From 432cae3222eb7a805e25b80e4db308d00f0f0e8c Mon Sep 17 00:00:00 2001
From: Dmitry Stogov <dmitry@php.net>
Date: Tue, 7 Mar 2006 08:43:21 +0000
Subject: [PATCH] Reverted "break label"

---
 NEWS                          |  3 --
 Zend/tests/break_label01.phpt | 56 -----------------------
 Zend/tests/break_label02.phpt | 66 ---------------------------
 Zend/tests/break_label03.phpt | 11 -----
 Zend/tests/break_label04.phpt | 14 ------
 Zend/tests/break_label05.phpt | 12 -----
 Zend/tests/break_label06.phpt | 12 -----
 Zend/tests/break_label07.phpt | 17 -------
 Zend/tests/break_label08.inc  | 11 -----
 Zend/tests/break_label08.phpt | 18 --------
 Zend/tests/break_label09.phpt | 26 -----------
 Zend/tests/break_label10.phpt | 33 --------------
 Zend/tests/break_label11.phpt | 58 ------------------------
 Zend/zend_compile.c           | 84 +----------------------------------
 Zend/zend_compile.h           |  7 ---
 Zend/zend_globals.h           |  4 --
 Zend/zend_language_parser.y   | 11 ++---
 17 files changed, 6 insertions(+), 437 deletions(-)
 delete mode 100755 Zend/tests/break_label01.phpt
 delete mode 100755 Zend/tests/break_label02.phpt
 delete mode 100755 Zend/tests/break_label03.phpt
 delete mode 100755 Zend/tests/break_label04.phpt
 delete mode 100755 Zend/tests/break_label05.phpt
 delete mode 100755 Zend/tests/break_label06.phpt
 delete mode 100755 Zend/tests/break_label07.phpt
 delete mode 100755 Zend/tests/break_label08.inc
 delete mode 100755 Zend/tests/break_label08.phpt
 delete mode 100755 Zend/tests/break_label09.phpt
 delete mode 100755 Zend/tests/break_label10.phpt
 delete mode 100755 Zend/tests/break_label11.phpt

