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kicad/common/base_units.cpp

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2012 CERN
* Copyright (C) 1992-2018 KiCad Developers, see change_log.txt for contributors.
*
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
/**
* @author Wayne Stambaugh <stambaughw@verizon.net>
* @file base_units.cpp
* @brief Code to handle objects that require both schematic and board internal units.
* @note This file is an ugly hack to solve the problem of formatting the base units
* for either schematics or boards in objects that are include in both domains.
* At some point in the future. This code should be rolled back into the
* appropriate object and build with the correct internal unit formatting
* depending on the application.
*/
#include <macros.h>
#include <base_struct.h>
#include <title_block.h>
#include <common.h>
#include <base_units.h>
#include "libeval/numeric_evaluator.h"
#if defined( PCBNEW ) || defined( CVPCB ) || defined( EESCHEMA ) || defined( GERBVIEW ) || defined( PL_EDITOR )
#define IU_TO_MM( x ) ( x / IU_PER_MM )
#define IU_TO_IN( x ) ( x / IU_PER_MILS / 1000 )
#define IU_TO_MILS( x ) ( x / IU_PER_MILS )
#define MM_TO_IU( x ) ( x * IU_PER_MM )
#define IN_TO_IU( x ) ( x * IU_PER_MILS * 1000 )
#define MILS_TO_IU( x ) ( x * IU_PER_MILS )
#else
#error "Cannot resolve internal units due to no definition of EESCHEMA, CVPCB or PCBNEW."
#endif
// Helper function to print a float number without using scientific notation
// and no trailing 0
// So we cannot always just use the %g or the %f format to print a fp number
// this helper function uses the %f format when needed, or %g when %f is
// not well working and then removes trailing 0
std::string Double2Str( double aValue )
{
char buf[50];
int len;
if( aValue != 0.0 && fabs( aValue ) <= 0.0001 )
{
// For these small values, %f works fine,
// and %g gives an exponent
len = sprintf( buf, "%.16f", aValue );
while( --len > 0 && buf[len] == '0' )
buf[len] = '\0';
if( buf[len] == '.' )
buf[len] = '\0';
else
++len;
}
else
{
// For these values, %g works fine, and sometimes %f
// gives a bad value (try aValue = 1.222222222222, with %.16f format!)
len = sprintf( buf, "%.16g", aValue );
}
return std::string( buf, len );
}
double To_User_Unit( EDA_UNITS_T aUnit, double aValue, bool aUseMils )
{
switch( aUnit )
{
case MILLIMETRES:
return IU_TO_MM( aValue );
case INCHES:
if( aUseMils )
return IU_TO_MILS( aValue );
else
return IU_TO_IN( aValue );
case DEGREES:
return aValue / 10.0f;
default:
return aValue;
}
}
/* Convert a value to a string using double notation.
* For readability, the mantissa has 0, 1, 3 or 4 digits, depending on units
* for unit = inch the mantissa has 3 digits (Eeschema) or 4 digits
* for unit = mil the mantissa has 0 digits (Eeschema) or 1 digits
* for unit = mm the mantissa has 3 digits (Eeschema) or 4 digits
* Should be used only to display info in status,
* but not in dialogs, because 4 digits only
* could truncate the actual value
*/
// A lower-precision (for readability) version of StringFromValue()
wxString MessageTextFromValue( EDA_UNITS_T aUnits, int aValue, bool aUseMils )
{
return MessageTextFromValue( aUnits, (double) aValue, aUseMils );
}
// A lower-precision (for readability) version of StringFromValue()
wxString MessageTextFromValue( EDA_UNITS_T aUnits, double aValue, bool aUseMils )
{
wxString text;
const wxChar* format;
double value = To_User_Unit( aUnits, aValue, aUseMils );
if( aUnits == INCHES )
{
if( aUseMils )
{
#if defined( EESCHEMA )
format = wxT( "%.0f" );
#else
format = wxT( "%.1f" );
#endif
}
else
{
#if defined( EESCHEMA )
format = wxT( "%.3f" );
#else
format = wxT( "%.4f" );
#endif
}
}
else
{
#if defined( EESCHEMA )
format = wxT( "%.2f" );
#else
format = wxT( "%.3f" );
#endif
}
text.Printf( format, value );
text += " ";
text += GetAbbreviatedUnitsLabel( aUnits, aUseMils );
return text;
}
/* Remove trailing 0 from a string containing a converted float number.
