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Add APIs to build a Uint8Array from binary data directly

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This commit is contained in:
Saúl Ibarra Corretgé 2023-11-24 17:33:12 +01:00
parent 268cde8270
commit 8f2993bd68
2 changed files with 44 additions and 0 deletions
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40
quickjs.c
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@ -49807,6 +49807,46 @@ static const JSCFunctionListEntry js_dataview_proto_funcs[] = {
JS_PROP_STRING_DEF("[Symbol.toStringTag]", "DataView", JS_PROP_CONFIGURABLE ),
};
static JSValue js_new_uint8array(JSContext *ctx, JSValue buffer)
{
if (JS_IsException(buffer))
return JS_EXCEPTION;
JSValue obj = js_create_from_ctor(ctx, JS_UNDEFINED, JS_CLASS_UINT8_ARRAY);
if (JS_IsException(obj)) {
JS_FreeValue(ctx, buffer);
return JS_EXCEPTION;
}
JSArrayBuffer *abuf = JS_GetOpaque(buffer, JS_CLASS_ARRAY_BUFFER);
assert(abuf != NULL);
if (typed_array_init(ctx, obj, buffer, 0, abuf->byte_length)) {
// 'buffer' is freed on error above.
JS_FreeValue(ctx, obj);
return JS_EXCEPTION;
}
return obj;
}
JSValue JS_NewUint8Array(JSContext *ctx, uint8_t *buf, size_t len,
JSFreeArrayBufferDataFunc *free_func, void *opaque,
JS_BOOL is_shared)
{
JSValue buffer = js_array_buffer_constructor3(ctx, JS_UNDEFINED, len,
is_shared ? JS_CLASS_SHARED_ARRAY_BUFFER : JS_CLASS_ARRAY_BUFFER,
buf, free_func, opaque, FALSE);
return js_new_uint8array(ctx, buffer);
}
JSValue JS_NewUint8ArrayCopy(JSContext *ctx, const uint8_t *buf, size_t len)
{
JSValue buffer = js_array_buffer_constructor3(ctx, JS_UNDEFINED, len,
JS_CLASS_ARRAY_BUFFER,
(uint8_t *)buf,
js_array_buffer_free, NULL,
TRUE);
return js_new_uint8array(ctx, buffer);
}
/* Atomics */
#ifdef CONFIG_ATOMICS

4
quickjs.h
View file

@ -779,6 +779,10 @@ JSValue JS_GetTypedArrayBuffer(JSContext *ctx, JSValueConst obj,
size_t *pbyte_offset,
size_t *pbyte_length,
size_t *pbytes_per_element);
JSValue JS_NewUint8Array(JSContext *ctx, uint8_t *buf, size_t len,
JSFreeArrayBufferDataFunc *free_func, void *opaque,
JS_BOOL is_shared);
JSValue JS_NewUint8ArrayCopy(JSContext *ctx, const uint8_t *buf, size_t len);
typedef struct {
void *(*sab_alloc)(void *opaque, size_t size);
void (*sab_free)(void *opaque, void *ptr);