mirror of
https://github.com/lcn2/calc.git
synced 2025-08-19 01:13:27 +03:00
ac0d84eef8
Added notes to help/unexpected about:
display() will limit the number of digits printed after decimal point
%d will format after the decimal point for non-integer numeric values
%x will format as fractions for non-integer numeric values
fprintf(fd, "%d\n", huge_value) may need fflush(fd) to finish
Fixed Makefile dependencies for the args.h rule.
Fixed Makefile cases where echo with -n is used. On some systems,
/bin/sh does not use -n, so we must call /bin/echo -n instead
via the ${ECHON} Makefile variable.
Add missing standard tools to sub-Makefiles to make them
easier to invoke directly.
Sort lists of standard tool Makefile variables and remove duplicates.
Declare the SHELL at the top of Makefiles.
Fixed the depend rule in the custom Makefile.
Improved the messages produced by the depend in the Makefiles.
Changed the UNUSED define in have_unused.h to be a macro with
a parameter. Changed all use of UNUSED in *.c to be UNUSED(x).
Removed need for HAVE_UNUSED in building the have_unused.h file.
CCBAN is given to ${CC} in order to control if banned.h is in effect.
The banned.h attempts to ban the use of certain dangerous functions
that, if improperly used, could compromise the computational integrity
if calculations.
In the case of calc, we are motivated in part by the desire for calc
to correctly calculate: even during extremely long calculations.
If UNBAN is NOT defined, then calling certain functions
will result in a call to a non-existent function (link error).
While we do NOT encourage defining UNBAN, there may be
a system / compiler environment where re-defining a
function may lead to a fatal compiler complication.
If that happens, consider compiling as:
make clobber all chk CCBAN=-DUNBAN
as see if this is a work-a-round.
If YOU discover a need for the -DUNBAN work-a-round, PLEASE tell us!
Please send us a bug report. See the file:
BUGS
or the URL:
http://www.isthe.com/chongo/tech/comp/calc/calc-bugrept.html
for how to send us such a bug report.
Added the building of have_ban_pragma.h, which will determine
if "#pragma GCC poison func_name" is supported. If it is not,
or of HAVE_PRAGMA_GCC_POSION=-DHAVE_NO_PRAGMA_GCC_POSION, then
banned.h will have no effect.
Fixed building of the have_getpgid.h file.
Fixed building of the have_getprid.h file.
Fixed building of the have_getsid.h file.
Fixed building of the have_gettime.h file.
Fixed building of the have_strdup.h file.
Fixed building of the have_ustat.h file.
Fixed building of the have_rusage.h file.
Added HAVE_NO_STRLCPY to control if we want to test if
the system has a strlcpy() function. This in turn produces
the have_strlcpy.h file wherein the symbol HAVE_STRLCPY will
be defined, or not depending if the system comes with a
strlcpy() function.
If the system does not have a strlcpy() function, we
compile our own strlcpy() function. See strl.c for details.
Added HAVE_NO_STRLCAT to control if we want to test if
the system has a strlcat() function. This in turn produces
the have_strlcat.h file wherein the symbol HAVE_STRLCAT will
be defined, or not depending if the system comes with a
strlcat() function.
If the system does not have a strlcat() function, we
compile our own strlcat() function. See strl.c for details.
Fixed places were <string.h>, using #ifdef HAVE_STRING_H
for legacy systems that do not have that include file.
Added ${H} Makefile symbol to control the announcement
of forming and having formed hsrc related files. By default
H=@ (announce hsrc file formation) vs. H=@: to silence hsrc
related file formation.
Explicitly turn off quiet mode (set Makefile variable ${Q} to
be empty) when building rpms.
Improved and fixed the hsrc build process.
Forming rpms is performed in verbose mode to assist debugging
to the rpm build process.
Compile custom code, if needed, after main code is compiled.
272 lines
8.1 KiB
C
272 lines
8.1 KiB
C
/*
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* fposval - Determine information about the file position type
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*
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* Copyright (C) 1999,2021 Landon Curt Noll
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*
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* Calc is open software; you can redistribute it and/or modify it under
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* the terms of the version 2.1 of the GNU Lesser General Public License
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* as published by the Free Software Foundation.
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*
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* Calc is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
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* Public License for more details.
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*
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* A copy of version 2.1 of the GNU Lesser General Public License is
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* distributed with calc under the filename COPYING-LGPL. You should have
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* received a copy with calc; if not, write to Free Software Foundation, Inc.
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Under source code control: 1994/11/05 03:19:52
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* File existed as early as: 1994
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*
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* chongo <was here> /\oo/\ http://www.isthe.com/chongo/
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* Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
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*/
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/*
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* The include file have_pos.h, as built during the make process will
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* define the type FILEPOS as the type used to describe file positions.
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* We will print information regarding the size and byte order
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* of this definition.
