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annotate goodreads/UTFUtil.php @ 6:077b0a0a3e6d

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remaining originals according to dependency walk
author Robert Boland <robert@markup.co.uk>
date Thu, 16 Feb 2017 22:29:02 +0000
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Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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6
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1 <?PHP
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2 function convert_utf8($str){
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3 if(!seems_utf8($str))
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4 return mb_convert_encoding($str, 'UTF-8');
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5 return $str;
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6 }
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7
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8 function seems_utf8($Str) {
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9 for ($i=0; $i<strlen($Str); $i++) {
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10 if (ord($Str[$i]) < 0x80) continue; # 0bbbbbbb
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11 elseif ((ord($Str[$i]) & 0xE0) == 0xC0) $n=1; # 110bbbbb
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12 elseif ((ord($Str[$i]) & 0xF0) == 0xE0) $n=2; # 1110bbbb
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13 elseif ((ord($Str[$i]) & 0xF8) == 0xF0) $n=3; # 11110bbb
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14 elseif ((ord($Str[$i]) & 0xFC) == 0xF8) $n=4; # 111110bb
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15 elseif ((ord($Str[$i]) & 0xFE) == 0xFC) $n=5; # 1111110b
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16 else return false; # Does not match any model
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17 for ($j=0; $j<$n; $j++) { # n bytes matching 10bbbbbb follow ?
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18 if ((++$i == strlen($Str)) || ((ord($Str[$i]) & 0xC0) != 0x80))
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19 return false;
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20 }
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21 }
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22 return true;
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23 }
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24 ?>