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 Research 26 * 27 * internal representation conversion support 28 */ 29 30#include <ast.h> 31#include <swap.h> 32 33/* 34 * get int_n from b according to op 35 */ 36 37intmax_t 38swapget(int op, const void* b, int n) 39{ 40 register unsigned char* p; 41 register unsigned char* d; 42 intmax_t v; 43 unsigned char tmp[sizeof(intmax_t)]; 44 45 if (n > sizeof(intmax_t)) 46 n = sizeof(intmax_t); 47 if (op) swapmem(op, b, d = tmp, n); 48 else d = (unsigned char*)b; 49 p = d + n; 50 v = 0; 51 while (d < p) 52 { 53 v <<= CHAR_BIT; 54 v |= *d++; 55 } 56 return v; 57} 58