1 | /* GLIB - Library of useful routines for C programming |
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2 | * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald |
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3 | * |
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4 | * This library is free software; you can redistribute it and/or |
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5 | * modify it under the terms of the GNU Library General Public |
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6 | * License as published by the Free Software Foundation; either |
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7 | * version 2 of the License, or (at your option) any later version. |
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8 | * |
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9 | * This library is distributed in the hope that it will be useful, |
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10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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12 | * Library General Public License for more details. |
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13 | * |
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14 | * You should have received a copy of the GNU Library General Public |
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15 | * License along with this library; if not, write to the |
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16 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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17 | * Boston, MA 02111-1307, USA. |
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18 | */ |
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19 | |
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20 | /* |
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21 | * Modified by the GLib Team and others 1997-1999. See the AUTHORS |
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22 | * file for a list of people on the GLib Team. See the ChangeLog |
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23 | * files for a list of changes. These files are distributed with |
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24 | * GLib at ftp://ftp.gtk.org/pub/gtk/. |
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25 | */ |
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26 | |
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27 | /* |
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28 | * MT safe |
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29 | */ |
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30 | |
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31 | #include <string.h> |
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32 | #include "glib.h" |
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33 | |
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34 | |
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35 | #define MIN_ARRAY_SIZE 16 |
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36 | |
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37 | |
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38 | typedef struct _GRealArray GRealArray; |
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39 | |
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40 | struct _GRealArray |
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41 | { |
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42 | guint8 *data; |
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43 | guint len; |
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44 | guint alloc; |
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45 | guint elt_size; |
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46 | guint zero_terminated : 1; |
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47 | guint clear : 1; |
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48 | }; |
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49 | |
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50 | |
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51 | static gint g_nearest_pow (gint num); |
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52 | static void g_array_maybe_expand (GRealArray *array, |
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53 | gint len); |
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54 | |
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55 | static GMemChunk *array_mem_chunk = NULL; |
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56 | G_LOCK_DEFINE_STATIC (array_mem_chunk); |
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57 | |
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58 | GArray* |
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59 | g_array_new (gboolean zero_terminated, |
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60 | gboolean clear, |
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61 | guint elt_size) |
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62 | { |
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63 | GRealArray *array; |
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64 | |
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65 | G_LOCK (array_mem_chunk); |
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66 | if (!array_mem_chunk) |
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67 | array_mem_chunk = g_mem_chunk_new ("array mem chunk", |
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68 | sizeof (GRealArray), |
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69 | 1024, G_ALLOC_AND_FREE); |
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70 | |
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71 | array = g_chunk_new (GRealArray, array_mem_chunk); |
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72 | G_UNLOCK (array_mem_chunk); |
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73 | |
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74 | array->data = NULL; |
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75 | array->len = 0; |
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76 | array->alloc = 0; |
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77 | array->zero_terminated = (zero_terminated ? 1 : 0); |
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78 | array->clear = (clear ? 1 : 0); |
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79 | array->elt_size = elt_size; |
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80 | |
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81 | return (GArray*) array; |
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82 | } |
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83 | |
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84 | void |
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85 | g_array_free (GArray *array, |
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86 | gboolean free_segment) |
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87 | { |
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88 | if (free_segment) |
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89 | g_free (array->data); |
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90 | |
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91 | G_LOCK (array_mem_chunk); |
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92 | g_mem_chunk_free (array_mem_chunk, array); |
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93 | G_UNLOCK (array_mem_chunk); |
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94 | } |
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95 | |
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96 | GArray* |
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97 | g_array_append_vals (GArray *farray, |
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98 | gconstpointer data, |
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99 | guint len) |
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100 | { |
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101 | GRealArray *array = (GRealArray*) farray; |
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102 | |
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103 | g_array_maybe_expand (array, len); |
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104 | |
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105 | memcpy (array->data + array->elt_size * array->len, data, array->elt_size * len); |
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106 | |
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107 | array->len += len; |
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108 | |
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109 | return farray; |
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110 | } |
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111 | |
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112 | GArray* |
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113 | g_array_prepend_vals (GArray *farray, |
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114 | gconstpointer data, |
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115 | guint len) |
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116 | { |
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117 | GRealArray *array = (GRealArray*) farray; |
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118 | |
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119 | g_array_maybe_expand (array, len); |
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120 | |
