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campo-sirio/sqlite/tclsqlite.c
alex ed9d03ee76 ggiunto sqlite 
git-svn-id: svn://10.65.10.50/trunk@11835 c028cbd2-c16b-5b4b-a496-9718f37d4682
2004-03-11 22:22:24 +00:00

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/*
** 2001 September 15
**
** 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.
**
*************************************************************************
** A TCL Interface to SQLite
**
** $Id: tclsqlite.c,v 1.1.1.1 2004-03-11 22:22:22 alex Exp $
*/
#ifndef NO_TCL /* Omit this whole file if TCL is unavailable */
#include "sqliteInt.h"
#include "tcl.h"
#include <stdlib.h>
#include <string.h>
#include <assert.h>
/*
** If TCL uses UTF-8 and SQLite is configured to use iso8859, then we
** have to do a translation when going between the two. Set the
** UTF_TRANSLATION_NEEDED macro to indicate that we need to do
** this translation.
*/
#if defined(TCL_UTF_MAX) && !defined(SQLITE_UTF8)
# define UTF_TRANSLATION_NEEDED 1
#endif
/*
** New SQL functions can be created as TCL scripts. Each such function
** is described by an instance of the following structure.
*/
typedef struct SqlFunc SqlFunc;
struct SqlFunc {
Tcl_Interp *interp; /* The TCL interpret to execute the function */
char *zScript; /* The script to be run */
SqlFunc *pNext; /* Next function on the list of them all */
};
/*
** There is one instance of this structure for each SQLite database
** that has been opened by the SQLite TCL interface.
*/
typedef struct SqliteDb SqliteDb;
struct SqliteDb {
sqlite *db; /* The "real" database structure */
Tcl_Interp *interp; /* The interpreter used for this database */
char *zBusy; /* The busy callback routine */
char *zCommit; /* The commit hook callback routine */
char *zTrace; /* The trace callback routine */
char *zProgress; /* The progress callback routine */
char *zAuth; /* The authorization callback routine */
SqlFunc *pFunc; /* List of SQL functions */
int rc; /* Return code of most recent sqlite_exec() */
};
/*
** An instance of this structure passes information thru the sqlite
** logic from the original TCL command into the callback routine.
*/
typedef struct CallbackData CallbackData;
struct CallbackData {
Tcl_Interp *interp; /* The TCL interpreter */
char *zArray; /* The array into which data is written */
Tcl_Obj *pCode; /* The code to execute for each row */
int once; /* Set for first callback only */
int tcl_rc; /* Return code from TCL script */
int nColName; /* Number of entries in the azColName[] array */
char **azColName; /* Column names translated to UTF-8 */
};
#ifdef UTF_TRANSLATION_NEEDED
/*
** Called for each row of the result.
**
** This version is used when TCL expects UTF-8 data but the database
** uses the ISO8859 format. A translation must occur from ISO8859 into
** UTF-8.
*/
static int DbEvalCallback(
void *clientData, /* An instance of CallbackData */
int nCol, /* Number of columns in the result */
char ** azCol, /* Data for each column */
char ** azN /* Name for each column */
){
CallbackData *cbData = (CallbackData*)clientData;
int i, rc;
Tcl_DString dCol;
Tcl_DStringInit(&dCol);
if( cbData->azColName==0 ){
assert( cbData->once );
cbData->once = 0;
if( cbData->zArray[0] ){
Tcl_SetVar2(cbData->interp, cbData->zArray, "*", "", 0);
}
cbData->azColName = malloc( nCol*sizeof(char*) );
if( cbData->azColName==0 ){ return 1; }
cbData->nColName = nCol;
for(i=0; i<nCol; i++){
Tcl_ExternalToUtfDString(NULL, azN[i], -1, &dCol);
cbData->azColName[i] = malloc( Tcl_DStringLength(&dCol) + 1 );
if( cbData->azColName[i] ){
strcpy(cbData->azColName[i], Tcl_DStringValue(&dCol));
}else{
return 1;
}
if( cbData->zArray[0] ){
Tcl_SetVar2(cbData->interp, cbData->zArray, "*",
Tcl_DStringValue(&dCol), TCL_LIST_ELEMENT|TCL_APPEND_VALUE);
if( azN[nCol]!=0 ){
Tcl_DString dType;
Tcl_DStringInit(&dType);
Tcl_DStringAppend(&dType, "typeof:", -1);
Tcl_DStringAppend(&dType, Tcl_DStringValue(&dCol), -1);
Tcl_DStringFree(&dCol);
Tcl_ExternalToUtfDString(NULL, azN[i+nCol], -1, &dCol);
Tcl_SetVar2(cbData->interp, cbData->zArray,
Tcl_DStringValue(&dType), Tcl_DStringValue(&dCol),
TCL_LIST_ELEMENT|TCL_APPEND_VALUE);
Tcl_DStringFree(&dType);
}
}
Tcl_DStringFree(&dCol);
}
}
if( azCol!=0 ){
if( cbData->zArray[0] ){
for(i=0; i<nCol; i++){
char *z = azCol[i];
if( z==0 ) z = "";
Tcl_DStringInit(&dCol);
Tcl_ExternalToUtfDString(NULL, z, -1, &dCol);
Tcl_SetVar2(cbData->interp, cbData->zArray, cbData->azColName[i],
Tcl_DStringValue(&dCol), 0);
Tcl_DStringFree(&dCol);
}
}else{
for(i=0; i<nCol; i++){
char *z = azCol[i];
if( z==0 ) z = "";
Tcl_DStringInit(&dCol);
Tcl_ExternalToUtfDString(NULL, z, -1, &dCol);
Tcl_SetVar(cbData->interp, cbData->azColName[i],
Tcl_DStringValue(&dCol), 0);
Tcl_DStringFree(&dCol);
}
}
}
rc = Tcl_EvalObj(cbData->interp, cbData->pCode);
if( rc==TCL_CONTINUE ) rc = TCL_OK;
cbData->tcl_rc = rc;
return rc!=TCL_OK;
