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/*
* Copyright (C) Igor Sysoev
* Copyright (C) Nginx, Inc.
*/
#include <ngx_config.h>
#include <ngx_core.h>
ssize_t
ngx_parse_size(ngx_str_t *line)
{
u_char unit;
size_t len;
ssize_t size;
ngx_int_t scale;
len = line->len;
unit = line->data[len - 1];
switch (unit) {
case 'K':
case 'k':
len--;
scale = 1024;
break;
case 'M':
case 'm':
len--;
scale = 1024 * 1024;
break;
default:
scale = 1;
}
size = ngx_atosz(line->data, len);
if (size == NGX_ERROR) {
return NGX_ERROR;
}
size *= scale;
return size;
}
off_t
ngx_parse_offset(ngx_str_t *line)
{
u_char unit;
off_t offset;
size_t len;
ngx_int_t scale;
len = line->len;
unit = line->data[len - 1];
switch (unit) {
case 'K':
case 'k':
len--;
scale = 1024;
break;
case 'M':
case 'm':
len--;
scale = 1024 * 1024;
break;
case 'G':
case 'g':
len--;
scale = 1024 * 1024 * 1024;
break;
default:
scale = 1;
}
offset = ngx_atoof(line->data, len);
if (offset == NGX_ERROR) {
return NGX_ERROR;
}
offset *= scale;
return offset;
}
ngx_int_t
ngx_parse_time(ngx_str_t *line, ngx_uint_t is_sec)
{
u_char *p, *last;
ngx_int_t value, total, scale;
ngx_uint_t max, valid;
enum {
st_start = 0,
st_year,
st_month,
st_week,
st_day,
st_hour,
st_min,
st_sec,
st_msec,
st_last
} step;
valid = 0;
value = 0;
total = 0;
step = is_sec ? st_start : st_month;
scale = is_sec ? 1 : 1000;
p = line->data;
last = p + line->len;
while (p < last) {
if (*p >= '0' && *p <= '9') {
value = value * 10 + (*p++ - '0');
valid = 1;
continue;
}
switch (*p++) {
case 'y':
if (step > st_start) {
return NGX_ERROR;
}
step = st_year;
max = NGX_MAX_INT32_VALUE / (60 * 60 * 24 * 365);
scale = 60 * 60 * 24 * 365;
break;
case 'M':
if (step >= st_month) {
return NGX_ERROR;
}
step = st_month;
max = NGX_MAX_INT32_VALUE / (60 * 60 * 24 * 30);
scale = 60 * 60 * 24 * 30;
break;
case 'w':
if (step >= st_week) {
return NGX_ERROR;
}
step = st_week;
max = NGX_MAX_INT32_VALUE / (60 * 60 * 24 * 7);
scale = 60 * 60 * 24 * 7;
break;
case 'd':
if (step >= st_day) {
return NGX_ERROR;
}
step = st_day;
max = NGX_MAX_INT32_VALUE / (60 * 60 * 24);
scale = 60 * 60 * 24;
break;
case 'h':
if (step >= st_hour) {
return NGX_ERROR;
}
step = st_hour;
max = NGX_MAX_INT32_VALUE / (60 * 60);
scale = 60 * 60;
break;
case 'm':
if (*p == 's') {
if (is_sec || step >= st_msec) {
return NGX_ERROR;
}
p++;
step = st_msec;
max = NGX_MAX_INT32_VALUE;
scale = 1;
break;
}
if (step >= st_min) {
return NGX_ERROR;
}
step = st_min;
max = NGX_MAX_INT32_VALUE / 60;
scale = 60;
break;
case 's':
if (step >= st_sec) {
return NGX_ERROR;
}
step = st_sec;
max = NGX_MAX_INT32_VALUE;
scale = 1;
break;
case ' ':
if (step >= st_sec) {
return NGX_ERROR;
}
step = st_last;
max = NGX_MAX_INT32_VALUE;
scale = 1;
break;
default:
return NGX_ERROR;
}
if (step != st_msec && !is_sec) {
scale *= 1000;
max /= 1000;
}
if ((ngx_uint_t) value > max) {
return NGX_ERROR;
}
total += value * scale;
if ((ngx_uint_t) total > NGX_MAX_INT32_VALUE) {
return NGX_ERROR;
}
value = 0;
scale = is_sec ? 1 : 1000;
while (p < last && *p == ' ') {
p++;
}
}
if (valid) {
return total + value * scale;
}
return NGX_ERROR;
}
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