1/***********************************************************************
2*                                                                      *
3*               This software is part of the ast package               *
4*          Copyright (c) 1985-2010 AT&T Intellectual Property          *
5*                      and is licensed under the                       *
6*                  Common Public License, Version 1.0                  *
7*                    by AT&T Intellectual Property                     *
8*                                                                      *
9*                A copy of the License is available at                 *
10*            http://www.opensource.org/licenses/cpl1.0.txt             *
11*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
12*                                                                      *
13*              Information and Software Systems Research               *
14*                            AT&T Research                             *
15*                           Florham Park NJ                            *
16*                                                                      *
17*                 Glenn Fowler <gsf@research.att.com>                  *
18*                  David Korn <dgk@research.att.com>                   *
19*                   Phong Vo <kpv@research.att.com>                    *
20*                                                                      *
21***********************************************************************/
22#pragma prototyped
23
24#include <ast.h>
25#include <ctype.h>
26
27/*
28 * version strcmp(3)
29 */
30
31int
32strvcmp(register const char* a, register const char* b)
33{
34	register unsigned long	na;
35	register unsigned long	nb;
36
37	for (;;)
38	{
39		if (isdigit(*a) && isdigit(*b))
40		{
41			na = nb = 0;
42			while (isdigit(*a))
43				na = na * 10 + *a++ - '0';
44			while (isdigit(*b))
45				nb = nb * 10 + *b++ - '0';
46			if (na < nb)
47				return -1;
48			if (na > nb)
49				return 1;
50		}
51		else if (*a != *b)
52			break;
53		else if (!*a)
54			return 0;
55		else
56		{
57			a++;
58			b++;
59		}
60	}
61	if (*a == 0)
62		return -1;
63	if (*b == 0)
64		return 1;
65	if (*a == '.')
66		return -1;
67	if (*b == '.')
68		return 1;
69	if (*a == '-')
70		return -1;
71	if (*b == '-')
72		return 1;
73	return *a < *b ? -1 : 1;
74}
75