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annotate lib/gl_array_oset.c @ 17587:344018b6e5d7

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maint: update copyright I ran 'make update-copyright'. Signed-off-by: Eric Blake <eblake@redhat.com>
author Eric Blake <eblake@redhat.com>
date Wed, 01 Jan 2014 00:04:40 -0700
parents e542fd46ad6f
children ab58d4870664
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /* Ordered set data type implemented by an array.
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2 Copyright (C) 2006-2007, 2009-2014 Free Software Foundation, Inc.
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3 Written by Bruno Haible <bruno@clisp.org>, 2006.
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4
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5 This program is free software: you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published by
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7 the Free Software Foundation; either version 3 of the License, or
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8 (at your option) any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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17
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18 #include <config.h>
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19
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20 /* Specification. */
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21 #include "gl_array_oset.h"
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22
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23 #include <stdlib.h>
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24
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25 /* Checked size_t computations. */
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26 #include "xsize.h"
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27
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28 /* -------------------------- gl_oset_t Data Type -------------------------- */
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29
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30 /* Concrete gl_oset_impl type, valid for this file only. */
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31 struct gl_oset_impl
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32 {
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33 struct gl_oset_impl_base base;
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34 /* An array of ALLOCATED elements, of which the first COUNT are used.
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35 0 <= COUNT <= ALLOCATED. */
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36 const void **elements;
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37 size_t count;
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38 size_t allocated;
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39 };
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40
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41 static gl_oset_t
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42 gl_array_nx_create_empty (gl_oset_implementation_t implementation,
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43 gl_setelement_compar_fn compar_fn,
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44 gl_setelement_dispose_fn dispose_fn)
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45 {
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46 struct gl_oset_impl *set =
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47 (struct gl_oset_impl *) malloc (sizeof (struct gl_oset_impl));
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48
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49 if (set == NULL)
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50 return NULL;
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51
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52 set->base.vtable = implementation;
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53 set->base.compar_fn = compar_fn;
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54 set->base.dispose_fn = dispose_fn;
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55 set->elements = NULL;
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56 set->count = 0;
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57 set->allocated = 0;
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58
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59 return set;
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60 }
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61
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62 static size_t
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63 gl_array_size (gl_oset_t set)
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64 {
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65 return set->count;
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66 }
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67
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68 static size_t
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69 gl_array_indexof (gl_oset_t set, const void *elt)
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70 {
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71 size_t count = set->count;
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72
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73 if (count > 0)
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74 {
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75 gl_setelement_compar_fn compar = set->base.compar_fn;
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76 size_t low = 0;
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77 size_t high = count;
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78
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79 /* At each loop iteration, low < high; for indices < low the values
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80 are smaller than ELT; for indices >= high the values are greater
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81 than ELT. So, if the element occurs in the list, it is at
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82 low <= position < high. */
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83 do
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84 {
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85 size_t mid = low + (high - low) / 2; /* low <= mid < high */
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86 int cmp = (compar != NULL
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87 ? compar (set->elements[mid], elt)
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88 : (set->elements[mid] > elt ? 1 :
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89 set->elements[mid] < elt ? -1 : 0));
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90
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91 if (cmp < 0)
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92 low = mid + 1;
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93 else if (cmp > 0)
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94 high = mid;
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95 else /* cmp == 0 */
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96 /* We have an element equal to ELT at index MID. */
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97 return mid;
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98 }
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99 while (low < high);
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100 }
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101 return (size_t)(-1);
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102 }
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103
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104 static bool
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105 gl_array_search (gl_oset_t set, const void *elt)
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106 {
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107 return gl_array_indexof (set, elt) != (size_t)(-1);
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108 }
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109
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110 static bool
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111 gl_array_search_atleast (gl_oset_t set,
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112 gl_setelement_threshold_fn threshold_fn,
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113 const void *threshold,
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114 const void **eltp)
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115 {
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116 size_t count = set->count;
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117
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118 if (count > 0)
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119 {
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120 size_t low = 0;
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121 size_t high = count;
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122
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123 /* At each loop iteration, low < high; for indices < low the values are
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124 smaller than THRESHOLD; for indices >= high the values are nonexistent.
