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1 | /* |
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2 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. |
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3 | * |
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4 | * Copyright 2019 Mike Becker, Olaf Wintermann All rights reserved. |
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5 | * |
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6 | * Redistribution and use in source and binary forms, with or without |
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7 | * modification, are permitted provided that the following conditions are met: |
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8 | * |
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9 | * 1. Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * |
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12 | * 2. Redistributions in binary form must reproduce the above copyright |
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13 | * notice, this list of conditions and the following disclaimer in the |
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14 | * documentation and/or other materials provided with the distribution. |
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15 | * |
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16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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17 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
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20 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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23 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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24 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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26 | * POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |
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29 | #define _GNU_SOURCE /* we want to use qsort_r(), if available */ |
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30 | #define __STDC_WANT_LIB_EXT1__ 1 /* use qsort_s, if available */ |
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31 | |
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32 | |
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33 | #include "ucx/array.h" |
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34 | #include "ucx/utils.h" |
4 | 35 | |
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36 | #include <string.h> |
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37 | #include <stdlib.h> |
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38 | #include <errno.h> |
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39 | |
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40 | #ifndef UCX_ARRAY_DISABLE_QSORT |
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41 | #ifdef __GLIBC__ |
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42 | #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 8) |
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43 | #define ucx_array_sort_impl qsort_r |
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44 | #endif /* glibc version >= 2.8 */ |
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45 | #elif /* not __GLIBC__ */ defined(__APPLE__) || defined(__FreeBSD__) |
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46 | #define ucx_array_sort_impl ucx_qsort_r |
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47 | #define USE_UCX_QSORT_R |
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48 | #elif /* not (__APPLE || __FreeBSD__) */ defined(__sun) |
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49 | #if __STDC_VERSION__ >= 201112L |
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50 | #define ucx_array_sort_impl qsort_s |
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51 | #endif |
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52 | #endif /* __GLIBC__, __APLE__, __FreeBSD__, __sun */ |
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53 | #endif /* UCX_ARRAY_DISABLE_QSORT */ |
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54 | |
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55 | #ifndef ucx_array_sort_impl |
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56 | #define ucx_array_sort_impl ucx_mergesort |
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57 | #endif |
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58 | |
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59 | static int ucx_array_ensurecap(UcxArray *array, size_t reqcap) { |
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60 | size_t required_capacity = array->capacity; |
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61 | while (reqcap > required_capacity) { |
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62 | if (required_capacity * 2 < required_capacity) |
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63 | return 1; |
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64 | required_capacity <<= 1; |
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65 | } |
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66 | if (ucx_array_reserve(array, required_capacity)) { |
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67 | return 1; |
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68 | } |
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69 | return 0; |
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70 | } |
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71 | |
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72 | int ucx_array_util_set_a(UcxAllocator* alloc, void** array, size_t* capacity, |
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73 | size_t elmsize, size_t index, ...) { |
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74 | |
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75 | if(!alloc || !capacity || !array) { |
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76 | errno = EINVAL; |
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77 | return 1; |
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78 | } |
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79 | |
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80 | size_t newcapacity = *capacity; |
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81 | while(index >= newcapacity) { |
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82 | if(ucx_szmul(newcapacity, 2, &newcapacity)) { |
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83 | errno = EOVERFLOW; |
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84 | return 1; |
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85 | } |
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86 | } |
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87 | |
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88 | size_t memlen, offset; |
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89 | if(ucx_szmul(newcapacity, elmsize, &memlen)) { |
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90 | errno = EOVERFLOW; |
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91 | return 1; |
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92 | } |
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93 | /* we don't need to check index*elmsize - it is smaller than memlen */ |
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94 | |
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95 | |
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96 | void* newptr = alrealloc(alloc, *array, memlen); |
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97 | if(newptr == NULL) { |
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98 | errno = ENOMEM; /* we cannot assume that every allocator sets this */ |
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99 | return 1; |
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100 | } |
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101 | *array = newptr; |
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102 | *capacity = newcapacity; |
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103 | |
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104 | |
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105 | char* dest = *array; |
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106 | dest += elmsize*index; |
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107 | |
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108 | va_list ap; |
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109 | va_start(ap, index); |
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110 | int elem = va_arg(ap, int); |
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111 | memcpy(dest, &elem, elmsize); |
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112 | va_end(ap); |
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113 | |
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114 | return 0; |
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115 | } |
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116 | |
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117 | UcxArray* ucx_array_new(size_t capacity, size_t elemsize) { |
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118 | return ucx_array_new_a(capacity, elemsize, ucx_default_allocator()); |
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119 | } |
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120 | |
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121 | UcxArray* ucx_array_new_a(size_t capacity, size_t elemsize, |
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122 | UcxAllocator* allocator) { |
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123 | UcxArray* array = almalloc(allocator, sizeof(UcxArray)); |
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124 | if(array) { |
