| 106 | |
| 107 | // convert array to string |
| 108 | var buf2string = function (buf) { |
| 109 | var i, out, c, c_len; |
| 110 | var len = buf.length; |
| 111 | |
| 112 | // Reserve max possible length (2 words per char) |
| 113 | // NB: by unknown reasons, Array is significantly faster for |
| 114 | // String.fromCharCode.apply than Uint16Array. |
| 115 | var utf16buf = new Array(len*2); |
| 116 | |
| 117 | for (out=0, i=0; i<len;) { |
| 118 | c = buf[i++]; |
| 119 | // quick process ascii |
| 120 | if (c < 0x80) { utf16buf[out++] = c; continue; } |
| 121 | |
| 122 | c_len = _utf8len[c]; |
| 123 | // skip 5 & 6 byte codes |
| 124 | if (c_len > 4) { utf16buf[out++] = 0xfffd; i += c_len-1; continue; } |
| 125 | |
| 126 | // apply mask on first byte |
| 127 | c &= c_len === 2 ? 0x1f : c_len === 3 ? 0x0f : 0x07; |
| 128 | // join the rest |
| 129 | while (c_len > 1 && i < len) { |
| 130 | c = (c << 6) | (buf[i++] & 0x3f); |
| 131 | c_len--; |
| 132 | } |
| 133 | |
| 134 | // terminated by end of string? |
| 135 | if (c_len > 1) { utf16buf[out++] = 0xfffd; continue; } |
| 136 | |
| 137 | if (c < 0x10000) { |
| 138 | utf16buf[out++] = c; |
| 139 | } else { |
| 140 | c -= 0x10000; |
| 141 | utf16buf[out++] = 0xd800 | ((c >> 10) & 0x3ff); |
| 142 | utf16buf[out++] = 0xdc00 | (c & 0x3ff); |
| 143 | } |
| 144 | } |
| 145 | |
| 146 | // shrinkBuf(utf16buf, out) |
| 147 | if (utf16buf.length !== out) { |
| 148 | if(utf16buf.subarray) { |
| 149 | utf16buf = utf16buf.subarray(0, out); |
| 150 | } else { |
| 151 | utf16buf.length = out; |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | // return String.fromCharCode.apply(null, utf16buf); |
| 156 | return utils.applyFromCharCode(utf16buf); |
| 157 | }; |
| 158 | |
| 159 | |
| 160 | // That's all for the pako functions. |