}
#endif /* UTF_TRANSLATION_NEEDED */
#ifndef UTF_TRANSLATION_NEEDED
/*
** Called for each row of the result.
**
** This version is used when either of the following is true:
**
** (1) This version of TCL uses UTF-8 and the data in the
** SQLite database is already in the UTF-8 format.
**
** (2) This version of TCL uses ISO8859 and the data in the
** SQLite database is already in the ISO8859 format.
*/
static int DbEvalCallback(
void *clientData, /* An instance of CallbackData */
int nCol, /* Number of columns in the result */
char ** azCol, /* Data for each column */
char ** azN /* Name for each column */
){
CallbackData *cbData = (CallbackData*)clientData;
int i, rc;
if( azCol==0 || (cbData->once && cbData->zArray[0]) ){
Tcl_SetVar2(cbData->interp, cbData->zArray, "*", "", 0);
for(i=0; i<nCol; i++){
Tcl_SetVar2(cbData->interp, cbData->zArray, "*", azN[i],
TCL_LIST_ELEMENT|TCL_APPEND_VALUE);
if( azN[nCol] ){
char *z = sqlite_mprintf("typeof:%s", azN[i]);
Tcl_SetVar2(cbData->interp, cbData->zArray, z, azN[i+nCol],
TCL_LIST_ELEMENT|TCL_APPEND_VALUE);
sqlite_freemem(z);
}
}
cbData->once = 0;
}
if( azCol!=0 ){
if( cbData->zArray[0] ){
for(i=0; i<nCol; i++){
char *z = azCol[i];
if( z==0 ) z = "";
Tcl_SetVar2(cbData->interp, cbData->zArray, azN[i], z, 0);
}
}else{
for(i=0; i<nCol; i++){
char *z = azCol[i];
if( z==0 ) z = "";
Tcl_SetVar(cbData->interp, azN[i], z, 0);
}
}
}
rc = Tcl_EvalObj(cbData->interp, cbData->pCode);
if( rc==TCL_CONTINUE ) rc = TCL_OK;
cbData->tcl_rc = rc;
return rc!=TCL_OK;
}
#endif
/*
** This is an alternative callback for database queries. Instead
** of invoking a TCL script to handle the result, this callback just
** appends each column of the result to a list. After the query
** is complete, the list is returned.
*/
static int DbEvalCallback2(
void *clientData, /* An instance of CallbackData */
int nCol, /* Number of columns in the result */
char ** azCol, /* Data for each column */
char ** azN /* Name for each column */
){
Tcl_Obj *pList = (Tcl_Obj*)clientData;
int i;
if( azCol==0 ) return 0;
for(i=0; i<nCol; i++){
Tcl_Obj *pElem;
if( azCol[i] && *azCol[i] ){
#ifdef UTF_TRANSLATION_NEEDED
Tcl_DString dCol;
Tcl_DStringInit(&dCol);
Tcl_ExternalToUtfDString(NULL, azCol[i], -1, &dCol);
pElem = Tcl_NewStringObj(Tcl_DStringValue(&dCol), -1);
Tcl_DStringFree(&dCol);
#else
pElem = Tcl_NewStringObj(azCol[i], -1);
#endif
}else{
pElem = Tcl_NewObj();
}
Tcl_ListObjAppendElement(0, pList, pElem);
}
return 0;
}
/*
** This is a second alternative callback for database queries. A the
** first column of the first row of the result is made the TCL result.
*/
static int DbEvalCallback3(
void *clientData, /* An instance of CallbackData */
int nCol, /* Number of columns in the result */
char ** azCol, /* Data for each column */
char ** azN /* Name for each column */
){
Tcl_Interp *interp = (Tcl_Interp*)clientData;
Tcl_Obj *pElem;
if( azCol==0 ) return 1;
if( nCol==0 ) return 1;
#ifdef UTF_TRANSLATION_NEEDED
{
Tcl_DString dCol;
Tcl_DStringInit(&dCol);
Tcl_ExternalToUtfDString(NULL, azCol[0], -1, &dCol);
pElem = Tcl_NewStringObj(Tcl_DStringValue(&dCol), -1);
Tcl_DStringFree(&dCol);
}
#else
pElem = Tcl_NewStringObj(azCol[0], -1);
#endif
Tcl_SetObjResult(interp, pElem);
return 1;
}
/*
** Called when the command is deleted.
*/
static void DbDeleteCmd(void *db){
SqliteDb *pDb = (SqliteDb*)db;
sqlite_close(pDb->db);
while( pDb->pFunc ){
SqlFunc *pFunc = pDb->pFunc;
pDb->pFunc = pFunc->pNext;
Tcl_Free((char*)pFunc);
}
if( pDb->zBusy ){
Tcl_Free(pDb->zBusy);
}
if( pDb->zTrace ){
Tcl_Free(pDb->zTrace);
}
if( pDb->zAuth ){
Tcl_Free(pDb->zAuth);
}
Tcl_Free((char*)pDb);
