mirror of
https://github.com/pascallanger/DIY-Multiprotocol-TX-Module.git
synced 2025-10-30 18:55:21 +00:00
97 lines
3.9 KiB
C++
97 lines
3.9 KiB
C++
/*
|
|
Stream.h - base class for character-based streams.
|
|
Copyright (c) 2010 David A. Mellis. All right reserved.
|
|
|
|
This library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
This library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with this library; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
|
|
parsing functions based on TextFinder library by Michael Margolis
|
|
*/
|
|
|
|
#ifndef Stream_h
|
|
#define Stream_h
|
|
|
|
#include <inttypes.h>
|
|
#include "Print.h"
|
|
|
|
// compatability macros for testing
|
|
/*
|
|
#define getInt() parseInt()
|
|
#define getInt(skipChar) parseInt(skipchar)
|
|
#define getFloat() parseFloat()
|
|
#define getFloat(skipChar) parseFloat(skipChar)
|
|
#define getString( pre_string, post_string, buffer, length)
|
|
readBytesBetween( pre_string, terminator, buffer, length)
|
|
*/
|
|
|
|
class Stream : public Print
|
|
{
|
|
protected:
|
|
unsigned long _timeout; // number of milliseconds to wait for the next char before aborting timed read
|
|
unsigned long _startMillis; // used for timeout measurement
|
|
int timedRead(); // private method to read stream with timeout
|
|
int timedPeek(); // private method to peek stream with timeout
|
|
int peekNextDigit(); // returns the next numeric digit in the stream or -1 if timeout
|
|
|
|
public:
|
|
virtual int available() = 0;
|
|
virtual int read() = 0;
|
|
virtual int peek() = 0;
|
|
virtual void flush() = 0;
|
|
|
|
Stream() {_timeout=1000;}
|
|
|
|
// parsing methods
|
|
|
|
void setTimeout(unsigned long timeout); // sets maximum milliseconds to wait for stream data, default is 1 second
|
|
|
|
bool find(char *target); // reads data from the stream until the target string is found
|
|
// returns true if target string is found, false if timed out (see setTimeout)
|
|
|
|
bool find(char *target, size_t length); // reads data from the stream until the target string of given length is found
|
|
// returns true if target string is found, false if timed out
|
|
|
|
bool findUntil(char *target, char *terminator); // as find but search ends if the terminator string is found
|
|
|
|
bool findUntil(char *target, size_t targetLen, char *terminate, size_t termLen); // as above but search ends if the terminate string is found
|
|
|
|
|
|
long parseInt(); // returns the first valid (long) integer value from the current position.
|
|
// initial characters that are not digits (or the minus sign) are skipped
|
|
// integer is terminated by the first character that is not a digit.
|
|
|
|
float parseFloat(); // float version of parseInt
|
|
|
|
size_t readBytes( char *buffer, size_t length); // read chars from stream into buffer
|
|
// terminates if length characters have been read or timeout (see setTimeout)
|
|
// returns the number of characters placed in the buffer (0 means no valid data found)
|
|
|
|
size_t readBytesUntil( char terminator, char *buffer, size_t length); // as readBytes with terminator character
|
|
// terminates if length characters have been read, timeout, or if the terminator character detected
|
|
// returns the number of characters placed in the buffer (0 means no valid data found)
|
|
|
|
// Arduino String functions to be added here
|
|
String readString();
|
|
String readStringUntil(char terminator);
|
|
|
|
protected:
|
|
long parseInt(char skipChar); // as above but the given skipChar is ignored
|
|
// as above but the given skipChar is ignored
|
|
// this allows format characters (typically commas) in values to be ignored
|
|
|
|
float parseFloat(char skipChar); // as above but the given skipChar is ignored
|
|
};
|
|
|
|
#endif
|