| 1 | /* -*-c-*- |
| 2 | * |
| 3 | * Dynamic string I/O for group elements |
| 4 | * |
| 5 | * (c) 2004 Straylight/Edgeware |
| 6 | */ |
| 7 | |
| 8 | /*----- Licensing notice --------------------------------------------------* |
| 9 | * |
| 10 | * This file is part of Catacomb. |
| 11 | * |
| 12 | * Catacomb is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU Library General Public License as |
| 14 | * published by the Free Software Foundation; either version 2 of the |
| 15 | * License, or (at your option) any later version. |
| 16 | * |
| 17 | * Catacomb is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU Library General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU Library General Public |
| 23 | * License along with Catacomb; if not, write to the Free |
| 24 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
| 25 | * MA 02111-1307, USA. |
| 26 | */ |
| 27 | |
| 28 | /*----- Header files ------------------------------------------------------*/ |
| 29 | |
| 30 | #include "group.h" |
| 31 | |
| 32 | /*----- Main code ---------------------------------------------------------*/ |
| 33 | |
| 34 | /* --- @group_readdstr@ --- * |
| 35 | * |
| 36 | * Arguments: @group *g@ = an abstract group |
| 37 | * @ge *d@ = destination group element |
| 38 | * @dstr *dd@ = string to read from |
| 39 | * @size_t *off@ = offset to start at (updated) |
| 40 | * |
| 41 | * Returns: Zero on success, nonzero on failure. |
| 42 | * |
| 43 | * Use: Parses a group element from a dynamic string. |
| 44 | */ |
| 45 | |
| 46 | int group_readdstr(group *g, ge *d, dstr *dd, size_t *off) |
| 47 | { |
| 48 | mptext_dstrctx md; |
| 49 | |
| 50 | md.d = dd; |
| 51 | md.i = off ? *off : 0; |
| 52 | if (G_READ(g, d, &mptext_dstrops, &md)) |
| 53 | return (-1); |
| 54 | if (off) *off = md.i; |
| 55 | return (0); |
| 56 | } |
| 57 | |
| 58 | /* --- @group_writedstr@ --- * |
| 59 | * |
| 60 | * Arguments: @group *g@ = an abstract group |
| 61 | * @ge *x@ = a group element |
| 62 | * @dstr *d@ = string to write to |
| 63 | * @size_t sz@ = how long the buffer is |
| 64 | * |
| 65 | * Returns: Zero on success, nonzero on failure. |
| 66 | * |
| 67 | * Use: Writes a group element to a dstr buffer. |
| 68 | */ |
| 69 | |
| 70 | int group_writedstr(group *g, ge *x, dstr *d) |
| 71 | { |
| 72 | mptext_dstrctx md; |
| 73 | |
| 74 | md.d = d; |
| 75 | if (G_WRITE(g, x, &mptext_dstrops, &md)) |
| 76 | return (-1); |
| 77 | DPUTZ(d); |
| 78 | return (0); |
| 79 | } |
| 80 | |
| 81 | |
| 82 | |
| 83 | /*----- That's all, folks -------------------------------------------------*/ |