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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/libjingle/overrides/talk/base/logging.h"
#if defined(OS_MACOSX)
#include <CoreServices/CoreServices.h>
#endif // OS_MACOSX
#include <iomanip>
#include "base/string_util.h"
#include "third_party/libjingle/source/talk/base/stream.h"
#include "third_party/libjingle/source/talk/base/stringencode.h"
#include "third_party/libjingle/source/talk/base/stringutils.h"
// LOG_E can't call VLOG directly like LOG_V can since VLOG expands into usage
// of the __FILE__ macro (for filtering) and the actual VLOG call from LOG_E
// happens inside LogEHelper. Note that the second parameter to the LAZY_STREAM
// macro is true since the filter check is already done for LOG_E.
#define LOG_E_BASE(file_name, line_number, sev) \
LAZY_STREAM(logging::LogMessage(file_name, line_number, \
-sev).stream(), true)
namespace talk_base {
/////////////////////////////////////////////////////////////////////////////
// Constant Labels
/////////////////////////////////////////////////////////////////////////////
const char* FindLabel(int value, const ConstantLabel entries[]) {
for (int i = 0; entries[i].label; ++i) {
if (value == entries[i].value) return entries[i].label;
}
return 0;
}
std::string ErrorName(int err, const ConstantLabel* err_table) {
if (err == 0)
return "No error";
if (err_table != 0) {
if (const char * value = FindLabel(err, err_table))
return value;
}
char buffer[16];
base::snprintf(buffer, sizeof(buffer), "0x%08x", err);
return buffer;
}
/////////////////////////////////////////////////////////////////////////////
// LogEHelper
/////////////////////////////////////////////////////////////////////////////
// Summarizes LOG_E messages as strings.
static std::string GenerateExtra(LogErrorContext err_ctx,
int err,
const char* module) {
if (err_ctx != ERRCTX_NONE) {
std::ostringstream tmp;
tmp << ": ";
tmp << "[0x" << std::setfill('0') << std::hex << std::setw(8) << err << "]";
switch (err_ctx) {
case ERRCTX_ERRNO:
tmp << " " << strerror(err);
break;
#if defined(OS_WIN)
case ERRCTX_HRESULT: {
char msgbuf[256];
DWORD flags = FORMAT_MESSAGE_FROM_SYSTEM;
HMODULE hmod = GetModuleHandleA(module);
if (hmod)
flags |= FORMAT_MESSAGE_FROM_HMODULE;
if (DWORD len = FormatMessageA(
flags, hmod, err,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
msgbuf, sizeof(msgbuf) / sizeof(msgbuf[0]), NULL)) {
while ((len > 0) &&
isspace(static_cast<unsigned char>(msgbuf[len-1]))) {
msgbuf[--len] = 0;
}
tmp << " " << msgbuf;
}
break;
}
#endif // OS_WIN
#if defined(OS_MACOSX)
case ERRCTX_OSSTATUS: {
tmp << " " << nonnull(GetMacOSStatusErrorString(err), "Unknown error");
if (const char* desc = GetMacOSStatusCommentString(err)) {
tmp << ": " << desc;
}
break;
}
#endif // OS_MACOSX
default:
break;
}
return tmp.str();
}
return "";
}
LogEHelper::LogEHelper(const char* file,
int line,
LoggingSeverity severity,
LogErrorContext err_ctx,
int err,
const char* module)
: file_name_(file),
line_(line),
severity_(severity) {
extra_ = GenerateExtra(err_ctx, err, module);
}
LogEHelper::~LogEHelper() {
print_stream_ << extra_;
const std::string& str = print_stream_.str();
LOG_E_BASE(file_name_.c_str(), line_, severity_) << str;
}
// Note: this function is a copy from the overriden libjingle implementation.
void LogMultiline(LoggingSeverity level, const char* label, bool input,
const void* data, size_t len, bool hex_mode,
LogMultilineState* state) {
if (!LOG_CHECK_LEVEL_V(level))
return;
const char * direction = (input ? " << " : " >> ");
// NULL data means to flush our count of unprintable characters.
if (!data) {
if (state && state->unprintable_count_[input]) {
LOG_V(level) << label << direction << "## "
<< state->unprintable_count_[input]
<< " consecutive unprintable ##";
state->unprintable_count_[input] = 0;
}
return;
}
// The ctype classification functions want unsigned chars.
const unsigned char* udata = static_cast<const unsigned char*>(data);
if (hex_mode) {
const size_t LINE_SIZE = 24;
char hex_line[LINE_SIZE * 9 / 4 + 2], asc_line[LINE_SIZE + 1];
while (len > 0) {
memset(asc_line, ' ', sizeof(asc_line));
memset(hex_line, ' ', sizeof(hex_line));
size_t line_len = _min(len, LINE_SIZE);
for (size_t i = 0; i < line_len; ++i) {
unsigned char ch = udata[i];
asc_line[i] = isprint(ch) ? ch : '.';
hex_line[i*2 + i/4] = hex_encode(ch >> 4);
hex_line[i*2 + i/4 + 1] = hex_encode(ch & 0xf);
}
asc_line[sizeof(asc_line)-1] = 0;
hex_line[sizeof(hex_line)-1] = 0;
LOG_V(level) << label << direction
<< asc_line << " " << hex_line << " ";
udata += line_len;
len -= line_len;
}
return;
}
size_t consecutive_unprintable = state ? state->unprintable_count_[input] : 0;
const unsigned char* end = udata + len;
while (udata < end) {
const unsigned char* line = udata;
const unsigned char* end_of_line = strchrn<unsigned char>(udata,
end - udata,
'\n');
if (!end_of_line) {
udata = end_of_line = end;
} else {
udata = end_of_line + 1;
}
bool is_printable = true;
// If we are in unprintable mode, we need to see a line of at least
// kMinPrintableLine characters before we'll switch back.
const ptrdiff_t kMinPrintableLine = 4;
if (consecutive_unprintable && ((end_of_line - line) < kMinPrintableLine)) {
is_printable = false;
} else {
// Determine if the line contains only whitespace and printable
// characters.
bool is_entirely_whitespace = true;
for (const unsigned char* pos = line; pos < end_of_line; ++pos) {
if (isspace(*pos))
continue;
is_entirely_whitespace = false;
if (!isprint(*pos)) {
is_printable = false;
break;
}
}
// Treat an empty line following unprintable data as unprintable.
if (consecutive_unprintable && is_entirely_whitespace) {
is_printable = false;
}
}
if (!is_printable) {
consecutive_unprintable += (udata - line);
continue;
}
// Print out the current line, but prefix with a count of prior unprintable
// characters.
if (consecutive_unprintable) {
LOG_V(level) << label << direction << "## " << consecutive_unprintable
<< " consecutive unprintable ##";
consecutive_unprintable = 0;
}
// Strip off trailing whitespace.
while ((end_of_line > line) && isspace(*(end_of_line-1))) {
--end_of_line;
}
// Filter out any private data
std::string substr(reinterpret_cast<const char*>(line), end_of_line - line);
std::string::size_type pos_private = substr.find("Email");
if (pos_private == std::string::npos) {
pos_private = substr.find("Passwd");
}
if (pos_private == std::string::npos) {
LOG_V(level) << label << direction << substr;
} else {
LOG_V(level) << label << direction << "## omitted for privacy ##";
}
}
if (state) {
state->unprintable_count_[input] = consecutive_unprintable;
}
}
} // namespace talk_base
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