diff --git a/NEWS b/NEWS
index 6ccef841eb..ea8dc5104e 100644
--- a/NEWS
+++ b/NEWS
@@ -10,9 +10,6 @@ PHP                                                                        NEWS
   for more details. (Dmitry)
 - Removed support for "continue" and "break" operators with non-constant
   operands. (Dmitry)
-- Added support for "continue" and "break" operators with labels. Each loop or
-  switch statement can be marked by label and then it is possible to write
-  "break <label>" instead of "break <number>". (Dmitry, Sara)
 - Changed __toString() behavior to call it in all necessary places
   (Marcus, Dmitry)
 - Changed "instanceof" and "catch" operators, is_a() and is_subclass_of()
diff --git a/Zend/tests/break_label01.phpt b/Zend/tests/break_label01.phpt
deleted file mode 100755
index 20e1a5c4b7..0000000000
--- a/Zend/tests/break_label01.phpt
+++ /dev/null
@@ -1,56 +0,0 @@
---TEST--
-labeled break 01: Old style "break <number>"
---FILE--
-<?php
-while (1) {
-	echo "1: ";
-	break 1;
-	echo "bug\n";
-}
-echo "ok\n";
-
-while (1) {
-	echo "2: ";
-	while (1) {
-		break 2;
-		echo "bug\n";
-	}
-	echo "bug\n";
-}
-echo "ok\n";
-
-while (1) {
-	echo "3: ";
-	while (1) {
-		break 1;
-		echo "bug\n";
-	}
-	break 1;
-	echo "bug\n";
-}
-echo "ok\n";
-
-while (1) {
-	echo "4: ";
-	switch (1) {
-		case 1:
-			break 2;
-			echo "bug\n";
-	}
-	echo "bug\n";
-}
-echo "ok\n";
-
-while (1) {
-	while (1) {
-		break 3;
-	}
-}
-?>
---EXPECTF--
-1: ok
-2: ok
-3: ok
-4: ok
-
-Fatal error: Cannot break/continue 3 levels in %sbreak_label01.php on line %d
diff --git a/Zend/tests/break_label02.phpt b/Zend/tests/break_label02.phpt
deleted file mode 100755
index 7c9a673452..0000000000
--- a/Zend/tests/break_label02.phpt
+++ /dev/null
@@ -1,66 +0,0 @@
---TEST--
-labeled break 02: New style "break <label>"
---FILE--
-<?php
-L1: while (1) {
-	echo "1: ";
-	break L1;
-	echo "bug\n";
-}
-
-echo "ok\n";
-
-L2: while (1) {
-	echo "2: ";
-	while (1) {
-		break L2;
-		echo "bug\n";
-	}
-	echo "bug\n";
-}
-
-echo "ok\n";
-
-L3: while (1) {
-	echo "3: ";
-	L4: while (1) {
-		break L4;
-		echo "bug\n";
-	}
-	break L3;
-	echo "bug\n";
-}
-
-echo "ok\n";
-
-L5: while (1) {
-	echo "4: ";
-	switch (1) {
-		case 1:
-			break L5;
-			echo "bug\n";
-	}
-	echo "bug\n";
-}
-
-echo "ok\n";
-
-L6: while (1) {
-	echo "5: ";
-	L7: switch (1) {
-		case 1:
-			break L7;
-			echo "bug\n";
-	}
-	break L6;
-	echo "bug\n";
-}
-
-echo "ok\n";
-?>
---EXPECT--
-1: ok
-2: ok
-3: ok
-4: ok
-5: ok
diff --git a/Zend/tests/break_label03.phpt b/Zend/tests/break_label03.phpt
deleted file mode 100755
index b3de5498fd..0000000000
--- a/Zend/tests/break_label03.phpt
+++ /dev/null
@@ -1,11 +0,0 @@
---TEST--
-labeled break 03: Undefined label
---FILE--
-<?php
-echo "bug\n";
-L1: while (1) {
-	break L2;
-}
-?>
---EXPECTF--
-Fatal error: break to undefined label 'L2' in %sbreak_label03.php on line %d
diff --git a/Zend/tests/break_label04.phpt b/Zend/tests/break_label04.phpt
deleted file mode 100755
index b947d0f9f0..0000000000
--- a/Zend/tests/break_label04.phpt
+++ /dev/null
@@ -1,14 +0,0 @@
---TEST--
-labeled break 04: Invalid label (another loop)
---FILE--
-<?php
-echo "bug\n";
-L1: while (1) {
-	break;
-}
-L2: while (1) {
-	break L1;
-}
-?>
---EXPECTF--
-Fatal error: break to label 'L1', that doesn't mark outer loop in %sbreak_label04.php on line %d
diff --git a/Zend/tests/break_label05.phpt b/Zend/tests/break_label05.phpt
deleted file mode 100755
index 98e72092af..0000000000
--- a/Zend/tests/break_label05.phpt
+++ /dev/null
@@ -1,12 +0,0 @@
---TEST--
-labeled break 05: Invalid label (non loop)
---FILE--
-<?php
-L1:
-echo "bug\n";
-while (1) {
-	break L1;
-}
-?>
---EXPECTF--
-Fatal error: break to label 'L1', that doesn't mark outer loop in %sbreak_label05.php on line %d
diff --git a/Zend/tests/break_label06.phpt b/Zend/tests/break_label06.phpt
deleted file mode 100755
index d2b3759e60..0000000000
--- a/Zend/tests/break_label06.phpt
+++ /dev/null
@@ -1,12 +0,0 @@
---TEST--
