Further work on getting ssdsim to run. This is an incremental checkin to

save my place while jumping off to work on other things.

FossilOrigin-Name: ae2f1627b1672e511be1ff132f2a3fb8f8bb7169

manifest

@@ -1,5 +1,5 @@
-C Merge\sthe\scommand-line\sshell\senhancements\sfrom\strunk.\s\sOther\sedits\stoward\ntrying\sto\sget\sssdsim\sto\srun.
-D 2012-10-25T15:32:29.056
+C Further\swork\son\sgetting\sssdsim\sto\srun.\s\sThis\sis\san\sincremental\scheckin\sto\nsave\smy\splace\swhile\sjumping\soff\sto\swork\son\sother\sthings.
+D 2012-10-25T23:47:27.493
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in 5f4f26109f9d80829122e0e09f9cda008fa065fb
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -221,7 +221,7 @@ F src/test_rtree.c aba603c949766c4193f1068b91c787f57274e0d9
 F src/test_schema.c 8c06ef9ddb240c7a0fcd31bc221a6a2aade58bf0
 F src/test_server.c 2f99eb2837dfa06a4aacf24af24c6affdf66a84f
 F src/test_spellfix.c 76dd8d3111d2f5354c374f71fa23b752bd0b029c
-F src/test_ssdsim.c b4b2ff870e31cdecaf5716c4373a7d9ffc1d3762
+F src/test_ssdsim.c bb4fefe91b9e4d4e3e09488814cc586575590ad4
 F src/test_stat.c d1569c7a4839f13e80187e2c26b2ab4da2d03935
 F src/test_superlock.c 2b97936ca127d13962c3605dbc9a4ef269c424cd
 F src/test_syscall.c a992d8c80ea91fbf21fb2dd570db40e77dd7e6ae
@@ -1022,7 +1022,7 @@ F tool/vdbe-compress.tcl f12c884766bd14277f4fcedcae07078011717381
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh fbc018d67fd7395f440c28f33ef0f94420226381
 F tool/win/sqlite.vsix 67d8a99aceb56384a81b3f30d6c71743146d2cc9
-P 9e6efcf05402cd0b259c9b2ae57e349800650bd7 317c80cba3688a97ade9cde622cc3bd94cf3436a
-R b62d4d680a3785f5f27895a1b1bebbb9
+P 848f87e22fc6bfbbb7dbc7491c8a20cdd53b7420
+R b9ddcfef141182b6a9e7751152774567
 U drh
-Z cbf54f1147196dcbcbab5648835d5435
+Z 1dcb4d96fc4b1f34fb139b8208725f7a

manifest.uuid

@@ -1 +1 @@
-848f87e22fc6bfbbb7dbc7491c8a20cdd53b7420
+ae2f1627b1672e511be1ff132f2a3fb8f8bb7169

src/test_ssdsim.c

@@ -310,7 +310,7 @@ static int ssdsimRead(
   ssdsim_file *p = (ssdsim_file *)pFile;
   ssdsim_inode *pInode = p->pInode;
   int rc = SQLITE_OK;
-  int lpn, ppn, n;
+  int lpn, ppn, n, mx;
   unsigned char *pOut = (unsigned char*)zBuf;
   unsigned char *pContent;
   while( iAmt>0 ){
@@ -322,9 +322,8 @@ static int ssdsimRead(
     lpn = pInode->aiPage[iOfst/g.szPage];
     ppn = ssdsimCoreLpnToPpn(lpn, 0);
     n = iAmt;
-    if( (iOfst+n-1)*g.szPage > lpn ){
-      n = (lpn+1)*g.szPage - iOfst;
-    }
+    mx = g.szPage - iOfst%g.szPage;
+    if( n>mx ) n = mx;
     if( ppn>=0 && ppn<g.nPage && (pContent = g.apPage[ppn])!=0 ){
       memcpy(pOut, &pContent[iOfst%g.szPage], n);
     }else{
@@ -360,8 +359,8 @@ static int ssdsimWrite(
   }else{
     int nOld, nNew;
     int *aiPage;
-    nOld = pInode->len/g.szPage;
-    nNew = (iOfst+iAmt)/g.szPage;
+    nOld = (pInode->len+g.szPage-1)/g.szPage;
+    nNew = (iOfst+iAmt+g.szPage-1)/g.szPage;
     if( nOld<nNew ){
       aiPage = sqlite3_realloc(pInode->aiPage, nNew*sizeof(int));
       if( aiPage==0 ) return SQLITE_NOMEM;
@@ -370,19 +369,17 @@ static int ssdsimWrite(
     }
   }
   while( iAmt>0 ){
-    int n;
+    int n, mx;
     lpn = pInode->aiPage[iOfst/g.szPage];
     if( lpn<0 ){
       lpn = ssdsimCoreLpnAlloc();
       if( lpn<0 ) return SQLITE_FULL;
-      pInode->aiPage[iOfst/g.szPage];
     }
     ppn = ssdsimCoreLpnToPpn(lpn, 1);
     if( ppn<0 ) return SQLITE_NOMEM;
     n = iAmt;
-    if( (iOfst+n-1)*g.szPage > lpn ){
-      n = (lpn+1)*g.szPage - iOfst;
-    }
+    mx = g.szPage - iOfst%g.szPage;
+    if( n>mx ) n = mx;
     pDest = g.apPage[ppn];
     memcpy(pDest, pIn, n);
     iOfst += n;
@@ -752,8 +749,7 @@ static int ssdsimDelete(sqlite3_vfs *pVfs, const char *zPath, int dirSync){
 
   if( ssdsimInit() ) return SQLITE_CANTOPEN;
   pInode = ssdsimFindInode(zPath);
-  if( pInode==0 ) return SQLITE_NOTFOUND;
-  ssdsimDeleteInode(pInode);
+  if( pInode ) ssdsimDeleteInode(pInode);
   return SQLITE_OK;
 }