}
/*
** This routine is called when a database file is locked while trying
** to execute SQL.
*/
static int DbBusyHandler(void *cd, const char *zTable, int nTries){
SqliteDb *pDb = (SqliteDb*)cd;
int rc;
char zVal[30];
char *zCmd;
Tcl_DString cmd;
Tcl_DStringInit(&cmd);
Tcl_DStringAppend(&cmd, pDb->zBusy, -1);
Tcl_DStringAppendElement(&cmd, zTable);
sprintf(zVal, " %d", nTries);
Tcl_DStringAppend(&cmd, zVal, -1);
zCmd = Tcl_DStringValue(&cmd);
rc = Tcl_Eval(pDb->interp, zCmd);
Tcl_DStringFree(&cmd);
if( rc!=TCL_OK || atoi(Tcl_GetStringResult(pDb->interp)) ){
return 0;
}
return 1;
}
/*
** This routine is invoked as the 'progress callback' for the database.
*/
static int DbProgressHandler(void *cd){
SqliteDb *pDb = (SqliteDb*)cd;
int rc;
assert( pDb->zProgress );
rc = Tcl_Eval(pDb->interp, pDb->zProgress);
if( rc!=TCL_OK || atoi(Tcl_GetStringResult(pDb->interp)) ){
return 1;
}
return 0;
}
/*
** This routine is called by the SQLite trace handler whenever a new
** block of SQL is executed. The TCL script in pDb->zTrace is executed.
*/
static void DbTraceHandler(void *cd, const char *zSql){
SqliteDb *pDb = (SqliteDb*)cd;
Tcl_DString str;
Tcl_DStringInit(&str);
Tcl_DStringAppend(&str, pDb->zTrace, -1);
Tcl_DStringAppendElement(&str, zSql);
Tcl_Eval(pDb->interp, Tcl_DStringValue(&str));
Tcl_DStringFree(&str);
Tcl_ResetResult(pDb->interp);
}
/*
** This routine is called when a transaction is committed. The
** TCL script in pDb->zCommit is executed. If it returns non-zero or
** if it throws an exception, the transaction is rolled back instead
** of being committed.
*/
static int DbCommitHandler(void *cd){
SqliteDb *pDb = (SqliteDb*)cd;
int rc;
rc = Tcl_Eval(pDb->interp, pDb->zCommit);
if( rc!=TCL_OK || atoi(Tcl_GetStringResult(pDb->interp)) ){
return 1;
}
return 0;
}
/*
** This routine is called to evaluate an SQL function implemented
** using TCL script.
*/
static void tclSqlFunc(sqlite_func *context, int argc, const char **argv){
SqlFunc *p = sqlite_user_data(context);
Tcl_DString cmd;
int i;
int rc;
Tcl_DStringInit(&cmd);
Tcl_DStringAppend(&cmd, p->zScript, -1);
for(i=0; i<argc; i++){
Tcl_DStringAppendElement(&cmd, argv[i] ? argv[i] : "");
}
rc = Tcl_Eval(p->interp, Tcl_DStringValue(&cmd));
if( rc ){
sqlite_set_result_error(context, Tcl_GetStringResult(p->interp), -1);
}else{
sqlite_set_result_string(context, Tcl_GetStringResult(p->interp), -1);
}
}
#ifndef SQLITE_OMIT_AUTHORIZATION
/*
** This is the authentication function. It appends the authentication
** type code and the two arguments to zCmd[] then invokes the result
** on the interpreter. The reply is examined to determine if the
** authentication fails or succeeds.
*/
static int auth_callback(
void *pArg,
int code,
const char *zArg1,
const char *zArg2,
const char *zArg3,
const char *zArg4
){
char *zCode;
Tcl_DString str;
int rc;
const char *zReply;
SqliteDb *pDb = (SqliteDb*)pArg;
switch( code ){
case SQLITE_COPY : zCode="SQLITE_COPY"; break;
case SQLITE_CREATE_INDEX : zCode="SQLITE_CREATE_INDEX"; break;
case SQLITE_CREATE_TABLE : zCode="SQLITE_CREATE_TABLE"; break;
case SQLITE_CREATE_TEMP_INDEX : zCode="SQLITE_CREATE_TEMP_INDEX"; break;
case SQLITE_CREATE_TEMP_TABLE : zCode="SQLITE_CREATE_TEMP_TABLE"; break;
case SQLITE_CREATE_TEMP_TRIGGER: zCode="SQLITE_CREATE_TEMP_TRIGGER"; break;
case SQLITE_CREATE_TEMP_VIEW : zCode="SQLITE_CREATE_TEMP_VIEW"; break;
case SQLITE_CREATE_TRIGGER : zCode="SQLITE_CREATE_TRIGGER"; break;
case SQLITE_CREATE_VIEW : zCode="SQLITE_CREATE_VIEW"; break;
case SQLITE_DELETE : zCode="SQLITE_DELETE"; break;
case SQLITE_DROP_INDEX : zCode="SQLITE_DROP_INDEX"; break;
case SQLITE_DROP_TABLE : zCode="SQLITE_DROP_TABLE"; break;
case SQLITE_DROP_TEMP_INDEX : zCode="SQLITE_DROP_TEMP_INDEX"; break;
case SQLITE_DROP_TEMP_TABLE : zCode="SQLITE_DROP_TEMP_TABLE"; break;
case SQLITE_DROP_TEMP_TRIGGER : zCode="SQLITE_DROP_TEMP_TRIGGER"; break;
