conv(3C) — sys5



CONV(3C)        DOMAIN/IX Reference Manual (SYS5)        CONV(3C)



NAME
     toupper, tolower, toupper, tolower, toascii - translate
     characters

USAGE
     #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 their 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.

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

     Toascii takes an argument, and returns it with all bits that
     are not part of a standard ASCII character turned off.

RELATED INFORMATION
     ctype(3C), getc(3S)










Printed 5/10/85                                            CONV-1
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