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