Updates to the Codec interface to support codecs on attached databases and

to allow rekeying in the middle of a transaction.  These changes are only 
applicable if SQLite is compiled with SQLITE_HAS_CODEC.

FossilOrigin-Name: d5b084e9d8cfe9c0c339aca076d472bb50aa764c

manifest

@@ -1,5 +1,5 @@
-C Add\stests\sfor\srunning\sFTS\s'merge'\sand\s'optimize'\scommands\sin\sshared\scache\smode.
-D 2013-05-29T14:22:19.357
+C Updates\sto\sthe\sCodec\sinterface\sto\ssupport\scodecs\son\sattached\sdatabases\sand\nto\sallow\srekeying\sin\sthe\smiddle\sof\sa\stransaction.\s\sThese\schanges\sare\sonly\s\napplicable\sif\sSQLite\sis\scompiled\swith\sSQLITE_HAS_CODEC.
+D 2013-05-29T17:48:28.829
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in 5e41da95d92656a5004b03d3576e8b226858a28e
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -203,13 +203,13 @@ F src/os.h 4a46270a64e9193af4a0aaa3bc2c66dc07c29b3f
 F src/os_common.h 92815ed65f805560b66166e3583470ff94478f04
 F src/os_unix.c 42c9b8b7c61c9fa3561258f523be5749e52ed0e0
 F src/os_win.c 5f018dbd4cec25c5b47e11432b946a7d2ccee60b
-F src/pager.c 865a09d9ca2eb1c725b192aeac722019c8083e02
+F src/pager.c 79df56da9dd49aceaa4cac207484a9a82cba40ae
 F src/pager.h 5cb78b8e1adfd5451e600be7719f5a99d87ac3b1
 F src/parse.y 9acfcc83ddbf0cf82f0ed9582ccf0ad6c366ff37
 F src/pcache.c f8043b433a57aba85384a531e3937a804432a346
 F src/pcache.h a5e4f5d9f5d592051d91212c5949517971ae6222
 F src/pcache1.c d23d07716de96c7c0c2503ec5051a4384c3fb938
-F src/pragma.c 7528202452b5d6d5ba2538531ac86bfacd8e99ef
+F src/pragma.c 67a611bd4be0754f27ee13eb87932c3b14415862
 F src/prepare.c 743e484233c51109666d402f470523553b41797c
 F src/printf.c bff529ed47657098c55c9910b9c69b1b3b1a1353
 F src/random.c cd4a67b3953b88019f8cd4ccd81394a8ddfaba50
@@ -217,7 +217,7 @@ F src/resolve.c 89f9003e8316ee3a172795459efc2a0274e1d5a8
 F src/rowset.c 64655f1a627c9c212d9ab497899e7424a34222e0
 F src/select.c 22ee971346a736ddefdc4497d07c92f2e9978afc
 F src/shell.c 9a18124ff209ca308d786c99a466e8e270193ff3
-F src/sqlite.h.in 5a5a22a9b192d81a9e5dee00274e3a0484c4afb1
+F src/sqlite.h.in 5b390ca5d94e09e56e7fee6a51ddde4721b89f8e
 F src/sqlite3.rc fea433eb0a59f4c9393c8e6d76a6e2596b1fe0c0
 F src/sqlite3ext.h d936f797812c28b81b26ed18345baf8db28a21a5
 F src/sqliteInt.h 46fb17f604ce941551fe64c342dbeb4dbed3edaa
@@ -1093,7 +1093,7 @@ F tool/vdbe-compress.tcl f12c884766bd14277f4fcedcae07078011717381
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh fbc018d67fd7395f440c28f33ef0f94420226381
 F tool/win/sqlite.vsix 97894c2790eda7b5bce3cc79cb2a8ec2fde9b3ac
-P a64d760d9290b1be78cdda7ae66d4f02c3b3fa53
-R 397c6acb8d54cefb71664fb2c7388de6
-U dan
-Z 3291738ca16dd9e62c0c52ca9c9e0ddb
+P 09e5a7ad85dc592fce868a2d0f8719c6915ccb47
+R 20090ed5100bc7738631061b2f74235f
+U drh
+Z caf68d1d5a539a495dd90cbaf5a54682

