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/**
* 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 <string.h>
#include <stddef.h>
/**
* Duplicate a string.
*
* @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.
*/
char* strdup(const char* string)
{
size_t n = strlen(string) + 1;
char* r = malloc(n * sizeof(char));
return r == NULL ? NULL : memcpy(r, string, n * sizeof(char));
}
/**
* Duplicate a string.
*
* This is a GNU extension.
*
* @param string The string to duplicate.
* @param maxlen Truncate the string to this length, if it is longer.
* A NUL byte 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.
*/
char* strndup(const char* string, size_t maxlen)
{
size_t n = strnlen(string, maxlen) + 1;
char* r = malloc(n * sizeof(char));
return r == NULL ? NULL : memcpy(r, string, n * sizeof(char));
}
/**
* Duplicate a memory segment.
*
* This is a slibc extension.
*
* @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.
*/
void* memdup(const void* segment, size_t size)
{
void* r = malloc(size);
return r == NULL ? NULL : memcpy(r, segment, size);
}
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