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121 | g_memmove (array->data + array->elt_size * len, array->data, array->elt_size * array->len); |
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122 | |
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123 | memcpy (array->data, data, len * array->elt_size); |
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124 | |
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125 | array->len += len; |
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126 | |
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127 | return farray; |
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128 | } |
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129 | |
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130 | GArray* |
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131 | g_array_insert_vals (GArray *farray, |
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132 | guint index, |
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133 | gconstpointer data, |
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134 | guint len) |
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135 | { |
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136 | GRealArray *array = (GRealArray*) farray; |
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137 | |
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138 | g_array_maybe_expand (array, len); |
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139 | |
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140 | g_memmove (array->data + array->elt_size * (len + index), |
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141 | array->data + array->elt_size * index, |
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142 | array->elt_size * (array->len - index)); |
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143 | |
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144 | memcpy (array->data + array->elt_size * index, data, len * array->elt_size); |
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145 | |
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146 | array->len += len; |
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147 | |
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148 | return farray; |
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149 | } |
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150 | |
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151 | GArray* |
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152 | g_array_set_size (GArray *farray, |
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153 | guint length) |
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154 | { |
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155 | GRealArray *array = (GRealArray*) farray; |
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156 | |
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157 | if (array->len < length) |
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158 | g_array_maybe_expand (array, length - array->len); |
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159 | |
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160 | array->len = length; |
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161 | |
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162 | return farray; |
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163 | } |
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164 | |
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165 | GArray* |
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166 | g_array_remove_index (GArray* farray, |
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167 | guint index) |
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168 | { |
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169 | GRealArray* array = (GRealArray*) farray; |
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170 | |
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171 | g_return_val_if_fail (array, NULL); |
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172 | |
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173 | g_return_val_if_fail (index < array->len, NULL); |
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174 | |
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175 | if (index != array->len - 1) |
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176 | g_memmove (array->data + array->elt_size * index, |
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177 | array->data + array->elt_size * (index + 1), |
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178 | array->elt_size * (array->len - index - 1)); |
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179 | |
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180 | if (array->zero_terminated) |
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181 | memset (array->data + array->elt_size * (array->len - 1), 0, |
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182 | array->elt_size); |
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183 | |
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184 | array->len -= 1; |
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185 | |
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186 | return farray; |
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187 | } |
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188 | |
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189 | GArray* |
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190 | g_array_remove_index_fast (GArray* farray, |
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191 | guint index) |
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192 | { |
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193 | GRealArray* array = (GRealArray*) farray; |
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194 | |
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195 | g_return_val_if_fail (array, NULL); |
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196 | |
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197 | g_return_val_if_fail (index < array->len, NULL); |
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198 | |
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199 | if (index != array->len - 1) |
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200 | g_memmove (array->data + array->elt_size * index, |
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201 | array->data + array->elt_size * (array->len - 1), |
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202 | array->elt_size); |
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203 | |
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204 | if (array->zero_terminated) |
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205 | memset (array->data + array->elt_size * (array->len - 1), 0, |
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206 | array->elt_size); |
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207 | |
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208 | array->len -= 1; |
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209 | |
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210 | return farray; |
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211 | } |
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212 | |
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213 | static gint |
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214 | g_nearest_pow (gint num) |
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215 | { |
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216 | gint n = 1; |
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217 | |
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218 | while (n < num) |
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219 | n <<= 1; |
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220 | |
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221 | return n; |
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222 | } |
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223 | |
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224 | static void |
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225 | g_array_maybe_expand (GRealArray *array, |
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226 | gint len) |
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227 | { |
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228 | guint want_alloc = (array->len + len + array->zero_terminated) * array->elt_size; |
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229 | |
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230 | if (want_alloc > array->alloc) |
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231 | { |
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232 | guint old_alloc = array->alloc; |
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233 | |
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234 | array->alloc = g_nearest_pow (want_alloc); |
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235 | array->alloc = MAX (array->alloc, MIN_ARRAY_SIZE); |
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236 | |
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237 | array->data = g_realloc (array->data, array->alloc); |
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238 | |
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239 | if (array->clear || array->zero_terminated) |
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240 | memset (array->data + old_alloc, 0, array->alloc - old_alloc); |
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241 | } |
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242 | } |
