Remove code for support of older SQLite versions

Only SQLite version 3.32.0 and higher will be supported. Therefore code relevant only to older versions could be removed.

Additionally, fixed an issue with attached databases implicitly using the encryption key of the main database.

Author: utelle

src/codecext.c

@@ -158,6 +158,8 @@ static int
 sqlite3mcCodecAttach(sqlite3* db, int nDb, const char* zPath, const void* zKey, int nKey)
 {
   /* Attach a key to a database. */
+  const char* zDbName = db->aDb[nDb].zDbSName;
+  const char* dbFileName = sqlite3_db_filename(db, zDbName);
   Codec* codec = (Codec*) sqlite3_malloc(sizeof(Codec));
   int rc = (codec != NULL) ? sqlite3mcCodecInit(codec) : SQLITE_NOMEM;
   if (rc != SQLITE_OK)
@@ -188,7 +190,7 @@ sqlite3mcCodecAttach(sqlite3* db, int nDb, const char* zPath, const void* zKey,
           sqlite3mcSetBtree(codec, db->aDb[nDb].pBt);
           mcAdjustBtree(db->aDb[nDb].pBt, pageSize, reserved, sqlite3mcGetLegacyWriteCipher(codec));
           sqlite3mcCodecSizeChange(codec, pageSize, reserved);
-          sqlite3mcSetCodec(db, zPath, codec);
+          sqlite3mcSetCodec(db, dbFileName, codec);
         }
         else
         {
@@ -210,12 +212,6 @@ sqlite3mcCodecAttach(sqlite3* db, int nDb, const char* zPath, const void* zKey,
   }
   else
   {
-#if (SQLITE_VERSION_NUMBER >= 3015000)
-    const char* zDbName = db->aDb[nDb].zDbSName;
-#else
-    const char* zDbName = db->aDb[nDb].zName;
-#endif
-    const char* dbFileName = sqlite3_db_filename(db, zDbName);
     if (dbFileName != NULL)
     {
       /* Check whether key salt is provided in URI */
@@ -245,9 +241,6 @@ sqlite3mcCodecAttach(sqlite3* db, int nDb, const char* zPath, const void* zKey,
       int reserved = sqlite3mcGetReservedWriteCipher(codec);
       mcAdjustBtree(db->aDb[nDb].pBt, pageSize, reserved, sqlite3mcGetLegacyWriteCipher(codec));
       sqlite3mcCodecSizeChange(codec, pageSize, reserved);
-#if 0
-      const char* dbFileName = sqlite3_db_filename(db, zDbName);
-#endif
       sqlite3mcSetCodec(db, dbFileName, codec);
     }
     else
@@ -395,11 +388,7 @@ sqlite3_rekey_v2(sqlite3* db, const char* zDbName, const void* zKey, int nKey)
           char* err = NULL;
           sqlite3mcSetReadReserved(codec, nReserved);
           sqlite3mcSetWriteReserved(codec, nReservedWriteCipher);
-#if (SQLITE_VERSION_NUMBER >= 3027000)
           rc = sqlite3mcRunVacuumForRekey(&err, db, dbIndex, NULL, nReservedWriteCipher);
-#else
-          rc = sqlite3mcRunVacuumForRekey(&err, db, dbIndex, nReservedWriteCipher);
-#endif
           goto leave_rekey;
         }
       }
@@ -426,11 +415,7 @@ sqlite3_rekey_v2(sqlite3* db, const char* zDbName, const void* zKey, int nKey)
       char* err = NULL;
       sqlite3mcSetReadReserved(codec, nReserved);
       sqlite3mcSetWriteReserved(codec, 0);
-#if (SQLITE_VERSION_NUMBER >= 3027000)
       rc = sqlite3mcRunVacuumForRekey(&err, db, dbIndex, NULL, 0);
-#else
-      rc = sqlite3mcRunVacuumForRekey(&err, db, dbIndex, 0);
-#endif
       goto leave_rekey;
     }
   }
@@ -451,11 +436,7 @@ sqlite3_rekey_v2(sqlite3* db, const char* zDbName, const void* zKey, int nKey)
           char* err = NULL;
           sqlite3mcSetReadReserved(codec, nReserved);
           sqlite3mcSetWriteReserved(codec, nReservedWriteCipher);
-#if (SQLITE_VERSION_NUMBER >= 3027000)
           rc = sqlite3mcRunVacuumForRekey(&err, db, dbIndex, NULL, nReservedWriteCipher);
-#else
-          rc = sqlite3mcRunVacuumForRekey(&err, db, dbIndex, nReservedWriteCipher);
-#endif
           goto leave_rekey;
         }
       }
@@ -474,56 +455,27 @@ sqlite3_rekey_v2(sqlite3* db, const char* zDbName, const void* zKey, int nKey)
   }
 
