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Expose sqlite3_value_frombind/nochange/numeric_type() to WASM. Add a flag to sqlite3_value_to_js() to cause it to return undefined, instead of throwing, if no conversion can be found.

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FossilOrigin-Name: de8fc4bf34f80f320012a0e506ed8e3e24806daf67845d5dabb00b916108f6ef
This commit is contained in:
stephan
2022-12-09 15:12:07 +00:00
parent 99f30f1cd4
commit 706780fbd9
4 changed files with 36 additions and 14 deletions
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31
ext/wasm/api/sqlite3-api-prologue.js
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@ -1025,7 +1025,10 @@ self.sqlite3ApiBootstrap = function sqlite3ApiBootstrap(
["sqlite3_value_blob", "*", "sqlite3_value*"],
["sqlite3_value_bytes","int", "sqlite3_value*"],
["sqlite3_value_double","f64", "sqlite3_value*"],
["sqlite3_value_frombind", "int", "sqlite3_value*"],
["sqlite3_value_int","int", "sqlite3_value*"],
["sqlite3_value_nochange", "int", "sqlite3_value*"],
["sqlite3_value_numeric_type", "int", "sqlite3_value*"],
["sqlite3_value_pointer", "*", "sqlite3_value*", "string:static"],
["sqlite3_value_text", "string", "sqlite3_value*"],
["sqlite3_value_type", "int", "sqlite3_value*"],
@ -1661,10 +1664,24 @@ self.sqlite3ApiBootstrap = function sqlite3ApiBootstrap(
/**
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.
return it.
By default it throws if it cannot determine any sensible
conversion. If passed a falsy second argument, it instead returns
`undefined` if no suitable conversion is found. Note that there
is no conversion from SQL to JS which results in the `undefined`
value, so `undefined` has an unambiguous meaning here.
Caveats:
- It does not support sqlite3_value_to_pointer() conversions
because those require a type name string which this function
does not have and cannot sensibly be given at the level of the
API where this is used (e.g. automatically converting UDF
arguments). Clients using sqlite3_value_to_pointer(), and its
related APIs, will need to manage those themselves.
*/
capi.sqlite3_value_to_js = function(pVal){
capi.sqlite3_value_to_js = function(pVal,throwIfCannotConvert=true){
let arg;
const valType = capi.sqlite3_value_type(pVal);
switch(valType){
@ -1693,9 +1710,11 @@ self.sqlite3ApiBootstrap = function sqlite3ApiBootstrap(
case capi.SQLITE_NULL:
arg = null; break;
default:
toss3("Unhandled sqlite3_value_type()",valType,
"is possibly indicative of incorrect",
"pointer size assumption.");
if(throwIfCannotConvert){
toss3(capi.SQLITE_MISMATCH,
"Unhandled sqlite3_value_type():",valType);
}
arg = undefined;
}
return arg;
};