pmt: initial 3.0.2 update

include/libgnulib/stat-size.h

@@ -0,0 +1,94 @@
+/* Yield size-related values in struct stat.
+   Copyright (C) 1989, 1991-2024 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef STAT_SIZE_H
+#define STAT_SIZE_H
+
+/* This file uses HAVE_SYS_PARAM_H, HAVE_STRUCT_STAT_ST_BLOCKS.  */
+#if !_GL_CONFIG_H_INCLUDED
+ #error "Please include config.h first."
+#endif
+
+/* sys/param.h may define DEV_BSIZE */
+#if HAVE_SYS_PARAM_H
+# include <sys/param.h>
+#endif
+
+/* The device blocksize, or a faked version thereof.
+   But use ST_NBLOCKSIZE instead.
+   Usually defined by sys/param.h (if at all).  */
+#if !defined DEV_BSIZE && defined BSIZE
+# define DEV_BSIZE BSIZE
+#endif
+#if !defined DEV_BSIZE && defined BBSIZE /* SGI sys/param.h */
+# define DEV_BSIZE BBSIZE
+#endif
+#ifndef DEV_BSIZE
+# define DEV_BSIZE 4096
+#endif
+
+/* Extract or fake data from a struct stat *st.
+   STP_BLKSIZE(st): Preferred performance I/O blocksize, in bytes.
+   STP_NBLOCKS(st): Number of blocks, including indirect blocks.
+   ST_NBLOCKSIZE: Size of blocks used when calculating ST_NBLOCKS.  */
+#ifndef HAVE_STRUCT_STAT_ST_BLOCKS
+# define STP_BLKSIZE(st) DEV_BSIZE
+  /* coreutils' fileblocks.c also uses BSIZE.  */
+# if defined _POSIX_SOURCE || !defined BSIZE
+#  define STP_NBLOCKS(st) \
+    ((st)->st_size / ST_NBLOCKSIZE + ((st)->st_size % ST_NBLOCKSIZE != 0))
+# else
+   /* This definition calls st_blocks, which is in the fileblocks module. */
+#  define STP_NBLOCKS(st) \
+    (S_ISREG ((st)->st_mode) || S_ISDIR ((st)->st_mode) \
+     ? st_blocks ((st)->st_size) : 0)
+# endif
+#else
+/* When running 'rsh hpux11-system cat any-file', cat would
+   determine that the output stream had an st_blksize of 2147421096.
+   Conversely st_blksize can be 2 GiB (or maybe even larger) with XFS
+   on 64-bit hosts.  Somewhat arbitrarily, limit the "optimal" block
+   size to SIZE_MAX / 8 + 1.  (Dividing SIZE_MAX by only 4 wouldn't
+   suffice, since "cat" sometimes multiplies the result by 4.)  If
+   anyone knows of a system for which this limit is too small, please
+   report it as a bug in this code.  */
+# define STP_BLKSIZE(st) ((0 < (st)->st_blksize \
+                           && (st)->st_blksize <= (size_t) -1 / 8 + 1)  \
+                          ? (st)->st_blksize : DEV_BSIZE)
+# if defined hpux || defined __hpux__ || defined __hpux
+  /* HP-UX counts st_blocks in 1024-byte units.
+     This loses when mixing HP-UX and BSD file systems with NFS.  */
+#  define ST_NBLOCKSIZE 1024
+# endif
+#endif
+
+#ifndef STP_NBLOCKS
+# define STP_NBLOCKS(st) ((st)->st_blocks)
+#endif
+
+#ifndef ST_NBLOCKSIZE
+# ifdef S_BLKSIZE
+#  define ST_NBLOCKSIZE S_BLKSIZE
+# else
+#  define ST_NBLOCKSIZE 512
+# endif
+#endif
+
+/* Preferred blocksize and number of blocks for a struct stat object.  */
+#define ST_BLKSIZE(statbuf) STP_BLKSIZE (&(statbuf))
+#define ST_NBLOCKS(statbuf) STP_NBLOCKS (&(statbuf))
+
+#endif /* STAT_SIZE_H */