mirror of
https://github.com/DCC-EX/CommandStation-EX.git
synced 2024-12-23 21:01:25 +01:00
90 lines
3.0 KiB
C++
90 lines
3.0 KiB
C++
/*
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* © 2020, Chris Harlow. All rights reserved.
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*
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* This file is part of Asbelos DCC API
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*
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* This is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* It is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with CommandStation. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "StringFormatter.h"
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#include <stdarg.h>
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void StringFormatter::print( const __FlashStringHelper* input...) {
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va_list args;
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va_start(args, input);
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send2(Serial,input,args);
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}
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void StringFormatter::send(Print & stream, const __FlashStringHelper* input...) {
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va_list args;
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va_start(args, input);
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send2(stream,input,args);
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}
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void StringFormatter::send2(Print & stream,const __FlashStringHelper* format, va_list args) {
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// thanks to Jan Turoň https://arduino.stackexchange.com/questions/56517/formatting-strings-in-arduino-for-output
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char* flash=(char*)format;
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for(int i=0; ; ++i) {
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char c=pgm_read_byte_near(flash+i);
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if (c=='\0') return;
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if(c!='%') { stream.print(c); continue; }
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i++;
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c=pgm_read_byte_near(flash+i);
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switch(c) {
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case '%': stream.print('%'); break;
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case 'c': stream.print((char) va_arg(args, int)); break;
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case 's': stream.print(va_arg(args, char*)); break;
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case 'e': printEscapes(stream,va_arg(args, char*)); break;
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case 'E': printEscapes(stream,(const __FlashStringHelper*)va_arg(args, char*)); break;
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case 'S': stream.print((const __FlashStringHelper*)va_arg(args, char*)); break;
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case 'd': stream.print(va_arg(args, int), DEC); break;
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case 'l': stream.print(va_arg(args, long), DEC); break;
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case 'b': stream.print(va_arg(args, int), BIN); break;
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case 'o': stream.print(va_arg(args, int), OCT); break;
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case 'x': stream.print(va_arg(args, int), HEX); break;
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case 'f': stream.print(va_arg(args, double), 2); break;
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}
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}
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va_end(args);
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}
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void StringFormatter::printEscapes(Print & stream, char * input) {
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for(int i=0; ; ++i) {
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char c=input[i];
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printEscape(stream,c);
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if (c=='\0') return;
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}
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}
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void StringFormatter::printEscapes(Print & stream, const __FlashStringHelper* input) {
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char* flash=(char*)input;
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for(int i=0; ; ++i) {
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char c=pgm_read_byte_near(flash+i);
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printEscape(stream,c);
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if (c=='\0') return;
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}
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}
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void StringFormatter::printEscape(Print & stream, char c) {
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switch(c) {
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case '\n': stream.print(F("\\n")); break;
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case '\r': stream.print(F("\\r")); break;
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case '\0': stream.print(F("\\0")); return;
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case '\t': stream.print(F("\\t")); break;
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case '\\': stream.print(F("\\")); break;
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default: stream.print(c);
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}
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}
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