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Expose sqlite3_preupdate_hook() and friends to the JS API.

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FossilOrigin-Name: cc02783a1210a083683320fae1ec1519e45b8e3003a9e32809d808513a2ce06b
This commit is contained in:
stephan
2022-12-27 14:34:32 +00:00
parent 4e013284a0
commit 294968e030
6 changed files with 137 additions and 24 deletions
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32
ext/wasm/api/sqlite3-api-prologue.js
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@ -139,7 +139,7 @@ self.sqlite3ApiBootstrap = function sqlite3ApiBootstrap(
main thread (aborts via a failed assert() if it's attempted),
which eliminates any(?) benefit to supporting it. */ false;
/**
/**
The main sqlite3 binding API gets installed into this object,
mimicking the C API as closely as we can. The numerous members
names with prefixes 'sqlite3_' and 'SQLITE_' behave, insofar as
@ -1779,6 +1779,36 @@ self.sqlite3ApiBootstrap = function sqlite3ApiBootstrap(
return (0===v) ? undefined : capi.sqlite3_value_to_js(v, throwIfCannotConvert);
};
/**
Internal impl of sqlite3_preupdate_new_js() and
sqlite3_preupdate_old_js().
*/
const __preupdateNewOld = function(pDb, iCol, impl){
impl = capi[impl];
if(!this.ptr) this.ptr = wasm.allocPtr();
else wasm.pokePtr(this.ptr, 0);
const rc = impl(pDb, iCol, this.ptr);
return rc
? SQLite3Error.toss(rc,arguments[2]+"() failed with code "+rc)
: capi.sqlite3_value_to_js( wasm.peekPtr(this.ptr), true );
}.bind(Object.create(null));
/**
A wrapper around sqlite3_preupdate_new() which fetches the
sqlite3_value at the given index and returns the result of
passing it to sqlite3_value_to_js(). Throws on error.
*/
capi.sqlite3_preupdate_new_js =
(pDb, iCol)=>__preupdateNewOld(pDb, iCol, 'sqlite3_preupdate_new');
/**
A wrapper around sqlite3_preupdate_old() which fetches the
sqlite3_value at the given index and returns the result of
passing it to sqlite3_value_to_js(). Throws on error.
*/
capi.sqlite3_preupdate_old_js =
(pDb, iCol)=>__preupdateNewOld(pDb, iCol, 'sqlite3_preupdate_old');
/* The remainder of the API will be set up in later steps. */
const sqlite3 = {
WasmAllocError: WasmAllocError,