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/backend/port/snprintf.c

@@ -73,7 +73,7 @@ typedef unsigned long long ulong_long;
  * causing nast effects.
  **************************************************************/
 
-/*static char _id[] = "$Id: snprintf.c,v 1.15 1998/12/24 05:28:50 momjian Exp $";*/
+/*static char _id[] = "$Id: snprintf.c,v 1.16 1999/01/17 03:22:49 tgl Exp $";*/
 static char *end;
 static int	SnprfOverflow;
 
@@ -115,7 +115,7 @@ vsnprintf(char *str, size_t count, const char *fmt, va_list args)
 
 static void fmtstr __P((char *value, int ljust, int len, int zpad, int maxwidth));
 
-#ifndef HAVE_LONG_INT_64
+#ifndef HAVE_LONG_LONG_INT_64
 static void fmtnum __P((long value, int base, int dosign, int ljust, int len, int zpad));
 #else
 static void fmtnum __P((long_long value, int base, int dosign, int ljust, int len, int zpad));

src/configure.in

@@ -695,9 +695,14 @@ AC_FUNC_VPRINTF
 AC_CHECK_FUNCS(tzset memmove sigsetjmp kill sysconf fpclass)
 AC_CHECK_FUNCS(fp_class fp_class_d class)
 AC_CHECK_FUNCS(sigprocmask waitpid setsid fcvt)
+dnl We use our snprintf.c emulation if either snprintf() or vsnprintf()
+dnl is missing.  Yes, there are machines that have only one.
 AC_CHECK_FUNC(snprintf,
 	      AC_DEFINE(HAVE_SNPRINTF),
 	      SNPRINTF='snprintf.o')
+AC_CHECK_FUNC(vsnprintf,
+	      AC_DEFINE(HAVE_VSNPRINTF),
+	      SNPRINTF='snprintf.o')
 AC_SUBST(SNPRINTF)
 AC_CHECK_FUNC(isinf,
 	      AC_DEFINE(HAVE_ISINF),

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
  * ----------------

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
 

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