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125 | ucx_array_init_a(array, capacity, elemsize, allocator); |
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126 | } |
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127 | return array; |
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128 | } |
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129 | |
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130 | void ucx_array_init(UcxArray* array, size_t capacity, size_t elemsize) { |
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131 | ucx_array_init_a(array, capacity, elemsize, ucx_default_allocator()); |
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132 | } |
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133 | |
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134 | void ucx_array_init_a(UcxArray* array, size_t capacity, size_t elemsize, |
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135 | UcxAllocator* allocator) { |
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136 | |
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137 | array->allocator = allocator; |
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138 | array->elemsize = elemsize; |
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139 | array->size = 0; |
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140 | array->data = alcalloc(allocator, capacity, elemsize); |
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141 | |
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142 | if (array->data) { |
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143 | array->capacity = capacity; |
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144 | } else { |
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145 | array->capacity = 0; |
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146 | } |
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147 | } |
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148 | |
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149 | int ucx_array_clone(UcxArray* dest, UcxArray const* src) { |
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150 | if (ucx_array_ensurecap(dest, src->capacity)) { |
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151 | return 1; |
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152 | } |
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153 | |
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154 | dest->elemsize = src->elemsize; |
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155 | dest->size = src->size; |
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156 | |
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157 | if (dest->data) { |
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158 | memcpy(dest->data, src->data, src->size*src->elemsize); |
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159 | } |
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160 | |
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161 | return 0; |
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162 | } |
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163 | |
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164 | int ucx_array_equals(UcxArray const *array1, UcxArray const *array2, |
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165 | cmp_func cmpfnc, void* data) { |
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166 | |
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167 | if (array1->size != array2->size || array1->elemsize != array2->elemsize) { |
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168 | return 0; |
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169 | } else { |
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170 | if (array1->size == 0) |
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171 | return 1; |
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172 | |
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173 | size_t elemsize; |
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174 | if (cmpfnc == NULL) { |
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175 | cmpfnc = ucx_cmp_mem; |
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176 | elemsize = array1->elemsize; |
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177 | data = &elemsize; |
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178 | } |
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179 | |
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180 | for (size_t i = 0 ; i < array1->size ; i++) { |
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181 | int r = cmpfnc( |
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182 | ucx_array_at(array1, i), |
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183 | ucx_array_at(array2, i), |
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184 | data); |
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185 | if (r != 0) |
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186 | return 0; |
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187 | } |
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188 | return 1; |
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189 | } |
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190 | } |
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191 | |
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192 | void ucx_array_destroy(UcxArray *array) { |
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193 | if(array->data) |
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194 | alfree(array->allocator, array->data); |
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195 | array->data = NULL; |
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196 | array->capacity = array->size = 0; |
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197 | } |
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198 | |
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199 | void ucx_array_free(UcxArray *array) { |
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200 | ucx_array_destroy(array); |
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201 | alfree(array->allocator, array); |
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202 | } |
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203 | |
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204 | int ucx_array_append_from(UcxArray *array, void *data, size_t count) { |
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205 | if (ucx_array_ensurecap(array, array->size + count)) |
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206 | return 1; |
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207 | |
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208 | void* dest = ucx_array_at(array, array->size); |
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209 | if (data) { |
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210 | memcpy(dest, data, array->elemsize*count); |
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211 | } else { |
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212 | memset(dest, 0, array->elemsize*count); |
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213 | } |
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214 | array->size += count; |
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215 | |
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216 | return 0; |
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217 | } |
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218 | |
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219 | int ucx_array_prepend_from(UcxArray *array, void *data, size_t count) { |
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220 | if (ucx_array_ensurecap(array, array->size + count)) |
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221 | return 1; |
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222 | |
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223 | if (array->size > 0) { |
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224 | void *dest = ucx_array_at(array, count); |
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225 | memmove(dest, array->data, array->elemsize*array->size); |
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226 | } |
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227 | |
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228 | if (data) { |
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229 | memcpy(array->data, data, array->elemsize*count); |
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230 | } else { |
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231 | memset(array->data, 0, array->elemsize*count); |
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232 | } |
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233 | array->size += count; |
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234 | |
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235 | return 0; |
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236 | } |
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237 | |
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238 | int ucx_array_set_from(UcxArray *array, size_t index, |
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239 | void *data, size_t count) { |
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240 | if (ucx_array_ensurecap(array, index + count)) |
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241 | return 1; |
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242 | |
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243 | if (index+count > array->size) { |
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244 | array->size = index+count; |
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245 | } |
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246 | |
