ucx/list.c

Tue, 03 Sep 2013 12:08:35 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Tue, 03 Sep 2013 12:08:35 +0200
changeset 38
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parent 5
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child 70
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permissions
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code cleanup + experimental login prompt

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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 2013 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 #include "list.h"
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30
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31 UcxList *ucx_list_clone(UcxList *l, copy_func fnc, void *data) {
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32 return ucx_list_clone_a(ucx_default_allocator(), l, fnc, data);
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33 }
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34
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35 UcxList *ucx_list_clone_a(UcxAllocator *alloc, UcxList *l,
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36 copy_func fnc, void *data) {
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37 UcxList *ret = NULL;
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38 while (l) {
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39 if (fnc) {
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40 ret = ucx_list_append_a(alloc, ret, fnc(l->data, data));
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41 } else {
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42 ret = ucx_list_append_a(alloc, ret, l->data);
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43 }
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44 l = l->next;
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45 }
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46 return ret;
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47 }
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48
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49 int ucx_list_equals(const UcxList *l1, const UcxList *l2,
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50 cmp_func fnc, void* data) {
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51 if (l1 == l2) return 1;
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52
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53 while (l1 != NULL && l2 != NULL) {
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54 if (fnc == NULL) {
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55 if (l1->data != l2->data) return 0;
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56 } else {
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57 if (fnc(l1->data, l2->data, data) != 0) return 0;
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58 }
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59 l1 = l1->next;
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60 l2 = l2->next;
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61 }
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62
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63 return (l1 == NULL && l2 == NULL);
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64 }
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65
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66 void ucx_list_free(UcxList *l) {
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67 ucx_list_free_a(ucx_default_allocator(), l);
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68 }
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69
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70 void ucx_list_free_a(UcxAllocator *alloc, UcxList *l) {
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71 UcxList *e = l, *f;
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72 while (e != NULL) {
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73 f = e;
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74 e = e->next;
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75 alloc->free(alloc->pool, f);
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76 }
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77 }
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78
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79 UcxList *ucx_list_append(UcxList *l, void *data) {
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80 return ucx_list_append_a(ucx_default_allocator(), l, data);
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81 }
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82
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83 UcxList *ucx_list_append_a(UcxAllocator *alloc, UcxList *l, void *data) {
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84 UcxList *nl = (UcxList*) alloc->malloc(alloc->pool, sizeof(UcxList));
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85 if (!nl) {
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86 return NULL;
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87 }
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88
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89 nl->data = data;
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90 nl->next = NULL;
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91 if (l) {
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92 UcxList *t = ucx_list_last(l);
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93 t->next = nl;
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94 nl->prev = t;
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95 return l;
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96 } else {
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97 nl->prev = NULL;
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98 return nl;
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99 }
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100 }
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101
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102 UcxList *ucx_list_prepend(UcxList *l, void *data) {
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103 return ucx_list_prepend_a(ucx_default_allocator(), l, data);
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104 }
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105
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106 UcxList *ucx_list_prepend_a(UcxAllocator *alloc, UcxList *l, void *data) {
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107 UcxList *nl = ucx_list_append_a(alloc, NULL, data);
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108 if (!nl) {
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109 return NULL;
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110 }
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111 l = ucx_list_first(l);
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112
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113 if (l) {
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114 nl->next = l;
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115 l->prev = nl;
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116 }
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117 return nl;
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118 }
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119
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120 UcxList *ucx_list_concat(UcxList *l1, UcxList *l2) {
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121 if (l1) {
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122 UcxList *last = ucx_list_last(l1);
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123 last->next = l2;
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124 l2->prev = last;
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125 return l1;
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126 } else {
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127 return l2;
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128 }
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129 }
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130
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131 UcxList *ucx_list_last(const UcxList *l) {
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132 if (l == NULL) return NULL;
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133
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134 const UcxList *e = l;
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135 while (e->next != NULL) {
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136 e = e->next;
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137 }
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138 return (UcxList*)e;
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139 }
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140
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141 ssize_t ucx_list_indexof(const UcxList *list, const UcxList *elem) {
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142 ssize_t index = 0;
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143 while (list) {
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diff changeset
144 if (list == elem) {
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145 return index;
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parents: 1
diff changeset
146 }
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diff changeset
147 list = list->next;
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148 index++;
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149 }
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150 return -1;
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parents: 1
diff changeset
151 }
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diff changeset
152
1
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diff changeset
153 UcxList *ucx_list_get(const UcxList *l, int index) {
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154 if (l == NULL) return NULL;
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155
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diff changeset
156 const UcxList *e = l;
5
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diff changeset
157 while (e->next && index > 0) {
1
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158 e = e->next;
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159 index--;
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160 }
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161
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162 return (UcxList*)(index == 0 ? e : NULL);
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163 }
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164
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diff changeset
165 ssize_t ucx_list_find(UcxList *l, void *elem, cmp_func fnc, void *cmpdata) {
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166 ssize_t index = 0;
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diff changeset
167 UCX_FOREACH(e, l) {
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diff changeset
168 if (fnc) {
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169 if (fnc(elem, e->data, cmpdata) == 0) {
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170 return index;
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171 }
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172 } else {
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173 if (elem == e->data) {
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174 return index;
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175 }
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176 }
