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/*
* Copyright (C) 2015 The Android Open Source Project
*
* 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.
*/
#include "android-base/strings.h"
#include "android-base/stringprintf.h"
#include <stdlib.h>
#include <string.h>
#include <string>
#include <vector>
// Wraps the posix version of strerror_r to make it available in translation units
// that define _GNU_SOURCE.
extern "C" int posix_strerror_r(int errnum, char* buf, size_t buflen);
namespace android {
namespace base {
#define CHECK_NE(a, b) \
if ((a) == (b)) abort();
std::vector<std::string> Split(const std::string& s,
const std::string& delimiters) {
CHECK_NE(delimiters.size(), 0U);
std::vector<std::string> result;
size_t base = 0;
size_t found;
while (true) {
found = s.find_first_of(delimiters, base);
result.push_back(s.substr(base, found - base));
if (found == s.npos) break;
base = found + 1;
}
return result;
}
std::vector<std::string> Tokenize(const std::string& s, const std::string& delimiters) {
CHECK_NE(delimiters.size(), 0U);
std::vector<std::string> result;
size_t end = 0;
while (true) {
size_t base = s.find_first_not_of(delimiters, end);
if (base == s.npos) {
break;
}
end = s.find_first_of(delimiters, base);
result.push_back(s.substr(base, end - base));
}
return result;
}
[[deprecated("Retained only for binary compatibility (symbol name)")]]
std::string Trim(const std::string& s) {
return Trim(std::string_view(s));
}
template std::string Trim(const char*&);
template std::string Trim(const char*&&);
template std::string Trim(const std::string&);
template std::string Trim(const std::string&&);
template std::string Trim(std::string_view&);
template std::string Trim(std::string_view&&);
// These cases are probably the norm, so we mark them extern in the header to
// aid compile time and binary size.
template std::string Join(const std::vector<std::string>&, char);
template std::string Join(const std::vector<const char*>&, char);
template std::string Join(const std::vector<std::string>&, const std::string&);
template std::string Join(const std::vector<const char*>&, const std::string&);
bool StartsWith(std::string_view s, std::string_view prefix) {
return s.substr(0, prefix.size()) == prefix;
}
bool StartsWith(std::string_view s, char prefix) {
return !s.empty() && s.front() == prefix;
}
bool StartsWithIgnoreCase(std::string_view s, std::string_view prefix) {
return s.size() >= prefix.size() && strncasecmp(s.data(), prefix.data(), prefix.size()) == 0;
}
bool EndsWith(std::string_view s, std::string_view suffix) {
return s.size() >= suffix.size() && s.substr(s.size() - suffix.size(), suffix.size()) == suffix;
}
bool EndsWith(std::string_view s, char suffix) {
return !s.empty() && s.back() == suffix;
}
bool EndsWithIgnoreCase(std::string_view s, std::string_view suffix) {
return s.size() >= suffix.size() &&
strncasecmp(s.data() + (s.size() - suffix.size()), suffix.data(), suffix.size()) == 0;
}
bool EqualsIgnoreCase(std::string_view lhs, std::string_view rhs) {
return lhs.size() == rhs.size() && strncasecmp(lhs.data(), rhs.data(), lhs.size()) == 0;
}
std::string StringReplace(std::string_view s, std::string_view from, std::string_view to,
bool all) {
if (from.empty()) return std::string(s);
std::string result;
std::string_view::size_type start_pos = 0;
do {
std::string_view::size_type pos = s.find(from, start_pos);
if (pos == std::string_view::npos) break;
result.append(s.data() + start_pos, pos - start_pos);
result.append(to.data(), to.size());
start_pos = pos + from.size();
} while (all);
result.append(s.data() + start_pos, s.size() - start_pos);
return result;
}
std::string ErrnoNumberAsString(int errnum) {
char buf[100];
buf[0] = '\0';
int strerror_err = posix_strerror_r(errnum, buf, sizeof(buf));
if (strerror_err < 0) {
return StringPrintf("Failed to convert errno %d to string: %d", errnum, strerror_err);
}
return buf;
}
} // namespace base
} // namespace android
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