sed，awk，regex修改化学术语

Question

My platform: Windows 7, 64 bit; 8 GB memory; GNUwin32; sed 4.1.5.4013; awk 3.1.6.2962.

My problem: long chemical terms.

Example_1_: 4-((((2-chloroethyl)nitrosoamino)carbonyl)methylamino)cyclohexanecarboxylic acid.

Example_2_: 3'-O-(3-(N-(4-azido-2-nitrophenyl)amino)propionyl)adenosine-5'-triphosphate.

Example_3_: 2-((2-chloroethyl)methylamino)ethyl-4-ethoxybenzoate.

Want to introduce <wbr> to give browser opportunity to break a long chemical term.

Want to break after right paren.

However, only want to introduce <wbr> if the chemical term has 3 or more right parens.

Further, if chemical term has three or more right parens, only want to introduce <wbr> for the last two right parens. Reason: do not want to wrap a term to more than three lines.

Example_1_ would look like this: 4-((((2-chloroethyl)nitrosoamino)carbonyl)`<wbr>`methylamino)`<wbr>`cyclohexanecarboxylic acid.

Example_2_ would look like this: 3'-O-(3-(N-(4-azido-2-nitrophenyl)amino)`<wbr>`propionyl)`<wbr>`adenosine-5'-triphosphate

Example_3_ would not be modified because it does not have 3 or more right parens.

How to use sed , awk , regex to implement the above?

Thanks in advance for advice.

Answer 1

Thanks for a clear explanation. This seems to work. I don't have exactly your version of sed.

sed 's/)\([^)]*)\)\([^)]*)\)\([^)]*\)$/)\1`<wbr>`\2`<wbr>`\3/' data.txt

You did not say which shell you're using. This is for bash and similar. For Windows CMD, try double quotes.