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79 lines
2.0 KiB
C++
79 lines
2.0 KiB
C++
#ifndef MISC_STRINGOPS_H
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#define MISC_STRINGOPS_H
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#include <cctype>
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#include <string>
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#include <algorithm>
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#include <locale>
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namespace Misc
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{
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class StringUtils
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{
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static std::locale mLocale;
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struct ci
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{
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bool operator()(char x, char y) const {
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return std::tolower(x, StringUtils::mLocale) < std::tolower(y, StringUtils::mLocale);
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}
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};
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public:
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static bool ciLess(const std::string &x, const std::string &y) {
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return std::lexicographical_compare(x.begin(), x.end(), y.begin(), y.end(), ci());
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}
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static bool ciEqual(const std::string &x, const std::string &y) {
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if (x.size() != y.size()) {
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return false;
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}
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std::string::const_iterator xit = x.begin();
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std::string::const_iterator yit = y.begin();
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for (; xit != x.end(); ++xit, ++yit) {
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if (std::tolower(*xit, mLocale) != std::tolower(*yit, mLocale)) {
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return false;
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}
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}
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return true;
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}
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static int ciCompareLen(const std::string &x, const std::string &y, size_t len)
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{
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std::string::const_iterator xit = x.begin();
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std::string::const_iterator yit = y.begin();
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for(;xit != x.end() && yit != y.end() && len > 0;++xit,++yit,--len)
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{
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int res = *xit - *yit;
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if(res != 0 && std::tolower(*xit, mLocale) != std::tolower(*yit, mLocale))
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return (res > 0) ? 1 : -1;
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}
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if(len > 0)
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{
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if(xit != x.end())
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return 1;
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if(yit != y.end())
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return -1;
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}
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return 0;
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}
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/// Transforms input string to lower case w/o copy
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static std::string &toLower(std::string &inout) {
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for (unsigned int i=0; i<inout.size(); ++i)
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inout[i] = std::tolower(inout[i], mLocale);
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return inout;
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}
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/// Returns lower case copy of input string
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static std::string lowerCase(const std::string &in)
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{
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std::string out = in;
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return toLower(out);
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}
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};
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}
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#endif
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