fenglin/lib/str_process.inc.php

<?php
function str_length(string $str, bool $skip_ctrl_seq = false) : int
{
        $len = strlen($str);
        $ret = 0;

        for ($i = 0; $i < $len; $i++)
        {
                $c = $str[$i];

                if ($c == "\r" || $c == "\7") // skip
                {
                        continue;
                }

                if ($skip_ctrl_seq && $c == "\033" && $i + 1 < $len && $str[$i + 1] == "[") // Skip control sequence
                {
                        for ($i = $i + 2; 
                                $i < $len && (ctype_digit($str[$i]) || $str[$i] == ';' || $str[$i] == '?');
                                $i++)
                                ;

                        if ($i < $len && $str[$i] == 'm') // valid
                        {
                                // skip
                        }
                        else if ($i < $len && ctype_alpha($str[$i]))
                        {
                                // unsupported ANSI CSI command
                        }
                        else
                        {
                                $i--;
                        }

                        continue;
                }

                // 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++;
                }
        }

        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)
        {
                $width = PHP_INT_MAX;
        }

        $result = "";
        $len = strlen($str);
        $prefix_len = str_length($prefix);

        $lines_count = 0;

        $line = $prefix;
        $line_len = $prefix_len;
        for ($i = 0; $i < $len && $lines_count < $lines_limit; $i++)
        {
                $c = $str[$i];

                // Skip special characters
                if ($c == "\r" || $c == "\7")
                {
                        continue;
                }

                if ($c == "\n")
                {
                        if ($lines_count + 1 >= $lines_limit)
                        {
                                break;
                        }

                        $result .= ($line . $end_of_line);
                        $lines_count++;
                        $line = $prefix;
                        $line_len = $prefix_len;
                        continue;
                }

                // 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++;
                }

                if ($line_len > $width)
                {
                        if ($lines_count + 1 >= $lines_limit)
                        {
                                break;
                        }

                        $result .= ($line . $end_of_line);
                        $lines_count++;
                        $line = $prefix;
                        $line_len = $prefix_len + 1;
                }

                $line .= $c;
        }

        if ($lines_count < $lines_limit)
        {
                $result .= $line;
        }

        return $result;
}
1	sysadm	1.16	<?php
2	sysadm	1.23	function str_length(string $str, bool $skip_ctrl_seq = false) : int
3	sysadm	1.12	{
4			$len = strlen($str);
5			$ret = 0;
6
7			for ($i = 0; $i < $len; $i++)
8			{
9			$c = $str[$i];
10
11	sysadm	1.23	if ($c == "\r" \|\| $c == "\7") // skip
12			{
13			continue;
14			}
15
16	sysadm	1.24	if ($skip_ctrl_seq && $c == "\033" && $i + 1 < $len && $str[$i + 1] == "[") // Skip control sequence
17	sysadm	1.23	{
18			for ($i = $i + 2;
19	sysadm	1.24	$i < $len && (ctype_digit($str[$i]) \|\| $str[$i] == ';' \|\| $str[$i] == '?');
20	sysadm	1.23	$i++)
21			;
22
23	sysadm	1.24	if ($i < $len && $str[$i] == 'm') // valid
24	sysadm	1.23	{
25			// skip
26			}
27	sysadm	1.24	else if ($i < $len && ctype_alpha($str[$i]))
28	sysadm	1.23	{
29			// unsupported ANSI CSI command
30			}
31			else
32			{
33			$i--;
34			}
35
36			continue;
37			}
38
39	sysadm	1.12	// Process UTF-8 Chinese characters
40			$v1 = ord($c);
41	sysadm	1.21	if ($v1 & 0x80) //head of multi-byte character
42	sysadm	1.12	{
43	sysadm	1.21	$v2 = ($v1 & 0x70) << 1;
44			while ($v2 & 0x80)
45	sysadm	1.12	{
46			$i++;
47	sysadm	1.20	$c .= $str[$i];
48	sysadm	1.21	$v2 = ($v2 & 0x7f) << 1;
49	sysadm	1.12	}
50
51			$ret += 2;
52			}
53			else
54			{
55			$ret++;
56			}
57			}
58
59			return $ret;
60			}
61
62	sysadm	1.22	function split_line(string $str, string $prefix = "", int $width = PHP_INT_MAX, int $lines_limit = PHP_INT_MAX, string $end_of_line = "\n") : string
63	sysadm	1.1	{
64	sysadm	1.10	if ($width <= 0)
65	sysadm	1.14	{
66	sysadm	1.22	$width = PHP_INT_MAX;
67	sysadm	1.14	}
68	sysadm	1.17
69	sysadm	1.9	$result = "";
70	sysadm	1.10	$len = strlen($str);
71	sysadm	1.12	$prefix_len = str_length($prefix);
72	sysadm	1.10
73			$lines_count = 0;
74	sysadm	1.9
75	sysadm	1.4	$line = $prefix;
76	sysadm	1.9	$line_len = $prefix_len;
77	sysadm	1.11	for ($i = 0; $i < $len && $lines_count < $lines_limit; $i++)
78	sysadm	1.1	{
79	sysadm	1.10	$c = $str[$i];
80	sysadm	1.9
81	sysadm	1.10	// Skip special characters
82			if ($c == "\r" \|\| $c == "\7")
83			{
84			continue;
85			}
86	sysadm	1.17
87	sysadm	1.10	if ($c == "\n")
88			{
89	sysadm	1.13	if ($lines_count + 1 >= $lines_limit)
90			{
91			break;
92			}
93
94			$result .= ($line . $end_of_line);
95	sysadm	1.10	$lines_count++;
96			$line = $prefix;
97			$line_len = $prefix_len;
98			continue;
99			}
100
101			// Process UTF-8 Chinese characters
102			$v1 = ord($c);
103	sysadm	1.21	if ($v1 & 0x80) //head of multi-byte character
104	sysadm	1.10	{
105	sysadm	1.21	$v2 = ($v1 & 0x70) << 1;
106			while ($v2 & 0x80)
107	sysadm	1.10	{
108			$i++;
109	sysadm	1.20	$c .= $str[$i];
110	sysadm	1.21	$v2 = ($v2 & 0x7f) << 1;
111	sysadm	1.10	}
112
113			// Each UTF-8 CJK character should use two character length for display
114			if ($line_len + 2 > $width)
115			{
116	sysadm	1.12	if ($lines_count + 1 >= $lines_limit)
117			{
118			break;
119			}
120
121	sysadm	1.13	$result .= ($line . $end_of_line);
122	sysadm	1.10	$lines_count++;
123			$line = $prefix;
124			$line_len = $prefix_len;
125			}
126			$line_len += 2;
127			}
128			else
129			{
130			$line_len++;
131			}
132
133	sysadm	1.15	if ($line_len > $width)
134	sysadm	1.3	{
135	sysadm	1.12	if ($lines_count + 1 >= $lines_limit)
136			{
137			break;
138			}
139
140	sysadm	1.13	$result .= ($line . $end_of_line);
141	sysadm	1.10	$lines_count++;
142	sysadm	1.4	$line = $prefix;
143	sysadm	1.15	$line_len = $prefix_len + 1;
144	sysadm	1.3	}
145	sysadm	1.15
146			$line .= $c;
147	sysadm	1.1	}
148	sysadm	1.11
149			if ($lines_count < $lines_limit)
150			{
151			$result .= $line;
152			}
153	sysadm	1.1
154			return $result;
155			}
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