1 files changed, 67 insertions, 0 deletions
diff --git a/src/lib/arch/vsnprintf.h b/src/lib/arch/vsnprintf.h
new file mode 100644
index 0000000..5a4e3dc
--- /dev/null
+++ b/src/lib/arch/vsnprintf.h
@@ -0,0 +1,67 @@
+/*
+ * barrier -- mouse and keyboard sharing utility
+ * Copyright (C) 2012-2016 Symless Ltd.
+ * Copyright (C) 2002 Chris Schoeneman
+ * 
+ * This package is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * found in the file LICENSE that should have accompanied this file.
+ * 
+ * This package is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "arch/IArchString.h"
+
+#if HAVE_VSNPRINTF
+
+#if !defined(ARCH_VSNPRINTF)
+#    define ARCH_VSNPRINTF vsnprintf
+#endif
+
+int
+IArchString::vsnprintf(char* str, int size, const char* fmt, va_list ap)
+{
+    int n = ::ARCH_VSNPRINTF(str, size, fmt, ap);
+    if (n > size) {
+        n = -1;
+    }
+    return n;
+}
+
+#elif SYSAPI_UNIX // !HAVE_VSNPRINTF
+
+#include <stdio.h>
+
+int
+IArchString::vsnprintf(char* str, int size, const char* fmt, va_list ap)
+{
+    static FILE* bitbucket = fopen("/dev/null", "w");
+    if (bitbucket == NULL) {
+        // uh oh
+        if (size > 0) {
+            str[0] = '\0';
+        }
+        return 0;
+    }
+    else {
+        // count the characters using the bitbucket
+        int n = vfprintf(bitbucket, fmt, ap);
+        if (n + 1 <= size) {
+            // it'll fit so print it into str
+            vsprintf(str, fmt, ap);
+        }
+        return n;
+    }
+}
+
+#else // !HAVE_VSNPRINTF && !SYSAPI_UNIX
+
+#error vsnprintf not implemented
+
+#endif // !HAVE_VSNPRINTF