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:-) (CVS 34)

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FossilOrigin-Name: 52338f4ab5990fefc61f615cd65c3a724b365199
This commit is contained in:
drh
2000-06-02 01:17:37 +00:00
parent 5494880a71
commit 58b9576b7a
13 changed files with 257 additions and 162 deletions
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84
src/main.c
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@@ -26,7 +26,7 @@
** other files are for internal use by SQLite and should not be
** accessed by users of the library.
**
** $Id: main.c,v 1.2 2000/05/31 22:58:39 drh Exp $
** $Id: main.c,v 1.3 2000/06/02 01:17:37 drh Exp $
*/
#include "sqliteInt.h"
@@ -51,14 +51,17 @@ static int sqliteOpenCb(void *pDb, int argc, char **argv, char **azColName){
}
/*
** Open a new SQLite database. Construct an "sqlite" structure to define
** the state of this database and return a pointer to that structure.
** Attempt to read the database schema and initialize internal
** data structures. Return one of the SQLITE_ error codes to
** indicate success or failure.
*/
sqlite *sqlite_open(const char *zFilename, int mode, char **pzErrMsg){
sqlite *db;
static int sqliteInit(sqlite *db, char **pzErrMsg){
Vdbe *vdbe;
Table *pTab;
char *azArg[2];
int rc;
/*
** The master database table has a structure like this
*/
static char master_schema[] =
"CREATE TABLE " MASTER_NAME " (\n"
" type text,\n"
@@ -116,7 +119,44 @@ sqlite *sqlite_open(const char *zFilename, int mode, char **pzErrMsg){
{ OP_Halt, 0, 0, 0}, /* 16 */
};
/* Allocate space to hold the main database structure */
/* Create a virtual machine to run the initialization program. Run
** the program. The delete the virtual machine.
*/
vdbe = sqliteVdbeCreate(db->pBe);
sqliteVdbeAddOpList(vdbe, sizeof(initProg)/sizeof(initProg[0]), initProg);
rc = sqliteVdbeExec(vdbe, sqliteOpenCb, db, pzErrMsg);
sqliteVdbeDelete(vdbe);
if( rc==SQLITE_OK ){
Table *pTab;
char *azArg[2];
azArg[0] = master_schema;
azArg[1] = 0;
sqliteOpenCb(db, 1, azArg, 0);
pTab = sqliteFindTable(db, MASTER_NAME);
if( pTab ){
pTab->readOnly = 1;
}
db->flags |= SQLITE_Initialized;
}else{
sqliteStrRealloc(pzErrMsg);
}
return rc;
}
/*
** Open a new SQLite database. Construct an "sqlite" structure to define
** the state of this database and return a pointer to that structure.
**
** An attempt is made to initialize the in-memory data structures that
** hold the database schema. But if this fails (because the schema file
** is locked) then that step is deferred until the first call to
** sqlite_exec().
*/
sqlite *sqlite_open(const char *zFilename, int mode, char **pzErrMsg){
sqlite *db;
int rc;
/* Allocate the sqlite data structure */
db = sqliteMalloc( sizeof(sqlite) );
if( pzErrMsg ) *pzErrMsg = 0;
if( db==0 ){
@@ -132,20 +172,12 @@ sqlite *sqlite_open(const char *zFilename, int mode, char **pzErrMsg){
return 0;
}
/* Create a virtual machine to run the initialization program. Run
** the program. The delete the virtual machine.
*/
azArg[0] = master_schema;
azArg[1] = 0;
sqliteOpenCb(db, 1, azArg, 0);
pTab = sqliteFindTable(db, MASTER_NAME);
if( pTab ){
pTab->readOnly = 1;
/* Attempt to read the schema */
rc = sqliteInit(db, pzErrMsg);
if( rc!=SQLITE_OK && rc!=SQLITE_BUSY ){
sqlite_close(db);
return 0;
}
vdbe = sqliteVdbeCreate(db->pBe);
sqliteVdbeAddOpList(vdbe, sizeof(initProg)/sizeof(initProg[0]), initProg);
sqliteVdbeExec(vdbe, sqliteOpenCb, db, pzErrMsg);
sqliteVdbeDelete(vdbe);
return db;
}
@@ -208,14 +240,18 @@ int sqlite_exec(
char **pzErrMsg /* Write error messages here */
){
Parse sParse;
int nErr;
int rc;
if( pzErrMsg ) *pzErrMsg = 0;
if( (db->flags & SQLITE_Initialized)==0 ){
int rc = sqliteInit(db, pzErrMsg);
if( rc!=SQLITE_OK ) return rc;
}
memset(&sParse, 0, sizeof(sParse));
sParse.db = db;
sParse.xCallback = xCallback;
sParse.pArg = pArg;
nErr = sqliteRunParser(&sParse, zSql, pzErrMsg);
rc = sqliteRunParser(&sParse, zSql, pzErrMsg);
sqliteStrRealloc(pzErrMsg);
return nErr;
return rc;
}