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source/libs/tdb/src/db/tdbBtree.c

@@ -25,8 +25,13 @@ struct SBTree {
 
 struct SBtCursor {
   SBTree *pBt;
+  int8_t  iPage;
 };
 
+typedef struct SBPage {
+  /* TODO */
+} SBPage;
+
 int tdbBtreeOpen(SPgno root, SBTree **ppBt) {
   *ppBt = NULL;
   /* TODO */
@@ -38,6 +43,25 @@ int tdbBtreeClose(SBTree *pBt) {
   return 0;
 }
 
+int tdbBtreeCursor(SBTree *pBt, SBtCursor *pCur) {
+  pCur->pBt = pBt;
+  pCur->iPage = -1;
+  return 0;
+}
+
+int tdbBtreeCursorMoveTo(SBtCursor *pCur) {
+  /* TODO */
+  return 0;
+}
+
+static int tdbBtreeCursorMoveToRoot(SBtCursor *pCur) {
+  SPFile *pFile = pCur->pBt->pFile;
+
+  tdbPFileGet(pFile, pCur->pBt->root);
+  /* TODO */
+  return 0;
+}
+
 #if 0
 struct SBtCursor {
   SBTree *pBtree;

source/libs/tdb/src/db/tdbPFile.c

@@ -70,6 +70,19 @@ int tdbPFileClose(SPFile *pFile) {
   return 0;
 }
 
+SPgHdr *tdbPFileGet(SPFile *pFile, SPgno pgno) {
+  SPCache *pCache;
+  SPgid    pgid;
+  SPgHdr * pPage;
+
+  pCache = pFile->pCache;
+
+  pPage = tdbPCacheFetch(pCache, &pgid, true);
+  tdbPCacheFetchFinish(pCache, pPage);
+
+  return pPage;
+}
+
 int tdbPFileBegin(SPFile *pFile) {
   // TODO
   return 0;

source/libs/tdb/src/inc/tdbPFile.h

@@ -24,7 +24,7 @@ typedef struct SPFile SPFile;
 
 int     tdbPFileOpen(SPCache *pCache, const char *fileName, SPFile **ppFile);
 int     tdbPFileClose(SPFile *pFile);
-void *tdbPFileGet(SPFile *pFile, SPgno pgno);
+SPgHdr *tdbPFileGet(SPFile *pFile, SPgno pgno);
 int     tdbPFileBegin(SPFile *pFile);
 int     tdbPFileCommit(SPFile *pFile);
 int     tdbPFileRollback(SPFile *pFile);