esp_modem: Move common C definitions in to separate header

Separate header for C API created.
It can be used by C DTE extensions.

components/esp_modem/idf_component.yml

@@ -1,4 +1,4 @@
-version: "0.1.22"
+version: "0.1.23"
 description: esp modem
 url: https://github.com/espressif/esp-protocols/tree/master/components/esp_modem
 dependencies:

components/esp_modem/include/esp_private/c_api_wrapper.hpp

@@ -0,0 +1,45 @@
+// Copyright 2022 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.
+
+#pragma once
+
+#include "cxx_include/esp_modem_dce_factory.hpp"
+#include "esp_modem_c_api_types.h"
+
+using namespace esp_modem;
+
+struct esp_modem_dce_wrap { // need to mimic the polymorphic dispatch as CPP uses templated dispatch
+    enum class modem_wrap_dte_type { UART, VFS, USB } dte_type;
+    dce_factory::ModemType modem_type;
+    DCE *dce;
+};
+
+inline dce_factory::ModemType convert_modem_enum(esp_modem_dce_device_t module)
+{
+    switch (module) {
+    case ESP_MODEM_DCE_SIM7600:
+        return esp_modem::dce_factory::ModemType::SIM7600;
+    case ESP_MODEM_DCE_SIM7070:
+        return esp_modem::dce_factory::ModemType::SIM7070;
+    case ESP_MODEM_DCE_SIM7000:
+        return esp_modem::dce_factory::ModemType::SIM7000;
+    case ESP_MODEM_DCE_BG96:
+        return esp_modem::dce_factory::ModemType::BG96;
+    case ESP_MODEM_DCE_SIM800:
+        return esp_modem::dce_factory::ModemType::SIM800;
+    default:
+    case ESP_MODEM_DCE_GENETIC:
+        return esp_modem::dce_factory::ModemType::GenericModule;
+    }
+}

components/esp_modem/src/esp_modem_c_api.cpp

@@ -21,6 +21,7 @@
 #include "esp_modem_c_api_types.h"
 #include "esp_modem_config.h"
 #include "exception_stub.hpp"
+#include "esp_private/c_api_wrapper.hpp"
 #include "cstring"
 
 #ifndef ESP_MODEM_C_API_STR_MAX
@@ -35,12 +36,6 @@ size_t strlcpy(char *dest, const char *src, size_t len);
 // C API definitions
 using namespace esp_modem;
 
-struct esp_modem_dce_wrap { // need to mimic the polymorphic dispatch as CPP uses templated dispatch
-    enum class modem_wrap_dte_type { UART, } dte_type;
-    dce_factory::ModemType modem_type;
-    DCE *dce;
-};
-
 static inline esp_err_t command_response_to_esp_err(command_result res)
 {
     switch (res) {
@@ -54,25 +49,6 @@ static inline esp_err_t command_response_to_esp_err(command_result res)
     return ESP_ERR_INVALID_ARG;
 }
 
-static inline dce_factory::ModemType convert_modem_enum(esp_modem_dce_device_t module)
-{
-    switch (module) {
-    case ESP_MODEM_DCE_SIM7600:
-        return esp_modem::dce_factory::ModemType::SIM7600;
-    case ESP_MODEM_DCE_SIM7070:
-        return esp_modem::dce_factory::ModemType::SIM7070;
-    case ESP_MODEM_DCE_SIM7000:
-        return esp_modem::dce_factory::ModemType::SIM7000;
-    case ESP_MODEM_DCE_BG96:
-        return esp_modem::dce_factory::ModemType::BG96;
-    case ESP_MODEM_DCE_SIM800:
-        return esp_modem::dce_factory::ModemType::SIM800;
-    default:
-    case ESP_MODEM_DCE_GENETIC:
-        return esp_modem::dce_factory::ModemType::GenericModule;
-    }
-}
-
 extern "C" esp_modem_dce_t *esp_modem_new_dev(esp_modem_dce_device_t module, const esp_modem_dte_config_t *dte_config, const esp_modem_dce_config_t *dce_config, esp_netif_t *netif)
 {
     auto dce_wrap = new (std::nothrow) esp_modem_dce_wrap;