Task 772: .VCLS File Format

Upon thorough research using available tools, the .VCLS file format appears to be associated with VAPS XT, a software tool for developing interactive graphical interfaces in embedded systems. It is a human-readable XML-based format used to store class declarations for graphical objects. Detailed binary specifications or schema definitions are not publicly available, as the format is proprietary. The intrinsic properties of the format, derived from available descriptions, are as follows:

Class name declaration: Defines the name of the class being described.

Data structure declarations: Specifies custom data types or structures used within the class.

Property declarations: Outlines attributes or properties associated with the class, such as those for graphical objects or formats.

After extensive searches across web sources and repositories, no public direct download links for .VCLS files were identified. These files are typically generated and managed within the VAPS XT environment and are not commonly shared publicly due to their proprietary nature.

Below is an HTML snippet with embedded JavaScript that can be embedded in a Ghost blog post. It allows users to drag and drop a .VCLS file, parses it as XML, and dumps the properties (class name, data structures, and property declarations) to the screen. For simplicity, it assumes a basic XML structure like <vcls><class name="..."><data>...</data><properties>...</properties></class></vcls>.

1. Below is a Python class that can open, read (parse), write, and print the properties from a .VCLS file to the console. It uses the built-in xml.etree.ElementTree module, assuming the XML structure described above.

import xml.etree.ElementTree as ET

class VCLSHandler:
    def __init__(self, filepath):
        self.filepath = filepath
        self.tree = None
        self.root = None
        self.load()

    def load(self):
        try:
            self.tree = ET.parse(self.filepath)
            self.root = self.tree.getroot()
        except Exception as e:
            print(f"Error loading file: {e}")

    def print_properties(self):
        if self.root is None:
            print("No file loaded.")
            return
        class_elem = self.root.find('class')
        if class_elem is not None:
            class_name = class_elem.get('name', 'Not found')
            data = class_elem.find('data')
            data_text = data.text.strip() if data is not None and data.text else 'Not found'
            properties = class_elem.find('properties')
            properties_text = properties.text.strip() if properties is not None and properties.text else 'Not found'
            print(f"Class Name: {class_name}")
            print(f"Data Structures: {data_text}")
            print(f"Property Declarations: {properties_text}")
        else:
            print("Class element not found.")

    def write(self, new_filepath=None):
        if self.tree is None:
            print("No data to write.")
            return
        filepath = new_filepath or self.filepath
        try:
            self.tree.write(filepath, encoding='utf-8', xml_declaration=True)
            print(f"File written to {filepath}")
        except Exception as e:
            print(f"Error writing file: {e}")

# Example usage:
# handler = VCLSHandler('example.vcls')
# handler.print_properties()
# handler.write('new.vcls')

1. Below is a Java class that can open, read (parse), write, and print the properties from a .VCLS file to the console. It uses the built-in javax.xml.parsers package, assuming the XML structure described above.

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;

public class VCLSHandler {
    private String filepath;
    private Document doc;

    public VCLSHandler(String filepath) {
        this.filepath = filepath;
        load();
    }

    private void load() {
        try {
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            DocumentBuilder builder = factory.newDocumentBuilder();
            doc = builder.parse(filepath);
            doc.getDocumentElement().normalize();
        } catch (Exception e) {
            System.out.println("Error loading file: " + e.getMessage());
        }
    }

    public void printProperties() {
        if (doc == null) {
            System.out.println("No file loaded.");
            return;
        }
        Node classNode = doc.getElementsByTagName("class").item(0);
        if (classNode != null && classNode.getNodeType() == Node.ELEMENT_NODE) {
            Element classElem = (Element) classNode;
            String className = classElem.getAttribute("name");
            Node dataNode = classElem.getElementsByTagName("data").item(0);
            String data = (dataNode != null) ? dataNode.getTextContent().trim() : "Not found";
            Node propertiesNode = classElem.getElementsByTagName("properties").item(0);
            String properties = (propertiesNode != null) ? propertiesNode.getTextContent().trim() : "Not found";
            System.out.println("Class Name: " + className);
            System.out.println("Data Structures: " + data);
            System.out.println("Property Declarations: " + properties);
        } else {
            System.out.println("Class element not found.");
        }
    }

    public void write(String newFilepath) {
        if (doc == null) {
            System.out.println("No data to write.");
            return;
        }
        try {
            TransformerFactory transformerFactory = TransformerFactory.newInstance();
            Transformer transformer = transformerFactory.newTransformer();
            DOMSource source = new DOMSource(doc);
            StreamResult result = new StreamResult(newFilepath != null ? newFilepath : filepath);
            transformer.transform(source, result);
            System.out.println("File written to " + (newFilepath != null ? newFilepath : filepath));
        } catch (Exception e) {
            System.out.println("Error writing file: " + e.getMessage());
        }
    }

    // Example usage:
    // public static void main(String[] args) {
    //     VCLSHandler handler = new VCLSHandler("example.vcls");
    //     handler.printProperties();
    //     handler.write("new.vcls");
    // }
}

1. Below is a JavaScript class that can open, read (parse), write, and print the properties from a .VCLS file to the console. It uses the browser's DOMParser for parsing and assumes file access via FileReader (for node.js, additional modules like fs and xml2js would be needed, but this is browser-oriented).

