stasis-aries-wal/test/lladd-old/strings.c

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---*/
/*********************************
 * $Id$
 *
 * testing with various strings
 * *******************************/
#include <assert.h>
#include "test.h"

#define VERBOSE 0
#define SEED 5095

int test() {
	int xid;
	int NUM_TRIALS=100;
	recordid rec;

	/* counters */
	int i;
	char c;

	/* used for making the random strings*/
	double r;
	int start, end;

	/* used to make a long string */	
	char first_printable_ascii = ' ';
	char last_printable_ascii = '~';
	int ascii_length = (int)(last_printable_ascii - first_printable_ascii);
	char *ASCII = (char *)malloc(sizeof(char) * ascii_length);

	/* an array of strings */
	char **strings = (char **)malloc(sizeof(char*) * NUM_TRIALS);

	/* output buffer */
	char *out_buffer = (char *)malloc(sizeof(char) * ascii_length);


	srand(SEED);

	/* create the long string from which random strings will be made */
	for (c = 0; c < ascii_length; c++) {
		ASCII[(int)c] = first_printable_ascii + c;
	}

	for (i = 0; i < NUM_TRIALS; i++) {

		r = ((double)rand()/(double)((double)RAND_MAX+1)); /* returns [0, 1)*/
		r = r*ascii_length;
		start = (int)r; /* an int in the rand [0, ascii_length) */
			
		r = ((double)rand()/(double)((double)RAND_MAX+1)); /* returns [0, 1)*/
		r = r*ascii_length;
		end = (int)r; /* an int in the rand [0, ascii_length) */
	
		if (start == end) {
			i--;
			continue;
		}

		if (end < start) {
			int swap = start;
			start = end;
			end = swap;
		}
		

		strings[i] = (char *)malloc(sizeof(char) * (end - start) + 1);
		strncpy(strings[i], ASCII + start, end-start);
		strings[i][end-start-1] = '\0'; /* make the string null terminated */
		
	}

	for (i = 0; i < NUM_TRIALS; i++) {
		xid = Tbegin();
		rec = Talloc(xid, sizeof(char)*(strlen(strings[i]) +1));
		Tset(xid, rec, strings[i]);

		Tread(xid, rec, out_buffer);
			
		if (VERBOSE) {
			printf("xid %d set rid (%d, %d) to [%s], and read [%s]\n", xid, rec.page, rec.slot, strings[i], out_buffer);
		}		
		assert(strcmp(strings[i], out_buffer) == 0); 
		Tcommit(xid);
	}
	
	return 0;
}