new file mode 100644
--- /dev/null
+++ b/src/core/ngx_parse.c
@@ -0,0 +1,212 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ */
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+
+
+ngx_int_t ngx_parse_size(ngx_str_t *line)
+{
+    u_char     last;
+    size_t     len;
+    ngx_int_t  scale, size;
+
+    len = line->len;
+    last = line->data[len - 1];
+
+    switch (last) {
+    case 'K':
+    case 'k':
+        len--;
+        scale = 1024;
+        break;
+
+    case 'M':
+    case 'm':
+        len--;
+        scale = 1024 * 1024;
+        break;
+
+    default:
+        scale = 1;
+    }
+
+    size = ngx_atoi(line->data, len);
+    if (size == NGX_ERROR) {
+        return NGX_ERROR;
+    }
+
+    size *= scale;
+
+    return size;
+}
+
+
+ngx_int_t ngx_parse_time(ngx_str_t *line, ngx_int_t sec)
+{
+    size_t      len;
+    u_char     *start, last;
+    ngx_int_t   value, total, scale;
+    ngx_uint_t  max, i;
+    enum {
+        st_start = 0,
+        st_year,
+        st_month,
+        st_week,
+        st_day,
+        st_hour,
+        st_min,
+        st_sec,
+        st_msec,
+        st_last
+    } step;
+
+
+    start = line->data;
+    len = 0;
+    total = 0;
+    step = sec ? st_start : st_month;
+
+    for (i = 0; /* void */ ; i++) {
+
+        if (i < line->len) {
+            if (line->data[i] != ' ') {
+                len++;
+                continue;
+            }
+
+            if (line->data[i] == ' ' && len == 0) {
+                start = &line->data[i + 1];
+                continue;
+            }
+        }
+
+        if (len == 0) {
+            break;
+        }
+
+        last = line->data[i - 1];
+
+        switch (last) {
+        case 'y':
+            if (step > st_start) {
+                return NGX_ERROR;
+            }
+            step = st_year;
+            len--;
+            max = 68;
+            scale = 60 * 60 * 24 * 365;
+            break;
+
+        case 'M':
+            if (step > st_year) {
+                return NGX_ERROR;
+            }
+            step = st_month;
+            len--;
+            max = 828;
+            scale = 60 * 60 * 24 * 30;
+            break;
+
+        case 'w':
+            if (step > st_month) {
+                return NGX_ERROR;
+            }
+            step = st_week;
+            len--;
+            max = 3550;
+            scale = 60 * 60 * 24 * 7;
+            break;
+
+        case 'd':
+            if (step > st_week) {
+                return NGX_ERROR;
+            }
+            step = st_day;
+            len--;
+            max = 24855;
+            scale = 60 * 60 * 24;
+            break;
+
+        case 'h':
+            if (step > st_day) {
+                return NGX_ERROR;
+            }
+            step = st_hour;
+            len--;
+            max = 596523;
+            scale = 60 * 60;
+            break;
+
+        case 'm':
+            if (step > st_hour) {
+                return NGX_ERROR;
+            }
+            step = st_min;
+            len--;
+            max = 35791394;
+            scale = 60;
+            break;
+
+        case 's':
+            len--;
+
+            if (line->data[i - 2] == 'm') {
+                if (sec || step > st_sec) {
+                    return NGX_ERROR;
+                }
+                step = st_msec;
+                len--;
+                max = 2147483647;
+                scale = 1;
+                break;
+            }
+
+            if (step > st_min) {
+                return NGX_ERROR;
+            }
+
+            step = st_sec;
+            max = 2147483647;
+            scale = 1;
+            break;
+
+        default:
+            step = st_last;
+            max = 2147483647;
+            scale = 1;
+        }
+
+        value = ngx_atoi(start, len);
+        if (value == NGX_ERROR) {
+            return NGX_ERROR;
+        }
+
+        if (step != st_msec && !sec) {
+            scale *= 1000;
+            max /= 1000;
+        }
+
+        if ((u_int) value > max) {
+            return NGX_PARSE_LARGE_TIME;
+        }
+
+        total += value * scale;
+
+        if ((u_int) total > 2147483647) {
+            return NGX_PARSE_LARGE_TIME;
+        }
+
+        if (i >= line->len) {
+            break;
+        }
+
+        len = 0;
+        start = &line->data[i + 1];
+    }
+
+    return total;
+}