Imported Upstream version 93u+upstream

1 files changed, 71 insertions, 0 deletions

diff --git a/src/lib/libast/misc/reclen.c b/src/lib/libast/misc/reclen.c
new file mode 100644
index 0000000..ec927f8
--- /dev/null
+++ b/src/lib/libast/misc/reclen.c
@@ -0,0 +1,71 @@
+/***********************************************************************
+*                                                                      *
+*               This software is part of the ast package               *
+*          Copyright (c) 1985-2011 AT&T Intellectual Property          *
+*                      and is licensed under the                       *
+*                 Eclipse Public License, Version 1.0                  *
+*                    by AT&T Intellectual Property                     *
+*                                                                      *
+*                A copy of the License is available at                 *
+*          http://www.eclipse.org/org/documents/epl-v10.html           *
+*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
+*                                                                      *
+*              Information and Software Systems Research               *
+*                            AT&T Research                             *
+*                           Florham Park NJ                            *
+*                                                                      *
+*                 Glenn Fowler <gsf@research.att.com>                  *
+*                  David Korn <dgk@research.att.com>                   *
+*                   Phong Vo <kpv@research.att.com>                    *
+*                                                                      *
+***********************************************************************/
+#pragma prototyped
+
+/*
+ * return the length of the current record at b, size n, according to f
+ * -1 returned on error
+ *  0 returned if more data is required
+ */
+
+#include <recfmt.h>
+#include <ctype.h>
+
+ssize_t
+reclen(Recfmt_t f, const void* b, size_t n)
+{
+	register unsigned char*	s = (unsigned char*)b;
+	register unsigned char*	e;
+	size_t			h;
+	size_t			z;
+
+	switch (RECTYPE(f))
+	{
+	case REC_delimited:
+		if (e = (unsigned char*)memchr(s, REC_D_DELIMITER(f), n))
+			return e - s + 1;
+		return 0;
+	case REC_fixed:
+		return REC_F_SIZE(f);
+	case REC_variable:
+		h = REC_V_HEADER(f);
+		if (n < h)
+			return 0;
+		z = 0;
+		s += REC_V_OFFSET(f);
+		e = s + REC_V_LENGTH(f);
+		if (REC_V_LITTLE(f))
+			while (e > s)
+				z = (z<<8)|*--e;
+		else
+			while (s < e)
+				z = (z<<8)|*s++;
+		if (!REC_V_INCLUSIVE(f))
+			z += h;
+		else if (z < h)
+			z = h;
+		return z;
+	case REC_method:
+		return -1;
+	}
+	return -1;
+}