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" LogiPat: Boolean logical pattern matcher " Author: Charles E. Campbell " Date: Apr 04, 2016 " Version: 4 " Purpose: to do Boolean-logic based regular expression pattern matching " Copyright: Copyright (C) 1999-2011 Charles E. Campbell {{{1 " Permission is hereby granted to use and distribute this code, " with or without modifications, provided that this copyright " notice is copied with it. Like most anything else that's free, " LogiPat.vim is provided *as is* and comes with no warranty " of any kind, either expressed or implied. By using this " plugin, you agree that in no event will the copyright " holder be liable for any damages resulting from the use " of this software. " " Usage: {{{1 " :LogiPat ... " " Boolean logic supported: " () grouping operators " ! not the following pattern " | logical or " & logical and " "..pattern.." " Example: {{{1 " :LogiPat !("january"|"february") " would match all strings not containing the strings january " or february " GetLatestVimScripts: 1290 1 :AutoInstall: LogiPat.vim " " Behold, you will conceive in your womb, and bring forth a son, {{{1 " and will call his name Jesus. He will be great, and will be " called the Son of the Most High. The Lord God will give him the " throne of his father, David, and he will reign over the house of " Jacob forever. There will be no end to his kingdom. (Luke 1:31-33 WEB) " --------------------------------------------------------------------- " Load Once: {{{1 if &cp || exists("loaded_logiPat") finish endif let g:loaded_logiPat = "v4" let s:keepcpo = &cpo set cpo&vim "DechoRemOn " --------------------------------------------------------------------- " Public Interface: {{{1 com! -nargs=* LogiPat call LogiPat(<q-args>,1) sil! com -nargs=* LP call LogiPat(<q-args>,1) sil! com -nargs=* LPR call LogiPat(<q-args>,1,"r") com! -nargs=+ LPE echomsg LogiPat(<q-args>) com! -nargs=+ LogiPatFlags let s:LogiPatFlags="<args>" sil! com -nargs=+ LPF let s:LogiPatFlags="<args>" " ===================================================================== " Functions: {{{1 " --------------------------------------------------------------------- " LogiPat: this function interprets the boolean-logic pattern {{{2 fun! LogiPat(pat,...) " call Dfunc("LogiPat(pat<".a:pat.">)") " LogiPat(pat,dosearch) if a:0 > 0 let dosearch= a:1 else let dosearch= 0 endif if a:0 >= 3 let s:LogiPatFlags= a:3 endif let s:npatstack = 0 let s:nopstack = 0 let s:preclvl = 0 let expr = a:pat " Lexer/Parser while expr != "" " call Decho("expr<".expr.">") if expr =~ '^"' " push a Pattern; accept "" as a single " in the pattern let expr = substitute(expr,'^\s*"','','') let pat = substitute(expr,'^$\%([^"]\|\"\"$\{-}\)"$[^"].*$\|$$','\1','') let pat = substitute(pat,'""','"','g') let expr = substitute(expr,'^$\%([^"]\|\"\"$\{-}\)"$[^"].*$\|$$','\2','') let expr = substitute(expr,'^\s*','','') " call Decho("pat<".pat."> expr<".expr.">") call s:LP_PatPush('.*'.pat.'.*') elseif expr =~ '^[!()|&]' " push an operator let op = strpart(expr,0,1) let expr = strpart(expr,strlen(op)) " allow for those who can't resist doubling their and/or operators if op =~ '[|&]' && expr[0] == op let expr = strpart(expr,strlen(op)) endif call s:LP_OpPush(op) elseif expr =~ '^\s' " skip whitespace let expr= strpart(expr,1) else echoerr "operator<".strpart(expr,0,1)."> not supported (yet)" let expr= strpart(expr,1) endif endwhile " Final Execution call s:LP_OpPush('Z') let result= s:LP_PatPop(1) " call Decho("result=".result) " sanity checks and cleanup if s:npatstack > 0 echoerr s:npatstack." patterns left on stack!" let s:npatstack= 0 endif if s:nopstack > 0 echoerr s:nopstack." operators left on stack!" let s:nopstack= 0 endif " perform the indicated search if dosearch if exists("s:LogiPatFlags") && s:LogiPatFlags != "" " call Decho("search(result<".result."> LogiPatFlags<".s:LogiPatFlags.">)") call search(result,s:LogiPatFlags) else " call Decho("search(result<".result.">)") call search(result) endif let @/= result endif " call Dret("LogiPat ".result) return result endfun " --------------------------------------------------------------------- " s:String: Vim6.4 doesn't have string() {{{2 func! s:String(str) return "'".escape(a:str, '"')."'" endfunc " --------------------------------------------------------------------- " LP_PatPush: {{{2 fun! s:LP_PatPush(pat) " call Dfunc("LP_PatPush(pat<".a:pat.">)") let s:npatstack = s:npatstack + 1 let s:patstack_{s:npatstack} = a:pat " call s:StackLook("patpush") "Decho " call Dret("LP_PatPush : npatstack=".s:npatstack) endfun " --------------------------------------------------------------------- " LP_PatPop: pop a