diff options
Diffstat (limited to 'src/lobject.js')
| -rw-r--r-- | src/lobject.js | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/src/lobject.js b/src/lobject.js index 739db50..556da08 100644 --- a/src/lobject.js +++ b/src/lobject.js @@ -111,7 +111,44 @@ class TValue { } jsstring() { - return this.ttisstring() ? String.fromCharCode(...this.value) : null; + //return this.ttisstring() ? String.fromCharCode(...this.value) : null; + let u0, u1, u2, u3, u4, u5; + let idx = 0; + + var str = ''; + while (1) { + // For UTF8 byte structure, see http://en.wikipedia.org/wiki/UTF-8#Description and https://www.ietf.org/rfc/rfc2279.txt and https://tools.ietf.org/html/rfc3629 + u0 = this.value[idx++]; + if (!u0) return str; + if (!(u0 & 0x80)) { str += String.fromCharCode(u0); continue; } + u1 = this.value[idx++] & 63; + if ((u0 & 0xE0) == 0xC0) { str += String.fromCharCode(((u0 & 31) << 6) | u1); continue; } + u2 = this.value[idx++] & 63; + if ((u0 & 0xF0) == 0xE0) { + u0 = ((u0 & 15) << 12) | (u1 << 6) | u2; + } else { + u3 = this.value[idx++] & 63; + if ((u0 & 0xF8) == 0xF0) { + u0 = ((u0 & 7) << 18) | (u1 << 12) | (u2 << 6) | u3; + } else { + u4 = this.value[idx++] & 63; + if ((u0 & 0xFC) == 0xF8) { + u0 = ((u0 & 3) << 24) | (u1 << 18) | (u2 << 12) | (u3 << 6) | u4; + } else { + u5 = this.value[idx++] & 63; + u0 = ((u0 & 1) << 30) | (u1 << 24) | (u2 << 18) | (u3 << 12) | (u4 << 6) | u5; + } + } + } + if (u0 < 0x10000) { + str += String.fromCharCode(u0); + } else { + var ch = u0 - 0x10000; + str += String.fromCharCode(0xD800 | (ch >> 10), 0xDC00 | (ch & 0x3FF)); + } + } + + return str; } } |