ISDIGIT

    ISDIGIT         1038 modules/up/src/Core/gnu/regex.c        while (ISDIGIT (c))                                               \
    ISDIGIT         1508 modules/up/src/Core/gnu/regex.c                                 || (is_digit  && ISDIGIT (ch))
    ISDIGIT         1038 modules/up/src/gnug++/regex.c        while (ISDIGIT (c))                                                 \
    ISDIGIT         1508 modules/up/src/gnug++/regex.c                                 || (is_digit  && ISDIGIT (ch))