annotate array.h @ 46:eaa154ded584

Test recursive macros.
author David A. Holland
date Sat, 30 Mar 2013 22:35:06 -0400
parents 337110e7240a
children 2e25e55dba6b
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1 /*-
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2 * Copyright (c) 2009 The NetBSD Foundation, Inc.
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3 * All rights reserved.
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4 *
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5 * This code is derived from software contributed to The NetBSD Foundation
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6 * by David A. Holland.
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7 *
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8 * Redistribution and use in source and binary forms, with or without
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9 * modification, are permitted provided that the following conditions
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10 * are met:
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11 * 1. Redistributions of source code must retain the above copyright
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12 * notice, this list of conditions and the following disclaimer.
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13 * 2. Redistributions in binary form must reproduce the above copyright
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14 * notice, this list of conditions and the following disclaimer in the
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15 * documentation and/or other materials provided with the distribution.
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16 *
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17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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27 * POSSIBILITY OF SUCH DAMAGE.
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28 */
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29
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30 #ifndef ARRAY_H
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31 #define ARRAY_H
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32
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33 #include "inlinedefs.h" // XXX
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34 #include "utils.h"
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35
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36 #define ARRAYS_CHECKED
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37
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38 #ifdef ARRAYS_CHECKED
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39 #include <assert.h>
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40 #define arrayassert assert
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41 #else
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42 #define arrayassert(x) ((void)(x))
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43 #endif
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44
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45 ////////////////////////////////////////////////////////////
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46 // type and base operations
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47
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48 struct array {
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49 void **v;
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50 unsigned num, max;
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51 };
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52
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53 struct array *array_create(void);
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54 void array_destroy(struct array *);
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55 void array_init(struct array *);
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56 void array_cleanup(struct array *);
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57 unsigned array_num(const struct array *);
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58 void *array_get(const struct array *, unsigned index_);
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59 void array_set(const struct array *, unsigned index_, void *val);
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60 void array_setsize(struct array *, unsigned num);
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61 void array_add(struct array *, void *val, unsigned *index_ret);
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62 void array_insert(struct array *a, unsigned index_);
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63 void array_remove(struct array *a, unsigned index_);
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64
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65 ////////////////////////////////////////////////////////////
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66 // inlining for base operations
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67
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68 #ifndef ARRAYINLINE
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69 #define ARRAYINLINE __c99inline
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70 #endif
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71
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72 ARRAYINLINE unsigned
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73 array_num(const struct array *a)
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74 {
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75 return a->num;
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76 }
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77
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78 ARRAYINLINE void *
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79 array_get(const struct array *a, unsigned index_)
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80 {
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81 arrayassert(index_ < a->num);
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82 return a->v[index_];
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83 }
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84
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85 ARRAYINLINE void
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86 array_set(const struct array *a, unsigned index_, void *val)
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87 {
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88 arrayassert(index_ < a->num);
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89 a->v[index_] = val;
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90 }
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91
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92 ARRAYINLINE void
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93 array_add(struct array *a, void *val, unsigned *index_ret)
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94 {
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95 unsigned index_ = a->num;
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96 array_setsize(a, index_+1);
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97 a->v[index_] = val;
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98 if (index_ret != NULL) {
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99 *index_ret = index_;
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100 }
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101 }
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102
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103 ////////////////////////////////////////////////////////////
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104 // bits for declaring and defining typed arrays
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105
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106 /*
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107 * Usage:
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108 *
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109 * DECLARRAY_BYTYPE(foo, bar) declares "struct foo", which is
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110 * an array of pointers to "bar", plus the operations on it.
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111 *
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112 * DECLARRAY(foo) is equivalent to DECLARRAY_BYTYPE(fooarray, struct foo).
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113 *
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114 * DEFARRAY_BYTYPE and DEFARRAY are the same as DECLARRAY except that
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115 * they define the operations, and both take an extra argument INLINE.
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116 * For C99 this should be INLINE in header files and empty in the
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117 * master source file, the same as the usage of ARRAYINLINE above and
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118 * in array.c.
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119 *
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120 * Example usage in e.g. item.h of some game:
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121 *
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122 * DECLARRAY_BYTYPE(stringarray, char);
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123 * DECLARRAY(potion);
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124 * DECLARRAY(sword);
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125 *
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126 * #ifndef ITEMINLINE
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127 * #define ITEMINLINE INLINE
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128 * #endif
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129 *
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130 * DEFARRAY_BYTYPE(stringarray, char, ITEMINLINE);
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131 * DEFARRAY(potion, ITEMINLINE);
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132 * DEFARRAY(sword, ITEMINLINE);
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133 *
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134 * Then item.c would do "#define ITEMINLINE" before including item.h.
