mirror of
https://github.com/Ttanasart-pt/Pixel-Composer.git
synced 2024-11-15 06:53:59 +01:00
307 lines
13 KiB
Plaintext
307 lines
13 KiB
Plaintext
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// Feather disable all
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/// Decodes XML data stored in a buffer and outputs a sorta-JSON equivalent
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///
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/// @return Nested struct/array data that represents the contents of the XML data
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///
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/// @param buffer Buffer to read data from
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/// @param offset Offset in the buffer to read data from
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///
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/// @jujuadams 2022-10-30
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function SnapBufferReadXML(_buffer, _offset, _size)
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{
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var _oldOffset = buffer_tell(_buffer);
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buffer_seek(_buffer, buffer_seek_start, _offset);
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var _skip_whitespace = true;
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var _in_key = false;
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var _key_start = -1;
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var _key = "";
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var _in_value = false;
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var _in_string = false;
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var _string_start = 0;
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var _value = "";
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var _in_text = false;
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var _text = "";
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var _text_has_ampersand = false;
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var _text_start = 0;
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var _in_tag = false;
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var _tag = undefined;
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var _tag_terminating = false;
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var _tag_self_terminating = false;
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var _tag_is_prolog = false;
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var _tag_is_comment = false;
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var _tag_terminating = false;
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var _tag_start = 0;
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var _tag_reading_attributes = false;
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var _tag_has_attributes = false;
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var _root = {
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type: "root",
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};
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var _stack_parent = undefined;
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var _stack_top =_root;
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var _stack = ds_list_create();
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ds_list_add(_stack, _stack_top);
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repeat(_size)
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{
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var _value = buffer_read(_buffer, buffer_u8);
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if (_skip_whitespace && (_value > 32)) _skip_whitespace = false;
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if (!_skip_whitespace)
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{
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if (_in_tag)
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{
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if (_in_key)
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{
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if ((_value == ord("/")) || (_value == ord("?")))
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{
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_in_key = false;
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if (_value == ord("/")) _tag_terminating = true;
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}
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else if ((_value == ord(" ")) || (_value == ord("=")))
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{
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buffer_poke(_buffer, buffer_tell(_buffer)-1, buffer_u8, 0x0);
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buffer_seek(_buffer, buffer_seek_start, _key_start);
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_key = buffer_read(_buffer, buffer_string);
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_in_key = false;
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_in_value = true;
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}
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else if (_key_start < 0)
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{
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_key_start = buffer_tell(_buffer) - 1;
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}
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}
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else if (_in_value)
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{
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if (_in_string)
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{
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if (_value == ord("&")) //Check for ampersands so we can trigger a find-replace on the output value
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{
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_text_has_ampersand = true;
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}
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else if (_value == ord("\"")) //End string
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{
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buffer_poke(_buffer, buffer_tell(_buffer)-1, buffer_u8, 0x0);
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buffer_seek(_buffer, buffer_seek_start, _string_start);
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var _substring = buffer_read(_buffer, buffer_string);
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if (_text_has_ampersand) //Only run these checks if we found an ampersand
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{
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_substring = string_replace_all(_substring, "<" , "<");
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_substring = string_replace_all(_substring, ">" , ">");
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_substring = string_replace_all(_substring, "&" , "&");
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_substring = string_replace_all(_substring, "'", "'");
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_substring = string_replace_all(_substring, """, "\"");
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}
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if (!_tag_is_comment)
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{
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if (!variable_struct_exists(_stack_top, "attributes")) _stack_top.attributes = {};
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_stack_top.attributes[$ _key] = _substring;
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}
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_in_key = true;
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_key_start = -1;
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_in_string = false;
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_skip_whitespace = true;
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}
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}
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else if (_value == ord("\"")) //Start the value reading at the quote mark
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{
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_in_string = true;
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_string_start = buffer_tell(_buffer);
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}
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}
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else
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{
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switch(_value)
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{
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case ord("?"): //Prolog indicator
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if (buffer_tell(_buffer) == _tag_start + 1) _tag_is_prolog = true;
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break;
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case ord("!"): //Comment indicator
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if (buffer_tell(_buffer) == _tag_start + 1) _tag_is_comment = true;
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break;
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case ord("/"): //Close tag indicator
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if (buffer_tell(_buffer) == _tag_start + 1)
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{
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_tag_terminating = true;
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}
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else
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{
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if ((_tag == undefined) && (buffer_tell(_buffer) > _tag_start))
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{
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_tag_terminating = true;
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buffer_poke(_buffer, buffer_tell(_buffer)-1, buffer_u8, 0x0);
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buffer_seek(_buffer, buffer_seek_start, _tag_start);
