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330 lines (294 loc) · 9.51 KB
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/*
** 2014 October 30
**
** 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.
**
*************************************************************************
**
*/
#include "sqliteInt.h"
#if defined(INCLUDE_SQLITE_TCL_H)
# include "sqlite_tcl.h"
#else
# include "tcl.h"
#endif
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#ifndef SQLITE_OMIT_INCRBLOB
/* These functions are implemented in main.c. */
extern const char *sqlite3ErrName(int);
/* From test1.c: */
extern int getDbPointer(Tcl_Interp *interp, const char *zA, sqlite3 **ppDb);
extern void *sqlite3TestTextToPtr(const char *z);
/*
** Return a pointer to a buffer containing a text representation of the
** pointer passed as the only argument. The original pointer may be extracted
** from the text using sqlite3TestTextToPtr().
*/
static char *ptrToText(void *p){
static char buf[100];
sqlite3_snprintf(sizeof(buf)-1, buf, "%p", p);
return buf;
}
/*
** Attempt to extract a blob handle (type sqlite3_blob*) from the Tcl
** object passed as the second argument. If successful, set *ppBlob to
** point to the blob handle and return TCL_OK. Otherwise, store an error
** message in the tcl interpreter and return TCL_ERROR. The final value
** of *ppBlob is undefined in this case.
**
** If the object contains a string that begins with "incrblob_", then it
** is assumed to be the name of a Tcl channel opened using the [db incrblob]
** command (see tclsqlite.c). Otherwise, it is assumed to be a pointer
** encoded using the ptrToText() routine or similar.
*/
static int blobHandleFromObj(
Tcl_Interp *interp,
Tcl_Obj *pObj,
sqlite3_blob **ppBlob
){
char *z;
int n;
z = Tcl_GetStringFromObj(pObj, &n);
if( n==0 ){
*ppBlob = 0;
}else if( n>9 && 0==memcmp("incrblob_", z, 9) ){
int notUsed;
Tcl_Channel channel;
ClientData instanceData;
channel = Tcl_GetChannel(interp, z, ¬Used);
if( !channel ) return TCL_ERROR;
Tcl_Flush(channel);
Tcl_Seek(channel, 0, SEEK_SET);
instanceData = Tcl_GetChannelInstanceData(channel);
*ppBlob = *((sqlite3_blob **)instanceData);
}else{
*ppBlob = (sqlite3_blob*)sqlite3TestTextToPtr(z);
}
return TCL_OK;
}
/*
** Like Tcl_GetString(), except that if the string is 0 bytes in size, a
** NULL Pointer is returned.
*/
static char *blobStringFromObj(Tcl_Obj *pObj){
int n;
char *z;
z = Tcl_GetStringFromObj(pObj, &n);
return (n ? z : 0);
