diff options
Diffstat (limited to 'app/nginx/src/core/ngx_parse.c')
| -rw-r--r-- | app/nginx/src/core/ngx_parse.c | 283 |
1 files changed, 283 insertions, 0 deletions
diff --git a/app/nginx/src/core/ngx_parse.c b/app/nginx/src/core/ngx_parse.c new file mode 100644 index 0000000..d35e60f --- /dev/null +++ b/app/nginx/src/core/ngx_parse.c @@ -0,0 +1,283 @@ + +/* + * 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, scale, max; + + len = line->len; + + if (len == 0) { + return NGX_ERROR; + } + + unit = line->data[len - 1]; + + switch (unit) { + case 'K': + case 'k': + len--; + max = NGX_MAX_SIZE_T_VALUE / 1024; + scale = 1024; + break; + + case 'M': + case 'm': + len--; + max = NGX_MAX_SIZE_T_VALUE / (1024 * 1024); + scale = 1024 * 1024; + break; + + default: + max = NGX_MAX_SIZE_T_VALUE; + scale = 1; + } + + size = ngx_atosz(line->data, len); + if (size == NGX_ERROR || size > max) { + return NGX_ERROR; + } + + size *= scale; + + return size; +} + + +off_t +ngx_parse_offset(ngx_str_t *line) +{ + u_char unit; + off_t offset, scale, max; + size_t len; + + len = line->len; + + if (len == 0) { + return NGX_ERROR; + } + + unit = line->data[len - 1]; + + switch (unit) { + case 'K': + case 'k': + len--; + max = NGX_MAX_OFF_T_VALUE / 1024; + scale = 1024; + break; + + case 'M': + case 'm': + len--; + max = NGX_MAX_OFF_T_VALUE / (1024 * 1024); + scale = 1024 * 1024; + break; + + case 'G': + case 'g': + len--; + max = NGX_MAX_OFF_T_VALUE / (1024 * 1024 * 1024); + scale = 1024 * 1024 * 1024; + break; + + default: + max = NGX_MAX_OFF_T_VALUE; + scale = 1; + } + + offset = ngx_atoof(line->data, len); + if (offset == NGX_ERROR || offset > max) { + 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_int_t max, cutoff, cutlim; + ngx_uint_t 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; + cutoff = NGX_MAX_INT_T_VALUE / 10; + cutlim = NGX_MAX_INT_T_VALUE % 10; + step = is_sec ? st_start : st_month; + + p = line->data; + last = p + line->len; + + while (p < last) { + + if (*p >= '0' && *p <= '9') { + if (value >= cutoff && (value > cutoff || *p - '0' > cutlim)) { + return NGX_ERROR; + } + + 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_INT_T_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_INT_T_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_INT_T_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_INT_T_VALUE / (60 * 60 * 24); + scale = 60 * 60 * 24; + break; + + case 'h': + if (step >= st_hour) { + return NGX_ERROR; + } + step = st_hour; + max = NGX_MAX_INT_T_VALUE / (60 * 60); + scale = 60 * 60; + break; + + case 'm': + if (p < last && *p == 's') { + if (is_sec || step >= st_msec) { + return NGX_ERROR; + } + p++; + step = st_msec; + max = NGX_MAX_INT_T_VALUE; + scale = 1; + break; + } + + if (step >= st_min) { + return NGX_ERROR; + } + step = st_min; + max = NGX_MAX_INT_T_VALUE / 60; + scale = 60; + break; + + case 's': + if (step >= st_sec) { + return NGX_ERROR; + } + step = st_sec; + max = NGX_MAX_INT_T_VALUE; + scale = 1; + break; + + case ' ': + if (step >= st_sec) { + return NGX_ERROR; + } + step = st_last; + max = NGX_MAX_INT_T_VALUE; + scale = 1; + break; + + default: + return NGX_ERROR; + } + + if (step != st_msec && !is_sec) { + scale *= 1000; + max /= 1000; + } + + if (value > max) { + return NGX_ERROR; + } + + value *= scale; + + if (total > NGX_MAX_INT_T_VALUE - value) { + return NGX_ERROR; + } + + total += value; + + value = 0; + + while (p < last && *p == ' ') { + p++; + } + } + + if (!valid) { + return NGX_ERROR; + } + + if (!is_sec) { + if (value > NGX_MAX_INT_T_VALUE / 1000) { + return NGX_ERROR; + } + + value *= 1000; + } + + if (total > NGX_MAX_INT_T_VALUE - value) { + return NGX_ERROR; + } + + return total + value; +} |