Import of the watch repository from Pebble

src/fw/applib/app_logging.c

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * 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.
+ */
+
+#include "applib/app_logging.h"
+
+#include <stdint.h>
+#include <stddef.h>
+
+// FIXME PBL-1629: move needed declarations into applib
+#include "syscall/syscall.h"
+#include "process_management/app_manager.h"
+#include "services/common/comm_session/session.h"
+#include "system/logging.h"
+#include "system/passert.h"
+
+void app_log_vargs(uint8_t log_level, const char* src_filename, int src_line_number, const char* fmt, va_list args) {
+  char log_buffer[LOG_BUFFER_LENGTH];
+  _Static_assert(sizeof(log_buffer) > sizeof(AppLogBinaryMessage), "log_buffer too small for AppLogBinaryMessage");
+
+  AppLogBinaryMessage* msg = (AppLogBinaryMessage*)log_buffer;
+  sys_get_app_uuid(&msg->uuid);
+  const size_t log_msg_offset = offsetof(AppLogBinaryMessage, log_msg);
+  int bin_msg_length = pbl_log_binary_format((char*)&msg->log_msg, sizeof(log_buffer) - log_msg_offset, log_level,
+                                             src_filename, src_line_number, fmt, args);
+  sys_app_log(log_msg_offset + bin_msg_length, log_buffer);
+}
+
+void app_log(uint8_t log_level, const char* src_filename, int src_line_number, const char* fmt, ...) {
+  va_list args;
+  va_start(args, fmt);
+  app_log_vargs(log_level, src_filename, src_line_number, fmt, args);
+  va_end(args);
+}
+