--- fenglin/lib/str_process.inc.php	2025/03/01 09:02:28	1.9
+++ fenglin/lib/str_process.inc.php	2025/10/30 11:19:14	1.22
@@ -1,64 +1,127 @@
-<?
+<?php
+function str_length(string $str) : int
+{
+	$len = strlen($str);
+	$ret = 0;
+
+	for ($i = 0; $i < $len; $i++)
+	{
+		$c = $str[$i];
+
+		// Process UTF-8 Chinese characters
+		$v1 = ord($c);
+		if ($v1 & 0x80) //head of multi-byte character
+		{
+			$v2 = ($v1 & 0x70) << 1;
+			while ($v2 & 0x80)
+			{
+				$i++;
+				$c .= $str[$i];
+				$v2 = ($v2 & 0x7f) << 1;
+			}
+
+			$ret += 2;
+		}
+		else
+		{
+			$ret++;
+		}
+	}
 
-function split_line($str,$prefix="",$width=76)
+	return $ret;
+}
+
+function split_line(string $str, string $prefix = "", int $width = PHP_INT_MAX, int $lines_limit = PHP_INT_MAX, string $end_of_line = "\n") : string
 {
-	if ($width<=0)
-		return $str;
-	
+	if ($width <= 0)
+	{
+		$width = PHP_INT_MAX;
+	}
+
 	$result = "";
-	$len = mb_strlen($str,'UTF-8');
-	$prefix_len = mb_strlen($prefix,'UTF-8');
+	$len = strlen($str);
+	$prefix_len = str_length($prefix);
+
+	$lines_count = 0;
 
 	$line = $prefix;
 	$line_len = $prefix_len;
-	for($i=0;$i<$len;$i++)
+	for ($i = 0; $i < $len && $lines_count < $lines_limit; $i++)
 	{
-		$c = mb_substr($str,$i,1,'UTF-8');
-		$line.=$c;
+		$c = $str[$i];
 
-		// Each UTF-8 CJK character should use two character length for display
-		$line_len += (strlen($c) <= 2 ? 1 : 2);
+		// Skip special characters
+		if ($c == "\r" || $c == "\7")
+		{
+			continue;
+		}
 
-		if ($line_len >= $width)
+		if ($c == "\n")
 		{
-			$result .= ($line . "\n");
+			if ($lines_count + 1 >= $lines_limit)
+			{
+				break;
+			}
+
+			$result .= ($line . $end_of_line);
+			$lines_count++;
 			$line = $prefix;
 			$line_len = $prefix_len;
+			continue;
 		}
-	}
-	$result .= ($line . "\n");
 
-	return $result;
-}
+		// Process UTF-8 Chinese characters
+		$v1 = ord($c);
+		if ($v1 & 0x80) //head of multi-byte character
+		{
+			$v2 = ($v1 & 0x70) << 1;
+			while ($v2 & 0x80)
+			{
+				$i++;
+				$c .= $str[$i];
+				$v2 = ($v2 & 0x7f) << 1;
+			}
+
+			// Each UTF-8 CJK character should use two character length for display
+			if ($line_len + 2 > $width)
+			{
+				if ($lines_count + 1 >= $lines_limit)
+				{
+					break;
+				}
+
+				$result .= ($line . $end_of_line);
+				$lines_count++;
+				$line = $prefix;
+				$line_len = $prefix_len;
+			}
+			$line_len += 2;
+		}
+		else
+		{
+			$line_len++;
+		}
 
-function str_process($str,$prefix="",$width=76)
-{
-	$result = "";
-	
-	$lines = explode("\n",str_replace("\r\n","\n",$str));
+		if ($line_len > $width)
+		{
+			if ($lines_count + 1 >= $lines_limit)
+			{
+				break;
+			}
 
-	foreach($lines as $tmp => $line)
-	{
-		$result .= split_line($line,$prefix,$width);
+			$result .= ($line . $end_of_line);
+			$lines_count++;
+			$line = $prefix;
+			$line_len = $prefix_len + 1;
+		}
+
+		$line .= $c;
 	}
-	
-	return $result;
-}
 
-function str_b_lines($str,$max_line=1)
-{
-	$result = "";
-	$l = 0;
-	$lines = explode("\n",str_replace("\r\n","\n",$str));
-	foreach($lines as $tmp => $line)
+	if ($lines_count < $lines_limit)
 	{
-		$result .= ($line."\n");
-		$l += (mb_strlen($line,'UTF-8')/128 + 1);
-		if ($l >= $max_line)
-			break;
+		$result .= $line;
 	}
 
 	return $result;
 }
-
-?>