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annotate kconfig/expr.h @ 1339:a3844a8132bc draft

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Isaac Dunham also reported that some diff implementations can't handle nonseekable input, so write to a temporary file instead of <(command). Use trap EXIT to make sure the temporary files get deleted.
author Rob Landley <rob@landley.net>
date Sun, 08 Jun 2014 14:01:37 -0500
parents 4d21d59f3206
children
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10
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1 /*
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2 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
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3 * Released under the terms of the GNU GPL v2.0.
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4 */
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5
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6 #ifndef EXPR_H
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7 #define EXPR_H
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8
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9 #ifdef __cplusplus
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10 extern "C" {
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11 #endif
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12
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13 #include <stdio.h>
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14 #ifndef __cplusplus
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15 #include <stdbool.h>
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16 #endif
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17
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18 struct file {
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19 struct file *next;
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20 struct file *parent;
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21 char *name;
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22 int lineno;
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23 int flags;
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24 };
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25
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26 #define FILE_BUSY 0x0001
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27 #define FILE_SCANNED 0x0002
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28 #define FILE_PRINTED 0x0004
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29
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30 typedef enum tristate {
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31 no, mod, yes
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32 } tristate;
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33
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34 enum expr_type {
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35 E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_CHOICE, E_SYMBOL, E_RANGE
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36 };
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37
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38 union expr_data {
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39 struct expr *expr;
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40 struct symbol *sym;
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41 };
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42
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43 struct expr {
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44 enum expr_type type;
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45 union expr_data left, right;
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46 };
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47
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48 #define E_OR(dep1, dep2) (((dep1)>(dep2))?(dep1):(dep2))
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49 #define E_AND(dep1, dep2) (((dep1)<(dep2))?(dep1):(dep2))
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50 #define E_NOT(dep) (2-(dep))
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51
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52 struct expr_value {
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53 struct expr *expr;
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54 tristate tri;
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55 };
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56
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57 struct symbol_value {
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58 void *val;
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59 tristate tri;
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60 };
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61
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62 enum symbol_type {
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63 S_UNKNOWN, S_BOOLEAN, S_TRISTATE, S_INT, S_HEX, S_STRING, S_OTHER
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64 };
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65
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66 enum {
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67 S_DEF_USER, /* main user value */
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68 S_DEF_AUTO,
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69 };
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70
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71 struct symbol {
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72 struct symbol *next;
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73 char *name;
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74 char *help;
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75 enum symbol_type type;
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76 struct symbol_value curr;
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77 struct symbol_value def[4];
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78 tristate visible;
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79 int flags;
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80 struct property *prop;
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81 struct expr *dep, *dep2;
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82 struct expr_value rev_dep;
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83 };
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84
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85 #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)
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86
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87 #define SYMBOL_CONST 0x0001
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88 #define SYMBOL_CHECK 0x0008
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89 #define SYMBOL_CHOICE 0x0010
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90 #define SYMBOL_CHOICEVAL 0x0020
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91 #define SYMBOL_PRINTED 0x0040
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92 #define SYMBOL_VALID 0x0080
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93 #define SYMBOL_OPTIONAL 0x0100
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94 #define SYMBOL_WRITE 0x0200
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95 #define SYMBOL_CHANGED 0x0400
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96 #define SYMBOL_AUTO 0x1000
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97 #define SYMBOL_CHECKED 0x2000
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98 #define SYMBOL_WARNED 0x8000
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99 #define SYMBOL_DEF 0x10000
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100 #define SYMBOL_DEF_USER 0x10000
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101 #define SYMBOL_DEF_AUTO 0x20000
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102 #define SYMBOL_DEF3 0x40000
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103 #define SYMBOL_DEF4 0x80000
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104
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105 #define SYMBOL_MAXLENGTH 256
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106 #define SYMBOL_HASHSIZE 257