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243 | |
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244 | /* Pointer Array |
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245 | */ |
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246 | |
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247 | typedef struct _GRealPtrArray GRealPtrArray; |
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248 | |
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249 | struct _GRealPtrArray |
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250 | { |
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251 | gpointer *pdata; |
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252 | guint len; |
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253 | guint alloc; |
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254 | }; |
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255 | |
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256 | static void g_ptr_array_maybe_expand (GRealPtrArray *array, |
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257 | gint len); |
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258 | |
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259 | static GMemChunk *ptr_array_mem_chunk = NULL; |
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260 | G_LOCK_DEFINE_STATIC (ptr_array_mem_chunk); |
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261 | |
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262 | |
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263 | GPtrArray* |
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264 | g_ptr_array_new (void) |
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265 | { |
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266 | GRealPtrArray *array; |
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267 | |
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268 | G_LOCK (ptr_array_mem_chunk); |
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269 | if (!ptr_array_mem_chunk) |
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270 | ptr_array_mem_chunk = g_mem_chunk_new ("array mem chunk", |
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271 | sizeof (GRealPtrArray), |
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272 | 1024, G_ALLOC_AND_FREE); |
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273 | |
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274 | array = g_chunk_new (GRealPtrArray, ptr_array_mem_chunk); |
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275 | G_UNLOCK (ptr_array_mem_chunk); |
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276 | |
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277 | array->pdata = NULL; |
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278 | array->len = 0; |
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279 | array->alloc = 0; |
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280 | |
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281 | return (GPtrArray*) array; |
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282 | } |
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283 | |
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284 | void |
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285 | g_ptr_array_free (GPtrArray *array, |
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286 | gboolean free_segment) |
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287 | { |
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288 | g_return_if_fail (array); |
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289 | |
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290 | if (free_segment) |
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291 | g_free (array->pdata); |
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292 | |
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293 | G_LOCK (ptr_array_mem_chunk); |
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294 | g_mem_chunk_free (ptr_array_mem_chunk, array); |
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295 | G_UNLOCK (ptr_array_mem_chunk); |
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296 | } |
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297 | |
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298 | static void |
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299 | g_ptr_array_maybe_expand (GRealPtrArray *array, |
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300 | gint len) |
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301 | { |
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302 | guint old_alloc; |
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303 | |
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304 | if ((array->len + len) > array->alloc) |
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305 | { |
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306 | old_alloc = array->alloc; |
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307 | |
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308 | array->alloc = g_nearest_pow (array->len + len); |
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309 | array->alloc = MAX (array->alloc, MIN_ARRAY_SIZE); |
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310 | if (array->pdata) |
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311 | array->pdata = g_realloc (array->pdata, sizeof(gpointer) * array->alloc); |
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312 | else |
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313 | array->pdata = g_new0 (gpointer, array->alloc); |
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314 | |
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315 | memset (array->pdata + old_alloc, 0, |
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316 | sizeof (gpointer) * (array->alloc - old_alloc)); |
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317 | } |
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318 | } |
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319 | |
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320 | void |
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321 | g_ptr_array_set_size (GPtrArray *farray, |
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322 | gint length) |
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323 | { |
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324 | GRealPtrArray* array = (GRealPtrArray*) farray; |
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325 | |
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326 | g_return_if_fail (array); |
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327 | |
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328 | if (length > array->len) |
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329 | g_ptr_array_maybe_expand (array, (length - array->len)); |
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330 | |
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331 | array->len = length; |
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332 | } |
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333 | |
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334 | gpointer |
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335 | g_ptr_array_remove_index (GPtrArray* farray, |
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336 | guint index) |
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337 | { |
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338 | GRealPtrArray* array = (GRealPtrArray*) farray; |
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339 | gpointer result; |
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340 | |
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341 | g_return_val_if_fail (array, NULL); |
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342 | |
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343 | g_return_val_if_fail (index < array->len, NULL); |
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344 | |
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345 | result = array->pdata[index]; |
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346 | |
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347 | if (index != array->len - 1) |
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348 | g_memmove (array->pdata + index, array->pdata + index + 1, |
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349 | sizeof (gpointer) * (array->len - index - 1)); |
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350 | |
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351 | array->pdata[array->len - 1] = NULL; |
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352 | |
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353 | array->len -= 1; |
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354 | |
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355 | return result; |
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356 | } |
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357 | |
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358 | gpointer |
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359 | g_ptr_array_remove_index_fast (GPtrArray* farray, |
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360 | guint index) |
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361 | { |
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362 | GRealPtrArray* array = (GRealPtrArray*) farray; |
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363 | gpointer result; |
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364 | |
