  60. S_DEF_COUNT
  61. };
  62. struct symbol {
  63. struct symbol *next;
  64. char *name;
  65. enum symbol_type type;
  66. struct symbol_value curr;
  67. struct symbol_value def[S_DEF_COUNT];
  68. tristate visible;
  69. int flags;
  70. struct property *prop;
  71. struct expr_value dir_dep;
  72. struct expr_value rev_dep;
  73. };
  74. #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)
  75. #define SYMBOL_CONST 0x0001 /* symbol is const */
  76. #define SYMBOL_CHECK 0x0008 /* used during dependency checking */
  77. #define SYMBOL_CHOICE 0x0010 /* start of a choice block (null name) */
  78. #define SYMBOL_CHOICEVAL 0x0020 /* used as a value in a choice block */
  79. #define SYMBOL_VALID 0x0080 /* set when symbol.curr is calculated */
  80. #define SYMBOL_OPTIONAL 0x0100 /* choice is optional - values can be 'n' */
  81. #define SYMBOL_WRITE 0x0200 /* write symbol to file (KCONFIG_CONFIG) */
  82. #define SYMBOL_CHANGED 0x0400 /* ? */
  83. #define SYMBOL_AUTO 0x1000 /* value from environment variable */
  84. #define SYMBOL_CHECKED 0x2000 /* used during dependency checking */
  85. #define SYMBOL_WARNED 0x8000 /* warning has been issued */
  86. /* Set when symbol.def[] is used */
  87. #define SYMBOL_DEF 0x10000 /* First bit of SYMBOL_DEF */
  88. #define SYMBOL_DEF_USER 0x10000 /* symbol.def[S_DEF_USER] is valid */
  89. #define SYMBOL_DEF_AUTO 0x20000 /* symbol.def[S_DEF_AUTO] is valid */
  90. #define SYMBOL_DEF3 0x40000 /* symbol.def[S_DEF_3] is valid */
  91. #define SYMBOL_DEF4 0x80000 /* symbol.def[S_DEF_4] is valid */
  92. /* choice values need to be set before calculating this symbol value */
  93. #define SYMBOL_NEED_SET_CHOICE_VALUES 0x100000
  94. /* Set symbol to y if allnoconfig; used for symbols that hide others */
  95. #define SYMBOL_ALLNOCONFIG_Y 0x200000
  96. #define SYMBOL_MAXLENGTH 256
  97. #define SYMBOL_HASHSIZE 9973
  98. /* A property represent the config options that can be associated
  99. * with a config "symbol".
  100. * Sample:
  101. * config FOO
  102. * default y
  103. * prompt "foo prompt"
  104. * select BAR
  105. * config BAZ
  106. * int "BAZ Value"
  107. * range 1..255
  108. */
  109. enum prop_type {
  110. P_UNKNOWN,
  111. P_PROMPT, /* prompt "foo prompt" or "BAZ Value" */
  112. P_COMMENT, /* text associated with a comment */
  113. P_MENU, /* prompt associated with a menuconfig option */
  114. P_DEFAULT, /* default y */
  115. P_CHOICE, /* choice value */
  116. P_SELECT, /* select BAR */
  117. P_RANGE, /* range 7..100 (for a symbol) */
  118. P_ENV, /* value from environment variable */
  119. P_SYMBOL, /* where a symbol is defined */
  120. P_RESET, /* reset to defaults condition */
  121. };
  122. struct property {
  123. struct property *next; /* next property - null if last */
  124. struct symbol *sym; /* the symbol for which the property is associated */
  125. enum prop_type type; /* type of property */
  126. const char *text; /* the prompt value - P_PROMPT, P_MENU, P_COMMENT */
  127. struct expr_value visible;
  128. struct expr *expr; /* the optional conditional part of the property */
  129. struct menu *menu; /* the menu the property are associated with
  130. * valid for: P_SELECT, P_RANGE, P_CHOICE,
  131. * P_PROMPT, P_DEFAULT, P_MENU, P_COMMENT */
  132. struct file *file; /* what file was this property defined */
  133. int lineno; /* what lineno was this property defined */
  134. };
  135. #define for_all_properties(sym, st, tok) \
  136. for (st = sym->prop; st; st = st->next) \
  137. if (st->type == (tok))
  138. #define for_all_defaults(sym, st) for_all_properties(sym, st, P_DEFAULT)
  139. #define for_all_choices(sym, st) for_all_properties(sym, st, P_CHOICE)
  140. #define for_all_prompts(sym, st) \
  141. for (st = sym->prop; st; st = st->next) \
  142. if (st->text)
  143. struct menu {
  144. struct menu *next;
  145. struct menu *parent;
  146. struct menu *list;
  147. struct symbol *sym;
  148. struct property *prompt;
  149. struct expr *visibility;
  150. struct expr *dep;
  151. unsigned int flags;
  152. char *help;
  153. struct file *file;
  154. int lineno;
  155. void *data;
  156. };
  157. #define MENU_CHANGED 0x0001
  158. #define MENU_ROOT 0x0002
  159. struct jump_key {
  160. struct list_head entries;
  161. size_t offset;
  162. struct menu *target;
  163. int index;
  164. };
  165. #define JUMP_NB 9
  166. extern struct file *file_list;
  167. extern struct file *current_file;
  168. struct file *lookup_file(const char *name);
  169. extern struct symbol symbol_yes, symbol_no, symbol_mod;
  170. extern struct symbol *modules_sym;
  171. extern struct symbol *sym_defconfig_list;
  172. extern int cdebug;
  173. struct expr *expr_alloc_symbol(struct symbol *sym);
  174. struct expr *expr_alloc_one(enum expr_type type, struct expr *ce);
  175. struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2);
  176. struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2);
  177. struct expr *expr_alloc_and(struct expr *e1, struct expr *e2);
  178. struct expr *expr_alloc_or(struct expr *e1, struct expr *e2);
  179. struct expr *expr_copy(const struct expr *org);
  180. void expr_free(struct expr *e);
  181. void expr_eliminate_eq(struct expr **ep1, struct expr **ep2);
  182. tristate expr_calc_value(struct expr *e);
  183. struct expr *expr_trans_bool(struct expr *e);
  184. struct expr *expr_eliminate_dups(struct expr *e);
  185. struct expr *expr_transform(struct expr *e);
  186. int expr_contains_symbol(struct expr *dep, struct symbol *sym);
  187. bool expr_depends_symbol(struct expr *dep, struct symbol *sym);
  188. struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symbol *sym);
  189. struct expr *expr_simplify_unmet_dep(struct expr *e1, struct expr *e2);
  190. void expr_fprint(struct expr *e, FILE *out);
  191. struct gstr; /* forward */
  192. void expr_gstr_print(struct expr *e, struct gstr *gs);
  193. static inline int expr_is_yes(struct expr *e)
  194. {
  195. return !e || (e->type == E_SYMBOL && e->left.sym == &symbol_yes);
  196. }
  197. static inline int expr_is_no(struct expr *e)
  198. {
  199. return e && (e->type == E_SYMBOL && e->left.sym == &symbol_no);
  200. }
  201. #ifdef __cplusplus
  202. }
  203. #endif
  204. #endif /* EXPR_H */