number/variable from LogiPat's pattern stack {{{2 fun! s:LP_PatPop(lookup) " call Dfunc("LP_PatPop(lookup=".a:lookup.")") if s:npatstack > 0 let ret = s:patstack_{s:npatstack} let s:npatstack = s:npatstack - 1 else let ret= "---error---" echoerr "(LogiPat) invalid expression" endif " call s:StackLook("patpop") "Decho " call Dret("LP_PatPop ".ret) return ret endfun " --------------------------------------------------------------------- " LP_OpPush: {{{2 fun! s:LP_OpPush(op) " call Dfunc("LP_OpPush(op<".a:op.">)") " determine new operator's precedence level if a:op == '(' let s:preclvl= s:preclvl + 10 let preclvl = s:preclvl elseif a:op == ')' let s:preclvl= s:preclvl - 10 if s:preclvl < 0 let s:preclvl= 0 echoerr "too many )s" endif let preclvl= s:preclvl elseif a:op =~ '|' let preclvl= s:preclvl + 2 elseif a:op =~ '&' let preclvl= s:preclvl + 4 elseif a:op == '!' let preclvl= s:preclvl + 6 elseif a:op == 'Z' let preclvl= -1 else echoerr "expr<".expr."> not supported (yet)" let preclvl= s:preclvl endif " call Decho("new operator<".a:op."> preclvl=".preclvl) " execute higher-precdence operators " call Decho("execute higher-precedence operators") call s:LP_Execute(preclvl) " push new operator onto operator-stack " call Decho("push new operator<".a:op."> onto stack with preclvl=".preclvl." at nopstack=".(s:nopstack+1)) if a:op =~ '!' let s:nopstack = s:nopstack + 1 let s:opprec_{s:nopstack} = preclvl let s:opstack_{s:nopstack} = a:op elseif a:op =~ '|' let s:nopstack = s:nopstack + 1 let s:opprec_{s:nopstack} = preclvl let s:opstack_{s:nopstack} = a:op elseif a:op == '&' let s:nopstack = s:nopstack + 1 let s:opprec_{s:nopstack} = preclvl let s:opstack_{s:nopstack} = a:op endif " call s:StackLook("oppush") "Decho " call Dret("LP_OpPush : s:preclvl=".s:preclvl) endfun " --------------------------------------------------------------------- " LP_Execute: execute operators from opstack using pattern stack {{{2 fun! s:LP_Execute(preclvl) " call Dfunc("LP_Execute(preclvl=".a:preclvl.") npatstack=".s:npatstack." nopstack=".s:nopstack) " execute all higher precedence operators while s:nopstack > 0 && a:preclvl < s:opprec_{s:nopstack} let op= s:opstack_{s:nopstack} " call Decho("op<".op."> nop=".s:nopstack." [preclvl=".a:preclvl."] < [opprec_".s:nopstack."=".s:opprec_{s:nopstack}."]") let s:nopstack = s:nopstack - 1 if op == '!' let n1= s:LP_PatPop(1) call s:LP_PatPush(s:LP_Not(n1)) elseif op == '|' let n1= s:LP_PatPop(1) let n2= s:LP_PatPop(1) call s:LP_PatPush(s:LP_Or(n2,n1)) elseif op =~ '&' let n1= s:LP_PatPop(1) let n2= s:LP_PatPop(1) call s:LP_PatPush(s:LP_And(n2,n1)) endif " call s:StackLook("execute") "Decho endwhile " call Dret("LP_Execute") endfun " --------------------------------------------------------------------- " LP_Not: writes a logical-not for a pattern {{{2 fun! s:LP_Not(pat) " call Dfunc("LP_Not(pat<".a:pat.">)") if a:pat =~ '^\.\*' && a:pat =~ '\.\*$' let pat= substitute(a:pat,'^\.\*$.*$\.\*$','\1','') let ret= '^\%(\%('.pat.'\)\@!.\)*$' else let ret= '^\%(\%('.a:pat.'\)\@!.\)*$' endif " call Dret("LP_Not ".ret) return ret endfun " --------------------------------------------------------------------- " LP_Or: writes a logical-or branch using two patterns {{{2 fun! s:LP_Or(pat1,pat2) " call Dfunc("LP_Or(pat1<".a:pat1."> pat2<".a:pat2.">)") let ret= '\%('.a:pat1.'\|'.a:pat2.'\)' " call Dret("LP_Or ".ret) return ret endfun " --------------------------------------------------------------------- " LP_And: writes a logical-and concat using two patterns {{{2 fun! s:LP_And(pat1,pat2) " call Dfunc("LP_And(pat1<".a:pat1."> pat2<".a:pat2.">)") let ret= '\%('.a:pat1.'\&'.a:pat2.'\)' " call Dret("LP_And ".ret) return ret endfun " --------------------------------------------------------------------- " StackLook: {{{2 fun! s:StackLook(description) " call Dfunc("StackLook(description<".a:description.">)") let iop = 1 let ifp = 1 " call Decho("Pattern Operator") " print both pattern and operator while ifp <= s:npatstack && iop <= s:nopstack let fp = s:patstack_{ifp} let op = s:opstack_{iop}." (P".s:opprec_{s:nopstack}.')' let fplen= strlen(fp) if fplen < 30 let fp= fp.strpart(" ",1,30-fplen) endif " call Decho(fp.op) let ifp = ifp + 1 let iop = iop + 1 endwhile " print just pattern while ifp <= s:npatstack let fp = s:patstack_{ifp} " call Decho(fp) let ifp = ifp + 1 endwhile " print just operator while iop <= s:nopstack let op = s:opstack_{iop}." (P".s:opprec_{s:nopstack}.')' " call Decho(" ".op) let iop = iop + 1 endwhile " call Dret("StackLook") endfun " --------------------------------------------------------------------- " Cleanup And Modeline: {{{1 let &cpo= s:keepcpo unlet s:keepcpo " vim: ts=4 fdm=marker