From 9ff667addf39128f43d08d4ec56a6a94ec3bb062 Mon Sep 17 00:00:00 2001
From: Russ Allbery <rra@stanford.edu>
Date: Thu, 4 Oct 2007 22:21:19 +0000
Subject: Initial import of a C portability framework and utility functions
 from remctl so that the wallet client error handling can rest on a firmer
 foundation.

---
 system.h | 45 +++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 43 insertions(+), 2 deletions(-)

(limited to 'system.h')

diff --git a/system.h b/system.h
index 4a8023e..064fecb 100644
--- a/system.h
+++ b/system.h
@@ -1,4 +1,4 @@
-/*  $Id: clibrary.h 7121 2005-01-06 00:40:37Z rra $
+/*  $Id$
 **
 **  Declarations of routines and variables in the C library.  Including this
 **  file is the equivalent of including all of the following headers,
@@ -40,4 +40,45 @@
 # endif
 #endif
 
-#endif /* !CLIBRARY_H */
+/* BEGIN_DECLS is used at the beginning of declarations so that C++
+   compilers don't mangle their names.  END_DECLS is used at the end. */
+#undef BEGIN_DECLS
+#undef END_DECLS
+#ifdef __cplusplus
+# define BEGIN_DECLS    extern "C" {
+# define END_DECLS      }
+#else
+# define BEGIN_DECLS    /* empty */
+# define END_DECLS      /* empty */
+#endif
+
+BEGIN_DECLS
+
+/* Provide prototypes for functions not declared in system headers.  Use the
+   HAVE_DECL macros for those functions that may be prototyped but
+   implemented incorrectly or implemented without a prototype. */
+#if !HAVE_ASPRINTF
+extern int              asprintf(char **, const char *, ...);
+extern int              vasprintf(char **, const char *, va_list);
+#endif
+#if !HAVE_DECL_SNPRINTF
+extern int              snprintf(char *, size_t, const char *, ...)
+    __attribute__((__format__(printf, 3, 4)));
+#endif
+#if !HAVE_DECL_VSNPRINTF
+extern int              vsnprintf(char *, size_t, const char *, va_list);
+#endif
+
+END_DECLS
+
+/* C99 requires va_copy.  Older versions of GCC provide __va_copy.  Per the
+   Autoconf manual, memcpy is a generally portable fallback. */
+#ifndef va_copy
+# ifdef __va_copy
+#  define va_copy(d, s)         __va_copy((d), (s))
+# else
+#  define va_copy(d, s)         memcpy(&(d), &(s), sizeof(va_list))
+# endif
+#endif
+
+#endif /* !SYSTEM_H */
-- 
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