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1 | /* -*-c-*- |
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2 | * |
| 3 | * Reading and writing large integers on strings |
| 4 | * |
| 5 | * (c) 1999 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 <mLib/dstr.h> |
| 31 | |
| 32 | #include "mptext.h" |
| 33 | |
| 34 | /*----- Main code ---------------------------------------------------------*/ |
| 35 | |
| 36 | /* --- Operations table --- */ |
| 37 | |
| 38 | static int get(void *p) |
| 39 | { |
| 40 | mptext_dstrctx *c = p; |
| 41 | if (c->i >= c->d->len) |
| 42 | return (EOF); |
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43 | return ((unsigned char)c->d->buf[c->i++]); |
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44 | } |
| 45 | |
| 46 | static void unget(int ch, void *p) |
| 47 | { |
| 48 | mptext_dstrctx *c = p; |
| 49 | if (ch == EOF || c->i == 0) |
| 50 | return; |
| 51 | c->i--; |
| 52 | } |
| 53 | |
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54 | static int put(const char *s, size_t sz, void *p) |
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55 | { |
| 56 | mptext_dstrctx *c = p; |
| 57 | DPUTM(c->d, s, sz); |
| 58 | return (0); |
| 59 | } |
| 60 | |
| 61 | const mptext_ops mptext_dstrops = { get, unget, put }; |
| 62 | |
| 63 | /* --- Convenience functions --- */ |
| 64 | |
| 65 | mp *mp_readdstr(mp *m, dstr *d, size_t *off, int radix) |
| 66 | { |
| 67 | mptext_dstrctx c; |
| 68 | c.d = d; |
| 69 | c.i = off ? *off : 0; |
| 70 | m = mp_read(m, radix, &mptext_dstrops, &c); |
| 71 | if (off) |
| 72 | *off = c.i; |
| 73 | return (m); |
| 74 | } |
| 75 | |
| 76 | int mp_writedstr(mp *m, dstr *d, int radix) |
| 77 | { |
| 78 | mptext_dstrctx c; |
| 79 | int rc; |
| 80 | c.d = d; |
| 81 | rc = mp_write(m, radix, &mptext_dstrops, &c); |
| 82 | DPUTZ(d); |
| 83 | return (rc); |
| 84 | } |
| 85 | |
| 86 | /*----- That's all, folks -------------------------------------------------*/ |
~mdw / catacomb / blame