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125 So, if an element >= THRESHOLD occurs in the list, it is at
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126 low <= position < high. */
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127 do
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128 {
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129 size_t mid = low + (high - low) / 2; /* low <= mid < high */
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130
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131 if (! threshold_fn (set->elements[mid], threshold))
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132 low = mid + 1;
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133 else
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134 {
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135 /* We have an element >= THRESHOLD at index MID. But we need the
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136 minimal such index. */
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137 high = mid;
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138 /* At each loop iteration, low <= high and
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139 compar (list->elements[high], value) >= 0,
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140 and we know that the first occurrence of the element is at
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parents: 9309
diff changeset
141 low <= position <= high. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
142 while (low < high)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
143 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
144 size_t mid2 = low + (high - low) / 2; /* low <= mid2 < high */
7403
2fbd1f779c5f Add a search_atleast operation.
Bruno Haible <bruno@clisp.org>
parents: 7401
diff changeset
145
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
146 if (! threshold_fn (set->elements[mid2], threshold))
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
147 low = mid2 + 1;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
148 else
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
149 high = mid2;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
150 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
151 *eltp = set->elements[low];
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
152 return true;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
153 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
154 }
7403
2fbd1f779c5f Add a search_atleast operation.
Bruno Haible <bruno@clisp.org>
parents: 7401
diff changeset
155 while (low < high);
2fbd1f779c5f Add a search_atleast operation.
Bruno Haible <bruno@clisp.org>
parents: 7401
diff changeset
156 }
2fbd1f779c5f Add a search_atleast operation.
Bruno Haible <bruno@clisp.org>
parents: 7401
diff changeset
157 return false;
2fbd1f779c5f Add a search_atleast operation.
Bruno Haible <bruno@clisp.org>
parents: 7401
diff changeset
158 }
2fbd1f779c5f Add a search_atleast operation.
Bruno Haible <bruno@clisp.org>
parents: 7401
diff changeset
159
12444
29d240cb21b2 Move the malloc checking from module 'oset' to new module 'xoset'.
Bruno Haible <bruno@clisp.org>
parents: 12421
diff changeset
160 /* Ensure that set->allocated > set->count.
29d240cb21b2 Move the malloc checking from module 'oset' to new module 'xoset'.
Bruno Haible <bruno@clisp.org>
parents: 12421
diff changeset
161 Return 0 upon success, -1 upon out-of-memory. */
29d240cb21b2 Move the malloc checking from module 'oset' to new module 'xoset'.
Bruno Haible <bruno@clisp.org>
parents: 12421
diff changeset
162 static int
6976
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
163 grow (gl_oset_t set)
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
164 {
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
165 size_t new_allocated;
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
166 size_t memory_size;
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
167 const void **memory;
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
168
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
169 new_allocated = xtimes (set->allocated, 2);
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
170 new_allocated = xsum (new_allocated, 1);
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
171 memory_size = xtimes (new_allocated, sizeof (const void *));
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
172 if (size_overflow_p (memory_size))
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
173 /* Overflow, would lead to out of memory. */
12444
29d240cb21b2 Move the malloc checking from module 'oset' to new module 'xoset'.
Bruno Haible <bruno@clisp.org>
parents: 12421
diff changeset
174 return -1;
29d240cb21b2 Move the malloc checking from module 'oset' to new module 'xoset'.
Bruno Haible <bruno@clisp.org>
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diff changeset
175 memory = (const void **) realloc (set->elements, memory_size);
6976
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
176 if (memory == NULL)
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
177 /* Out of memory. */
12444
29d240cb21b2 Move the malloc checking from module 'oset' to new module 'xoset'.
Bruno Haible <bruno@clisp.org>
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diff changeset
178 return -1;
6976
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
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diff changeset
179 set->elements = memory;
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
180 set->allocated = new_allocated;
12444
29d240cb21b2 Move the malloc checking from module 'oset' to new module 'xoset'.
Bruno Haible <bruno@clisp.org>
parents: 12421
diff changeset
181 return 0;
6976
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
182 }
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
183
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
184 /* Add the given element ELT at the given position,
12444
29d240cb21b2 Move the malloc checking from module 'oset' to new module 'xoset'.
Bruno Haible <bruno@clisp.org>
parents: 12421
diff changeset
185 0 <= position <= gl_oset_size (set).
29d240cb21b2 Move the malloc checking from module 'oset' to new module 'xoset'.
Bruno Haible <bruno@clisp.org>
parents: 12421
diff changeset
186 Return 1 upon success, -1 upon out-of-memory. */
17179
bbfb83985261 array-oset, linkedhash-list, rbtree-oset: no need for 'inline'
Paul Eggert <eggert@cs.ucla.edu>
parents: 16201
diff changeset
187 static int
12444
29d240cb21b2 Move the malloc checking from module 'oset' to new module 'xoset'.
