StringUtil.hpp

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#pragma once
 
#include "AstGlobal.h"
#include "AstUtil/StringView.hpp"
#include "AstUtil/StringPosix.hpp"
#include "AstUtil/StringSplit.hpp"
#include <string>   // for std::string
#include <cctype>   // for isspace(), tolower(), toupper()
 
AST_NAMESPACE_BEGIN
 
bool aEqualsIgnoreCase(StringView piece1, StringView piece2) noexcept;
 
 
StringView aStripAsciiWhitespace(StringView str) noexcept;
 
 
StringView aStripTrailingAsciiWhitespace(StringView str) noexcept;
 
 
StringView aStripLeadingAsciiWhitespace(StringView str) noexcept;
 
 
std::string aAsciiStrToLower(StringView str);
 
 
std::string aAsciiStrToUpper(StringView str);
 
 
inline
bool aEqualsIgnoreCase(StringView piece1, StringView piece2) noexcept
{
    return piece1.size() == piece2.size() && (posix::strncasecmp(piece1.data(), piece2.data(), piece1.size()) == 0);
}
 
inline
StringView aStripAsciiWhitespace(StringView str) noexcept
{
    const char* begin = str.data();
    const char* end = begin + str.size();
    
    // Skip leading whitespace
    while (begin < end && std::isspace(static_cast<unsigned char>(*begin))) {
        ++begin;
    }
    
    // Skip trailing whitespace
    while (end > begin && std::isspace(static_cast<unsigned char>(*(end - 1)))) {
        --end;
    }
    
    return StringView(begin, static_cast<size_t>(end - begin));
}
 
inline
StringView aStripTrailingAsciiWhitespace(StringView str) noexcept
{
    const char* begin = str.data();
    const char* end = begin + str.size();
    
    // Skip trailing whitespace
    while (end > begin && std::isspace(static_cast<unsigned char>(*(end - 1)))) {
        --end;
    }
    
    return StringView(begin, static_cast<size_t>(end - begin));
}
 
inline
StringView aStripLeadingAsciiWhitespace(StringView str) noexcept
{
    const char* begin = str.data();
    const char* end = begin + str.size();
    
    // Skip leading whitespace
    while (begin < end && std::isspace(static_cast<unsigned char>(*begin))) {
        ++begin;
    }
    
    return StringView(begin, static_cast<size_t>(end - begin));
}
 
inline std::string aAsciiStrToLower(StringView sv)
{
    std::string str(sv);
    for (char& c : str) {
        c = std::tolower(static_cast<unsigned char>(c));
    }
    return str;
}
 
inline std::string aAsciiStrToUpper(StringView sv)
{
    std::string str(sv);
    for (char& c : str) {
        c = std::toupper(static_cast<unsigned char>(c));
    }
    return str;
}
 
AST_NAMESPACE_END