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DataCompiler // Correctly handle statement pointers.

This commit is contained in:
ShikiSuen 2023-11-30 20:09:35 +08:00
parent bbe1b409c5
commit a4e301beef
1 changed files with 34 additions and 14 deletions
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48
DataCompiler/dataCompiler.swift
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@ -28,6 +28,26 @@ fileprivate extension String {
}
}
// MARK: - Safe APIs for using SQLite Statements.
func performStatement(_ handler: (inout OpaquePointer?) -> Bool) -> Bool {
var ptrStmt: OpaquePointer?
defer {
sqlite3_finalize(ptrStmt)
ptrStmt = nil
}
return handler(&ptrStmt)
}
func performStatementSansResult(_ handler: (inout OpaquePointer?) -> Void) {
var ptrStmt: OpaquePointer?
defer {
sqlite3_finalize(ptrStmt)
ptrStmt = nil
}
handler(&ptrStmt)
}
// MARK: - String as SQL Command
fileprivate extension String {
@ -35,9 +55,11 @@ fileprivate extension String {
ptrDB != nil && sqlite3_exec(ptrDB, self, nil, nil, nil) == SQLITE_OK
}
@discardableResult func runAsSQLPreparedStep(dbPointer ptrDB: inout OpaquePointer?, stmtPtr ptrStmt: inout OpaquePointer?) -> Bool {
@discardableResult func runAsSQLPreparedStep(dbPointer ptrDB: inout OpaquePointer?) -> Bool {
guard ptrDB != nil else { return false }
return sqlite3_prepare_v2(ptrDB, self, -1, &ptrStmt, nil) == SQLITE_OK && sqlite3_step(ptrStmt) == SQLITE_DONE
return performStatement { ptrStmt in
sqlite3_prepare_v2(ptrDB, self, -1, &ptrStmt, nil) == SQLITE_OK && sqlite3_step(ptrStmt) == SQLITE_DONE
}
}
}
@ -209,13 +231,13 @@ func prepareDatabase() -> Bool {
return true
}
@discardableResult func writeMainMapToSQL(_ theMap: [String: [String]], column columnName: String, ptrStmt: inout OpaquePointer?) -> Bool {
@discardableResult func writeMainMapToSQL(_ theMap: [String: [String]], column columnName: String) -> Bool {
for (encryptedKey, arrValues) in theMap {
// SQL 語言需要對西文 ASCII 半形單引號做回退處理、變成「''」。
let safeKey = encryptedKey.replacingOccurrences(of: "'", with: "''")
let valueText = arrValues.joined(separator: "\t").replacingOccurrences(of: "'", with: "''")
let sqlStmt = "INSERT INTO DATA_MAIN (theKey, \(columnName)) VALUES ('\(safeKey)', '\(valueText)') ON CONFLICT(theKey) DO UPDATE SET \(columnName)='\(valueText)';"
guard sqlStmt.runAsSQLPreparedStep(dbPointer: &ptrSQL, stmtPtr: &ptrStmt) else {
guard sqlStmt.runAsSQLPreparedStep(dbPointer: &ptrSQL) else {
print("Failed: " + sqlStmt)
return false
}
@ -223,13 +245,13 @@ func prepareDatabase() -> Bool {
return true
}
@discardableResult func writeRevLookupMapToSQL(_ theMap: [String: [String]], ptrStmt: inout OpaquePointer?) -> Bool {
@discardableResult func writeRevLookupMapToSQL(_ theMap: [String: [String]]) -> Bool {
for (encryptedKey, arrValues) in theMap {
// SQL 語言需要對西文 ASCII 半形單引號做回退處理、變成「''」。
let safeKey = encryptedKey.replacingOccurrences(of: "'", with: "''")
let valueText = arrValues.joined(separator: "\t").replacingOccurrences(of: "'", with: "''")
let sqlStmt = "INSERT INTO DATA_REV (theChar, theReadings) VALUES ('\(safeKey)', '\(valueText)') ON CONFLICT(theChar) DO UPDATE SET theReadings='\(valueText)';"
guard sqlStmt.runAsSQLPreparedStep(dbPointer: &ptrSQL, stmtPtr: &ptrStmt) else {
guard sqlStmt.runAsSQLPreparedStep(dbPointer: &ptrSQL) else {
print("Failed: " + sqlStmt)
return false
}
@ -1085,14 +1107,12 @@ func main() {
}
NSLog("// 反查資料整合完畢。")
NSLog("// 準備建置 SQL 資料庫。")
var ptrStmt: OpaquePointer?
writeMainMapToSQL(rangeMapJSONCHS, column: "theDataCHS", ptrStmt: &ptrStmt)
writeMainMapToSQL(rangeMapJSONCHT, column: "theDataCHT", ptrStmt: &ptrStmt)
writeMainMapToSQL(rangeMapSymbols, column: "theDataSYMB", ptrStmt: &ptrStmt)
writeMainMapToSQL(rangeMapZhuyinwen, column: "theDataCHEW", ptrStmt: &ptrStmt)
writeMainMapToSQL(rangeMapCNS, column: "theDataCNS", ptrStmt: &ptrStmt)
writeRevLookupMapToSQL(rangeMapReverseLookup, ptrStmt: &ptrStmt)
sqlite3_finalize(ptrStmt)
writeMainMapToSQL(rangeMapJSONCHS, column: "theDataCHS")
writeMainMapToSQL(rangeMapJSONCHT, column: "theDataCHT")
writeMainMapToSQL(rangeMapSymbols, column: "theDataSYMB")
writeMainMapToSQL(rangeMapZhuyinwen, column: "theDataCHEW")
writeMainMapToSQL(rangeMapCNS, column: "theDataCNS")
writeRevLookupMapToSQL(rangeMapReverseLookup)
let committed = "commit;".runAsSQLExec(dbPointer: &ptrSQL)
assert(committed)
let compressed = "VACUUM;".runAsSQLExec(dbPointer: &ptrSQL)