-labeled break 06: Invalid label (non declared yet)
---FILE--
-<?php
-echo "bug\n";
-while (1) {	
-	break L1;
-}
-L1:
-?>
---EXPECTF--
-Fatal error: break to undefined label 'L1' in %sbreak_label06.php on line %d
diff --git a/Zend/tests/break_label07.phpt b/Zend/tests/break_label07.phpt
deleted file mode 100755
index eb7d40a32e..0000000000
--- a/Zend/tests/break_label07.phpt
+++ /dev/null
@@ -1,17 +0,0 @@
---TEST--
-labeled break 07: Label redefinition 
---FILE--
-<?php
-echo "bug\n";
-L1: while (1) {	
-	L2: while (1) {	
-		break L1;
-	}
-}
-L3: while (1) {	
-	L1: while (1) {	
-		break L3;
-	}
-}
---EXPECTF--
-Fatal error: Label 'L1' already defined in %sbreak_label07.php on line %d
diff --git a/Zend/tests/break_label08.inc b/Zend/tests/break_label08.inc
deleted file mode 100755
index f424fb068f..0000000000
--- a/Zend/tests/break_label08.inc
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php
-L1: while (1) {	
-	echo "2: ";
-	L2: while (1) {	
-		break L1;
-		echo "bug\n";
-	}
-	echo "bug\n";
-}
-echo "ok\n";
-?>
diff --git a/Zend/tests/break_label08.phpt b/Zend/tests/break_label08.phpt
deleted file mode 100755
index 2aceb89fc8..0000000000
--- a/Zend/tests/break_label08.phpt
+++ /dev/null
@@ -1,18 +0,0 @@
---TEST--
-labeled break 08: Use the same <label> in different files
---FILE--
-<?php
-L1: while (1) {	
-	echo "1: ";
-	L2: while (1) {	
-		break L1;
-		echo "bug\n";
-	}
-	echo "bug\n";
-}
-echo "ok\n";
-include(dirname(__FILE__)."/break_label08.inc");
-?>
---EXPECT--
-1: ok
-2: ok
diff --git a/Zend/tests/break_label09.phpt b/Zend/tests/break_label09.phpt
deleted file mode 100755
index f5b4758fa6..0000000000
--- a/Zend/tests/break_label09.phpt
+++ /dev/null
@@ -1,26 +0,0 @@
---TEST--
-labeled break 09: Use the same <label> name in several copies of one file
---FILE--
-<?php
-if (isset($n)) {
-	++$n;
-} else {
-	$n = 1;
-}
-L1: while (1) {	
-	echo "$n: ";
-	L2: while (1) {	
-		break L1;
-		echo "bug\n";
-	}
-	echo "bug\n";
-}
-echo "ok\n";
-if ($n < 3) {
-	include(__FILE__);
-}
-?>
---EXPECTF--
-1: ok
-2: ok
-3: ok
diff --git a/Zend/tests/break_label10.phpt b/Zend/tests/break_label10.phpt
deleted file mode 100755
index 885beed249..0000000000
--- a/Zend/tests/break_label10.phpt
+++ /dev/null
@@ -1,33 +0,0 @@
---TEST--
-labeled break 10: foreach
---FILE--
-<?php
-
-Lend:
-foreach(array(1,2,3) as $k1 => $v1)
-{
-	echo "$k1=>$v1\n";
-	foreach(array(1,2,3) as $k2 => $v2)
-	{
-		echo "$k2=>$v2\n";
-		if ($v2 == 2)
-		{
-			if ($v1==2)
-			{
-				break Lend;
-			}
-			break;
-		}
-	}
-}
-
-?>
-===DONE===
---EXPECTF--
-0=>1
-0=>1
-1=>2
-1=>2
-0=>1
-1=>2
-===DONE===
diff --git a/Zend/tests/break_label11.phpt b/Zend/tests/break_label11.phpt
deleted file mode 100755
index f60010794b..0000000000
--- a/Zend/tests/break_label11.phpt
+++ /dev/null
@@ -1,58 +0,0 @@
---TEST--
-labeled break 11: foreach Iterator
---FILE--
-<?php
-
-class MyIterator implements Iterator
-{
-	protected $ar = array(1,2,3);
-	function rewind()
-	{
-		reset($this->ar);
-	}
-	function valid()
-	{
-		return key($this->ar) !== NULL;
-	}
-	function current()
-	{
-		return current($this->ar);
-	}
-	function key()
-	{
-		return key($this->ar);
-	}
-	function next()
-	{
-		next($this->ar);
-	}
-}
-
-Lend:
-foreach(new MyIterator as $k1 => $v1)
-{
-	echo "$k1=>$v1\n";
-	foreach(new MyIterator as $k2 => $v2)
-	{
-		echo "$k2=>$v2\n";
-		if ($v2 == 2)
-		{
-			if ($v1==2)
-			{
-				break Lend;
-			}
-			break;
-		}
-	}
-}
-
-?>
-===DONE===
---EXPECTF--
-0=>1
-0=>1
-1=>2
-1=>2
-0=>1
-1=>2
-===DONE===
diff --git a/Zend/zend_compile.c b/Zend/zend_compile.c
index f0dc4444e4..6d6f3c3769 100644
--- a/Zend/zend_compile.c
+++ b/Zend/zend_compile.c
@@ -148,9 +148,6 @@ void zend_init_compiler_data_structures(TSRMLS_D)
 	CG(start_lineno) = 0;
 	init_compiler_declarables(TSRMLS_C);
 	zend_hash_apply(CG(auto_globals), (apply_func_t) zend_auto_global_arm TSRMLS_CC);
-	zend_stack_init(&CG(labels_stack));
-	CG(labels) = NULL;
-	CG(last_label) = NULL;
 }
 
