59 lines
1.1 KiB
JavaScript
59 lines
1.1 KiB
JavaScript
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//boyer-moore?
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module.exports = function bm(buf,search,offset){
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var m = 0, j = 0
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var table = []
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var ret = -1;
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for(var i=offset||0;i<buf.length;++i){
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console.log('i',i)
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table[i] = [[i,0]]
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if(buf[i] === search[0]) {
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for(j = search.length-1;j>0;--j){
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table[i].push([i+j,j])
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console.log('j',j)
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if(buf[i+j] !== search[j]) {
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//i += j
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j = -1
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break
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}
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}
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if(j === 0) {
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ret = i
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break
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}
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}
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}
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console.log(table)
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renderTable(table,buf,search)
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return ret
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}
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var chalk = require('chalk')
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function renderTable(table,buf,search){
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var s = ''
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console.log('-----')
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console.log('search:',search)
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console.log('-----')
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console.log(buf+'')
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table.forEach(function(a){
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if(!a) return;// console.log('')
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a.forEach(function(v){
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if(!v) return;
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var pad = ''
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while(pad.length < v[0]){
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pad += ' '
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}
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if(search[v[1]] === buf[v[0]]) console.log(pad+chalk.green(search[v[1]]))
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else console.log(pad+chalk.red(search[v[1]]))
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})
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})
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console.log('-----')
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}
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