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177 index++;
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178 }
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179 return -1;
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180 }
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181
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182 int ucx_list_contains(UcxList *l, void *elem, cmp_func fnc, void *cmpdata) {
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183 return ucx_list_find(l, elem, fnc, cmpdata) > -1;
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184 }
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185
1
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186 size_t ucx_list_size(const UcxList *l) {
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187 if (l == NULL) return 0;
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188
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189 const UcxList *e = l;
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190 size_t s = 1;
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191 while (e->next != NULL) {
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192 e = e->next;
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193 s++;
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194 }
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195
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196 return s;
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197 }
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198
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199 UcxList *ucx_list_sort_merge(int length,
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200 UcxList* restrict ls, UcxList* restrict le, UcxList* restrict re,
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201 cmp_func fnc, void* data) {
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202
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203 UcxList** sorted = (UcxList**) malloc(sizeof(UcxList*)*length);
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204 UcxList *rc, *lc;
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205
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206 lc = ls; rc = le;
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207 int n = 0;
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208 while (lc && lc != le && rc != re) {
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209 if (fnc(lc->data, rc->data, data) <= 0) {
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210 sorted[n] = lc;
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211 lc = lc->next;
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212 } else {
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213 sorted[n] = rc;
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214 rc = rc->next;
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215 }
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216 n++;
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217 }
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diff changeset
218 while (lc && lc != le) {
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219 sorted[n] = lc;
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220 lc = lc->next;
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221 n++;
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222 }
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diff changeset
223 while (rc && rc != re) {
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224 sorted[n] = rc;
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225 rc = rc->next;
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226 n++;
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227 }
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228
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229 // Update pointer
5
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diff changeset
230 sorted[0]->prev = NULL;
1
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diff changeset
231 for (int i = 0 ; i < length-1 ; i++) {
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232 sorted[i]->next = sorted[i+1];
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diff changeset
233 sorted[i+1]->prev = sorted[i];
1
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234 }
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diff changeset
235 sorted[length-1]->next = NULL;
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236
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237 UcxList *ret = sorted[0];
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diff changeset
238 free(sorted);
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239 return ret;
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parents:
diff changeset
240 }
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241
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diff changeset
242 UcxList *ucx_list_sort(UcxList *l, cmp_func fnc, void *data) {
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parents:
diff changeset
243 if (l == NULL) {
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diff changeset
244 return NULL;
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245 }
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246
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247 UcxList *lc;
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diff changeset
248 int ln = 1;
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diff changeset
249
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250 UcxList *restrict ls = l, *restrict le, *restrict re;
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diff changeset
251 lc = ls;
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parents:
diff changeset
252 while (lc->next != NULL && fnc(lc->next->data, lc->data, data) > 0) {
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253 lc = lc->next;
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diff changeset
254 ln++;
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parents:
diff changeset
255 }
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diff changeset
256 le = lc->next;
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diff changeset
257
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parents:
diff changeset
258 if (le == NULL) {
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parents:
diff changeset
259 return l; // this list is already sorted :)
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260 } else {
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diff changeset
261 UcxList *rc;
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diff changeset
262 int rn = 1;
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diff changeset
263 rc = le;
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parents:
diff changeset
264 while (rc->next != NULL && fnc(rc->next->data, rc->data, data) > 0) {
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265 rc = rc->next;
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266 rn++;
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diff changeset
267 }
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268 re = rc->next;
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269
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diff changeset
270 // Something left? Sort it!
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271 UcxList *remainder = re;
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272 size_t remainder_length = ucx_list_size(remainder);
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diff changeset
273 if (remainder != NULL) {
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parents:
diff changeset
274 remainder = ucx_list_sort(remainder, fnc, data);
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parents:
diff changeset
275 }
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diff changeset
276
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diff changeset
277 // {ls,...,le->prev} and {rs,...,re->prev} are sorted - merge them
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diff changeset
278 UcxList *sorted = ucx_list_sort_merge(ln+rn,
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diff changeset
279 ls, le, re,
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diff changeset
280 fnc, data);
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281
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diff changeset
282 // merge sorted list with (also sorted) remainder
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parents:
diff changeset
283 l = ucx_list_sort_merge(ln+rn+remainder_length,
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parents:
diff changeset
284 sorted, remainder, NULL, fnc, data);
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285
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diff changeset
286 return l;
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parents:
diff changeset
287 }
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parents:
diff changeset
288 }
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parents:
diff changeset
289
5
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diff changeset
290 UcxList *ucx_list_first(const UcxList *l) {
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diff changeset
291 if (!l) {
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diff changeset
292 return NULL;
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diff changeset
293 }
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diff changeset
294
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diff changeset
295 const UcxList *e = l;
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diff changeset
296 while (e->prev) {
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diff changeset
297 e = e->prev;
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diff changeset
298 }
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diff changeset
299 return (UcxList *)e;
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300 }
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301
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302 UcxList *ucx_list_remove(UcxList *l, UcxList *e) {
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303 return ucx_list_remove_a(ucx_default_allocator(), l, e);
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304 }
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305
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306 UcxList *ucx_list_remove_a(UcxAllocator *alloc, UcxList *l, UcxList *e) {
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307 if (e->prev == NULL) {
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308 if(e->next != NULL) {
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309 e->next->prev = NULL;
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310 l = e->next;
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311 } else {
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312 l = NULL;
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313 }
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314
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315 } else {
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316 e->prev->next = e->next;
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317 e->next->prev = e->prev;
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318 }
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319 alloc->free(alloc->pool, e);
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320 return l;
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321 }

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