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* new default precision "-1" means use the current stream precision
* otherwise, save and restore the stream precision
This commit is contained in:
Benoit Jacob 2009-08-13 22:50:55 -04:00
parent 99802094e4
commit 1d80f561ad
1 changed files with 5 additions and 4 deletions
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9
Eigen/src/Core/IO.h
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@ -33,7 +33,7 @@ enum { Raw, AlignCols };
* \brief Stores a set of parameters controlling the way matrices are printed * \brief Stores a set of parameters controlling the way matrices are printed
* *
* List of available parameters: * List of available parameters:
* - \b precision number of digits for floating point values * - \b precision number of digits for floating point values. The default value -1 means that the current stream precision is used.
* - \b flags can be either Raw (default) or AlignCols which aligns all the columns * - \b flags can be either Raw (default) or AlignCols which aligns all the columns
* - \b coeffSeparator string printed between two coefficients of the same row * - \b coeffSeparator string printed between two coefficients of the same row
* - \b rowSeparator string printed between two rows * - \b rowSeparator string printed between two rows
@ -50,7 +50,7 @@ enum { Raw, AlignCols };
struct IOFormat struct IOFormat
{ {
/** Default contructor, see class IOFormat for the meaning of the parameters */ /** Default contructor, see class IOFormat for the meaning of the parameters */
IOFormat(int _precision=4, int _flags=Raw, IOFormat(int _precision=-1, int _flags=Raw,
const std::string& _coeffSeparator = " ", const std::string& _coeffSeparator = " ",
const std::string& _rowSeparator = "\n", const std::string& _rowPrefix="", const std::string& _rowSuffix="", 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="")
@ -134,12 +134,12 @@ std::ostream & ei_print_matrix(std::ostream & s, const Derived& _m, const IOForm
for(int i = 0; i < m.rows(); ++i) for(int i = 0; i < m.rows(); ++i)
{ {
std::stringstream sstr; std::stringstream sstr;
sstr.precision(fmt.precision); if(fmt.precision != -1) sstr.precision(fmt.precision);
sstr << m.coeff(i,j); sstr << m.coeff(i,j);
width = std::max<int>(width, int(sstr.str().length())); width = std::max<int>(width, int(sstr.str().length()));
} }
} }
s.precision(fmt.precision); std::streamsize old_precision = s.precision(fmt.precision);
s << fmt.matPrefix; s << fmt.matPrefix;
for(int i = 0; i < m.rows(); ++i) for(int i = 0; i < m.rows(); ++i)
{ {
@ -159,6 +159,7 @@ std::ostream & ei_print_matrix(std::ostream & s, const Derived& _m, const IOForm
s << fmt.rowSeparator; s << fmt.rowSeparator;
} }
s << fmt.matSuffix; s << fmt.matSuffix;
s.precision(old_precision);
return s; return s;
} }