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/*
NrrdIO: stand-alone code for basic nrrd functionality
Copyright (C) 2008, 2007, 2006, 2005 Gordon Kindlmann
Copyright (C) 2004, 2003, 2002, 2001, 2000, 1999, 1998 University of Utah
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any
damages arising from the use of this software.
Permission is granted to anyone to use this software for any
purpose, including commercial applications, and to alter it and
redistribute it freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must
not claim that you wrote the original software. If you use this
software in a product, an acknowledgment in the product
documentation would be appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must
not be misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "NrrdIO.h"
void
_nrrdSwap16Endian(void *_data, size_t N) {
short *data, s, fix;
size_t I;
if (_data) {
data = (short *)_data;
for (I=0; I<N; I++) {
s = data[I];
fix = (s & 0x00FF);
fix = ((s & 0xFF00) >> 0x08) | (fix << 0x08);
data[I] = fix;
}
}
}
void
_nrrdSwap32Endian(void *_data, size_t N) {
int *data, w, fix;
size_t I;
if (_data) {
data = (int *)_data;
for (I=0; I<N; I++) {
w = data[I];
fix = (w & 0x000000FF);
fix = ((w & 0x0000FF00) >> 0x08) | (fix << 0x08);
fix = ((w & 0x00FF0000) >> 0x10) | (fix << 0x08);
fix = ((w & 0xFF000000) >> 0x18) | (fix << 0x08);
data[I] = fix;
}
}
}
void
_nrrdSwap64Endian(void *_data, size_t N) {
airLLong *data, l, fix;
size_t I;
if (_data) {
data = (airLLong *)_data;
for (I=0; I<N; I++) {
l = data[I];
fix = (l & 0x00000000000000FF);
fix = ((l & 0x000000000000FF00) >> 0x08) | (fix << 0x08);
fix = ((l & 0x0000000000FF0000) >> 0x10) | (fix << 0x08);
fix = ((l & 0x00000000FF000000) >> 0x18) | (fix << 0x08);
fix = ((l & AIR_LLONG(0x000000FF00000000)) >> 0x20) | (fix << 0x08);
fix = ((l & AIR_LLONG(0x0000FF0000000000)) >> 0x28) | (fix << 0x08);
fix = ((l & AIR_LLONG(0x00FF000000000000)) >> 0x30) | (fix << 0x08);
fix = ((l & AIR_LLONG(0xFF00000000000000)) >> 0x38) | (fix << 0x08);
data[I] = fix;
}
}
}
void
_nrrdNoopEndian(void *data, size_t N) {
AIR_UNUSED(data);
AIR_UNUSED(N);
return;
}
void
_nrrdBlockEndian(void *data, size_t N) {
char me[]="_nrrdBlockEndian";
AIR_UNUSED(data);
AIR_UNUSED(N);
fprintf(stderr, "%s: WARNING: can't fix endiannes of nrrd type %s\n", me,
airEnumStr(nrrdType, nrrdTypeBlock));
}
void
(*_nrrdSwapEndian[])(void *, size_t) = {
_nrrdNoopEndian, /* 0: nobody knows! */
_nrrdNoopEndian, /* 1: signed 1-byte integer */
_nrrdNoopEndian, /* 2: unsigned 1-byte integer */
_nrrdSwap16Endian, /* 3: signed 2-byte integer */
_nrrdSwap16Endian, /* 4: unsigned 2-byte integer */
_nrrdSwap32Endian, /* 5: signed 4-byte integer */
_nrrdSwap32Endian, /* 6: unsigned 4-byte integer */
_nrrdSwap64Endian, /* 7: signed 8-byte integer */
_nrrdSwap64Endian, /* 8: unsigned 8-byte integer */
_nrrdSwap32Endian, /* 9: 4-byte floating point */
_nrrdSwap64Endian, /* 10: 8-byte floating point */
_nrrdBlockEndian /* 11: size user defined at run time */
};
void
nrrdSwapEndian(Nrrd *nrrd) {
if (nrrd
&& nrrd->data
&& !airEnumValCheck(nrrdType, nrrd->type)) {
_nrrdSwapEndian[nrrd->type](nrrd->data, nrrdElementNumber(nrrd));
}
return;
}
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