Minor changes to the sqlite3_exec() implementation in legacy.c

to facility full coverage testing. (CVS 6608)

FossilOrigin-Name: 9e3016c1846174a64833394a00a09335e8446de8

manifest

@@ -1,5 +1,5 @@
-C Bump\sthe\sversion\snumber\sup\sto\s3.6.14.\s(CVS\s6607)
-D 2009-05-05T18:01:58
+C Minor\schanges\sto\sthe\ssqlite3_exec()\simplementation\sin\slegacy.c\nto\sfacility\sfull\scoverage\stesting.\s(CVS\s6608)
+D 2009-05-05T20:02:48
 F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0
 F Makefile.in 583e87706abc3026960ed759aff6371faf84c211
 F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
@@ -123,7 +123,7 @@ F src/hash.h 35b216c13343d0b4f87d9f21969ac55ad72174e1
 F src/hwtime.h 4a1d45f4cae1f402ea19686acf24acf4f0cb53cb
 F src/insert.c 050536ea91c6cf74d87a2386b5da241141943c94
 F src/journal.c e00df0c0da8413ab6e1bb7d7cab5665d4a9000d0
-F src/legacy.c 2ad5b52df322d0f132f66817095e0e79c8942611
+F src/legacy.c 9a56cf126ceee332b56061bf16bd0fb4ff9e26c0
 F src/loadext.c 3f96631089fc4f3871a67f02f2e4fc7ea4d51edc
 F src/main.c a01115fda61971701695fe0d1487e2dfe46a8b1e
 F src/malloc.c 7b3b6423f5b355e5d649b91e16ef252d610bcf19
@@ -728,7 +728,7 @@ F tool/speedtest16.c c8a9c793df96db7e4933f0852abb7a03d48f2e81
 F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
 F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
 F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
-P 866284654c1f163af4164fe8c698d30af32e4eaa
-R 614438be85d436fff9d175dacce984a5
+P f4549904b22ff2340a5830cd67ed001d1c4730a1
+R a3b2a24770fbc08c02f4ac7fe2c7f8a9
 U drh
-Z c91b913e29555819c739c143bde87fdc
+Z cd9beca691f90a6e325ce8cd88b48d70

manifest.uuid

@@ -1 +1 @@
-f4549904b22ff2340a5830cd67ed001d1c4730a1
+9e3016c1846174a64833394a00a09335e8446de8

src/legacy.c

@@ -14,7 +14,7 @@
 ** other files are for internal use by SQLite and should not be
 ** accessed by users of the library.
 **
-** $Id: legacy.c,v 1.32 2009/03/19 18:51:07 danielk1977 Exp $
+** $Id: legacy.c,v 1.33 2009/05/05 20:02:48 drh Exp $
 */
 
 #include "sqliteInt.h"
@@ -36,13 +36,12 @@ int sqlite3_exec(
   void *pArg,                 /* First argument to xCallback() */
   char **pzErrMsg             /* Write error messages here */
 ){
-  int rc = SQLITE_OK;
-  const char *zLeftover;
-  sqlite3_stmt *pStmt = 0;
-  char **azCols = 0;
-
-  int nRetry = 0;
-  int nCallback;
+  int rc = SQLITE_OK;         /* Return code */
+  const char *zLeftover;      /* Tail of unprocessed SQL */
+  sqlite3_stmt *pStmt = 0;    /* The current SQL statement */
+  char **azCols = 0;          /* Names of result columns */
+  int nRetry = 0;             /* Number of retry attempts */
+  int callbackIsInit;         /* True if callback data is initialized */
 
   if( zSql==0 ) zSql = "";
 
@@ -64,7 +63,7 @@ int sqlite3_exec(
       continue;
     }
 
-    nCallback = 0;
+    callbackIsInit = 0;
     nCol = sqlite3_column_count(pStmt);
 
     while( 1 ){
@@ -73,13 +72,12 @@ int sqlite3_exec(
 
       /* Invoke the callback function if required */
       if( xCallback && (SQLITE_ROW==rc || 
-          (SQLITE_DONE==rc && !nCallback && db->flags&SQLITE_NullCallback)) ){
-        if( 0==nCallback ){
+          (SQLITE_DONE==rc && !callbackIsInit
+                           && db->flags&SQLITE_NullCallback)) ){
+        if( !callbackIsInit ){
+          azCols = sqlite3DbMallocZero(db, 2*nCol*sizeof(const char*) + 1);
           if( azCols==0 ){
-            azCols = sqlite3DbMallocZero(db, 2*nCol*sizeof(const char*) + 1);
-            if( azCols==0 ){
-              goto exec_out;
-            }
+            goto exec_out;
           }
           for(i=0; i<nCol; i++){
             azCols[i] = (char *)sqlite3_column_name(pStmt, i);
@@ -87,7 +85,7 @@ int sqlite3_exec(
             ** strings so there is no way for sqlite3_column_name() to fail. */
             assert( azCols[i]!=0 );
           }
-          nCallback++;
+          callbackIsInit = 1;
         }
         if( rc==SQLITE_ROW ){
           azVals = &azCols[nCol];
@@ -129,7 +127,7 @@ exec_out:
   sqlite3DbFree(db, azCols);
 
   rc = sqlite3ApiExit(db, rc);
-  if( rc!=SQLITE_OK && rc==sqlite3_errcode(db) && pzErrMsg ){
+  if( rc!=SQLITE_OK && ALWAYS(rc==sqlite3_errcode(db)) && pzErrMsg ){
     int nErrMsg = 1 + sqlite3Strlen30(sqlite3_errmsg(db));
     *pzErrMsg = sqlite3Malloc(nErrMsg);
     if( *pzErrMsg ){