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*
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* The stat system call returns a stat structure. One of the elements
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* of the stat structure is the st_size element. We will print information
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* regarding the size and byte order of st_size.
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*
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* We will #define of 8 symbols:
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*
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* FILEPOS_BITS length in bits of the type FILEPOS
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* FILEPOS_LEN length in octets of the type FILEPOS
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* SWAP_HALF_IN_FILEPOS will copy/swap FILEPOS into an HALF array
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* OFF_T_BITS length in bits of the st_size stat element
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* OFF_T_LEN length in octets of the st_size stat element
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* SWAP_HALF_IN_OFF_T will copy/swap st_size into an HALF array
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* DEV_BITS length in bits of the st_dev stat element
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* DEV_LEN length in bits of the st_dev stat element
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* SWAP_HALF_IN_DEV will copy/swap st_dev into an HALF array
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* INODE_BITS length in bits of the st_ino stat element
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* INODE_LEN length in octets of the st_ino stat element
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* SWAP_HALF_IN_INODE will copy/swap st_ino into an HALF array
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*
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* With regards to 'will copy/swap ... into an HALF array'. Such macros
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* will either be a copy or a copy with HALFs swapped depending on the
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* Endian order of the hardware.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include "have_fpos.h"
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#include "endian_calc.h"
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#include "have_offscl.h"
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#include "have_posscl.h"
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#include "have_fpos_pos.h"
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#include "alloc.h"
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#include "banned.h" /* include after system header <> includes */
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char *program; /* our name */
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int
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main(int argc, char **argv)
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{
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int stsizelen; /* bit length of st_size in buf */
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int fileposlen; /* bit length of FILEPOS */
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int devlen; /* bit length of st_dev in buf */
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int inodelen; /* bit length of st_ino in buf */
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struct stat buf; /* file status */
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/*
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* parse args
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*/
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program = argv[0];
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/*
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* print the file position information
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*/
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#if defined(HAVE_FPOS_POS)
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fileposlen = FPOS_POS_BITS;
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#else /* ! HAVE_FPOS_POS */
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# if defined(FPOS_BITS)
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fileposlen = FPOS_BITS;
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# else
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fileposlen = sizeof(FILEPOS)*8;
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# endif
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#endif /* ! HAVE_FPOS_POS */
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printf("#undef FILEPOS_BITS\n");
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printf("#define FILEPOS_BITS %d\n", fileposlen);
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printf("#undef FILEPOS_LEN\n");
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printf("#define FILEPOS_LEN %d\n", fileposlen/8);
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#if CALC_BYTE_ORDER == BIG_ENDIAN
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/*
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* Big Endian
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*/
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if (fileposlen == 64) {
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printf("#define SWAP_HALF_IN_FILEPOS(dest, src)\t\t%s\n",
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"SWAP_HALF_IN_B64(dest, src)");
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} else if (fileposlen == 32) {
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printf("#define SWAP_HALF_IN_FILEPOS(dest, src)\t\t%s\n",
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"SWAP_HALF_IN_B32(dest, src)");
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} else {
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fprintf(stderr, "%s: unexpected FILEPOS bit size: %d\n",
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program, fileposlen);
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exit(1);
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}
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#else /* CALC_BYTE_ORDER == BIG_ENDIAN */
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/*
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* Little Endian
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*/
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#if defined(HAVE_FILEPOS_SCALAR)
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printf("#define SWAP_HALF_IN_FILEPOS(dest, src)\t\t%s\n",
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"(*(dest) = *(src))");
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#else /* HAVE_FILEPOS_SCALAR */
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/*
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* Normally a "(*(dest) = *(src))" would do, but on some
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* systems a FILEPOS is not a scalar hence we must memcpy.
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*/
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printf("#define SWAP_HALF_IN_FILEPOS(dest, src)\t%s\n",
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"\\\n\tmemcpy((void *)(dest), (void *)(src), "
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"sizeof(FPOS_POS_LEN))");
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#endif /* HAVE_FILEPOS_SCALAR */
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#endif /* CALC_BYTE_ORDER == BIG_ENDIAN */
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putchar('\n');
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/*
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* print the stat file size information
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*/
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#if defined(OFF_T_BITS)
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stsizelen = OFF_T_BITS;
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#else
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stsizelen = sizeof(buf.st_size)*8;
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#endif
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printf("#undef OFF_T_BITS\n");
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printf("#define OFF_T_BITS %d\n", stsizelen);
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printf("#undef OFF_T_LEN\n");
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printf("#define OFF_T_LEN %d\n", stsizelen/8);
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#if CALC_BYTE_ORDER == BIG_ENDIAN
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/*
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* Big Endian
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*/
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if (stsizelen == 64) {
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printf("#define SWAP_HALF_IN_OFF_T(dest, src)\t\t%s\n",
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"SWAP_HALF_IN_B64(dest, src)");
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} else if (stsizelen == 32) {
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printf("#define SWAP_HALF_IN_OFF_T(dest, src)\t\t%s\n",
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"SWAP_HALF_IN_B32(dest, src)");
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} else {
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fprintf(stderr, "%s: unexpected st_size bit size: %d\n",
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program, stsizelen);
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exit(2);
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}
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#else /* CALC_BYTE_ORDER == BIG_ENDIAN */
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/*
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* Little Endian
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*
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* Normally a "(*(dest) = *(src))" would do, but on some
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* systems an off_t is not a scalar hence we must memcpy.
