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author | Mattias Andrée <maandree@operamail.com> | 2015-08-31 19:40:20 +0200 |
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committer | Mattias Andrée <maandree@operamail.com> | 2015-08-31 19:40:20 +0200 |
commit | d83903d9e26ec17604ebfb66f09adc9dd93fd02d (patch) | |
tree | 30e9e4189937cf1f5d73b0f381a498355631ba27 /src/wchar/wcsdup.c | |
parent | add strlen and wcslen (diff) | |
download | slibc-d83903d9e26ec17604ebfb66f09adc9dd93fd02d.tar.gz slibc-d83903d9e26ec17604ebfb66f09adc9dd93fd02d.tar.bz2 slibc-d83903d9e26ec17604ebfb66f09adc9dd93fd02d.tar.xz |
add memory copying functions
Signed-off-by: Mattias Andrée <maandree@operamail.com>
Diffstat (limited to '')
-rw-r--r-- | src/wchar/wcsdup.c | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/src/wchar/wcsdup.c b/src/wchar/wcsdup.c new file mode 100644 index 0000000..dbbbb4c --- /dev/null +++ b/src/wchar/wcsdup.c @@ -0,0 +1,82 @@ +/** + * slibc — Yet another C library + * Copyright © 2015 Mattias Andrée (maandree@member.fsf.org) + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ +#include <wchar.h> +#include <stddef.h> + + + +/** + * Duplicate a string. + * + * This is a GNU-compliant slibc extension. + * + * @param string The string to duplicate. + * @return The new string. `NULL` is returned on error + * and `errno` is set to indicate the error. + * + * @throws ENOMEM The process could not allocate sufficient amount of memory. + */ +wchar_t* wcsdup(const wchar_t* string) +{ + size_t n = wcslen(string) + 1; + wchar_t* r = malloc(n * sizeof(char)); + return r == NULL ? NULL : wmemcpy(r, string, n); +} + + +/** + * Duplicate a string. + * + * This is a slibc extension added for completeness. + * It is only available if GNU extensions are available. + * + * @param string The string to duplicate. + * @param maxlen Truncate the string to this length, if it is longer. + * A NUL wide character is guaranteed to always be + * written upon successful completion. + * @return The new string. `NULL` is returned on error + * and `errno` is set to indicate the error. + * + * @throws ENOMEM The process could not allocate sufficient amount of memory. + */ +wchar_t* wcsndup(const wchar_t* string, size_t maxlen) +{ + size_t n = wcsnlen(string, maxlen) + 1; + wchar_t* r = malloc(n * sizeof(wchar_t)); + return r == NULL ? NULL : wmemcpy(r, string, n); +} + + +/** + * Duplicate a memory segment. + * + * This is a slibc extension added for completeness. + * + * @param segment The memory segment to duplicate. + * @param size The size of the memory segment. + * @return The new segment. `NULL` is returned on error + * and `errno` is set to indicate the error. + * + * @throws ENOMEM The process could not allocate sufficient amount of memory. + */ +wchar_t* wmemdup(const wchar_t* segment, size_t size) +{ + wchar_t* r = malloc(size * sizeof(wchar_t)); + return r == NULL ? NULL : wmemcpy(r, segment, size); +} + |