mirror of
https://github.com/RobTillaart/Arduino.git
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430 lines
8.7 KiB
C++
430 lines
8.7 KiB
C++
//
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// FILE: XMLWriter.cpp
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// AUTHOR: Rob Tillaart
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// VERSION: 0.3.1
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// DATE: 2013-11-06
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// PURPOSE: Arduino library for creating XML
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//
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// HISTORY:
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// 0.1.00 2013-11-06 initial version
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// 0.1.01 2013-11-07 rework interfaces
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// 0.1.02 2013-11-07 +setIndentSize(), corrected history, +escape support
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// 0.1.03 2015-03-07 refactored - footprint + interface
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// 0.1.04 2015-05-21 refactored - reduce RAM -> used F() macro etc.
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// 0.1.05 2015-05-23 added XMLWRITER_MAXTAGSIZE 15 (to support KML coordinates tag)
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// 0.1.6 2016-03-16 added incrIndent(), decrIndent(), indent(), raw();
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// 0.1.7 2017-07-26 added const where possible
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// 0.1.8 2017-12-09 fix casting issue #83 (long -> int32_t);
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// 0.1.9 2017-12-09 add PROGMEM support for escape() strings
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// 0.2.0 2020-04-24 refactor, added examples, #pragma, print as base class
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// 0.2.1 2020-04-26 performance optimized, setconfig() + newLine() added
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// 0.2.2 2020-04-29 dynamic buffer size in constructor
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// 0.2.3 2020-06-19 fix library.json
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// 0.2.4 2020-07-07 fix #6 Print interface made public
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// 0.3.0 2021-01-09 Arduino-ci + unit tests
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// add getIndentSize(); version(); debug();
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// 0.3.1 2021-11-11 refactor naming to improve readability
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// update build-CI,
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// update readme.md, Badges.
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//
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#include "XMLWriter.h"
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XMLWriter::XMLWriter(Print* stream, uint8_t bufferSize)
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{
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_bufferSize = constrain(bufferSize, 2, 250);
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_buffer = (char *) malloc(_bufferSize);
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_stream = stream;
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reset();
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}
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XMLWriter::~XMLWriter()
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{
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if (_buffer != NULL) free(_buffer);
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}
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void XMLWriter::reset()
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{
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_indent = 0;
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_indentStep = 2;
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_tagIndex = 0;
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_bufferIndex = 0;
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_config = XMLWRITER_COMMENT | XMLWRITER_INDENT | XMLWRITER_NEWLINE;
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_bytesOut = 0;
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}
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void XMLWriter::header()
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{
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print(F("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"));
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}
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void XMLWriter::version()
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{
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print(F("<!-- "));
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print(F(" XMLWRITER_VERSION: "));
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print(XMLWRITER_VERSION);
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print(F(" -->\n"));
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}
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void XMLWriter::debug()
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{
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print(F("<!-- "));
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print('\n');
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print(F(" VERSION: "));
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println(XMLWRITER_VERSION);
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print(F("MAXLEVEL: "));
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println(XMLWRITER_MAXLEVEL);
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print(F(" TAGSIZE: "));
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println(XMLWRITER_MAXTAGSIZE);
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print(F(" CONFIG: "));
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println(_config, HEX);
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print(F(" INDENT: "));
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println(_indent);
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print(F(" BUFSIZE: "));
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println(_bufferSize);
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print(F(" -->\n"));
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}
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void XMLWriter::comment(const char* text, const bool multiLine)
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{
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if (_config & XMLWRITER_COMMENT)
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{
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print('\n');
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if (!multiLine) indent();
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print(F("<!-- "));
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if (multiLine) print('\n');
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print(text);
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if (multiLine) print('\n');
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print(F(" -->\n"));
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}
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}
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void XMLWriter::newLine(uint8_t n)
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{
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if (_config & XMLWRITER_NEWLINE)
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{
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while(n--) print('\n');
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}
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}
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void XMLWriter::tagOpen(const char* tag, const bool newline)
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{
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tagOpen(tag, "", newline);
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}
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void XMLWriter::tagOpen(const char* tag, const char* name, const bool newline)
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{
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if (_tagIndex > XMLWRITER_MAXLEVEL)
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{
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comment("MAXLEVEL exceeded.");
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comment(tag);
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comment(name);
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flush();
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return;
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}
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if (strlen(tag) > XMLWRITER_MAXTAGSIZE)
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{
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comment("MAXTAGSIZE exceeded.");
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comment(tag);
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flush();
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return;
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}
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strcpy(_tagStack[_tagIndex++], tag);
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tagStart(tag);
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if (name[0] != 0) tagField("name", name);
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tagEnd(newline, NOSLASH);
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_indent += _indentStep;
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}
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void XMLWriter::tagClose(const bool ind)
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{
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_indent -= _indentStep;
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if (ind) indent();
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print("</");
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print(_tagStack[--_tagIndex]);
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print(">\n");
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}
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void XMLWriter::tagStart(const char *tag)
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{
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indent();
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print('<');
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print(tag);
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}
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void XMLWriter::tagField(const char *field, const char* str)
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{
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print(' ');
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print(field);
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print("=\"");
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#ifdef XMLWRITER_ESCAPE_SUPPORT
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escape(str);
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#else
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print(str);
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#endif
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print('"');
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}
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void XMLWriter::tagEnd(const bool newline, const bool addSlash)
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{
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if (addSlash) print("/>");
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else print('>');
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if (newline) print('\n');
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}
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void XMLWriter::writeNode(const char* tag, const char* str)
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{
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tagOpen(tag, "", NONEWLINE);
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#ifdef XMLWRITER_ESCAPE_SUPPORT
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escape(str);
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#else
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print(str);
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#endif
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tagClose(NOINDENT);
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}
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///////////////////////////////////////////////////////////////
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//
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// TAGFIELD
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//
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void XMLWriter::tagField(const char *field, const uint8_t value, const uint8_t base)
