Lets say i have the following script and have to look for .model and print the next two word before (. The following is the contents of the file that I need to read.
.model Q2N2222 NPN(Is=14.34f Xti=3 Eg=1.11 Vaf=74.03 Bf=255.9 Ne=1.307
Ise=14.34f Ikf=.2847 Xtb=1.5 Br=6.092 Nc=2 Isc=0 Ikr=0 Rc=1
+ Cjc=7.306p Mjc=.3416 Vjc=.75 Fc=.5 Cje=22.01p Mje=.377 Vje=.75
+ Tr=46.91n Tf=411.1p Itf=.6 Vtf=1.7 Xtf=3 Rb=10)
* National pid=19 case=TO18
* 88-09-07 bam creation
*$
.model Q2N3904 NPN(Is=6.734f Xti=3 Eg=1.11 Vaf=74.03 Bf=416.4 Ne=1.259
.model Q2N3906 PNP(Is=1.41f Xti=3 Eg=1.11 Vaf=18.7 Bf=180.7 Ne=1.5 Ise=0
Here is the code i have written so far. But i couldnt get any. Need the help
proc find_lib_parts {f_name} {
set value [string first ".lib" $f_name]
if {$value != -1} {
#open the file
set fid [ open $f_name "r"]
#read the fid and split it in to lines
set infos [split [read $fid] "\n"]
close $fid
set res {}
append res "MODEL FOUND:\n"
if {[llength $line] > 2 && [lindex $line 0] eq {model}} {
#lappend res [lindex $data 2] \n
lappend res [split $line "("]\n
}
if {[llength $line] > 2 && [lindex $line 0] eq {MODEL}} {
#lappend res [lindex $data 2] \n
lappend res [split $line "("]\n
}
}
return $res
In this case, a regular expression is by far the simplest way of doing such a search. Assuming the words are always on the same line, it's easy:
proc find_lib_parts {f_name} {
set fid [open $f_name]
set infos [split [read $fid] "\n"]
close $fid
set found {}
foreach line $infos {
if {[regexp {\.model\s+(\w+\s+\w+)\(} $line -> twoWords]} {
lappend found $twoWords
}
}
return $found
}
For your input data sample, that'll produce a result like this:
{Q2N2222 NPN} {Q2N3904 NPN} {Q2N3906 PNP}
If there's nothing to find, you'll get an empty list. (I assume you pass filenames correctly anyway, so I omitted that check.)
The regular expression, which should virtually always be enclosed in {braces} in Tcl, is this:
\.model\s+(\w+\s+\w+)\(
It's relatively simple. The pieces of it are:
\.model — literal “.model” (with an escape of the . because it is a RE metacharacter)
\s+ — some whitespace
( — start a capturing group (the bit we put into the twoWords variable)
\w+ — a “word”, one or more alphanumeric (or underscore) characters
\s+ — some whitespace
\w+ — a “word”, one or more alphanumeric (or underscore) characters
) — end of the capturing group
\( — literal “(”, escaped
The regexp command matches this, returning whether or not it matched (effectively boolean without the -all option, which we're not using here), and assigning the various groups to the variables named afterwards, -> for the whole matched string (yes, that's a legal variable name; I like to use it for regexp variables that dump info I don't want) and twoWords for the interesting substring.
Related
I have file with the below lines (file.list):
insert_buffer [get_ports { port }] BUFF1 -new_net net -new_cell cell
I'm reading the file with the below script (read.tcl):
#! /usr/local/bin/tclsh
foreach arg $argv {
set file [open $arg r]
set data [ read $file ]
foreach line [ split $data "\n" ] {
puts $line
set name [lindex $line [expr [lsearch -all $line "-new_cell"]+1]]
puts $name
}
close $file
}
while running the above script (read.tcl file.list) I get error since I have "[" in file.list and script think its a beginning of TCL command.
list element in braces followed by "]" instead of space
while executing
"lsearch -all $line "-new_cell""
("foreach" body line 5)
invoked from within
"foreach line [ split $data "\n" ] {
How can I read the file correctly and overcome the "[" symbol?