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107 #define SYMBOL_HASHMASK 0xff
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108
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109 enum prop_type {
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110 P_UNKNOWN, P_PROMPT, P_COMMENT, P_MENU, P_DEFAULT, P_CHOICE, P_SELECT, P_RANGE
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111 };
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112
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113 struct property {
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114 struct property *next;
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115 struct symbol *sym;
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116 enum prop_type type;
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117 const char *text;
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118 struct expr_value visible;
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119 struct expr *expr;
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120 struct menu *menu;
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121 struct file *file;
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122 int lineno;
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123 };
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124
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125 #define for_all_properties(sym, st, tok) \
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126 for (st = sym->prop; st; st = st->next) \
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127 if (st->type == (tok))
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128 #define for_all_defaults(sym, st) for_all_properties(sym, st, P_DEFAULT)
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129 #define for_all_choices(sym, st) for_all_properties(sym, st, P_CHOICE)
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130 #define for_all_prompts(sym, st) \
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131 for (st = sym->prop; st; st = st->next) \
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132 if (st->text)
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133
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134 struct menu {
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135 struct menu *next;
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136 struct menu *parent;
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137 struct menu *list;
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138 struct symbol *sym;
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139 struct property *prompt;
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140 struct expr *dep;
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141 unsigned int flags;
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142 //char *help;
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143 struct file *file;
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144 int lineno;
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145 void *data;
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146 };
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147
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148 #define MENU_CHANGED 0x0001
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149 #define MENU_ROOT 0x0002
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150
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151 #ifndef SWIG
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152
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153 extern struct file *file_list;
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154 extern struct file *current_file;
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155 struct file *lookup_file(const char *name);
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156
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157 extern struct symbol symbol_yes, symbol_no, symbol_mod;
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158 extern struct symbol *modules_sym;
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159 extern struct symbol *sym_defconfig_list;
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160 extern int cdebug;
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161 struct expr *expr_alloc_symbol(struct symbol *sym);
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162 struct expr *expr_alloc_one(enum expr_type type, struct expr *ce);
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163 struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2);
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164 struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2);
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165 struct expr *expr_alloc_and(struct expr *e1, struct expr *e2);
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166 struct expr *expr_alloc_or(struct expr *e1, struct expr *e2);
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167 struct expr *expr_copy(struct expr *org);
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168 void expr_free(struct expr *e);
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169 int expr_eq(struct expr *e1, struct expr *e2);
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170 void expr_eliminate_eq(struct expr **ep1, struct expr **ep2);
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171 tristate expr_calc_value(struct expr *e);
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172 struct expr *expr_eliminate_yn(struct expr *e);
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173 struct expr *expr_trans_bool(struct expr *e);
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174 struct expr *expr_eliminate_dups(struct expr *e);
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175 struct expr *expr_transform(struct expr *e);
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176 int expr_contains_symbol(struct expr *dep, struct symbol *sym);
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177 bool expr_depends_symbol(struct expr *dep, struct symbol *sym);
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178 struct expr *expr_extract_eq_and(struct expr **ep1, struct expr **ep2);
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179 struct expr *expr_extract_eq_or(struct expr **ep1, struct expr **ep2);
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180 void expr_extract_eq(enum expr_type type, struct expr **ep, struct expr **ep1, struct expr **ep2);
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181 struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symbol *sym);
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182
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183 void expr_fprint(struct expr *e, FILE *out);
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184 struct gstr; /* forward */
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185 void expr_gstr_print(struct expr *e, struct gstr *gs);
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186
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187 static inline int expr_is_yes(struct expr *e)
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188 {
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189 return !e || (e->type == E_SYMBOL && e->left.sym == &symbol_yes);
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190 }
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191
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192 static inline int expr_is_no(struct expr *e)
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193 {
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194 return e && (e->type == E_SYMBOL && e->left.sym == &symbol_no);
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195 }
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196 #endif
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197
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198 #ifdef __cplusplus
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199 }
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200 #endif
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201
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202 #endif /* EXPR_H */