case SQLITE_DROP_TEMP_VIEW : zCode="SQLITE_DROP_TEMP_VIEW"; break;
case SQLITE_DROP_TRIGGER : zCode="SQLITE_DROP_TRIGGER"; break;
case SQLITE_DROP_VIEW : zCode="SQLITE_DROP_VIEW"; break;
case SQLITE_INSERT : zCode="SQLITE_INSERT"; break;
case SQLITE_PRAGMA : zCode="SQLITE_PRAGMA"; break;
case SQLITE_READ : zCode="SQLITE_READ"; break;
case SQLITE_SELECT : zCode="SQLITE_SELECT"; break;
case SQLITE_TRANSACTION : zCode="SQLITE_TRANSACTION"; break;
case SQLITE_UPDATE : zCode="SQLITE_UPDATE"; break;
case SQLITE_ATTACH : zCode="SQLITE_ATTACH"; break;
case SQLITE_DETACH : zCode="SQLITE_DETACH"; break;
default : zCode="????"; break;
}
Tcl_DStringInit(&str);
Tcl_DStringAppend(&str, pDb->zAuth, -1);
Tcl_DStringAppendElement(&str, zCode);
Tcl_DStringAppendElement(&str, zArg1 ? zArg1 : "");
Tcl_DStringAppendElement(&str, zArg2 ? zArg2 : "");
Tcl_DStringAppendElement(&str, zArg3 ? zArg3 : "");
Tcl_DStringAppendElement(&str, zArg4 ? zArg4 : "");
rc = Tcl_GlobalEval(pDb->interp, Tcl_DStringValue(&str));
Tcl_DStringFree(&str);
zReply = Tcl_GetStringResult(pDb->interp);
if( strcmp(zReply,"SQLITE_OK")==0 ){
rc = SQLITE_OK;
}else if( strcmp(zReply,"SQLITE_DENY")==0 ){
rc = SQLITE_DENY;
}else if( strcmp(zReply,"SQLITE_IGNORE")==0 ){
rc = SQLITE_IGNORE;
}else{
rc = 999;
}
return rc;
}
#endif /* SQLITE_OMIT_AUTHORIZATION */
/*
** The "sqlite" command below creates a new Tcl command for each
** connection it opens to an SQLite database. This routine is invoked
** whenever one of those connection-specific commands is executed
** in Tcl. For example, if you run Tcl code like this:
**
** sqlite db1 "my_database"
** db1 close
**
** The first command opens a connection to the "my_database" database
** and calls that connection "db1". The second command causes this
** subroutine to be invoked.
*/
static int DbObjCmd(void *cd, Tcl_Interp *interp, int objc,Tcl_Obj *const*objv){
SqliteDb *pDb = (SqliteDb*)cd;
int choice;
int rc = TCL_OK;
static const char *DB_strs[] = {
"authorizer", "busy", "changes",
"close", "commit_hook", "complete",
"errorcode", "eval", "function",
"last_insert_rowid", "last_statement_changes", "onecolumn",
"progress", "rekey", "timeout",
"trace",
0
};
enum DB_enum {
DB_AUTHORIZER, DB_BUSY, DB_CHANGES,
DB_CLOSE, DB_COMMIT_HOOK, DB_COMPLETE,
DB_ERRORCODE, DB_EVAL, DB_FUNCTION,
DB_LAST_INSERT_ROWID, DB_LAST_STATEMENT_CHANGES, DB_ONECOLUMN,
DB_PROGRESS, DB_REKEY, DB_TIMEOUT,
DB_TRACE
};
if( objc<2 ){
Tcl_WrongNumArgs(interp, 1, objv, "SUBCOMMAND ...");
return TCL_ERROR;
}
if( Tcl_GetIndexFromObj(interp, objv[1], DB_strs, "option", 0, &choice) ){
return TCL_ERROR;
}
switch( (enum DB_enum)choice ){
/* $db authorizer ?CALLBACK?
**
** Invoke the given callback to authorize each SQL operation as it is
** compiled. 5 arguments are appended to the callback before it is
** invoked:
**
** (1) The authorization type (ex: SQLITE_CREATE_TABLE, SQLITE_INSERT, ...)
** (2) First descriptive name (depends on authorization type)
** (3) Second descriptive name
** (4) Name of the database (ex: "main", "temp")
** (5) Name of trigger that is doing the access
**
** The callback should return on of the following strings: SQLITE_OK,
** SQLITE_IGNORE, or SQLITE_DENY. Any other return value is an error.
**
** If this method is invoked with no arguments, the current authorization
** callback string is returned.
*/
case DB_AUTHORIZER: {
if( objc>3 ){
Tcl_WrongNumArgs(interp, 2, objv, "?CALLBACK?");
}else if( objc==2 ){
if( pDb->zAuth ){
Tcl_AppendResult(interp, pDb->zAuth, 0);
}
}else{
char *zAuth;
int len;
if( pDb->zAuth ){
Tcl_Free(pDb->zAuth);
}
zAuth = Tcl_GetStringFromObj(objv[2], &len);
if( zAuth && len>0 ){
pDb->zAuth = Tcl_Alloc( len + 1 );
strcpy(pDb->zAuth, zAuth);
}else{
pDb->zAuth = 0;
}
#ifndef SQLITE_OMIT_AUTHORIZATION
if( pDb->zAuth ){
pDb->interp = interp;
sqlite_set_authorizer(pDb->db, auth_callback, pDb);
}else{
sqlite_set_authorizer(pDb->db, 0, 0);
}
#endif
}
break;
}
/* $db busy ?CALLBACK?
