MFH: fix #41118 (PHP does not handle overflow of octal integers)

Zend/tests/hex_overflow_32bit.phpt

@@ -0,0 +1,27 @@
+--TEST--
+testing integer overflow (32bit)
+--SKIPIF--
+<?php if (PHP_INT_SIZE != 4) die("skip this test is for 32bit platform only"); ?>
+--FILE--
+<?php
+
+$doubles = array(
+	0x1736123FFFAAA,
+	0XFFFFFFFFFFFFFFFFFF,
+	0xAAAAAAAAAAAAAAEEEEEEEEEBBB,
+	0x66666666666666666777777,
+	);
+
+foreach ($doubles as $d) {
+	$l = $d;
+	var_dump($l);
+}
+
+echo "Done\n";
+?>
+--EXPECTF--	
+float(4083360297110%d)
+float(4.7223664828%dE+21)
+float(1.3521606402%dE+31)
+float(1.9807040628%dE+27)
+Done

Zend/tests/oct_overflow_32bit.phpt

@@ -0,0 +1,29 @@
+--TEST--
+testing integer overflow (32bit)
+--SKIPIF--
+<?php if (PHP_INT_SIZE != 4) die("skip this test is for 32bit platform only"); ?>
+--FILE--
+<?php
+
+$doubles = array(
+	076545676543223,
+	032325463734,
+	077777797777777,
+	07777777777777977777777777,
+	03333333333333382222222222222,
+	);
+
+foreach ($doubles as $d) {
+	$l = (double)$d;
+	var_dump($l);
+}
+
+echo "Done\n";
+?>
+--EXPECTF--	
+float(4308640384%d)
+float(3545655%d)
+float(262143)
+float(549755813%d)
+float(1884877076%d)
+Done

Zend/zend_language_scanner.l

@@ -1247,7 +1247,11 @@ NEWLINE ("\r"|"\n"|"\r\n")
 		errno = 0;
 		zendlval->value.lval = strtol(yytext, NULL, 0);
 		if (errno == ERANGE) { /* Overflow */
-			zendlval->value.dval = zend_strtod(yytext, NULL);
+			if (yytext[0] == '0') { /* octal overflow */
+				zendlval->value.dval = zend_oct_strtod(yytext, NULL);
+			} else {
+				zendlval->value.dval = zend_strtod(yytext, NULL);
+			}
 			zendlval->type = IS_DOUBLE;
 			return T_DNUMBER;
 		}

Zend/zend_strtod.c

@@ -2604,6 +2604,34 @@ ZEND_API double zend_hex_strtod(const char *str, char **endptr)
 	return value;
 }
 
+ZEND_API double zend_oct_strtod(const char *str, char **endptr)
+{
+	const char *s = str;
+	char c;
+	double value = 0;
+	int any = 0;
+
+	/* skip leading zero */
+	s++;
+
+	while ((c = *s++)) {
+		if (c > '7') {
+			/* break and return the current value if the number is not well-formed
+			 * that's what Linux strtol() does 
+			 */
+			break;
+		}
+		value = value * 8 + c - '0';
+		any = 1;
+	}
+
+	if (endptr != NULL) {
+		*endptr = (char *)(any ? s - 1 : str);
+	}
+
+	return value;
+}
+
 /*
  * Local variables:
  * tab-width: 4

Zend/zend_strtod.h

@@ -29,6 +29,7 @@ ZEND_API void zend_freedtoa(char *s);
 ZEND_API char * zend_dtoa(double _d, int mode, int ndigits, int *decpt, int *sign, char **rve);
 ZEND_API double zend_strtod(const char *s00, char **se);
 ZEND_API double zend_hex_strtod(const char *str, char **endptr);
+ZEND_API double zend_oct_strtod(const char *str, char **endptr);
 ZEND_API int zend_startup_strtod(void);
 ZEND_API int zend_shutdown_strtod(void);
 END_EXTERN_C()