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authorGravatar Piotr Russ <mail@pruss.it> 2020-11-16 00:10:28 +0100
committerGravatar Piotr Russ <mail@pruss.it> 2020-11-16 00:10:28 +0100
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Diffstat (limited to 'node_modules/@webassemblyjs/utf8/src/encoder.js')
-rw-r--r--node_modules/@webassemblyjs/utf8/src/encoder.js44
1 files changed, 44 insertions, 0 deletions
diff --git a/node_modules/@webassemblyjs/utf8/src/encoder.js b/node_modules/@webassemblyjs/utf8/src/encoder.js
new file mode 100644
index 0000000..1c482f0
--- /dev/null
+++ b/node_modules/@webassemblyjs/utf8/src/encoder.js
@@ -0,0 +1,44 @@
+function con(n) {
+ return 0x80 | (n & 0x3f);
+}
+
+export function encode(str) {
+ const arr = str.split("").map(x => x.charCodeAt(0));
+ return _encode(arr);
+}
+
+function _encode(arr) {
+ if (arr.length === 0) {
+ return [];
+ }
+
+ const [n, ...ns] = arr;
+
+ if (n < 0) {
+ throw new Error("utf8");
+ }
+
+ if (n < 0x80) {
+ return [n, ..._encode(ns)];
+ }
+
+ if (n < 0x800) {
+ return [0xc0 | (n >>> 6), con(n), ..._encode(ns)];
+ }
+
+ if (n < 0x10000) {
+ return [0xe0 | (n >>> 12), con(n >>> 6), con(n), ..._encode(ns)];
+ }
+
+ if (n < 0x110000) {
+ return [
+ 0xf0 | (n >>> 18),
+ con(n >>> 12),
+ con(n >>> 6),
+ con(n),
+ ..._encode(ns)
+ ];
+ }
+
+ throw new Error("utf8");
+}