usr/klibc/strerror.c

/*
 * strerror.c
 */

#include <string.h>

char *strerror(int errnum)
{
	static char message[32] = "error ";	/* enough for error 2^63-1 */
	char numbuf[32];
	char *p;
	unsigned int e = (unsigned int)errnum;

#ifdef WITH_ERRLIST
	extern const int sys_nerr;
	extern const char *const sys_errlist[];

	if (e < (unsigned int)sys_nerr && sys_errlist[e])
		return (char *)sys_errlist[e];
#endif

	p = numbuf + sizeof numbuf;
	*--p = '\0';

	do {
		*--p = (e % 10) + '0';
		e /= 10;
	} while (e);

	memcpy(message + 6, p, (numbuf + sizeof numbuf) - p);

	return message;
}
1	/*
2	* strerror.c
3	*/
4
5	#include <string.h>
6
7	char *strerror(int errnum)
8	{
9	static char message[32] = "error "; /* enough for error 2^63-1 */
10	char numbuf[32];
11	char *p;
12	unsigned int e = (unsigned int)errnum;
13
14	#ifdef WITH_ERRLIST
15	extern const int sys_nerr;
16	extern const char *const sys_errlist[];
17
18	if (e < (unsigned int)sys_nerr && sys_errlist[e])
19	return (char *)sys_errlist[e];
20	#endif
21
22	p = numbuf + sizeof numbuf;
23	*--p = '\0';
24
25	do {
26	*--p = (e % 10) + '0';
27	e /= 10;
28	} while (e);
29
30	memcpy(message + 6, p, (numbuf + sizeof numbuf) - p);
31
32	return message;
33	}