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#include "config.h"
#include "logging.h"
#include <cctype>
#include <cstdarg>
#include <cstdio>
#include <cstring>
#include <mutex>
#include <optional>
#include <string>
#include <vector>
#include "alspan.h"
#include "strutils.h"
#if defined(_WIN32)
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#elif defined(__ANDROID__)
#include <android/log.h>
#endif
FILE *gLogFile{stderr};
#ifdef _DEBUG
LogLevel gLogLevel{LogLevel::Warning};
#else
LogLevel gLogLevel{LogLevel::Error};
#endif
namespace {
enum class LogState : uint8_t {
FirstRun,
Ready,
Disable
};
std::mutex LogCallbackMutex;
LogState gLogState{LogState::FirstRun};
LogCallbackFunc gLogCallback{};
void *gLogCallbackPtr{};
constexpr std::optional<char> GetLevelCode(LogLevel level)
{
switch(level)
{
case LogLevel::Disable: break;
case LogLevel::Error: return 'E';
case LogLevel::Warning: return 'W';
case LogLevel::Trace: return 'I';
}
return std::nullopt;
}
} // namespace
void al_set_log_callback(LogCallbackFunc callback, void *userptr)
{
auto cblock = std::lock_guard{LogCallbackMutex};
gLogCallback = callback;
gLogCallbackPtr = callback ? userptr : nullptr;
if(gLogState == LogState::FirstRun)
{
auto extlogopt = al::getenv("ALSOFT_DISABLE_LOG_CALLBACK");
if(!extlogopt || *extlogopt != "1")
gLogState = LogState::Ready;
else
gLogState = LogState::Disable;
}
}
void al_print(LogLevel level, const char *fmt, ...)
{
/* Kind of ugly since string literals are const char arrays with a size
* that includes the null terminator, which we want to exclude from the
* span.
*/
auto prefix = al::span{"[ALSOFT] (--) "}.first<14>();
switch(level)
{
case LogLevel::Disable: break;
case LogLevel::Error: prefix = al::span{"[ALSOFT] (EE) "}.first<14>(); break;
case LogLevel::Warning: prefix = al::span{"[ALSOFT] (WW) "}.first<14>(); break;
case LogLevel::Trace: prefix = al::span{"[ALSOFT] (II) "}.first<14>(); break;
}
std::vector<char> dynmsg;
std::array<char,256> stcmsg{};
char *str{stcmsg.data()};
auto prefend1 = std::copy_n(prefix.begin(), prefix.size(), stcmsg.begin());
al::span<char> msg{prefend1, stcmsg.end()};
std::va_list args, args2;
va_start(args, fmt);
va_copy(args2, args);
const int msglen{std::vsnprintf(msg.data(), msg.size(), fmt, args)};
if(msglen >= 0)
{
if(static_cast<size_t>(msglen) >= msg.size()) UNLIKELY
{
dynmsg.resize(static_cast<size_t>(msglen)+prefix.size() + 1u);
str = dynmsg.data();
auto prefend2 = std::copy_n(prefix.begin(), prefix.size(), dynmsg.begin());
msg = {prefend2, dynmsg.end()};
std::vsnprintf(msg.data(), msg.size(), fmt, args2);
}
msg = msg.first(static_cast<size_t>(msglen));
}
else
msg = {msg.data(), std::strlen(msg.data())};
va_end(args2);
va_end(args);
if(gLogLevel >= level)
{
auto logfile = gLogFile;
fputs(str, logfile);
fflush(logfile);
}
#if defined(_WIN32) && !defined(NDEBUG)
/* OutputDebugStringW has no 'level' property to distinguish between
* informational, warning, or error debug messages. So only print them for
* non-Release builds.
*/
std::wstring wstr{utf8_to_wstr(str)};
OutputDebugStringW(wstr.c_str());
#elif defined(__ANDROID__)
auto android_severity = [](LogLevel l) noexcept
{
switch(l)
{
case LogLevel::Trace: return ANDROID_LOG_DEBUG;
case LogLevel::Warning: return ANDROID_LOG_WARN;
case LogLevel::Error: return ANDROID_LOG_ERROR;
/* Should not happen. */
case LogLevel::Disable:
break;
}
return ANDROID_LOG_ERROR;
};
__android_log_print(android_severity(level), "openal", "%s", str);
#endif
auto cblock = std::lock_guard{LogCallbackMutex};
if(gLogState != LogState::Disable)
{
while(!msg.empty() && std::isspace(msg.back()))
{
msg.back() = '\0';
msg = msg.first(msg.size()-1);
}
if(auto logcode = GetLevelCode(level); logcode && !msg.empty())
{
if(gLogCallback)
gLogCallback(gLogCallbackPtr, *logcode, msg.data(), static_cast<int>(msg.size()));
else if(gLogState == LogState::FirstRun)
gLogState = LogState::Disable;
}
}
}
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