How can I read the file correctly and overcome the "[" symbol?
I don't really understand why you are doing what you are doing (processing one Tcl script by another), but you have to make sure that each line is a valid Tcl list before submitting it to lsearch.
lsearch -all [split $line] "-new_cell"
Only split will turn an arbitrary string (containing characters special to Tcl) into a valid Tcl list.
This is one of the few times in Tcl that you need to worry about what type of data you have. $line holds a string. Don't use list commands on strings because there's no guarantee that an arbitrary string is a well-formed list.
Do this:
set fields [split $line]
# don't use "-all" here: you want a single index, not a list of indices.
set idx [lsearch -exact $fields "-new_cell"]
if {$idx == -1} {
do something here if there's no -new_cell in the line
} else {
set name [lindex $fields $idx+1]
}
In order to apply a list operation on the variable, it has to be a valid list. The variable $line is not a valid list.
It is better to use regexp rather than lsearch
regexp -- {-new_cell\s+(\S+)} $x match value
puts $value
Output :
cell
I want to convert a column of a file in to list using Tcl Script. I have a file names "input.dat" with the data in two columns as follows:
7 0
9 9
0 2
2 1
3 4
And I want to convert the first column into a list and I wrote the Tcl Script as follows:
set input [open "input.dat" r]
set data [read $input]
set values [list]
foreach line [split $data \n] {
lappend values [lindex [split $line " "] 0]
}
puts "$values"
close $input
The result shows as: 7 9 0 2 3 {} {}
Now, my question is what is these two extra "{}" and what is the error in my script because of that it's producing two extra "{}" and How can I solve this problem?
Can anybody help me?
Those empty braces indicate empty strings. The file you used most probably had a couple empty lines at the end.
You could avoid this situation by checking a line before lappending the first column to the list of values:
foreach line [split $data \n] {
# if the line is not equal to blank, then lappend it
if {$line ne ""} {
lappend values [lindex [split $line " "] 0]
}
}
You can also remove those empty strings after getting the result list, but it would mean you'll be having two loops. Still can be useful if you cannot help it.
For example, using lsearch to get all the values that are not blank (probably simplest in this situation):
set values [lsearch -all -inline -not $values ""]
Or lmap to achieve the same (a bit more complex IMO but gives more flexibility when you have more complex situations):
set values [lmap n $values {if {$n != ""} {set n}}]
The first {} is caused by the blank line after 3 4.
The second {} is caused by a blank line which indicates end of file.
If the last blank line is removed from the file, then there will be only one {}.
If the loop is then coded in the following way, then there will be no {}.
foreach line [split $data \n] {
if { $line eq "" } { break }
lappend values [lindex [split $line " "] 0]
}
#jerry has a better solution
Unless intermittent empty strings carry some meaning important to your program's task, you may also use a transformation from a Tcl list (with empty-string elements) to a string that prunes empty-string elements (at the ends, and in-between):
concat {*}[split $data "\n"]
First time poster and new to TCL so please pardon my knowledge.
I've found a few examples on stackoverflow and with that help created a script.
I need to modify few lines of a file, I've tried the following (see code). I can seem to add the line of interest but it does not write it in the correct location e.g. if I want to replace line 3 it adds line after line 3
and moreover deletes subsequent lines if there is more than one line operation.
