conv(3c)
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toupper, tolower, toupper, tolower, toascii
translate characters
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SYNTAX
#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.
The macros _toupper and _tolower, accomplish the same thing as
toupper and tolower, but they have restricted domains and are
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 turns off all bits in its argument that are not part of a
standard ASCII character; it is intended for compatibility with
other systems.
SEE ALSO
DG/UX 4.00 Page 1
Licensed material--property of copyright holder(s)
conv(3c)
ctype(3C), getc(3S).
DG/UX 4.00 Page 2
Licensed material--property of copyright holder(s)