xref: /illumos-gate/usr/src/man/man3c/toupper.3c (revision 11cb6ef00e4913c161e88403c11c037fb2afab44)
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Copyright 2014 Garrett D'Amore <garrett@damore.org>
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TOUPPER 3C "Jun 21, 2014"
NAME
toupper, toupper_l - transliterate lower-case characters to upper-case
SYNOPSIS

#include <ctype.h>

int toupper(int c);

int toupper_l(int c, locale_t loc);
DESCRIPTION

The toupper() function has as a domain a type int, the value of which is representable as an unsigned char or the value of EOF. If the argument has any other value, the argument is returned unchanged. If the argument of toupper() represents a lower-case letter, and there exists a corresponding upper-case letter (as defined by character type information in the locale category LC_CTYPE), the result is the corresponding upper-case letter. All other arguments in the domain are returned unchanged.

The function toupper_l() behaves identically to toupper(), except instead of operating in the current locale, it operates in the locale specified by loc.

RETURN VALUES

On successful completion, toupper() returns the upper-case letter corresponding to the argument passed.

ERRORS

No errors are defined.

ATTRIBUTES

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE ATTRIBUTE VALUE
CSI Enabled
Interface Stability Standard
MT-Level MT-Safe
SEE ALSO

_toupper(3C), newlocale(3C), setlocale(3C), uselocale(3C), attributes(5), standards(5)