| 1 | /* -*-c-*- |
| 2 | * |
| 3 | * $Id$ |
| 4 | * |
| 5 | * MP manipulation stuff |
| 6 | * |
| 7 | * (c) 2001 Straylight/Edgeware |
| 8 | */ |
| 9 | |
| 10 | /*----- Licensing notice --------------------------------------------------* |
| 11 | * |
| 12 | * This file is part of the Perl interface to Catacomb. |
| 13 | * |
| 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. |
| 18 | * |
| 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. |
| 23 | * |
| 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. |
| 27 | */ |
| 28 | |
| 29 | /*----- Header files ------------------------------------------------------*/ |
| 30 | |
| 31 | #include "catacomb-perl.h" |
| 32 | |
| 33 | /*----- Main code ---------------------------------------------------------*/ |
| 34 | |
| 35 | /* --- Convert Perl integers to multiprecision --- */ |
| 36 | |
| 37 | mp *mp_fromiv(mp *d, IV iv) |
| 38 | { |
| 39 | MP_FROMINT(d, IV, iv); |
| 40 | return (d); |
| 41 | } |
| 42 | |
| 43 | IV mp_toiv(mp *x) |
| 44 | { |
| 45 | IV i; |
| 46 | MP_TOINT(x, IV, IV_MAX, i); |
| 47 | return (i); |
| 48 | } |
| 49 | |
| 50 | /* --- Parse Perl strings into integers --- */ |
| 51 | |
| 52 | typedef struct mptext_svctx { |
| 53 | SV *sv; |
| 54 | STRLEN i; |
| 55 | } mptext_svctx; |
| 56 | |
| 57 | static int svget(void *p) |
| 58 | { |
| 59 | mptext_svctx *c = p; |
| 60 | if (c->i >= SvCUR(c->sv)) |
| 61 | return (EOF); |
| 62 | return ((unsigned char)SvPVX(c->sv)[c->i++]); |
| 63 | } |
| 64 | |
| 65 | static void svunget(int ch, void *p) |
| 66 | { |
| 67 | mptext_svctx *c = p; |
| 68 | if (ch == EOF || c->i == 0) |
| 69 | return; |
| 70 | c->i--; |
| 71 | } |
| 72 | |
| 73 | static int svput(const char *s, size_t sz, void *p) |
| 74 | { |
| 75 | mptext_svctx *c = p; |
| 76 | sv_catpvn(c->sv, (char *)s, sz); |
| 77 | return (0); |
| 78 | } |
| 79 | |
| 80 | static const mptext_ops mptext_svops = { svget, svunget, svput }; |
| 81 | |
| 82 | mp *mp_readsv(mp *m, SV *sv, STRLEN *off, int radix) |
| 83 | { |
| 84 | mptext_svctx c; |
| 85 | STRLEN len; |
| 86 | SvPV(sv, len); |
| 87 | if (!SvPOK(sv)) |
| 88 | return (0); |
| 89 | c.sv = sv; |
| 90 | c.i = off ? *off : 0; |
| 91 | m = mp_read(m, radix, &mptext_svops, &c); |
| 92 | if (off) |
| 93 | *off = c.i; |
| 94 | return (m); |
| 95 | } |
| 96 | |
| 97 | int mp_writesv(mp *m, SV *sv, int radix) |
| 98 | { |
| 99 | mptext_svctx c; |
| 100 | int rc; |
| 101 | STRLEN len; |
| 102 | SvPV(sv, len); |
| 103 | c.sv = sv; |
| 104 | rc = mp_write(m, radix, &mptext_svops, &c); |
| 105 | return (rc); |
| 106 | } |
| 107 | |
| 108 | /* --- Conversion to and from SVs --- */ |
| 109 | |
| 110 | mp *mp_fromsv(SV *sv, const char *what, const char *ty, |
| 111 | int radix, int keep, ...) |
| 112 | { |
| 113 | mp *m; |
| 114 | if (SvROK(sv)) { |
| 115 | if (sv_derived_from(sv, "Catacomb::MP") || |
| 116 | sv_derived_from(sv, "Catacomb::GF")) |
| 117 | m = (mp *)SvIV((SV *)SvRV(sv)); |
| 118 | else { |
| 119 | va_list ap; |
| 120 | SV *t = sv_newmortal(); |
| 121 | va_start(ap, keep); |
| 122 | sv_vsetpvfn(t, what, strlen(what), &ap, 0, 0, 0); |
| 123 | croak("%s is not of type %s", SvPVX(t), ty); |
| 124 | } |
| 125 | } else { |
| 126 | if (SvIOK(sv)) |
| 127 | m = mp_fromiv(MP_NEW, SvIV(sv)); |
| 128 | else |
| 129 | m = mp_readsv(MP_NEW, sv, 0, radix); |
| 130 | if (m && !keep) |
| 131 | RET(m, ty); /* Kill temporary later */ |
| 132 | } |
| 133 | return (m); |
| 134 | } |
| 135 | |
| 136 | /*----- That's all, folks -------------------------------------------------*/ |