Mercurial > dovecot > original-hg > dovecot-1.2

annotate src/lib-mail/message-size.c @ 956:26cafa3dc09c HEAD

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minor optimization
author Timo Sirainen <tss@iki.fi>
date Sun, 12 Jan 2003 01:49:45 +0200
parents fd8888f6f037
children e0dbaabbc22b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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 "istream.h"
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5 #include "message-parser.h"
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6 #include "message-size.h"
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7
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8 void message_get_header_size(struct istream *input, struct message_size *hdr)
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9 {
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10 const unsigned char *msg;
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11 size_t i, size, startpos, missing_cr_count;
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12
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13 memset(hdr, 0, sizeof(struct message_size));
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14
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15 missing_cr_count = 0; startpos = 0;
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16 while (i_stream_read_data(input, &msg, &size, startpos) > 0) {
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17 for (i = startpos; i < size; i++) {
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18 if (msg[i] != '\n')
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19 continue;
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20
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21 hdr->lines++;
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22 if (i == 0 || msg[i-1] != '\r') {
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23 /* missing CR */
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24 missing_cr_count++;
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25 }
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27 if (i == 0 || (i == 1 && msg[i-1] == '\r')) {
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28 /* no headers at all */
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29 break;
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30 }
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31
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32 if ((i > 0 && msg[i-1] == '\n') ||
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33 (i > 1 && msg[i-2] == '\n' && msg[i-1] == '\r')) {
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34 /* \n\n or \n\r\n - end of headers */
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35 break;
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36 }
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37 }
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38
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39 if (i < size) {
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40 /* end of header */
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41 startpos = i+1;
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42 break;
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43 }
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44
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45 /* leave the last two characters, they may be \r\n */
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46 startpos = size == 1 ? 1 : 2;
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47 i_stream_skip(input, i - startpos);
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48
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49 hdr->physical_size += i - startpos;
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50 }
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51 i_stream_skip(input, startpos);
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52 hdr->physical_size += startpos;
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53
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54 hdr->virtual_size = hdr->physical_size + missing_cr_count;
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55 i_assert(hdr->virtual_size >= hdr->physical_size);
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56 }
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57
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58 void message_get_body_size(struct istream *input, struct message_size *body,
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59 uoff_t max_virtual_size, int *last_cr)
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60 {
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61 const unsigned char *msg;
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62 size_t i, size, startpos, missing_cr_count;
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63 int cr;
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64
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65 memset(body, 0, sizeof(struct message_size));
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66
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67 cr = 0;
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68 missing_cr_count = 0; startpos = 0;
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69 while (max_virtual_size != 0 &&
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70 i_stream_read_data(input, &msg, &size, startpos) > 0) {
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71 cr = 0;
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72 for (i = startpos; i < size && max_virtual_size > 0; i++) {
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73 max_virtual_size--;
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74
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75 if (msg[i] == '\n') {
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76 if (i == 0 || msg[i-1] != '\r') {
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77 /* missing CR */
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78 missing_cr_count++;
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79
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80 if (max_virtual_size == 0) {
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81 cr = 2;
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82 break;
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83 }
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84
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85 max_virtual_size--;
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86 }
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87
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88 /* increase after making sure we didn't break
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89 at virtual \r */
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90 body->lines++;
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91 }
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92 }
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93
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94 if (cr == 0 && i > 0 && msg[i-1] == '\r')
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95 cr = 1;
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96
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97 /* leave the last character, it may be \r */
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98 i_stream_skip(input, i - 1);
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99 startpos = 1;
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100
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101 body->physical_size += i - 1;
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102 }
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103 i_stream_skip(input, startpos);
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104 body->physical_size += startpos;
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105
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106 body->virtual_size = body->physical_size + missing_cr_count;
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107 i_assert(body->virtual_size >= body->physical_size);
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108
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109 if (last_cr != NULL)
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110 *last_cr = cr;
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111 }
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112
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113 void message_skip_virtual(struct istream *input, uoff_t virtual_skip,
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114 struct message_size *msg_size, int *cr_skipped)
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115 {
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116 const unsigned char *msg;
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117 size_t i, size, startpos;
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118
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119 *cr_skipped = FALSE;
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120 if (virtual_skip == 0)
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121 return;
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122
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123 startpos = 0;
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124 while (i_stream_read_data(input, &msg, &size, startpos) > 0) {
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125 for (i = startpos; i < size && virtual_skip > 0; i++) {
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126 virtual_skip--;
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127
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128 if (msg[i] == '\r') {
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129 /* CR */
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130 if (virtual_skip == 0)
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131 *cr_skipped = TRUE;
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132 } else if (msg[i] == '\n') {
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133 /* LF */
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134 if (i == 0 || msg[i-1] != '\r') {
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135 /* missing CR */
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136 if (msg_size != NULL)
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137 msg_size->virtual_size++;
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138
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139 if (virtual_skip == 0) {
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140 /* CR/LF boundary */
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141 *cr_skipped = TRUE;
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142 break;
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143 }
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144
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145 virtual_skip--;
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146 }
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147
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148 /* increase after making sure we didn't break
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149 at virtual \r */
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150 if (msg_size != NULL)
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151 msg_size->lines++;
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152 }
0
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153 }
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154
5
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155 if (msg_size != NULL) {
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156 msg_size->physical_size += i;
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157 msg_size->virtual_size += i;
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158 }
0
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159
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160 if (i < size) {
764
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161 i_stream_skip(input, i);
5
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162 break;
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163 }
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164
232
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165 /* leave the last character, it may be \r */
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166 i_stream_skip(input, i - 1);
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167 startpos = 1;
5
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168 }
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169 }
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170
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171 void message_size_add(struct message_size *dest,
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172 const struct message_size *src)
0
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173 {
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174 dest->virtual_size += src->virtual_size;
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175 dest->physical_size += src->physical_size;
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176 dest->lines += src->lines;
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177 }