magix-composer
Version:
compile html, style and javascript files into javascript
62 lines • 1.81 kB
JavaScript
/*
md5转换，最初使用的md5，后期修改成sha512，但md5这个名称未换
*/
let configs = require('./util-config');
let vkeys = '_abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
let vkeysWithNumber = vkeys + '0123456789';
let variable = (count, withNumber) => { //压缩变量
let result = '',
temp,
keys = withNumber ? vkeysWithNumber : vkeys;
do {
temp = count % keys.length;
result = keys.charAt(temp) + result;
count = (count - temp) / keys.length;
}
while (count);
return result;
};
let counter = Object.create(null);
let cache = Object.create(null);
let md5 = (text, configKey, prefix, withNumber, reserved) => {
text += '';
if (configKey == 'revisableString') {
if (configs.revisableStringMap.hasOwnProperty(text)) {
return configs.revisableStringMap[text];
}
let spliter = text.includes(':') ? ':' : '#';
let temp = text.split(spliter);
if (temp.length > 1) {
configKey = temp[0];
prefix = '';
} else {
reserved = configs.revisableStringMapReserved;
}
}
if (!counter[configKey]) {
counter[configKey] = 0;
}
if (!cache[configKey]) {
cache[configKey] = Object.create(null);
}
let rstr = cache[configKey][text];
if (rstr) {
return rstr;
}
do {
let c = counter[configKey];
rstr = variable(c, withNumber);
counter[configKey] = ++c;
if (prefix) {
rstr = prefix + rstr;
}
} while (reserved && reserved[rstr]);
cache[configKey][text] = rstr;
return rstr;
};
md5.byNum = variable;
md5.clear = () => {
counter = Object.create(null);
cache = Object.create(null);
};
module.exports = md5;