AWK switch case not matching *.html

Question

I don't understand what I was doing wrong.

I tried the following (what I thought the simplest and most direct), but it would not match the filename string passed by outfile (Text/content_001_One.html):

switch( outfile ){
    case *.html :
        doctype="application/xhtml+xml" ;
        break;
    default : ;
} ;

I also tried (still without success):

switch( outfile ){
    case /*.html/ :
    case /*.html$/ :
    case /*[.]html/ :
        doctype="application/xhtml+xml" ;
        break;
    default : ;
} ;

I was forced to resort to this

n=split( outfile, pathName, "." ) ;
printf("\t\t Suffix of outfile => %s ...\n", pathName[n] ) | "cat 1>&2" ;
switch( pathName[n] ){
    case "html" :
        doctype="application/xhtml+xml" ;
        break;
    default : ;
} ;

I would prefer to use the outfile value directly instead of the workaround.

Can someone please show me what the correct form would be?

Answer 1

For a string that ends in .html one viable regex is /\.html$/, eg:

switch( outfile ){
    case /\.html$/ :
        doctype="application/xhtml+xml" ;
        break;
    default : ;
} ;