feat: finish string helper.
- finish Split() in string helper. - make complement to testbench test code.
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@ -4,6 +4,7 @@
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#include "EncodingHelper.hpp"
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#include <cstdio>
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#include <iostream>
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#include <string>
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namespace YYCC::IOHelper {
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@ -2,7 +2,7 @@
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#include "YYCCInternal.hpp"
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#if YYCC_OS == YYCC_OS_WINDOWS
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#include <string>
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#include <cstdio>
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namespace YYCC::IOHelper {
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@ -6,7 +6,5 @@ namespace YYCC::ParserHelper {
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bool Parse(const std::string& strl, int& ret, int base = 10);
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int Parse(const std::string& strl, int base = 10);
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bool ToString(int val, std::string& ret, int base = 10);
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std::string ToString(int val, int base = 10);
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}
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@ -98,7 +98,7 @@ namespace YYCC::StringHelper {
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const char* ret = iter->c_str();
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++iter;
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return ret;
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}, decilmer);
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}, decilmer);
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} else {
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auto iter = data.cbegin();
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auto stop = data.cend();
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@ -109,7 +109,7 @@ namespace YYCC::StringHelper {
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const char* ret = iter->c_str();
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++iter;
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return ret;
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}, decilmer);
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}, decilmer);
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}
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}
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@ -119,7 +119,7 @@ namespace YYCC::StringHelper {
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// https://en.cppreference.com/w/cpp/algorithm/transform
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// https://en.cppreference.com/w/cpp/string/byte/tolower
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std::transform(
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strl.cbegin(), strl.cend(), strl.begin(),
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strl.cbegin(), strl.cend(), strl.begin(),
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[](unsigned char c) -> char {
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if constexpr (bIsToLower) return std::tolower(c);
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else return std::toupper(c);
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@ -153,33 +153,30 @@ namespace YYCC::StringHelper {
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}
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std::vector<std::string> Split(const char* _strl, const char* _decilmer) {
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std::vector<std::string> elems;
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// Reference:
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// https://stackoverflow.com/questions/14265581/parse-split-a-string-in-c-using-string-delimiter-standard-c
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// check whether string and decilmer are nullptr
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std::string strl, decilmer;
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if (_strl == nullptr || _decilmer == nullptr)
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return elems;
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else {
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strl = _strl;
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decilmer = _decilmer;
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}
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// if no decilmer, return the whole string as the only one element of result.
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if (decilmer.empty()) {
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// prepare return value
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std::vector<std::string> elems;
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// if the string need to be splitted is nullptr, return empty result.
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if (_strl == nullptr) return elems;
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std::string strl(_strl);
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// if decilmer is nullptr, or decilmer is zero length, return original string
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std::string decilmer;
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if (_decilmer == nullptr || (decilmer = _decilmer, decilmer.empty())) {
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elems.push_back(strl);
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return elems;
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}
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// start spliting
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std::size_t previous = 0;
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std::size_t current = strl.find(decilmer.c_str());
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while (current != std::string::npos) {
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if (current >= previous) {
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elems.push_back(strl.substr(previous, current - previous));
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}
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std::size_t previous = 0, current;
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while ((current = strl.find(decilmer.c_str(), previous)) != std::string::npos) {
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elems.push_back(strl.substr(previous, current - previous));
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previous = current + decilmer.size();
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current = strl.find(decilmer, previous);
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}
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if (previous != strl.size()) {
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// try insert last part but prevent possible out of range exception
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if (previous <= strl.size()) {
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elems.push_back(strl.substr(previous));
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}
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return elems;
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@ -53,8 +53,10 @@ namespace YYCC::StringHelper {
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/**
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* @brief General Split function.
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* @param _strl
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* @param _decilmer
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* @param _strl[in] The string need to be splitting.
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* If this is nullptr, the result will be empty.
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* @param _decilmer[in] The decilmer for splitting.
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* If decilmer is nullptr or zero length, the result will only have 1 element which is original string.
