HelenOS sources

CHAR_INVALID      164 common/str.c   #define CHAR_INVALID ((char32_t) UINT_MAX)
CHAR_INVALID      164 kernel/generic/common/str.c #define CHAR_INVALID ((char32_t) UINT_MAX)
CHAR_INVALID      164 uspace/lib/c/common/str.c #define CHAR_INVALID ((char32_t) UINT_MAX)