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expr.h 6.8 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 <stdio.h>
  11. #ifndef __cplusplus
  12. #include <stdbool.h>
  13. #endif
  14. struct file {
  15. struct file *next;
  16. struct file *parent;
  17. char *name;
  18. int lineno;
  19. int flags;
  20. };
  21. #define FILE_BUSY 0x0001
  22. #define FILE_SCANNED 0x0002
  23. typedef enum tristate {
  24. no, mod, yes
  25. } tristate;
  26. enum expr_type {
  27. E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_LIST, E_SYMBOL, E_RANGE
  28. };
  29. union expr_data {
  30. struct expr *expr;
  31. struct symbol *sym;
  32. };
  33. struct expr {
  34. enum expr_type type;
  35. union expr_data left, right;
  36. };
  37. #define EXPR_OR(dep1, dep2) (((dep1)>(dep2))?(dep1):(dep2))
  38. #define EXPR_AND(dep1, dep2) (((dep1)<(dep2))?(dep1):(dep2))
  39. #define EXPR_NOT(dep) (2-(dep))
  40. #define expr_list_for_each_sym(l, e, s) \
  41. for (e = (l); e && (s = e->right.sym); e = e->left.expr)
  42. struct expr_value {
  43. struct expr *expr;
  44. tristate tri;
  45. };
  46. struct symbol_value {
  47. void *val;
  48. tristate tri;
  49. };
  50. enum symbol_type {
  51. S_UNKNOWN, S_BOOLEAN, S_TRISTATE, S_INT, S_HEX, S_STRING, S_OTHER
  52. };
  53. /* enum values are used as index to symbol.def[] */
  54. enum {
  55. S_DEF_USER, /* main user value */
  56. S_DEF_AUTO, /* values read from auto.conf */
  57. S_DEF_DEF3, /* Reserved for UI usage */
  58. S_DEF_DEF4, /* Reserved for UI usage */
  59. S_DEF_COUNT
  60. };
  61. struct symbol {
  62. struct symbol *next;
  63. char *name;
  64. enum symbol_type type;
  65. struct symbol_value curr;
  66. struct symbol_value def[S_DEF_COUNT];
  67. tristate visible;
  68. int flags;
  69. struct property *prop;
  70. struct expr_value rev_dep;
  71. };
  72. #define for_all_symbols(i, sym) for (i = 0; i < 257; i++) for (sym = symbol_hash[i]; sym; sym = sym->next) if (sym->type != S_OTHER)
  73. #define SYMBOL_CONST 0x0001 /* symbol is const */
  74. #define SYMBOL_CHECK 0x0008 /* used during dependency checking */
  75. #define SYMBOL_CHOICE 0x0010 /* start of a choice block (null name) */
  76. #define SYMBOL_CHOICEVAL 0x0020 /* used as a value in a choice block */
  77. #define SYMBOL_VALID 0x0080 /* set when symbol.curr is calculated */
  78. #define SYMBOL_OPTIONAL 0x0100 /* choice is optional - values can be 'n' */
  79. #define SYMBOL_WRITE 0x0200 /* ? */
  80. #define SYMBOL_CHANGED 0x0400 /* ? */
  81. #define SYMBOL_AUTO 0x1000 /* value from environment variable */
  82. #define SYMBOL_CHECKED 0x2000 /* used during dependency checking */
  83. #define SYMBOL_WARNED 0x8000 /* warning has been issued */
  84. /* Set when symbol.def[] is used */
  85. #define SYMBOL_DEF 0x10000 /* First bit of SYMBOL_DEF */
  86. #define SYMBOL_DEF_USER 0x10000 /* symbol.def[S_DEF_USER] is valid */
  87. #define SYMBOL_DEF_AUTO 0x20000 /* symbol.def[S_DEF_AUTO] is valid */
  88. #define SYMBOL_DEF3 0x40000 /* symbol.def[S_DEF_3] is valid */
  89. #define SYMBOL_DEF4 0x80000 /* symbol.def[S_DEF_4] is valid */
  90. #define SYMBOL_MAXLENGTH 256
  91. #define SYMBOL_HASHSIZE 257
  92. #define SYMBOL_HASHMASK 0xff
  93. /* A property represent the config options that can be associated
  94. * with a config "symbol".
