Mercurial > repos > blastem
annotate tern.c @ 1369:3e7a921718de
Fix handling of test register selected sprite layer in border area. Gets rid of the border garbage in the "disco floor/ceiling" scene of OD2
author | Michael Pavone <pavone@retrodev.com> |
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date | Tue, 23 May 2017 19:09:57 -0700 |
parents | 071e761bcdcf |
children | e890971f3757 |
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1 /* |
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2 Copyright 2013 Michael Pavone |
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3 This file is part of BlastEm. |
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4 BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text. |
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5 */ |
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6 #include "tern.h" |
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7 #include <stddef.h> |
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8 #include <stdlib.h> |
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9 #include <string.h> |
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10 #include <stdio.h> |
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11 #include "util.h" |
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12 |
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13 tern_node * tern_insert(tern_node * head, char const * key, tern_val value, uint8_t valtype) |
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14 { |
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15 tern_node ** cur = &head; |
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16 while(*key) |
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17 { |
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18 if (*cur) { |
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19 while(*cur && (*cur)->el != *key) |
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20 { |
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21 if (*key < (*cur)->el) { |
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22 cur = &(*cur)->left; |
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23 } else { |
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24 cur = &(*cur)->right; |
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25 } |
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26 } |
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27 } |
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28 if (!*cur) { |
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29 *cur = malloc(sizeof(tern_node)); |
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30 (*cur)->left = NULL; |
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31 (*cur)->right = NULL; |
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32 (*cur)->straight.next = NULL; |
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33 (*cur)->el = *key; |
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34 (*cur)->valtype = TVAL_NONE; |
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35 } |
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36 cur = &((*cur)->straight.next); |
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37 key++; |
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38 } |
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39 while(*cur && (*cur)->el) |
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40 { |
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41 cur = &(*cur)->left; |
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42 } |
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43 if (!*cur) { |
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44 *cur = malloc(sizeof(tern_node)); |
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45 (*cur)->left = NULL; |
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46 (*cur)->right = NULL; |
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47 (*cur)->el = 0; |
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48 } |
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49 (*cur)->straight.value = value; |
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50 (*cur)->valtype = valtype; |
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51 return head; |
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52 } |
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53 |
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54 uint8_t tern_find(tern_node * head, char const * key, tern_val *ret) |
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55 { |
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56 tern_node * cur = head; |
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57 while (cur) |
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58 { |
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59 if (cur->el == *key) { |
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60 if (*key) { |
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61 cur = cur->straight.next; |
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62 key++; |
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63 } else { |
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64 *ret = cur->straight.value; |
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65 return cur->valtype; |
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66 } |
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67 } else if (*key < cur->el) { |
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68 cur = cur->left; |
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69 } else { |
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70 cur = cur->right; |
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71 } |
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72 } |
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73 return TVAL_NONE; |
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74 } |
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75 |
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76 tern_node * tern_find_prefix(tern_node * head, char const * key) |
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77 { |
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78 tern_node * cur = head; |
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79 while (cur && *key) |
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80 { |
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81 if (cur->el == *key) { |
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82 cur = cur->straight.next; |
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83 key++; |
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84 } else if (*key < cur->el) { |
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85 cur = cur->left; |
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86 } else { |
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87 cur = cur->right; |
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88 } |
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89 } |
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90 return cur; |
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91 } |
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92 |
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93 intptr_t tern_find_int(tern_node * head, char const * key, intptr_t def) |
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94 { |
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95 tern_val ret; |
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96 uint8_t valtype = tern_find(head, key, &ret); |
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97 if (valtype == TVAL_INT) { |
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98 return ret.intval; |
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99 } |
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100 return def; |
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101 } |
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102 |
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103 tern_node * tern_insert_int(tern_node * head, char const * key, intptr_t value) |
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104 { |
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105 tern_val val; |
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106 val.intval = value; |
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107 return tern_insert(head, key, val, TVAL_INT); |
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108 } |
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109 |
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110 void * tern_find_ptr_default(tern_node * head, char const * key, void * def) |
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111 { |
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112 tern_val ret; |
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113 uint8_t valtype = tern_find(head, key, &ret); |
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114 if (valtype == TVAL_PTR) { |
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115 return ret.ptrval; |
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116 } |
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117 return def; |
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118 } |
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119 |
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120 void * tern_find_ptr(tern_node * head, char const * key) |
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121 { |
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122 return tern_find_ptr_default(head, key, NULL); |
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123 } |
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124 |
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125 tern_node *tern_find_node(tern_node *head, char const *key) |
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126 { |
