/usr/include/linbox/util/formats/sparse-row.h is in liblinbox-dev 1.3.2-1.1build2.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 | /* Copyright (C) 2010 LinBox
*
*
*
* ========LICENCE========
* This file is part of the library LinBox.
*
* LinBox 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; either
* version 2.1 of the License, or (at your option) any later version.
*
* 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
* ========LICENCE========
*/
#ifndef __LINBOX_format_sparse_row_H
#define __LINBOX_format_sparse_row_H
/* sparse-row.h
* MatrixStreamReader specialization for matrices in the sparse row format:
* 1st line: "50 60 S" // #rows #cols letter-S
* Next lines: (# of entries in row) (column index of 1st entry) (value of 1st entry) ...
* One next line for each row in matrix.
*/
#include <cstdlib>
#if 0
namespace LinBox__FORMAT_SPARSE_ROW_H
{
static const char* name = "Sparse Row Format";
static const char* shortname = "sparserow";
}
#endif
namespace LinBox
{
template<class Field>
class SparseRowReader :public MatrixStreamReader<Field> {
public:
typedef typename MatrixStreamReader<Field>::Element Element;
private:
int _base;
size_t currentRow, colsLeft;
protected:
MatrixStreamError initImpl(const char* firstLine) {
char* restLine;
int i = 0;
// Read m
this->_m = strtoul(firstLine,&restLine,0);
if( this->_m == 0 && restLine == firstLine )
return NO_FORMAT;
i = int(restLine - firstLine);
// Read n
this->_n = strtoul(firstLine+i,&restLine,0);
if( this->_n == 0 && restLine == firstLine+i )
return NO_FORMAT;
i = int(restLine - firstLine);
// Read "S"
while( firstLine[i] && isspace(firstLine[i]) )
++i;
if( !firstLine[i] || (firstLine[i] != 'S' &&
firstLine[i] != 's' ) )
return NO_FORMAT;
// Check whitespace for rest of line
++i;
while( firstLine[i] && isspace(firstLine[i]) )
++i;
if( firstLine[i] ) return BAD_FORMAT;
this->knowM = this->knowN = true;
currentRow = (size_t) -1;
colsLeft = 0;
return GOOD;
}
MatrixStreamError nextTripleImpl( size_t& m, size_t& n, Element& v ) {
while( colsLeft == 0 ) {
if( ++currentRow == this->_m ) return END_OF_MATRIX;
this->ms->readWhiteSpace();
*(this->sin) >> colsLeft;
if( this->sin->eof() ) return END_OF_FILE;
if( !this->sin->good() ) return BAD_FORMAT;
}
this->ms->readWhiteSpace();
*(this->sin) >> n;
if( this->sin->eof() ) return END_OF_FILE;
if( !this->sin->good() ) return BAD_FORMAT;
this->ms->readWhiteSpace();
this->ms->getField().read(*(this->sin),v);
if( this->sin->eof() ) return END_OF_FILE;
if( !this->sin->good() ) return BAD_FORMAT;
n -= _base;
m = currentRow;
--colsLeft;
if( m >= this->_m ||
n >= this->_n ) return BAD_FORMAT;
return GOOD;
}
public:
SparseRowReader( int base = 0 ) {
_base = base;
currentRow = colsLeft = (size_t) -1;
}
const char* getName() const {return "Sparse Row Format"; }//LinBox__FORMAT_SPARSE_ROW_H::name;
const char* shortName() const
{ return "sparserow"; }//LinBox__FORMAT_SPARSE_ROW_H::shortname;
bool isSparse() const { return true; }
};
}
#endif // __LINBOX_format_sparse_row_H
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