strndup.c File Reference

#include <stddef.h>
#include <stdlib.h>
#include <string.h>

Include dependency graph for strndup.c:

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Functions
char *	strndup (const char *str, size_t n)
	Duplicate n bytes of the passed in string str. More...

Function Documentation

strndup()

char* strndup	(	const char *	str,
		size_t	n
	)

Duplicate n bytes of the passed in string str.

strndup is similar to

See also

strdup, but copies at most n bytes. If str is longer than n, only n bytes are copied, and a terminating null byte ('\0') is added.

Parameters

str	a pointer to a string to duplicate
n	maximum number of bytes to copy

Returns

a pointer to the duplicated string on success. NULL if insufficient memory was available, with errno set to indicate cause of error.

Definition at line 41 of file strndup.c.

{
    char* copy = NULL;

    if(str && n)
    {
        size_t len;

        for(len = 0; len < n && str[len]; len++)
        {
        }

        if((copy = malloc(len + 1)) == NULL)
        {
            return (NULL);
        }

        memcpy(copy, str, len);
        copy[len] = '\0';
    }

    return copy;
}

References malloc(), memcpy(), and NULL.