Bruno Haible <bruno@clisp.org>
parents: 12421
diff changeset
188 gl_array_nx_add_at (gl_oset_t set, size_t position, const void *elt)
6976
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
189 {
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
190 size_t count = set->count;
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
191 const void **elements;
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
192 size_t i;
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
193
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
194 if (count == set->allocated)
12444
29d240cb21b2 Move the malloc checking from module 'oset' to new module 'xoset'.
Bruno Haible <bruno@clisp.org>
parents: 12421
diff changeset
195 if (grow (set) < 0)
29d240cb21b2 Move the malloc checking from module 'oset' to new module 'xoset'.
Bruno Haible <bruno@clisp.org>
parents: 12421
diff changeset
196 return -1;
6976
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
197 elements = set->elements;
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
198 for (i = count; i > position; i--)
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
199 elements[i] = elements[i - 1];
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
200 elements[position] = elt;
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
201 set->count = count + 1;
12444
29d240cb21b2 Move the malloc checking from module 'oset' to new module 'xoset'.
Bruno Haible <bruno@clisp.org>
parents: 12421
diff changeset
202 return 1;
6976
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
203 }
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
204
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
205 /* Remove the element at the given position,
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
206 0 <= position < gl_oset_size (set). */
17179
bbfb83985261 array-oset, linkedhash-list, rbtree-oset: no need for 'inline'
Paul Eggert <eggert@cs.ucla.edu>
parents: 16201
diff changeset
207 static void
6976
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
208 gl_array_remove_at (gl_oset_t set, size_t position)
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
209 {
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
210 size_t count = set->count;
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
211 const void **elements;
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
212 size_t i;
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
213
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
214 elements = set->elements;
8436
36bbb949160c Add an element disposal function.
Bruno Haible <bruno@clisp.org>
parents: 8422
diff changeset
215 if (set->base.dispose_fn != NULL)
36bbb949160c Add an element disposal function.
Bruno Haible <bruno@clisp.org>
parents: 8422
diff changeset
216 set->base.dispose_fn (elements[position]);
6976
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
217 for (i = position + 1; i < count; i++)
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
218 elements[i - 1] = elements[i];
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
219 set->count = count - 1;
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
220 }
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
221
12444
29d240cb21b2 Move the malloc checking from module 'oset' to new module 'xoset'.
Bruno Haible <bruno@clisp.org>
parents: 12421
diff changeset
222 static int
29d240cb21b2 Move the malloc checking from module 'oset' to new module 'xoset'.
Bruno Haible <bruno@clisp.org>
parents: 12421
diff changeset
223 gl_array_nx_add (gl_oset_t set, const void *elt)
6976
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
224 {
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
225 size_t count = set->count;
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
226 size_t low = 0;
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
227
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
228 if (count > 0)
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
229 {
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
230 gl_setelement_compar_fn compar = set->base.compar_fn;
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
231 size_t high = count;
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
232
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
233 /* At each loop iteration, low < high; for indices < low the values
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
234 are smaller than ELT; for indices >= high the values are greater
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
235 than ELT. So, if the element occurs in the list, it is at
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
236 low <= position < high. */
6976
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
237 do
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
238 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
239 size_t mid = low + (high - low) / 2; /* low <= mid < high */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
240 int cmp = (compar != NULL
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
241 ? compar (set->elements[mid], elt)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
242 : (set->elements[mid] > elt ? 1 :
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
243 set->elements[mid] < elt ? -1 : 0));
6976
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
244
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
245 if (cmp < 0)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
246 low = mid + 1;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
247 else if (cmp > 0)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
248 high = mid;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
249 else /* cmp == 0 */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
250 return false;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
251 }
6976
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
252 while (low < high);
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
253 }
12444
29d240cb21b2 Move the malloc checking from module 'oset' to new module 'xoset'.
Bruno Haible <bruno@clisp.org>
parents: 12421
diff changeset
254 return gl_array_nx_add_at (set, low, elt);
6976
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
255 }
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
256
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
257 static bool
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
258 gl_array_remove (gl_oset_t set, const void *elt)
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
259 {
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
260 size_t index = gl_array_indexof (set, elt);
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
261 if (index != (size_t)(-1))
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
262 {
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
263 gl_array_remove_at (set, index);
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
264 return true;
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
265 }
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
266 else
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
267 return false;
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
268 }
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
269
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
270 static void
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
271 gl_array_free (gl_oset_t set)
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
272 {
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
273 if (set->elements != NULL)
8436
36bbb949160c Add an element disposal function.