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247 | void *dest = ucx_array_at(array, index); |
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248 | if (data) { |
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249 | memcpy(dest, data, array->elemsize*count); |
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250 | } else { |
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251 | memset(dest, 0, array->elemsize*count); |
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252 | } |
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253 | |
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254 | return 0; |
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255 | } |
8 | 256 | |
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257 | int ucx_array_appendv(UcxArray *array, ...) { |
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258 | va_list ap; |
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259 | va_start(ap, array); |
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260 | int elem = va_arg(ap, int); |
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261 | int ret = ucx_array_append_from(array, &elem, 1); |
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262 | va_end(ap); |
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263 | return ret; |
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264 | } |
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265 | |
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266 | int ucx_array_prependv(UcxArray *array, ...) { |
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267 | va_list ap; |
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268 | va_start(ap, array); |
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269 | int elem = va_arg(ap, int); |
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270 | int ret = ucx_array_prepend_from(array, &elem, 1); |
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271 | va_end(ap); |
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272 | return ret; |
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273 | } |
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274 | |
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275 | int ucx_array_setv(UcxArray *array, size_t index, ...) { |
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276 | va_list ap; |
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277 | va_start(ap, index); |
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278 | int elem = va_arg(ap, int); |
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279 | int ret = ucx_array_set_from(array, index, &elem, 1); |
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280 | va_end(ap); |
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281 | return ret; |
337 | 282 | } |
283 | ||
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284 | int ucx_array_concat(UcxArray *array1, const UcxArray *array2) { |
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285 | |
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286 | if (array1->elemsize != array2->elemsize) |
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287 | return 1; |
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288 | |
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289 | size_t capacity = array1->capacity+array2->capacity; |
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290 | |
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291 | if (array1->capacity < capacity) { |
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292 | if (ucx_array_reserve(array1, capacity)) { |
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293 | return 1; |
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294 | } |
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295 | } |
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296 | |
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297 | void* dest = ucx_array_at(array1, array1->size); |
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298 | memcpy(dest, array2->data, array2->size*array2->elemsize); |
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299 | |
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300 | array1->size += array2->size; |
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301 | |
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302 | return 0; |
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303 | } |
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304 | |
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305 | void *ucx_array_at(UcxArray const *array, size_t index) { |
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306 | char* memory = array->data; |
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307 | char* loc = memory + index*array->elemsize; |
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308 | return loc; |
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309 | } |
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310 | |
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311 | size_t ucx_array_find(UcxArray const *array, void *elem, |
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312 | cmp_func cmpfnc, void *data) { |
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313 | |
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314 | size_t elemsize; |
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315 | if (cmpfnc == NULL) { |
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316 | cmpfnc = ucx_cmp_mem; |
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317 | elemsize = array->elemsize; |
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318 | data = &elemsize; |
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319 | } |
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320 | |
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321 | if (array->size > 0) { |
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322 | for (size_t i = 0 ; i < array->size ; i++) { |
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323 | void* ptr = ucx_array_at(array, i); |
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324 | if (cmpfnc(ptr, elem, data) == 0) { |
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325 | return i; |
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326 | } |
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327 | } |
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328 | return array->size; |
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329 | } else { |
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330 | return 0; |
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331 | } |
334
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332 | } |
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333 | |
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334 | int ucx_array_contains(UcxArray const *array, void *elem, |
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335 | cmp_func cmpfnc, void *data) { |
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336 | return ucx_array_find(array, elem, cmpfnc, data) != array->size; |
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337 | } |
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338 | |
345
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339 | static void ucx_mergesort_merge(void *arrdata,size_t elemsize, |
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340 | cmp_func cmpfnc, void *data, |
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341 | size_t start, size_t mid, size_t end) { |
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342 | |
345
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343 | char* array = arrdata; |
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344 | |
336
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345 | size_t rightstart = mid + 1; |
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346 | |
345
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347 | if (cmpfnc(array + mid*elemsize, |
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348 | array + rightstart*elemsize, data) <= 0) { |
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349 | /* already sorted */ |
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350 | return; |
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351 | } |
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352 | |
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353 | /* we need memory for one element */ |
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354 | void *value = malloc(elemsize); |
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355 | |
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356 | while (start <= mid && rightstart <= end) { |
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357 | if (cmpfnc(array + start*elemsize, |
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358 | array + rightstart*elemsize, data) <= 0) { |
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359 | start++; |
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360 | } else { |
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361 | /* save the value from the right */ |
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362 | memcpy(value, array + rightstart*elemsize, elemsize); |
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363 | |
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364 | /* shift all left elements one element to the right */ |
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365 | size_t shiftcount = rightstart-start; |
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366 | void *startptr = array + start*elemsize; |
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367 | void *dest = array + (start+1)*elemsize; |
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368 | memmove(dest, startptr, shiftcount*elemsize); |