Lastly could some one kindly suggest the best way to identify the line of interest with name rather than line number. Name is always in the form Filter.HpOrd_n =
where n is 0...k
Data in info.dat
AA
BB
Filter.HpOrd_1 = 2
Filter.HpOrd_2 = 2
Filter.HpOrd_3 = 0.1
Filter.HpOrd_4 = 0.2
CC
DD
EE
FF
Code:
set fd [open "info.dat" r+]
set i 0
while { [gets $fd line] != -1 } {
set line [split $line "\n"]
incr i
if {$i == 3} {
set nLine [lreplace $line 0 0 Filter.LoPass]
puts $fd [join $nLine "\n"]
}
if {$i == 6} {
set nLine [lreplace $line 0 0 Filter.Butterworth]
puts $fd [join $nLine "\n"]
}
}
close $fd
With plain Tcl:
# the input and output file handles
set fin [open info.dat r]
set fout [file tempfile fname]
# process the file
while {[gets $fin line] != -1} {
puts $fout [string map {
"Filter.HpOrd_1" "Filter.LoPass"
"Filter.HpOrd_4" "Filter.Butterworth"
} $line]
}
close $fin
close $fout
# backup the original and overwrite it
file link -hard info.dat.bak info.dat
file rename -force -- $fname info.dat
TCL is just a meta language and set fd [open "info.dat" r+] is related to general file descriptor handling. If you open a file descriptor "r+" you can read and write to that file descriptor, but one file descriptor always points to one point in a file.
With "r+" your file descriptor initially points to the start of the file. Then you gets $fd line a line from the file, so $fd points to the start of the second line afterwards. Now you puts $fs [join $nline "\n"] blindly overwriting from the start of the second line and so on.
Generally you cannot replace lines in one file, but you will write a second file and move that after you closed both files. You can overwrite with seek, but you overwrite from a point in the file. So what you put should always have the same size, of you have read before.
Plain files (in basically all programming languages) are byte/character oriented rather than line oriented. This means 1) that you need to use a seek operation to get back to the beginning of the line you want to overwrite, and 2) unless the new line is exactly the same length as the old one, you will experience stub lines around it.
You have other problems as well. set line [split $line "\n"] doesn't do anything: you've just read line from gets, so it's guaranteed not to have any newlines in it. [join $nLine "\n"] doesn't do what you probably think it does: it will replace any sequences of whitespace in $line with single newlines, but it will not place any newline at the end of the string.
Unless your files are insanely large, I recommend something like this:
Replace by line number
proc lineReplace args {
set lines [split [lindex $args end] \n]
foreach {n line} [lrange $args 0 end-1] {
set index [incr n -1]
if {$index > 0} {
lset lines $index $line
}
}
join $lines \n
}
package require fileutil
fileutil::updateInPlace info.dat {
lineReplace
3 Filter.LoPass
6 Filter.Butterworth
}
In the "front end" you only specify the command to use and thereafter pairs of line number / new line text.
In the "back end" (the lineReplace command) the parameter args will contain those number / line pairs and at the end, as a single item, the complete contents of the file. The file contents are then split into a list of lines, and for every number / line pair you replace one of the items in that list. Finally, the list of lines are joined back into a string with newlines between each line. This string is returned by lineReplace to fileutil::updateInPlace, which replaces the old contents in the file with the returned string.
Replace by name
proc lineReplaceByName args {
set lines [split [lindex $args end] \n]
foreach {name line} [lrange $args 0 end-1] {
set index [lsearch $lines $name*]
if {$index > 0} {
lset lines $index $line
}
}
join $lines \n
}
fileutil::updateInPlace info.dat {
lineReplaceByName
Filter.HpOrd_1 Filter.LoPass
Filter.HpOrd_4 Filter.Butterworth
}
In this case the "back end" calculates the line number by searching for the given name at the beginning of each line. If the name isn't found, the replacement operation is skipped. Otherwise it's the same as before.
Replacing just the name
If you don't want to replace the complete line, but just the name part of it, some changes are necessary. If you are 100% sure that 1) the name never has any whitespace in it, and 2) there is always whitespace between the name and the =, you can just replace lset lines $index $line with lset lines $index 0 $line. If you want to play it safer, you can replace the line with
lset lines $index [regsub {.+(?=\s*=\s*)} [lindex $lines $index] $line]
which uses a regular expression to find the character region that precedes the = character (optionally with whitespace around it) and then replaces that with the text you provided.
The fileutil package is a part of the Tcllib companion library to Tcl.