 
@@ -177,7 +174,6 @@ void shutdown_compiler(TSRMLS_D)
 	zend_hash_destroy(&CG(script_encodings_table));
 	zend_hash_destroy(&CG(filenames_table));
 	zend_llist_destroy(&CG(open_files));
-	zend_stack_destroy(&CG(labels_stack));
 }
 
 
@@ -679,10 +675,6 @@ static inline void do_begin_loop(TSRMLS_D)
 	CG(active_op_array)->current_brk_cont = CG(active_op_array)->last_brk_cont;
 	brk_cont_element = get_next_brk_cont_element(CG(active_op_array));
 	brk_cont_element->parent = parent;
-	if (CG(last_label)) {
-		CG(last_label)->loop = CG(active_op_array)->current_brk_cont;
-		CG(last_label) = NULL;
-	}
 }
 
 
@@ -1249,10 +1241,6 @@ void zend_do_begin_function_declaration(znode *function_token, znode *function_n
 		CG(doc_comment) = NULL;
 		CG(doc_comment_len) = 0;
 	}
-
-	zend_stack_push(&CG(labels_stack), (void *) &CG(labels), sizeof(HashTable*));
-	CG(labels) = NULL;
-	CG(last_label) = NULL;
 }
 
 void zend_do_handle_exception(TSRMLS_D)
@@ -1262,21 +1250,6 @@ void zend_do_handle_exception(TSRMLS_D)
 	opline->opcode = ZEND_HANDLE_EXCEPTION;
 	SET_UNUSED(opline->op1);
 	SET_UNUSED(opline->op2);
-
-	if (CG(labels)) {
-		zend_hash_destroy(CG(labels));
-		FREE_HASHTABLE(CG(labels));
-	}
-	if (!zend_stack_is_empty(&CG(labels_stack))) {
-		HashTable **pht;
-
-		zend_stack_top(&CG(labels_stack), (void**)&pht);
-		CG(labels) = *pht;
-		zend_stack_del_top(&CG(labels_stack));
-	} else {
-		CG(labels) = NULL;
-	}
-	CG(last_label) = NULL;
 }
 
