diff options
Diffstat (limited to 'indra/llcommon/llendianswizzle.h')
| -rw-r--r-- | indra/llcommon/llendianswizzle.h | 112 |
1 files changed, 56 insertions, 56 deletions
diff --git a/indra/llcommon/llendianswizzle.h b/indra/llcommon/llendianswizzle.h index 4c08074a9c..d56eb7be2e 100644 --- a/indra/llcommon/llendianswizzle.h +++ b/indra/llcommon/llendianswizzle.h @@ -1,25 +1,25 @@ -/** +/** * @file llendianswizzle.h * @brief Functions for in-place bit swizzling * * $LicenseInfo:firstyear=2002&license=viewerlgpl$ * Second Life Viewer Source Code * Copyright (C) 2010, Linden Research, Inc. - * + * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; * version 2.1 of the License only. - * + * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. - * + * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - * + * * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA * $/LicenseInfo$ */ @@ -28,63 +28,63 @@ #define LL_LLENDIANSWIZZLE_H /* This function is intended to be used for in-place swizzling, particularly after fread() of - binary values from a file. Such as: - - numRead = fread(scale.mV, sizeof(float), 3, fp); - llendianswizzle(scale.mV, sizeof(float), 3); - - It assumes that the values in the file are LITTLE endian, so it's a no-op on a little endian machine. - - It keys off of typesize to do the correct swizzle, so make sure that typesize is the size of the native type. - - 64-bit types are not yet handled. + binary values from a file. Such as: + + numRead = fread(scale.mV, sizeof(float), 3, fp); + llendianswizzle(scale.mV, sizeof(float), 3); + + It assumes that the values in the file are LITTLE endian, so it's a no-op on a little endian machine. + + It keys off of typesize to do the correct swizzle, so make sure that typesize is the size of the native type. + + 64-bit types are not yet handled. */ #ifdef LL_LITTLE_ENDIAN - // little endian is native for most things. - inline void llendianswizzle(void *,int,int) - { - // Nothing to do - } + // little endian is native for most things. + inline void llendianswizzle(void *,int,int) + { + // Nothing to do + } #endif #ifdef LL_BIG_ENDIAN - // big endian requires a bit of work. - inline void llendianswizzle(void *p,int typesize, int count) - { - int i; - switch(typesize) - { - case 2: - { - U16 temp; - for(i=count ;i!=0 ;i--) - { - temp = ((U16*)p)[0]; - ((U16*)p)[0] = ((temp >> 8) & 0x000000FF) | ((temp << 8) & 0x0000FF00); - p = (void*)(((U16*)p) + 1); - } - } - break; - - case 4: - { - U32 temp; - for(i=count; i!=0; i--) - { - temp = ((U32*)p)[0]; - ((U32*)p)[0] = - ((temp >> 24) & 0x000000FF) | - ((temp >> 8) & 0x0000FF00) | - ((temp << 8) & 0x00FF0000) | - ((temp << 24) & 0xFF000000); - p = (void*)(((U32*)p) + 1); - } - } - break; - } - - } + // big endian requires a bit of work. + inline void llendianswizzle(void *p,int typesize, int count) + { + int i; + switch(typesize) + { + case 2: + { + U16 temp; + for(i=count ;i!=0 ;i--) + { + temp = ((U16*)p)[0]; + ((U16*)p)[0] = ((temp >> 8) & 0x000000FF) | ((temp << 8) & 0x0000FF00); + p = (void*)(((U16*)p) + 1); + } + } + break; + + case 4: + { + U32 temp; + for(i=count; i!=0; i--) + { + temp = ((U32*)p)[0]; + ((U32*)p)[0] = + ((temp >> 24) & 0x000000FF) | + ((temp >> 8) & 0x0000FF00) | + ((temp << 8) & 0x00FF0000) | + ((temp << 24) & 0xFF000000); + p = (void*)(((U32*)p) + 1); + } + } + break; + } + + } #endif // Use this when working with a single integral value you want swizzled |