**
** Invoke the given callback if an SQL statement attempts to open
** a locked database file.
*/
case DB_BUSY: {
if( objc>3 ){
Tcl_WrongNumArgs(interp, 2, objv, "CALLBACK");
return TCL_ERROR;
}else if( objc==2 ){
if( pDb->zBusy ){
Tcl_AppendResult(interp, pDb->zBusy, 0);
}
}else{
char *zBusy;
int len;
if( pDb->zBusy ){
Tcl_Free(pDb->zBusy);
}
zBusy = Tcl_GetStringFromObj(objv[2], &len);
if( zBusy && len>0 ){
pDb->zBusy = Tcl_Alloc( len + 1 );
strcpy(pDb->zBusy, zBusy);
}else{
pDb->zBusy = 0;
}
if( pDb->zBusy ){
pDb->interp = interp;
sqlite_busy_handler(pDb->db, DbBusyHandler, pDb);
}else{
sqlite_busy_handler(pDb->db, 0, 0);
}
}
break;
}
/* $db progress ?N CALLBACK?
**
** Invoke the given callback every N virtual machine opcodes while executing
** queries.
*/
case DB_PROGRESS: {
if( objc==2 ){
if( pDb->zProgress ){
Tcl_AppendResult(interp, pDb->zProgress, 0);
}
}else if( objc==4 ){
char *zProgress;
int len;
int N;
if( TCL_OK!=Tcl_GetIntFromObj(interp, objv[2], &N) ){
return TCL_ERROR;
};
if( pDb->zProgress ){
Tcl_Free(pDb->zProgress);
}
zProgress = Tcl_GetStringFromObj(objv[3], &len);
if( zProgress && len>0 ){
pDb->zProgress = Tcl_Alloc( len + 1 );
strcpy(pDb->zProgress, zProgress);
}else{
pDb->zProgress = 0;
}
#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
if( pDb->zProgress ){
pDb->interp = interp;
sqlite_progress_handler(pDb->db, N, DbProgressHandler, pDb);
}else{
sqlite_progress_handler(pDb->db, 0, 0, 0);
}
#endif
}else{
Tcl_WrongNumArgs(interp, 2, objv, "N CALLBACK");
return TCL_ERROR;
}
break;
}
/*
** $db changes
**
** Return the number of rows that were modified, inserted, or deleted by
** the most recent "eval".
*/
case DB_CHANGES: {
Tcl_Obj *pResult;
int nChange;
if( objc!=2 ){
Tcl_WrongNumArgs(interp, 2, objv, "");
return TCL_ERROR;
}
nChange = sqlite_changes(pDb->db);
pResult = Tcl_GetObjResult(interp);
Tcl_SetIntObj(pResult, nChange);
break;
}
/*
** $db last_statement_changes
**
** Return the number of rows that were modified, inserted, or deleted by
** the last statment to complete execution (excluding changes due to
** triggers)
*/
case DB_LAST_STATEMENT_CHANGES: {
Tcl_Obj *pResult;
int lsChange;
if( objc!=2 ){
Tcl_WrongNumArgs(interp, 2, objv, "");
return TCL_ERROR;
}
lsChange = sqlite_last_statement_changes(pDb->db);
pResult = Tcl_GetObjResult(interp);
Tcl_SetIntObj(pResult, lsChange);
break;
}
/* $db close
**
** Shutdown the database
*/
case DB_CLOSE: {
Tcl_DeleteCommand(interp, Tcl_GetStringFromObj(objv[0], 0));
break;
}
/* $db commit_hook ?CALLBACK?
**
** Invoke the given callback just before committing every SQL transaction.
** If the callback throws an exception or returns non-zero, then the
** transaction is aborted. If CALLBACK is an empty string, the callback
** is disabled.
*/
case DB_COMMIT_HOOK: {
if( objc>3 ){
Tcl_WrongNumArgs(interp, 2, objv, "?CALLBACK?");
}else if( objc==2 ){
if( pDb->zCommit ){
Tcl_AppendResult(interp, pDb->zCommit, 0);
}
}else{
char *zCommit;
int len;
if( pDb->zCommit ){
Tcl_Free(pDb->zCommit);
}
zCommit = Tcl_GetStringFromObj(objv[2], &len);
if( zCommit && len>0 ){
pDb->zCommit = Tcl_Alloc( len + 1 );
strcpy(pDb->zCommit, zCommit);
}else{
pDb->zCommit = 0;
}
if( pDb->zCommit ){
pDb->interp = interp;
sqlite_commit_hook(pDb->db, DbCommitHandler, pDb);
}else{
sqlite_commit_hook(pDb->db, 0, 0);
}
}
break;
}
/* $db complete SQL
**
** Return TRUE if SQL is a complete SQL statement. Return FALSE if
** additional lines of input are needed. This is similar to the
** built-in "info complete" command of Tcl.
*/
case DB_COMPLETE: {
Tcl_Obj *pResult;
int isComplete;
if( objc!=3 ){
Tcl_WrongNumArgs(interp, 2, objv, "SQL");
return TCL_ERROR;
}
isComplete = sqlite_complete( Tcl_GetStringFromObj(objv[2], 0) );
pResult = Tcl_GetObjResult(interp);
Tcl_SetBooleanObj(pResult, isComplete);
break;
