Merge pull request #258 from yuriks/log-ng

New logging system

1 files changed, 126 insertions, 0 deletions

diff --git a/src/common/logging/text_formatter.cpp b/src/common/logging/text_formatter.cpp
new file mode 100644
index 00000000..3fe43534
--- /dev/null
+++ b/src/common/logging/text_formatter.cpp
@@ -0,0 +1,126 @@
+// Copyright 2014 Citra Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include <array>
+#include <cstdio>
+
+#ifdef _WIN32
+#   define WIN32_LEAN_AND_MEAN
+#   include <Windows.h>
+#endif
+
+#include "common/logging/backend.h"
+#include "common/logging/filter.h"
+#include "common/logging/log.h"
+#include "common/logging/text_formatter.h"
+
+#include "common/string_util.h"
+
+namespace Log {
+
+// TODO(bunnei): This should be moved to a generic path manipulation library
+const char* TrimSourcePath(const char* path, const char* root) {
+    const char* p = path;
+
+    while (*p != '\0') {
+        const char* next_slash = p;
+        while (*next_slash != '\0' && *next_slash != '/' && *next_slash != '\\') {
+            ++next_slash;
+        }
+
+        bool is_src = Common::ComparePartialString(p, next_slash, root);
+        p = next_slash;
+
+        if (*p != '\0') {
+            ++p;
+        }
+        if (is_src) {
+            path = p;
+        }
+    }
+    return path;
+}
+
+void FormatLogMessage(const Entry& entry, char* out_text, size_t text_len) {
+    unsigned int time_seconds    = static_cast<unsigned int>(entry.timestamp.count() / 1000000);
+    unsigned int time_fractional = static_cast<unsigned int>(entry.timestamp.count() % 1000000);
+
+    const char* class_name = Logger::GetLogClassName(entry.log_class);
+    const char* level_name = Logger::GetLevelName(entry.log_level);
+
+    snprintf(out_text, text_len, "[%4u.%06u] %s <%s> %s: %s",
+        time_seconds, time_fractional, class_name, level_name,
+        TrimSourcePath(entry.location.c_str()), entry.message.c_str());
+}
+
+static void ChangeConsoleColor(Level level) {
+#ifdef _WIN32
+    static HANDLE console_handle = GetStdHandle(STD_ERROR_HANDLE);
+
+    WORD color = 0;
+    switch (level) {
+    case Level::Trace: // Grey
+        color = FOREGROUND_INTENSITY; break;
+    case Level::Debug: // Cyan
+        color = FOREGROUND_GREEN | FOREGROUND_BLUE; break;
+    case Level::Info: // Bright gray
+        color = FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE; break;
+    case Level::Warning: // Bright yellow
+        color = FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_INTENSITY; break;
+    case Level::Error: // Bright red
+        color = FOREGROUND_RED | FOREGROUND_INTENSITY; break;
+    case Level::Critical: // Bright magenta
+        color = FOREGROUND_RED | FOREGROUND_BLUE | FOREGROUND_INTENSITY; break;
+    }
+
+    SetConsoleTextAttribute(console_handle, color);
+#else
+#define ESC "\x1b"
+    const char* color = "";
+    switch (level) {
+    case Level::Trace: // Grey
+        color = ESC "[1;30m"; break;
+    case Level::Debug: // Cyan
+        color = ESC "[0;36m"; break;
+    case Level::Info: // Bright gray
+        color = ESC "[0;37m"; break;
+    case Level::Warning: // Bright yellow
+        color = ESC "[1;33m"; break;
+    case Level::Error: // Bright red
+        color = ESC "[1;31m"; break;
+    case Level::Critical: // Bright magenta
+        color = ESC "[1;35m"; break;
+    }
+#undef ESC
+
+    fputs(color, stderr);
+#endif
+}
+
+void PrintMessage(const Entry& entry) {
+    ChangeConsoleColor(entry.log_level);
+    std::array<char, 4 * 1024> format_buffer;
+    FormatLogMessage(entry, format_buffer.data(), format_buffer.size());
+    fputs(format_buffer.data(), stderr);
+    fputc('\n', stderr);
+}
+
+void TextLoggingLoop(std::shared_ptr<Logger> logger, const Filter* filter) {
+    std::array<Entry, 256> entry_buffer;
+
+    while (true) {
+        size_t num_entries = logger->GetEntries(entry_buffer.data(), entry_buffer.size());
+        if (num_entries == Logger::QUEUE_CLOSED) {
+            break;
+        }
+        for (size_t i = 0; i < num_entries; ++i) {
+            const Entry& entry = entry_buffer[i];
+            if (filter->CheckMessage(entry.log_class, entry.log_level)) {
+                PrintMessage(entry);
+            }
+        }
+    }
+}
+
+}