FileHandle_stub.h

00001 /*
00002  * Copyright (c) , Arm Limited and affiliates.
00003  * SPDX-License-Identifier: Apache-2.0
00004  *
00005  * Licensed under the Apache License, Version 2.0 (the "License");
00006  * you may not use this file except in compliance with the License.
00007  * You may obtain a copy of the License at
00008  *
00009  *     http://www.apache.org/licenses/LICENSE-2.0
00010  *
00011  * Unless required by applicable law or agreed to in writing, software
00012  * distributed under the License is distributed on an "AS IS" BASIS,
00013  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00014  * See the License for the specific language governing permissions and
00015  * limitations under the License.
00016  */
00017 #ifndef __FILE_HANDLE_STUB_H__
00018 #define __FILE_HANDLE_STUB_H__
00019 
00020 #include "FileHandle.h"
00021 
00022 
00023 namespace mbed {
00024 
00025 static uint8_t filehandle_stub_short_value_counter = 0;
00026 static char *filehandle_stub_table = NULL;
00027 static uint8_t filehandle_stub_table_pos = 0;
00028 
00029 class FileHandle_stub : public FileHandle
00030 {
00031 public:
00032     size_t size_value;
00033 
00034     FileHandle_stub() {size_value = 0;}
00035 
00036     virtual ssize_t read(void *buffer, size_t size){
00037         if (filehandle_stub_table) {
00038             ssize_t ret = strlen(filehandle_stub_table) - filehandle_stub_table_pos;
00039             if (size < ret) {
00040                 ret = size;
00041             }
00042             memcpy(buffer, filehandle_stub_table, ret);
00043             filehandle_stub_table_pos += ret;
00044             return ret;
00045         }
00046         return 0;
00047     }
00048 
00049     virtual ssize_t write(const void *buffer, size_t size){
00050         if( size_value ) {
00051             size_value--;
00052             return size;
00053         }
00054         return 0;
00055     }
00056 
00057     virtual off_t seek(off_t offset, int whence = SEEK_SET){return 0;}
00058 
00059     virtual int close(){}
00060 
00061     virtual short poll(short events) const{
00062         if (filehandle_stub_short_value_counter) {
00063             filehandle_stub_short_value_counter--;
00064             return short_value;
00065         }
00066         return 0;
00067     }
00068 
00069     virtual void sigio(Callback<void()> func){func();}
00070 
00071     short short_value;
00072 };
00073 
00074 }
00075 
00076 #endif
00077 
00078