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e18a305777
This patch refactors the *cvt functions implementation in a way that makes it easier to re-use them for implementing the IEEE long double on powerpc64le. By splitting the implementation per se in one file (efgcvt-template.c) and the alias definitions in others (e.g. efgcvt.c), the new code makes it easier to define new function names, such as __qecvtieee128. Tested that installed stripped binaries for all build-many-glibcs targets remain identical before and after this patch. Also tested for powerpc64le and x86_64. Reviewed-by: Paul E. Murphy <murphyp@linux.ibm.com>
79 lines
2.2 KiB
C
79 lines
2.2 KiB
C
/* Compatibility functions for floating point formatting.
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Copyright (C) 1995-2019 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <math.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/param.h>
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#include <libc-lock.h>
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#include <math_ldbl_opt.h>
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#define APPEND(a, b) APPEND2 (a, b)
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#define APPEND2(a, b) a##b
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#define __APPEND(a, b) __APPEND2 (a, b)
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#define __APPEND2(a, b) __##a##b
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#define FCVT_BUFFER APPEND (FUNC_PREFIX, fcvt_buffer)
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#define FCVT_BUFPTR APPEND (FUNC_PREFIX, fcvt_bufptr)
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#define ECVT_BUFFER APPEND (FUNC_PREFIX, ecvt_buffer)
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static char FCVT_BUFFER[MAXDIG];
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static char ECVT_BUFFER[MAXDIG];
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libc_freeres_ptr (static char *FCVT_BUFPTR);
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char *
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__APPEND (FUNC_PREFIX, fcvt) (FLOAT_TYPE value, int ndigit, int *decpt,
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int *sign)
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{
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if (FCVT_BUFPTR == NULL)
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{
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if (__APPEND (FUNC_PREFIX, fcvt_r) (value, ndigit, decpt, sign,
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FCVT_BUFFER, MAXDIG) != -1)
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return FCVT_BUFFER;
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FCVT_BUFPTR = (char *) malloc (FCVT_MAXDIG);
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if (FCVT_BUFPTR == NULL)
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return FCVT_BUFFER;
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}
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(void) __APPEND (FUNC_PREFIX, fcvt_r) (value, ndigit, decpt, sign,
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FCVT_BUFPTR, FCVT_MAXDIG);
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return FCVT_BUFPTR;
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}
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char *
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__APPEND (FUNC_PREFIX, ecvt) (FLOAT_TYPE value, int ndigit, int *decpt,
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int *sign)
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{
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(void) __APPEND (FUNC_PREFIX, ecvt_r) (value, ndigit, decpt, sign,
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ECVT_BUFFER, MAXDIG);
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return ECVT_BUFFER;
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}
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char *
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__APPEND (FUNC_PREFIX, gcvt) (FLOAT_TYPE value, int ndigit, char *buf)
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{
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sprintf (buf, "%.*" FLOAT_FMT_FLAG "g", MIN (ndigit, NDIGIT_MAX), value);
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return buf;
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}
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