104 lines
2.3 KiB
C++
104 lines
2.3 KiB
C++
/*
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* Copyright (C) EdgeTX
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*
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* Based on code named
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* opentx - https://github.com/opentx/opentx
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* th9x - http://code.google.com/p/th9x
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* er9x - http://code.google.com/p/er9x
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* gruvin9x - http://code.google.com/p/gruvin9x
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*
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* License GPLv2: http://www.gnu.org/licenses/gpl-2.0.html
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program 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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#pragma once
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#include <stdint.h>
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#define MAX_STR 256
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#define MAX_DEPTH 16 // 12 real + 4 virtual
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struct YamlParserCalls
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{
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bool (*to_parent) (void* ctx);
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bool (*to_child) (void* ctx);
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bool (*to_next_elmt) (void* ctx);
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bool (*find_node) (void* ctx, char* buf, uint8_t len);
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void (*set_attr) (void* ctx, char* buf, uint16_t len);
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};
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class YamlParser
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{
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enum ParserState {
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ps_Indent=0,
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ps_Dash,
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ps_Attr,
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ps_AttrQuo,
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ps_AttrSP,
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ps_Sep,
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ps_Val,
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ps_ValEsc,
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ps_ValQuo,
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ps_ValEsc1,
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ps_ValEsc2,
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ps_ValEsc3,
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ps_CRLF
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};
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// last indents for each level
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uint8_t indents[MAX_DEPTH];
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// current indent
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uint8_t indent;
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// current level
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uint8_t level;
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// parser state
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uint8_t state;
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uint8_t saved_state;
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// scratch buffer w/ 16 bytes
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// used for attribute and values
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char scratch_buf[MAX_STR];
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uint16_t scratch_len;
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bool node_found;
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bool eof;
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// tree iterator state
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const YamlParserCalls* calls;
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void* ctx;
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// Reset parser state for next line
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void reset();
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bool toChild();
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bool toParent();
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uint8_t getLastIndent();
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public:
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enum YamlResult {
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DONE_PARSING,
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CONTINUE_PARSING,
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STRING_OVERFLOW
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};
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YamlParser();
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void init(const YamlParserCalls* parser_calls, void* parser_ctx);
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YamlResult parse(const char* buffer, unsigned int size);
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void set_eof() { eof = true; }
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};
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