need help for matche and insert

xiuli

I am trying to match two patterns in a file and insert a line. If the patterns matche then insert a line after the second matching pattern line.

for example,
I have the following content in a file:

//This is my source file

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pin(name1) { 

clock; 

capacitance; 

direction: input; 

//this is where i want to insert a line 

min_pulse; 

} 

pin(name2) { 

clock; 

capacitance; 

direction: input; 

//this is where i want to insert a line 

max_pulse; 

}

I have to match for two patterns "pin" and "direction:input" and then insert a line after the second pattern match.

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#!/usr/bin/perl -w 

open(FILE, " <sdv.lib") ¦ ¦die "can not open this file\n"; 

open(OUTFILE,">out_sdv.lib") ¦ ¦die "can not create outfie"; 

$i=0; 

$search="pin(.+){"; 

$second="direction(.+)input(.+)"; 

$add="max_tran: 500;\n"; 

@source= <FILE>; 

while(@source){ 

if($source[$i]=~/$search/){ 

$j=$i; 

for($i;$i <=$j+3;$i++){ 

if($source[$i]=~/$second/){ 

print OUTFILE $source[$i]." ".$add; 

} 

else{ 

print OUTFILE $source[$i]; 

} 

} 

} 
 
else{ 

print OUTFILE $_; 

} 

$i++; 

} 

close(FILE); 

close(OUTFILE);

The above code did not work. Could you tell me what's wrong this program?

KevinADC

Your code, while it could be written better, appears as though it should work or is close to working. I think if you put a little more effort into debugging you will get it working. If not, let me know and I will try and help.

nithinpes

The while(@source) {} loop will result in an infinite loop unless you are removing elements of @source inside the while loop using pop() or shift().
In your case, since you have used variable index throughout the script, you can replace while(@source) with:

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for($i=0; $i<=$#source; $i++) ## remove additional $i++; at the end of your loop

Other than this, the rest of the script seems fine and should work.

need help for matche and insert

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