| 1 | /* -*-c-*- |
| 2 | * |
| 3 | * $Id$ |
| 4 | * |
| 5 | * Utilities for Catacomb/Perl |
| 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 | #include <catacomb/ec-guts.h> |
| 33 | #include <catacomb/group-guts.h> |
| 34 | #include <catacomb/field-guts.h> |
| 35 | |
| 36 | /*----- Main code ---------------------------------------------------------*/ |
| 37 | |
| 38 | U32 findconst(const struct consttab *cc, const char *pkg, const char *name) |
| 39 | { |
| 40 | const char *p; |
| 41 | if ((p = strrchr(name, ':')) != 0) |
| 42 | name = p + 1; |
| 43 | while (cc->name) { |
| 44 | if (strcmp(cc->name, name) == 0) |
| 45 | return (cc->val); |
| 46 | cc++; |
| 47 | } |
| 48 | croak("unknown %s constant `%s'", pkg, name); |
| 49 | } |
| 50 | |
| 51 | void ptrtosv(SV **sv, void *p, const char *type) |
| 52 | { |
| 53 | if (p) |
| 54 | sv_setref_pv(*sv, type, (void *)p); |
| 55 | else |
| 56 | *sv = &PL_sv_undef; |
| 57 | } |
| 58 | |
| 59 | void *ptrfromsv(SV *sv, const char *type, const char *what, ...) |
| 60 | { |
| 61 | if (!sv_derived_from(sv, type)) { |
| 62 | va_list ap; |
| 63 | SV *t = sv_newmortal(); |
| 64 | va_start(ap, what); |
| 65 | sv_vsetpvfn(t, what, strlen(what), &ap, 0, 0, 0); |
| 66 | croak("%s is not of type %s", SvPVX(t), type); |
| 67 | } |
| 68 | return (void *)SvIV((SV *)SvRV(sv)); |
| 69 | } |
| 70 | |
| 71 | /*----- Reconstructing various objects ------------------------------------*/ |
| 72 | |
| 73 | /* --- Somewhat unpleasant, really --- */ |
| 74 | |
| 75 | field *copy_field(field *f) |
| 76 | { |
| 77 | if (strcmp(F_NAME(f), "prime") == 0) |
| 78 | f = field_prime(f->m); |
| 79 | else if (strcmp(F_NAME(f), "niceprime") == 0) |
| 80 | f = field_niceprime(f->m); |
| 81 | else if (strcmp(F_NAME(f), "binpoly") == 0) |
| 82 | f = field_binpoly(f->m); |
| 83 | else if (strcmp(F_NAME(f), "binnorm") == 0) { |
| 84 | fctx_binnorm *fc = (fctx_binnorm *)f; |
| 85 | f = field_binnorm(f->m, fc->ntop.r[fc->ntop.n - 1]); |
| 86 | } else |
| 87 | f = 0; |
| 88 | return (f); |
| 89 | } |
| 90 | |
| 91 | ec_curve *copy_curve(ec_curve *c) |
| 92 | { |
| 93 | field *f; |
| 94 | mp *a, *b; |
| 95 | |
| 96 | if ((f = copy_field(c->f)) == 0) |
| 97 | return (0); |
| 98 | a = F_OUT(f, MP_NEW, c->a); |
| 99 | b = F_OUT(f, MP_NEW, c->b); |
| 100 | if (strcmp(EC_NAME(c), "prime") == 0) |
| 101 | c = ec_prime(f, a, b); |
| 102 | else if (strcmp(EC_NAME(c), "primeproj") == 0) |
| 103 | c = ec_primeproj(f, a, b); |
| 104 | if (strcmp(EC_NAME(c), "bin") == 0) |
| 105 | c = ec_bin(f, a, b); |
| 106 | else if (strcmp(EC_NAME(c), "binproj") == 0) |
| 107 | c = ec_binproj(f, a, b); |
| 108 | else |
| 109 | c = 0; |
| 110 | MP_DROP(a); |
| 111 | MP_DROP(b); |
| 112 | if (!c) F_DESTROY(f); |
| 113 | return (c); |
| 114 | } |
| 115 | |
| 116 | group *copy_group(group *g) |
| 117 | { |
| 118 | if (strcmp(G_NAME(g), "prime") == 0) { |
| 119 | gctx_prime *gc = (gctx_prime *)g; |
| 120 | gprime_param gp; |
| 121 | gp.g = G_TOINT(g, MP_NEW, g->g); |
| 122 | gp.p = gc->mm.m; |
| 123 | gp.q = gc->g.r; |
| 124 | g = group_prime(&gp); |
| 125 | MP_DROP(gp.g); |
| 126 | } else if (strcmp(G_NAME(g), "ec") == 0) { |
| 127 | gctx_ec *gc = (gctx_ec *)g; |
| 128 | ec_info ei; |
| 129 | if ((ei.c = copy_curve(gc->ei.c)) == 0) |
| 130 | return (0); |
| 131 | EC_CREATE(&ei.g); |
| 132 | EC_COPY(&ei.g, &gc->ei.g); |
| 133 | ei.r = MP_COPY(gc->ei.r); |
| 134 | ei.h = MP_COPY(gc->ei.h); |
| 135 | g = group_ec(&ei); |
| 136 | } else |
| 137 | g = 0; |
| 138 | return (g); |
| 139 | } |
| 140 | |
| 141 | /*----- That's all, folks -------------------------------------------------*/ |