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