is_numeric_string() optimization

# Original Patch by Matt Wilmas

1 files changed, 33 insertions, 0 deletions

diff --git a/Zend/zend_strtod.c b/Zend/zend_strtod.c
index 4fed8c3552..d388697f5b 100644
--- a/Zend/zend_strtod.c
+++ b/Zend/zend_strtod.c
@@ -2557,6 +2557,39 @@ ret:
 	return result;
 }
 
+ZEND_API double zend_hex_strtod(const char *str, char **endptr)
+{
+	const char *s = str;
+	char c;
+	int any = 0;
+	double value = 0;
+
+	if (*s == '0' && (s[1] == 'x' || s[1] == 'X')) {
+		s += 2;
+	}
+
+	while (c = *s++) {
+		if (c >= '0' && c <= '9') {
+			c -= '0';
+		} else if (c >= 'A' && c <= 'F') {
+			c -= 'A' - 10;
+		} else if (c >= 'a' && c <= 'f') {
+			c -= 'a' - 10;
+		} else {
+			break;
+		}
+
+		any = 1;
+		value = value * 16 + c;
+	}
+
+	if (endptr != NULL) {
+		*endptr = (char *)(any ? s - 1 : str);
+	}
+
+	return value;
+}
+
 /*
  * Local variables:
  * tab-width: 4