Mercurial > dovecot > original-hg > dovecot-1.2

annotate src/lib-index/mail-index-transaction-view.c @ 2918:7039fc53b4c8 HEAD

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If extension data changes was actually found from transaction view, it was returned wrong. Caused problems with cache file.
author Timo Sirainen <tss@iki.fi>
date Mon, 29 Nov 2004 19:22:40 +0200
parents 642ba9cd3dac
children 0df3f5d71958
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1 /* Copyright (C) 2004 Timo Sirainen */
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2
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3 #include "lib.h"
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4 #include "buffer.h"
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5 #include "mail-index-private.h"
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6 #include "mail-index-view-private.h"
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7 #include "mail-index-transaction-private.h"
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8
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9 struct mail_index_view_transaction {
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10 struct mail_index_view view;
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11 struct mail_index_view_methods *parent;
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12 struct mail_index_transaction *t;
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13 };
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14
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15 static void _tview_close(struct mail_index_view *view)
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16 {
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17 struct mail_index_view_transaction *tview =
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18 (struct mail_index_view_transaction *)view;
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19
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20 mail_index_transaction_unref(tview->t);
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21 tview->parent->close(view);
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22 }
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23
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24 static uint32_t _tview_get_message_count(struct mail_index_view *view)
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25 {
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26 struct mail_index_view_transaction *tview =
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27 (struct mail_index_view_transaction *)view;
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28
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29 return view->hdr.messages_count +
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30 (tview->t->last_new_seq == 0 ? 0 :
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31 tview->t->last_new_seq - tview->t->first_new_seq);
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32 }
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33
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34 static const struct mail_index_header *
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35 _tview_get_header(struct mail_index_view *view)
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36 {
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37 struct mail_index_view_transaction *tview =
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38 (struct mail_index_view_transaction *)view;
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39
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40 /* FIXME: header counters may not be correct */
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41 return tview->parent->get_header(view);
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42 }
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43
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44 static int _tview_lookup_full(struct mail_index_view *view, uint32_t seq,
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45 struct mail_index_map **map_r,
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46 const struct mail_index_record **rec_r)
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47 {
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48 struct mail_index_view_transaction *tview =
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49 (struct mail_index_view_transaction *)view;
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50
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51 if (seq >= tview->t->first_new_seq) {
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52 /* FIXME: is this right to return index map..?
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53 it's not there yet. */
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54 *map_r = view->index->map;
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55 *rec_r = mail_index_transaction_lookup(tview->t, seq);
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56 return 1;
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57 } else {
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58 return tview->parent->lookup_full(view, seq, map_r, rec_r);
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59 }
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60 }
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61
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62 static int _tview_lookup_uid(struct mail_index_view *view, uint32_t seq,
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63 uint32_t *uid_r)
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64 {
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65 struct mail_index_view_transaction *tview =
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66 (struct mail_index_view_transaction *)view;
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67
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68 if (seq >= tview->t->first_new_seq) {
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69 *uid_r = mail_index_transaction_lookup(tview->t, seq)->uid;
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70 return 0;
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71 } else {
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72 return tview->parent->lookup_uid(view, seq, uid_r);
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73 }
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74 }
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75
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76 static int _tview_lookup_uid_range(struct mail_index_view *view,
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77 uint32_t first_uid, uint32_t last_uid,
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78 uint32_t *first_seq_r, uint32_t *last_seq_r)
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79 {
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80 struct mail_index_view_transaction *tview =
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81 (struct mail_index_view_transaction *)view;
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82
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83 if (tview->parent->lookup_uid_range(view, first_uid, last_uid,
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84 first_seq_r, last_seq_r) < 0)
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85 return -1;
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86
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87 /* FIXME: we don't need this function yet.. new UIDs might be 0 as
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88 well.. */
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89
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90 if (*first_seq_r == 0) {
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91 /* nothing found, either doesn't exist or it's completely
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92 newly appended. */
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93 } else if (*last_seq_r + 1 == tview->t->first_new_seq) {
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94 /* last_seq_r may be growed from transactions */
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95 }
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96
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97 return 0;
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98 }
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99
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100 static int _tview_lookup_first(struct mail_index_view *view,
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101 enum mail_flags flags, uint8_t flags_mask,
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102 uint32_t *seq_r)
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103 {
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104 struct mail_index_view_transaction *tview =
