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Add typed array utility functions

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Richard Davison 2024-12-22 16:35:10 +01:00 committed by GitHub
parent be2db73000
commit 7f156b6ef9
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GPG key ID: B5690EEEBB952194
2 changed files with 37 additions and 3 deletions
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19
quickjs.c
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@ -52449,6 +52449,16 @@ static JSValue js_typed_array_get_byteOffset(JSContext *ctx, JSValue this_val)
return js_uint32(ta->offset); return js_uint32(ta->offset);
} }
JSValue JS_NewTypedArray(JSContext *ctx, int argc, JSValue *argv,
JSTypedArrayEnum type)
{
if (type < JS_TYPED_ARRAY_UINT8C || type > JS_TYPED_ARRAY_FLOAT64)
return JS_ThrowRangeError(ctx, "invalid typed array type");
return js_typed_array_constructor(ctx, JS_UNDEFINED, argc, argv,
JS_CLASS_UINT8C_ARRAY + type);
}
/* Return the buffer associated to the typed array or an exception if /* Return the buffer associated to the typed array or an exception if
it is not a typed array or if the buffer is detached. pbyte_offset, it is not a typed array or if the buffer is detached. pbyte_offset,
pbyte_length or pbytes_per_element can be NULL. */ pbyte_length or pbytes_per_element can be NULL. */
@ -54756,8 +54766,13 @@ JSValue JS_NewUint8ArrayCopy(JSContext *ctx, const uint8_t *buf, size_t len)
return js_new_uint8array(ctx, buffer); return js_new_uint8array(ctx, buffer);
} }
JS_BOOL JS_IsUint8Array(JSValue obj) { int JS_GetTypedArrayType(JSValue obj)
return JS_GetClassID(obj) == JS_CLASS_UINT8_ARRAY; {
JSClassID class_id = JS_GetClassID(obj);
if (class_id >= JS_CLASS_UINT8C_ARRAY && class_id <= JS_CLASS_FLOAT64_ARRAY)
return class_id - JS_CLASS_UINT8C_ARRAY;
else
return -1;
} }
/* Atomics */ /* Atomics */

21
quickjs.h
View file

@ -775,6 +775,24 @@ JS_EXTERN void JS_DetachArrayBuffer(JSContext *ctx, JSValue obj);
JS_EXTERN uint8_t *JS_GetArrayBuffer(JSContext *ctx, size_t *psize, JSValue obj); JS_EXTERN uint8_t *JS_GetArrayBuffer(JSContext *ctx, size_t *psize, JSValue obj);
JS_EXTERN JS_BOOL JS_IsArrayBuffer(JSValue obj); JS_EXTERN JS_BOOL JS_IsArrayBuffer(JSValue obj);
JS_EXTERN uint8_t *JS_GetUint8Array(JSContext *ctx, size_t *psize, JSValue obj); JS_EXTERN uint8_t *JS_GetUint8Array(JSContext *ctx, size_t *psize, JSValue obj);
typedef enum JSTypedArrayEnum {
JS_TYPED_ARRAY_UINT8C = 0,
JS_TYPED_ARRAY_INT8,
JS_TYPED_ARRAY_UINT8,
JS_TYPED_ARRAY_INT16,
JS_TYPED_ARRAY_UINT16,
JS_TYPED_ARRAY_INT32,
JS_TYPED_ARRAY_UINT32,
JS_TYPED_ARRAY_BIG_INT64,
JS_TYPED_ARRAY_BIG_UINT64,
JS_TYPED_ARRAY_FLOAT16,
JS_TYPED_ARRAY_FLOAT32,
JS_TYPED_ARRAY_FLOAT64,
} JSTypedArrayEnum;
JS_EXTERN JSValue JS_NewTypedArray(JSContext *ctx, int argc, JSValue *argv,
JSTypedArrayEnum array_type);
JS_EXTERN JSValue JS_GetTypedArrayBuffer(JSContext *ctx, JSValue obj, JS_EXTERN JSValue JS_GetTypedArrayBuffer(JSContext *ctx, JSValue obj,
size_t *pbyte_offset, size_t *pbyte_offset,
size_t *pbyte_length, size_t *pbyte_length,
@ -782,7 +800,8 @@ JS_EXTERN JSValue JS_GetTypedArrayBuffer(JSContext *ctx, JSValue obj,
JS_EXTERN JSValue JS_NewUint8Array(JSContext *ctx, uint8_t *buf, size_t len, JS_EXTERN JSValue JS_NewUint8Array(JSContext *ctx, uint8_t *buf, size_t len,
JSFreeArrayBufferDataFunc *free_func, void *opaque, JSFreeArrayBufferDataFunc *free_func, void *opaque,
JS_BOOL is_shared); JS_BOOL is_shared);
JS_EXTERN JS_BOOL JS_IsUint8Array(JSValue obj); /* returns -1 if not a typed array otherwise return a JSTypedArrayEnum value */
JS_EXTERN int JS_GetTypedArrayType(JSValue obj);
JS_EXTERN JSValue JS_NewUint8ArrayCopy(JSContext *ctx, const uint8_t *buf, size_t len); JS_EXTERN JSValue JS_NewUint8ArrayCopy(JSContext *ctx, const uint8_t *buf, size_t len);
typedef struct { typedef struct {
void *(*sab_alloc)(void *opaque, size_t size); void *(*sab_alloc)(void *opaque, size_t size);