summaryrefslogtreecommitdiff
path: root/node_modules/capnp-ts/src/constants.js
diff options
context:
space:
mode:
authorakiyamn2023-09-24 23:22:21 +1000
committerakiyamn2023-09-24 23:22:21 +1000
commit4e87195739f2a5d9a05451b48773c8afdc680765 (patch)
tree9cba501844a4a11dcbdffc4050ed8189561c55ed /node_modules/capnp-ts/src/constants.js
downloadprice-tracker-worker-4e87195739f2a5d9a05451b48773c8afdc680765.tar.gz
price-tracker-worker-4e87195739f2a5d9a05451b48773c8afdc680765.zip
Initial commit (by create-cloudflare CLI)
Diffstat (limited to 'node_modules/capnp-ts/src/constants.js')
-rw-r--r--node_modules/capnp-ts/src/constants.js82
1 files changed, 82 insertions, 0 deletions
diff --git a/node_modules/capnp-ts/src/constants.js b/node_modules/capnp-ts/src/constants.js
new file mode 100644
index 0000000..90e168b
--- /dev/null
+++ b/node_modules/capnp-ts/src/constants.js
@@ -0,0 +1,82 @@
+"use strict";
+/**
+ * @author jdiaz5513
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.MAX_SEGMENT_LENGTH = exports.MAX_DEPTH = exports.VAL32 = exports.POINTER_TYPE_MASK = exports.POINTER_DOUBLE_FAR_MASK = exports.POINTER_COPY_LIMIT = exports.PACK_SPAN_THRESHOLD = exports.NATIVE_LITTLE_ENDIAN = exports.MIN_SINGLE_SEGMENT_GROWTH = exports.MIN_SAFE_INTEGER = exports.MAX_STREAM_SEGMENTS = exports.MAX_SAFE_INTEGER = exports.MAX_UINT32 = exports.MAX_INT32 = exports.MAX_BUFFER_DUMP_BYTES = exports.LIST_SIZE_MASK = exports.GROWTH_FACTOR = exports.DEFAULT_TRAVERSE_LIMIT = exports.DEFAULT_DEPTH_LIMIT = exports.DEFAULT_DECODE_LIMIT = exports.DEFAULT_BUFFER_SIZE = void 0;
+// Perform some bit gymnastics to determine the native endian format.
+const tmpWord = new DataView(new ArrayBuffer(8));
+new Uint16Array(tmpWord.buffer)[0] = 0x0102;
+/** Default size (in bytes) for newly allocated segments. */
+exports.DEFAULT_BUFFER_SIZE = 4096;
+exports.DEFAULT_DECODE_LIMIT = 64 << 20; // 64 MiB
+/**
+ * Limit to how deeply nested pointers are allowed to be. The root struct of a message will start at this value, and it
+ * is decremented as pointers are dereferenced.
+ */
+exports.DEFAULT_DEPTH_LIMIT = 64;
+/**
+ * Limit to the number of **bytes** that can be traversed in a single message. This is necessary to prevent certain
+ * classes of DoS attacks where maliciously crafted data can be self-referencing in a way that wouldn't trigger the
+ * depth limit.
+ *
+ * For this reason, it is advised to cache pointers into variables and not constantly dereference them since the
+ * message's traversal limit gets decremented each time.
+ */
+exports.DEFAULT_TRAVERSE_LIMIT = 64 << 20; // 64 MiB
+/**
+ * When allocating array buffers dynamically (while packing or in certain Arena implementations) the previous buffer's
+ * size is multiplied by this number to determine the next buffer's size. This is chosen to keep both time spent
+ * reallocating and wasted memory to a minimum.
+ *
+ * Smaller numbers would save memory at the expense of CPU time.
+ */
+exports.GROWTH_FACTOR = 1.5;
+/** A bitmask applied to obtain the size of a list pointer. */
+exports.LIST_SIZE_MASK = 0x00000007;
+/** Maximum number of bytes to dump at once when dumping array buffers to string. */
+exports.MAX_BUFFER_DUMP_BYTES = 8192;
+/** The maximum value for a 32-bit integer. */
+exports.MAX_INT32 = 0x7fffffff;
+/** The maximum value for a 32-bit unsigned integer. */
+exports.MAX_UINT32 = 0xffffffff;
+/** The largest integer that can be precisely represented in JavaScript. */
+exports.MAX_SAFE_INTEGER = 9007199254740991;
+/** Maximum limit on the number of segments in a message stream. */
+exports.MAX_STREAM_SEGMENTS = 512;
+/** The smallest integer that can be precisely represented in JavaScript. */
+exports.MIN_SAFE_INTEGER = -9007199254740991;
+/** Minimum growth increment for a SingleSegmentArena. */
+exports.MIN_SINGLE_SEGMENT_GROWTH = 4096;
+/**
+ * This will be `true` if the machine running this code stores numbers natively in little-endian format. This is useful
+ * for some numeric type conversions when the endianness does not affect the output. Using the native endianness for
+ * these operations is _slightly_ faster.
+ */
+exports.NATIVE_LITTLE_ENDIAN = tmpWord.getUint8(0) === 0x02;
+/**
+ * When packing a message, this is the number of zero bytes required after a SPAN (0xff) tag is written to the packed
+ * message before the span is terminated.
+ *
+ * This little detail is left up to the implementation because it can be tuned for performance. Setting this to a higher
+ * value may help with messages that contain a ton of text/data.
+ *
+ * It is imperative to never set this below 1 or else BAD THINGS. You have been warned.
+ */
+exports.PACK_SPAN_THRESHOLD = 2;
+/**
+ * How far to travel into a nested pointer structure during a deep copy; when this limit is exhausted the copy
+ * operation will throw an error.
+ */
+exports.POINTER_COPY_LIMIT = 32;
+/** A bitmask for looking up the double-far flag on a far pointer. */
+exports.POINTER_DOUBLE_FAR_MASK = 0x00000004;
+/** A bitmask for looking up the pointer type. */
+exports.POINTER_TYPE_MASK = 0x00000003;
+/** Used for some 64-bit conversions, equal to Math.pow(2, 32). */
+exports.VAL32 = 0x100000000;
+/** The maximum value allowed for depth traversal limits. */
+exports.MAX_DEPTH = exports.MAX_INT32;
+/** The maximum byte length for a single segment. */
+exports.MAX_SEGMENT_LENGTH = exports.MAX_UINT32;
+//# sourceMappingURL=constants.js.map \ No newline at end of file