#31324 [Opn-Fbk]: function strlen miscounts
ID: 31324 Updated by: [EMAIL PROTECTED] Reported By: phpbug at tore dot cc -Status: Open +Status: Feedback Bug Type: Strings related Operating System: Solaris 10 PHP Version: 5.0.2 New Comment: It's impossible to extract that code from PHP, and as we don't have access to a solaris machine we can not really debug this. Previous Comments: [2004-12-29 23:22:50] phpbug at tore dot cc Are 64bit processors not supported by php? Which machine architecture is 'my system'? The php is compiled with gcc2 AND gcc3. With solaris 9 AND solaris 10. The same trouble occurs. So I need to have the code for 'strlen' in php extracted before I can figure out where the source for the trouble is. A simple C-program using string.h's strlen cause no troule at all. [2004-12-29 21:42:53] [EMAIL PROTECTED] Sounds like either a compiler or libc bug. I cannot replicate this on my systems either. [2004-12-29 19:13:28] phpbug at tore dot cc I might add that I tried php-5.0.3 on an intel-based solaris 10 machine and there were no problems with the strlen. [2004-12-29 07:34:41] phpbug at tore dot cc I have used gcc2 and gcc3 to compile. The machine is a sparc. The problem occurs on solaris 9 and solaris 10. If you suspect that this is a solaris problem, can you extract the code for 'strlen' in php. I could make some tests in C [2004-12-28 23:59:37] [EMAIL PROTECTED] It still works fine for me on Linux. Which compiler did you use to compile PHP (gcc or sun workshop), and what kind of platform do you use? intel (32/64), sparc... The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/31324 -- Edit this bug report at http://bugs.php.net/?id=31324edit=1
#31324 [Opn-Fbk]: function strlen miscounts
ID: 31324
Updated by: [EMAIL PROTECTED]
Reported By: phpbug at tore dot cc
-Status: Open
+Status: Feedback
Bug Type: Strings related
Operating System: Solaris 10
PHP Version: 5.0.2
New Comment:
I don't understand what your script is doing, please come up with a
trivial script instead of those loops.
Previous Comments:
[2004-12-28 18:38:55] phpbug at tore dot cc
My configuration:
./configure --with-apxs=/opt/csw/apache/bin/apxs --with-mod_charset
--with-openssl=/opt/csw --enable-ftp --with-imap-ssl
--with-jpeg=/usr/csw/lib --with-mysql=/opt/sfw/mysql --with-pgsql
--enable-mbstr-enc-trans --enable-mbstring --enable-mbregex
--with-tiff=/usr/sfc/lib --enable-inline-optimization
--with-imap=/mnt/slask/src/imap-2002 --with-java=/usr/j2se
--with-ming=/usr/local --with-orc8=/opt/oracle
--with-gettext --with-xml --with-dom --with-zlib --enable-cli
--enable-zend-multibyte --with-mod_charset --enable-gd-jis-conv
--disable-libxml
[2004-12-28 18:36:13] phpbug at tore dot cc
Description:
I have discoverd that a large amount of the php-scripts are using
'strlen' to count length of arbitrary strings.
strlen can not cope with arbitrary strings!
Code like will only show garbage values:
$a = fread($binaryfile,$count);
print strlen($a) . number of bytes is read from
the binary file;
Reproduce code:
---
?php
$s='';
print html\n;
for($i=142;$i256;$i++){
$s.=pack(C,$i);
$result = count_chars($s, 0);
$l=0;
for ($j=0; $j 256; $j++) {
$l+=$result[$j];
}
print brThe variable s has the length: .
strlen($s) . (actual length) . $l . /br\n;
}
print /html\n;
?
Expected result:
The variable s has the length: 1 (actual length) 1
The variable s has the length: 1 (actual length) 2
The variable s has the length: 2 (actual length) 3
The variable s has the length: 3 (actual length) 4
The variable s has the length: 4 (actual length) 5
The variable s has the length: 5 (actual length) 6
The variable s has the length: 6 (actual length) 7
The variable s has the length: 7 (actual length) 8
The variable s has the length: 8 (actual length) 9
The variable s has the length: 9 (actual length) 10
The variable s has the length: 10 (actual length) 11
The variable s has the length: 11 (actual length) 12
.
.
.
