File: printer_function_with_view_indentation.k

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#include <stdio.h>
#include "unpk.h"

void printer(char *s, uview v) {
    char c; int j;
    static indent=0;	/* static here, or static at file level */

    switch(v) {
    case v_left:	indent--; break;
    case v_right:	indent++; break;
    case v_nl:		putchar('\n');
			for (j=indent; j>0; j--) putchar('\t');
			break;
    default:		printf("%s", s); break;
}}