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Unicode support in substr_compare().

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This commit is contained in:
Andrei Zmievski 2006-10-04 17:25:12 +00:00
parent 5bfefaf37e
commit 4b3a597d29
1 changed files with 57 additions and 16 deletions
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73
ext/standard/string.c
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@ -7316,17 +7316,19 @@ PHP_FUNCTION(strpbrk)
}
/* }}} */
/* {{{ proto int substr_compare(string main_str, string str, int offset [, int length [, bool case_sensitivity]])
/* {{{ proto int substr_compare(string main_str, string str, int offset [, int length [, bool case_sensitivity]]) U
Binary safe optionally case insensitive comparison of 2 strings from an offset, up to length characters */
PHP_FUNCTION(substr_compare)
{
char *s1, *s2;
zstr s1, s2;
int s1_len, s2_len;
long offset, len=0;
zend_uchar str_type;
long offset, start_offset, end_offset, len=0;
zend_bool cs=0;
uint cmp_len;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ssl|lb", &s1, &s1_len, &s2, &s2_len, &offset, &len, &cs) == FAILURE) {
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "TTl|lb", &s1, &s1_len,
&str_type, &s2, &s2_len, &str_type, &offset, &len, &cs) == FAILURE) {
RETURN_FALSE;
}
@ -7335,22 +7337,61 @@ PHP_FUNCTION(substr_compare)
RETURN_FALSE;
}
if (offset < 0) {
offset = s1_len + offset;
offset = (offset < 0) ? 0 : offset;
}
if (str_type == IS_UNICODE) {
/* calculate starting offset of the segment */
if (offset < 0) {
if (-offset > s1_len) {
start_offset = 0;
} else {
start_offset = s1_len;
U16_BACK_N(s1.u, 0, start_offset, -offset);
}
} else {
start_offset = 0;
U16_FWD_N(s1.u, start_offset, s1_len, offset);
}
if ((offset + len) > s1_len) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "The start position cannot exceed initial string length");
RETURN_FALSE;
}
/* calculate ending offset of the segment */
if (len) {
end_offset = start_offset;
while (len > 0 && end_offset < s1_len) {
U16_FWD_1_UNSAFE(s1.u, end_offset);
--len;
}
cmp_len = (uint) (len ? len : MAX(s2_len, (s1_len - offset)));
if (len > 0) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "The specified segment exceeds string length");
RETURN_FALSE;
}
} else {
end_offset = s1_len;
}
if (!cs) {
RETURN_LONG(zend_binary_strncmp(s1 + offset, (s1_len - offset), s2, s2_len, cmp_len));
cmp_len = MAX(s2_len, (end_offset - start_offset));
if (!cs) {
RETURN_LONG(zend_u_binary_strncmp(s1.u + start_offset, (s1_len - start_offset), s2.u, s2_len, cmp_len));
} else {
RETURN_LONG(zend_u_binary_strncasecmp(s1.u + start_offset, (s1_len - start_offset), s2.u, s2_len, cmp_len));
}
} else {
RETURN_LONG(zend_binary_strncasecmp(s1 + offset, (s1_len - offset), s2, s2_len, cmp_len));
if (offset < 0) {
offset = s1_len + offset;
offset = (offset < 0) ? 0 : offset;
}
if ((offset + len) > s1_len) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "The specified segment exceeds string length");
RETURN_FALSE;
}
cmp_len = (uint) (len ? len : MAX(s2_len, (s1_len - offset)));
if (!cs) {
RETURN_LONG(zend_binary_strncmp(s1.s + offset, (s1_len - offset), s2.s, s2_len, cmp_len));
} else {
RETURN_LONG(zend_binary_strncasecmp(s1.s + offset, (s1_len - offset), s2.s, s2_len, cmp_len));
}
}
}
/* }}} */