}
/*
** sqlite3_blob_open DB DATABASE TABLE COLUMN ROWID FLAGS VARNAME
**
** Tcl test harness for the sqlite3_blob_open() function.
*/
static int SQLITE_TCLAPI test_blob_open(
ClientData clientData, /* Not used */
Tcl_Interp *interp, /* Calling TCL interpreter */
int objc, /* Number of arguments */
Tcl_Obj *CONST objv[] /* Command arguments */
){
sqlite3 *db;
const char *zDb;
const char *zTable;
const char *zColumn;
Tcl_WideInt iRowid;
int flags;
const char *zVarname;
int nVarname;
sqlite3_blob *pBlob = (sqlite3_blob*)&flags; /* Non-zero initialization */
int rc;
if( objc!=8 ){
const char *zUsage = "DB DATABASE TABLE COLUMN ROWID FLAGS VARNAME";
Tcl_WrongNumArgs(interp, 1, objv, zUsage);
return TCL_ERROR;
}
if( getDbPointer(interp, Tcl_GetString(objv[1]), &db) ) return TCL_ERROR;
zDb = Tcl_GetString(objv[2]);
zTable = blobStringFromObj(objv[3]);
zColumn = Tcl_GetString(objv[4]);
if( Tcl_GetWideIntFromObj(interp, objv[5], &iRowid) ) return TCL_ERROR;
if( Tcl_GetIntFromObj(interp, objv[6], &flags) ) return TCL_ERROR;
zVarname = Tcl_GetStringFromObj(objv[7], &nVarname);
if( nVarname>0 ){
rc = sqlite3_blob_open(db, zDb, zTable, zColumn, iRowid, flags, &pBlob);
Tcl_SetVar(interp, zVarname, ptrToText(pBlob), 0);
}else{
rc = sqlite3_blob_open(db, zDb, zTable, zColumn, iRowid, flags, 0);
}
if( rc==SQLITE_OK ){
Tcl_ResetResult(interp);
}else{
Tcl_SetResult(interp, (char*)sqlite3ErrName(rc), TCL_VOLATILE);
return TCL_ERROR;
}
return TCL_OK;
}
/*
** sqlite3_blob_close HANDLE
*/
static int SQLITE_TCLAPI test_blob_close(
ClientData clientData, /* Not used */
Tcl_Interp *interp, /* The TCL interpreter that invoked this command */
int objc, /* Number of arguments */
Tcl_Obj *CONST objv[] /* Command arguments */
){
sqlite3_blob *pBlob;
int rc;
if( objc!=2 ){
Tcl_WrongNumArgs(interp, 1, objv, "HANDLE");
return TCL_ERROR;
}
if( blobHandleFromObj(interp, objv[1], &pBlob) ) return TCL_ERROR;
rc = sqlite3_blob_close(pBlob);
if( rc ){
Tcl_SetResult(interp, (char*)sqlite3ErrName(rc), TCL_VOLATILE);
}else{
Tcl_ResetResult(interp);
}
return TCL_OK;
}
/*
** sqlite3_blob_bytes HANDLE
*/
static int SQLITE_TCLAPI test_blob_bytes(
ClientData clientData, /* Not used */
Tcl_Interp *interp, /* The TCL interpreter that invoked this command */
int objc, /* Number of arguments */
Tcl_Obj *CONST objv[] /* Command arguments */
){
sqlite3_blob *pBlob;
int nByte;
if( objc!=2 ){
Tcl_WrongNumArgs(interp, 1, objv, "HANDLE");
return TCL_ERROR;
}
if( blobHandleFromObj(interp, objv[1], &pBlob) ) return TCL_ERROR;
nByte = sqlite3_blob_bytes(pBlob);
Tcl_SetObjResult(interp, Tcl_NewIntObj(nByte));
return TCL_OK;
