1da2e3ebdSchin /*********************************************************************** 2da2e3ebdSchin * * 3da2e3ebdSchin * This software is part of the ast package * 4*3e14f97fSRoger A. Faulkner * Copyright (c) 1985-2010 AT&T Intellectual Property * 5da2e3ebdSchin * and is licensed under the * 6da2e3ebdSchin * Common Public License, Version 1.0 * 77c2fbfb3SApril Chin * by AT&T Intellectual Property * 8da2e3ebdSchin * * 9da2e3ebdSchin * A copy of the License is available at * 10da2e3ebdSchin * http://www.opensource.org/licenses/cpl1.0.txt * 11da2e3ebdSchin * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 12da2e3ebdSchin * * 13da2e3ebdSchin * Information and Software Systems Research * 14da2e3ebdSchin * AT&T Research * 15da2e3ebdSchin * Florham Park NJ * 16da2e3ebdSchin * * 17da2e3ebdSchin * Glenn Fowler <gsf@research.att.com> * 18da2e3ebdSchin * David Korn <dgk@research.att.com> * 19da2e3ebdSchin * Phong Vo <kpv@research.att.com> * 20da2e3ebdSchin * * 21da2e3ebdSchin ***********************************************************************/ 22da2e3ebdSchin #pragma prototyped 23da2e3ebdSchin /* 24da2e3ebdSchin * Glenn Fowler 25da2e3ebdSchin * AT&T Research 26da2e3ebdSchin * 27da2e3ebdSchin * internal representation conversion support 28da2e3ebdSchin */ 29da2e3ebdSchin 30da2e3ebdSchin #include <ast.h> 31da2e3ebdSchin #include <swap.h> 32da2e3ebdSchin 33da2e3ebdSchin /* 34da2e3ebdSchin * get int_n from b according to op 35da2e3ebdSchin */ 36da2e3ebdSchin 37da2e3ebdSchin intmax_t swapget(int op,const void * b,int n)38da2e3ebdSchinswapget(int op, const void* b, int n) 39da2e3ebdSchin { 40da2e3ebdSchin register unsigned char* p; 41da2e3ebdSchin register unsigned char* d; 42da2e3ebdSchin intmax_t v; 43da2e3ebdSchin unsigned char tmp[sizeof(intmax_t)]; 44da2e3ebdSchin 45da2e3ebdSchin if (n > sizeof(intmax_t)) 46da2e3ebdSchin n = sizeof(intmax_t); 47da2e3ebdSchin if (op) swapmem(op, b, d = tmp, n); 48da2e3ebdSchin else d = (unsigned char*)b; 49da2e3ebdSchin p = d + n; 50da2e3ebdSchin v = 0; 51da2e3ebdSchin while (d < p) 52da2e3ebdSchin { 53da2e3ebdSchin v <<= CHAR_BIT; 54da2e3ebdSchin v |= *d++; 55da2e3ebdSchin } 56da2e3ebdSchin return v; 57da2e3ebdSchin } 58