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ENH: MSVS 2013 snprintf compatible substitute

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Simplify the backwards compatible snprintf configuration for pre
1900 version of MSVC.  Otherwise prefer C++11 syntax using std::snprintf.
This commit is contained in:
Hans Johnson
2018-12-12 13:31:55 -06:00
committed by Christopher Dunn
parent ccd077ffce
commit 5c8e539af4
5 changed files with 37 additions and 27 deletions
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23
src/lib_json/json_value.cpp
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@@ -19,6 +19,29 @@
#include <algorithm> // min()
#include <cstddef> // size_t
// Provide implementation equivalent of std::snprintf for older _MSC compilers
#if defined(_MSC_VER) && _MSC_VER < 1900
#include <stdarg.h>
static int msvc_pre1900_c99_vsnprintf(char *outBuf, size_t size, const char *format, va_list ap)
{
int count = -1;
if (size != 0)
count = _vsnprintf_s(outBuf, size, _TRUNCATE, format, ap);
if (count == -1)
count = _vscprintf(format, ap);
return count;
}
int JSON_API msvc_pre1900_c99_snprintf(char *outBuf, size_t size, const char *format, ...)
{
va_list ap;
va_start(ap, format);
const int count = msvc_pre1900_c99_vsnprintf(outBuf, size, format, ap);
va_end(ap);
return count;
}
#endif
// Disable warning C4702 : unreachable code
#if defined(_MSC_VER) && _MSC_VER >= 1800 // VC++ 12.0 and above
#pragma warning(disable : 4702)