[FL-1147] System logging (#434)

* furi_log: introduce log system
* applications: rework with furi logging
* furi_log: reset color after tag printed
* core: add log info

Co-authored-by: あく <alleteam@gmail.com>

core/furi/log.c

@@ -0,0 +1,52 @@
+#include "log.h"
+#include <stm32wbxx_hal.h>
+#include "check.h"
+
+typedef struct {
+    FuriLogLevel log_level;
+    FuriLogPrint print;
+    FuriLogVPrint vprint;
+    FuriLogTimestamp timetamp;
+} FuriLogParams;
+
+static FuriLogParams furi_log;
+
+void furi_log_init() {
+    // Set default logging parameters
+    furi_log.log_level = FURI_LOG_LEVEL;
+    furi_log.print = printf;
+    furi_log.vprint = vprintf;
+    furi_log.timetamp = HAL_GetTick;
+}
+
+void furi_log_print(FuriLogLevel level, const char* format, ...) {
+    va_list args;
+    va_start(args, format);
+    if(level <= furi_log.log_level) {
+        furi_log.print("%lu ", furi_log.timetamp());
+        furi_log.vprint(format, args);
+    }
+    va_end(args);
+}
+
+void furi_log_set_level(FuriLogLevel level) {
+    furi_log.log_level = level;
+}
+
+FuriLogLevel furi_log_get_level(void) {
+    return furi_log.log_level;
+}
+
+void furi_log_set_print(FuriLogPrint print, FuriLogVPrint vprint) {
+    furi_assert(print);
+    furi_assert(vprint);
+
+    furi_log.print = print;
+    furi_log.vprint = vprint;
+}
+
+void furi_log_set_timestamp(FuriLogTimestamp timestamp) {
+    furi_assert(timestamp);
+
+    furi_log.timetamp = timestamp;
+}

core/furi/log.h

@@ -0,0 +1,66 @@
+#pragma once
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdarg.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define FURI_LOG_LEVEL_DEFAULT 3
+
+#ifndef FURI_LOG_LEVEL
+#define FURI_LOG_LEVEL FURI_LOG_LEVEL_DEFAULT
+#endif
+
+#define FURI_LOG_CLR(clr) "\033[0;" clr "m"
+#define FURI_LOG_CLR_RESET "\033[0m"
+
+#define FURI_LOG_CLR_BLACK "30"
+#define FURI_LOG_CLR_RED "31"
+#define FURI_LOG_CLR_GREEN "32"
+#define FURI_LOG_CLR_BROWN "33"
+#define FURI_LOG_CLR_BLUE "34"
+#define FURI_LOG_CLR_PURPLE "35"
+
+#define FURI_LOG_CLR_E FURI_LOG_CLR(FURI_LOG_CLR_RED)
+#define FURI_LOG_CLR_W FURI_LOG_CLR(FURI_LOG_CLR_BROWN)
+#define FURI_LOG_CLR_I FURI_LOG_CLR(FURI_LOG_CLR_GREEN)
+#define FURI_LOG_CLR_D FURI_LOG_CLR(FURI_LOG_CLR_BLUE)
+#define FURI_LOG_CLR_V
+
+typedef int (*FuriLogPrint)(const char*, ...);
+typedef int (*FuriLogVPrint)(const char*, va_list);
+typedef uint32_t (*FuriLogTimestamp)(void);
+
+typedef enum {
+    FURI_LOG_NONE = 0,
+    FURI_LOG_ERROR = 1,
+    FURI_LOG_WARN = 2,
+    FURI_LOG_INFO = 3,
+    FURI_LOG_DEBUG = 4,
+    FURI_LOG_VERBOSE = 5,
+} FuriLogLevel;
+
+void furi_log_init();
+void furi_log_print(FuriLogLevel level, const char* format, ...);
+void furi_log_set_level(FuriLogLevel level);
+FuriLogLevel furi_log_get_level();
+void furi_log_set_print(FuriLogPrint print, FuriLogVPrint vprint);
+void furi_log_set_timestamp(FuriLogTimestamp timestamp);
+
+#define FURI_LOG_FORMAT(log_letter, tag, format) \
+    FURI_LOG_CLR_##log_letter "[" #log_letter "][" tag "]: " FURI_LOG_CLR_RESET format "\r\n"
+#define FURI_LOG_SHOW(tag, format, log_level, log_letter, ...) \
+    furi_log_print(log_level, FURI_LOG_FORMAT(log_letter, tag, format), ##__VA_ARGS__)
+
+#define FURI_LOG_E(tag, format, ...) FURI_LOG_SHOW(tag, format, FURI_LOG_ERROR, E, ##__VA_ARGS__)
+#define FURI_LOG_W(tag, format, ...) FURI_LOG_SHOW(tag, format, FURI_LOG_WARN, W, ##__VA_ARGS__)
+#define FURI_LOG_I(tag, format, ...) FURI_LOG_SHOW(tag, format, FURI_LOG_INFO, I, ##__VA_ARGS__)
+#define FURI_LOG_D(tag, format, ...) FURI_LOG_SHOW(tag, format, FURI_LOG_DEBUG, D, ##__VA_ARGS__)
+#define FURI_LOG_V(tag, format, ...) FURI_LOG_SHOW(tag, format, FURI_LOG_VERBOSE, V, ##__VA_ARGS__)
+
+#ifdef __cplusplus
+}
+#endif