[PATCH] Fix handling of era in strftime (month off-by-one error)

[Akio Idehara]

Hi, All.

I found a bug in the handling of era in strftime (month off-by-one error).

In the era info database (lc_era.h in cygwin),
the range of the month part is from 1 to 12.
(Ex: the era format in lc_era.h is like "1989/12/31")
But the range of tm_mon is from 0 to 11,
and strftime doesn't treat it.

Signed-off-by: Akio Idehara <zbe64533@gmail.com>
---
   libc/time/strftime.c |    6 +++---
   1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/libc/time/strftime.c b/libc/time/strftime.c
index f4704b6..840e310 100755
--- a/libc/time/strftime.c
+++ b/libc/time/strftime.c
@@ -426,7 +426,7 @@ get_era_info (const struct tm *tim_p, const char *era)
         /* Adjust offset for negative gregorian dates. */
         if (stm.tm_year <= -YEAR_BASE)
         	++stm.tm_year;
-      stm.tm_mon = ERA_STRTOL (c + 1, &c, 10);
+      stm.tm_mon = ERA_STRTOL (c + 1, &c, 10) - 1;
         stm.tm_mday = ERA_STRTOL (c + 1, &c, 10);
         stm.tm_hour = stm.tm_min = stm.tm_sec = 0;
         era = c + 1;
@@ -440,7 +440,7 @@ get_era_info (const struct tm *tim_p, const char *era)
         else if (era[0] == '+' && era[1] == '*')
   	{
   	  etm.tm_year = INT_MAX;
-	  etm.tm_mon = 12;
+	  etm.tm_mon = 11;
   	  etm.tm_mday = 31;
   	  etm.tm_hour = 23;
   	  etm.tm_min = etm.tm_sec = 59;
@@ -452,7 +452,7 @@ get_era_info (const struct tm *tim_p, const char *era)
   	  /* Adjust offset for negative gregorian dates. */
   	  if (etm.tm_year <= -YEAR_BASE)
   	    ++etm.tm_year;
-	  etm.tm_mon = ERA_STRTOL (c + 1, &c, 10);
+	  etm.tm_mon = ERA_STRTOL (c + 1, &c, 10) - 1;
   	  etm.tm_mday = ERA_STRTOL (c + 1, &c, 10);
   	  etm.tm_mday = 31;
   	  etm.tm_hour = 23;
-- 
1.7.5.1