[PATCH 1/2] msvcrt: Add _CRT_INT_MAX to corecrt.h.

[Francois Gouget]

Signed-off-by: Francois Gouget <fgouget(a)codeweavers.com>
---
 include/msvcrt/corecrt.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/msvcrt/corecrt.h b/include/msvcrt/corecrt.h
index cff4549d376..ea81e95db36 100644
--- a/include/msvcrt/corecrt.h
+++ b/include/msvcrt/corecrt.h
@@ -158,6 +158,7 @@
 #endif
 
 #define _ARGMAX 100
+#define _CRT_INT_MAX 0x7fffffff
 
 #ifndef _MSVCRT_LONG_DEFINED
 #define _MSVCRT_LONG_DEFINED
-- 
2.20.1

[PATCH 2/2] msvcrt: Old versions of _vsnprintf() treat the size as a signed int.

[Francois Gouget]

When they see -1 they consider that the buffer is too small and return
an error. So impose a 2 GB limit on sprintf() for backward
compatibility with XP and 2003.

Signed-off-by: Francois Gouget <fgouget(a)codeweavers.com>
---
 include/msvcrt/stdio.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/msvcrt/stdio.h b/include/msvcrt/stdio.h
index 7477ac171a8..85059b4070b 100644
--- a/include/msvcrt/stdio.h
+++ b/include/msvcrt/stdio.h
@@ -244,7 +244,7 @@ static inline int WINAPIV sprintf(char *buffer, const char *format, ...)
     __ms_va_list args;
 
     __ms_va_start(args, format);
-    ret = _vsnprintf(buffer, (size_t)-1, format, args);
+    ret = _vsnprintf(buffer, (size_t)_CRT_INT_MAX, format, args);
     __ms_va_end(args);
     return ret;
 }
-- 
2.20.1