feat: utf8

docs/guide/bkon.md

@@ -14,7 +14,7 @@ A compact binary representation similar to JSON objects. This documentation uses
 ```cpp
 struct String {
   uint32 length;
-  ascii[length] value;
+  utf8[length] value;
 }
 ```
 

src/core/streams/bkon.ts

@@ -44,7 +44,7 @@ export class BkonReadStream extends ReadStream {
   }
 
   magic() {
-    const magic = this.ascii(4);
+    const magic = this.utf8(4);
 
     if (magic !== 'BKON') {
       throw new Error(`Invalid Bkon magic number: "${magic}"`);
@@ -100,7 +100,7 @@ export class BkonReadStream extends ReadStream {
 
   string() {
     const length = this.uint32();
-    const string = this.ascii(length);
+    const string = this.utf8(length);
     return string;
   }
 
@@ -332,11 +332,11 @@ export class BkonWriteStream extends WriteStream {
   }
 
   string(value: string) {
-    this.uint32(value.length);
-    this.ascii(value);
+    this.uint32(Buffer.byteLength(value));
+    this.utf8(value);
   }
 
   magic() {
-    this.ascii('BKON');
+    this.utf8('BKON');
   }
 }

src/core/streams/buffer.ts

@@ -35,6 +35,9 @@ export class ReadStream {
   ascii(size: number) {
     return this.buffer.toString('ascii', this.increment(size), this.index);
   }
+  utf8(size: number) {
+    return this.buffer.toString('utf8', this.increment(size), this.index);
+  }
 
   int8() {
     return this.buffer.readInt8(this.increment(1));
@@ -94,6 +97,16 @@ export class WriteStream {
     }
     return this;
   }
+  utf8(value: string) {
+    const buffer = Buffer.alloc(Buffer.byteLength(value));
+
+    buffer.write(value, 'utf8');
+    buffer.forEach((value) => {
+      this.array.push(value);
+    });
+
+    return this;
+  }
 
   private uintN(bytes: number, value: number) {
     for (let index = 0; index < bytes; index++) {