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Add an experimental "pointer type" parameter to sqlite3_bind_pointer(),

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sqlite3_result_pointer(), and sqlite3_value_pointer().  The pointer type is
a string that must compare equal using strcmp() or else the pointer comes
through as a NULL.

FossilOrigin-Name: 211cce04e97d2e325a6ea3e99738fc71115d673dc13daeffb03ac3140deb11de
This commit is contained in:
drh
2017-07-17 00:40:19 +00:00
parent fe8eadc94d
commit ae3ec3f920
10 changed files with 66 additions and 47 deletions
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13
ext/misc/carray.c
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@ -19,7 +19,12 @@
** The query above returns 5 integers contained in a C-language array
** at the address $ptr. $ptr is a pointer to the array of integers.
** The pointer value must be assigned to $ptr using the
** sqlite3_bind_pointer() interface.
** sqlite3_bind_pointer() interface with a pointer type of "carray".
** For example:
**
** static int aX[] = { 53, 9, 17, 2231, 4, 99 };
** int i = sqlite3_bind_parameter_index(pStmt, "$ptr");
** sqlite3_bind_value(pStmt, i, aX, "carray");
**
** There is an optional third parameter to determine the datatype of
** the C-language array. Allowed values of the third parameter are
@ -27,6 +32,8 @@
**
** SELECT * FROM carray($ptr,10,'char*');
**
** The default value of the third parameter is 'int32'.
**
** HOW IT WORKS
**
** The carray "function" is really a virtual table with the
@ -233,7 +240,7 @@ static int carrayFilter(
){
carray_cursor *pCur = (carray_cursor *)pVtabCursor;
if( idxNum ){
pCur->pPtr = sqlite3_value_pointer(argv[0]);
pCur->pPtr = sqlite3_value_pointer(argv[0], "carray");
pCur->iCnt = pCur->pPtr ? sqlite3_value_int64(argv[1]) : 0;
if( idxNum<3 ){
pCur->eType = CARRAY_INT32;
@ -370,7 +377,7 @@ static void inttoptrFunc(
int i32 = i64 & 0xffffffff;
memcpy(&p, &i32, sizeof(p));
}
sqlite3_result_pointer(context, p);
sqlite3_result_pointer(context, p, "carray");
}
#endif /* SQLITE_TEST */