Mercurial > dovecot > original-hg > dovecot-1.2

annotate src/lib-index/mbox/mbox-append.c @ 184:4223b9ed0c80 HEAD

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move size_t fixes
author Timo Sirainen <tss@iki.fi>
date Sun, 08 Sep 2002 17:39:05 +0300
parents 38341ad6a9db
children 95d21ab87eeb
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /* Copyright (C) 2002 Timo Sirainen */
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2
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3 #include "lib.h"
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4 #include "ioloop.h"
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5 #include "iobuffer.h"
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6 #include "hex-binary.h"
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7 #include "md5.h"
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8 #include "mbox-index.h"
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9 #include "mail-index-util.h"
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10
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11 static MailIndexRecord *mail_index_record_append(MailIndex *index,
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12 time_t internal_date)
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13 {
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14 MailIndexRecord trec, *rec;
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15
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16 memset(&trec, 0, sizeof(MailIndexRecord));
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17 trec.internal_date = internal_date;
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18
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19 rec = &trec;
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20 if (!index->append(index, &rec))
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21 return NULL;
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22
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23 return rec;
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24 }
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25
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26 static void mbox_read_message(IOBuffer *inbuf)
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27 {
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28 unsigned char *msg;
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29 size_t i, size, startpos;
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30 int lastmsg;
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31
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32 /* read until "[\r]\nFrom " is found */
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33 startpos = i = 0; lastmsg = TRUE;
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34 while (io_buffer_read_data(inbuf, &msg, &size, startpos) >= 0) {
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35 for (i = startpos; i < size; i++) {
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36 if (msg[i] == ' ' && i >= 5) {
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37 /* See if it's space after "From" */
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38 if (msg[i-5] == '\n' && msg[i-4] == 'F' &&
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39 msg[i-3] == 'r' && msg[i-2] == 'o' &&
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40 msg[i-1] == 'm') {
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41 /* yes, see if we had \r too */
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42 i -= 5;
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43 if (i > 0 && msg[i-1] == '\r')
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44 i--;
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45 break;
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46 }
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47 }
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48 }
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49
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50 if (i < size) {
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51 startpos = i;
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52 lastmsg = FALSE;
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53 break;
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54 }
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55
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56 if (i > 0) {
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57 startpos = i < 7 ? i : 7;
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58 i -= startpos;
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59
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60 io_buffer_skip(inbuf, i);
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61 }
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62 }
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63
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64 if (lastmsg && startpos > 0) {
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65 /* end of file, remove the last [\r]\n */
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66 msg = io_buffer_get_data(inbuf, &size);
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67 if (size == startpos) {
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68 if (msg[startpos-1] == '\n')
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69 startpos--;
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70 if (startpos > 0 && msg[startpos-1] == '\r')
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71 startpos--;
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72 }
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73 }
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74
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75 io_buffer_skip(inbuf, startpos);
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76 }
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77
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78 static int mbox_index_append_next(MailIndex *index, IOBuffer *inbuf)
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79 {
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80 MailIndexRecord *rec;
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81 MailIndexUpdate *update;
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82 MboxHeaderContext ctx;
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83 time_t internal_date;
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84 uoff_t abs_start_offset, stop_offset, old_size;
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85 unsigned char *data, md5_digest[16];
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86 size_t size, pos;
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87
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88 /* get the From-line */
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89 pos = 0;
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90 while (io_buffer_read_data(inbuf, &data, &size, pos) >= 0) {
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91 for (; pos < size; pos++) {
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92 if (data[pos] == '\n')
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93 break;
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94 }
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95
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96 if (pos < size)
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97 break;
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98 }
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99
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100 if (pos == size || size <= 5 || strncmp(data, "From ", 5) != 0) {
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101 /* a) no \n found, or line too long
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102 b) not a From-line */
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103 index_set_error(index, "Error indexing mbox file %s: "
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104 "From-line not found where expected",
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105 index->mbox_path);
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106 index->set_flags |= MAIL_INDEX_FLAG_FSCK;
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107 return FALSE;
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108 }
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109
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110 /* parse the From-line */
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111 internal_date = mbox_from_parse_date(data, size);
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112 if (internal_date <= 0)
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113 internal_date = ioloop_time;
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114
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115 io_buffer_skip(inbuf, pos+1);
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116 abs_start_offset = inbuf->start_offset + inbuf->offset;
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117
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118 /* now, find the ending "[\r]\nFrom " */
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119 mbox_read_message(inbuf);
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120 stop_offset = inbuf->offset;
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121
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122 /* add message to index */
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123 rec = mail_index_record_append(index, internal_date);
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124 if (rec == NULL)
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125 return FALSE;
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126
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127 update = index->update_begin(index, rec);
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128
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129 /* location = offset to beginning of headers in message */
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130 index->update_field_raw(update, FIELD_TYPE_LOCATION,
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131 &abs_start_offset, sizeof(uoff_t));
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132
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133 /* parse the header and cache wanted fields. get the message flags
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134 from Status and X-Status fields. temporarily limit the buffer size
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135 so the message body is parsed properly (FIXME: does this have
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136 side effects?) */
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137 mbox_header_init_context(&ctx, index);
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138
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139 old_size = inbuf->size;
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140 inbuf->size = stop_offset;
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141 io_buffer_seek(inbuf, abs_start_offset - inbuf->start_offset);
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142
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143 mail_index_update_headers(update, inbuf, 0, mbox_header_func, &ctx);
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144
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145 inbuf->size = old_size;
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146 io_buffer_seek(inbuf, stop_offset);
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147
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148 /* save MD5 */
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149 md5_final(&ctx.md5, md5_digest);
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150 index->update_field_raw(update, FIELD_TYPE_MD5,
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151 md5_digest, sizeof(md5_digest));
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152
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153 if (!index->update_end(update)) {
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154 /* failed - delete the record */
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155 (void)index->expunge(index, rec, 0, FALSE);
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156 return FALSE;
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157 }
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158
160
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159 /* save message flags */
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160 rec->msg_flags = ctx.flags;
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161 mail_index_mark_flag_changes(index, rec, 0, rec->msg_flags);
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162
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163 return TRUE;
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164 }
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165
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166 int mbox_index_append(MailIndex *index, IOBuffer *inbuf)
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167 {
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168 if (inbuf->offset == inbuf->size) {
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169 /* no new data */
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170 return TRUE;
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171 }
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172
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173 if (!index->set_lock(index, MAIL_LOCK_EXCLUSIVE))
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174 return FALSE;
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175
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176 for (;;) {
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177 if (inbuf->start_offset + inbuf->offset != 0) {
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178 /* we're at the [\r]\n before the From-line,
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179 skip it */
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180 if (!mbox_skip_crlf(inbuf)) {
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181 index_set_error(index,
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182 "Error indexing mbox file %s: "
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183 "LF not found where expected",
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184 index->mbox_path);
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185
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186 index->set_flags |= MAIL_INDEX_FLAG_FSCK;
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187 return FALSE;
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188 }
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189 }
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190
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191 if (inbuf->offset == inbuf->size)
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192 break;
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193
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194 if (!mbox_index_append_next(index, inbuf))
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195 return FALSE;
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196 }
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197
22
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198 return TRUE;
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199 }