Imported Upstream version 93u+upstream

1 files changed, 95 insertions, 0 deletions

diff --git a/src/lib/libast/port/iblocks.c b/src/lib/libast/port/iblocks.c
new file mode 100644
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+++ b/src/lib/libast/port/iblocks.c
@@ -0,0 +1,95 @@
+/***********************************************************************
+*                                                                      *
+*               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
+/*
+ * aux function for <ls.h> iblocks() macro
+ *
+ * return number of blocks, including indirect block count
+ * given stat info
+ *
+ * mail gsf@research.att.com when you figure out the stat.st_blocks units
+ * until then we assume LS_BLOCKSIZE (512)
+ */
+
+#include <ast.h>
+#if _AIX /* XXX */
+#undef	major
+#undef	minor
+#undef	makedev
+#endif
+#include <ast_param.h>
+#include <ls.h>
+
+#if !_mem_st_blocks_stat
+
+#ifndef B_DIRECT
+#define B_DIRECT	10
+#endif
+
+#ifdef BITFS
+
+#define B_SIZE		BSIZE(st->st_dev)
+#define B_INDIRECT	NINDIR(st->st_dev)
+
+#else
+
+#ifdef BSIZE
+#define B_SIZE		BSIZE
+#else
+#define B_SIZE		1024
+#endif
+
+#ifdef NINDIR
+#define B_INDIRECT	NINDIR
+#else
+#define B_INDIRECT	128
+#endif
+
+#endif
+
+#endif
+
+off_t
+_iblocks(register struct stat* st)
+{
+#if _mem_st_blocks_stat
+
+	return (st->st_blocks <= 0 || st->st_size <= 0) ? 0 : st->st_blocks;
+
+#else
+	unsigned long	b;
+	unsigned long	t;
+
+	t = b = (st->st_size + B_SIZE - 1) / B_SIZE;
+	if ((b -= B_DIRECT) > 0)
+	{
+		t += (b - 1) / B_INDIRECT + 1;
+		if ((b -= B_INDIRECT) > 0)
+		{
+			t += (b - 1) / (B_INDIRECT * B_INDIRECT) + 1;
+			if (b > B_INDIRECT * B_INDIRECT)
+				t++;
+		}
+	}
+	return t * B_SIZE / LS_BLOCKSIZE;
+#endif
+}