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*/
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#if defined(HAVE_OFF_T_SCALAR)
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printf("#define SWAP_HALF_IN_OFF_T(dest, src)\t\t%s\n",
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"(*(dest) = *(src))");
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#else /* HAVE_OFF_T_SCALAR */
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/*
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* Normally a "(*(dest) = *(src))" would do, but on some
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* systems, a off_t is not a scalar hence we must memcpy.
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*/
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printf("#define SWAP_HALF_IN_OFF_T(dest, src)\t%s%d%s\n",
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"memcpy((void *)(dest), (void *)(src), ", stsizelen/8, ")");
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#endif /* HAVE_OFF_T_SCALAR */
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#endif /* CALC_BYTE_ORDER == BIG_ENDIAN */
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putchar('\n');
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/*
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* print the dev_t size
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*/
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#if defined(DEV_BITS)
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devlen = DEV_BITS;
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#else
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devlen = sizeof(buf.st_dev)*8;
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#endif
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printf("#undef DEV_BITS\n");
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printf("#define DEV_BITS %d\n", devlen);
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printf("#undef DEV_LEN\n");
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printf("#define DEV_LEN %d\n", devlen/8);
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#if CALC_BYTE_ORDER == BIG_ENDIAN
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/*
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* Big Endian
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*/
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if (devlen == 64) {
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printf("#define SWAP_HALF_IN_DEV(dest, src)\t\t%s\n",
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"SWAP_HALF_IN_B64(dest, src)");
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} else if (devlen == 32) {
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printf("#define SWAP_HALF_IN_DEV(dest, src)\t\t%s\n",
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"SWAP_HALF_IN_B32(dest, src)");
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} else if (devlen == 16) {
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printf("#define SWAP_HALF_IN_DEV(dest, src)\t\t%s\n",
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"(*(dest) = *(src))");
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} else {
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fprintf(stderr, "%s: unexpected st_dev bit size: %d\n",
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program, devlen);
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exit(3);
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}
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#else /* CALC_BYTE_ORDER == BIG_ENDIAN */
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/*
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* Little Endian
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*
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* Normally a "(*(dest) = *(src))" would do, but on some
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* systems, a DEV is not a scalar hence we must memcpy.
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*/
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printf("#define SWAP_HALF_IN_DEV(dest, src)\t%s%d%s\n",
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"memcpy((void *)(dest), (void *)(src), ", devlen/8, ")");
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#endif /* CALC_BYTE_ORDER == BIG_ENDIAN */
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putchar('\n');
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/*
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* print the ino_t size
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*/
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#if defined(INODE_BITS)
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inodelen = INODE_BITS;
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#else
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inodelen = sizeof(buf.st_ino)*8;
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#endif
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printf("#undef INODE_BITS\n");
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printf("#define INODE_BITS %d\n", inodelen);
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printf("#undef INODE_LEN\n");
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printf("#define INODE_LEN %d\n", inodelen/8);
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#if CALC_BYTE_ORDER == BIG_ENDIAN
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/*
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* Big Endian
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*/
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if (inodelen == 64) {
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printf("#define SWAP_HALF_IN_INODE(dest, src)\t\t%s\n",
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"SWAP_HALF_IN_B64(dest, src)");
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} else if (inodelen == 32) {
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printf("#define SWAP_HALF_IN_INODE(dest, src)\t\t%s\n",
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"SWAP_HALF_IN_B32(dest, src)");
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} else if (inodelen == 16) {
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printf("#define SWAP_HALF_IN_INODE(dest, src)\t\t%s\n",
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"(*(dest) = *(src))");
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} else {
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fprintf(stderr, "%s: unexpected st_ino bit size: %d\n",
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program, inodelen);
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exit(4);
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}
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#else /* CALC_BYTE_ORDER == BIG_ENDIAN */
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/*
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* Little Endian
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*
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* Normally a "(*(dest) = *(src))" would do, but on some
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* systems, a INODE is not a scalar hence we must memcpy.
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*/
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printf("#define SWAP_HALF_IN_INODE(dest, src)\t%s%d%s\n",
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"memcpy((void *)(dest), (void *)(src), ", inodelen/8, ")");
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#endif /* CALC_BYTE_ORDER == BIG_ENDIAN */
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/* exit(0); */
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return 0;
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}
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