how does the wireshark print the contents of the packets

[刘昆 <liukunmeister () gmail com>]

If I want to understand how the wireshark print the contents of the
packets wireshark just as the table at the bottom in wireshark GUI,which
files should I read. In fact,I just want to find out the array which
save the data of the packet wireshark has captured so that I can do some
work with the data.As http protocol,should I read the files
packet-http.c under the directory wireshark/epan/dissectors or other files?
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