  95. * Sample:
  96. * config FOO
  97. * default y
  98. * prompt "foo prompt"
  99. * select BAR
  100. * config BAZ
  101. * int "BAZ Value"
  102. * range 1..255
  103. */
  104. enum prop_type {
  105. P_UNKNOWN,
  106. P_PROMPT, /* prompt "foo prompt" or "BAZ Value" */
  107. P_COMMENT, /* text associated with a comment */
  108. P_MENU, /* prompt associated with a menuconfig option */
  109. P_DEFAULT, /* default y */
  110. P_CHOICE, /* choice value */
  111. P_SELECT, /* select BAR */
  112. P_RANGE, /* range 7..100 (for a symbol) */
  113. P_ENV, /* value from environment variable */
  114. };
  115. struct property {
  116. struct property *next; /* next property - null if last */
  117. struct symbol *sym; /* the symbol for which the property is associated */
  118. enum prop_type type; /* type of property */
  119. const char *text; /* the prompt value - P_PROMPT, P_MENU, P_COMMENT */
  120. struct expr_value visible;
  121. struct expr *expr; /* the optional conditional part of the property */
  122. struct menu *menu; /* the menu the property are associated with
  123. * valid for: P_SELECT, P_RANGE, P_CHOICE,
  124. * P_PROMPT, P_DEFAULT, P_MENU, P_COMMENT */
  125. struct file *file; /* what file was this property defined */
  126. int lineno; /* what lineno was this property defined */
  127. };
  128. #define for_all_properties(sym, st, tok) \
  129. for (st = sym->prop; st; st = st->next) \
  130. if (st->type == (tok))
  131. #define for_all_defaults(sym, st) for_all_properties(sym, st, P_DEFAULT)
  132. #define for_all_choices(sym, st) for_all_properties(sym, st, P_CHOICE)
  133. #define for_all_prompts(sym, st) \
  134. for (st = sym->prop; st; st = st->next) \
  135. if (st->text)
  136. struct menu {
  137. struct menu *next;
  138. struct menu *parent;
  139. struct menu *list;
  140. struct symbol *sym;
  141. struct property *prompt;
  142. struct expr *dep;
  143. unsigned int flags;
  144. char *help;
  145. struct file *file;
  146. int lineno;
  147. void *data;
  148. };
  149. #define MENU_CHANGED 0x0001
  150. #define MENU_ROOT 0x0002
  151. #ifndef SWIG
  152. extern struct file *file_list;
  153. extern struct file *current_file;
  154. struct file *lookup_file(const char *name);
  155. extern struct symbol symbol_yes, symbol_no, symbol_mod;
  156. extern struct symbol *modules_sym;
  157. extern struct symbol *sym_defconfig_list;
  158. extern int cdebug;
  159. struct expr *expr_alloc_symbol(struct symbol *sym);
  160. struct expr *expr_alloc_one(enum expr_type type, struct expr *ce);
  161. struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2);
  162. struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2);
  163. struct expr *expr_alloc_and(struct expr *e1, struct expr *e2);
  164. struct expr *expr_alloc_or(struct expr *e1, struct expr *e2);
  165. struct expr *expr_copy(struct expr *org);
  166. void expr_free(struct expr *e);
  167. int expr_eq(struct expr *e1, struct expr *e2);
  168. void expr_eliminate_eq(struct expr **ep1, struct expr **ep2);
  169. tristate expr_calc_value(struct expr *e);
  170. struct expr *expr_eliminate_yn(struct expr *e);
  171. struct expr *expr_trans_bool(struct expr *e);
  172. struct expr *expr_eliminate_dups(struct expr *e);
  173. struct expr *expr_transform(struct expr *e);
  174. int expr_contains_symbol(struct expr *dep, struct symbol *sym);
  175. bool expr_depends_symbol(struct expr *dep, struct symbol *sym);
  176. struct expr *expr_extract_eq_and(struct expr **ep1, struct expr **ep2);
  177. struct expr *expr_extract_eq_or(struct expr **ep1, struct expr **ep2);
  178. void expr_extract_eq(enum expr_type type, struct expr **ep, struct expr **ep1, struct expr **ep2);
  179. struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symbol *sym);
  180. void expr_fprint(struct expr *e, FILE *out);
  181. struct gstr; /* forward */
  182. void expr_gstr_print(struct expr *e, struct gstr *gs);
  183. static inline int expr_is_yes(struct expr *e)
  184. {
  185. return !e || (e->type == E_SYMBOL && e->left.sym == &symbol_yes);
  186. }
  187. static inline int expr_is_no(struct expr *e)
  188. {
  189. return e && (e->type == E_SYMBOL && e->left.sym == &symbol_no);
  190. }
  191. #endif
  192. #ifdef __cplusplus
  193. }
  194. #endif
  195. #endif /* EXPR_H */