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Bug #25745 Character type functions fail on negative chars
Submitted: 2003-10-03 11:41 UTC Modified: 2003-10-03 12:13 UTC
From: vesely at tana dot it Assigned: moriyoshi (profile)
Status: Closed Package: *Languages/Translation
PHP Version: 4.3.2 OS: Solaris 8 (SPARC)
Private report: No CVE-ID: None
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 [2003-10-03 11:41 UTC] vesely at tana dot it
The upper half of the codes are badly reported, e.g
ctype_alpha("?") returns true even under C locale.

As a workaround one may call ctype_alpha(ord("?")),
which works correctly.

Alternatively, the following patch fixes that:

--- php-4.3.2/ext/ctype/ctype.c%        2003-10-03 13:13:46.870457000 +0200
+++ php-4.3.2/ext/ctype/ctype.c 2003-10-03 13:13:46.880455000 +0200
@@ -100,7 +100,7 @@
                RETURN_BOOL(iswhat(Z_LVAL_P(c))); \
        case IS_STRING: \
                { \
-                       char *p; \
+                       unsigned char *p; \
                        int n, len; \
                        p=Z_STRVAL_P(c); \
                        len = Z_STRLEN_P(c); \

below I list character type functions for
easing bug searches

ctype_alnum ctype_alpha ctype_cntrl ctype_digit
ctype_graph ctype_lower ctype_print ctype_punct
ctype_space ctype_upper ctype_xdigit 

Reproduce code:
        $ctype_funcs = array(
        "alnum", "alpha", "cntrl", "digit",
        "graph", "lower", "print", "punct",
        "space", "upper", "xdigit");
        $failed = 0;

        while ($name = current($ctype_funcs)) {
                $test = "\$failed += (
                        (ctype_$name(%d) ? 1 : 0) !=
                        (ctype_$name(chr(%d)) ? 1 : 0)
		) ? 1 : 0;";
                for ($i = 0; $i < 256; ++$i)
                        eval(sprintf($test, $i, $i));
        print "$failed";

Expected result:

Actual result:


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 [2003-10-03 11:59 UTC] vesely at tana dot it
I got 817 compiling with gcc 3.2 on sun sparc solaris8,
depending on the __ctype table, results may vary.
 [2003-10-03 12:13 UTC]
This bug has been fixed in CVS.

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