[9286525] | 1 | /* append a string */ |
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[bd2e33a] | 2 | /* Copyright (c) Olly Betts 1999, 2014 |
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[846746e] | 3 | * |
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[89231c4] | 4 | * This program is free software; you can redistribute it and/or modify |
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| 5 | * it under the terms of the GNU General Public License as published by |
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| 6 | * the Free Software Foundation; either version 2 of the License, or |
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| 7 | * (at your option) any later version. |
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[846746e] | 8 | * |
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| 9 | * This program is distributed in the hope that it will be useful, |
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| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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[89231c4] | 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 12 | * GNU General Public License for more details. |
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[846746e] | 13 | * |
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[89231c4] | 14 | * You should have received a copy of the GNU General Public License |
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| 15 | * along with this program; if not, write to the Free Software |
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[ecbc6c18] | 16 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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[846746e] | 17 | */ |
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| 18 | |
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[99d5754] | 19 | #include <string.h> |
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| 20 | |
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| 21 | #include "osalloc.h" |
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[b6ea3c2] | 22 | #include "str.h" |
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[99d5754] | 23 | |
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| 24 | /* append a string */ |
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| 25 | void |
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| 26 | s_cat(char **pstr, int *plen, char *s) |
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| 27 | { |
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[bd2e33a] | 28 | s_cat_len(pstr, plen, s, strlen(s)); |
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| 29 | } |
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| 30 | |
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| 31 | /* append a string with length */ |
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| 32 | void |
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| 33 | s_cat_len(char **pstr, int *plen, char *s, int s_len) |
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| 34 | { |
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| 35 | int new_len = s_len + 1; /* extra 1 for nul */ |
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[99d5754] | 36 | int len = 0; |
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| 37 | |
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| 38 | if (*pstr) { |
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| 39 | len = strlen(*pstr); |
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| 40 | new_len += len; |
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| 41 | } |
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| 42 | |
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| 43 | if (!*pstr || new_len > *plen) { |
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| 44 | *plen = (new_len + 32) & ~3; |
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| 45 | *pstr = osrealloc(*pstr, *plen); |
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| 46 | } |
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[cb3d1e2] | 47 | |
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[bd2e33a] | 48 | memcpy(*pstr + len, s, s_len); |
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| 49 | (*pstr + len)[s_len] = '\0'; |
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[99d5754] | 50 | } |
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| 51 | |
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| 52 | /* append a character */ |
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| 53 | void |
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| 54 | s_catchar(char **pstr, int *plen, char ch) |
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| 55 | { |
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| 56 | int new_len = 2; /* extra 1 for nul */ |
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| 57 | int len = 0; |
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| 58 | |
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| 59 | if (*pstr) { |
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| 60 | len = strlen(*pstr); |
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| 61 | new_len += len; |
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| 62 | } |
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| 63 | |
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| 64 | if (!*pstr || new_len > *plen) { |
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| 65 | *plen = (new_len + 32) & ~3; |
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| 66 | *pstr = osrealloc(*pstr, *plen); |
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| 67 | } |
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[cb3d1e2] | 68 | |
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[99d5754] | 69 | (*pstr)[len] = ch; |
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| 70 | (*pstr)[len + 1] = '\0'; |
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| 71 | } |
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