f3154aabe4
* include/libmes.h (dtoab): Declare. * lib/mes/ntoab.c (ntoab): Update. * lib/mes/dtoab.c: New file. * build-aux/configure-lib.sh (libmes_SOURCES, libc_tcc_SOURCES): Add it. * lib/tests/mes/90-dtoab.c: Test it. * lib/tests/stdio/90-sprintf.c: Test it. * build-aux/check-mescc.sh (tests): Run it, against... * lib/tests/mes/90-dtoab.stdout: ...baseline. * lib/stdio/vfprintf.c (vfprintf): Support %f, even more naive support for %e, %E, %g, %G. * lib/stdio/vsnprintf.c (vsnprintf): Likewise.
47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
/* -*-comment-start: "//";comment-end:""-*-
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* GNU Mes --- Maxwell Equations of Software
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* Copyright © 2016,2017,2018,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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*
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* This file is part of GNU Mes.
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*
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* GNU Mes is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* GNU Mes is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <mes/lib.h>
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#include <limits.h>
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#include <string.h>
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char *
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dtoab (double d, int base, int signed_p)
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{
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static char dtoa_buf[40];
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long i = (long) d;
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char *p = ntoab (i, base, signed_p);
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strcpy (dtoa_buf, p);
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long f = (d - (double) i) * (double) 100000000000;
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if (f)
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{
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if (f < 0)
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f = -f;
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strcat (dtoa_buf, ".");
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p = ntoab (f, base, 1);
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strcat (dtoa_buf, p);
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p = strchr (dtoa_buf, 0);
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p--;
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while (*p && *p == '0')
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*p-- = 0;
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}
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return dtoa_buf;
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}
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