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diff --git a/lib/lwres/print_p.h b/lib/lwres/print_p.h
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+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/* $Id: print_p.h,v 1.6 2010/08/16 23:46:52 tbox Exp $ */
+
+#ifndef LWRES_PRINT_P_H
+#define LWRES_PRINT_P_H 1
+
+/***
+ *** Imports
+ ***/
+
+#include <lwres/lang.h>
+#include <lwres/platform.h>
+
+/*
+ * This block allows lib/lwres/print.c to be cleanly compiled even if
+ * the platform does not need it. The standard Makefile will still
+ * not compile print.c or archive print.o, so this is just to make test
+ * compilation ("make print.o") easier.
+ */
+#if !defined(LWRES_PLATFORM_NEEDVSNPRINTF) && defined(LWRES__PRINT_SOURCE)
+#define LWRES_PLATFORM_NEEDVSNPRINTF
+#endif
+
+#if !defined(LWRES_PLATFORM_NEEDSPRINTF) && defined(LWRES__PRINT_SOURCE)
+#define LWRES_PLATFORM_NEEDSPRINTF
+#endif
+
+/***
+ *** Macros.
+ ***/
+
+#ifdef __GNUC__
+#define LWRES_FORMAT_PRINTF(fmt, args) \
+ __attribute__((__format__(__printf__, fmt, args)))
+#else
+#define LWRES_FORMAT_PRINTF(fmt, args)
+#endif
+
+/***
+ *** Functions
+ ***/
+
+#ifdef LWRES_PLATFORM_NEEDVSNPRINTF
+#include <stdarg.h>
+#include <stddef.h>
+#endif
+
+LWRES_LANG_BEGINDECLS
+
+#ifdef LWRES_PLATFORM_NEEDVSNPRINTF
+int
+lwres__print_vsnprintf(char *str, size_t size, const char *format, va_list ap)
+ LWRES_FORMAT_PRINTF(3, 0);
+#ifdef vsnprintf
+#undef vsnprintf
+#endif
+#define vsnprintf lwres__print_vsnprintf
+
+int
+lwres__print_snprintf(char *str, size_t size, const char *format, ...)
+ LWRES_FORMAT_PRINTF(3, 4);
+#ifdef snprintf
+#undef snprintf
+#endif
+#define snprintf lwres__print_snprintf
+#endif /* LWRES_PLATFORM_NEEDVSNPRINTF */
+
+#ifdef LWRES_PLATFORM_NEEDSPRINTF
+int
+lwres__print_sprintf(char *str, const char *format, ...) LWRES_FORMAT_PRINTF(2, 3);
+#ifdef sprintf
+#undef sprintf
+#endif
+#define sprintf lwres__print_sprintf
+#endif
+
+LWRES_LANG_ENDDECLS
+
+#endif /* LWRES_PRINT_P_H */