Plan 9 from Bell Labs’s /usr/web/sources/plan9/sys/src/libc/port/toupper.c

Copyright © 2021 Plan 9 Foundation.
Distributed under the MIT License.
Download the Plan 9 distribution.


#include	<ctype.h>

int
toupper(int c)
{

	if(c < 'a' || c > 'z')
		return c;
	return _toupper(c);
}

int
tolower(int c)
{

	if(c < 'A' || c > 'Z')
		return c;
	return _tolower(c);
}

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