CONV(3C)                COMMAND REFERENCE                CONV(3C)



NAME
     conv, toupper, tolower, _toupper, _tolower, toascii -
     translate characters

SYNOPSIS
     #include <ctype.h>

     int toupper (c)
     int c;

     int tolower (c)
     int c;

     int _toupper (c)
     int c;

     int _tolower (c)
     int c;

     int toascii (c)
     int c;

DESCRIPTION
     Toupper and tolower have as domain the range of getc(3s):
     the integers from -1 through 255.  If the argument of
     toupper represents a lowercase letter, the result is the
     corresponding uppercase letter.  If the argument of tolower
     represents an uppercase letter, the result is the
     corresponding lowercase letter.  All other arguments in the
     domain are returned unchanged.

     _toupper and _tolower are macros that accomplish the same
     thing as toupper and tolower but have restricted domains and
     are faster.  _toupper requires a lowercase letter as its
     argument; its result is the corresponding uppercase letter.
     _tolower requires an uppercase letter as its argument; its
     result is the corresponding lowercase letter.  Arguments
     outside the domain cause undefined results.

     Toascii yields its argument with all bits turned off that
     are not part of a standard ASCII character; it is intended
     for compatibility with other systems.

SEE ALSO
     ctype(3c) and stdio(3s).










Printed 3/13/89                                                 1

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