MYNT-EYE-S-SDK/src/internal/strings.cc

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2018-05-10 09:46:34 +03:00
// Copyright 2018 Slightech Co., Ltd. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
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#include "internal/strings.h"
#include <algorithm>
#include <cctype>
#include <exception>
#include <locale>
MYNTEYE_BEGIN_NAMESPACE
namespace strings {
namespace {
// The most elegant way to iterate the words of a string
// https://stackoverflow.com/questions/236129/the-most-elegant-way-to-iterate-the-words-of-a-string
template <class ContainerT>
void tokenize(
const std::string &str, ContainerT &tokens, // NOLINT
const std::string &delimiters = " ", bool trimEmpty = false) {
std::string::size_type pos, lastPos = 0, length = str.length();
using value_type = typename ContainerT::value_type;
using size_type = typename ContainerT::size_type;
while (lastPos < length + 1) {
pos = str.find_first_of(delimiters, lastPos);
if (pos == std::string::npos) {
pos = length;
}
if (pos != lastPos || !trimEmpty) {
tokens.push_back(
value_type(str.data() + lastPos, (size_type)pos - lastPos));
}
lastPos = pos + 1;
}
}
} // namespace
int hex2int(const std::string &text) {
try {
return std::stoi(text, nullptr, 16);
} catch (const std::exception &e) {
throw new strings_error("strings conversion error");
}
}
bool starts_with(const std::string &text, const std::string &prefix) {
return text.compare(0, prefix.length(), prefix) == 0;
}
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bool ends_with(const std::string &text, const std::string &suffix) {
if (suffix.length() > text.length())
return false;
return text.compare(
text.length() - suffix.length(), suffix.length(), suffix) == 0;
}
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std::vector<std::string> split(
const std::string &text, const std::string &delimiters) {
std::vector<std::string> tokens;
tokenize(text, tokens, delimiters);
return tokens;
}
// What's the best way to trim std::string?
// https://stackoverflow.com/questions/216823/whats-the-best-way-to-trim-stdstring
void ltrim(std::string &s) { // NOLINT
s.erase(s.begin(), std::find_if(s.begin(), s.end(), [](int ch) {
return !std::isspace(ch);
}));
}
void rtrim(std::string &s) { // NOLINT
s.erase(
std::find_if(
s.rbegin(), s.rend(), [](int ch) { return !std::isspace(ch); })
.base(),
s.end());
}
void trim(std::string &s) { // NOLINT
ltrim(s);
rtrim(s);
}
std::string trim_copy(const std::string &text) {
std::string s = text;
trim(s);
return s;
}
} // namespace strings
MYNTEYE_END_NAMESPACE