Use the functions from the libxml2 library to parse the nodes (keys) in an XML file, including child keys, attributes, and their contents. By examining the sample code in this video, a C programmer can easily extract data from an XML file.
- For the color presented in this movie I'll … be examining the sample XML file shown here. … It contains nested tags, attributes and content. … To exam the file in your code use the XML 2 library … to parse the XML file. … The basic parsing structure is shown here in this … source code file. … The xmlDocPtr doc variable doc is returned … from the xmlParseFile function at line 13. … Here I'm only fetching the root element or node … shown at line 21. … At line 28 the root nodes name is output. … I've already compiled and linked the source code … so I'm just going to run the program. … And you see that the correct root node name person is output … In this modification to the code I've added a recursive … function dump_elements which is shown at line 45. … This function cascades through all the nodes in the XML … file displaying each one. … The current next variable at line 50 references … subsequent nodes similar to the way a linked list … works in C. … And here you see the full list of nodes. …
Author
Dan Gookin
Released
10/1/2019- Finding, installing, and linking libraries
- Accessing and generating XML data
- Working with JSON
- Working with the libcurl library
- Text programming
- Reading, writing, and manipulating JPEG images
- Working with PNG images
Skill Level Advanced
Duration
Views
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Introduction
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Using the exercise files1m 2s
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Working with the code2m 45s
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1. Setup and Configuration
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Understanding libraries2m 50s
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Finding a C library2m 44s
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Installing a library4m 15s
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Liking a library: IDE4m 10s
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2. Data Structures
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Understanding XML2m 23s
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Accessing XML data3m 26s
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Generating XML data3m 57s
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Working with JSON2m 39s
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Accessing JSON data3m 10s
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Reading JSON data3m 46s
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Creating JSON output3m 35s
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3. Web Access
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Testing libcurl2m 3s
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Fetching a web page3m 47s
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Saving web data3m 31s
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Sending data2m 35s
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4. Text Programming
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Working with wide characters3m 19s
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Building an ncurses program2m 27s
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Controlling the text screen2m 32s
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Making color text2m 56s
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Exploring ncurses input4m 6s
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5. Computer Graphics
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Accessing a JPEG2m 31s
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Manipulating JPEG images3m 5s
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Working with PNG images3m 57s
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Modifying a PNG image2m 26s
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Conclusion
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Writing your own library4m 19s
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Next steps1m 17s
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Video: Accessing XML data