tg2sip/libtgvoip/webrtc_dsp/absl/strings/string_view.cc

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Squashed 'libtgvoip/' changes from 6053cf5..cfd62e6 cfd62e6 Why did it change the OS X project 3a58a16 2.4.3 c4a48b3 Updated OS X project 564eada Fix #63 4f64e2e fixes 0c732e2 fixes 12e76ed better logging f015b79 Merge pull request #62 from xvitaly/big-endian a1df90f Set preferred audio session parameters on iOS 59a975b Fixes 8fd89fc Fixes, mic level testing and volume adjustment 243acfa Backported WebRTC upstream patch with Big Endian support. fed3bb7 Detect when proxy does not support UDP and persist that across calls a7546d4 Merge commit '6d03dd9ae4bf48d7344341cdd2d055ebd3a6a42e' into public 6d03dd9 version 69adf70 Use server config for APM + iOS crash fix 0b42ec8 Update iOS project f1b9e63 packet logging beeea45 I apparently still suck at C++ memory management 24fceba Update project 7f54b91 crash fix f85ce99 Save more data in data saving mode f4c4f79 Collect packet stats and accept json string for server config 78e584c New protocol version: optimized packet size 8cf9177 Fixed build on iOS 9dd089d fixed build on android 5caaaaf Updated WebRTC APM cc0cf35 fixed deadlock 02f4835 Rearranged VoIPController methods and added sections 912f73d Updated OS X project 39376df Fixed audio glitches on Windows dfe1f03 Updated project 81daf3f fix 296187a Merge pull request #58 from telegramdesktop/tdesktop 44956ac Merge pull request #57 from UnigramDev/public fb0a2b0 Fix build for Linux. d6cf1b7 Updated UWP wrapper 0f06289 Merge branch 'public' of github.com:grishka/libtgvoip into public dcfad91 Fix #54 162f447 Merge pull request #56 from telegramdesktop/tdesktop a7ee511 Merge remote-tracking branch 'origin/tdesktop' into HEAD 467b148 Removed unused files b1a0b3d 2.3 9b292fd Fix warning in Xcode 10. 8d8522a Merge pull request #53 from UnigramDev/public 646f7d6 Merge branch 'public' into public 14d782b Fixes 68acf59 Added GetSignalBarsCount and GetConnectionState to CXWrapper 761c586 Added GetStats to CXWrapper f643b02 Prevent crash if UWP WASAPI devices aren't found b2ac10e Fixed UWP project 9a1ec51 Fixed build for Windows Phone, fixed some warnings 4aea54f fix git-subtree-dir: libtgvoip git-subtree-split: cfd62e66a825348ac51f49e5d20bf8827fef7a38
2019-02-06 18:22:38 +00:00
// Copyright 2017 The Abseil Authors.
//
// 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 "absl/strings/string_view.h"
#ifndef ABSL_HAVE_STD_STRING_VIEW
#include <algorithm>
#include <climits>
#include <cstring>
#include <ostream>
#include "absl/strings/internal/memutil.h"
namespace absl {
namespace {
void WritePadding(std::ostream& o, size_t pad) {
char fill_buf[32];
memset(fill_buf, o.fill(), sizeof(fill_buf));
while (pad) {
size_t n = std::min(pad, sizeof(fill_buf));
o.write(fill_buf, n);
pad -= n;
}
}
class LookupTable {
public:
// For each character in wanted, sets the index corresponding
// to the ASCII code of that character. This is used by
// the find_.*_of methods below to tell whether or not a character is in
// the lookup table in constant time.
explicit LookupTable(string_view wanted) {
for (char c : wanted) {
table_[Index(c)] = true;
}
}
bool operator[](char c) const { return table_[Index(c)]; }
private:
static unsigned char Index(char c) { return static_cast<unsigned char>(c); }
bool table_[UCHAR_MAX + 1] = {};
};
} // namespace
std::ostream& operator<<(std::ostream& o, string_view piece) {
std::ostream::sentry sentry(o);
if (sentry) {
size_t lpad = 0;
size_t rpad = 0;
if (static_cast<size_t>(o.width()) > piece.size()) {
size_t pad = o.width() - piece.size();
if ((o.flags() & o.adjustfield) == o.left) {
rpad = pad;
} else {
lpad = pad;
}
}
if (lpad) WritePadding(o, lpad);
o.write(piece.data(), piece.size());
if (rpad) WritePadding(o, rpad);
o.width(0);
}
return o;
}
string_view::size_type string_view::copy(char* buf, size_type n,
size_type pos) const {
size_type ulen = length_;
assert(pos <= ulen);
size_type rlen = std::min(ulen - pos, n);
if (rlen > 0) {
const char* start = ptr_ + pos;
std::copy(start, start + rlen, buf);
}
return rlen;
}
string_view::size_type string_view::find(string_view s, size_type pos) const
noexcept {
if (empty() || pos > length_) {
if (empty() && pos == 0 && s.empty()) return 0;
return npos;
}
const char* result =
strings_internal::memmatch(ptr_ + pos, length_ - pos, s.ptr_, s.length_);
return result ? result - ptr_ : npos;
}
string_view::size_type string_view::find(char c, size_type pos) const noexcept {
if (empty() || pos >= length_) {
return npos;
}
const char* result =
static_cast<const char*>(memchr(ptr_ + pos, c, length_ - pos));
return result != nullptr ? result - ptr_ : npos;
}
string_view::size_type string_view::rfind(string_view s, size_type pos) const
noexcept {
if (length_ < s.length_) return npos;
if (s.empty()) return std::min(length_, pos);
const char* last = ptr_ + std::min(length_ - s.length_, pos) + s.length_;
const char* result = std::find_end(ptr_, last, s.ptr_, s.ptr_ + s.length_);
return result != last ? result - ptr_ : npos;
}
// Search range is [0..pos] inclusive. If pos == npos, search everything.
