isxdigit 918 maint/gnulib/lib/dfa.c {"xdigit", isxdigit, false}, isxdigit 3638 maint/gnulib/lib/regcomp.c BUILD_CHARCLASS_LOOP (isxdigit); isxdigit 50 maint/gnulib/tests/test-c-ctype.c ASSERT (c_isxdigit (c) == (isxdigit (c) != 0));