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365 | g_return_val_if_fail (array, NULL); |
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366 | |
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367 | g_return_val_if_fail (index < array->len, NULL); |
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368 | |
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369 | result = array->pdata[index]; |
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370 | |
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371 | if (index != array->len - 1) |
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372 | array->pdata[index] = array->pdata[array->len - 1]; |
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373 | |
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374 | array->pdata[array->len - 1] = NULL; |
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375 | |
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376 | array->len -= 1; |
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377 | |
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378 | return result; |
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379 | } |
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380 | |
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381 | gboolean |
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382 | g_ptr_array_remove (GPtrArray* farray, |
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383 | gpointer data) |
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384 | { |
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385 | GRealPtrArray* array = (GRealPtrArray*) farray; |
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386 | int i; |
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387 | |
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388 | g_return_val_if_fail (array, FALSE); |
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389 | |
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390 | for (i = 0; i < array->len; i += 1) |
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391 | { |
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392 | if (array->pdata[i] == data) |
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393 | { |
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394 | g_ptr_array_remove_index (farray, i); |
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395 | return TRUE; |
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396 | } |
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397 | } |
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398 | |
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399 | return FALSE; |
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400 | } |
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401 | |
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402 | gboolean |
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403 | g_ptr_array_remove_fast (GPtrArray* farray, |
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404 | gpointer data) |
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405 | { |
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406 | GRealPtrArray* array = (GRealPtrArray*) farray; |
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407 | int i; |
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408 | |
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409 | g_return_val_if_fail (array, FALSE); |
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410 | |
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411 | for (i = 0; i < array->len; i += 1) |
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412 | { |
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413 | if (array->pdata[i] == data) |
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414 | { |
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415 | g_ptr_array_remove_index_fast (farray, i); |
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416 | return TRUE; |
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417 | } |
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418 | } |
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419 | |
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420 | return FALSE; |
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421 | } |
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422 | |
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423 | void |
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424 | g_ptr_array_add (GPtrArray* farray, |
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425 | gpointer data) |
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426 | { |
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427 | GRealPtrArray* array = (GRealPtrArray*) farray; |
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428 | |
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429 | g_return_if_fail (array); |
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430 | |
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431 | g_ptr_array_maybe_expand (array, 1); |
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432 | |
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433 | array->pdata[array->len++] = data; |
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434 | } |
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435 | |
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436 | /* Byte arrays |
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437 | */ |
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438 | |
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439 | GByteArray* g_byte_array_new (void) |
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440 | { |
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441 | return (GByteArray*) g_array_new (FALSE, FALSE, 1); |
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442 | } |
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443 | |
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444 | void g_byte_array_free (GByteArray *array, |
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445 | gboolean free_segment) |
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446 | { |
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447 | g_array_free ((GArray*) array, free_segment); |
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448 | } |
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449 | |
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450 | GByteArray* g_byte_array_append (GByteArray *array, |
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451 | const guint8 *data, |
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452 | guint len) |
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453 | { |
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454 | g_array_append_vals ((GArray*) array, (guint8*)data, len); |
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455 | |
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456 | return array; |
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457 | } |
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458 | |
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459 | GByteArray* g_byte_array_prepend (GByteArray *array, |
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460 | const guint8 *data, |
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461 | guint len) |
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462 | { |
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463 | g_array_prepend_vals ((GArray*) array, (guint8*)data, len); |
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464 | |
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465 | return array; |
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466 | } |
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467 | |
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468 | GByteArray* g_byte_array_set_size (GByteArray *array, |
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469 | guint length) |
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470 | { |
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471 | g_array_set_size ((GArray*) array, length); |
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472 | |
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473 | return array; |
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474 | } |
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475 | |
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476 | GByteArray* g_byte_array_remove_index (GByteArray *array, |
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477 | guint index) |
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478 | { |
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479 | g_array_remove_index((GArray*) array, index); |
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480 | |
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481 | return array; |
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482 | } |
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483 | |
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484 | GByteArray* g_byte_array_remove_index_fast (GByteArray *array, |
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485 | guint index) |
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486 | { |
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487 | g_array_remove_index_fast((GArray*) array, index); |
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488 | |
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489 | return array; |
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490 | } |
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