* the trailing 0 are removed if the mantissa has more
* than aTrailingZeroAllowed digits and some trailing 0
*/
void StripTrailingZeros( wxString& aStringValue, unsigned aTrailingZeroAllowed )
{
struct lconv * lc = localeconv();
char sep = lc->decimal_point[0];
unsigned sep_pos = aStringValue.Find( sep );
if( sep_pos > 0 )
{
// We want to keep at least aTrailingZeroAllowed digits after the separator
unsigned min_len = sep_pos + aTrailingZeroAllowed + 1;
while( aStringValue.Len() > min_len )
{
if( aStringValue.Last() == '0' )
aStringValue.RemoveLast();
else
break;
}
}
}
/* Convert a value to a string using double notation.
* For readability, the mantissa has 3 or more digits,
* the trailing 0 are removed if the mantissa has more than 3 digits
* and some trailing 0
* This function should be used to display values in dialogs because a value
* entered in mm (for instance 2.0 mm) could need up to 8 digits mantissa
* if displayed in inch to avoid truncation or rounding made just by the printf function.
* otherwise the actual value is rounded when read from dialog and converted
* in internal units, and therefore modified.
*/
wxString StringFromValue( EDA_UNITS_T aUnits, int aValue, bool aAddUnitSymbol, bool aUseMils )
{
double value_to_print = To_User_Unit( aUnits, aValue, aUseMils );
#if defined( EESCHEMA )
wxString stringValue = wxString::Format( wxT( "%.3f" ), value_to_print );
// Strip trailing zeros. However, keep at least 3 digits in mantissa
// For readability
StripTrailingZeros( stringValue, 3 );
#else
char buf[50];
int len;
if( value_to_print != 0.0 && fabs( value_to_print ) <= 0.0001 )
{
len = sprintf( buf, "%.10f", value_to_print );
while( --len > 0 && buf[len] == '0' )
buf[len] = '\0';
if( buf[len]=='.' || buf[len]==',' )
buf[len] = '\0';
else
++len;
}
else
{
if( aUnits == INCHES && aUseMils )
len = sprintf( buf, "%.7g", value_to_print );
else
len = sprintf( buf, "%.10g", value_to_print );
}
wxString stringValue( buf, wxConvUTF8 );
#endif
if( aAddUnitSymbol )
{
switch( aUnits )
{
case INCHES:
if( aUseMils )
stringValue += wxT( " mils" );
else
stringValue += wxT( " in" );
break;
case MILLIMETRES:
stringValue += wxT( " mm" );
break;
case DEGREES:
stringValue += wxT( " deg" );
break;
case UNSCALED_UNITS:
break;
}
}
return stringValue;
}
double From_User_Unit( EDA_UNITS_T aUnits, double aValue, bool aUseMils )
{
switch( aUnits )
{
case MILLIMETRES:
return MM_TO_IU( aValue );
case INCHES:
if( aUseMils )
return MILS_TO_IU( aValue );
else
return IN_TO_IU( aValue );
case DEGREES:
// Convert to "decidegrees"
return aValue * 10;
default:
case UNSCALED_UNITS:
return aValue;
}
}
double DoubleValueFromString( EDA_UNITS_T aUnits, const wxString& aTextValue, bool aUseMils )
{
double value;
double dtmp = 0;
// Acquire the 'right' decimal point separator
const struct lconv* lc = localeconv();
wxChar decimal_point = lc->decimal_point[0];
wxString buf( aTextValue.Strip( wxString::both ) );
