/* Compatibility functions for floating point formatting. Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. The GNU C Library 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with the GNU C Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include <stdio.h> #include <stdlib.h> #include <float.h> #include <bits/libc-lock.h> #ifndef FLOAT_TYPE # define FLOAT_TYPE double # define FUNC_PREFIX # define FLOAT_FMT_FLAG /* Actually we have to write (DBL_DIG + log10 (DBL_MAX_10_EXP)) but we don't have log10 available in the preprocessor. */ # define MAXDIG (DBL_DIG + 3) #endif #define APPEND(a, b) APPEND2 (a, b) #define APPEND2(a, b) a##b #define FCVT_BUFFER APPEND (FUNC_PREFIX, fcvt_buffer) #define ECVT_BUFFER APPEND (FUNC_PREFIX, ecvt_buffer) static char *FCVT_BUFFER; static char *ECVT_BUFFER; static void APPEND (FUNC_PREFIX, fcvt_allocate) (void) { FCVT_BUFFER = (char *) malloc (MAXDIG); } char * APPEND (FUNC_PREFIX, fcvt) (value, ndigit, decpt, sign) FLOAT_TYPE value; int ndigit, *decpt, *sign; { __libc_once_define (static, once); __libc_once (once, APPEND (FUNC_PREFIX, fcvt_allocate)); if (FCVT_BUFFER == NULL) /* If no core is available we don't have a chance to run the program successfully and so returning NULL is an acceptable result. */ return NULL; (void) APPEND (FUNC_PREFIX, fcvt_r) (value, ndigit, decpt, sign, FCVT_BUFFER, MAXDIG); return FCVT_BUFFER; } static void APPEND (FUNC_PREFIX, ecvt_allocate) (void) { ECVT_BUFFER = (char *) malloc (MAXDIG); } char * APPEND (FUNC_PREFIX, ecvt) (value, ndigit, decpt, sign) FLOAT_TYPE value; int ndigit, *decpt, *sign; { __libc_once_define (static, once); __libc_once (once, APPEND (FUNC_PREFIX, ecvt_allocate)); if (ECVT_BUFFER == NULL) /* If no core is available we don't have a chance to run the program successfully and so returning NULL is an acceptable result. */ return NULL; (void) APPEND (FUNC_PREFIX, ecvt_r) (value, ndigit, decpt, sign, ECVT_BUFFER, MAXDIG); return ECVT_BUFFER; } char * APPEND (FUNC_PREFIX, gcvt) (value, ndigit, buf) FLOAT_TYPE value; int ndigit; char *buf; { sprintf (buf, "%.*" FLOAT_FMT_FLAG "g", ndigit, value); return buf; } /* Make sure the memory is freed if the programs ends while in memory-debugging mode and something actually was allocated. */ static void __attribute__ ((unused)) free_mem (void) { if (FCVT_BUFFER != NULL) free (FCVT_BUFFER); if (ECVT_BUFFER != NULL) free (ECVT_BUFFER); } text_set_element (__libc_subfreeres, free_mem);