The variable s has the length: 64 (actual length) 111
The variable s has the length: 65 (actual length) 112
The variable s has the length: 65 (actual length) 113
The variable s has the length: 66 (actual length) 114
Actual result:
--
The variable s has the length: 1 (actual length) 1
The variable s has the length: 2 (actual length) 2
The variable s has the length: 3 (actual length) 3
The variable s has the length: 4 (actual length) 4
The variable s has the length: 5 (actual length) 5
The variable s has the length: 6 (actual length) 6
The variable s has the length: 7 (actual length) 7
The variable s has the length: 8 (actual length) 8
The variable s has the length: 9 (actual length) 9
The variable s has the length: 10 (actual length) 10
The variable s has the length: 11 (actual length) 11
The variable s has the length: 12 (actual length) 12
.
.
.
The variable s has the length: 111 (actual length) 111
The variable s has the length: 112 (actual length) 112
The variable s has the length: 113 (actual length) 113
The variable s has the length: 114 (actual length) 114
--
Edit this bug report at http://bugs.php.net/?id=31324edit=1
#31324 [Opn-Fbk]: function strlen miscounts
ID: 31324
Updated by: [EMAIL PROTECTED]
Reported By: phpbug at tore dot cc
-Status: Open
+Status: Feedback
Bug Type: Strings related
Operating System: Solaris 10
PHP Version: 5.0.2
New Comment:
Please try using this CVS snapshot:
http://snaps.php.net/php5-STABLE-latest.tar.gz
For Windows:
http://snaps.php.net/win32/php5.0-win32-latest.zip
Both in 4.3.10RC2, 5.0.3-dev, and 5.1.0-dev it prints as expected:
The variable s has the length: 1 (actual length) 1
So please try a snapshot.
Previous Comments:
[2004-12-28 21:57:50] phpbug at tore dot cc
How about:
?php
$s=pack(C,143);
$result = count_chars($s, 0);
print The variable s has the length: .
strlen($s) . (actual length) . $result[143] .
\n;
?
Gives printout:
The variable s has the length: 0 (actual length) 1
The 'pack' creates a bit-string with a length of 1 char.
The 'strlen' should should recognize it as a char with length 1. As you
can see below 'strlen' does not only miscalculates the string length for
the char 143.
[2004-12-28 19:19:36] [EMAIL PROTECTED]
I don't understand what your script is doing, please come up with a
trivial script instead of those loops.
[2004-12-28 18:38:55] phpbug at tore dot cc
My configuration:
./configure --with-apxs=/opt/csw/apache/bin/apxs --with-mod_charset
--with-openssl=/opt/csw --enable-ftp --with-imap-ssl
--with-jpeg=/usr/csw/lib --with-mysql=/opt/sfw/mysql --with-pgsql
--enable-mbstr-enc-trans --enable-mbstring --enable-mbregex
--with-tiff=/usr/sfc/lib --enable-inline-optimization
--with-imap=/mnt/slask/src/imap-2002 --with-java=/usr/j2se
--with-ming=/usr/local --with-orc8=/opt/oracle
--with-gettext --with-xml --with-dom --with-zlib --enable-cli
--enable-zend-multibyte --with-mod_charset --enable-gd-jis-conv
--disable-libxml
[2004-12-28 18:36:13] phpbug at tore dot cc
Description:
I have discoverd that a large amount of the php-scripts are using
'strlen' to count length of arbitrary strings.
strlen can not cope with arbitrary strings!
Code like will only show garbage values:
$a = fread($binaryfile,$count);
print strlen($a) . number of bytes is read from
the binary file;
Reproduce code:
---
?php
$s='';
print html\n;
for($i=142;$i256;$i++){
$s.=pack(C,$i);
$result = count_chars($s, 0);
$l=0;
for ($j=0; $j 256; $j++) {
$l+=$result[$j];
}
print brThe variable s has the length: .
strlen($s) . (actual length) . $l . /br\n;
}
print /html\n;
?
Expected result:
The variable s has the length: 1 (actual length) 1
The variable s has the length: 1 (actual length) 2
The variable s has the length: 2 (actual length) 3
The variable s has the length: 3 (actual length) 4
The variable s has the length: 4 (actual length) 5
The variable s has the length: 5 (actual length) 6
The variable s has the length: 6 (actual length) 7
The variable s has the length: 7 (actual length) 8
The variable s has the length: 8 (actual length) 9
The variable s has the length: 9 (actual length) 10
The variable s has the length: 10 (actual length) 11
The variable s has the length: 11 (actual length) 12
.
.
.
