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NazaraEngine/src/Nazara/Core/Unicode.cpp

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// Copyright (C) 2017 Jérôme Leclercq
// This file is part of the "Nazara Engine - Core module"
// For conditions of distribution and use, see copyright notice in Config.hpp
#include <Nazara/Core/Unicode.hpp>
#include <Nazara/Core/Config.hpp>
#include <algorithm>
#include <iterator>
#include <Nazara/Core/Debug.hpp>
#if NAZARA_CORE_INCLUDE_UNICODEDATA
namespace Nz
{
struct UnicodeCharacter
{
UInt32 codepoint;
Unicode::Category category; // The type of the character
Unicode::Direction direction; // The reading way of the character
};
struct UnicodeSet
{
UInt32 firstCodepoint;
UInt32 lastCodepoint;
UnicodeCharacter character;
};
struct UnicodeCharacterSimpleMapping
{
UInt32 codepoint;
UInt32 character;
};
#include <Nazara/Core/UnicodeData.hpp>
namespace
{
const UnicodeCharacter* GetCharacter(Nz::UInt32 codepoint)
{
auto it = std::lower_bound(std::begin(unicodeCharacters), std::end(unicodeCharacters), codepoint, [](const UnicodeCharacter& character, Nz::UInt32 otherCodepoint) { return character.codepoint < otherCodepoint; });
if (it != std::end(unicodeCharacters) && it->codepoint == codepoint)
return &*it;
else
{
// Character is not part of the common character array, search in set
auto itSet = std::lower_bound(std::begin(unicodeSets), std::end(unicodeSets), codepoint, [](const UnicodeSet& character, Nz::UInt32 otherCodepoint) { return character.firstCodepoint < otherCodepoint; });
if (itSet != std::begin(unicodeSets))
{
--itSet;
if (itSet != std::end(unicodeSets) && codepoint >= itSet->firstCodepoint && codepoint <= itSet->lastCodepoint)
return &itSet->character;
}
}
return nullptr;
}
template<std::size_t N>
const UnicodeCharacterSimpleMapping* GetCharacterMapping(Nz::UInt32 codepoint, const UnicodeCharacterSimpleMapping(&mapping)[N])
{
auto it = std::lower_bound(std::begin(mapping), std::end(mapping), codepoint, [](const UnicodeCharacterSimpleMapping& character, Nz::UInt32 otherCodepoint) { return character.codepoint < otherCodepoint; });
if (it != std::end(mapping) && it->codepoint == codepoint)
return &*it;
else
return nullptr;
}
}
/*!
* \brief Gets the category of the character
* \return Unicode category
*
* \param character Character to get assignated category
*/
Unicode::Category Unicode::GetCategory(char32_t character)
{
if (const UnicodeCharacter* characterData = GetCharacter(character))
return characterData->category;
else
return Category_NoCategory;
}
/*!
* \brief Gets the direction of reading of the character
* \return Unicode direction
*
* \param character Character to get assignated direction
*/
Unicode::Direction Unicode::GetDirection(char32_t character)
{
if (const UnicodeCharacter* characterData = GetCharacter(character))
return characterData->direction;
else
return Direction_Boundary_Neutral;
}
/*!
* \brief Gets the lower case of the character
* \return Unicode lower
*
* \param character Character to get assignated lower case
*/
char32_t Unicode::GetLowercase(char32_t character)
{
if (const UnicodeCharacterSimpleMapping* characterMapping = GetCharacterMapping(character, unicodeLower))
return characterMapping->character;
else
return character;
}
/*!
* \brief Gets the title case of the character
* \return Unicode title
*
* \param character Character to get assignated title case
*/
char32_t Unicode::GetTitlecase(char32_t character)
{
if (const UnicodeCharacterSimpleMapping* characterMapping = GetCharacterMapping(character, unicodeTitle))
return characterMapping->character;
else
return character;
}
/*!
* \brief Gets the upper case of the character
* \return Unicode upper
*
* \param character Character to get assignated upper case
*/
char32_t Unicode::GetUppercase(char32_t character)
{
if (const UnicodeCharacterSimpleMapping* characterMapping = GetCharacterMapping(character, unicodeUpper))
return characterMapping->character;
else
return character;
}
}
#else // Implementation handling ASCII table
namespace Nz
{
/*!
* \ingroup core
* \class Nz::Unicode
* \brief Core class that represents a Unicode character
*/
/*!
