00001 /* 00002 00003 Copyright (C) 2000, 2001 Silicon Graphics, Inc. All Rights Reserved. 00004 00005 This program is free software; you can redistribute it and/or modify it 00006 under the terms of version 2.1 of the GNU Lesser General Public License 00007 as published by the Free Software Foundation. 00008 00009 This program is distributed in the hope that it would be useful, but 00010 WITHOUT ANY WARRANTY; without even the implied warranty of 00011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 00012 00013 Further, this software is distributed without any warranty that it is 00014 free of the rightful claim of any third person regarding infringement 00015 or the like. Any license provided herein, whether implied or 00016 otherwise, applies only to this software file. Patent licenses, if 00017 any, provided herein do not apply to combinations of this program with 00018 other software, or any other product whatsoever. 00019 00020 You should have received a copy of the GNU Lesser General Public 00021 License along with this program; if not, write the Free Software 00022 Foundation, Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, 00023 USA. 00024 00025 Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pky, 00026 Mountain View, CA 94043, or: 00027 00028 http://www.sgi.com 00029 00030 For further information regarding this notice, see: 00031 00032 http://oss.sgi.com/projects/GenInfo/NoticeExplan 00033 00034 */ 00035 00036 00037 /* 00038 lebencodes64.c 00039 00040 $Revision: 1.1.1.1 $ 00041 $Date: 2005/10/21 19:00:00 $ 00042 00043 */ 00044 00045 #ifndef _LP64 00046 #include <sgidefs.h> 00047 #endif /* _LP64 */ 00048 #include <cmplrs/leb128.h> 00049 00050 00051 /* 00052 This routine encodes the given signed number in leb128 mode, 00053 and stores the bytes at address buffer. It returns the number 00054 of bytes in the encoding. It is the user's responsibility to 00055 make sure there is enough storage at buffer. The details of 00056 leb128 encoding are in the Dwarf document. 00057 00058 This relies on right shifting of negative values preserving 00059 the sign. Implementation defined according to ISO C. 00060 00061 10 bytes in buffer are all that is needed. 00062 */ 00063 int 00064 _leb128_signed_encode64(__int64_t number, char *buffer) 00065 { 00066 int sign; 00067 char *bufPtr; 00068 char byte; 00069 00070 sign = (number < 0) ? -1 : 0; 00071 bufPtr = buffer; 00072 00073 for(;;) { 00074 byte = (number & 0x7f); 00075 number >>= 7; 00076 00077 if (number == sign && (byte & 0x40) == ((char)sign & 0x40)) { 00078 *bufPtr = byte; 00079 bufPtr++; 00080 return bufPtr - buffer; 00081 } 00082 byte |= 0x80; 00083 *bufPtr = byte; 00084 bufPtr++; 00085 } 00086 00087 }
1.5.6