Use awk to process tagged text

Source: Internet
Author: User
Use awk to process tagged text. assume that & quot; 123 & lt; em & gt; abc & lt;/em & gt; 456 & lt; em & gt; def & lt; /em & gt; 789 & lt; em & gt; ghi & lt;/em & gt; & quot; the length of a string in such a string is 5, the returned string should be 123ab. to intercept 8 characters, 123 should be returned. & use awk to process tagged text. suppose there is "123 ". Abc456 Def789 Ghi"To intercept the length of a string of 5, the returned string should be 123ab. to intercept the length of 8, 123 should be returned. Abc45. Appendix: 1 AndThe tag cannot be counted within the length. 2. the truncated string must be retained. Label, but if the last tag is not closed, remove its start tag. Code: as follows #! /Bin/basha = '100Abc456Def789Ghi'Echo "test text is '$ A'" read-p "please input a number little than 'echo $ a | awk' {gsub ("|"," ", $0); printf length ($0)}'': "num echo $ a | awk-vnum =" $ num "-vFS ='''{For (I = 1; I <= NF; I ++) {orisum = sum; sum + = length ($ I)-4; if (sum <= num) {strlist = strlist ~ /./? Strlist "" FS "" $ I: $ I} else {sub (" "," ", $ I); strlist = strlist ~ /./? Strlist "" FS "" substr ($ I, 1, num-orisum): substr ($ I, 1, num-orisum); break} print strlist} 'test result: [root @ localhost ~] # Bash 1.sh test text is '123Abc456Def789Ghi'Please input a number little than 18: 212 [root @ localhost ~] # Bash 1.sh test text is '123Abc456Def789Ghi'Please input a number little than 18: 5123ab [root @ localhost ~] # Bash 1.sh test text is '123Abc456Def789Ghi'Please input a number little than 18: 7123Abc4 [root @ localhost ~] # Bash 1.sh test text is '123Abc456Def789Ghi'Please input a number little than 18: 10123Abc456d [root @ localhost ~] # Bash 1.sh test text is '123Abc456Def789Ghi'Please input a number little than 18: 9123Abc456 [root @ localhost ~] # Bash 1.sh test text is '123Abc456Def789Ghi'Please input a number little than 18: 14123Abc456Def78 [root @ localhost ~] # Bash 1.sh test text is '123Abc456Def789Ghi'Please input a number little than 18: 17123Abc456Def789gh [root @ localhost ~] # Bash 1.sh test text is '123Abc456Def789Ghi'Please input a number little than 18: 18123Abc456Def789Ghi[Root @ localhost ~] #
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