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