Enforce the run-time sqlite3_limit() length limit on zeroblob(), not just

the compile-time SQLITE_MAX_LENGTH limit. (CVS 6433)

FossilOrigin-Name: a04f9e7959325da18f66a1aa4ead1c50993807cb

manifest

@@ -1,5 +1,5 @@
-C Increase\stest\scoverage\sof\sbitvec.c\sslightly.\s\sFix\sthe\sline\slength\son\sa\ncomment\sin\sbitvec.c.\s(CVS\s6432)
-D 2009-04-01T23:49:04
+C Enforce\sthe\srun-time\ssqlite3_limit()\slength\slimit\son\szeroblob(),\snot\sjust\nthe\scompile-time\sSQLITE_MAX_LENGTH\slimit.\s(CVS\s6433)
+D 2009-04-02T09:07:13
 F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0
 F Makefile.in 583e87706abc3026960ed759aff6371faf84c211
 F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
@@ -113,7 +113,7 @@ F src/date.c e6263ed8950642f593cb1a2cc8a73dd726cc7888
 F src/delete.c eb1066b2f35489fee46ad765d2b66386fc7d8adf
 F src/expr.c 14853cd56107292de6af664a24c6255111a4257d
 F src/fault.c dc88c821842157460750d2d61a8a8b4197d047ff
-F src/func.c 1d6a8689443b15a3845e805a6ad97317b37af3fb
+F src/func.c ac81b4ff36e4e52327097dfcf6a1ba90d9cb63f7
 F src/global.c 448419c44ce0701104c2121b0e06919b44514c0c
 F src/hash.c 5824e6ff7ba78cd34c8d6cd724367713583e5b55
 F src/hash.h 28f38ebb1006a5beedcb013bcdfe31befe7437ae
@@ -714,7 +714,7 @@ F tool/speedtest16.c c8a9c793df96db7e4933f0852abb7a03d48f2e81
 F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
 F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
 F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
-P 05c182a5db9fa96f2d588dd884ce77916b0e60e4
-R 736fecdc86bd337187f07f38299efc83
+P ca3aa3ba7d751be1c2bcd100a203cd9c794a6cef
+R f0264cae48013af5fa04e1ada66682c2
 U drh
-Z 0436fb87186a0b07c69c73ce8e383e5b
+Z 3903933557343f546c355318654d5fcd

manifest.uuid

@@ -1 +1 @@
-ca3aa3ba7d751be1c2bcd100a203cd9c794a6cef
+a04f9e7959325da18f66a1aa4ead1c50993807cb

src/func.c

@@ -16,7 +16,7 @@
 ** sqliteRegisterBuildinFunctions() found at the bottom of the file.
 ** All other code has file scope.
 **
-** $Id: func.c,v 1.226 2009/04/01 16:33:38 drh Exp $
+** $Id: func.c,v 1.227 2009/04/02 09:07:13 drh Exp $
 */
 #include "sqliteInt.h"
 #include <stdlib.h>
@@ -270,12 +270,13 @@ static void roundFunc(sqlite3_context *context, int argc, sqlite3_value **argv){
 */
 static void *contextMalloc(sqlite3_context *context, i64 nByte){
   char *z;
+  assert( nByte>0 );
   if( nByte>sqlite3_context_db_handle(context)->aLimit[SQLITE_LIMIT_LENGTH] ){
     sqlite3_result_error_toobig(context);
     z = 0;
   }else{
     z = sqlite3Malloc((int)nByte);
-    if( !z && nByte>0 ){
+    if( !z ){
       sqlite3_result_error_nomem(context);
     }
   }
@@ -811,7 +812,7 @@ static void zeroblobFunc(
   assert( argc==1 );
   UNUSED_PARAMETER(argc);
   n = sqlite3_value_int64(argv[0]);
-  if( n>SQLITE_MAX_LENGTH ){
+  if( n>sqlite3_context_db_handle(context)->aLimit[SQLITE_LIMIT_LENGTH] ){
     sqlite3_result_error_toobig(context);
   }else{
     sqlite3_result_zeroblob(context, (int)n);