}
/*
** $db errorcode
**
** Return the numeric error code that was returned by the most recent
** call to sqlite_exec().
*/
case DB_ERRORCODE: {
Tcl_SetObjResult(interp, Tcl_NewIntObj(pDb->rc));
break;
}
/*
** $db eval $sql ?array { ...code... }?
**
** The SQL statement in $sql is evaluated. For each row, the values are
** placed in elements of the array named "array" and ...code... is executed.
** If "array" and "code" are omitted, then no callback is every invoked.
** If "array" is an empty string, then the values are placed in variables
** that have the same name as the fields extracted by the query.
*/
case DB_EVAL: {
CallbackData cbData;
char *zErrMsg;
char *zSql;
#ifdef UTF_TRANSLATION_NEEDED
Tcl_DString dSql;
int i;
#endif
if( objc!=5 && objc!=3 ){
Tcl_WrongNumArgs(interp, 2, objv, "SQL ?ARRAY-NAME CODE?");
return TCL_ERROR;
}
pDb->interp = interp;
zSql = Tcl_GetStringFromObj(objv[2], 0);
#ifdef UTF_TRANSLATION_NEEDED
Tcl_DStringInit(&dSql);
Tcl_UtfToExternalDString(NULL, zSql, -1, &dSql);
zSql = Tcl_DStringValue(&dSql);
#endif
Tcl_IncrRefCount(objv[2]);
if( objc==5 ){
cbData.interp = interp;
cbData.once = 1;
cbData.zArray = Tcl_GetStringFromObj(objv[3], 0);
cbData.pCode = objv[4];
cbData.tcl_rc = TCL_OK;
cbData.nColName = 0;
cbData.azColName = 0;
zErrMsg = 0;
Tcl_IncrRefCount(objv[3]);
Tcl_IncrRefCount(objv[4]);
rc = sqlite_exec(pDb->db, zSql, DbEvalCallback, &cbData, &zErrMsg);
Tcl_DecrRefCount(objv[4]);
Tcl_DecrRefCount(objv[3]);
if( cbData.tcl_rc==TCL_BREAK ){ cbData.tcl_rc = TCL_OK; }
}else{
Tcl_Obj *pList = Tcl_NewObj();
cbData.tcl_rc = TCL_OK;
rc = sqlite_exec(pDb->db, zSql, DbEvalCallback2, pList, &zErrMsg);
Tcl_SetObjResult(interp, pList);
}
pDb->rc = rc;
if( rc==SQLITE_ABORT ){
if( zErrMsg ) free(zErrMsg);
rc = cbData.tcl_rc;
}else if( zErrMsg ){
Tcl_SetResult(interp, zErrMsg, TCL_VOLATILE);
free(zErrMsg);
rc = TCL_ERROR;
}else if( rc!=SQLITE_OK ){
Tcl_AppendResult(interp, sqlite_error_string(rc), 0);
rc = TCL_ERROR;
}else{
}
Tcl_DecrRefCount(objv[2]);
#ifdef UTF_TRANSLATION_NEEDED
Tcl_DStringFree(&dSql);
if( objc==5 && cbData.azColName ){
for(i=0; i<cbData.nColName; i++){
if( cbData.azColName[i] ) free(cbData.azColName[i]);
}
free(cbData.azColName);
cbData.azColName = 0;
}
#endif
return rc;
}
/*
** $db function NAME SCRIPT
**
** Create a new SQL function called NAME. Whenever that function is
** called, invoke SCRIPT to evaluate the function.
*/
case DB_FUNCTION: {
SqlFunc *pFunc;
char *zName;
char *zScript;
int nScript;
if( objc!=4 ){
Tcl_WrongNumArgs(interp, 2, objv, "NAME SCRIPT");
return TCL_ERROR;
}
zName = Tcl_GetStringFromObj(objv[2], 0);
zScript = Tcl_GetStringFromObj(objv[3], &nScript);
pFunc = (SqlFunc*)Tcl_Alloc( sizeof(*pFunc) + nScript + 1 );
if( pFunc==0 ) return TCL_ERROR;
pFunc->interp = interp;
pFunc->pNext = pDb->pFunc;
pFunc->zScript = (char*)&pFunc[1];
strcpy(pFunc->zScript, zScript);
sqlite_create_function(pDb->db, zName, -1, tclSqlFunc, pFunc);
sqlite_function_type(pDb->db, zName, SQLITE_NUMERIC);
break;
}
/*
** $db last_insert_rowid
**
** Return an integer which is the ROWID for the most recent insert.
*/
case DB_LAST_INSERT_ROWID: {
Tcl_Obj *pResult;
int rowid;
if( objc!=2 ){
Tcl_WrongNumArgs(interp, 2, objv, "");
return TCL_ERROR;
}
rowid = sqlite_last_insert_rowid(pDb->db);
pResult = Tcl_GetObjResult(interp);
Tcl_SetIntObj(pResult, rowid);
break;
}
/*
** $db onecolumn SQL
**
** Return a single column from a single row of the given SQL query.
*/
case DB_ONECOLUMN: {
char *zSql;
char *zErrMsg = 0;
if( objc!=3 ){
Tcl_WrongNumArgs(interp, 2, objv, "SQL");
return TCL_ERROR;
}
zSql = Tcl_GetStringFromObj(objv[2], 0);
rc = sqlite_exec(pDb->db, zSql, DbEvalCallback3, interp, &zErrMsg);
if( rc==SQLITE_ABORT ){
rc = SQLITE_OK;
}else if( zErrMsg ){
Tcl_SetResult(interp, zErrMsg, TCL_VOLATILE);
free(zErrMsg);
rc = TCL_ERROR;
}else if( rc!=SQLITE_OK ){
Tcl_AppendResult(interp, sqlite_error_string(rc), 0);
rc = TCL_ERROR;
}
break;
