diff options
Diffstat (limited to 'node_modules/@webassemblyjs/utf8/src/decoder.js')
| -rw-r--r-- | node_modules/@webassemblyjs/utf8/src/decoder.js | 67 |
1 files changed, 0 insertions, 67 deletions
diff --git a/node_modules/@webassemblyjs/utf8/src/decoder.js b/node_modules/@webassemblyjs/utf8/src/decoder.js deleted file mode 100644 index de80d125..00000000 --- a/node_modules/@webassemblyjs/utf8/src/decoder.js +++ /dev/null @@ -1,67 +0,0 @@ -function con(b) { - if ((b & 0xc0) === 0x80) { - return b & 0x3f; - } else { - throw new Error("invalid UTF-8 encoding"); - } -} - -function code(min, n) { - if (n < min || (0xd800 <= n && n < 0xe000) || n >= 0x10000) { - throw new Error("invalid UTF-8 encoding"); - } else { - return n; - } -} - -export function decode(bytes) { - return _decode(bytes) - .map((x) => String.fromCharCode(x)) - .join(""); -} - -function _decode(bytes) { - const result = []; - while (bytes.length > 0) { - const b1 = bytes[0]; - if (b1 < 0x80) { - result.push(code(0x0, b1)); - bytes = bytes.slice(1); - continue; - } - - if (b1 < 0xc0) { - throw new Error("invalid UTF-8 encoding"); - } - - const b2 = bytes[1]; - if (b1 < 0xe0) { - result.push(code(0x80, ((b1 & 0x1f) << 6) + con(b2))); - bytes = bytes.slice(2); - continue; - } - - const b3 = bytes[2]; - if (b1 < 0xf0) { - result.push(code(0x800, ((b1 & 0x0f) << 12) + (con(b2) << 6) + con(b3))); - bytes = bytes.slice(3); - continue; - } - - const b4 = bytes[3]; - if (b1 < 0xf8) { - result.push( - code( - 0x10000, - ((((b1 & 0x07) << 18) + con(b2)) << 12) + (con(b3) << 6) + con(b4) - ) - ); - bytes = bytes.slice(4); - continue; - } - - throw new Error("invalid UTF-8 encoding"); - } - - return result; -} |