 
@@ -2692,37 +2665,8 @@ void zend_do_brk_cont(zend_uchar op, znode *expr TSRMLS_DC)
 	if (expr) {
 		if (expr->op_type != IS_CONST) {
 			zend_error(E_COMPILE_ERROR, "'%s' operator with non-constant operand is no longer supported", op == ZEND_BRK ? "break" : "continue");
-		} else {
-			if (Z_TYPE(expr->u.constant) == IS_STRING ||
-			    Z_TYPE(expr->u.constant) == IS_UNICODE) {
-				zend_label *label;
-
-				if (CG(labels) == NULL ||
-				    zend_u_hash_find(CG(labels), Z_TYPE(expr->u.constant), Z_UNIVAL(expr->u.constant), Z_UNILEN(expr->u.constant)+1, (void**)&label) == FAILURE) {
-					zend_error(E_COMPILE_ERROR, "%s to undefined label '%R'", op == ZEND_BRK ? "break" : "continue", Z_TYPE(expr->u.constant), Z_UNIVAL(expr->u.constant));
-				}
-				
-				if (label->loop != -1) {
-					long distance = 1;
-					long current = CG(active_op_array)->current_brk_cont;
-
-					while (current != -1) {
-						if (label->loop == current) {
-							zval_dtor(&expr->u.constant);
-							Z_TYPE(expr->u.constant) = IS_LONG;
-							Z_LVAL(expr->u.constant) = distance;
-							break;
-						}
-						distance++;
-						current = CG(active_op_array)->brk_cont_array[current].parent;
-					}
-				}
-				if (Z_TYPE(expr->u.constant) != IS_LONG) {
-					zend_error(E_COMPILE_ERROR, "%s to label '%R', that doesn't mark outer loop", op == ZEND_BRK ? "break" : "continue", Z_TYPE(expr->u.constant), Z_UNIVAL(expr->u.constant));
-				}
-			} else if (Z_TYPE(expr->u.constant) != IS_LONG || Z_LVAL(expr->u.constant) < 1) {
-				zend_error(E_COMPILE_ERROR, "'%s' operator accepts only positive numbers and labels", op == ZEND_BRK ? "break" : "continue");
-			}
+		} else if (Z_TYPE(expr->u.constant) != IS_LONG || Z_LVAL(expr->u.constant) < 1) {
+			zend_error(E_COMPILE_ERROR, "'%s' operator accepts only positive numbers", op == ZEND_BRK ? "break" : "continue");
 		}
 		opline->op2 = *expr;
 	} else {
@@ -4371,30 +4315,6 @@ void zend_do_normalization(znode *result, znode *str TSRMLS_DC)
 	*result = opline->result;
 }
 
-void zend_do_label(znode *label TSRMLS_DC)
-{
-	zend_op_array *oparray = CG(active_op_array);
-	zend_label dest;
-
-	if (!CG(labels)) {
-		ALLOC_HASHTABLE(CG(labels));
-		zend_hash_init(CG(labels), 4, NULL, NULL, 0);
-	}
-
-	dest.brk_cont = oparray->current_brk_cont;
-	dest.loop = -1;
-	dest.opline_num = get_next_op_number(oparray);
-
-	if (zend_u_hash_add(CG(labels), Z_TYPE(label->u.constant), Z_UNIVAL(label->u.constant),
-					Z_UNILEN(label->u.constant) + 1, (void**)&dest, sizeof(zend_label), (void**)&CG(last_label)) == FAILURE) {
-		CG(last_label) = NULL;
-		zend_error(E_COMPILE_ERROR, "Label '%R' already defined", Z_TYPE(label->u.constant), Z_UNIVAL(label->u.constant));
-	}
-
-	/* Done with label now */
-	zval_dtor(&label->u.constant);
-}
-
 /*
  * Local variables:
  * tab-width: 4
diff --git a/Zend/zend_compile.h b/Zend/zend_compile.h
index 51da2581c5..cb5d5bf9c2 100644
--- a/Zend/zend_compile.h
+++ b/Zend/zend_compile.h
@@ -94,11 +94,6 @@ typedef struct _zend_brk_cont_element {
 	int parent;
 } zend_brk_cont_element;
 
-typedef struct _zend_label {
-	int brk_cont;
-	int loop;
-	zend_uint opline_num;
-} zend_label;
 
 typedef struct _zend_try_catch_element {
 	zend_uint try_op;
@@ -518,8 +513,6 @@ ZEND_API void function_add_ref(zend_function *function TSRMLS_DC);
 
 void zend_do_normalization(znode *result, znode *str TSRMLS_DC);
 
