Mercurial > dovecot > original-hg > dovecot-1.2
annotate src/lib-index/mail-index-transaction-view.c @ 2224:a816e2d88406 HEAD
Added mail_index_transaction_get_updated_view() which can be used to access
uncommitted messages.
author | Timo Sirainen <tss@iki.fi> |
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date | Tue, 22 Jun 2004 10:36:33 +0300 |
parents | |
children | 51719889ffcf |
rev | line source |
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2224
a816e2d88406
Added mail_index_transaction_get_updated_view() which can be used to access
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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 tview->t->updated_view = NULL; |
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21 |
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22 return tview->parent->close(view); |
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23 } |
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24 |
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25 static uint32_t _tview_get_message_count(struct mail_index_view *view) |
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26 { |
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27 struct mail_index_view_transaction *tview = |
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28 (struct mail_index_view_transaction *)view; |
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29 |
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30 return view->messages_count + |
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31 (tview->t->last_new_seq == 0 ? 0 : |
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32 tview->t->last_new_seq - tview->t->first_new_seq); |
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33 } |
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34 |
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35 static int _tview_get_header(struct mail_index_view *view, |
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36 const struct mail_index_header **hdr_r) |
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37 { |
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38 struct mail_index_view_transaction *tview = |
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39 (struct mail_index_view_transaction *)view; |
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40 |
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41 if (tview->parent->get_header(view, hdr_r) < 0) |
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42 return -1; |
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43 |
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44 if ((*hdr_r)->messages_count != view->messages_count) { |
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45 /* messages_count differs, use a modified copy. |
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46 FIXME: same problems as with _view_get_header().. */ |
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47 view->tmp_hdr_copy = **hdr_r; |
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48 view->tmp_hdr_copy.messages_count = view->messages_count; |
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49 *hdr_r = &view->tmp_hdr_copy; |
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50 } |
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51 return 0; |
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52 } |
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53 |
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54 static int _tview_lookup_full(struct mail_index_view *view, uint32_t seq, |
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55 struct mail_index_map **map_r, |
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56 const struct mail_index_record **rec_r) |
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57 { |
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58 struct mail_index_view_transaction *tview = |
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59 (struct mail_index_view_transaction *)view; |
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60 |
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61 if (seq >= tview->t->first_new_seq) { |
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62 /* FIXME: is this right to return index map..? |
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63 it's not there yet. */ |
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64 *map_r = view->index->map; |
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65 *rec_r = mail_index_transaction_lookup(tview->t, seq); |
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66 return 1; |
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67 } else { |
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68 return tview->parent->lookup_full(view, seq, map_r, rec_r); |
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69 } |
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70 } |
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71 |
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72 static int _tview_lookup_uid(struct mail_index_view *view, uint32_t seq, |
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73 uint32_t *uid_r) |
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74 { |
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75 struct mail_index_view_transaction *tview = |
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76 (struct mail_index_view_transaction *)view; |
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77 |
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78 if (seq >= tview->t->first_new_seq) { |
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79 *uid_r = mail_index_transaction_lookup(tview->t, seq)->uid; |
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80 return 0; |
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81 } else { |
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82 return tview->parent->lookup_uid(view, seq, uid_r); |
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83 } |
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84 } |
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85 |
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86 static int _tview_lookup_uid_range(struct mail_index_view *view, |
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87 uint32_t first_uid, uint32_t last_uid, |
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88 uint32_t *first_seq_r, uint32_t *last_seq_r) |
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89 { |
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90 struct mail_index_view_transaction *tview = |
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91 (struct mail_index_view_transaction *)view; |
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92 |
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93 if (tview->parent->lookup_uid_range(view, first_uid, last_uid, |
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94 first_seq_r, last_seq_r) < 0) |
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95 return -1; |
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96 |
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97 /* FIXME: we don't need this function yet.. new UIDs might be 0 as |
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98 well.. */ |
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99 |
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100 if (*first_seq_r == 0) { |
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101 /* nothing found, either doesn't exist or it's completely |
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102 newly appended. */ |
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103 } else if (*last_seq_r + 1 == tview->t->first_new_seq) { |
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104 /* last_seq_r may be growed from transactions */ |
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105 } |
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106 |
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107 return 0; |
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108 } |
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109 |
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110 static int _tview_lookup_first(struct mail_index_view *view, |
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111 enum mail_flags flags, uint8_t flags_mask, |
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112 uint32_t *seq_r) |
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113 { |
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114 struct mail_index_view_transaction *tview = |
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115 (struct mail_index_view_transaction *)view; |
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116 const struct mail_index_record *rec; |
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117 uint32_t seq, message_count; |
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118 |
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119 if (tview->parent->lookup_first(view, flags, flags_mask, seq_r) < 0) |
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120 return -1; |
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121 |
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122 if (*seq_r != 0) |
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123 return 0; |
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124 |
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125 rec = buffer_get_data(tview->t->appends, NULL); |
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126 seq = tview->t->first_new_seq; |
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127 message_count = tview->t->last_new_seq; |
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128 for (; seq <= message_count; seq++) { |
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129 if ((rec->flags & flags_mask) == (uint8_t)flags) { |
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130 *seq_r = seq; |
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131 break; |
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132 } |
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133 rec = CONST_PTR_OFFSET(rec, view->index->record_size); |
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134 } |
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135 |
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136 return 0; |
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137 } |
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138 |
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139 static struct mail_index_view_methods view_methods = { |
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140 _tview_close, |
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141 _tview_get_message_count, |
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142 _tview_get_header, |
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143 _tview_lookup_full, |
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144 _tview_lookup_uid, |
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145 _tview_lookup_uid_range, |
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146 _tview_lookup_first |
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147 }; |
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148 |
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149 struct mail_index_view * |
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150 mail_index_transaction_get_updated_view(struct mail_index_transaction *t) |
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151 { |
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152 struct mail_index_view_transaction *tview; |
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153 |
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154 if (t->updated_view == NULL) { |
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155 tview = i_new(struct mail_index_view_transaction, 1); |
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156 mail_index_view_clone(&tview->view, t->view); |
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157 tview->view.methods = view_methods; |
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158 tview->parent = &t->view->methods; |
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159 tview->t = t; |
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160 |
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161 t->updated_view = &tview->view; |
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162 } |
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163 |
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164 return t->updated_view; |
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165 } |