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135 */
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136
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137 #define DECLARRAY_BYTYPE(ARRAY, T) \
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138 struct ARRAY { \
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139 struct array arr; \
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140 }; \
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141 \
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142 struct ARRAY *ARRAY##_create(void); \
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143 void ARRAY##_destroy(struct ARRAY *a); \
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144 void ARRAY##_init(struct ARRAY *a); \
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145 void ARRAY##_cleanup(struct ARRAY *a); \
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146 unsigned ARRAY##_num(const struct ARRAY *a); \
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147 T *ARRAY##_get(const struct ARRAY *a, unsigned index_); \
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148 void ARRAY##_set(struct ARRAY *a, unsigned index_, T *val); \
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149 void ARRAY##_setsize(struct ARRAY *a, unsigned num); \
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150 void ARRAY##_add(struct ARRAY *a, T *val, unsigned *index_ret); \
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151 void ARRAY##_insert(struct ARRAY *a, unsigned index_); \
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152 void ARRAY##_remove(struct ARRAY *a, unsigned index_)
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153
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154
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155 #define DEFARRAY_BYTYPE(ARRAY, T, INLINE) \
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156 INLINE void \
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157 ARRAY##_init(struct ARRAY *a) \
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158 { \
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159 array_init(&a->arr); \
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160 } \
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161 \
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162 INLINE void \
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163 ARRAY##_cleanup(struct ARRAY *a) \
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164 { \
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165 array_cleanup(&a->arr); \
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166 } \
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167 \
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168 INLINE struct \
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169 ARRAY *ARRAY##_create(void) \
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170 { \
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171 struct ARRAY *a; \
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172 \
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173 a = domalloc(sizeof(*a)); \
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174 ARRAY##_init(a); \
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175 return a; \
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176 } \
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177 \
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178 INLINE void \
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179 ARRAY##_destroy(struct ARRAY *a) \
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180 { \
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181 ARRAY##_cleanup(a); \
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182 dofree(a, sizeof(*a)); \
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183 } \
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184 \
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185 INLINE unsigned \
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186 ARRAY##_num(const struct ARRAY *a) \
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187 { \
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188 return array_num(&a->arr); \
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189 } \
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190 \
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191 INLINE T * \
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192 ARRAY##_get(const struct ARRAY *a, unsigned index_) \
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193 { \
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194 return (T *)array_get(&a->arr, index_); \
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195 } \
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196 \
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197 INLINE void \
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198 ARRAY##_set(struct ARRAY *a, unsigned index_, T *val) \
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199 { \
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200 array_set(&a->arr, index_, (void *)val); \
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201 } \
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202 \
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203 INLINE void \
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204 ARRAY##_setsize(struct ARRAY *a, unsigned num) \
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205 { \
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206 array_setsize(&a->arr, num); \
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207 } \
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208 \
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209 INLINE void \
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210 ARRAY##_add(struct ARRAY *a, T *val, unsigned *ret) \
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211 { \
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212 array_add(&a->arr, (void *)val, ret); \
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213 } \
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214 \
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215 INLINE void \
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216 ARRAY##_insert(struct ARRAY *a, unsigned index_) \
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217 { \
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218 array_insert(&a->arr, index_); \
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219 } \
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220 \
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221 INLINE void \
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222 ARRAY##_remove(struct ARRAY *a, unsigned index_) \
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223 { \
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224 array_remove(&a->arr, index_); \
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225 }
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226
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227 #define DECLARRAY(T) DECLARRAY_BYTYPE(T##array, struct T)
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228 #define DEFARRAY(T, INLINE) DEFARRAY_BYTYPE(T##array, struct T, INLINE)
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229
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230 #define DESTROYALL_ARRAY(T, INLINE) \
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231 void T##array_destroyall(struct T##array *arr); \
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232 \
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233 INLINE void \
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234 T##array_destroyall(struct T##array *arr) \
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235 { \
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236 unsigned i, num; \
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237 struct T *t; \
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238 \
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239 num = T##array_num(arr); \
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240 for (i=0; i<num; i++) { \
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241 t = T##array_get(arr, i); \
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242 T##_destroy(t); \
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243 } \
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244 T##array_setsize(arr, 0); \
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245 }
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246
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247
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248 ////////////////////////////////////////////////////////////
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249 // basic array types
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250
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251 DECLARRAY_BYTYPE(stringarray, char);
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252 DEFARRAY_BYTYPE(stringarray, char, ARRAYINLINE);
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253
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254 #endif /* ARRAY_H */