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369 | |
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370 | /* bring the first value from the right to the left */ |
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371 | memcpy(startptr, value, elemsize); |
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372 | |
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373 | start++; |
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374 | mid++; |
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375 | rightstart++; |
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376 | } |
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377 | } |
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378 | |
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379 | /* free the temporary memory */ |
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380 | free(value); |
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381 | } |
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382 | |
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383 | static void ucx_mergesort_impl(void *arrdata, size_t elemsize, |
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384 | cmp_func cmpfnc, void *data, size_t l, size_t r) { |
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385 | if (l < r) { |
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386 | size_t m = l + (r - l) / 2; |
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387 | |
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388 | ucx_mergesort_impl(arrdata, elemsize, cmpfnc, data, l, m); |
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389 | ucx_mergesort_impl(arrdata, elemsize, cmpfnc, data, m + 1, r); |
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390 | ucx_mergesort_merge(arrdata, elemsize, cmpfnc, data, l, m, r); |
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391 | } |
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392 | } |
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393 | |
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394 | static void ucx_mergesort(void *arrdata, size_t count, size_t elemsize, |
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395 | cmp_func cmpfnc, void *data) { |
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396 | |
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397 | ucx_mergesort_impl(arrdata, elemsize, cmpfnc, data, 0, count-1); |
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398 | } |
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399 | |
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400 | #ifdef USE_UCX_QSORT_R |
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401 | struct cmpfnc_swapargs_info { |
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402 | cmp_func func; |
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403 | void *data; |
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404 | }; |
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405 | |
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406 | static int cmp_func_swap_args(void *data, const void *x, const void *y) { |
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407 | cmpfnc_swapargs_info* info = data; |
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408 | return info->func(x, y, info->data); |
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409 | } |
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410 | |
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411 | static void ucx_qsort_r(void *array, size_t count, size_t elemsize, |
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412 | cmp_func cmpfnc, void *data) { |
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413 | struct cmpfnc_swapargs_info info; |
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414 | info.func = cmpfnc; |
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415 | info.data = data; |
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416 | qsort_r(array, count, elemsize, &info, cmp_func_swap_args); |
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417 | } |
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418 | #endif /* USE_UCX_QSORT_R */ |
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419 | |
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420 | void ucx_array_sort(UcxArray* array, cmp_func cmpfnc, void *data) { |
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421 | ucx_array_sort_impl(array->data, array->size, array->elemsize, |
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422 | cmpfnc, data); |
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423 | } |
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424 | |
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425 | void ucx_array_remove(UcxArray *array, size_t index) { |
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426 | array->size--; |
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427 | if (index < array->size) { |
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428 | void* dest = ucx_array_at(array, index); |
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429 | void* src = ucx_array_at(array, index+1); |
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430 | memmove(dest, src, (array->size - index)*array->elemsize); |
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431 | } |
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432 | } |
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433 | |
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434 | void ucx_array_remove_fast(UcxArray *array, size_t index) { |
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435 | array->size--; |
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436 | if (index < array->size) { |
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437 | void* dest = ucx_array_at(array, index); |
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438 | void* src = ucx_array_at(array, array->size); |
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439 | memcpy(dest, src, array->elemsize); |
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440 | } |
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441 | } |
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442 | |
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443 | int ucx_array_shrink(UcxArray* array) { |
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444 | void* newptr = alrealloc(array->allocator, array->data, |
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445 | array->size*array->elemsize); |
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446 | if (newptr) { |
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447 | array->data = newptr; |
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448 | array->capacity = array->size; |
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449 | return 0; |
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450 | } else { |
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451 | return 1; |
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452 | } |
13 | 453 | } |
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454 | |
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455 | int ucx_array_resize(UcxArray* array, size_t capacity) { |
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456 | if (array->capacity >= capacity) { |
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457 | void* newptr = alrealloc(array->allocator, array->data, |
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458 | capacity*array->elemsize); |
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459 | if (newptr) { |
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460 | array->data = newptr; |
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461 | array->capacity = capacity; |
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462 | if (array->size > array->capacity) { |
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463 | array->size = array->capacity; |
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464 | } |
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465 | return 0; |
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466 | } else { |
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467 | return 1; |
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468 | } |
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469 | } else { |
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470 | return ucx_array_reserve(array, capacity); |
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471 | } |
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472 | } |
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473 | |
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474 | int ucx_array_reserve(UcxArray* array, size_t capacity) { |
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475 | if (array->capacity > capacity) { |
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476 | return 0; |
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477 | } else { |
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478 | void* newptr = alrealloc(array->allocator, array->data, |
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479 | capacity*array->elemsize); |
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480 | if (newptr) { |
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481 | array->data = newptr; |
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482 | array->capacity = capacity; |
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483 | return 0; |
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484 | } else { |
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485 | return 1; |
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486 | } |
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487 | } |
22
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488 | } |