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1 | /* -*-c-*- |
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2 | * |
| 3 | * String I/O for group elements |
| 4 | * |
| 5 | * (c) 2004 Straylight/Edgeware |
| 6 | */ |
| 7 | |
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8 | /*----- Licensing notice --------------------------------------------------* |
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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. |
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16 | * |
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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. |
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21 | * |
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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 | |
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28 | /*----- Header files ------------------------------------------------------*/ |
| 29 | |
| 30 | #include "group.h" |
| 31 | |
| 32 | /*----- Main code ---------------------------------------------------------*/ |
| 33 | |
| 34 | /* --- @group_readstring@ --- * |
| 35 | * |
| 36 | * Arguments: @group *g@ = an abstract group |
| 37 | * @ge *d@ = destination group element |
| 38 | * @const char *p@ = where the string is |
| 39 | * @char **end@ = where to put the end pointer |
| 40 | * |
| 41 | * Returns: Zero on success, nonzero on failure. |
| 42 | * |
| 43 | * Use: Parses a group element from a string. |
| 44 | */ |
| 45 | |
| 46 | int group_readstring(group *g, ge *d, const char *p, char **end) |
| 47 | { |
| 48 | mptext_stringctx ms; |
| 49 | |
| 50 | ms.buf = (/*unconst*/ char *)p; |
| 51 | ms.lim = (/*unconst*/ char *)p + strlen(p); |
| 52 | if (G_READ(g, d, &mptext_stringops, &ms)) |
| 53 | return (-1); |
| 54 | if (end) *end = ms.buf; |
| 55 | return (0); |
| 56 | } |
| 57 | |
| 58 | /* --- @group_writestring@ --- * |
| 59 | * |
| 60 | * Arguments: @group *g@ = an abstract group |
| 61 | * @ge *x@ = a group element |
| 62 | * @char *p@ = where the string should go |
| 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 string buffer. |
| 68 | */ |
| 69 | |
| 70 | int group_writestring(group *g, ge *x, char *p, size_t sz) |
| 71 | { |
| 72 | mptext_stringctx ms; |
| 73 | |
| 74 | ms.buf = p; |
| 75 | ms.lim = p + sz - 1; |
| 76 | if (G_WRITE(g, x, &mptext_stringops, &ms)) |
| 77 | return (-1); |
| 78 | *ms.buf = 0; |
| 79 | return (0); |
| 80 | } |
| 81 | |
| 82 | /*----- That's all, folks -------------------------------------------------*/ |
~mdw / catacomb / blame