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remove \u, \U and \C support in single quotes, as they are meant to contain binary data only and no escape sequences except \'

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fixes bug #42746
This commit is contained in:
Antony Dovgal 2007-10-03 18:38:35 +00:00
parent 55d3a263f0
commit c53602571d
2 changed files with 0 additions and 63 deletions
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5
README.UNICODE
View file

@ -460,11 +460,6 @@ PHP interprets the contents of strings as follows:
- a new escape sequence allows specifying a character by its full
Unicode name, e.g. \C{THAI CHARACTER PHO SAMPHAO} => U+0E20
The single-quoted string is more restrictive than the other two types. So far
the only escape sequence allowed inside of it was \', which specifies a literal
single quote. However, single quoted strings now support the new Unicode
character escape sequences as well.
PHP allows variable interpolation inside the double-quoted and heredoc strings.
However, the parser separates the string into literal and variable chunks during
compilation, e.g. "abc $var def" -> "abc" . $var . "def". This means that PHP

58
Zend/zend_language_scanner.l
View file

@ -1187,64 +1187,6 @@ static int zend_scan_unicode_single_string(zval *zendlval TSRMLS_DC)
*t++ = *s;
Z_USTRLEN_P(zendlval)--;
break;
case 0x43: /*'C'*/
{
UChar *p = s+1;
if (p < end && zend_parse_charname_sequence(&p, end, &codepoint TSRMLS_CC)) {
Z_USTRLEN_P(zendlval) -= p - s + 1;
s = p;
if (U_IS_BMP(codepoint)) {
*t++ = (UChar) codepoint;
} else {
*t++ = (UChar) U16_LEAD(codepoint);
*t++ = (UChar) U16_TRAIL(codepoint);
Z_USTRLEN_P(zendlval)++;
}
} else {
zend_error(E_COMPILE_WARNING, "Invalid \\C{..} sequence");
efree(Z_USTRVAL_P(zendlval));
return 0;
}
break;
}
case 0x75 /*'u'*/:
{
codepoint = 0;
if (zend_udigits_to_codepoint(s+1, end, &codepoint, 4)) {
*t++ = (UChar) codepoint;
s += 4;
Z_USTRLEN_P(zendlval) -= 5;
} else {
zend_error(E_COMPILE_WARNING,"\\u escape sequence requires exactly 4 hexadecimal digits");
efree(Z_USTRVAL_P(zendlval));
return 0;
}
break;
}
case 0x55 /*'U'*/:
{
codepoint = 0;
if (zend_udigits_to_codepoint(s+1, end, &codepoint, 6)) {
if (U_IS_BMP(codepoint)) {
*t++ = (UChar) codepoint;
Z_USTRLEN_P(zendlval) -= 7;
} else if (codepoint <= 0x10FFFF) {
*t++ = (UChar) U16_LEAD(codepoint);
*t++ = (UChar) U16_TRAIL(codepoint);
Z_USTRLEN_P(zendlval) -= 6;
} else {
zend_error(E_COMPILE_WARNING,"\\U%06x is above the highest valid codepoint 0x10FFFF", codepoint);
efree(Z_USTRVAL_P(zendlval));
return 0;
}
s += 6;
} else {
zend_error(E_COMPILE_WARNING,"\\U escape sequence requires exactly 6 hexadecimal digits");
efree(Z_USTRVAL_P(zendlval));
return 0;
}
break;
}
default:
*t++ = 0x5C; /*'\\'*/
*t++ = *s;