git: 9front

ref: 69f0d8b299c2d5a61a0f866eed1bf49b9eb08b22
dir: /sys/src/cmd/unix/drawterm/libc/runestrchr.c/

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#include <u.h>
#include <libc.h>

Rune*
runestrchr(Rune *s, Rune c)
{
	Rune c0 = c;
	Rune c1;

	if(c == 0) {
		while(*s++)
			;
		return s-1;
	}

	while(c1 = *s++)
		if(c1 == c0)
			return s-1;
	return 0;
}