}
/*
** $db rekey KEY
**
** Change the encryption key on the currently open database.
*/
case DB_REKEY: {
int nKey;
void *pKey;
if( objc!=3 ){
Tcl_WrongNumArgs(interp, 2, objv, "KEY");
return TCL_ERROR;
}
pKey = Tcl_GetByteArrayFromObj(objv[2], &nKey);
#ifdef SQLITE_HAS_CODEC
rc = sqlite_rekey(pDb->db, pKey, nKey);
if( rc ){
Tcl_AppendResult(interp, sqlite_error_string(rc), 0);
rc = TCL_ERROR;
}
#endif
break;
}
/*
** $db timeout MILLESECONDS
**
** Delay for the number of milliseconds specified when a file is locked.
*/
case DB_TIMEOUT: {
int ms;
if( objc!=3 ){
Tcl_WrongNumArgs(interp, 2, objv, "MILLISECONDS");
return TCL_ERROR;
}
if( Tcl_GetIntFromObj(interp, objv[2], &ms) ) return TCL_ERROR;
sqlite_busy_timeout(pDb->db, ms);
break;
}
/* $db trace ?CALLBACK?
**
** Make arrangements to invoke the CALLBACK routine for each SQL statement
** that is executed. The text of the SQL is appended to CALLBACK before
** it is executed.
*/
case DB_TRACE: {
if( objc>3 ){
Tcl_WrongNumArgs(interp, 2, objv, "?CALLBACK?");
}else if( objc==2 ){
if( pDb->zTrace ){
Tcl_AppendResult(interp, pDb->zTrace, 0);
}
}else{
char *zTrace;
int len;
if( pDb->zTrace ){
Tcl_Free(pDb->zTrace);
}
zTrace = Tcl_GetStringFromObj(objv[2], &len);
if( zTrace && len>0 ){
pDb->zTrace = Tcl_Alloc( len + 1 );
strcpy(pDb->zTrace, zTrace);
}else{
pDb->zTrace = 0;
}
if( pDb->zTrace ){
pDb->interp = interp;
sqlite_trace(pDb->db, DbTraceHandler, pDb);
}else{
sqlite_trace(pDb->db, 0, 0);
}
}
break;
}
} /* End of the SWITCH statement */
return rc;
}
/*
** sqlite DBNAME FILENAME ?MODE? ?-key KEY?
**
** This is the main Tcl command. When the "sqlite" Tcl command is
** invoked, this routine runs to process that command.
**
** The first argument, DBNAME, is an arbitrary name for a new
** database connection. This command creates a new command named
** DBNAME that is used to control that connection. The database
** connection is deleted when the DBNAME command is deleted.
**
** The second argument is the name of the directory that contains
** the sqlite database that is to be accessed.
**
** For testing purposes, we also support the following:
**
** sqlite -encoding
**
** Return the encoding used by LIKE and GLOB operators. Choices
** are UTF-8 and iso8859.
**
** sqlite -version
**
** Return the version number of the SQLite library.
**
** sqlite -tcl-uses-utf
**
** Return "1" if compiled with a Tcl uses UTF-8. Return "0" if
** not. Used by tests to make sure the library was compiled
** correctly.
*/
static int DbMain(void *cd, Tcl_Interp *interp, int objc,Tcl_Obj *const*objv){
int mode;
SqliteDb *p;
void *pKey = 0;
int nKey = 0;
const char *zArg;
char *zErrMsg;
const char *zFile;
char zBuf[80];
if( objc==2 ){
zArg = Tcl_GetStringFromObj(objv[1], 0);
if( strcmp(zArg,"-encoding")==0 ){
Tcl_AppendResult(interp,sqlite_encoding,0);
return TCL_OK;
}
if( strcmp(zArg,"-version")==0 ){
Tcl_AppendResult(interp,sqlite_version,0);
return TCL_OK;
}
if( strcmp(zArg,"-has-codec")==0 ){
#ifdef SQLITE_HAS_CODEC
Tcl_AppendResult(interp,"1",0);
#else
Tcl_AppendResult(interp,"0",0);
#endif
return TCL_OK;
}
if( strcmp(zArg,"-tcl-uses-utf")==0 ){
#ifdef TCL_UTF_MAX
Tcl_AppendResult(interp,"1",0);
#else
Tcl_AppendResult(interp,"0",0);
#endif
return TCL_OK;
}
}
if( objc==5 || objc==6 ){
zArg = Tcl_GetStringFromObj(objv[objc-2], 0);
if( strcmp(zArg,"-key")==0 ){
pKey = Tcl_GetByteArrayFromObj(objv[objc-1], &nKey);
objc -= 2;
}
}
if( objc!=3 && objc!=4 ){
Tcl_WrongNumArgs(interp, 1, objv,
#ifdef SQLITE_HAS_CODEC
"HANDLE FILENAME ?-key CODEC-KEY?"
#else
"HANDLE FILENAME ?MODE?"
