strncpy#

Synopsis#

#include <string.h>

char *stpncpy(char *restrict s1, const char *restrict s2, size_t n);

char *strncpy(char *restrict s1, const char *restrict s2, size_t n);

Status#

Partially implemented

Conformance#

IEEE Std 1003.1-2017

Description#

stpncpy() and strncpy() functions shall copy not more than n bytes (bytes that follow a NULL character are not copied) from the array pointed to by s2 to the array pointed to by s1.

If the array pointed to by s2 is a string that is shorter than n bytes, NULL characters shall be appended to the copy in the array pointed to by s1, until n bytes in all are written.

If copying takes place between objects that overlap, the behavior is undefined.

Return value#

If a NULL character is written to the destination, the stpncpy() function shall return the address of the first such NULL character. Otherwise, it shall return &s1[n].

The strncpy() function shall return s1.

No return values are reserved to indicate an error.

Errors#

No errors are defined.

Tests#

Untested

Known bugs#

None