Initial import of the CDE 2.1.30 sources from the Open Group.

cde/programs/dtksh/ksh93/src/lib/libast/hash/memsum.c

@@ -0,0 +1,93 @@
+/* $XConsortium: memsum.c /main/3 1995/11/01 17:34:05 rswiston $ */
+/***************************************************************
+*                                                              *
+*                      AT&T - PROPRIETARY                      *
+*                                                              *
+*         THIS IS PROPRIETARY SOURCE CODE LICENSED BY          *
+*                          AT&T CORP.                          *
+*                                                              *
+*                Copyright (c) 1995 AT&T Corp.                 *
+*                     All Rights Reserved                      *
+*                                                              *
+*           This software is licensed by AT&T Corp.            *
+*       under the terms and conditions of the license in       *
+*       http://www.research.att.com/orgs/ssr/book/reuse        *
+*                                                              *
+*               This software was created by the               *
+*           Software Engineering Research Department           *
+*                    AT&T Bell Laboratories                    *
+*                                                              *
+*               For further information contact                *
+*                     gsf@research.att.com                     *
+*                                                              *
+***************************************************************/
+
+/* : : generated by proto : : */
+
+#if !defined(__PROTO__)
+#if defined(__STDC__) || defined(__cplusplus) || defined(_proto) || defined(c_plusplus)
+#if defined(__cplusplus)
+#define __MANGLE__	"C"
+#else
+#define __MANGLE__
+#endif
+#define __STDARG__
+#define __PROTO__(x)	x
+#define __OTORP__(x)
+#define __PARAM__(n,o)	n
+#if !defined(__STDC__) && !defined(__cplusplus)
+#if !defined(c_plusplus)
+#define const
+#endif
+#define signed
+#define void		int
+#define volatile
+#define __V_		char
+#else
+#define __V_		void
+#endif
+#else
+#define __PROTO__(x)	()
+#define __OTORP__(x)	x
+#define __PARAM__(n,o)	o
+#define __MANGLE__
+#define __V_		char
+#define const
+#define signed
+#define void		int
+#define volatile
+#endif
+#if defined(__cplusplus) || defined(c_plusplus)
+#define __VARARG__	...
+#else
+#define __VARARG__
+#endif
+#if defined(__STDARG__)
+#define __VA_START__(p,a)	va_start(p,a)
+#else
+#define __VA_START__(p,a)	va_start(p)
+#endif
+#endif
+#include "hashlib.h"
+
+/*
+ * return a running 32 bit checksum of buffer b of length n
+ *
+ * c is the return value from a previous
+ * memsum() or strsum() call, 0 on the first call
+ *
+ * the result is the same on all implementations
+ */
+
+unsigned long
+memsum __PARAM__((const __V_* ap, int n, register unsigned long c), (ap, n, c)) __OTORP__(const __V_* ap; int n; register unsigned long c;){
+	register const unsigned char*	p = (const unsigned char*)ap;
+	register const unsigned char*	e = p + n;
+
+	while (p < e) HASHPART(c, *p++);
+#if LONG_MAX > 2147483647
+	return(c & 0xffffffff);
+#else
+	return(c);
+#endif
+}