HelenOS sources
isdigit 37 boot/generic/include/macros.h #define isdigit(d) (((d) >= '0') && ((d) <= '9'))
isdigit 52 common/stdc/ctype.c int isdigit(int c)
isdigit 52 kernel/generic/common/stdc/ctype.c int isdigit(int c)
isdigit 104 kernel/generic/include/macros.h #define isdigit(d) (((d) >= '0') && ((d) <= '9'))
isdigit 52 uspace/lib/c/common/stdc/ctype.c int isdigit(int c)
isdigit 97 uspace/lib/cpp/include/__bits/locale/locale_misc.hpp bool isdigit(Char c, const locale& loc)
HelenOS homepage, sources at GitHub