The variable s has the length: 64 (actual length) 111
The variable s has the length: 65 (actual length) 112
The variable s has the length: 65 (actual length) 113
The variable s has the length: 66 (actual length) 114
Actual result:
--
The variable s has the length: 1 (actual length) 1
The variable s has the length: 2 (actual length) 2
The variable s has the length: 3 (actual length) 3
The variable s has the length: 4 (actual length) 4
The variable s has the length: 5 (actual length) 5
The variable s has the length: 6 (actual length) 6
The variable s has the length: 7 (actual length) 7
The variable s has the length: 8 (actual length) 8
The variable s has the length: 9 (actual length) 9
The variable s has the length: 10 (actual length) 10
The variable s has the length: 11 (actual length) 11
The variable s has the length: 12 (actual length) 12
.
.
.
The variable s has the length: 111 (actual length) 111
The variable s has the length: 112 (actual length) 112
The variable s has the length: 113 (actual length) 113
The variable s has the length: 114 (actual length) 114
--
Edit this bug report at http://bugs.php.net/?id=31324edit=1
#31324 [Opn-Fbk]: function strlen miscounts
ID: 31324 Updated by: [EMAIL PROTECTED] Reported By: phpbug at tore dot cc -Status: Open +Status: Feedback Bug Type: Strings related Operating System: Solaris 10 PHP Version: 5.0.2 New Comment: It still works fine for me on Linux. Which compiler did you use to compile PHP (gcc or sun workshop), and what kind of platform do you use? intel (32/64), sparc... Previous Comments: [2004-12-28 23:40:36] phpbug at tore dot cc Sorry, my mistake! It seems to work on one char long strings. I made a better script (still avoiding loops...). ?php $s=pack(C*,0x8e,0x8f); $t=pack(C*,0x8e); $u=pack(C*,0x8e,0x8f,0x90); print The variable s has the length: . strlen($s) . \n; print The variable t has the length: . strlen($t) . \n; print The variable u has the length: . strlen($u) . \n; ? Result: The variable s has the length: 1 The variable t has the length: 1 The variable u has the length: 2 The result should be: The variable s has the length: 2 The variable t has the length: 1 The variable u has the length: 3 Since s=2 chars, t=1 char and u 3 chars long. Lets try another test with 7 bit chars. ?php $s=pack(C*,0x30,0x31); $t=pack(C*,0x30); $u=pack(C*,0x30,0x31,0x32); print The variable s has the length: . strlen($s) . \n; print The variable t has the length: . strlen($t) . \n; print The variable u has the length: . strlen($u) . \n; ? Result: The variable s has the length: 2 The variable t has the length: 1 The variable u has the length: 3 As expected. No problem with low values on the chars. [2004-12-28 23:07:29] [EMAIL PROTECTED] Please try using this CVS snapshot: http://snaps.php.net/php5-STABLE-latest.tar.gz For Windows: http://snaps.php.net/win32/php5.0-win32-latest.zip Both in 4.3.10RC2, 5.0.3-dev, and 5.1.0-dev it prints as expected: The variable s has the length: 1 (actual length) 1 So please try a snapshot. [2004-12-28 21:57:50] phpbug at tore dot cc How about: ?php $s=pack(C,143); $result = count_chars($s, 0); print The variable s has the length: . strlen($s) . (actual length) . $result[143] . \n; ? Gives printout: The variable s has the length: 0 (actual length) 1 The 'pack' creates a bit-string with a length of 1 char. The 'strlen' should should recognize it as a char with length 1. As you can see below 'strlen' does not only miscalculates the string length for the char 143. [2004-12-28 19:19:36] [EMAIL PROTECTED] I don't understand what your script is doing, please come up with a trivial script instead of those loops. [2004-12-28 18:38:55] phpbug at tore dot cc My configuration: ./configure --with-apxs=/opt/csw/apache/bin/apxs --with-mod_charset --with-openssl=/opt/csw --enable-ftp --with-imap-ssl --with-jpeg=/usr/csw/lib --with-mysql=/opt/sfw/mysql --with-pgsql --enable-mbstr-enc-trans --enable-mbstring --enable-mbregex --with-tiff=/usr/sfc/lib --enable-inline-optimization --with-imap=/mnt/slask/src/imap-2002 --with-java=/usr/j2se --with-ming=/usr/local --with-orc8=/opt/oracle --with-gettext --with-xml --with-dom --with-zlib --enable-cli --enable-zend-multibyte --with-mod_charset --enable-gd-jis-conv --disable-libxml The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/31324 -- Edit this bug report at http://bugs.php.net/?id=31324edit=1