Documentation: fileutil package, foreach, if, incr, join, lindex, lrange, lsearch, lset, package, proc, regsub, seek, set, split
Good afternoon,
I am attempting to write a tcl script which given the input file
input hreadyin;
input wire htrans;
input wire [7:0] haddr;
output logic [31:0] hrdata;
output hreadyout;
will produce
hreadyin(hreadyin),
htrans(htrans),
haddr(haddr[7:0]),
hrdata(hrdata[31:0]),
hready(hreadyout)
In other words, the format is:
<input/output> <wire/logic optional> <width, optional> <paramName>;
with the number of whitespaces unrestricted between each of them.
I have no problem reading from the input file and was able to put each line in a $line element. Now I have been trying things like:
set param0 [split $line "input"]
set param1 [lindex $param0 1]
But since not all lines have "input" line in them i am unable to get the elements i want (the name and the width if it exists).
Is there another command in tcl capable for doing this kind of parsing?
The regexp command is useful to find words separated by arbitrary whitespace:
while {[gets $fh line] != -1} {
# get all whitespace-separated words in the line, ignoring the semi-colon
set i [string first ";" $line]
set fields [regexp -inline -all {\S+} [string range $line 0 $i-1]]
switch -exact -- [llength $fields] {
2 - 3 {
set name [lindex $fields end]
puts [format "%s(%s)," $name $name]
}
4 {
lassign $fields - - width name
puts [format "%s(%s%s)," $name $name $width]
}
}
}
I think you should look at something like
# Compress all multiple spaces to single spaces
set compressedLine [resgub " +" $line " "]
set items [split [string range $compressedLine 0 end-1] $compressedLine " "]
switch [llength $items] {
2 {
# Handle case where neither wire/logic nor width is specificed
set inputOutput [lindex $items 0]
set paramName [lindex $items 1]
.
.
.
}
4 {
# Handle case where both wire/logic and width are specified
set inputOutput [lindex $items 0]
set wireLogic [lindex $items 1]
set width [lindex $items 2]
set paramName [lindex $items 3]
.
.
.
}
default {
# Don't know how to handle other cases - add them in if you know
puts stderr "Can't handle $line
}
}
I hope it's not legal to have exactly one of wire/logic and width specified - you'd need to work hard to determine which is which.
(Note the [string range...] fiddle to discard the semicolon at the end of the line)
Or if you can write up a regex that catches the right data, you can do this with this:
set data [open "file.txt" r]
set output [open "output.txt" w]
while {[gets $data line] != -1} {
regexp -- {(\[\d+:\d+\])?\s*(\w+);} $line - width params
puts $output "$params\($params$width\),"
}
close $data
close $output
This one will also print the comma you have inserted in your expected output, but will insert it in the last line as well so you get:
hreadyin(hreadyin),
htrans(htrans),
haddr(haddr[7:0]),
hrdata(hrdata[31:0]),
hready(hreadyout),
If you don't want it and the file is not too large (apparently the limit is 2147483672 bytes for a list, which I'm gonna use), you could use a group like this:
set data [open "file.txt" r]
set output [open "output.txt" w]
set listing "" #Empty list
while {[gets $data line] != -1} {
regexp -- {(\[\d+:\d+\])?\s*(\w+);} $line - width params
lappend listing "$params\($params$width\)" #Appending to list instead
}
puts $output [join $listing ",\n"] #Join all in a single go
close $data
close $output
I want to check if my expect_out(buffer) contains % as the first character on any line
if it is found then print the wole expect out contants.
regexp's -lineanchor option makes ^ match the beginning of lines instead of just the beginning of the string.
if {[regexp -lineanchor -- {^%} $buffer]} {
puts -nonewline $buffer
}
I'm not that familiar with expect. But if it's just a normal tcl string like:
%line1
^line2
&line3
Then you can do it like this:
set buffer "%line1\n^line2\n&line3"
foreach line [split $buffer "\n"] {
if {[string index $line 0] == "%"} {
puts $buffer; # prints the entire buffer, puts $line prints this line only
break
}
}