/* Append a varint to a DocList's data. */
static void appendVarint(DocList *d, sqlite_int64 i){
char c[VARINT_MAX];
int n = putVarint(c, i);
d->pData = realloc(d->pData, d->nData + n);
memcpy(d->pData + d->nData, c, n);
d->nData += n;
}
/*
** usage: varint_test START MULTIPLIER COUNT INCREMENT
**
** This command tests the putVarint() and getVarint()
** routines, both for accuracy and for speed.
**
** An integer is written using putVarint() and read back with
** getVarint() and varified to be unchanged. This repeats COUNT
** times. The first integer is START*MULTIPLIER. Each iteration
** increases the integer by INCREMENT.
**
** This command returns nothing if it works. It returns an error message
** if something goes wrong.
*/
static int btree_varint_test(
void *NotUsed,
Tcl_Interp *interp, /* The TCL interpreter that invoked this command */
int argc, /* Number of arguments */
const char **argv /* Text of each argument */
){
u32 start, mult, count, incr;
u64 in, out;
int n1, n2, i, j;
unsigned char zBuf[100];
if( argc!=5 ){
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
" START MULTIPLIER COUNT INCREMENT\"", 0);
return TCL_ERROR;
}
if( Tcl_GetInt(interp, argv[1], (int*)&start) ) return TCL_ERROR;
if( Tcl_GetInt(interp, argv[2], (int*)&mult) ) return TCL_ERROR;
if( Tcl_GetInt(interp, argv[3], (int*)&count) ) return TCL_ERROR;
if( Tcl_GetInt(interp, argv[4], (int*)&incr) ) return TCL_ERROR;
in = start;
in *= mult;
for(i=0; i<count; i++){
char zErr[200];
n1 = putVarint(zBuf, in);
if( n1>9 || n1<1 ){
sprintf(zErr, "putVarint returned %d - should be between 1 and 9", n1);
Tcl_AppendResult(interp, zErr, 0);
return TCL_ERROR;
}
n2 = getVarint(zBuf, &out);
if( n1!=n2 ){
sprintf(zErr, "putVarint returned %d and getVarint returned %d", n1, n2);
Tcl_AppendResult(interp, zErr, 0);
return TCL_ERROR;
}
if( in!=out ){
sprintf(zErr, "Wrote 0x%016llx and got back 0x%016llx", in, out);
Tcl_AppendResult(interp, zErr, 0);
return TCL_ERROR;
}
if( (in & 0xffffffff)==in ){
u32 out32;
n2 = getVarint32(zBuf, out32);
out = out32;
if( n1!=n2 ){
sprintf(zErr, "putVarint returned %d and GetVarint32 returned %d",
n1, n2);
Tcl_AppendResult(interp, zErr, 0);
return TCL_ERROR;
}
if( in!=out ){
sprintf(zErr, "Wrote 0x%016llx and got back 0x%016llx from GetVarint32",
in, out);
Tcl_AppendResult(interp, zErr, 0);
return TCL_ERROR;
}
}
/* In order to get realistic timings, run getVarint 19 more times.
** This is because getVarint is called about 20 times more often
** than putVarint.
*/
for(j=0; j<19; j++){
getVarint(zBuf, &out);
}
in += incr;
}
return TCL_OK;
}
