1
2 /*
3 * Copyright (C) Igor Sysoev
4 */
5
6
7 #include <ngx_config.h>
8 #include <ngx_core.h>
9
10
11 ssize_t
12 ngx_parse_size(ngx_str_t *line)
13 {
14 u_char last;
15 size_t len;
16 ssize_t size;
17 ngx_int_t scale;
18
19 len = line->len;
20 last = line->data[len - 1];
21
22 switch (last) {
23 case 'K':
24 case 'k':
25 len--;
26 scale = 1024;
27 break;
28
29 case 'M':
30 case 'm':
31 len--;
32 scale = 1024 * 1024;
33 break;
34
35 default:
36 scale = 1;
37 }
38
39 size = ngx_atosz(line->data, len);
40 if (size == NGX_ERROR) {
41 return NGX_ERROR;
42 }
43
44 size *= scale;
45
46 return size;
47 }
48
49
50 off_t
51 ngx_parse_offset(ngx_str_t *line)
52 {
53 u_char last;
54 off_t offset;
55 size_t len;
56 ngx_int_t scale;
57
58 len = line->len;
59 last = line->data[len - 1];
60
61 switch (last) {
62 case 'K':
63 case 'k':
64 len--;
65 scale = 1024;
66 break;
67
68 case 'M':
69 case 'm':
70 len--;
71 scale = 1024 * 1024;
72 break;
73
74 case 'G':
75 case 'g':
76 len--;
77 scale = 1024 * 1024 * 1024;
78 break;
79
80 default:
81 scale = 1;
82 }
83
84 offset = ngx_atoof(line->data, len);
85 if (offset == NGX_ERROR) {
86 return NGX_ERROR;
87 }
88
89 offset *= scale;
90
91 return offset;
92 }
93
94
95 ngx_int_t
96 ngx_parse_time(ngx_str_t *line, ngx_int_t sec)
97 {
98 size_t len;
99 u_char *start, last;
100 ngx_int_t value, total, scale;
101 ngx_uint_t max, i;
102 enum {
103 st_start = 0,
104 st_year,
105 st_month,
106 st_week,
107 st_day,
108 st_hour,
109 st_min,
110 st_sec,
111 st_msec,
112 st_last
113 } step;
114
115
116 start = line->data;
117 len = 0;
118 total = 0;
119 step = sec ? st_start : st_month;
120
121 for (i = 0; /* void */ ; i++) {
122
123 if (i < line->len) {
124 if (line->data[i] != ' ') {
125 len++;
126 continue;
127 }
128
129 if (line->data[i] == ' ' && len == 0) {
130 start = &line->data[i + 1];
131 continue;
132 }
133 }
134
135 if (len == 0) {
136 break;
137 }
138
139 last = line->data[i - 1];
140
141 switch (last) {
142 case 'y':
143 if (step > st_start) {
144 return NGX_ERROR;
145 }
146 step = st_year;
147 len--;
148 max = 68;
149 scale = 60 * 60 * 24 * 365;
150 break;
151
152 case 'M':
153 if (step > st_year) {
154 return NGX_ERROR;
155 }
156 step = st_month;
157 len--;
158 max = 828;
159 scale = 60 * 60 * 24 * 30;
160 break;
161
162 case 'w':
163 if (step > st_month) {
164 return NGX_ERROR;
165 }
166 step = st_week;
167 len--;
168 max = 3550;
169 scale = 60 * 60 * 24 * 7;
170 break;
171
172 case 'd':
173 if (step > st_week) {
174 return NGX_ERROR;
175 }
176 step = st_day;
177 len--;
178 max = 24855;
179 scale = 60 * 60 * 24;
180 break;
181
182 case 'h':
183 if (step > st_day) {
184 return NGX_ERROR;
185 }
186 step = st_hour;
187 len--;
188 max = 596523;
189 scale = 60 * 60;
190 break;
191
192 case 'm':
193 if (step > st_hour) {
194 return NGX_ERROR;
195 }
196 step = st_min;
197 len--;
198 max = 35791394;
199 scale = 60;
200 break;
201
202 case 's':
203 len--;
204
205 if (line->data[i - 2] == 'm') {
206 if (sec || step > st_sec) {
207 return NGX_ERROR;
208 }
209 step = st_msec;
210 len--;
211 max = 2147483647;
212 scale = 1;
213 break;
214 }
215
216 if (step > st_min) {
217 return NGX_ERROR;
218 }
219
220 step = st_sec;
221 max = 2147483647;
222 scale = 1;
223 break;
224
225 default:
226 step = st_last;
227 max = 2147483647;
228 scale = 1;
229 }
230
231 value = ngx_atoi(start, len);
232 if (value == NGX_ERROR) {
233 return NGX_ERROR;
234 }
235
236 if (step != st_msec && !sec) {
237 scale *= 1000;
238 max /= 1000;
239 }
240
241 if ((u_int) value > max) {
242 return NGX_PARSE_LARGE_TIME;
243 }
244
245 total += value * scale;
246
247 if ((u_int) total > 2147483647) {
248 return NGX_PARSE_LARGE_TIME;
249 }
250
251 if (i >= line->len) {
252 break;
253 }
254
255 len = 0;
256 start = &line->data[i + 1];
257 }
258
259 return total;
260 }
261
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