46 lines
1.3 KiB
C++
46 lines
1.3 KiB
C++
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#include <OpenMesh/Core/System/config.hh>
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#if defined(OM_CC_MIPS)
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# include <assert.h>
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#else
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# include <cassert>
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#endif
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#include "int2roman.hh"
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std::string int2roman( size_t decimal, size_t length )
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{
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assert( decimal > 0 && decimal < 1000 );
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const size_t nrows = 4;
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const size_t ncols = 4;
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static size_t table_arabs[ nrows ][ ncols ] = { { 1000, 1000, 1000, 1000 },
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{ 900, 500, 400, 100 },
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{ 90, 50, 40, 10 },
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{ 9, 5, 4, 1 } };
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static char *table_romans[ nrows ][ ncols ] = { { "M", "M", "M", "M" },
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{ "CM", "D", "CD", "C" },
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{ "XC", "L", "XL", "X" },
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{ "IX", "V", "IV", "I" } };
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size_t power; // power of ten
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size_t index; // Indexes thru values to subtract
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std::string roman;
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roman.reserve(length);
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roman[ 0 ] = '\0';
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for ( power = 0; power < nrows; power++ )
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for ( index = 0; index < ncols; index++ )
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while ( decimal >= table_arabs[ power ][ index ] )
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{
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roman += table_romans[ power ][ index ];
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decimal -= table_arabs[ power ][ index ];
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}
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return roman;
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}
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