early-access version 2853

externals/vcpkg/ports/epsilon/0001-VS2015-provides-snprintf.patch

@@ -0,0 +1,51 @@
+From 8b5b2ea5ba695252abaad4234c951675d5f733ec Mon Sep 17 00:00:00 2001
+From: Hiroshi Miura <miurahr@linux.com>
+Date: Wed, 7 Feb 2018 12:28:54 +0900
+Subject: [PATCH 1/2] VS2015 provides snprintf
+
+Signed-off-by: Hiroshi Miura <miurahr@linux.com>
+---
+ lib/common.h | 27 +++++++++++++++++++++++----
+ 1 file changed, 23 insertions(+), 4 deletions(-)
+
+diff --git a/lib/common.h b/lib/common.h
+index c5db1ed..73c4118 100644
+--- a/lib/common.h
++++ b/lib/common.h
+@@ -39,10 +39,29 @@ extern "C" {
+ /** \addtogroup misc Miscellanea */
+ /*@{*/
+ 
+-/* Use _snprintf instead of snprintf under MSVC compiler */
+-#if defined(_WIN32) && !defined(__MINGW32__)
+-#define snprintf    _snprintf
+-#endif
++#ifdef _MSC_VER
++#if _MSC_VER < 1900  // VS2015/17 provides snprintf
++#include <stdio.h>
++#include <stdarg.h>
++/* Want safe, 'n += snprintf(b + n ...)' like function. If cp_max_len is 1
++* then assume cp is pointing to a null char and do nothing. Returns number
++* number of chars placed in cp excluding the trailing null char. So for
++* cp_max_len > 0 the return value is always < cp_max_len; for cp_max_len
++* <= 0 the return value is 0 (and no chars are written to cp). */
++static int snprintf(char * cp, int cp_max_len, const char * fmt, ...)
++{
++    va_list args;
++    int n;
++
++    if (cp_max_len < 2)
++        return 0;
++    va_start(args, fmt);
++    n = vsnprintf(cp, cp_max_len, fmt, args);
++    va_end(args);
++    return (n < cp_max_len) ? n : (cp_max_len - 1);
++}
++#endif  // _MSC_VER < 1900
++#endif  // _MSC_VER
+ 
+ #ifdef HAVE_CONFIG_H
+ # include <config.h>
+-- 
+2.16.1
+