contains.h

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  it under the terms of the GNU General Public License, version 2.0,
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*/
 
#ifndef ROUTER_SRC_REST_MRS_SRC_HELPER_STRING_CONTAINS_H_
#define ROUTER_SRC_REST_MRS_SRC_HELPER_STRING_CONTAINS_H_
 
#include <cstdint>
#include <cstring>
#include <string>
 
#include "helper/string/generic.h"
 
namespace helper {
 
template <typename String1, typename String2>
bool contains(const String1 &value, const String2 &sst) {
  using namespace helper::string;
  return nullptr != strstr(cstr(value), cstr(sst));
}
 
template <typename String1, typename String2>
bool icontains(const String1 &value, const String2 &sst) {
  auto sv = helper::string::size(value);
  auto ss = helper::string::size(sst);
 
  if (ss > sv) return false;
 
  auto serach_break_at = sv - ss;
 
  size_t found_chars = 0;
  for (size_t i = 0; i < sv && found_chars != ss; ++i) {
    if (!found_chars && (i > serach_break_at)) break;
 
    if (tolower(value[i]) == tolower(sst[found_chars])) {
      ++found_chars;
      continue;
    }
 
    found_chars = 0;
  }
 
  return found_chars == ss;
}
 
inline bool ends_with(const std::string &value, const std::string &sst) {
  if (sst.empty()) return false;
 
  auto pos = value.rfind(sst);
  if (value.npos == pos) return false;
  return value.length() - pos == sst.length();
}
 
template <typename String>
bool index(const std::string &value, const String &search_for, uint32_t *idx) {
  auto pos = value.find(search_for);
 
  if (value.npos == pos) return false;
  if (idx) *idx = static_cast<uint32_t>(pos);
 
  return true;
}
 
inline bool index(const char *value, const char *search_for, uint32_t *idx) {
  auto ptr = strstr(value, search_for);
  if (nullptr == ptr) return false;
  if (idx) *idx = static_cast<uint32_t>(std::distance(value, ptr));
  return true;
}
 
template <typename String1, typename String2>
bool starts_with(const String1 &value, const String2 &search_for) {
  using namespace helper::string;
  if (is_empty(search_for)) return false;
 
  uint32_t idx;
  if (index(value, search_for, &idx)) {
    return idx == 0;
  }
  return false;
}
 
}  // namespace helper
 
#endif  // ROUTER_SRC_REST_MRS_SRC_HELPER_STRING_CONTAINS_H_