=================================================================== RCS file: /home/cvs/OpenXM_contrib/gmp/mpfr/Attic/set_str_raw.c,v retrieving revision 1.1.1.1 retrieving revision 1.1.1.2 diff -u -p -r1.1.1.1 -r1.1.1.2 --- OpenXM_contrib/gmp/mpfr/Attic/set_str_raw.c 2000/09/09 14:12:19 1.1.1.1 +++ OpenXM_contrib/gmp/mpfr/Attic/set_str_raw.c 2003/08/25 16:06:07 1.1.1.2 @@ -1,60 +1,76 @@ /* mpfr_set_str_raw -- set a floating-point number from a binary string -Copyright (C) 1999 PolKA project, Inria Lorraine and Loria +Copyright 1999, 2000, 2001 Free Software Foundation, Inc. This file is part of the MPFR Library. The MPFR 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 +it under the terms of the GNU Lesser General Public License as published by +the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The MPFR 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 +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 Library General Public License +You should have received a copy of the GNU Lesser General Public License along with the MPFR 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 #include -#ifdef HAS_STRING_H #include -#else -#include -#endif #include "gmp.h" #include "gmp-impl.h" #include "longlong.h" #include "mpfr.h" +#include "mpfr-impl.h" /* Currently the number should be of the form +/- xxxx.xxxxxxEyy, with decimal exponent. The mantissa of x is supposed to be large enough to hold all the bits of str. */ void -#if __STDC__ -mpfr_set_str_raw(mpfr_ptr x, char *str) -#else -mpfr_set_str_raw(x, str) - mpfr_ptr x; - char *str; -#endif +mpfr_set_str_raw (mpfr_ptr x, char *str) { char *str2, *str0, negative = 0; - unsigned long j, l, k = 0, xsize, cnt; mp_limb_t *xp; + unsigned long j, l, k = 0, xsize, cnt, alloc; mp_limb_t *xp; long expn = 0, e; char *endstr2; - xp = x -> _mp_d; - xsize = 1 + (PREC(x)-1)/BITS_PER_MP_LIMB; - str0 = str2 = (char *) malloc((strlen(str)+1)*sizeof(char)); + xp = MPFR_MANT(x); + xsize = 1 + (MPFR_PREC(x) - 1) / BITS_PER_MP_LIMB; + alloc = (strlen(str) + 1) * sizeof(char); - if (*str == '-') { negative = 1; str++; } - else if (*str == '+') str++; + if (*str == '-') + { + negative = 1; + str++; + } + else if (*str == '+') + str++; + + if (*str == 'N') + { + MPFR_SET_NAN(x); + __mpfr_flags |= MPFR_FLAGS_NAN; + return; + } + if (*str == 'I') + { + MPFR_CLEAR_NAN(x); + MPFR_SET_INF(x); + if (MPFR_ISNEG(x) != negative) + MPFR_CHANGE_SIGN(x); + return; + } + + MPFR_CLEAR_FLAGS(x); + + str0 = str2 = (char *) (*__gmp_allocate_func) (alloc); + while (*str == '0') { str++; } while (*str == '0' || *str == '1') @@ -81,31 +97,43 @@ mpfr_set_str_raw(x, str) else expn=k; endstr2 = str2; - *str2 = (char) 0; /* end of string */ - l = (strlen(str0) - 1) / BITS_PER_MP_LIMB + 1; str2 = str0; + l = endstr2 - str0; /* length of mantissa */ + if (l == 0) { /* input is zero */ + MPFR_SET_ZERO(x); + } + else { + l = (l - 1) / BITS_PER_MP_LIMB + 1; + str2 = str0; - /* str2[0]..endstr2[-1] contains the mantissa */ - for (k = 1; k <= l; k++) - { - j = 0; - xp[xsize - k] = 0; - while (str2 xsize) { + fprintf (stderr, "Error: mantissa larger than precision of destination variable in mpfr_set_str_raw\n"); + exit (1); } - for (; k <= xsize; k++) { xp[xsize - k] = 0; } + /* str2[0]..endstr2[-1] contains the mantissa */ + for (k = 1; k <= l; k++) + { + j = 0; + xp[xsize - k] = 0; + while ((str2 < endstr2) && (j < BITS_PER_MP_LIMB)) + { + xp[xsize - k] = (xp[xsize - k] << 1) + (*str2 - '0'); + str2++; j++; + } + xp[xsize - k] <<= (BITS_PER_MP_LIMB - j); + } - count_leading_zeros(cnt, xp[xsize - 1]); - if (cnt) mpn_lshift(xp, xp, xsize, cnt); + for (; k <= xsize; k++) { xp[xsize - k] = 0; } - x -> _mp_exp = expn - cnt; - x -> _mp_size = xsize; if (negative) CHANGE_SIGN(x); + count_leading_zeros(cnt, xp[xsize - 1]); + if (cnt) mpn_lshift(xp, xp, xsize, cnt); - free(str0); + MPFR_EXP(x) = expn - cnt; + if (MPFR_ISNEG(x) != negative) + MPFR_CHANGE_SIGN(x); + } + + (*__gmp_free_func) (str0, alloc); /* May change to take into account : syntax errors, overflow in exponent, string truncated because of size of x */