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Full Discussion: shell problem
Top Forums Shell Programming and Scripting shell problem Post 302627937 by agama on Sunday 22nd of April 2012 12:50:30 PM
Old 04-22-2012
Seems more efficient to let awk do the work rather than invoking two extra processes for each function encountered:

Code:
BEGIN { level=0; }
{
if (index($0,"{")<1) {
   if ((level==0) && (index($0,"(")>0) && (index($0,")")>0))
   {
       split( $0, a, "(" );
       n = split( a[1], b, " " );
       print b[n];
   }
   if (index($0,"{")>0) level++;
   if (index($0,"}")>0) level--;
   }
}



This also handles the case where the programmer used the more traditional style that places the function type on the previous line:

Code:
float
dist(int *a,int *b,int n){



---------- Post updated at 12:50 ---------- Previous update was at 11:58 ----------

Looking at your code a bit more closely, I'm not sure that it's going to do what you expected. In particular, this seems wrong:

Code:
if (index($0,"{")<1) {


This will execute the contents of the block only if the record does not have an opening (left) curly brace, but from the code it seems that you want the block to execute when there is an opening curly brace. The code also assumes that the programmer hasn't dropped the opening brace to the next line.


You could extend the awk a bit, and do everything in one pass across your C source with one awk programme. Something like this:

Code:
awk '
    /\(.*\)/ && level == 0 {        # capture each function name
        split( $0, a, "(" );
        n = split( a[1], b, " " );
        list[b[n]] = 1;
    }

    /{/ {
        if( ++level == 1 )          # don't need to process further if level 0
            next;
     }

    /}/ { level--; }

    level > 0 {                     # search for function use only if not a 0th level
        for( f in list )
            if( match( $0, f"[(]" ) )
            {
                loc[f] = loc[f] NR " ";
                num[f]++;
            }
    }

    END {                           # print each function, lines where its called and number of uses
        for( f in list )
            if( length( loc[f] ) )
                printf( "%s\n%s\n%d\n\n", f, loc[f], num[f] );
    }
'



This also handles the case where the opening curly brace is dropped to the next line, the type is on the preceding line, and allows for prototype statements.
 

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LEARN ABOUT X11R4

tc-tcindex

Traffic control index filter(8) 				       Linux					   Traffic control index filter(8)

NAME

       tcindex - traffic control index filter

SYNOPSIS

       tc filter ... tcindex [ hash SIZE ] [ mask MASK ] [ shift SHIFT ] [ pass_on | fall_through ] [ classid CLASSID ] [ action ACTION_SPEC ]

DESCRIPTION

       This  filter allows to match packets based on their tcindex field value, i.e. the combination of the DSCP and ECN fields as present in IPv4
       and IPv6 headers.

OPTIONS

       action ACTION_SPEC
	      Apply an action from the generic actions framework on matching packets.

       classid CLASSID
	      Push matching packets into the class identified by CLASSID.

       hash SIZE
	      Hash table size in entries to use. Defaults to 64.

       mask MASK
	      An optional bitmask to binary AND to the packet's tcindex field before use.

       shift SHIFT
	      The number of bits to right-shift a packet's tcindex value before use. If a mask has been set, masking is done before shifting.

       pass_on
	      If this flag is set, failure to find a class for the resulting ID will make the filter fail and lead to the next filter  being  con-
	      sulted.

       fall_through
	      This  is	the  opposite  of  pass_on  and the default. The filter will classify the packet even if there is no class present for the
	      resulting class ID.

SEE ALSO

       tc(8)

iproute2							    21 Oct 2015 				   Traffic control index filter(8)
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