-void zend_do_label(znode *label TSRMLS_DC);
-
 #define INITIAL_OP_ARRAY_SIZE 64
 
 
diff --git a/Zend/zend_globals.h b/Zend/zend_globals.h
index a397c65974..6af32473b1 100644
--- a/Zend/zend_globals.h
+++ b/Zend/zend_globals.h
@@ -136,10 +136,6 @@ struct _zend_compiler_globals {
 	HashTable script_encodings_table;
 	char *script_encoding;
 
-	HashTable *labels;
-	zend_label *last_label;
-	zend_stack labels_stack;
-
 #ifdef ZTS
 	HashTable **static_members;
 	int last_static_member;
diff --git a/Zend/zend_language_parser.y b/Zend/zend_language_parser.y
index 69ea6fb657..a0addb86dc 100644
--- a/Zend/zend_language_parser.y
+++ b/Zend/zend_language_parser.y
@@ -183,12 +183,11 @@ inner_statement:
 
 
 statement:
-		unticked_statement { CG(last_label) = NULL; zend_do_ticks(TSRMLS_C); }
-	|	T_STRING ':' { zend_do_label(&$1 TSRMLS_CC); }
+		unticked_statement { zend_do_ticks(TSRMLS_C); }
 ;
 
 unticked_statement:
-		'{' { CG(last_label) = NULL; } inner_statement_list '}'
+		'{' inner_statement_list '}'
 	|	T_IF '(' expr ')' { zend_do_if_cond(&$3, &$4 TSRMLS_CC); } statement { zend_do_if_after_statement(&$4, 1 TSRMLS_CC); } elseif_list else_single { zend_do_if_end(TSRMLS_C); }
 	|	T_IF '(' expr ')' ':' { zend_do_if_cond(&$3, &$4 TSRMLS_CC); } inner_statement_list { zend_do_if_after_statement(&$4, 1 TSRMLS_CC); } new_elseif_list new_else_single T_ENDIF ';' { zend_do_if_end(TSRMLS_C); }
 	|	T_WHILE '(' { $1.u.opline_num = get_next_op_number(CG(active_op_array));  } expr  ')' { zend_do_while_cond(&$4, &$5 TSRMLS_CC); } while_statement { zend_do_while_end(&$1, &$5 TSRMLS_CC); }
@@ -204,11 +203,9 @@ unticked_statement:
 			for_statement { zend_do_for_end(&$7 TSRMLS_CC); }
 	|	T_SWITCH '(' expr ')'	{ zend_do_switch_cond(&$3 TSRMLS_CC); } switch_case_list { zend_do_switch_end(&$6 TSRMLS_CC); }
 	|	T_BREAK ';'				{ zend_do_brk_cont(ZEND_BRK, NULL TSRMLS_CC); }
-	|	T_BREAK T_LNUMBER ';'		{ zend_do_brk_cont(ZEND_BRK, &$2 TSRMLS_CC); }
-	|	T_BREAK T_STRING ';'		{ zend_do_brk_cont(ZEND_BRK, &$2 TSRMLS_CC); }
+	|	T_BREAK expr ';'		{ zend_do_brk_cont(ZEND_BRK, &$2 TSRMLS_CC); }
 	|	T_CONTINUE ';'			{ zend_do_brk_cont(ZEND_CONT, NULL TSRMLS_CC); }
-	|	T_CONTINUE T_LNUMBER ';'		{ zend_do_brk_cont(ZEND_CONT, &$2 TSRMLS_CC); }
-	|	T_CONTINUE T_STRING ';'		{ zend_do_brk_cont(ZEND_CONT, &$2 TSRMLS_CC); }
+	|	T_CONTINUE expr ';'		{ zend_do_brk_cont(ZEND_CONT, &$2 TSRMLS_CC); }
 	|	T_RETURN ';'						{ zend_do_return(NULL, 0 TSRMLS_CC); }
 	|	T_RETURN expr_without_variable ';'	{ zend_do_return(&$2, 0 TSRMLS_CC); }
 	|	T_RETURN variable ';'				{ zend_do_return(&$2, 1 TSRMLS_CC); }
-- 
2.50.1