feat(log): Bring log component from esp-idf

components/log/include/esp_log_internal.h

@@ -0,0 +1,24 @@
+// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef __ESP_LOG_INTERNAL_H__
+#define __ESP_LOG_INTERNAL_H__
+
+//these functions do not check level versus ESP_LOCAL_LEVEL, this should be done in esp_log.h
+void esp_log_buffer_hex_internal(const char *tag, const void *buffer, uint16_t buff_len, esp_log_level_t level);
+void esp_log_buffer_char_internal(const char *tag, const void *buffer, uint16_t buff_len, esp_log_level_t level);
+void esp_log_buffer_hexdump_internal( const char *tag, const void *buffer, uint16_t buff_len, esp_log_level_t log_level);
+
+#endif
+