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Explicitly set fill character when printing aligned data to ostream

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This commit is contained in:
Eugene Zhulenev 2019-01-03 14:55:28 -08:00
parent bc5dd4cafd
commit 190d053e41
1 changed files with 18 additions and 4 deletions
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22
Eigen/src/Core/IO.h
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@ -41,6 +41,7 @@ std::ostream & print_matrix(std::ostream & s, const Derived& _m, const IOFormat&
* - \b rowSuffix string printed at the end of each row
* - \b matPrefix string printed at the beginning of the matrix
* - \b matSuffix string printed at the end of the matrix
* - \b fill character printed to fill the empty space in aligned columns
*
* Example: \include IOFormat.cpp
* Output: \verbinclude IOFormat.out
@ -53,9 +54,9 @@ struct IOFormat
IOFormat(int _precision = StreamPrecision, int _flags = 0,
const std::string& _coeffSeparator = " ",
const std::string& _rowSeparator = "\n", const std::string& _rowPrefix="", const std::string& _rowSuffix="",
const std::string& _matPrefix="", const std::string& _matSuffix="")
const std::string& _matPrefix="", const std::string& _matSuffix="", const char _fill=' ')
: matPrefix(_matPrefix), matSuffix(_matSuffix), rowPrefix(_rowPrefix), rowSuffix(_rowSuffix), rowSeparator(_rowSeparator),
rowSpacer(""), coeffSeparator(_coeffSeparator), precision(_precision), flags(_flags)
rowSpacer(""), coeffSeparator(_coeffSeparator), fill(_fill), precision(_precision), flags(_flags)
{
// TODO check if rowPrefix, rowSuffix or rowSeparator contains a newline
// don't add rowSpacer if columns are not to be aligned
@ -71,6 +72,7 @@ struct IOFormat
std::string matPrefix, matSuffix;
std::string rowPrefix, rowSuffix, rowSeparator, rowSpacer;
std::string coeffSeparator;
char fill;
int precision;
int flags;
};
@ -176,18 +178,26 @@ std::ostream & print_matrix(std::ostream & s, const Derived& _m, const IOFormat&
width = std::max<Index>(width, Index(sstr.str().length()));
}
}
std::streamsize old_width = s.width();
char old_fill_character = s.fill();
s << fmt.matPrefix;
for(Index i = 0; i < m.rows(); ++i)
{
if (i)
s << fmt.rowSpacer;
s << fmt.rowPrefix;
if(width) s.width(width);
if(width) {
s.fill(fmt.fill);
s.width(width);
}
s << m.coeff(i, 0);
for(Index j = 1; j < m.cols(); ++j)
{
s << fmt.coeffSeparator;
if (width) s.width(width);
if(width) {
s.fill(fmt.fill);
s.width(width);
}
s << m.coeff(i, j);
}
s << fmt.rowSuffix;
@ -196,6 +206,10 @@ std::ostream & print_matrix(std::ostream & s, const Derived& _m, const IOFormat&
}
s << fmt.matSuffix;
if(explicit_precision) s.precision(old_precision);
if(width) {
s.fill(old_fill_character);
s.width(old_width);
}
return s;
}