1/***********************************************************************
2*                                                                      *
3*               This software is part of the ast package               *
4*          Copyright (c) 1985-2011 AT&T Intellectual Property          *
5*                      and is licensed under the                       *
6*                 Eclipse Public License, Version 1.0                  *
7*                    by AT&T Intellectual Property                     *
8*                                                                      *
9*                A copy of the License is available at                 *
10*          http://www.eclipse.org/org/documents/epl-v10.html           *
11*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
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 * Glenn Fowler
25 * AT&T Bell Laboratories
26 *
27 * convert a 0 terminated character constant string to an int
28 */
29
30#include <ast.h>
31
32int
33chrtoi(register const char* s)
34{
35	register int	c;
36	register int	n;
37	register int	x;
38	char*		p;
39
40	c = 0;
41	for (n = 0; n < sizeof(int) * CHAR_BIT; n += CHAR_BIT)
42	{
43		switch (x = *((unsigned char*)s++))
44		{
45		case '\\':
46			x = chresc(s - 1, &p);
47			s = (const char*)p;
48			break;
49		case 0:
50			return(c);
51		}
52		c = (c << CHAR_BIT) | x;
53	}
54	return(c);
55}
56