增加中文日志输出 优化导出日志功能

lib/gbkDecoder.js

@@ -0,0 +1,92 @@
+// Lightweight GBK/GB18030 decoder helper
+// Strategy:
+// 1. Prefer native TextDecoder('gb18030'/'gbk') if available
+// 2. Fallback to a reverse table built from utils/ecUnicodeToGBK.js (if present)
+// 3. Final fallback: byte-by-byte ASCII/replace decoding
+
+function toUint8Array(input) {
+  if (!input) return new Uint8Array(0)
+  if (input instanceof Uint8Array) return input
+  if (input.buffer && input.buffer instanceof ArrayBuffer) return new Uint8Array(input.buffer)
+  return new Uint8Array(input)
+}
+
+let reverseMap = null
+function buildReverseFromTable(table) {
+  try {
+    const rev = Object.create(null)
+    for (let i = 0; i < table.length; i++) {
+      const v = table[i]
+      if (v) rev[String(v).toUpperCase()] = Number(i)
+    }
+    return rev
+  } catch (e) { return null }
+}
+
+function decodeWithTable(u8, table) {
+  if (!table) return null
+  if (!reverseMap) reverseMap = buildReverseFromTable(table)
+  if (!reverseMap) return null
+  let out = ''
+  for (let i = 0; i < u8.length; i++) {
+    const b = u8[i]
+    if (b <= 0x7F) { out += String.fromCharCode(b); continue }
+    const b2 = u8[i + 1]
+    if (typeof b2 !== 'number') { out += '\uFFFD'; continue }
+    const hex = b.toString(16).padStart(2, '0').toUpperCase() + b2.toString(16).padStart(2, '0').toUpperCase()
+    const cp = reverseMap[hex]
+    if (cp != null) {
+      try { out += String.fromCodePoint(cp) } catch (e) { out += '\uFFFD' }
+    } else {
+      out += '\uFFFD'
+    }
+    i += 1
+  }
+  return out
+}
+
+function decode(u8in) {
+  const u8 = toUint8Array(u8in)
+  // 1) Native TextDecoder if environment supports gb18030/gbk
+  try {
+    if (typeof TextDecoder === 'function') {
+      try { return new TextDecoder('gb18030').decode(u8) } catch (e) { /* ignore */ }
+      try { return new TextDecoder('gbk').decode(u8) } catch (e) { /* ignore */ }
+    }
+  } catch (e) { /* ignore */ }
+
+  // 2) Try a local Encoding lib if available (bundles may expose Encoding.convert)
+  try {
+    const enc = (typeof Encoding !== 'undefined') ? Encoding : (typeof window !== 'undefined' ? window.Encoding : null)
+    if (enc && typeof enc.convert === 'function') {
+      try { return enc.convert(u8, { to: 'UNICODE', from: 'GB18030', type: 'string' }) } catch (e) { /* ignore */ }
+      try { return enc.convert(u8, { to: 'UTF8', from: 'GB18030', type: 'string' }) } catch (e) { /* ignore */ }
+    }
+  } catch (e) { /* ignore */ }
+
+  // 3) Try building reverse map from project mapping utils (utils/ecUnicodeToGBK.js)
+  try {
+    const tableMod = require('../utils/ecUnicodeToGBK.js')
+    const table = tableMod && (tableMod.table || tableMod.t || tableMod)
+    if (table) {
+      const s = decodeWithTable(u8, table)
+      if (s && s.length) return s
+    }
+  } catch (e) { /* ignore */ }
+
+  // 4) Final fallback: best-effort ASCII/replace pass
+  try {
+    let out = ''
+    for (let i = 0; i < u8.length; i++) {
+      const b = u8[i]
+      if (b <= 0x7F) out += String.fromCharCode(b)
+      else {
+        const b2 = u8[i + 1]
+        if (typeof b2 === 'number') { out += '\uFFFD'; i += 1 } else { out += '\uFFFD' }
+      }
+    }
+    return out
+  } catch (e) { return '' }
+}
+
+module.exports = { decode }

lib/test_gbk.js

@@ -0,0 +1,11 @@
+// Quick test for gbkDecoder
+const path = require('path')
+const { decode } = require('./gbkDecoder')
+
+const hex = '2D D7 B4 CC AC 3A 32 CC F5 BC FE D7 E9 3A 31 C5 D0 B6 A8 32 2C 32 2C 32 2C 32 2C 32 2C 54 69 6D 65 3A 34 34 30 35 2D 34 34 30 35'
+const bytes = hex.split(/\s+/).map(h => parseInt(h,16))
+const u8 = Uint8Array.from(bytes)
+
+const out = decode(u8)
+console.log('DECODED:', out)
+console.log('EXPECTED:', '- 状态:2 条件组:1 判定-2,2,2,2,2 Time:4405-4405')