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src/core/ngx_parse.c - nginx-1.7.10
Functions defined
Source code
- #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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