string_view::size_type string_view::rfind(char c, size_type pos) const
noexcept {
// Note: memrchr() is not available on Windows.
if (empty()) return npos;
for (size_type i = std::min(pos, length_ - 1);; --i) {
if (ptr_[i] == c) {
return i;
}
if (i == 0) break;
}
return npos;
}
string_view::size_type string_view::find_first_of(string_view s,
size_type pos) const
noexcept {
if (empty() || s.empty()) {
return npos;
}
// Avoid the cost of LookupTable() for a single-character search.
if (s.length_ == 1) return find_first_of(s.ptr_[0], pos);
LookupTable tbl(s);
for (size_type i = pos; i < length_; ++i) {
if (tbl[ptr_[i]]) {
return i;
}
}
return npos;
}
string_view::size_type string_view::find_first_not_of(string_view s,
size_type pos) const
noexcept {
if (empty()) return npos;
// Avoid the cost of LookupTable() for a single-character search.
if (s.length_ == 1) return find_first_not_of(s.ptr_[0], pos);
LookupTable tbl(s);
for (size_type i = pos; i < length_; ++i) {
if (!tbl[ptr_[i]]) {
return i;
}
}
return npos;
}
string_view::size_type string_view::find_first_not_of(char c,
size_type pos) const
noexcept {
if (empty()) return npos;
for (; pos < length_; ++pos) {
if (ptr_[pos] != c) {
return pos;
}
}
return npos;
}
string_view::size_type string_view::find_last_of(string_view s,
size_type pos) const noexcept {
if (empty() || s.empty()) return npos;
// Avoid the cost of LookupTable() for a single-character search.
if (s.length_ == 1) return find_last_of(s.ptr_[0], pos);
LookupTable tbl(s);
for (size_type i = std::min(pos, length_ - 1);; --i) {
if (tbl[ptr_[i]]) {
return i;
}
if (i == 0) break;
}
return npos;
}
string_view::size_type string_view::find_last_not_of(string_view s,
size_type pos) const
noexcept {
if (empty()) return npos;
size_type i = std::min(pos, length_ - 1);
if (s.empty()) return i;
// Avoid the cost of LookupTable() for a single-character search.
if (s.length_ == 1) return find_last_not_of(s.ptr_[0], pos);
LookupTable tbl(s);
for (;; --i) {
if (!tbl[ptr_[i]]) {
return i;
}
if (i == 0) break;
}
return npos;
}
string_view::size_type string_view::find_last_not_of(char c,
size_type pos) const
noexcept {
if (empty()) return npos;
size_type i = std::min(pos, length_ - 1);
for (;; --i) {
if (ptr_[i] != c) {
return i;
}
if (i == 0) break;
}
return npos;
}
// MSVC has non-standard behavior that implicitly creates definitions for static
// const members. These implicit definitions conflict with explicit out-of-class
// member definitions that are required by the C++ standard, resulting in
// LNK1169 "multiply defined" errors at link time. __declspec(selectany) asks
// MSVC to choose only one definition for the symbol it decorates. See details
// at http://msdn.microsoft.com/en-us/library/34h23df8(v=vs.100).aspx
#ifdef _MSC_VER
#define ABSL_STRING_VIEW_SELECTANY __declspec(selectany)
#else
#define ABSL_STRING_VIEW_SELECTANY
#endif
ABSL_STRING_VIEW_SELECTANY
constexpr string_view::size_type string_view::npos;
ABSL_STRING_VIEW_SELECTANY
constexpr string_view::size_type string_view::kMaxSize;
} // namespace absl
#endif // ABSL_HAVE_STD_STRING_VIEW