mirror of
https://github.com/danog/libtgvoip.git
synced 2024-12-02 17:51:06 +01:00
5caaaafa42
I'm now using the entire audio processing module from WebRTC as opposed to individual DSP algorithms pulled from there before. Seems to work better this way.
235 lines
7.4 KiB
C++
Executable File
235 lines
7.4 KiB
C++
Executable File
// Copyright 2017 The Abseil Authors.
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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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#include "absl/base/internal/raw_logging.h"
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#include <stddef.h>
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#include <cstdarg>
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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#include "absl/base/attributes.h"
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#include "absl/base/config.h"
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#include "absl/base/internal/atomic_hook.h"
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#include "absl/base/log_severity.h"
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// We know how to perform low-level writes to stderr in POSIX and Windows. For
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// these platforms, we define the token ABSL_LOW_LEVEL_WRITE_SUPPORTED.
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// Much of raw_logging.cc becomes a no-op when we can't output messages,
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// although a FATAL ABSL_RAW_LOG message will still abort the process.
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// ABSL_HAVE_POSIX_WRITE is defined when the platform provides posix write()
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// (as from unistd.h)
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//
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// This preprocessor token is also defined in raw_io.cc. If you need to copy
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// this, consider moving both to config.h instead.
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#if defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__) || \
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defined(__Fuchsia__) || defined(__native_client__)
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#include <unistd.h>
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#define ABSL_HAVE_POSIX_WRITE 1
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#define ABSL_LOW_LEVEL_WRITE_SUPPORTED 1
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#else
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#undef ABSL_HAVE_POSIX_WRITE
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#endif
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// ABSL_HAVE_SYSCALL_WRITE is defined when the platform provides the syscall
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// syscall(SYS_write, /*int*/ fd, /*char* */ buf, /*size_t*/ len);
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// for low level operations that want to avoid libc.
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#if (defined(__linux__) || defined(__FreeBSD__)) && !defined(__ANDROID__)
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#include <sys/syscall.h>
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#define ABSL_HAVE_SYSCALL_WRITE 1
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#define ABSL_LOW_LEVEL_WRITE_SUPPORTED 1
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#else
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#undef ABSL_HAVE_SYSCALL_WRITE
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#endif
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#ifdef _WIN32
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#include <io.h>
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#define ABSL_HAVE_RAW_IO 1
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#define ABSL_LOW_LEVEL_WRITE_SUPPORTED 1
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#else
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#undef ABSL_HAVE_RAW_IO
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#endif
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// TODO(gfalcon): We want raw-logging to work on as many platforms as possible.
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// Explicitly #error out when not ABSL_LOW_LEVEL_WRITE_SUPPORTED, except for a
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// whitelisted set of platforms for which we expect not to be able to raw log.
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ABSL_CONST_INIT static absl::base_internal::AtomicHook<
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absl::raw_logging_internal::LogPrefixHook> log_prefix_hook;
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ABSL_CONST_INIT static absl::base_internal::AtomicHook<
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absl::raw_logging_internal::AbortHook> abort_hook;
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#ifdef ABSL_LOW_LEVEL_WRITE_SUPPORTED
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static const char kTruncated[] = " ... (message truncated)\n";
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// sprintf the format to the buffer, adjusting *buf and *size to reflect the
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// consumed bytes, and return whether the message fit without truncation. If
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// truncation occurred, if possible leave room in the buffer for the message
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// kTruncated[].
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inline static bool VADoRawLog(char** buf, int* size, const char* format,
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va_list ap) ABSL_PRINTF_ATTRIBUTE(3, 0);
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inline static bool VADoRawLog(char** buf, int* size,
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const char* format, va_list ap) {
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int n = vsnprintf(*buf, *size, format, ap);
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bool result = true;
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if (n < 0 || n > *size) {
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result = false;
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if (static_cast<size_t>(*size) > sizeof(kTruncated)) {
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n = *size - sizeof(kTruncated); // room for truncation message
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} else {
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n = 0; // no room for truncation message
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}
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}
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*size -= n;
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*buf += n;
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return result;
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}
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#endif // ABSL_LOW_LEVEL_WRITE_SUPPORTED
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static constexpr int kLogBufSize = 3000;
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namespace {
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// CAVEAT: vsnprintf called from *DoRawLog below has some (exotic) code paths
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// that invoke malloc() and getenv() that might acquire some locks.
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// Helper for RawLog below.
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// *DoRawLog writes to *buf of *size and move them past the written portion.
