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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"
#include "privateNrrd.h"
int
_nrrdEncodingRaw_available(void) {
return AIR_TRUE;
}
int
_nrrdEncodingRaw_read(FILE *file, void *data, size_t elementNum,
Nrrd *nrrd, NrrdIoState *nio) {
static const char me[]="_nrrdEncodingRaw_read";
size_t ret, bsize;
int fd, dio, car;
long savePos;
char *data_c;
size_t elementSize, maxChunkSize, remainderValue, chunkSize;
size_t retTmp;
bsize = nrrdElementSize(nrrd)*elementNum;
if (nio->format->usesDIO) {
fd = fileno(file);
dio = airDioTest(fd, data, bsize);
} else {
fd = -1;
dio = airNoDio_format;
}
if (airNoDio_okay == dio) {
if (2 <= nrrdStateVerboseIO) {
fprintf(stderr, "with direct I/O ... ");
}
ret = airDioRead(fd, data, bsize);
if (ret != bsize) {
biffAddf(NRRD, "%s: airDioRead got read only "
_AIR_SIZE_T_CNV " of " _AIR_SIZE_T_CNV " bytes "
"(%g%% of expected)", me,
ret, bsize, 100.0*ret/bsize);
return 1;
}
} else {
if (2 <= nrrdStateVerboseIO) {
if (AIR_DIO && nio->format->usesDIO) {
fprintf(stderr, "with fread(), not DIO: %s ...", airNoDioErr(dio));
}
}
/* HEY: There's a bug in fread/fwrite in gcc 4.2.1 (with SnowLeopard).
When it reads/writes a >=2GB data array, it pretends to succeed
(i.e. the return value is the right number) but it hasn't
actually read/written the data. The work-around is to loop
over the data, reading/writing 1GB (or smaller) chunks. */
ret = 0;
data_c = (char *)data;
elementSize = nrrdElementSize(nrrd);
maxChunkSize = 1024 * 1024 * 1024 / elementSize;
while(ret < elementNum) {
remainderValue = elementNum-ret;
if (remainderValue < maxChunkSize) {
chunkSize = remainderValue;
} else {
chunkSize = maxChunkSize;
}
retTmp =
fread(&(data_c[ret*elementSize]), elementSize, chunkSize, file);
ret += retTmp;
if (retTmp != chunkSize) {
biffAddf(NRRD, "%s: fread got read only "
_AIR_SIZE_T_CNV " " _AIR_SIZE_T_CNV "-sized things, not "
_AIR_SIZE_T_CNV " (%g%% of expected)", me,
ret, nrrdElementSize(nrrd), elementNum,
100.0*ret/elementNum);
return 1;
}
}
/* HEY: Here's the old version of the above code.
ret = fread(data, nrrdElementSize(nrrd), elementNum, file);
if (ret != elementNum) {
biffAddf(NRRD, "%s: fread got read only "
_AIR_SIZE_T_CNV " " _AIR_SIZE_T_CNV "-sized things, not "
_AIR_SIZE_T_CNV " (%g%% of expected)", me,
ret, nrrdElementSize(nrrd), elementNum,
100.0*ret/elementNum);
return 1;
}
*/
car = fgetc(file);
if (1 <= nrrdStateVerboseIO && EOF != car) {
fprintf(stderr, "%s: WARNING: finished reading raw data, "
"but file not at EOF\n", me);
ungetc(car, file);
}
if (2 <= nrrdStateVerboseIO && nio->byteSkip && stdin != file) {
savePos = ftell(file);
if (!fseek(file, 0, SEEK_END)) {
fprintf(stderr, "(%s: used %g%% of file for nrrd data)\n",
me, 100.0*bsize/(ftell(file) + 1));
fseek(file, savePos, SEEK_SET);
}
}
}
return 0;
}
int
_nrrdEncodingRaw_write(FILE *file, const void *data, size_t elementNum,
const Nrrd *nrrd, NrrdIoState *nio) {
static const char me[]="_nrrdEncodingRaw_write";
int fd, dio;
size_t ret, bsize;
char *data_c;
size_t elementSize, maxChunkSize, remainderValue, chunkSize;
size_t retTmp;
bsize = nrrdElementSize(nrrd)*elementNum;
if (nio->format->usesDIO) {
fd = fileno(file);
dio = airDioTest(fd, data, bsize);
} else {
fd = -1;
dio = airNoDio_format;
}
if (airNoDio_okay == dio) {
if (2 <= nrrdStateVerboseIO) {
fprintf(stderr, "with direct I/O ... ");
}
ret = airDioWrite(fd, data, bsize);
if (ret != bsize) {
biffAddf(NRRD, "%s: airDioWrite wrote only "
_AIR_SIZE_T_CNV " of " _AIR_SIZE_T_CNV " bytes "
"(%g%% of expected)", me,
ret, bsize, 100.0*ret/bsize);
return 1;
}
} else {
if (2 <= nrrdStateVerboseIO) {
if (AIR_DIO && nio->format->usesDIO) {
fprintf(stderr, "with fread(), not DIO: %s ...", airNoDioErr(dio));
}
}
/* HEY: There's a bug in fread/fwrite in gcc 4.2.1 (with SnowLeopard).
When it reads/writes a >=2GB data array, it pretends to succeed
(i.e. the return value is the right number) but it hasn't
actually read/written the data. The work-around is to loop
over the data, reading/writing 1GB (or smaller) chunks. */
ret = 0;
data_c = (char *)data;
elementSize = nrrdElementSize(nrrd);
maxChunkSize = 1024 * 1024 * 1024 / elementSize;
while(ret < elementNum) {
remainderValue = elementNum-ret;
if (remainderValue < maxChunkSize) {
chunkSize = remainderValue;
} else {
chunkSize = maxChunkSize;
}
retTmp =
fwrite(&(data_c[ret*elementSize]), elementSize, chunkSize, file);
ret += retTmp;
if (retTmp != chunkSize) {
biffAddf(NRRD, "%s: fwrite wrote only "
_AIR_SIZE_T_CNV " " _AIR_SIZE_T_CNV "-sized things, not "
_AIR_SIZE_T_CNV " (%g%% of expected)", me,
ret, nrrdElementSize(nrrd), elementNum,
100.0*ret/elementNum);
return 1;
}
}
/* HEY: Here's the old version of the above code.
ret = fwrite(data, nrrdElementSize(nrrd), elementNum, file);
if (ret != elementNum) {
biffAddf(NRRD, "%s: fwrite wrote only "
_AIR_SIZE_T_CNV " " _AIR_SIZE_T_CNV "-sized things, not "
_AIR_SIZE_T_CNV " (%g%% of expected)", me,
ret, nrrdElementSize(nrrd), elementNum,
100.0*ret/elementNum);
return 1;
}
*/
fflush(file);
/*
if (ferror(file)) {
biffAddf(NRRD, "%s: ferror returned non-zero", me);
return 1;
}
*/
}
return 0;
}
const NrrdEncoding
_nrrdEncodingRaw = {
"raw", /* name */
"raw", /* suffix */
AIR_TRUE, /* endianMatters */
AIR_FALSE, /* isCompression */
_nrrdEncodingRaw_available,
_nrrdEncodingRaw_read,
_nrrdEncodingRaw_write
};
const NrrdEncoding *const
nrrdEncodingRaw = &_nrrdEncodingRaw;
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