diff options
Diffstat (limited to 'cores/arduino/Stream.h')
| -rw-r--r-- | cores/arduino/Stream.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/cores/arduino/Stream.h b/cores/arduino/Stream.h index 93d8275..13f11be 100644 --- a/cores/arduino/Stream.h +++ b/cores/arduino/Stream.h @@ -15,6 +15,8 @@ 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 @@ -23,13 +25,70 @@ #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 { + private: + 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 + + 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 |