Bash: Regex matching on multiple lines simultaneously and extracting captured content -

-

i have xml file in following format

<starttag name="aaa" >     <innertag name="xxx" value="xxx"/>     <innertag name="xxx" value="xxx"/>     <innertag name="xxx" value="yyy"/> </starttag> <starttag name="bbb" >     <innertag name="xxx" value="xxx"/>     <innertag name="xxx" value="xxx"/>     <innertag name="xxx" value="xxx"/> </starttag> <starttag name="ccc" >     <innertag name="xxx" value="xxx"/>     <innertag name="xxx" value="xxx"/>     <innertag name="xxx" value="yyy"/> </starttag> .. .. ..

i want extract name attributes of starttag of innertag has value yyy.

so in file above, output aaa , ccc. can use regex matching. suppose possible using lookaheads not able create regex patterns multilines. know how use regex single line , tried using same not getting expected outputs. headway on this.

edit: though have put xml example trying know multiline regex matching , trying on file failing. please avoid xml parsing related solutions.

update: per steven suggestion, following worked

pcregrep -m '<starttag name="([^"])*"[^>]*>(\s|<innertag[^>]*>)*<innertag name="[^"]*" value="yyy"\/>(\s|<innertag[^>]*>)*<\/starttag>' file.xml  grep -pzo '<starttag name="([^"])*"[^>]*>(\s|<innertag[^>]*>)*<innertag name="[^"]*" value="yyy"\/>(\s|<innertag[^>]*>)*<\/starttag>' file.xml

an xml parser, 1 supports xpath going far easier , more stable, if must insist on using regex, here's pattern work sample input provided:

<starttag name="([^"])*"[^>]*>(\s|<innertag[^>]*>)*<innertag name="[^"]*" value="yyy"\/>(\s|<innertag[^>]*>)*<\/starttag>

it's not going work variations of well-formed xml documents, long consistently formatted example, should "okay".

by default, regex captures across multiple lines. there option can tell process 1 line @ time, that's not turned on default. real trick . pattern not match new-line characters, if want match character, including new-lines, need use .|\n or negative character class such [^>].


Comments

Post a Comment

Popular posts from this blog

Hatching array of circles in AutoCAD using c# -

-
i beginner in autocad plugins .i have created array of circle using following code. now, have hatch circles in array .how that??how hatch circles @ once? moreover, how can return hatch method , use hatch objects.sorry language.thanks in advance. [assembly: commandclass(typeof(beamsection.class1))] namespace beamsection { public class class1 { //class1 obj = new class1(); [commandmethod("beamatsupport")] public void addlightweightpolyline() { // current document , database document acdoc = application.documentmanager.mdiactivedocument; database accurdb = acdoc.database; promptpointresult ppr = acdoc.editor.getpoint("\nselect starting point "); var ucs = acdoc.editor.currentusercoordinatesystem; point3d startingpt = ppr.value.transformby(ucs); list<double> radius = new list<double>(); radius.add(0.5); ...
Read more

ios - UITEXTFIELD InputView Uipicker not working in swift -

-
hello trying pop uipickerview view programmatically when user clicks on textfield. have tried doesn't doing anything. isn't working. nothing happening when click textfield class userprofiletableviewcontroller: uitableviewcontroller,uitextfielddelegate,uipickerviewdelegate,uipickerviewdatasource { var itempicker: uipickerview! = uipickerview() @iboutlet weak var gendertxtfield: uitextfield! var gender = ["male","female"] override func viewdidload() { super.viewdidload() gendertxtfield.delegate = self itempicker!.delegate = self itempicker!.datasource = self itempicker!.backgroundcolor = uicolor.blackcolor() self.gendertxtfield.inputview = itempicker } func numberofcomponentsinpickerview(pickerview: uipickerview) -> int{ return 1 } // returns # of rows in each component.. func pickerview(pickerview: uipickerview, numberofrowsincomponent component:...
Read more