/*
 * Copyright (c) 2000 Silicon Graphics, Inc.  All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * Further, this software is distributed without any warranty that it is
 * free of the rightful claim of any third person regarding infringement
 * or the like.  Any license provided herein, whether implied or
 * otherwise, applies only to this software file.  Patent licenses, if
 * any, provided herein do not apply to combinations of this program with
 * other software, or any other product whatsoever.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
 * Mountain View, CA  94043, or:
 *
 * http://www.sgi.com
 *
 * For further information regarding this notice, see:
 *
 * http://oss.sgi.com/projects/GenInfo/NoticeExplan/
 */
#include <stdio.h>
#include <string.h>
#include "dataascii.h"

#define CHARS		"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghjiklmnopqrstuvwxyz\n"
#define CHARS_SIZE	sizeof(CHARS)

#ifdef UNIT_TEST
#include <stdlib.h>
#endif

static char Errmsg[80];

int dataasciigen(char *listofchars, char *buffer, int bsize, int offset)
{
	int cnt;
	int total;
	int ind;
	char *chr;
	int chars_size;
	char *charlist;

	chr = buffer;
	total = offset + bsize;

	if (listofchars == NULL) {
		charlist = CHARS;
		chars_size = CHARS_SIZE;
	} else {
		charlist = listofchars;
		chars_size = strlen(listofchars);
	}

	for (cnt = offset; cnt < total; cnt++) {
		ind = cnt % chars_size;
		*chr++ = charlist[ind];
	}

	return bsize;
}

int dataasciichk(char *listofchars, char *buffer, int bsize,
		 int offset, char **errmsg)
{
	int cnt;
	int total;
	int ind;
	char *chr;
	int chars_size;
	char *charlist;

	chr = buffer;
	total = offset + bsize;

	if (listofchars == NULL) {
		charlist = CHARS;
		chars_size = CHARS_SIZE;
	} else {
		charlist = listofchars;
		chars_size = strlen(listofchars);
	}

	if (errmsg != NULL)
		*errmsg = Errmsg;

	for (cnt = offset; cnt < total; chr++, cnt++) {
		ind = cnt % chars_size;
		if (*chr != charlist[ind]) {
			sprintf(Errmsg,
				"data mismatch at offset %d, exp:%#o, act:%#o",
				cnt, charlist[ind], *chr);
			return cnt;
		}
	}

	sprintf(Errmsg, "all %d bytes match desired pattern", bsize);
	return -1;
}

#if UNIT_TEST

int main(int ac, char **ag)
{

	int size = 1023;
	char *buffer;
	int ret;
	char *errmsg;

	buffer = malloc(size);
	if (buffer == NULL)
		perror("malloc");
		exit(2);
	}

	dataasciigen(NULL, buffer, size, 0);
	printf("dataasciigen(NULL, buffer, %d, 0)\n", size);

	ret = dataasciichk(NULL, buffer, size, 0, &errmsg);
	printf("dataasciichk(NULL, buffer, %d, 0, &errmsg) returned %d %s\n",
	       size, ret, errmsg);

	if (ret == -1)
		printf("\tPASS return value is -1 as expected\n");
	else
		printf("\tFAIL return value is %d, expected -1\n", ret);

	ret = dataasciichk(NULL, &buffer[1], size - 1, 1, &errmsg);
	printf("dataasciichk(NULL, &buffer[1], %d, 1, &errmsg) returned %d %s\n",
		size - 1, ret, errmsg);

	if (ret == -1)
		printf("\tPASS return value is -1 as expected\n");
	else
		printf("\tFAIL return value is %d, expected -1\n", ret);

	buffer[25] = 0x0;
	printf("changing char 25\n");

	ret = dataasciichk(NULL, &buffer[1], size - 1, 1, &errmsg);
	printf("dataasciichk(NULL, &buffer[1], %d, 1, &errmsg) returned %d %s\n",
		size - 1, ret, errmsg);

	if (ret == 25)
		printf("\tPASS return value is 25 as expected\n");
	else
		printf("\tFAIL return value is %d, expected 25\n", ret);

	dataasciigen("this is a test of the my string", buffer, size, 0);
	printf("dataasciigen(\"this is a test of the my string\", buffer, %d, 0)\n",
		size);

	ret = dataasciichk("this is a test of the my string",
			   buffer, size, 0, &errmsg);
	printf("dataasciichk(\"this is a test of the my string\", buffer, %d, 0, &errmsg) returned %d %s\n",
		size, ret, errmsg);

	if (ret == -1)
		printf("\tPASS return value is -1 as expected\n");
	else
		printf("\tFAIL return value is %d, expected -1\n", ret);

	ret =
	    dataasciichk("this is a test of the my string", &buffer[1],
			 size - 1, 1, &errmsg);
	printf("dataasciichk(\"this is a test of the my string\", &buffer[1], %d, 1, &errmsg) returned %d %s\n",
		size - 1, ret, errmsg);

	if (ret == -1)
		printf("\tPASS return value is -1 as expected\n");
	else
		printf("\tFAIL return value is %d, expected -1\n", ret);

	buffer[25] = 0x0;
	printf("changing char 25\n");

	ret = dataasciichk("this is a test of the my string", &buffer[1],
			   size - 1, 1, &errmsg);
	printf("dataasciichk(\"this is a test of the my string\", &buffer[1], %d, 1, &errmsg) returned %d %s\n",
		size - 1, ret, errmsg);

	if (ret == 25)
		printf("\tPASS return value is 25 as expected\n");
	else
		printf("\tFAIL return value is %d, expected 25\n", ret);

	exit(0);
}

#endif