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<? |
<?php |
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function str_length(string $str) : string |
function str_length(string $str) : int |
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{ |
{ |
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$len = strlen($str); |
$len = strlen($str); |
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$ret = 0; |
$ret = 0; |
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|
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// Process UTF-8 Chinese characters |
// Process UTF-8 Chinese characters |
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$v1 = ord($c); |
$v1 = ord($c); |
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if (($v1 & 0b10000000) == 0b10000000) //head of multi-byte character |
if ($v1 & 0b10000000) //head of multi-byte character |
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{ |
{ |
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$v2 = ($v1 & 0b01111000) << 1; |
$v2 = ($v1 & 0b01110000) << 1; |
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while ($v2 & 0b10000000) |
while ($v2 & 0b10000000) |
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{ |
{ |
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$i++; |
$i++; |
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$v3 = $str[$i]; |
$c .= $str[$i]; |
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$c .= $v3; |
$v2 = ($v2 & 0b01111111) << 1; |
|
$v2 = ($v2 & 0b01111111 ) << 1; |
|
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} |
} |
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|
|
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$ret += 2; |
$ret += 2; |
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{ |
{ |
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return $str; |
return $str; |
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} |
} |
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|
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$result = ""; |
$result = ""; |
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$len = strlen($str); |
$len = strlen($str); |
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$prefix_len = str_length($prefix); |
$prefix_len = str_length($prefix); |
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{ |
{ |
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continue; |
continue; |
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} |
} |
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|
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if ($c == "\n") |
if ($c == "\n") |
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{ |
{ |
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if ($lines_count + 1 >= $lines_limit) |
if ($lines_count + 1 >= $lines_limit) |
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|
|
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// Process UTF-8 Chinese characters |
// Process UTF-8 Chinese characters |
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$v1 = ord($c); |
$v1 = ord($c); |
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if (($v1 & 0b10000000) == 0b10000000) //head of multi-byte character |
if ($v1 & 0b10000000) //head of multi-byte character |
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{ |
{ |
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$v2 = ($v1 & 0b01111000) << 1; |
$v2 = ($v1 & 0b01110000) << 1; |
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while ($v2 & 0b10000000) |
while ($v2 & 0b10000000) |
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{ |
{ |
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$i++; |
$i++; |
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$v3 = $str[$i]; |
$c .= $str[$i]; |
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$c .= $v3; |
$v2 = ($v2 & 0b01111111) << 1; |
|
$v2 = ($v2 & 0b01111111 ) << 1; |
|
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} |
} |
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|
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// Each UTF-8 CJK character should use two character length for display |
// Each UTF-8 CJK character should use two character length for display |
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$line_len++; |
$line_len++; |
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} |
} |
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|
|
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$line .= $c; |
if ($line_len > $width) |
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|
|
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if ($line_len >= $width) |
|
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{ |
{ |
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if ($lines_count + 1 >= $lines_limit) |
if ($lines_count + 1 >= $lines_limit) |
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{ |
{ |
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$result .= ($line . $end_of_line); |
$result .= ($line . $end_of_line); |
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$lines_count++; |
$lines_count++; |
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$line = $prefix; |
$line = $prefix; |
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$line_len = $prefix_len; |
$line_len = $prefix_len + 1; |
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} |
} |
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$line .= $c; |
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} |
} |
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|
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if ($lines_count < $lines_limit) |
if ($lines_count < $lines_limit) |
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return $result; |
return $result; |
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} |
} |
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?> |
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