#endif
);
return TCL_ERROR;
}
if( objc==3 ){
mode = 0666;
}else if( Tcl_GetIntFromObj(interp, objv[3], &mode)!=TCL_OK ){
return TCL_ERROR;
}
zErrMsg = 0;
p = (SqliteDb*)Tcl_Alloc( sizeof(*p) );
if( p==0 ){
Tcl_SetResult(interp, "malloc failed", TCL_STATIC);
return TCL_ERROR;
}
memset(p, 0, sizeof(*p));
zFile = Tcl_GetStringFromObj(objv[2], 0);
#ifdef SQLITE_HAS_CODEC
p->db = sqlite_open_encrypted(zFile, pKey, nKey, 0, &zErrMsg);
#else
p->db = sqlite_open(zFile, mode, &zErrMsg);
#endif
if( p->db==0 ){
Tcl_SetResult(interp, zErrMsg, TCL_VOLATILE);
Tcl_Free((char*)p);
free(zErrMsg);
return TCL_ERROR;
}
zArg = Tcl_GetStringFromObj(objv[1], 0);
Tcl_CreateObjCommand(interp, zArg, DbObjCmd, (char*)p, DbDeleteCmd);
/* The return value is the value of the sqlite* pointer
*/
sprintf(zBuf, "%p", p->db);
if( strncmp(zBuf,"0x",2) ){
sprintf(zBuf, "0x%p", p->db);
}
Tcl_AppendResult(interp, zBuf, 0);
/* If compiled with SQLITE_TEST turned on, then register the "md5sum"
** SQL function.
*/
#ifdef SQLITE_TEST
{
extern void Md5_Register(sqlite*);
Md5_Register(p->db);
}
#endif
return TCL_OK;
}
/*
** Provide a dummy Tcl_InitStubs if we are using this as a static
** library.
*/
#ifndef USE_TCL_STUBS
# undef Tcl_InitStubs
# define Tcl_InitStubs(a,b,c)
#endif
/*
** Initialize this module.
**
** This Tcl module contains only a single new Tcl command named "sqlite".
** (Hence there is no namespace. There is no point in using a namespace
** if the extension only supplies one new name!) The "sqlite" command is
** used to open a new SQLite database. See the DbMain() routine above
** for additional information.
*/
int Sqlite_Init(Tcl_Interp *interp){
Tcl_InitStubs(interp, "8.0", 0);
Tcl_CreateObjCommand(interp, "sqlite", (Tcl_ObjCmdProc*)DbMain, 0, 0);
Tcl_PkgProvide(interp, "sqlite", "2.0");
return TCL_OK;
}
int Tclsqlite_Init(Tcl_Interp *interp){
Tcl_InitStubs(interp, "8.0", 0);
Tcl_CreateObjCommand(interp, "sqlite", (Tcl_ObjCmdProc*)DbMain, 0, 0);
Tcl_PkgProvide(interp, "sqlite", "2.0");
return TCL_OK;
}
int Sqlite_SafeInit(Tcl_Interp *interp){
return TCL_OK;
}
int Tclsqlite_SafeInit(Tcl_Interp *interp){
return TCL_OK;
}
#if 0
/*
** If compiled using mktclapp, this routine runs to initialize
** everything.
*/
int Et_AppInit(Tcl_Interp *interp){
return Sqlite_Init(interp);
}
#endif
/*
** If the macro TCLSH is defined and is one, then put in code for the
** "main" routine that will initialize Tcl.
*/
#if defined(TCLSH) && TCLSH==1
static char zMainloop[] =
"set line {}\n"
"while {![eof stdin]} {\n"
"if {$line!=\"\"} {\n"
"puts -nonewline \"> \"\n"
"} else {\n"
"puts -nonewline \"% \"\n"
"}\n"
"flush stdout\n"
"append line [gets stdin]\n"
"if {[info complete $line]} {\n"
"if {[catch {uplevel #0 $line} result]} {\n"
"puts stderr \"Error: $result\"\n"
"} elseif {$result!=\"\"} {\n"
"puts $result\n"
"}\n"
"set line {}\n"
"} else {\n"
"append line \\n\n"
"}\n"
"}\n"
;
#define TCLSH_MAIN main /* Needed to fake out mktclapp */
int TCLSH_MAIN(int argc, char **argv){
Tcl_Interp *interp;
Tcl_FindExecutable(argv[0]);
interp = Tcl_CreateInterp();
Sqlite_Init(interp);
#ifdef SQLITE_TEST
{
extern int Sqlitetest1_Init(Tcl_Interp*);
extern int Sqlitetest2_Init(Tcl_Interp*);
extern int Sqlitetest3_Init(Tcl_Interp*);
extern int Sqlitetest4_Init(Tcl_Interp*);
extern int Md5_Init(Tcl_Interp*);
Sqlitetest1_Init(interp);
Sqlitetest2_Init(interp);
Sqlitetest3_Init(interp);
Sqlitetest4_Init(interp);
Md5_Init(interp);
}
#endif
if( argc>=2 ){
int i;
Tcl_SetVar(interp,"argv0",argv[1],TCL_GLOBAL_ONLY);
Tcl_SetVar(interp,"argv", "", TCL_GLOBAL_ONLY);
for(i=2; i<argc; i++){
Tcl_SetVar(interp, "argv", argv[i],
TCL_GLOBAL_ONLY | TCL_LIST_ELEMENT | TCL_APPEND_VALUE);
}
if( Tcl_EvalFile(interp, argv[1])!=TCL_OK ){
const char *zInfo = Tcl_GetVar(interp, "errorInfo", TCL_GLOBAL_ONLY);
if( zInfo==0 ) zInfo = interp->result;
fprintf(stderr,"%s: %s\n", *argv, zInfo);
return 1;
}
}else{
Tcl_GlobalEval(interp, zMainloop);
}
return 0;
}
#endif /* TCLSH */
#endif /* !defined(NO_TCL) */
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