From 4184c3c1d2b2888dacaf6ca386f3286c6d49b349 Mon Sep 17 00:00:00 2001
From: ShikiSuen <shikisuen@outlook.com>
Date: Sun, 18 Feb 2024 23:57:57 +0800
Subject: [PATCH] DataCompiler // Post-dump SQLite database.

---
 DataCompiler/dataCompiler.swift | 22 ++++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

diff --git a/DataCompiler/dataCompiler.swift b/DataCompiler/dataCompiler.swift
index 3b6db154..bfa63b7b 100644
--- a/DataCompiler/dataCompiler.swift
+++ b/DataCompiler/dataCompiler.swift
@@ -194,7 +194,7 @@ func prepareDatabase() -> Bool {
     PRIMARY KEY (theChar)
   ) WITHOUT ROWID;
   """
-  guard sqlite3_open(urlSQLite, &ptrSQL) == SQLITE_OK else { return false }
+  guard sqlite3_open(":memory:", &ptrSQL) == SQLITE_OK else { return false }
   guard sqlite3_exec(ptrSQL, "PRAGMA synchronous = OFF;", nil, nil, nil) == SQLITE_OK else { return false }
   guard sqlite3_exec(ptrSQL, "PRAGMA journal_mode = OFF;", nil, nil, nil) == SQLITE_OK else { return false }
   guard sqlMakeTableMACV.runAsSQLExec(dbPointer: &ptrSQL) else { return false }
@@ -231,6 +231,20 @@ func prepareDatabase() -> Bool {
   return true
 }
 
+// MARK: - Dump SQLite3 Memory Database to File.
+
+@discardableResult func dumpSQLDB() -> Bool {
+  var ptrSQLTarget: OpaquePointer?
+  defer { sqlite3_close_v2(ptrSQLTarget) }
+  guard sqlite3_open(urlSQLite, &ptrSQLTarget) == SQLITE_OK else { return false }
+  let ptrBackupObj = sqlite3_backup_init(ptrSQLTarget, "main", ptrSQL, "main")
+  if ptrBackupObj != nil {
+    sqlite3_backup_step(ptrBackupObj, -1)
+    sqlite3_backup_finish(ptrBackupObj)
+  }
+  return sqlite3_errcode(ptrSQLTarget) == SQLITE_OK
+}
+
 // MARK: - 載入詞組檔案且輸出陣列
 
 func rawDictForPhrases(isCHS: Bool) -> [Unigram] {
@@ -1114,8 +1128,12 @@ func main() {
     assert(committed)
     let compressed = "VACUUM;".runAsSQLExec(dbPointer: &ptrSQL)
     assert(compressed)
+    if !dumpSQLDB() {
+      NSLog("// SQLite 辭典傾印失敗。")
+    } else {
+      NSLog("// 全部 SQLite 辭典檔案建置完畢。")
+    }
     sqlite3_close_v2(ptrSQL)
-    NSLog("// 全部 SQLite 辭典檔案建置完畢。")
   }
 }