Regular Expressions

• Critical needed component for data extraction and manipulation
• Will be used to create our graph markup language
• Expressions are needed for parsing delimiter file formats and custom languages

Match Single

• Provide character buffer and regular expression pattern
• Compile the regular expression and check for errors
• iterate through the character buffer with the match pattern
• Allocate space for end and start match
• Gather the token results from the end and start match
• Add the token to the array based set
• Add the end match to the buffer (pointer arithmetic)
• Compare the match with another sub string
• If the compare is true, break out of the loop

Replace Character

• Provide a buffer, the string and the portion to replace (with regex pattern)
• Set string equal to character pointer
• Start with a do statement, within the statement
• while the character pointer is equal to the character to remove
• Increment the character pointer (arithmetic)
• while(*test_string++ = *d++)