   /* Start transaction */
-#if (SQLITE_VERSION_NUMBER >= 3025000)
   rc = sqlite3BtreeBeginTrans(pBt, 1, 0);
-#else
-  rc = sqlite3BtreeBeginTrans(pBt, 1);
-#endif
   if (!rc)
   {
     int pageSize = sqlite3BtreeGetPageSize(pBt);
     Pgno nSkip = WX_PAGER_MJ_PGNO(pageSize);
-#if (SQLITE_VERSION_NUMBER >= 3003014)
     DbPage *pPage;
-#else
-    void *pPage;
-#endif
     Pgno n;
     /* Rewrite all pages using the new encryption key (if specified) */
-#if (SQLITE_VERSION_NUMBER >= 3007001)
     Pgno nPage;
     int nPageCount = -1;
     sqlite3PagerPagecount(pPager, &nPageCount);
     nPage = nPageCount;
-#elif (SQLITE_VERSION_NUMBER >= 3006000)
-    int nPageCount = -1;
-    int rc = sqlite3PagerPagecount(pPager, &nPageCount);
-    Pgno nPage = (Pgno) nPageCount;
-#elif (SQLITE_VERSION_NUMBER >= 3003014)
-    Pgno nPage = sqlite3PagerPagecount(pPager);
-#else
-    Pgno nPage = sqlite3pager_pagecount(pPager);
-#endif
 
     for (n = 1; rc == SQLITE_OK && n <= nPage; n++)
     {
       if (n == nSkip) continue;
-#if (SQLITE_VERSION_NUMBER >= 3010000)
       rc = sqlite3PagerGet(pPager, n, &pPage, 0);
-#elif (SQLITE_VERSION_NUMBER >= 3003014)
-      rc = sqlite3PagerGet(pPager, n, &pPage);
-#else
-      rc = sqlite3pager_get(pPager, n, &pPage);
-#endif
       if (!rc)
       {
-#if (SQLITE_VERSION_NUMBER >= 3003014)
         rc = sqlite3PagerWrite(pPage);
         sqlite3PagerUnref(pPage);
-#else
-        rc = sqlite3pager_write(pPage);
-        sqlite3pager_unref(pPage);
-#endif
       }
     }
   }
@@ -536,15 +488,7 @@ sqlite3_rekey_v2(sqlite3* db, const char* zDbName, const void* zKey, int nKey)
   if (rc != SQLITE_OK)
   {
     /* Rollback in case of error */
-#if (SQLITE_VERSION_NUMBER >= 3008007)
-    /* Unfortunately this change was introduced in version 3.8.7.2 which cannot be detected using the SQLITE_VERSION_NUMBER */
-    /* That is, compilation will fail for version 3.8.7 or 3.8.7.1  ==> Please change manually ... or upgrade to 3.8.7.2 or higher */
     sqlite3BtreeRollback(pBt, SQLITE_OK, 0);
-#elif (SQLITE_VERSION_NUMBER >= 3007011)
-    sqlite3BtreeRollback(pbt, SQLITE_OK);
-#else
-    sqlite3BtreeRollback(pbt);
-#endif
   }
 
 leave_rekey:

src/sqlite3mc.h

@@ -12,7 +12,7 @@
 
 #include "sqlite3.h"
 
-#ifdef SQLITE_USER_AUHENTICATION
+#ifdef SQLITE_USER_AUTHENTICATION
 #include "sqlite3userauth.h"
 #endif
 
@@ -95,24 +95,18 @@
 /*
 ** Define Windows specific SQLite API functions (not defined in sqlite3.h)
 */
-#if SQLITE_VERSION_NUMBER >= 3007014
 #if SQLITE_OS_WIN == 1
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-#if SQLITE_VERSION_NUMBER >= 3024000
 SQLITE_API int sqlite3_win32_set_directory(unsigned long type, void* zValue);
-#else
-SQLITE_API int sqlite3_win32_set_directory(DWORD type, LPCWSTR zValue);
-#endif
 
 #ifdef __cplusplus
 }
 #endif
 
-#endif
 #endif
 
 #ifdef __cplusplus

src/userauth.c

@@ -214,11 +214,7 @@ int sqlite3_user_authenticate(
   db->auth.nAuthPW = nPW;
   rc = sqlite3UserAuthCheckLogin(db, "main", &authLevel);
   db->auth.authLevel = authLevel;
-#if (SQLITE_VERSION_NUMBER >= 3025000)
   sqlite3ExpirePreparedStatements(db, 0);
-#else
-  sqlite3ExpirePreparedStatements(db);
-#endif
   if( rc ){
     return rc;           /* OOM error, I/O error, etc. */
   }