isgraph(3)                                                   isgraph(3)

  isgraph()

  NAME

    isgraph() - printing character test (space character exclusive)

  SYNOPSIS

    #include 

    int isgraph (int c)

  DESCRIPTION

    The isgraph(3) function tests whether c is a character of class graph in
    the program's current locale.

    In the POSIX locale, the character class graph includes all characters in
    the classes upper, lower, alpha, digit, xdigit, and punct. The character
    class graph excludes all characters in the cntrl class and the space
    character.

  RETURN VALUES

    The isgraph(3) function returns zero if the character tests false and
    returns non-zero if the character tests true.

  SEE ALSO

    isalnum(3)

    isalpha(3)

    isblank(3)

    iscntrl(3)

    isdigit(3)

    islower(3)

    isprint(3)

    ispunct(3)

    isspace(3)

    isupper(3)

    isxdigit(3)

    tolower(3)

    toupper(3)

  USAGE NOTES

    The isgraph function is thread safe.

    The isgraph function is not async-signal safe.