[nginx] Core: expose maximum values of time_t and ngx_int_t.

[Maxim Dounin]

details:   http://hg.nginx.org/nginx/rev/51d4fde64bca
branches:  stable-1.6
changeset: 6082:51d4fde64bca
user:      Ruslan Ermilov <ru at nginx.com>
date:      Tue Mar 17 00:24:34 2015 +0300
description:
Core: expose maximum values of time_t and ngx_int_t.

These are needed to detect overflows.

diffstat:

 auto/unix                       |  1 +
 src/core/ngx_config.h           |  3 +++
 src/os/win32/ngx_win32_config.h |  1 +
 3 files changed, 5 insertions(+), 0 deletions(-)

diffs (37 lines):

diff --git a/auto/unix b/auto/unix
--- a/auto/unix
+++ b/auto/unix
@@ -489,6 +489,7 @@ ngx_param=NGX_OFF_T_LEN; ngx_value=$ngx_
 ngx_type="time_t"; . auto/types/sizeof
 ngx_param=NGX_TIME_T_SIZE; ngx_value=$ngx_size; . auto/types/value
 ngx_param=NGX_TIME_T_LEN; ngx_value=$ngx_max_len; . auto/types/value
+ngx_param=NGX_MAX_TIME_T_VALUE; ngx_value=$ngx_max_value; . auto/types/value
 
 
 # syscalls, libc calls and some features
diff --git a/src/core/ngx_config.h b/src/core/ngx_config.h
--- a/src/core/ngx_config.h
+++ b/src/core/ngx_config.h
@@ -85,8 +85,11 @@ typedef intptr_t        ngx_flag_t;
 
 #if (NGX_PTR_SIZE == 4)
 #define NGX_INT_T_LEN   NGX_INT32_LEN
+#define NGX_MAX_INT_T_VALUE  2147483647
+
 #else
 #define NGX_INT_T_LEN   NGX_INT64_LEN
+#define NGX_MAX_INT_T_VALUE  9223372036854775807
 #endif
 
 
diff --git a/src/os/win32/ngx_win32_config.h b/src/os/win32/ngx_win32_config.h
--- a/src/os/win32/ngx_win32_config.h
+++ b/src/os/win32/ngx_win32_config.h
@@ -175,6 +175,7 @@ typedef int                 sig_atomic_t
 #define NGX_MAX_SIZE_T_VALUE    2147483647
 #define NGX_TIME_T_LEN          (sizeof("-2147483648") - 1)
 #define NGX_TIME_T_SIZE         4
+#define NGX_MAX_TIME_T_VALUE    2147483647
 #define NGX_OFF_T_LEN           (sizeof("-9223372036854775807") - 1)
 #define NGX_MAX_OFF_T_VALUE     9223372036854775807
 #define NGX_SIG_ATOMIC_T_SIZE   4