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{
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tagField(field, (uint32_t) value, base);
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}
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void XMLWriter::tagField(const char *field, const uint16_t value, const uint8_t base)
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{
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tagField(field, (uint32_t) value, base);
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}
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void XMLWriter::tagField(const char *field, const uint32_t value, const uint8_t base)
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{
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print(' ');
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print(field);
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print("=\"");
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print(value, base);
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print('"');
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}
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void XMLWriter::tagField(const char *field, const int8_t value, const uint8_t base)
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{
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tagField(field, (int32_t) value, base);
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}
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void XMLWriter::tagField(const char *field, const int16_t value, const uint8_t base)
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{
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tagField(field, (int32_t) value, base);
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}
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void XMLWriter::tagField(const char *field, const int value, const int base)
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{
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tagField(field, (int32_t) value, (uint8_t) base);
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}
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void XMLWriter::tagField(const char *field, const int32_t value, const uint8_t base)
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{
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print(' ');
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print(field);
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print("=\"");
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print(value, base);
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print('"');
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}
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void XMLWriter::tagField(const char *field, const bool value)
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{
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print(' ');
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print(field);
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// F() is slower & uses less RAM but 15 bytes saved
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print(value ? F("=\"true\"") : F("=\"false\""));
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}
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void XMLWriter::tagField(const char *field, const double value, const uint8_t decimals)
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{
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print(' ');
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print(field);
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print(F("=\""));
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print(value, decimals);
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print('"');
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}
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///////////////////////////////////////////////////////////////
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//
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// WRITENODE
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//
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void XMLWriter::writeNode(const char* tag, const uint8_t value, const uint8_t base)
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{
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writeNode(tag, (uint32_t) value, base);
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}
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void XMLWriter::writeNode(const char* tag, const uint16_t value, const uint8_t base)
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{
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writeNode(tag, (uint32_t) value, base);
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}
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void XMLWriter::writeNode(const char* tag, const uint32_t value, const uint8_t base)
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{
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tagOpen(tag, "", NONEWLINE);
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print(value, base);
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tagClose(NOINDENT);
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}
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void XMLWriter::writeNode(const char* tag, const int8_t value, const uint8_t base)
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{
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writeNode(tag, (int32_t) value, base);
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}
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void XMLWriter::writeNode(const char* tag, const int16_t value, const uint8_t base)
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{
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writeNode(tag, (int32_t) value, base);
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}
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void XMLWriter::writeNode(const char* tag, const int value, const int base)
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{
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writeNode(tag, (int32_t) value, (uint8_t) base);
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}
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void XMLWriter::writeNode(const char* tag, const int32_t value, const uint8_t base)
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{
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tagOpen(tag, "", NONEWLINE);
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print(value, base);
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tagClose(NOINDENT);
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}
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void XMLWriter::writeNode(const char* tag, const bool value)
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{
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tagOpen(tag, "", NONEWLINE);
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// F() is slower & uses less RAM but saves 9 bytes
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print(value ? F("true") : F("false"));
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tagClose(NOINDENT);
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}
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void XMLWriter::writeNode(const char* tag, const double value, const uint8_t decimals)
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{
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tagOpen(tag, "", NONEWLINE);
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print(value, decimals);
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tagClose(NOINDENT);
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}
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void XMLWriter::indent()
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{
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if (_config & XMLWRITER_INDENT)
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{
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// as indentation is a multiple of 2
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// this is nice balance between speed and RAM.
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for (uint8_t i = _indent; i > 0; i-= 2) print(" ");
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}
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}
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size_t XMLWriter::write(uint8_t c)
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{
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_buffer[_bufferIndex++] = c;
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if (_bufferIndex == (_bufferSize - 1)) flush();
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return 1;
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};
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void XMLWriter::flush()
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{
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_bytesOut += _bufferIndex;
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if (_bufferIndex > 0)
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{
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_buffer[_bufferIndex] = 0;
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_stream->write(_buffer, _bufferIndex); // saves ~40 bytes on UNO.
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// _stream->print(_buffer);
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_bufferIndex = 0;
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}
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};
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////////////////////////////////////////////////////////////////////
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//
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// ESCAPE
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//
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#ifdef XMLWRITER_ESCAPE_SUPPORT
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static char c[6] = "\"\'<>&";
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#ifdef __PROGMEM__
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PROGMEM const char quote[] = """;
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PROGMEM const char apostrophe[] = "'";
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PROGMEM const char lessthen[] = "<";
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PROGMEM const char greaterthen[] = ">";
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PROGMEM const char ampersand[] = "&";
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PROGMEM const char* const expanded[] =
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{
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quote, apostrophe, lessthen, greaterthen, ampersand
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};
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#else
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// NOTE: & and ; are handled in code. // 25 bytes RAM
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static char expanded[][5] = { "quot", "apos","lt","gt","amp"};
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#endif
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void XMLWriter::escape(const char* str)
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{
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char* p = (char *)str;
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while (*p != 0)
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{
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char* q = strchr(c, *p);
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if (q == NULL) print(*p);
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#ifdef __PROGMEM__
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else
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{
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char buf[8];
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strcpy_P(buf, (char*)pgm_read_word(&(expanded[q - c])));
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print(buf);
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}
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#else
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else
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{
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print('&');
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print(expanded[q - c]); // uint8_t idx = q-c;
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print(';');
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}
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#endif
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p++;
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}
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}
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#endif
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// -- END OF FILE --
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