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/* mpc_strtoc -- Read a complex number from a string.
Copyright (C) 2009, 2010, 2011 INRIA
This file is part of GNU MPC.
GNU MPC is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the
Free Software Foundation; either version 3 of the License, or (at your
option) any later version.
GNU MPC 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 Lesser General Public License for
more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see http://www.gnu.org/licenses/ .
*/
#include <string.h>
#include <ctype.h>
#include "mpc-impl.h"
static void
skip_whitespace (const char **p)
{
/* TODO: This function had better be inlined, but it is unclear whether
the hassle to get this implemented across all platforms is worth it. */
while (isspace ((unsigned char) **p))
(*p)++;
}
int
mpc_strtoc (mpc_ptr rop, const char *nptr, char **endptr, int base, mpc_rnd_t rnd)
{
const char *p;
char *end;
int bracketed = 0;
int inex_re = 0, inex_im = 0;
if (nptr == NULL || base > 36 || base == 1)
goto error;
p = nptr;
skip_whitespace (&p);
if (*p == '('){
bracketed = 1;
++p;
}
inex_re = mpfr_strtofr (mpc_realref(rop), p, &end, base, MPC_RND_RE (rnd));
if (end == p)
goto error;
p = end;
if (!bracketed)
inex_im = mpfr_set_ui (mpc_imagref (rop), 0ul, GMP_RNDN);
else {
if (!isspace ((unsigned char)*p))
goto error;
skip_whitespace (&p);
inex_im = mpfr_strtofr (mpc_imagref(rop), p, &end, base, MPC_RND_IM (rnd));
if (end == p)
goto error;
p = end;
skip_whitespace (&p);
if (*p != ')')
goto error;
p++;
}
if (endptr != NULL)
*endptr = (char*) p;
return MPC_INEX (inex_re, inex_im);
error:
if (endptr != NULL)
*endptr = (char*) nptr;
mpfr_set_nan (mpc_realref (rop));
mpfr_set_nan (mpc_imagref (rop));
return -1;
}
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