}
/*
** sqlite3_blob_read CHANNEL OFFSET N
**
** This command is used to test the sqlite3_blob_read() in ways that
** the Tcl channel interface does not. The first argument should
** be the name of a valid channel created by the [incrblob] method
** of a database handle. This function calls sqlite3_blob_read()
** to read N bytes from offset OFFSET from the underlying SQLite
** blob handle.
**
** On success, a byte-array object containing the read data is
** returned. On failure, the interpreter result is set to the
** text representation of the returned error code (i.e. "SQLITE_NOMEM")
** and a Tcl exception is thrown.
*/
static int SQLITE_TCLAPI test_blob_read(
ClientData clientData, /* Not used */
Tcl_Interp *interp, /* The TCL interpreter that invoked this command */
int objc, /* Number of arguments */
Tcl_Obj *CONST objv[] /* Command arguments */
){
sqlite3_blob *pBlob;
int nByte;
int iOffset;
unsigned char *zBuf = 0;
int rc;
if( objc!=4 ){
Tcl_WrongNumArgs(interp, 1, objv, "CHANNEL OFFSET N");
return TCL_ERROR;
}
if( blobHandleFromObj(interp, objv[1], &pBlob) ) return TCL_ERROR;
if( TCL_OK!=Tcl_GetIntFromObj(interp, objv[2], &iOffset)
|| TCL_OK!=Tcl_GetIntFromObj(interp, objv[3], &nByte)
){
return TCL_ERROR;
}
if( nByte>0 ){
zBuf = (unsigned char *)Tcl_AttemptAlloc(nByte);
if( zBuf==0 ){
Tcl_AppendResult(interp, "out of memory in " __FILE__, 0);
return TCL_ERROR;
}
}
rc = sqlite3_blob_read(pBlob, zBuf, nByte, iOffset);
if( rc==SQLITE_OK ){
Tcl_SetObjResult(interp, Tcl_NewByteArrayObj(zBuf, nByte));
}else{
Tcl_SetResult(interp, (char *)sqlite3ErrName(rc), TCL_VOLATILE);
}
Tcl_Free((char *)zBuf);
return (rc==SQLITE_OK ? TCL_OK : TCL_ERROR);
}
/*
** sqlite3_blob_write HANDLE OFFSET DATA ?NDATA?
**
** This command is used to test the sqlite3_blob_write() in ways that
** the Tcl channel interface does not. The first argument should
** be the name of a valid channel created by the [incrblob] method
** of a database handle. This function calls sqlite3_blob_write()
** to write the DATA byte-array to the underlying SQLite blob handle.
** at offset OFFSET.
**
** On success, an empty string is returned. On failure, the interpreter
** result is set to the text representation of the returned error code
** (i.e. "SQLITE_NOMEM") and a Tcl exception is thrown.
*/
static int SQLITE_TCLAPI test_blob_write(
ClientData clientData, /* Not used */
Tcl_Interp *interp, /* The TCL interpreter that invoked this command */
int objc, /* Number of arguments */
Tcl_Obj *CONST objv[] /* Command arguments */
){
sqlite3_blob *pBlob;
int iOffset;
int rc;
unsigned char *zBuf;
int nBuf;
if( objc!=4 && objc!=5 ){
Tcl_WrongNumArgs(interp, 1, objv, "HANDLE OFFSET DATA ?NDATA?");
return TCL_ERROR;
}
if( blobHandleFromObj(interp, objv[1], &pBlob) ) return TCL_ERROR;
if( TCL_OK!=Tcl_GetIntFromObj(interp, objv[2], &iOffset) ){
return TCL_ERROR;
}
zBuf = Tcl_GetByteArrayFromObj(objv[3], &nBuf);
if( objc==5 && Tcl_GetIntFromObj(interp, objv[4], &nBuf) ){
return TCL_ERROR;
}
rc = sqlite3_blob_write(pBlob, zBuf, nBuf, iOffset);
if( rc!=SQLITE_OK ){
Tcl_SetResult(interp, (char *)sqlite3ErrName(rc), TCL_VOLATILE);
}
return (rc==SQLITE_OK ? TCL_OK : TCL_ERROR);
}
#endif /* SQLITE_OMIT_INCRBLOB */
/*
** Register commands with the TCL interpreter.
*/
int Sqlitetest_blob_Init(Tcl_Interp *interp){
#ifndef SQLITE_OMIT_INCRBLOB
static struct {
char *zName;
Tcl_ObjCmdProc *xProc;
} aObjCmd[] = {
{ "sqlite3_blob_open", test_blob_open },
{ "sqlite3_blob_close", test_blob_close },
{ "sqlite3_blob_bytes", test_blob_bytes },
{ "sqlite3_blob_read", test_blob_read },
{ "sqlite3_blob_write", test_blob_write },
};
int i;
for(i=0; i<sizeof(aObjCmd)/sizeof(aObjCmd[0]); i++){
Tcl_CreateObjCommand(interp, aObjCmd[i].zName, aObjCmd[i].xProc, 0, 0);
}
#endif /* SQLITE_OMIT_INCRBLOB */
return TCL_OK;
}