manifest.uuid

@@ -1 +1 @@
-09e5a7ad85dc592fce868a2d0f8719c6915ccb47
+d5b084e9d8cfe9c0c339aca076d472bb50aa764c

src/pager.c

@@ -6590,7 +6590,27 @@ void sqlite3PagerSetCodec(
 void *sqlite3PagerGetCodec(Pager *pPager){
   return pPager->pCodec;
 }
-#endif
+
+/*
+** This function is called by the wal module when writing page content
+** into the log file.
+**
+** This function returns a pointer to a buffer containing the encrypted
+** page content. If a malloc fails, this function may return NULL.
+*/
+void *sqlite3PagerCodec(PgHdr *pPg){
+  void *aData = 0;
+  CODEC2(pPg->pPager, pPg->pData, pPg->pgno, 6, return 0, aData);
+  return aData;
+}
+
+/*
+** Return the current pager state
+*/
+int sqlite3PagerState(Pager *pPager){
+  return pPager->eState;
+}
+#endif /* SQLITE_HAS_CODEC */
 
 #ifndef SQLITE_OMIT_AUTOVACUUM
 /*
@@ -7145,19 +7165,4 @@ int sqlite3PagerWalFramesize(Pager *pPager){
 }
 #endif
 
-#ifdef SQLITE_HAS_CODEC
-/*
-** This function is called by the wal module when writing page content
-** into the log file.
-**
-** This function returns a pointer to a buffer containing the encrypted
-** page content. If a malloc fails, this function may return NULL.
-*/
-void *sqlite3PagerCodec(PgHdr *pPg){
-  void *aData = 0;
-  CODEC2(pPg->pPager, pPg->pData, pPg->pgno, 6, return 0, aData);
-  return aData;
-}
-#endif /* SQLITE_HAS_CODEC */
-
 #endif /* SQLITE_OMIT_DISKIO */

src/pragma.c

@@ -1771,10 +1771,10 @@ void sqlite3Pragma(
 
 #ifdef SQLITE_HAS_CODEC
   if( sqlite3StrICmp(zLeft, "key")==0 && zRight ){
-    sqlite3_key(db, zRight, sqlite3Strlen30(zRight));
+    sqlite3_key_v2(db, zDb, zRight, sqlite3Strlen30(zRight));
   }else
   if( sqlite3StrICmp(zLeft, "rekey")==0 && zRight ){
-    sqlite3_rekey(db, zRight, sqlite3Strlen30(zRight));
+    sqlite3_rekey_v2(db, zDb, zRight, sqlite3Strlen30(zRight));
   }else
   if( zRight && (sqlite3StrICmp(zLeft, "hexkey")==0 ||
                  sqlite3StrICmp(zLeft, "hexrekey")==0) ){
@@ -1786,9 +1786,9 @@ void sqlite3Pragma(
       zKey[i/2] = (h2 & 0x0f) | ((h1 & 0xf)<<4);
     }
     if( (zLeft[3] & 0xf)==0xb ){
-      sqlite3_key(db, zKey, i/2);
+      sqlite3_key_v2(db, zDb, zKey, i/2);
     }else{
-      sqlite3_rekey(db, zKey, i/2);
+      sqlite3_rekey_v2(db, zDb, zKey, i/2);
     }
   }else
 #endif

src/sqlite.h.in

@@ -4513,6 +4513,11 @@ int sqlite3_key(
   sqlite3 *db,                   /* Database to be rekeyed */
   const void *pKey, int nKey     /* The key */
 );
+int sqlite3_key_v2(
+  sqlite3 *db,                   /* Database to be rekeyed */
+  const char *zDbName,           /* Name of the database */
+  const void *pKey, int nKey     /* The key */
+);
 
 /*
 ** Change the key on an open database.  If the current database is not
@@ -4526,6 +4531,11 @@ int sqlite3_rekey(
   sqlite3 *db,                   /* Database to be rekeyed */
   const void *pKey, int nKey     /* The new key */
 );
+int sqlite3_rekey_v2(
+  sqlite3 *db,                   /* Database to be rekeyed */
+  const char *zDbName,           /* Name of the database */
+  const void *pKey, int nKey     /* The new key */
+);
 
 /*
 ** Specify the activation key for a SEE database.  Unless