5 * MP manipulation stuff
7 * (c) 2001 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of the Perl interface to Catacomb.
14 * Catacomb/Perl is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * Catacomb/Perl is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with Catacomb/Perl; if not, write to the Free Software Foundation,
26 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
29 /*----- Header files ------------------------------------------------------*/
31 #include "catacomb-perl.h"
33 /*----- Main code ---------------------------------------------------------*/
35 /* --- Convert Perl integers to multiprecision --- */
37 mp *mp_fromiv(mp *d, IV iv)
39 MP_FROMINT(d, IV, iv);
46 MP_TOINT(x, IV, IV_MAX, i);
50 /* --- Parse Perl strings into integers --- */
52 typedef struct mptext_svctx {
57 static int svget(void *p)
60 if (c->i >= SvCUR(c->sv))
62 return ((unsigned char)SvPVX(c->sv)[c->i++]);
65 static void svunget(int ch, void *p)
68 if (ch == EOF || c->i == 0)
73 static int svput(const char *s, size_t sz, void *p)
76 sv_catpvn(c->sv, (char *)s, sz);
80 static const mptext_ops mptext_svops = { svget, svunget, svput };
82 mp *mp_readsv(mp *m, SV *sv, STRLEN *off, int radix)
91 m = mp_read(m, radix, &mptext_svops, &c);
97 int mp_writesv(mp *m, SV *sv, int radix)
104 rc = mp_write(m, radix, &mptext_svops, &c);
108 /* --- Conversion to and from SVs --- */
110 mp *mp_fromsv(SV *sv, const char *what, const char *ty,
111 int radix, int keep, ...)
115 if (sv_derived_from(sv, "Catacomb::MP"))
116 m = (mp *)SvIV((SV *)SvRV(sv));
119 SV *t = sv_newmortal();
121 sv_vsetpvfn(t, what, strlen(what), &ap, 0, 0, 0);
122 croak("%s is not of type %s", SvPVX(t), ty);
128 m = mp_fromiv(MP_NEW, SvIV(sv));
130 m = mp_readsv(MP_NEW, sv, 0, radix);
132 RET(m, ty); /* Kill temporary later */
137 /*----- That's all, folks -------------------------------------------------*/