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127 tern_val ret; |
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128 uint8_t valtype = tern_find(head, key, &ret); |
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129 if (valtype == TVAL_NODE) { |
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130 return ret.ptrval; |
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131 } |
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132 return NULL; |
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133 } |
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134 |
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135 tern_val tern_find_path_default(tern_node *head, char const *key, tern_val def, uint8_t req_valtype) |
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136 { |
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137 tern_val ret; |
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138 while (*key) |
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139 { |
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140 uint8_t valtype = tern_find(head, key, &ret); |
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141 if (!valtype) { |
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142 return def; |
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143 } |
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144 key = key + strlen(key) + 1; |
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145 if (*key) { |
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146 if (valtype != TVAL_NODE) { |
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147 return def; |
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148 } |
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149 head = ret.ptrval; |
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150 } else if (req_valtype && req_valtype != valtype) { |
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151 return def; |
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152 } |
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153 } |
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154 return ret; |
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155 } |
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156 |
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157 tern_val tern_find_path(tern_node *head, char const *key, uint8_t valtype) |
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158 { |
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159 tern_val def; |
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160 def.ptrval = NULL; |
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161 return tern_find_path_default(head, key, def, valtype); |
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162 } |
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163 |
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164 tern_node * tern_insert_ptr(tern_node * head, char const * key, void * value) |
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165 { |
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166 tern_val val; |
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167 val.ptrval = value; |
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168 return tern_insert(head, key, val, TVAL_PTR); |
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169 } |
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170 |
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171 tern_node * tern_insert_node(tern_node *head, char const *key, tern_node *value) |
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172 { |
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173 tern_val val; |
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174 val.ptrval = value; |
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175 return tern_insert(head, key, val, TVAL_NODE); |
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176 } |
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177 |
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178 uint32_t tern_count(tern_node *head) |
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179 { |
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180 uint32_t count = 0; |
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181 if (head->left) { |
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182 count += tern_count(head->left); |
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183 } |
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184 if (head->right) { |
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185 count += tern_count(head->right); |
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186 } |
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187 if (!head->el) { |
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188 count++; |
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189 } else if (head->straight.next) { |
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190 count += tern_count(head->straight.next); |
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191 } |
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192 return count; |
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193 } |
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194 |
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195 #define MAX_ITER_KEY 127 |
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196 void tern_foreach_int(tern_node *head, iter_fun fun, void *data, char *keybuf, int pos) |
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197 { |
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198 if (!head->el) { |
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199 keybuf[pos] = 0; |
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200 fun(keybuf, head->straight.value, head->valtype, data); |
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201 } |
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202 if (head->left) { |
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203 tern_foreach_int(head->left, fun, data, keybuf, pos); |
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204 } |
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205 if (head->el) { |
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206 if (pos == MAX_ITER_KEY) { |
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207 fatal_error("tern_foreach_int: exceeded maximum key size"); |
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208 } |
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209 keybuf[pos] = head->el; |
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210 tern_foreach_int(head->straight.next, fun, data, keybuf, pos+1); |
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211 } |
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212 if (head->right) { |
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213 tern_foreach_int(head->right, fun, data, keybuf, pos); |
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214 } |
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215 } |
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216 |
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217 void tern_foreach(tern_node *head, iter_fun fun, void *data) |
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218 { |
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219 //lame, but good enough for my purposes |
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220 char key[MAX_ITER_KEY+1]; |
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221 tern_foreach_int(head, fun, data, key, 0); |
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222 } |
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223 |
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224 char * tern_int_key(uint32_t key, char * buf) |
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225 { |
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226 char * cur = buf; |
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227 while (key) |
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228 { |
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229 *(cur++) = (key & 0x7F) + 1; |
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230 key >>= 7; |
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231 } |
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232 *cur = 0; |
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233 return buf; |
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234 } |
766
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WIP changes to support reading cart memory map from ROM DB
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235 |
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236 void tern_free(tern_node *head) |
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237 { |
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238 if (head->left) { |
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239 tern_free(head->left); |
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240 } |
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241 if (head->right) { |
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242 tern_free(head->right); |
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243 } |
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244 if (head->el) { |
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245 tern_free(head->straight.next); |
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246 } |
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071e761bcdcf
Fix a deficiency in the way types were handled in my ternary tree. Fixes in which some paths that were constructed from a template with variables would sometimes get an extra garbage character thrown in
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247 free(head); |
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248 } |