File: memmove.c

package info (click to toggle)
python2.3 2.3.5-3sarge2
  • links: PTS
  • area: main
  • in suites: sarge
  • size: 43,908 kB
  • ctags: 81,384
  • sloc: ansic: 266,250; python: 246,028; makefile: 4,194; perl: 3,702; lisp: 3,630; sh: 2,576; xml: 1,601; objc: 740; cpp: 106; sed: 2
file content (25 lines) | stat: -rw-r--r-- 439 bytes parent folder | download | duplicates (13) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
 

/* A perhaps slow but I hope correct implementation of memmove */

extern char *memcpy(char *, char *, int);

char *
memmove(char *dst, char *src, int n)
{
	char *realdst = dst;
	if (n <= 0)
		return dst;
	if (src >= dst+n || dst >= src+n)
		return memcpy(dst, src, n);
	if (src > dst) {
		while (--n >= 0)
			*dst++ = *src++;
	}
	else if (src < dst) {
		src += n;
		dst += n;
		while (--n >= 0)
			*--dst = *--src;
	}
	return realdst;
}