Home | History | Annotate | Download | only in memset 
      1 /*
      2  *
      3  *   Copyright (c) International Business Machines  Corp., 2002
      4  *
      5  *   This program is free software;  you can redistribute it and/or modify
      6  *   it under the terms of the GNU General Public License as published by
      7  *   the Free Software Foundation; either version 2 of the License, or
      8  *   (at your option) any later version.
      9  *
     10  *   This program is distributed in the hope that it will be useful,
     11  *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
     12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
     13  *   the GNU General Public License for more details.
     14  *
     15  *   You should have received a copy of the GNU General Public License
     16  *   along with this program;  if not, write to the Free Software
     17  *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
     18  */
     19 
     20 /* 01/02/2003	Port to LTP	avenkat (at) us.ibm.com */
     21 /* 06/30/2001	Port to Linux	nsharoff (at) us.ibm.com */
     22 
     23 /*
     24  * NAME
     25  *	memset1.c -- test setting of  buffer
     26  *
     27  * CALLS
     28  *	memset(3)
     29  *
     30  * ALGORITHM
     31  *	Check boundary conditions, go through 64 byte window.
     32  *
     33  * RESTRICTIONS
     34  */
     35 
     36 #include <stdio.h>
     37 #include <string.h>
     38 #include <unistd.h>
     39 #include <stdlib.h>
     40 #include <errno.h>
     41 
     42 #include "test.h"
     43 
     44 char *TCID = "memset01";
     45 
     46 #undef BSIZE
     47 #define BSIZE	4096
     48 #define LEN	100
     49 #define FAILED 0
     50 #define PASSED 1
     51 
     52 char buf[BSIZE];
     53 
     54 int local_flag = PASSED;
     55 int block_number;
     56 int TST_TOTAL = 1;
     57 
     58 void fill(void);
     59 int checkit(char *str);
     60 
     61 int main(int argc, char *argv[])
     62 {
     63 	register int i, j;
     64 	char *p;
     65 
     66 	tst_parse_opts(argc, argv, NULL, NULL);
     67 
     68 	local_flag = PASSED;
     69 
     70 	fill();
     71 
     72 	for (i = 0; i < 200; i++) {
     73 		fill();
     74 		p = &buf[400];
     75 		memset(p, 0, i);
     76 		if ((j = checkit(p)) != i) {
     77 			tst_resm(TINFO,
     78 				 "Not enough zero bytes, wanted %d, got %d", i,
     79 				 j);
     80 			local_flag = FAILED;
     81 			break;
     82 		}
     83 		if (!p[-1] || !p[i]) {
     84 			tst_resm(TINFO, "Boundary error, clear of %d", i);
     85 			local_flag = FAILED;
     86 		}
     87 		if (local_flag == FAILED)
     88 			break;
     89 	}
     90 
     91 	(local_flag == FAILED) ? tst_resm(TFAIL,
     92 					  "Test failed") : tst_resm(TPASS,
     93 								    "Test passed");
     94 	(local_flag == FAILED) ? tst_resm(TFAIL,
     95 					  "Test failed") : tst_resm(TPASS,
     96 								    "Test passed");
     97 	tst_exit();
     98 }
     99 
    100 void fill(void)
    101 {
    102 	register int i;
    103 	for (i = 0; i < BSIZE; i++)
    104 		buf[i] = 'a';
    105 }
    106 
    107 int checkit(char *str)
    108 {
    109 	register int i = 0;
    110 
    111 	while (!*str++)
    112 		i++;
    113 
    114 	return (i);
    115 }
    116