I'm aware of fonts such as cmr10, cmex10 and cmsy10. Right now I would like to know how to use TeX to produce symbols in the character tables such as http://www.math.union.edu/~dpvc/jsmath/symbols/cmex10.html
Is there a dictionary somewhere on the internet containing how to TeX every symbol in character tables given the font? (i.e. Given '\0x41' and the font cmr10 I want to obtain 'A', given '\0x00' and cmr10 I want to obtain '\textGamma').
P.S. This question is motivated by my attempts to extract text from .tex files. I end up deciding to first convert .tex files to DVI files and then use
dviasm to extract the text because it bypasses the need to essentially build another TeX engine.