Bruno Haible <bruno@clisp.org>
parents: 8422
diff changeset
274 {
36bbb949160c Add an element disposal function.
Bruno Haible <bruno@clisp.org>
parents: 8422
diff changeset
275 if (set->base.dispose_fn != NULL)
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
276 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
277 size_t count = set->count;
8436
36bbb949160c Add an element disposal function.
Bruno Haible <bruno@clisp.org>
parents: 8422
diff changeset
278
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
279 if (count > 0)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
280 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
281 gl_setelement_dispose_fn dispose = set->base.dispose_fn;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
282 const void **elements = set->elements;
8436
36bbb949160c Add an element disposal function.
Bruno Haible <bruno@clisp.org>
parents: 8422
diff changeset
283
12421
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284 do
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285 dispose (*elements++);
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286 while (--count > 0);
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287 }
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288 }
8436
36bbb949160c Add an element disposal function.
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289 free (set->elements);
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290 }
6976
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291 free (set);
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292 }
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293
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294 /* --------------------- gl_oset_iterator_t Data Type --------------------- */
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295
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296 static gl_oset_iterator_t
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297 gl_array_iterator (gl_oset_t set)
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298 {
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299 gl_oset_iterator_t result;
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300
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301 result.vtable = set->base.vtable;
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302 result.set = set;
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303 result.count = set->count;
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304 result.p = set->elements + 0;
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305 result.q = set->elements + set->count;
7352
3d5bd6899004 * gl_anylinked_list2.h [lint] (gl_linked_iterator)
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306 #ifdef lint
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307 result.i = 0;
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308 result.j = 0;
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309 #endif
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310
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311 return result;
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312 }
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313
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314 static bool
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315 gl_array_iterator_next (gl_oset_iterator_t *iterator, const void **eltp)
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316 {
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317 gl_oset_t set = iterator->set;
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318 if (iterator->count != set->count)
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319 {
c77399b5682d Ordered set data type implemented by an array.
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320 if (iterator->count != set->count + 1)
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321 /* Concurrent modifications were done on the set. */
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322 abort ();
6976
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323 /* The last returned element was removed. */
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324 iterator->count--;
8422
f968c473e8b7 Make pointer decrementing code ANSI C compliant.
Bruno Haible <bruno@clisp.org>
parents: 7603
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325 iterator->p = (const void **) iterator->p - 1;
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326 iterator->q = (const void **) iterator->q - 1;
6976
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327 }
c77399b5682d Ordered set data type implemented by an array.
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328 if (iterator->p < iterator->q)
c77399b5682d Ordered set data type implemented by an array.
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parents:
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329 {
c77399b5682d Ordered set data type implemented by an array.
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330 const void **p = (const void **) iterator->p;
c77399b5682d Ordered set data type implemented by an array.
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diff changeset
331 *eltp = *p;
c77399b5682d Ordered set data type implemented by an array.
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diff changeset
332 iterator->p = p + 1;
c77399b5682d Ordered set data type implemented by an array.
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333 return true;
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
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diff changeset
334 }
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
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diff changeset
335 else
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
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336 return false;
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
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337 }
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
338
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
339 static void
c77399b5682d Ordered set data type implemented by an array.
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340 gl_array_iterator_free (gl_oset_iterator_t *iterator)
c77399b5682d Ordered set data type implemented by an array.
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diff changeset
341 {
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
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342 }
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
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343
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
344
c77399b5682d Ordered set data type implemented by an array.
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345 const struct gl_oset_implementation gl_array_oset_implementation =
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346 {
12444
29d240cb21b2 Move the malloc checking from module 'oset' to new module 'xoset'.
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parents: 12421
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347 gl_array_nx_create_empty,
6976
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diff changeset
348 gl_array_size,
c77399b5682d Ordered set data type implemented by an array.
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diff changeset
349 gl_array_search,
7403
2fbd1f779c5f Add a search_atleast operation.
Bruno Haible <bruno@clisp.org>
parents: 7401
diff changeset
350 gl_array_search_atleast,
12444
29d240cb21b2 Move the malloc checking from module 'oset' to new module 'xoset'.
Bruno Haible <bruno@clisp.org>
parents: 12421
diff changeset
351 gl_array_nx_add,
6976
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
352 gl_array_remove,
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
353 gl_array_free,
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
354 gl_array_iterator,
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
355 gl_array_iterator_next,
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
356 gl_array_iterator_free
c77399b5682d Ordered set data type implemented by an array.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
357 };