Fork of Smoothie to port to mbed non-LPC targets.
Fork of Smoothie by
libs/StreamOutput.h
- Committer:
- Michael J. Spencer
- Date:
- 2014-02-28
- Revision:
- 2:1df0b61d3b5a
- Parent:
- 0:31e91bb0ef3c
- Child:
- 3:f151d08d335c
File content as of revision 2:1df0b61d3b5a:
/* This file is part of Smoothie (http://smoothieware.org/). The motion control part is heavily based on Grbl (https://github.com/simen/grbl). Smoothie is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. Smoothie 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 General Public License for more details. You should have received a copy of the GNU General Public License along with Smoothie. If not, see <http://www.gnu.org/licenses/>. */ #ifndef STREAMOUTPUT_H #define STREAMOUTPUT_H #include <cstdarg> #include <cstring> #include <stdio.h> // This is a base class for all StreamOutput objects. // StreamOutputs are basically "things you can sent strings to". They are passed along with gcodes for example so modules can answer to those gcodes. // They are usually associated with a command source, but can also be a NullStreamOutput if we just want to ignore whatever is sent class NullStreamOutput; class StreamOutput { public: StreamOutput(){} virtual ~StreamOutput(){} virtual int printf(const char* format, ...) __attribute__ ((format(printf, 2, 3))) { char b[64]; char *buffer; // Make the message va_list args; va_start(args, format); int size = vsnprintf(b, 64, format, args) + 1; // we add one to take into account space for the terminating \0 if (size < 64) buffer = b; else { buffer = new char[size]; vsnprintf(buffer, size, format, args); } va_end(args); puts(buffer); if (buffer != b) delete[] buffer; return size - 1; } virtual int _putc(int c) { return 1; } virtual int _getc(void) { return 0; } virtual int puts(const char* str) = 0; static NullStreamOutput NullStream; }; class NullStreamOutput : public StreamOutput { public: int puts(const char* str) { return strlen(str); } }; #endif