# cat test.c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
typedef struct _tag_tst_ {
int a;
char b;
} tst_t;
typedef struct _tag_buf_ {
int len;
char *ptr;
char ch;
} buf_t;
void
func_2(void)
{
buf_t *buf1 = NULL;
buf_t *buf2 = NULL;
int len = 10;
buf1 = (buf_t *)malloc(sizeof(buf_t));
if (NULL == buf1) {
printf("Error: malloc failed\n");
return;
}
buf1->len = len;
buf1->ptr = (char *)malloc(sizeof(char) * len);
if (NULL == buf1->ptr) {
printf("Error: malloc failed\n");
return;
}
strncpy(buf1->ptr, "Hello", buf1->len);
buf1->ch = 120;
printf("buf1 ptr: %s, len: %d, ch: %d\n", buf1->ptr, buf1->len, buf1->ch);
buf2 = (buf_t *)malloc(sizeof(buf_t));
if (NULL == buf2) {
printf("Error: malloc failed\n");
return;
}
buf2->len = len;
buf2->ptr = (char *)malloc(sizeof(char) * len);
if (NULL == buf2->ptr) {
printf("Error: malloc failed\n");
return;
}
*buf2 = *buf1;
free(buf1->ptr);
buf1->ptr = NULL;
free(buf1);
buf1 = NULL;
printf("buf2 ptr: %s, len: %d, ch: %d\n", buf2->ptr, buf2->len, buf2->ch);
free(buf2->ptr);
free(buf2);
}
void
func_1(void)
{
tst_t *t1 = NULL;
tst_t *t2 = NULL;
t1 = (tst_t *)malloc(sizeof(tst_t));
if (NULL == t1) {
printf("Error: malloc failed\n");
return ;
}
t1->a = 65530;
printf("*t1: %x, t1: %x, &t1: %x\n", *t1, t1, &t1);
t1->b = 120;
printf("t1->a: %d, t1->b: %d\n", t1->a, t1->b);
t2 = (tst_t *)malloc(sizeof(tst_t));
if (NULL == t2) {
printf("Error: malloc failed\n");
return;
}
*t2 = *t1;
free(t1);
t1 = NULL;
printf("*t2: %x, t2: %x, &t2: %x\n", *t2, t2, &t2);
printf("t2->a: %d, t2->b: %d\n", t2->a, t2->b);
free(t2);
}
int
main(int argc, char *const argv)
{
func_1();
func_2();
return 0;
}
Processed:
0.011, SQL:
9
