feat: adding bits of logging emulation

#58

src/estd/port/esp-idf/fake/esp_err.h

@@ -0,0 +1,13 @@
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef int esp_err_t;
+
+#define ESP_OK 0
+
+#ifdef __cplusplus
+}
+#endif

src/estd/port/esp-idf/fake/esp_log.h

@@ -2,11 +2,36 @@
 // DEBT: Would be better to use a wholistic logging system which included ESP target
 #pragma once
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include <stdio.h>
 
+//#define LOG_LOCAL_LEVEL
+
+//#define ESP_LOG_LEVEL
+
+enum esp_log_level_t
+{
+    ESP_LOG_NONE,
+    ESP_LOG_ERROR,
+    ESP_LOG_WARN,
+    ESP_LOG_INFO,
+    ESP_LOG_DEBUG,
+    ESP_LOG_VERBOSE
+};
+
+#define ESP_LOGE(tag, fmt...)     { printf("E %s: ", tag); printf(fmt); puts(""); }
 #define ESP_LOGW(tag, fmt...)     { printf("W %s: ", tag); printf(fmt); puts(""); }
 #define ESP_LOGI(tag, fmt...)     { printf("I %s: ", tag); printf(fmt); puts(""); }
 #define ESP_LOGD(tag, fmt...)     { printf("D %s: ", tag); printf(fmt); puts(""); }
 #define ESP_LOGV(tag, fmt...)     { printf("V %s: ", tag); printf(fmt); puts(""); }
 
-#define ESP_LOG_BUFFER_HEX(tag, buffer, len)
+#define ESP_LOG_BUFFER_HEX(tag, buffer, len)
+
+void esp_log_write(esp_log_level_t level, const char *tag, const char *format, ...);
+
+#ifdef __cplusplus
+}
+#endif

test/catch/experimental-test.cpp

@@ -13,6 +13,9 @@
 //#include <estd/locale.h>
 #include "estd/exp/unique_handle.h"
 
+// DEBT: Move this out to a 'port.cpp' test
+#include <estd/port/esp-idf/fake/esp_log.h>
+
 using namespace estd::test;
 
 struct Test