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// It returns true iff there was no overflow or error.
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bool DoRawLog(char** buf, int* size, const char* format, ...)
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ABSL_PRINTF_ATTRIBUTE(3, 4);
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bool DoRawLog(char** buf, int* size, const char* format, ...) {
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va_list ap;
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va_start(ap, format);
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int n = vsnprintf(*buf, *size, format, ap);
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va_end(ap);
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if (n < 0 || n > *size) return false;
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*size -= n;
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*buf += n;
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return true;
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}
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void RawLogVA(absl::LogSeverity severity, const char* file, int line,
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const char* format, va_list ap) ABSL_PRINTF_ATTRIBUTE(4, 0);
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void RawLogVA(absl::LogSeverity severity, const char* file, int line,
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const char* format, va_list ap) {
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char buffer[kLogBufSize];
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char* buf = buffer;
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int size = sizeof(buffer);
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#ifdef ABSL_LOW_LEVEL_WRITE_SUPPORTED
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bool enabled = true;
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#else
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bool enabled = false;
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#endif
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#ifdef ABSL_MIN_LOG_LEVEL
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if (severity < static_cast<absl::LogSeverity>(ABSL_MIN_LOG_LEVEL) &&
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severity < absl::LogSeverity::kFatal) {
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enabled = false;
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}
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#endif
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auto log_prefix_hook_ptr = log_prefix_hook.Load();
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if (log_prefix_hook_ptr) {
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enabled = log_prefix_hook_ptr(severity, file, line, &buf, &size);
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} else {
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if (enabled) {
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DoRawLog(&buf, &size, "[%s : %d] RAW: ", file, line);
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}
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}
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const char* const prefix_end = buf;
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#ifdef ABSL_LOW_LEVEL_WRITE_SUPPORTED
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if (enabled) {
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bool no_chop = VADoRawLog(&buf, &size, format, ap);
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if (no_chop) {
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DoRawLog(&buf, &size, "\n");
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} else {
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DoRawLog(&buf, &size, "%s", kTruncated);
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}
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absl::raw_logging_internal::SafeWriteToStderr(buffer, strlen(buffer));
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}
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#else
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static_cast<void>(format);
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static_cast<void>(ap);
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#endif
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// Abort the process after logging a FATAL message, even if the output itself
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// was suppressed.
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if (severity == absl::LogSeverity::kFatal) {
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abort_hook(file, line, buffer, prefix_end, buffer + kLogBufSize);
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abort();
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}
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}
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} // namespace
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namespace absl {
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namespace raw_logging_internal {
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void SafeWriteToStderr(const char *s, size_t len) {
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#if defined(ABSL_HAVE_SYSCALL_WRITE)
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syscall(SYS_write, STDERR_FILENO, s, len);
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#elif defined(ABSL_HAVE_POSIX_WRITE)
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write(STDERR_FILENO, s, len);
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#elif defined(ABSL_HAVE_RAW_IO)
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_write(/* stderr */ 2, s, len);
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#else
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// stderr logging unsupported on this platform
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(void) s;
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(void) len;
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#endif
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}
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void RawLog(absl::LogSeverity severity, const char* file, int line,
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const char* format, ...) ABSL_PRINTF_ATTRIBUTE(4, 5);
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void RawLog(absl::LogSeverity severity, const char* file, int line,
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const char* format, ...) {
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va_list ap;
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va_start(ap, format);
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RawLogVA(severity, file, line, format, ap);
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va_end(ap);
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}
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// Non-formatting version of RawLog().
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//
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// TODO(gfalcon): When string_view no longer depends on base, change this
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// interface to take its message as a string_view instead.
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static void DefaultInternalLog(absl::LogSeverity severity, const char* file,
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int line, const std::string& message) {
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RawLog(severity, file, line, "%s", message.c_str());
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}
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bool RawLoggingFullySupported() {
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#ifdef ABSL_LOW_LEVEL_WRITE_SUPPORTED
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return true;
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#else // !ABSL_LOW_LEVEL_WRITE_SUPPORTED
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return false;
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#endif // !ABSL_LOW_LEVEL_WRITE_SUPPORTED
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}
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ABSL_CONST_INIT absl::base_internal::AtomicHook<InternalLogFunction>
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internal_log_function(DefaultInternalLog);
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void RegisterInternalLogFunction(InternalLogFunction func) {
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internal_log_function.Store(func);
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}
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} // namespace raw_logging_internal
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} // namespace absl
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