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105 (struct mail_index_view_transaction *)view;
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106 const struct mail_index_record *rec;
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107 uint32_t seq, message_count;
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108
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109 if (tview->parent->lookup_first(view, flags, flags_mask, seq_r) < 0)
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110 return -1;
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111
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112 if (*seq_r != 0)
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113 return 0;
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114
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115 rec = buffer_get_data(tview->t->appends, NULL);
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116 seq = tview->t->first_new_seq;
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117 message_count = tview->t->last_new_seq;
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118 for (; seq <= message_count; seq++, rec++) {
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119 if ((rec->flags & flags_mask) == (uint8_t)flags) {
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120 *seq_r = seq;
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121 break;
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122 }
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123 }
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124
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125 return 0;
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126 }
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127
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128 static int
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129 _tview_lookup_ext_full(struct mail_index_view *view, uint32_t seq,
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130 uint32_t ext_id, struct mail_index_map **map_r,
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131 const void **data_r)
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132 {
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133 struct mail_index_view_transaction *tview =
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134 (struct mail_index_view_transaction *)view;
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135 const struct mail_index_ext *ext;
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136 buffer_t *const *ext_bufs;
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137 size_t size, pos;
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138
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139 i_assert(ext_id < view->index->extensions->used / sizeof(*ext));
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140
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141 ext = view->index->extensions->data;
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142 ext += ext_id;
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143
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144 if (tview->t->ext_rec_updates == NULL) {
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145 ext_bufs = NULL;
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146 size = 0;
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147 } else {
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148 ext_bufs = buffer_get_data(tview->t->ext_rec_updates, &size);
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149 size /= sizeof(*ext_bufs);
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150 }
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151
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152 *map_r = view->index->map;
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153 if (size <= ext_id || ext_bufs[ext_id] == NULL ||
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154 !mail_index_seq_buffer_lookup(ext_bufs[ext_id], seq,
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155 ext->record_size, &pos)) {
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156 /* not updated, return the existing value */
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157 if (seq < tview->t->first_new_seq) {
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158 return tview->parent->lookup_ext_full(view, seq, ext_id,
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159 map_r, data_r);
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160 }
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161
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162 *data_r = NULL;
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163 return 1;
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164 }
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165
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166 *data_r = CONST_PTR_OFFSET(ext_bufs[ext_id]->data, pos + sizeof(seq));
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167 return 1;
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168 }
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169
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170 static int _tview_get_header_ext(struct mail_index_view *view,
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171 struct mail_index_map *map, uint32_t ext_id,
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172 const void **data_r, size_t *data_size_r)
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173 {
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174 struct mail_index_view_transaction *tview =
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175 (struct mail_index_view_transaction *)view;
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176
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177 /* FIXME: check updates */
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178 return tview->parent->get_header_ext(view, map, ext_id,
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179 data_r, data_size_r);
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180 }
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181
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182 static struct mail_index_view_methods view_methods = {
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183 _tview_close,
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184 _tview_get_message_count,
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185 _tview_get_header,
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186 _tview_lookup_full,
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187 _tview_lookup_uid,
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188 _tview_lookup_uid_range,
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189 _tview_lookup_first,
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190 _tview_lookup_ext_full,
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191 _tview_get_header_ext
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192 };
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193
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194 struct mail_index_view *
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195 mail_index_transaction_open_updated_view(struct mail_index_transaction *t)
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196 {
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197 struct mail_index_view_transaction *tview;
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198
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199 if (t->view->syncing) {
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200 /* transaction view is being synced. while it's done, it's not
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201 possible to add new messages, but the view itself might
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202 change. so we can't make a copy of the view. */
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203 mail_index_view_ref(t->view);
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204 return t->view;
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205 }
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206
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207 tview = i_new(struct mail_index_view_transaction, 1);
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208 mail_index_view_clone(&tview->view, t->view);
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209 tview->view.methods = view_methods;
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210 tview->parent = &t->view->methods;
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211 tview->t = t;
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212
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213 mail_index_transaction_ref(t);
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214 return &tview->view;
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215 }