Count the wide characters at the beginning of a string that aren't in a given character set
#include <wchar.h> size_t wcscspn( const wchar_t * ws1, const wchar_t * ws2 );
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The strspn() function returns the length of the initial segment of the string pointed to by ws1 consisting entirely of wide characters not from the string pointed to by ws2. The terminating NUL isn't considered to be part of ws2.
The length of the segment.
ANSI, POSIX 1003.1
memchr(), strchr(), strcspn(), strpbrk(), strrchr(), strspn(), strstr(), strtok(), strtok_r(), wcschr(), wcspbrk(), wcsrchr(), wcsspn(), wcsstr(), wcstok()