From 7fab608205e7a29b2a9bcd344e409edbb4cea6e3 Mon Sep 17 00:00:00 2001
From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Sun, 17 Jan 1999 03:22:52 +0000
Subject: Add configure test to see whether vsnprintf() is present, separately
 from snprintf() --- HPUX, for one, has snprintf but not vsnprintf.  Fix a
 minor typo in snprintf.c, too.

---
 src/include/c.h         | 21 +++++++++++++++++++--
 src/include/config.h.in |  3 +++
 src/include/port/hpux.h |  8 ++++++++
 3 files changed, 30 insertions(+), 2 deletions(-)

(limited to 'src/include')

diff --git a/src/include/c.h b/src/include/c.h
index cd7ecb9de2..0432d81940 100644
--- a/src/include/c.h
+++ b/src/include/c.h
@@ -7,7 +7,7 @@
  *
  * Copyright (c) 1994, Regents of the University of California
  *
- * $Id: c.h,v 1.47 1998/12/13 03:44:38 momjian Exp $
+ * $Id: c.h,v 1.48 1999/01/17 03:22:51 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -45,9 +45,13 @@
 
 /* We have to include stdlib.h here because it defines many of these macros
    on some platforms, and we only want our definitions used if stdlib.h doesn't
-   have its own.
+   have its own.  The same goes for stddef and stdarg if present.
 */
 #include <stdlib.h>
+#ifdef STDC_HEADERS
+#include <stddef.h>
+#include <stdarg.h>
+#endif
 
 /* ----------------------------------------------------------------
  *				Section 1:	bool, true, false, TRUE, FALSE
@@ -820,6 +824,19 @@ extern char *form(const char *fmt,...);
 #define COPY_CMD		"cp"
 #define SEP_CHAR		'/'
 
+/* Provide prototypes for routines not present in a particular machine's
+ * standard C library.  It'd be better to put these in config.h, but
+ * in config.h we haven't yet included anything that defines size_t...
+ */
+
+#ifndef HAVE_SNPRINTF
+extern int snprintf(char *str, size_t count, const char *fmt, ...);
+#endif
+
+#ifndef HAVE_VSNPRINTF
+extern int vsnprintf(char *str, size_t count, const char *fmt, va_list args);
+#endif
+
 /* ----------------
  *		end of c.h
  * ----------------
diff --git a/src/include/config.h.in b/src/include/config.h.in
index 3a54c89c1f..3ab45d0a73 100644
--- a/src/include/config.h.in
+++ b/src/include/config.h.in
@@ -118,6 +118,9 @@
 /* Set to 1 if you have snprintf() */
 #undef HAVE_SNPRINTF
 
+/* Set to 1 if you have vsnprintf() */
+#undef HAVE_VSNPRINTF
+
 /* Set to 1 if you have fp_class() */
 #undef HAVE_FP_CLASS
 
diff --git a/src/include/port/hpux.h b/src/include/port/hpux.h
index 4ef01af095..0c42e6c4b7 100644
--- a/src/include/port/hpux.h
+++ b/src/include/port/hpux.h
@@ -6,6 +6,14 @@ typedef struct
 	int			sema[4];
 } slock_t;
 
+/* HPUX 9 has snprintf in the library, so configure will set HAVE_SNPRINTF;
+ * but it doesn't provide a prototype for it.  To suppress warning messages
+ * from gcc, do this to make c.h provide the prototype:
+ */
+#ifndef HAVE_VSNPRINTF
+#undef HAVE_SNPRINTF
+#endif
+
 #ifndef			BIG_ENDIAN
 #define			BIG_ENDIAN		4321
 #endif
-- 
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