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https://github.com/lcn2/calc.git
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340c1990ce
Restored use of the #define FPOS_POS_LEN symbol. This refers to the length of the __pos element (if the __pos element exists), the fpos_t type (if that type exists). Changed SWAP_HALF_IN_FILEPOS(dest, src) mato to use FILEPOS_LEN Little Endian when FILEPOS is a simple scalar type (i.e., HAVE_FILEPOS_SCALAR is defined). Changed #define HAVE_FPOS to HAVE_FGETSETPOS. Corrected comment in have_fpos_pos.h. The HAVE_FPOS_POS symbol was NOT related to fgetpos & fsetpos but rather if we we have an __pos element in FILEPOS. Changed #define HAVE_NO_FPOS to HAVE_NO_FGETSETPOS. Improved comments in have_fpos_pos.h to show why and how HAVE_FPOS_POS, FPOS_POS_BITS, and FPOS_POS_LEN were defined or undefed. Changed showfiles builtin to print sizes cast to (long int) with the "%ld" printf format to avoid implementations that do not support the "%lld" printf format specifier.
80 lines
2.6 KiB
C
80 lines
2.6 KiB
C
/*
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* have_fpos_pos - Determine if a __pos element in FILEPOS
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*
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* Copyright (C) 2000,2021 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: 2000/12/17 01:23
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* File existed as early as: 2000
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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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#include <stdio.h>
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#include "have_fpos.h"
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#include "have_posscl.h"
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#include "banned.h" /* include after system header <> includes */
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int
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main(void)
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{
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#if defined(HAVE_FILEPOS_SCALAR)
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printf("/* HAVE_FILEPOS_SCALAR is defined, we assume FILEPOS is scalar */\n");
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printf("/* we assume we have no __pos in FILEPOS */\n");
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printf("#undef HAVE_FPOS_POS\t/* no */\n");
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printf("#undef FPOS_POS_BITS\n");
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printf("#undef FPOS_POS_LEN\n");
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#else
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printf("/* HAVE_FILEPOS_SCALAR is undefined, we assume FILEPOS is not scalar */\n");
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# if defined(HAVE_NO_FPOS_POS)
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printf("/* HAVE_NO_FPOS_POS defiled, we assume we have no __pos in FILEPOS */\n");
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printf("#undef HAVE_FPOS_POS\t/* no */\n");
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printf("#undef FPOS_POS_BITS\n");
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printf("#undef FPOS_POS_LEN\n");
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# elif defined(FPOS_POS_BITS)
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printf("/* FPOS_POS_BITS defiled, assume we have __pos in FILEPOS */\n");
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printf("#undef HAVE_FPOS_POS\n");
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printf("#define HAVE_FPOS_POS 1 /* yes */\n");
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printf("#undef FPOS_POS_BITS\n");
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printf("#define FPOS_POS_BITS %d\n", FPOS_POS_BITS);
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printf("#undef FPOS_POS_LEN\n");
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printf("#define FPOS_POS_LEN %d\n", int(FPOS_POS_BITS/8));
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# else
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fpos_t pos; /* file position */
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memset(&pos, 0, sizeof(pos)); /* zeroize pos to "set it" */
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printf("/* we successfully compiled with a fpos_t type wit an __pos element */\n");
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printf("#undef HAVE_FPOS_POS\n");
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printf("#define HAVE_FPOS_POS 1 /* yes */\n");
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printf("#undef FPOS_POS_BITS\n");
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printf("#define FPOS_POS_BITS %lu\n", sizeof(pos.__pos)*8);
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printf("#undef FPOS_POS_LEN\n");
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printf("#define FPOS_POS_LEN %lu\n", sizeof(pos.__pos));
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# endif
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#endif
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/* exit(0); */
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return 0;
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}
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