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How to mention in the lex grammar to give the input as a char[] and get output as char[]?

Posted on 2008-09-29
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Last Modified: 2013-11-18
I have written a lex grammar which takes the input from stdin and output to stdout. But I want to pass the input as char[] (eg: char *input_buffer, int input_length) and get output as char[] (eg: char *output_buffer, int output_length). Anyone please help me out this.
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Question by:anton_shiban
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Infinity08 earned 750 total points
ID: 22603481
The obvious way would be to create a file with the string, and then feed that to the scanner (similar for output).

Alternatively, you could re-define the input() function (or the YY_INPUT macro for flex) to get your input from the string instead of the file stream.
There's no such thing for output though. But generally, the output of a scanner is fed to a parser (generated by yacc for example), so that shouldn't be an issue ... right ?
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by:Infinity08
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May I ask why you gave a B grade ? That usually means that something was missing in the answer and/or that something is still unclear. If so, please feel free to ask for clarification where needed.
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