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Stream.h
00001 /* mbed Microcontroller Library 00002 * Copyright (c) 2006-2013 ARM Limited 00003 * 00004 * Licensed under the Apache License, Version 2.0 (the "License"); 00005 * you may not use this file except in compliance with the License. 00006 * You may obtain a copy of the License at 00007 * 00008 * http://www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an "AS IS" BASIS, 00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 */ 00016 #ifndef MBED_STREAM_H 00017 #define MBED_STREAM_H 00018 00019 #include "platform/platform.h" 00020 #include "platform/FileLike.h" 00021 #include "platform/FileHandle.h" 00022 #include "platform/NonCopyable.h" 00023 #include <cstdio> 00024 #include <cstdarg> 00025 00026 namespace mbed { 00027 /** \addtogroup platform */ 00028 /** @{*/ 00029 /** 00030 * \defgroup platform_Stream Stream class 00031 * @{ 00032 */ 00033 00034 extern void mbed_set_unbuffered_stream(std::FILE *_file); 00035 extern int mbed_getc(std::FILE *_file); 00036 extern char *mbed_gets(char *s, int size, std::FILE *_file); 00037 00038 /** File stream 00039 * 00040 * @note Synchronization level: Set by subclass 00041 */ 00042 class Stream : public FileLike, private NonCopyable<Stream> { 00043 00044 public: 00045 Stream(const char *name = NULL); 00046 virtual ~Stream(); 00047 00048 int putc(int c); 00049 int puts(const char *s); 00050 int getc(); 00051 char *gets(char *s, int size); 00052 int printf(const char *format, ...); 00053 int scanf(const char *format, ...); 00054 int vprintf(const char *format, std::va_list args); 00055 int vscanf(const char *format, std::va_list args); 00056 00057 operator std::FILE *() 00058 { 00059 return _file; 00060 } 00061 00062 protected: 00063 virtual int close(); 00064 virtual ssize_t write(const void *buffer, size_t length); 00065 virtual ssize_t read(void *buffer, size_t length); 00066 virtual off_t seek(off_t offset, int whence); 00067 virtual off_t tell(); 00068 virtual void rewind(); 00069 virtual int isatty(); 00070 virtual int sync(); 00071 virtual off_t size(); 00072 00073 virtual int _putc(int c) = 0; 00074 virtual int _getc() = 0; 00075 00076 std::FILE *_file; 00077 00078 /** Acquire exclusive access to this object. 00079 */ 00080 virtual void lock() 00081 { 00082 // Stub 00083 } 00084 00085 /** Release exclusive access to this object. 00086 */ 00087 virtual void unlock() 00088 { 00089 // Stub 00090 } 00091 }; 00092 /**@}*/ 00093 00094 /**@}*/ 00095 } // namespace mbed 00096 00097 #endif 00098
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