tester.c

ReactOS是一些高手根据Windows XP的内核编写出的类XP。内核实现机理和API函数调用几乎相同。甚至可以兼容XP的程序。喜欢研究系统内核的人可以看一看。

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <Strn.h>

int main(int argc, char **argv)
{
	char a[8];
	char pad1[32];
	char *b;
	char c[37];
	char pad2[23];
	int i;
	int len1, len2;

	b = Strncpy(a, "hello", sizeof(a));
	b = Strncat(b, "world", sizeof(a));
	printf("1: result=[%s] should be=[%s]\n",
		b,
		"hellowo"
	);

	for (i=0; i<sizeof(c); i++)
		c[i] = 'X';
	b = Strncpy(c, "testing", sizeof(c) - 2);
#if (STRN_ZERO_PAD == 1)
	for (i=7; i<sizeof(c) - 2; i++) {
		if (c[i] != '\0') {
			printf("2: did not clear to end of buffer\n");
			break;
		}
	}
#endif
	for (i=sizeof(c) - 2; i<sizeof(c); i++) {
		if (c[i] != 'X') {
			printf("2: overwrote buffer\n");
			break;
		}
	}

	for (i=0; i<sizeof(c); i++)
		c[i] = 'X';
	b = Strncpy(c, "testing", sizeof(c) - 2);
	b = Strncat(b, " still", sizeof(c) - 2);
#if (STRN_ZERO_PAD == 1)
	for (i=13; i<sizeof(c) - 2; i++) {
		if (c[i] != '\0') {
			printf("3: did not clear to end of buffer\n");
			break;
		}
	}
#endif
	for (i=sizeof(c) - 2; i<sizeof(c); i++) {
		if (c[i] != 'X') {
			printf("3: overwrote buffer\n");
			break;
		}
	}

/*--------------*/

	b = Strnpcpy(a, "hello", sizeof(a));
	len1 = (int) (b - a);
	b = Strnpcat(a, "world", sizeof(a));
	len2 = (int) (b - a);
	printf("4: result=[%s] should be=[%s] len1=%d len2=%d\n",
		a,
		"hellowo",
		len1,
		len2
	);

	for (i=0; i<sizeof(c); i++)
		c[i] = 'X';
	b = Strnpcpy(c, "testing", sizeof(c) - 2);
#if (STRNP_ZERO_PAD == 1)
	for (i=7; i<sizeof(c) - 2; i++) {
		if (c[i] != '\0') {
			printf("5: did not clear to end of buffer\n");
			break;
		}
	}
#endif
	for (i=sizeof(c) - 2; i<sizeof(c); i++) {
		if (c[i] != 'X') {
			printf("5: overwrote buffer\n");
			break;
		}
	}

	for (i=0; i<sizeof(c); i++)
		c[i] = 'X';
	b = Strnpcpy(c, "testing", sizeof(c) - 2);
	b = Strnpcat(c, " still", sizeof(c) - 2);
#if (STRNP_ZERO_PAD == 1)
	for (i=13; i<sizeof(c) - 2; i++) {
		if (c[i] != '\0') {
			printf("6: did not clear to end of buffer\n");
			break;
		}
	}
#endif
	for (i=sizeof(c) - 2; i<sizeof(c); i++) {
		if (c[i] != 'X') {
			printf("6: overwrote buffer\n");
			break;
		}
	}

/*--------------*/
	{
		char *str;

		str = NULL;
		if (Dynscat(&str, "this is a test", 0) == NULL) {
			printf("7a: fail\n");
		} else if (strcmp(str, "this is a test") != 0) {
			printf("7b: fail\n");
		}
		free(str);

		str = NULL;
		if (Dynscat(&str, "this is a test", 0) == NULL) {
			printf("7c: fail\n");
		} else if (strcmp(str, "this is a test") != 0) {
			printf("7d: fail\n");
		} else if (Dynscat(&str, " ", "", "and", " ", "so is this", 0) == NULL) {
			printf("7e: fail\n");
		} else if (strcmp(str, "this is a test and so is this") != 0) {
			printf("7f: fail\n");
		}
		free(str);
	}
	exit(0);
}