5345f1df0d
We've needed this several times in the past. Change-Id: I7324e8083fe2ff1aa0bf392a8c124fc2f3bb26e2 Test: Full android build Signed-off-by: Casey Dahlin <sadmac@google.com>
104 lines
2.7 KiB
C++
104 lines
2.7 KiB
C++
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "base/strings.h"
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#include <stdlib.h>
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#include <string.h>
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#include <string>
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#include <vector>
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namespace android {
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namespace base {
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#define CHECK_NE(a, b) \
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if ((a) == (b)) abort();
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std::vector<std::string> Split(const std::string& s,
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const std::string& delimiters) {
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CHECK_NE(delimiters.size(), 0U);
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std::vector<std::string> result;
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size_t base = 0;
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size_t found;
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do {
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found = s.find_first_of(delimiters, base);
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result.push_back(s.substr(base, found - base));
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base = found + 1;
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} while (found != s.npos);
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return result;
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}
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std::string Trim(const std::string& s) {
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std::string result;
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if (s.size() == 0) {
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return result;
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}
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size_t start_index = 0;
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size_t end_index = s.size() - 1;
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// Skip initial whitespace.
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while (start_index < s.size()) {
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if (!isspace(s[start_index])) {
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break;
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}
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start_index++;
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}
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// Skip terminating whitespace.
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while (end_index >= start_index) {
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if (!isspace(s[end_index])) {
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break;
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}
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end_index--;
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}
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// All spaces, no beef.
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if (end_index < start_index) {
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return "";
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}
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// Start_index is the first non-space, end_index is the last one.
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return s.substr(start_index, end_index - start_index + 1);
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}
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// These cases are probably the norm, so we mark them extern in the header to
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// aid compile time and binary size.
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template std::string Join(const std::vector<std::string>&, char);
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template std::string Join(const std::vector<const char*>&, char);
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template std::string Join(const std::vector<std::string>&, const std::string&);
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template std::string Join(const std::vector<const char*>&, const std::string&);
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bool StartsWith(const std::string& s, const char* prefix) {
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return s.compare(0, strlen(prefix), prefix) == 0;
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}
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bool EndsWith(const std::string& s, const char* suffix) {
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size_t suffix_length = strlen(suffix);
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size_t string_length = s.size();
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if (suffix_length > string_length) {
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return false;
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}
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size_t offset = string_length - suffix_length;
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return s.compare(offset, suffix_length, suffix) == 0;
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}
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} // namespace base
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} // namespace android
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