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/*
Teem: Tools to process and visualize scientific data and images
Copyright (C) 2011, 2010, 2009 University of Chicago
Copyright (C) 2008, 2007, 2006, 2005 Gordon Kindlmann
Copyright (C) 2004, 2003, 2002, 2001, 2000, 1999, 1998 University of Utah
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public License
(LGPL) as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The terms of redistributing and/or modifying this software also
include exceptions to the LGPL that facilitate static linking.
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 Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "nrrd.h"
#include "privateNrrd.h"
static FILE *_fileSave = NULL;
int
_nrrdEncodingAscii_available(void) {
return AIR_TRUE;
}
int
_nrrdEncodingAscii_read(FILE *file, void *_data, size_t elNum,
Nrrd *nrrd, NrrdIoState *nio) {
static const char me[]="_nrrdEncodingAscii_read";
char numbStr[AIR_STRLEN_HUGE]; /* HEY: fix this */
char *nstr;
size_t I;
char *data;
int tmp;
AIR_UNUSED(nio);
_fileSave = file;
if (nrrdTypeBlock == nrrd->type) {
biffAddf(NRRD, "%s: can't read nrrd type %s from %s", me,
airEnumStr(nrrdType, nrrdTypeBlock),
nrrdEncodingAscii->name);
return 1;
}
data = (char*)_data;
I = 0;
while (I < elNum) {
char stmp1[AIR_STRLEN_SMALL], stmp2[AIR_STRLEN_SMALL];
/* HEY: we can easily suffer here from a standard buffer overflow problem;
this was a source of a mysterious unu crash:
echo "0 0 0 0 1 0 0 0 0" \
| unu reshape -s 9 1 1 \
| unu pad -min 0 0 0 -max 8 8 8 \
| unu make -s 9 9 9 -t float -e ascii -ls 9 \
-spc LPS -orig "(0,0,0)" -dirs "(1,0,0) (0,1,0) (0,0,1)"
This particular case is resolved by changing AIR_STRLEN_HUGE
to AIR_STRLEN_HUGE*100, but the general problem remains. This
motivated adding the memory corruption test */
if (1 != fscanf(file, "%s", numbStr)) {
char stmp1[AIR_STRLEN_SMALL], stmp2[AIR_STRLEN_SMALL];
biffAddf(NRRD, "%s: couldn't parse element %s of %s", me,
airSprintSize_t(stmp1, I+1),
airSprintSize_t(stmp2, elNum));
return 1;
}
if (file != _fileSave) {
fprintf(stderr, "%s: PANIC memory corruption detected\n", me);
/* this may crash, hence the fprintf above to help debug */
biffAddf(NRRD, "%s: PANIC memory corruption detected", me);
return 1;
}
if (!strcmp(",", numbStr)) {
/* its an isolated comma, not a value, pass over this */
continue;
}
/* get past any commas prefixing a number (without space) */
nstr = numbStr + strspn(numbStr, ",");
if (nrrd->type >= nrrdTypeInt) {
/* sscanf supports putting value directly into this type */
if (1 != airSingleSscanf(nstr, nrrdTypePrintfStr[nrrd->type],
(void*)(data + I*nrrdElementSize(nrrd)))) {
biffAddf(NRRD, "%s: couldn't parse %s %s of %s (\"%s\")", me,
airEnumStr(nrrdType, nrrd->type),
airSprintSize_t(stmp1, I+1),
airSprintSize_t(stmp2, elNum), nstr);
return 1;
}
} else {
/* sscanf value into an int first */
if (1 != airSingleSscanf(nstr, "%d", &tmp)) {
biffAddf(NRRD, "%s: couldn't parse element %s of %s (\"%s\")", me,
airSprintSize_t(stmp1, I+1),
airSprintSize_t(stmp2, elNum), nstr);
return 1;
}
nrrdIInsert[nrrd->type](data, I, tmp);
}
I++;
}
return 0;
}
int
_nrrdEncodingAscii_write(FILE *file, const void *_data, size_t elNum,
const Nrrd *nrrd, NrrdIoState *nio) {
static const char me[]="_nrrdEncodingAscii_write";
char buff[AIR_STRLEN_MED];
size_t bufflen, linelen;
const char *data;
size_t I;
if (nrrdTypeBlock == nrrd->type) {
biffAddf(NRRD, "%s: can't write nrrd type %s to %s", me,
airEnumStr(nrrdType, nrrdTypeBlock),
nrrdEncodingAscii->name);
return 1;
}
data = (char*)_data;
linelen = 0;
for (I=0; I<elNum; I++) {
nrrdSprint[nrrd->type](buff, data);
if (1 == nrrd->dim) {
fprintf(file, "%s\n", buff);
} else if (nrrd->dim == 2
&& nrrd->axis[0].size <= nio->valsPerLine) {
fprintf(file, "%s%c", buff,
(I+1)%(nrrd->axis[0].size) ? ' ' : '\n');
} else {
bufflen = strlen(buff);
if (linelen+bufflen+1 <= nio->charsPerLine) {
fprintf(file, "%s%s", I ? " " : "", buff);
linelen += (I ? 1 : 0) + bufflen;
} else {
fprintf(file, "\n%s", buff);
linelen = bufflen;
}
}
data += nrrdElementSize(nrrd);
}
/* just to be sure, we always end with a carraige return */
fprintf(file, "\n");
return 0;
}
const NrrdEncoding
_nrrdEncodingAscii = {
"ASCII", /* name */
"ascii", /* suffix */
AIR_FALSE, /* endianMatters */
AIR_FALSE, /* isCompression */
_nrrdEncodingAscii_available,
_nrrdEncodingAscii_read,
_nrrdEncodingAscii_write
};
const NrrdEncoding *const
nrrdEncodingAscii = &_nrrdEncodingAscii;
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