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* @return
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* @remarks This function may be low performance because it just a homebrew Split functon.
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* It can works in most toy cases but not suit for high performance scenario.
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@ -3,6 +3,15 @@
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namespace Testbench {
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static void Assert(bool condition, const char* description) {
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if (condition) {
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YYCC::TerminalHelper::FPrintf(stdout, YYCC_TERMCOL_LIGHT_GREEN(u8"OK: %s\n"), description);
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} else {
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YYCC::TerminalHelper::FPrintf(stdout, YYCC_TERMCOL_LIGHT_RED(u8"Failed: %s\n"), description);
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std::abort();
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}
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}
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static void TerminalTestbench() {
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YYCC::TerminalHelper::EnsureTerminalUTF8(stdout);
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YYCC::TerminalHelper::FPuts(u8"你好世界\n", stdout);
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@ -11,22 +20,36 @@ namespace Testbench {
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}
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static void StringTestbench() {
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YYCC::TerminalHelper::FPuts(
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YYCC::StringHelper::Printf(u8"Translation: %s == %s\n", u8"Hello World", u8"你好世界").c_str(),
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stdout
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);
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auto test_printf = YYCC::StringHelper::Printf(u8"%s == %s", u8"Hello World", u8"你好世界");
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Assert(test_printf == u8"Hello World == 你好世界", "YYCC::StringHelper::Printf");
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auto test_lower = YYCC::StringHelper::Lower("LOWER");
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Assert(test_lower == "lower", "YYCC::StringHelper::Lower");
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auto test_upper = YYCC::StringHelper::Upper("upper");
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Assert(test_upper == "UPPER", "YYCC::StringHelper::Upper");
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std::string test_string(u8"UPPER -> lower\n");
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YYCC::TerminalHelper::FPuts(test_string.c_str(), stdout);
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YYCC::TerminalHelper::FPuts(YYCC::StringHelper::Lower(test_string.c_str()).c_str(), stdout);
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YYCC::TerminalHelper::FPuts(YYCC::StringHelper::Upper(test_string.c_str()).c_str(), stdout);
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std::vector<std::string> test_container {
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"test1", "test2", "test3", "test4"
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std::vector<std::string> test_join_container {
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"", "1", "2", ""
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};
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YYCC::TerminalHelper::FPuts(YYCC::StringHelper::Join(test_container, ", ").c_str(), stdout);
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std::string test_split(", 1, 3, 5, 7, 9, ");
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YYCC::TerminalHelper::FPuts(YYCC::StringHelper::Join(YYCC::StringHelper::Split(test_split.c_str(), ", "), " -> ").c_str(), stdout);
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auto test_join = YYCC::StringHelper::Join(test_join_container, ", ");
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Assert(test_join == ", 1, 2, ", "YYCC::StringHelper::Join");
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test_join = YYCC::StringHelper::Join(test_join_container, ", ", true);
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Assert(test_join == ", 2, 1, ", "YYCC::StringHelper::Join");
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auto test_split = YYCC::StringHelper::Split(", 1, 2, ", ", ");
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Assert(test_split.size() == 4u, "YYCC::StringHelper::Split");
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Assert(test_split[0] == "", "YYCC::StringHelper::Split");
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Assert(test_split[1] == "1", "YYCC::StringHelper::Split");
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Assert(test_split[2] == "2", "YYCC::StringHelper::Split");
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Assert(test_split[3] == "", "YYCC::StringHelper::Split");
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test_split = YYCC::StringHelper::Split("test", "-");
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Assert(test_split.size() == 1u, "YYCC::StringHelper::Split");
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Assert(test_split[0] == "test", "YYCC::StringHelper::Split");
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test_split = YYCC::StringHelper::Split("test", "");
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Assert(test_split.size() == 1u, "YYCC::StringHelper::Split");
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Assert(test_split[0] == "test", "YYCC::StringHelper::Split");
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}
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}
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