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81 lines
3.0 KiB
C++
81 lines
3.0 KiB
C++
/*
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* TextOperations.h, part of VCMI engine
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*
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* Authors: listed in file AUTHORS in main folder
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*
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* License: GNU General Public License v2.0 or later
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* Full text of license available in license.txt file, in main folder
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*
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*/
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#pragma once
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VCMI_LIB_NAMESPACE_BEGIN
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/// Namespace that provides utilites for unicode support (UTF-8)
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namespace TextOperations
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{
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/// returns 32-bit UTF codepoint for UTF-8 character symbol
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uint32_t DLL_LINKAGE getUnicodeCodepoint(const char *data, size_t maxSize);
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/// returns 32-bit UTF codepoint for character symbol in selected single-byte encoding
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uint32_t DLL_LINKAGE getUnicodeCodepoint(char data, const std::string & encoding );
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/// returns length (in bytes) of UTF-8 character starting from specified character
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size_t DLL_LINKAGE getUnicodeCharacterSize(char firstByte);
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/// test if character is a valid UTF-8 symbol
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/// maxSize - maximum number of bytes this symbol may consist from ( = remainer of string)
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bool DLL_LINKAGE isValidUnicodeCharacter(const char * character, size_t maxSize);
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/// returns true if text contains valid ASCII-string
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/// Note that since UTF-8 extends ASCII, any ASCII string is also UTF-8 string
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bool DLL_LINKAGE isValidASCII(const std::string & text);
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bool DLL_LINKAGE isValidASCII(const char * data, size_t size);
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/// test if text contains valid UTF-8 sequence
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bool DLL_LINKAGE isValidUnicodeString(const std::string & text);
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bool DLL_LINKAGE isValidUnicodeString(const char * data, size_t size);
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/// converts text to UTF-8 from specified encoding or from one specified in settings
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std::string DLL_LINKAGE toUnicode(const std::string & text, const std::string & encoding);
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/// converts text from unicode to specified encoding or to one specified in settings
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/// NOTE: usage of these functions should be avoided if possible
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std::string DLL_LINKAGE fromUnicode(const std::string & text, const std::string & encoding);
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///delete specified amount of UTF-8 characters from right
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DLL_LINKAGE void trimRightUnicode(std::string & text, size_t amount = 1);
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/// converts number into string using metric system prefixes, e.g. 'k' or 'M' to keep resulting strings within specified size
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/// Note that resulting string may have more symbols than digits: minus sign and prefix symbol
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template<typename Arithmetic>
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inline std::string formatMetric(Arithmetic number, int maxDigits);
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/// replaces all symbols that normally need escaping with appropriate escape sequences
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std::string escapeString(std::string input);
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};
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template<typename Arithmetic>
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inline std::string TextOperations::formatMetric(Arithmetic number, int maxDigits)
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{
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Arithmetic max = std::pow(10, maxDigits);
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if (std::abs(number) < max)
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return std::to_string(number);
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std::string symbols = " kMGTPE";
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auto iter = symbols.begin();
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while (std::abs(number) >= max)
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{
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number /= 1000;
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iter++;
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assert(iter != symbols.end());//should be enough even for int64
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}
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return std::to_string(number) + *iter;
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}
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VCMI_LIB_NAMESPACE_END
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