MangoHud/src/string_utils.h

#pragma once
#ifndef MANGOHUD_STRING_UTILS_H
#define MANGOHUD_STRING_UTILS_H

#include <string>
#include <vector>
#include <iomanip>
#include <iostream>
#include <sstream>
#include <algorithm>
#include <cctype>
#include <locale>
#include <cstring>

#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-function"

// https://stackoverflow.com/questions/216823/whats-the-best-way-to-trim-stdstring#217605
// trim from start (in place)
static inline void ltrim(std::string &s) {
    s.erase(s.begin(), std::find_if(s.begin(), s.end(), [](int ch) {
        return !std::isspace(ch);
    }));
}

// trim from end (in place)
static inline void rtrim(std::string &s) {
    s.erase(std::find_if(s.rbegin(), s.rend(), [](int ch) {
        return !std::isspace(ch);
    }).base(), s.end());
}

// trim from both ends (in place)
static inline void trim(std::string &s) {
    ltrim(s);
    rtrim(s);
}

// trim from start (copying)
static inline std::string ltrim_copy(std::string s) {
    ltrim(s);
    return s;
}

// trim from end (copying)
static inline std::string rtrim_copy(std::string s) {
    rtrim(s);
    return s;
}

// trim from both ends (copying)
static inline std::string trim_copy(std::string s) {
    trim(s);
    return s;
}

static bool starts_with(const std::string& s,  const char *t) {
    return s.rfind(t, 0) == 0;
}

static bool ends_with(const std::string& s,  const char *t, bool icase = false) {
    std::string s0(s);
    std::string s1(t);

    if (s0.size() < s1.size())
        return false;

    if (icase) {
        std::transform(s0.begin(), s0.end(), s0.begin(), ::tolower);
        std::transform(s1.begin(), s1.end(), s1.begin(), ::tolower);
    }

    size_t pos = s0.size() - s1.size();
    return (s0.rfind(s1, pos) == pos);
}

template<typename T>
static std::string itox(T i) {
    std::stringstream ss;
    ss << "0x"
        << std::setfill ('0') << std::setw(sizeof(T) * 2)
        << std::hex << i;
    return ss.str();
}

static bool try_stoi(int& val, const std::string& str)
{
    if (sscanf(str.c_str(), "%d", &val) == 1)
        return true;
    return false;
}

static bool try_stoull(unsigned long long& val, const std::string& str)
{
    if (sscanf(str.c_str(), "%llu", &val) == 1)
        return true;
    return false;
}

static float parse_float(const std::string& s, std::size_t* float_len = nullptr){
    std::stringstream ss(s);
    ss.imbue(std::locale::classic());
    float ret;
    ss >> ret;
    if(ss.fail()) throw std::invalid_argument("parse_float: Not a float");
    if(float_len != nullptr){
        auto pos = ss.tellg();
        if(ss.fail()) *float_len = s.size();
        else *float_len = pos;
    }
    return ret;
}

static std::vector<std::string> str_tokenize(const std::string& s, const std::string& delims = ",:+")
{
   std::vector<std::string> v;
   size_t old_n = 0, new_n = 0;

   while (old_n < s.size()){
      new_n = s.find_first_of(delims, old_n);
      auto c = s.substr(old_n, new_n - old_n);
      if (old_n != new_n)
         v.push_back(c);
      if (new_n == std::string::npos)
          break;
      old_n = new_n + 1;
   }
   return v;
}

static void trim_char(char* str) {
    if(!str)
        return;

    char* ptr = str;
    int len = strlen(ptr);

    while(len-1 > 0 && isspace(ptr[len-1]))
        ptr[--len] = 0;

    while(*ptr && isspace(*ptr))
        ++ptr, --len;

    memmove(str, ptr, len + 1);
}

#pragma GCC diagnostic pop

#endif //MANGOHUD_STRING_UTILS_H