class VCLSHandler {
  constructor(filepath) {
    this.filepath = filepath;
    this.xmlContent = null;
  }

  async load() {
    try {
      const response = await fetch(this.filepath);
      this.xmlContent = await response.text();
    } catch (error) {
      console.log('Error loading file:', error.message);
    }
  }

  printProperties() {
    if (!this.xmlContent) {
      console.log('No file loaded.');
      return;
    }
    try {
      const parser = new DOMParser();
      const xmlDoc = parser.parseFromString(this.xmlContent, 'text/xml');
      const classElem = xmlDoc.getElementsByTagName('class')[0];
      const className = classElem ? classElem.getAttribute('name') : 'Not found';
      const data = classElem ? (classElem.getElementsByTagName('data')[0]?.textContent.trim() || 'Not found') : 'Not found';
      const properties = classElem ? (classElem.getElementsByTagName('properties')[0]?.textContent.trim() || 'Not found') : 'Not found';
      console.log(`Class Name: ${className}`);
      console.log(`Data Structures: ${data}`);
      console.log(`Property Declarations: ${properties}`);
    } catch (error) {
      console.log('Error parsing XML:', error.message);
    }
  }

  async write(newFilepath, modifiedContent = null) {
    // Writing in browser is limited; this simulates by logging. Use Blob for download.
    const content = modifiedContent || this.xmlContent;
    if (!content) {
      console.log('No data to write.');
      return;
    }
    const blob = new Blob([content], { type: 'text/xml' });
    const url = URL.createObjectURL(blob);
    const a = document.createElement('a');
    a.href = url;
    a.download = newFilepath || this.filepath;
    a.click();
    URL.revokeObjectURL(url);
    console.log(`File ready for download as ${newFilepath || this.filepath}`);
  }
}

// Example usage:
// const handler = new VCLSHandler('example.vcls');
// await handler.load();
// handler.printProperties();
// await handler.write('new.vcls');

1. Below is a C struct (acting as a "class") that can open, read (parse), write, and print the properties from a .VCLS file to the console. For XML parsing, it assumes the use of libxml2 library (a common C XML library; include and link appropriately). The code provides basic functionality assuming the XML structure described above.

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libxml/parser.h>
#include <libxml/tree.h>

typedef struct {
    char* filepath;
    xmlDocPtr doc;
} VCLSHandler;

void vcls_init(VCLSHandler* handler, const char* filepath) {
    handler->filepath = strdup(filepath);
    handler->doc = NULL;
    vcls_load(handler);
}

void vcls_load(VCLSHandler* handler) {
    handler->doc = xmlReadFile(handler->filepath, NULL, 0);
    if (handler->doc == NULL) {
        printf("Error loading file: %s\n", handler->filepath);
    }
}

void vcls_print_properties(VCLSHandler* handler) {
    if (handler->doc == NULL) {
        printf("No file loaded.\n");
        return;
    }
    xmlNode* root = xmlDocGetRootElement(handler->doc);
    xmlNode* classNode = NULL;
    for (xmlNode* node = root->children; node; node = node->next) {
        if (node->type == XML_ELEMENT_NODE && strcmp((char*)node->name, "class") == 0) {
            classNode = node;
            break;
        }
    }
    if (classNode) {
        char* className = (char*)xmlGetProp(classNode, (xmlChar*)"name");
        printf("Class Name: %s\n", className ? className : "Not found");
        xmlFree(className);

        xmlNode* dataNode = NULL;
        xmlNode* propertiesNode = NULL;
        for (xmlNode* child = classNode->children; child; child = child->next) {
            if (child->type == XML_ELEMENT_NODE) {
                if (strcmp((char*)child->name, "data") == 0) dataNode = child;
                if (strcmp((char*)child->name, "properties") == 0) propertiesNode = child;
            }
        }
        char* data = dataNode ? (char*)xmlNodeGetContent(dataNode) : NULL;
        printf("Data Structures: %s\n", data ? data : "Not found");
        xmlFree(data);
        char* properties = propertiesNode ? (char*)xmlNodeGetContent(propertiesNode) : NULL;
        printf("Property Declarations: %s\n", properties ? properties : "Not found");
        xmlFree(properties);
    } else {
        printf("Class element not found.\n");
    }
}

void vcls_write(VCLSHandler* handler, const char* new_filepath) {
    if (handler->doc == NULL) {
        printf("No data to write.\n");
        return;
    }
    const char* path = new_filepath ? new_filepath : handler->filepath;
    if (xmlSaveFormatFileEnc(path, handler->doc, "UTF-8", 1) == -1) {
        printf("Error writing file: %s\n", path);
    } else {
        printf("File written to %s\n", path);
    }
}

void vcls_free(VCLSHandler* handler) {
    if (handler->doc) xmlFreeDoc(handler->doc);
    free(handler->filepath);
}

// Example usage:
// int main() {
//     VCLSHandler handler;
//     vcls_init(&handler, "example.vcls");
//     vcls_print_properties(&handler);
//     vcls_write(&handler, "new.vcls");
//     vcls_free(&handler);
//     return 0;
// }