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_tag = buffer_read(_buffer, buffer_string);
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buffer_poke(_buffer, buffer_tell(_buffer)-1, buffer_u8, _value);
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_stack_top = {
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type: _tag,
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};
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ds_list_insert(_stack, 0, _stack_top);
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if (!variable_struct_exists(_stack_parent, "children")) _stack_parent.children = [];
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array_push(_stack_parent.children, _stack_top);
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_in_key = true;
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_key_start = -1;
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_tag_reading_attributes = true;
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_skip_whitespace = true;
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}
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}
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break;
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case ord(" "):
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if (!_tag_is_prolog)
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{
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buffer_poke(_buffer, buffer_tell(_buffer)-1, buffer_u8, 0x0);
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buffer_seek(_buffer, buffer_seek_start, _tag_start);
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_tag = buffer_read(_buffer, buffer_string);
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}
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if (!_tag_is_comment && !_tag_terminating)
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{
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_stack_top = {
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type: (_tag_is_prolog? "prolog" : _tag),
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};
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ds_list_insert(_stack, 0, _stack_top);
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if (_tag_is_prolog)
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{
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_stack_parent.prolog = _stack_top;
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}
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else
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{
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if (!variable_struct_exists(_stack_parent, "children")) _stack_parent.children = [];
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array_push(_stack_parent.children, _stack_top);
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}
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}
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_in_key = true;
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_key_start = -1;
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_tag_reading_attributes = true;
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_skip_whitespace = true;
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break;
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}
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}
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if (!_in_string && (_value == ord(">")))
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{
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if (!_tag_reading_attributes && !_tag_is_comment)
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{
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if (!_tag_is_prolog && (_tag == undefined))
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{
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buffer_poke(_buffer, buffer_tell(_buffer)-1, buffer_u8, 0x0);
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buffer_seek(_buffer, buffer_seek_start, _tag_start);
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_tag = buffer_read(_buffer, buffer_string);
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}
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if (!_tag_terminating)
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{
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_stack_top = {
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type: (_tag_is_prolog? "prolog" : _tag),
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};
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ds_list_insert(_stack, 0, _stack_top);
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if (_tag_is_prolog)
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{
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_stack_parent.prolog = _stack_top;
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}
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else
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{
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if (!variable_struct_exists(_stack_parent, "children")) _stack_parent.children = [];
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array_push(_stack_parent.children, _stack_top);
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}
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}
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}
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var _previous_value = buffer_peek(_buffer, buffer_tell(_buffer)-2, buffer_u8);
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if (_previous_value == ord("?")) //Detect ?> method to close the prolog
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{
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_tag_terminating = true;
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}
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else if (_previous_value == ord("/")) //Detect /> method to close a tag
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{
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_tag_terminating = true;
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_tag_self_terminating = true;
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}
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if (!_tag_is_comment && (!_tag_self_terminating || _tag_reading_attributes))
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{
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if (_tag_terminating || _tag_is_prolog)
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{
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ds_list_delete(_stack, 0);
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_stack_top = _stack[| 0];
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}
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else
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{
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_in_text = true;
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_text_has_ampersand = false;
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_text_start = buffer_tell(_buffer);
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}
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}
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if (!_tag_is_comment || (_tag_is_comment && _previous_value == ord("-")))
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{
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_tag = undefined;
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_in_tag = false;
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_in_key = false;
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_in_value = false;
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}
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}
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}
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else if ((_value == 10) || (_value == 13)) //Newline
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{
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_in_text = false;
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_skip_whitespace = true;
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}
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else if (_value == ord("<")) //Open a tag
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{
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if (_in_text)
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{
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_in_text = false;
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buffer_poke(_buffer, buffer_tell(_buffer)-1, buffer_u8, 0x0);
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buffer_seek(_buffer, buffer_seek_start, _text_start);
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_text = buffer_read(_buffer, buffer_string);
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_stack_top.text = _text;
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}
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_stack_parent = _stack_top;
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_in_tag = true;
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_tag_terminating = false;
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_tag_self_terminating = false;
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_tag_is_prolog = false;
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_tag_is_comment = false;
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_tag_terminating = false;
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_tag_reading_attributes = false;
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_tag_has_attributes = false;
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_tag_start = buffer_tell(_buffer);
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}
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}
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}
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ds_list_destroy(_stack);
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buffer_seek(_buffer, buffer_seek_start, _oldOffset);
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return _root;
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}
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