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Full Discussion: Sorting multi-column values from a specific file
Top Forums Shell Programming and Scripting Sorting multi-column values from a specific file Post 302455533 by agama on Wednesday 22nd of September 2010 12:19:03 AM
Old 09-22-2010
Snarfing the date/time makes it a bit more complicated as the value has a space inside of the quotes. So, rewriting things a bit to allow for multiple tokens within quotes consider this brute force parsing example. You can use the date/time value as you need to. This just prints it out when it finds it.

Code:

#!/usr/bin/env ksh

awk -v RS=">" '

        function snarf_vars( )           # capture all name=value pairs on the current line. 
        {
                delete var;
                gsub( " = ", "=" );             # easier to deal without spaces
                for( i = 1; i <= NF; i ++ )
                {
                        if( (x = split( $(i), a, "=" )) == 2 )
                        {
                                $(i) = a[2];
                                for( ; i <= NF; i++ )     # snarf up all tokens in the quotes
                                {
                                        var[a[1]] = var[a[1]] $(i) " ";    # capture next token
                                        if( match( $(i), /"$/ ) )             # this has ending quote 
                                        {
                                                gsub( "\"", "", var[a[1]] );  # one replace of all quotes (does not handle escaped quotes)
                                                break;
                                        }
                                }
                        }
                }
        }

        /DateTime/{
                snarf_vars();
                printf( "%s \n", var["DateTime"] );
        }

        /Percent/ {
                snarf_vars();
                if( var["Price"] )
                        printf( "%c %6.3f %6.3f%%\n", 65+(idx++), var["Price"], var["Percent"]);
        }' <test.xml

The function unsets the var array, so if you want the date/time value later you need to specifically save it or it will be gone. This also makes no attempt to preserve the whitespace that it might find between quotes; for your needs that'll be OK, but if you want to use this in other situations it might not do the job.

Hope this helps.
Last edited by agama; 09-22-2010 at 01:31 AM.. Reason: better, shorter, more simple, snarf function
 

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LEARN ABOUT OSF1

dp

dp(8)							      System Manager's Manual							     dp(8)

NAME

       dp - parse dates RFC 822-style

SYNOPSIS

       /usr/lib/mh/dp [-form file] [-format string] [-help] [-width columns] dates

OPTIONS

       Overrides  the  default	output format of dp.  The output is formatted according to the instructions in the specified file.  This must be a
       format file; see mh-format(4).  Overrides the default output format of dp.  The output is formatted according to the  instructions  in  the
       specified string.  This must be a format string; see mh-format(4).

	      The argument to the -format option must be interpreted as a single token by the shell that invokes dp. Therefore, you should usually
	      place the argument to this option inside double quotes (").  Prints a list of the valid options  to  this  command.   Specifies  the
	      width of the screen in columns.

       The defaults for this command are as follows:

       -width defaults to the width of the terminal

DESCRIPTION

       The dp command parses dates according to the ARPA Internet standard.  It also understands many non-standard formats, such as those produced
       by TOPS-20 sites and some UNIX sites using ctime(3). It is useful for seeing how MH will interpret a date.

       The dp program treats each argument as a single date, and prints the date out in the official RFC 822 format. Hence, it is usually best	to
       enclose each argument in double quotes (") for the shell.

EXAMPLES

       This is the default format string used by dp:

       %<(nodate{text})error: %{text}%|%(pretty{text})%>

       When an error is detected, this prints error: and the date that is in error. Otherwise, it outputs the proper RFC 822 format of the date.

FILES

       User profile.

SEE ALSO

       Commands: ap(8)

       Standard for the Format of ARPA Internet Text Messages (RFC 822)

																	     dp(8)
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