From 7a1e6aa84ba857d2e3cdc6e5fd50e3bda210c164 Mon Sep 17 00:00:00 2001 From: Esun Kim Date: Tue, 30 Jul 2019 15:43:50 -0700 Subject: Support MSVC prior to 2015 --- upb/port.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 upb/port.c (limited to 'upb/port.c') diff --git a/upb/port.c b/upb/port.c new file mode 100644 index 0000000..023f7dc --- /dev/null +++ b/upb/port.c @@ -0,0 +1,27 @@ + +#include "upb/upb.h" +#include "upb/port_def.inc" + +#ifdef UPB_MSVC_VSNPRINTF +/* Visual C++ earlier than 2015 doesn't have standard C99 snprintf and + * vsnprintf. To support them, missing functions are manually implemented + * using the existing secure functions. */ +int msvc_vsnprintf(char* s, size_t n, const char* format, va_list arg) { + if (!s) { + return _vscprintf(format, arg); + } + int ret = _vsnprintf_s(s, n, _TRUNCATE, format, arg); + if (ret < 0) { + ret = _vscprintf(format, arg); + } + return ret; +} + +int msvc_snprintf(char* s, size_t n, const char* format, ...) { + va_list arg; + va_start(arg, format); + int ret = msvc_vsnprintf(s, n, format, arg); + va_end(arg); + return ret; +} +#endif -- cgit v1.2.3