[sql] Import reference version of SQLite 3.17..

third_party/sqlite/sqlite-src-3170000/src/test_btree.c

+/*
+** 2007 May 05
+**
+** The author disclaims copyright to this source code.  In place of
+** a legal notice, here is a blessing:
+**
+**    May you do good and not evil.
+**    May you find forgiveness for yourself and forgive others.
+**    May you share freely, never taking more than you give.
+**
+*************************************************************************
+** Code for testing the btree.c module in SQLite.  This code
+** is not included in the SQLite library.  It is used for automated
+** testing of the SQLite library.
+*/
+#include "btreeInt.h"
+#if defined(INCLUDE_SQLITE_TCL_H)
+#  include "sqlite_tcl.h"
+#else
+#  include "tcl.h"
+#endif
+
+/*
+** Usage: sqlite3_shared_cache_report
+**
+** Return a list of file that are shared and the number of
+** references to each file.
+*/
+int SQLITE_TCLAPI sqlite3BtreeSharedCacheReport(
+  void * clientData,
+  Tcl_Interp *interp,
+  int objc,
+  Tcl_Obj *CONST objv[]
+){
+#ifndef SQLITE_OMIT_SHARED_CACHE
+  extern BtShared *sqlite3SharedCacheList;
+  BtShared *pBt;
+  Tcl_Obj *pRet = Tcl_NewObj();
+  for(pBt=GLOBAL(BtShared*,sqlite3SharedCacheList); pBt; pBt=pBt->pNext){
+    const char *zFile = sqlite3PagerFilename(pBt->pPager, 1);
+    Tcl_ListObjAppendElement(interp, pRet, Tcl_NewStringObj(zFile, -1));
+    Tcl_ListObjAppendElement(interp, pRet, Tcl_NewIntObj(pBt->nRef));
+  }
+  Tcl_SetObjResult(interp, pRet);
+#endif
+  return TCL_OK;
+}
+
+/*
+** Print debugging information about all cursors to standard output.
+*/
+void sqlite3BtreeCursorList(Btree *p){
+#ifdef SQLITE_DEBUG
+  BtCursor *pCur;
+  BtShared *pBt = p->pBt;
+  for(pCur=pBt->pCursor; pCur; pCur=pCur->pNext){
+    MemPage *pPage = pCur->apPage[pCur->iPage];
+    char *zMode = (pCur->curFlags & BTCF_WriteFlag) ? "rw" : "ro";
+    sqlite3DebugPrintf("CURSOR %p rooted at %4d(%s) currently at %d.%d%s\n",
+       pCur, pCur->pgnoRoot, zMode,
+       pPage ? pPage->pgno : 0, pCur->aiIdx[pCur->iPage],
+       (pCur->eState==CURSOR_VALID) ? "" : " eof"
+    );
+  }
+#endif
+}