How to parse a string efficiently Post: 302194620

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Top Forums Shell Programming and Scripting How to parse a string efficiently Post 302194620 by sandiego_coder on Tuesday 13th of May 2008 09:53:46 AM

05-13-2008

Registered User

How to parse a string efficiently

I am new to the boards and to shell programming and have a requirement to name new files received with a unique sequence number. I need to look at a particular file pattern that exists and then to increment a sequence by 1 and write the new file.

Example of file names and sequence #

part1_part2_part3_datesequence.dat
or
part1_part2_part3_part4_datesequence.dat

the sequence is a 6 digit right justified 0 filled number attached to the date - 20080501000001.dat, but may be the 4th, 5th, 6th or 7th token of the filename.

I have a script that creates the new files, but I am having trouble with how to efficiently extract the sequence number in order to increment it by 1 for a given file pattern and date and then write the new file.

Any help would be appreciated and I am trying to stay with shell or sed or awk as I do not have access to perl.

thanks!

Mike

sandiego_coder

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cs_destroy

cs_destroy(3)							      cs/cs.h							     cs_destroy(3)

NAME

       cs_destroy  - clean up and dealloc a parse tree

SYNOPSIS

       #include <cs/cs.h>

       void cs_destroy (CSPARSE **parse);

ARGUMENTS

       parse - a pointer to a parse structure.

DESCRIPTION

       cs_destroy  will  clean	up all the memory associated with a CSPARSE structure, including strings passed to cs_parse_string.  This does not
       clean up any memory allocated by your own CSOUTFUNC or the HDF data structure passed to cs_init.  It is safe  to  call  this  with  a  NULL
       pointer, and it will leave parse NULL as well (ie, it can be called more than once on the same var)

RETURN VALUE

       parse - will be NULL

SEE ALSO

       cs_dump(3),  cs_destroy(3),  cs_render(3),  cs_register_esc_strfunc(3),	cs_arg_parsev(3),  cs_register_fileload(3),  cs_init(3), cs_regis-
       ter_strfunc(3), cs_arg_parse(3), cs_parse_string(3), cs_parse_file(3), =(3), cs_register_function

ClearSilver							   12 July 2007 						     cs_destroy(3)

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