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0
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9
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10
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112
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11 ssize_t
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12 ngx_parse_size(ngx_str_t *line)
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0
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13 {
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14 u_char last;
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15 size_t len;
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112
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16 ssize_t size;
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17 ngx_int_t scale;
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0
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18
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19 len = line->len;
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20 last = line->data[len - 1];
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21
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22 switch (last) {
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23 case 'K':
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24 case 'k':
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25 len--;
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26 scale = 1024;
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27 break;
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28
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29 case 'M':
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30 case 'm':
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31 len--;
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32 scale = 1024 * 1024;
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33 break;
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34
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35 default:
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36 scale = 1;
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37 }
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38
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112
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39 size = ngx_atosz(line->data, len);
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0
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40 if (size == NGX_ERROR) {
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41 return NGX_ERROR;
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42 }
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43
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44 size *= scale;
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45
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46 return size;
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47 }
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48
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49
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212
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50 off_t
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51 ngx_parse_offset(ngx_str_t *line)
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52 {
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53 u_char last;
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54 off_t offset;
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55 size_t len;
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56 ngx_int_t scale;
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57
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58 len = line->len;
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59 last = line->data[len - 1];
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60
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61 switch (last) {
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62 case 'K':
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63 case 'k':
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64 len--;
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65 scale = 1024;
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66 break;
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67
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68 case 'M':
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69 case 'm':
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70 len--;
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71 scale = 1024 * 1024;
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72 break;
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73
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74 case 'G':
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75 case 'g':
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76 len--;
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77 scale = 1024 * 1024 * 1024;
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78 break;
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79
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80 default:
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81 scale = 1;
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82 }
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83
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84 offset = ngx_atoof(line->data, len);
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85 if (offset == NGX_ERROR) {
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86 return NGX_ERROR;
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87 }
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88
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89 offset *= scale;
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90
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91 return offset;
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92 }
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93
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94
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112
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95 ngx_int_t
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96 ngx_parse_time(ngx_str_t *line, ngx_int_t sec)
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0
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97 {
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200
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98 size_t len;
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99 u_char *start, last;
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100 ngx_int_t value, total, scale;
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101 ngx_uint_t max, i;
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0
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102 enum {
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103 st_start = 0,
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104 st_year,
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105 st_month,
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106 st_week,
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107 st_day,
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108 st_hour,
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109 st_min,
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110 st_sec,
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111 st_msec,
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112 st_last
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113 } step;
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114
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115
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116 start = line->data;
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117 len = 0;
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118 total = 0;
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119 step = sec ? st_start : st_month;
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120
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121 for (i = 0; /* void */ ; i++) {
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122
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123 if (i < line->len) {
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124 if (line->data[i] != ' ') {
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125 len++;
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126 continue;
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127 }
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128
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129 if (line->data[i] == ' ' && len == 0) {
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130 start = &line->data[i + 1];
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131 continue;
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132 }
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133 }
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134
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135 if (len == 0) {
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136 break;
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137 }
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138
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139 last = line->data[i - 1];
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140
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141 switch (last) {
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142 case 'y':
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143 if (step > st_start) {
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144 return NGX_ERROR;
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145 }
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146 step = st_year;
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147 len--;
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148 max = 68;
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149 scale = 60 * 60 * 24 * 365;
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150 break;
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151
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152 case 'M':
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153 if (step > st_year) {
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154 return NGX_ERROR;
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155 }
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156 step = st_month;
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157 len--;
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158 max = 828;
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159 scale = 60 * 60 * 24 * 30;
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160 break;
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161
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162 case 'w':
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163 if (step > st_month) {
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164 return NGX_ERROR;
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165 }
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166 step = st_week;
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167 len--;
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168 max = 3550;
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169 scale = 60 * 60 * 24 * 7;
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170 break;
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171
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172 case 'd':
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173 if (step > st_week) {
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174 return NGX_ERROR;
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175 }
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176 step = st_day;
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177 len--;
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178 max = 24855;
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179 scale = 60 * 60 * 24;
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180 break;
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181
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182 case 'h':
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183 if (step > st_day) {
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184 return NGX_ERROR;
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185 }
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186 step = st_hour;
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187 len--;
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188 max = 596523;
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189 scale = 60 * 60;
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190 break;
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191
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192 case 'm':
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193 if (step > st_hour) {
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194 return NGX_ERROR;
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195 }
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196 step = st_min;
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197 len--;
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198 max = 35791394;
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199 scale = 60;
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200 break;
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201
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202 case 's':
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203 len--;
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204
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205 if (line->data[i - 2] == 'm') {
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206 if (sec || step > st_sec) {
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207 return NGX_ERROR;
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208 }
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209 step = st_msec;
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210 len--;
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211 max = 2147483647;
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212 scale = 1;
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213 break;
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214 }
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215
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216 if (step > st_min) {
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217 return NGX_ERROR;
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218 }
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219
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220 step = st_sec;
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221 max = 2147483647;
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222 scale = 1;
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223 break;
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224
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225 default:
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226 step = st_last;
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227 max = 2147483647;
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228 scale = 1;
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229 }
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230
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231 value = ngx_atoi(start, len);
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232 if (value == NGX_ERROR) {
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233 return NGX_ERROR;
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234 }
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235
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236 if (step != st_msec && !sec) {
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237 scale *= 1000;
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238 max /= 1000;
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239 }
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240
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241 if ((u_int) value > max) {
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242 return NGX_PARSE_LARGE_TIME;
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243 }
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244
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245 total += value * scale;
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246
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247 if ((u_int) total > 2147483647) {
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248 return NGX_PARSE_LARGE_TIME;
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249 }
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250
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251 if (i >= line->len) {
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252 break;
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253 }
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254
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255 len = 0;
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256 start = &line->data[i + 1];
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257 }
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258
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259 return total;
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260 }
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