* \brief Gets the category of the character
* \return Unicode category
*
* \param character Character to get assignated category
*/
Unicode::Category Unicode::GetCategory(char32_t character)
{
switch (character)
{
case '\x00':
case '\x01':
case '\x02':
case '\x03':
case '\x04':
case '\x05':
case '\x06':
case '\x07':
case '\x08':
case '\x09':
case '\x0A':
case '\x0B':
case '\x0C':
case '\x0D':
case '\x0E':
case '\x0F':
case '\x10':
case '\x11':
case '\x12':
case '\x13':
case '\x14':
case '\x15':
case '\x16':
case '\x17':
case '\x18':
case '\x19':
case '\x1A':
case '\x1B':
case '\x1C':
case '\x1D':
case '\x1E':
case '\x1F':
case '\x7F':
return Category_Other_Control;
case ' ':
return Category_Separator_Space;
case '!':
case '"':
case '#':
case '$':
case '%':
case '&':
case '\'':
case '*':
case ',':
case '.':
case '/':
case ':':
case ';':
case '?':
case '@':
case '\\':
return Category_Punctuation_Other;
case '(':
case '[':
case '{':
return Category_Punctuation_Open;
case ')':
case '}':
case ']':
return Category_Punctuation_Close;
case '+':
case '<':
case '=':
case '>':
case '|':
case '~':
return Category_Symbol_Math;
case '-':
return Category_Punctuation_Dash;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
return Category_Number_DecimalDigit;
case 'A':
case 'B':
case 'C':
case 'D':
case 'E':
case 'F':
case 'G':
case 'H':
case 'I':
case 'J':
case 'K':
case 'L':
case 'M':
case 'N':
case 'O':
case 'P':
case 'Q':
case 'R':
case 'S':
case 'T':
case 'U':
case 'V':
case 'W':
case 'X':
case 'Y':
case 'Z':
return Category_Letter_Uppercase;
case '_':
return Category_Punctuation_Connector;
case '^':
case '`':
return Category_Symbol_Modifier;
case 'a':
case 'b':
case 'c':
case 'd':
case 'e':
case 'f':
case 'g':
case 'h':
case 'i':
case 'j':
case 'k':
case 'l':
case 'm':
case 'n':
case 'o':
case 'p':
case 'q':
case 'r':
case 's':
case 't':
case 'u':
case 'v':
case 'w':
case 'x':
case 'y':
case 'z':
return Category_Letter_Lowercase;
default:
break;
}
return Category_NoCategory;
}
/*!
* \brief Gets the direction of reading of the character
* \return Unicode direction
*
* \param character Character to get assignated direction
*/
Unicode::Direction Unicode::GetDirection(char32_t character)
{
switch (character)
{
case '\x00':
case '\x01':
case '\x02':
case '\x03':
case '\x04':
case '\x05':
case '\x06':
case '\x07':
case '\x08':
case '\x0E':
case '\x0F':
case '\x10':
case '\x11':
case '\x12':
case '\x13':
case '\x14':
case '\x15':
case '\x16':
case '\x17':
case '\x18':
case '\x19':
case '\x1A':
case '\x1B':
case '\x7F':
return Direction_Boundary_Neutral;
case '\x09':
case '\x0B':
case '\x1F':
return Direction_Segment_Separator;
case '\x0A':
case '\x0D':
case '\x1C':
case '\x1D':
case '\x1E':
return Direction_Paragraph_Separator;
case '\x0C':
case ' ':
return Direction_White_Space;
case '!':
case '"':
case '&':
case '\'':
case '(':
case ')':
case '*':
case ';':
case '<':
case '=':
case '>':
case '?':
case '@':
case '[':
case '\\':
case ']':
case '^':
case '_':
case '`':
case '{':
case '|':
case '}':
case '~':
return Direction_Other_Neutral;
case '#':
case '$':
case '%':
return Direction_European_Terminator;
case '+':
case '-':
return Direction_European_Separator;
case ',':
case '.':
case '/':
case ':':
return Direction_Common_Separator;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
return Direction_European_Number;
case 'A':
case 'B':
case 'C':
case 'D':
case 'E':
case 'F':
case 'G':
case 'H':
case 'I':
case 'J':
case 'K':
case 'L':
case 'M':
case 'N':
case 'O':
case 'P':
case 'Q':
case 'R':
case 'S':
case 'T':
case 'U':
case 'V':
case 'W':
case 'X':
case 'Y':
case 'Z':
case 'a':
case 'b':
case 'c':
case 'd':
case 'e':
case 'f':
case 'g':
case 'h':
case 'i':
case 'j':
case 'k':
case 'l':
case 'm':
case 'n':
case 'o':
case 'p':
case 'q':
case 'r':
case 's':
case 't':
case 'u':
case 'v':
case 'w':
case 'x':
case 'y':
case 'z':
return Direction_Left_To_Right;
default:
break;
}
return Direction_Boundary_Neutral;
}
/*!
* \brief Gets the lower case of the character
* \return Unicode lower
*
* \param character Character to get assignated lower case
*
* \remark Only handling ASCII
*/
char32_t Unicode::GetLowercase(char32_t character)
{
if (character >= 'A' && character <= 'Z')
return character + ('a' - 'A');
else
return character;
}
/*!
* \brief Gets the title case of the character
* \return Unicode title
*
* \param character Character to get assignated title case
*
* \remark Only handling ASCII
*/
char32_t Unicode::GetTitlecase(char32_t character)
{
return GetUppercase(character);
}
/*!
* \brief Gets the upper case of the character
* \return Unicode upper
*
* \param character Character to get assignated upper case
*
* \remark Only handling ASCII
*/
char32_t Unicode::GetUppercase(char32_t character)
{
if (character >= 'a' && character <= 'z')
return character + ('A' - 'a');
else
return character;
}
}
#endif
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