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Refactor the sqlite3_value-to-JS conversion from an internal detail to sqlite3.capi.sqlite3_value_to_js() for use with routines like sqlite3_module::xFilter().

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FossilOrigin-Name: f6dbf280f99809a80c99337e4c22a86dea7a35ae41ae9a69144c4502385a0a1f
This commit is contained in:
stephan
2022-12-09 14:46:24 +00:00
parent edfbde52fd
commit 99f30f1cd4
6 changed files with 64 additions and 54 deletions
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42
ext/wasm/api/sqlite3-api-prologue.js
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@ -1658,6 +1658,48 @@ self.sqlite3ApiBootstrap = function sqlite3ApiBootstrap(
}
}.bind(Object.create(null));
/**
Given a (sqlite3_value*), this function attempts to convert it
to an equivalent JS value with as much fidelity as feasible and
return it. Throws if it cannot determine any sensible
conversion, but that would be indicative of a serious error.
*/
capi.sqlite3_value_to_js = function(pVal){
let arg;
const valType = capi.sqlite3_value_type(pVal);
switch(valType){
case capi.SQLITE_INTEGER:
if(wasm.bigIntEnabled){
arg = capi.sqlite3_value_int64(pVal);
if(util.bigIntFitsDouble(arg)) arg = Number(arg);
}
else arg = capi.sqlite3_value_double(pVal)/*yes, double, for larger integers*/;
break;
case capi.SQLITE_FLOAT:
arg = capi.sqlite3_value_double(pVal);
break;
case capi.SQLITE_TEXT:
arg = capi.sqlite3_value_text(pVal);
break;
case capi.SQLITE_BLOB:{
const n = capi.sqlite3_value_bytes(pVal);
const pBlob = capi.sqlite3_value_blob(pVal);
if(n && !pBlob) sqlite3.WasmAllocError.toss(
"Cannot allocate memory for blob argument of",n,"byte(s)"
);
arg = n ? wasm.heap8u().slice(pBlob, pBlob + Number(n)) : null;
break;
}
case capi.SQLITE_NULL:
arg = null; break;
default:
toss3("Unhandled sqlite3_value_type()",valType,
"is possibly indicative of incorrect",
"pointer size assumption.");
}
return arg;
};
/* The remainder of the API will be set up in later steps. */
const sqlite3 = {
WasmAllocError: WasmAllocError,