[js] change she.init api

docs/demo/she-demo.js

@@ -3,11 +3,10 @@ function setValue(name, val) { document.getElementsByName(name)[0].value = val }
 function getText(name) { return document.getElementsByName(name)[0].innerText }
 function setText(name, val) { document.getElementsByName(name)[0].innerText = val }
 
-(function() {
-	she.init(function() {
+she.init()
+  .then(() => {
     setText('status', 'ok')
   })
-})()
 
 function bench(label, count, func) {
 	let start = Date.now()

docs/demo/she-demo2.js

@@ -3,56 +3,18 @@ function setValue(name, val) { document.getElementsByName(name)[0].value = val }
 function getText(name) { return document.getElementsByName(name)[0].innerText }
 function setText(name, val) { document.getElementsByName(name)[0].innerText = val }
 
-function Uint8ArrayToHexString(a) {
-	let s = ''
-	for (let i = 0; i < a.length; i++) {
-		s += ('0' + a[i].toString(16)).slice(-2)
-	}
-	return s
-}
-
-function HexStringToUint8Array(s) {
-	let a = new Uint8Array(s.length / 2)
-	for (let i = 0; i < s.length / 2; i++) {
-		a[i] = parseInt(s.slice(i * 2, i * 2 + 2), 16)
-	}
-	return a
-}
-
-function bin2hex(s) {
-	var o = ''
-	for (var i = 0; i < s.length; i++) {
-		n = s.charCodeAt(i).toString(16)
-		o += (n.length < 2 ? '0' + n : n) + ' '
-	}
-	return o
-}
+let sec = null
+let pub = null
 
-function strip(s) {
-	s = s.trim()
-	var begin = 0
-	var end = s.length
-	if (end == 0) {
-		return s
-	}
-	if (s[0] == '"') {
-		begin++
-	}
-	if (begin < end && s[end - 1] == '"') {
-		end--
-	}
-	return s.substr(begin, end - begin)
-}
-
-
-she.init(function() {
+she.init()
+  .then(() => {
     setText('status', 'ok')
     sec = new she.SecretKey()
     sec.setByCSPRNG()
-	setText('sec', sec.toHexStr())
+    sec.dump('sec=')
     pub = sec.getPublicKey()
-	setText('pub', pub.toHexStr())
-})
+    pub.dump('pub=')
+  })
 
 function append() {
 	let v = getValue('append')

docs/demo/she.js

@@ -26,52 +26,49 @@
   const SHE_CIPHERTEXT_G2_SIZE = MCLBN_G2_SIZE * 2
   const SHE_CIPHERTEXT_GT_SIZE = MCLBN_GT_SIZE * 4
 
-  let g_callback = null
-  let g_range = 0
-  let g_tryNum = 0
-
   let capi = {}
   exports.capi = capi
   let mod = exports.mod
 
-  exports.init = function(callback = null, range = 1024, tryNum = 1024) {
+  /*
+    init she
+    @param range [in] table size of DLP ; require 8 * table size
+    @param tryNum [in] how many search ; O(tryNum) time
+    can decrypt (range * tryNum) range value
+  */
+  exports.init = (range = 1024, tryNum = 1024) => {
     console.log('init')
-    g_callback = callback
-    g_range = range
-    g_tryNum = tryNum
-    if (isNodeJs) {
-    } else {
+    if (!isNodeJs) {
       fetch('she_c.wasm')
         .then(response => response.arrayBuffer())
         .then(buffer => new Uint8Array(buffer))
         .then(binary => { Module(mod) })
     }
-  }
-
-  mod.onRuntimeInitialized = function () {
-    const f = function(exportedFuncs) {
+    return new Promise((resolve) => {
+      mod.onRuntimeInitialized = () => {
+        const f = (exportedFuncs) => {
           exportedFuncs.forEach(func => {
             capi[func.exportName] = mod.cwrap(func.name, func.returns, func.args)
           })
           define_extra_functions(mod)
           capi.sheInit()
-      console.log('initializing sheSetRangeForDLP')
-      const r = capi.sheSetRangeForDLP(g_range, g_tryNum)
+          console.log(`initializing sheSetRangeForDLP(range=${range}, tryNum=${tryNum})`)
+          const r = capi.sheSetRangeForDLP(range, tryNum)
           console.log('finished ' + r)
-      if (g_callback) g_callback()
+          resolve()
         }
-    const EXPORTED_JSON = 'exported-she.json'
         if (isNodeJs) {
           const fs = require('fs')
-      const path = require('path')
-      const jsonStr = fs.readFileSync(path.resolve(__dirname, EXPORTED_JSON))
+          const jsonStr = fs.readFileSync('./exported-she.json')
           f(JSON.parse(jsonStr))
         } else {
-      fetch(EXPORTED_JSON)
+          fetch('exported-she.json')
             .then(response => response.json())
             .then(exportedFuncs => f(exportedFuncs))
         }
       }
+    })
+  }
 
   const ptrToStr = function(pos, n) {
     let s = ''