// Convert the period in decimal point
buf.Replace( wxT( "." ), wxString( decimal_point, 1 ) );
// Find the end of the numeric part
unsigned brk_point = 0;
while( brk_point < buf.Len() )
{
wxChar ch = buf[brk_point];
if( !( (ch >= '0' && ch <='9') || (ch == decimal_point) || (ch == '-') || (ch == '+') ) )
{
break;
}
++brk_point;
}
// Extract the numeric part
buf.Left( brk_point );
buf.ToDouble( &dtmp );
// Check the optional unit designator (2 ch significant)
wxString unit( buf.Mid( brk_point ).Strip( wxString::leading ).Left( 2 ).Lower() );
if( aUnits == INCHES || aUnits == MILLIMETRES )
{
if( unit == wxT( "in" ) || unit == wxT( "\"" ) )
{
aUnits = INCHES;
aUseMils = false;
}
else if( unit == wxT( "mm" ) )
{
aUnits = MILLIMETRES;
}
else if( unit == wxT( "mi" ) || unit == wxT( "th" ) ) // "mils" or "thou"
{
aUnits = INCHES;
aUseMils = true;
}
}
else if( aUnits == DEGREES )
{
if( unit == wxT( "ra" ) ) // Radians
{
dtmp *= 180.0f / M_PI;
}
}
value = From_User_Unit( aUnits, dtmp, aUseMils );
return value;
}
void FetchUnitsFromString( const wxString& aTextValue, EDA_UNITS_T& aUnits, bool& aUseMils )
{
// Acquire the 'right' decimal point separator
const struct lconv* lc = localeconv();
wxChar decimal_point = lc->decimal_point[0];
wxString buf( aTextValue.Strip( wxString::both ) );
// Convert the period in decimal point
buf.Replace( wxT( "." ), wxString( decimal_point, 1 ) );
// Find the end of the numeric part
unsigned brk_point = 0;
while( brk_point < buf.Len() )
{
wxChar ch = buf[brk_point];
if( !( (ch >= '0' && ch <='9') || (ch == decimal_point) || (ch == '-') || (ch == '+') ) )
break;
++brk_point;
}
// Check the unit designator (2 ch significant)
wxString unit( buf.Mid( brk_point ).Strip( wxString::leading ).Left( 2 ).Lower() );
if( unit == wxT( "in" ) || unit == wxT( "\"" ) )
{
aUnits = INCHES;
aUseMils = false;
}
else if( unit == wxT( "mm" ) )
{
aUnits = MILLIMETRES;
}
else if( unit == wxT( "mi" ) || unit == wxT( "th" ) ) // "mils" or "thou"
{
aUnits = INCHES;
aUseMils = true;
}
else if( unit == wxT( "de" ) || unit == wxT( "ra" ) ) // "deg" or "rad"
{
aUnits = DEGREES;
}
}
int ValueFromString( EDA_UNITS_T aUnits, const wxString& aTextValue, bool aUseMils )
{
double value = DoubleValueFromString( aUnits, aTextValue, aUseMils );
return KiROUND( value );
}
/**
* Function AngleToStringDegrees
* is a helper to convert the \a double \a aAngle (in internal unit)
* to a string in degrees
*/
wxString AngleToStringDegrees( double aAngle )
{
wxString text;
text.Printf( wxT( "%.3f" ), aAngle/10.0 );
StripTrailingZeros( text, 1 );
return text;
}
wxString GetAbbreviatedUnitsLabel( EDA_UNITS_T aUnit, bool aUseMils )
{
switch( aUnit )
{
case INCHES:
if( aUseMils )
return _( "mils" );
else
return _( "in" );
case MILLIMETRES:
return _( "mm" );
case UNSCALED_UNITS:
return wxEmptyString;
case DEGREES:
return _( "deg" );
default:
return wxT( "??" );
}
}
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