1 // Protocol Buffers - Google's data interchange format
2 // Copyright 2023 Google LLC. All rights reserved.
3 //
4 // Use of this source code is governed by a BSD-style
5 // license that can be found in the LICENSE file or at
6 // https://developers.google.com/open-source/licenses/bsd
7
8 #ifndef UPB_PORT_VSNPRINTF_COMPAT_H_
9 #define UPB_PORT_VSNPRINTF_COMPAT_H_
10
11 // Must be last.
12 #include "upb/port/def.inc"
13
_upb_vsnprintf(char * buf,size_t size,const char * fmt,va_list ap)14 UPB_INLINE int _upb_vsnprintf(char* buf, size_t size, const char* fmt,
15 va_list ap) {
16 #if defined(__MINGW64__) || defined(__MINGW32__) || defined(_MSC_VER)
17 // The msvc runtime has a non-conforming vsnprintf() that requires the
18 // following compatibility code to become conformant.
19 int n = -1;
20 if (size != 0) n = _vsnprintf_s(buf, size, _TRUNCATE, fmt, ap);
21 if (n == -1) n = _vscprintf(fmt, ap);
22 return n;
23 #else
24 return vsnprintf(buf, size, fmt, ap);
25 #endif
26 }
27
28 #include "upb/port/undef.inc"
29
30 #endif // UPB_PORT_VSNPRINTF_COMPAT_H_
31