Difflib from python in C?

[xchg]

Hi,

I am writing web security tool in C and I need to compare pages depending on variable input values. But modern web pages change content after each refresh (counters, clocks, ads ...) so it's hard to determine which of content changes are depending on user input and which are not. I've found python library difflib with SequenceMatcher class (sqlmap is also using it) which can be really helpful. It compares two data structures (e.g strings) and than returns float (0-1) indicating how different they are. Is there something similar I can use in C? Or I have to port this library in C myself?

[ssharish2005]

Its quite difficult to understand what your looking for. But in term of comparing the only library function which i can think of strcmp/strncmp the nearest. I don’t think there is anything as such as the difflib does in C. Unless anyone else might know any of library which do the text difference.

ssharish

[xchg]

I am just searching for python's difflib sequencematcher alternative for C OR some other way to determine if page content was modified after input change (on pages that change content on every refresh). I know difflib method isn't 100 %, but I've checked sqlmap and it works pretty well. If I wasn't clear.

[C_ntua]

Maybe you can give some code and people can translate it to C. If you use a function or a class with a specific way it might be able to easily be reproduced in C

[xchg]

I know C pretty well. In fact, don't know python at all. I don't have problem with translating python to C, but i want to aviod this. I just want to know if there is some library in C which provides api like SequenceMatcher class in difflib python library. Look at my previous post.

[xchg]

I've found something that helped me. Just google for
Ratcliff/Obershelp pattern recognition and Levenshtein distance