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4887357269
RFC: https://wiki.php.net/rfc/flexible_heredoc_nowdoc_syntaxes * The ending label no longer has to be followed by a semicolon or newline. Any non-label character is fine. * The ending label may be indented. The indentation will be stripped from all lines in the heredoc/nowdoc string. Lexing of heredoc strings performs a scan-ahead to determine the indentation of the ending label, so that the correct amount of indentation can be removed when calculting the semantic values for use by the parser. This makes the implementation quite a bit more complicated than we would like :/
131 lines
4.4 KiB
C
131 lines
4.4 KiB
C
/*
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+----------------------------------------------------------------------+
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| Zend Engine |
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+----------------------------------------------------------------------+
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| Copyright (c) 1998-2018 Zend Technologies Ltd. (http://www.zend.com) |
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+----------------------------------------------------------------------+
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| This source file is subject to version 2.00 of the Zend license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.zend.com/license/2_00.txt. |
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| If you did not receive a copy of the Zend license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@zend.com so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Authors: Andi Gutmans <andi@zend.com> |
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| Zeev Suraski <zeev@zend.com> |
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+----------------------------------------------------------------------+
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*/
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/* $Id$ */
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#ifndef ZEND_PTR_STACK_H
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#define ZEND_PTR_STACK_H
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typedef struct _zend_ptr_stack {
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int top, max;
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void **elements;
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void **top_element;
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zend_bool persistent;
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} zend_ptr_stack;
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#define PTR_STACK_BLOCK_SIZE 64
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BEGIN_EXTERN_C()
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ZEND_API void zend_ptr_stack_init(zend_ptr_stack *stack);
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ZEND_API void zend_ptr_stack_init_ex(zend_ptr_stack *stack, zend_bool persistent);
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ZEND_API void zend_ptr_stack_n_push(zend_ptr_stack *stack, int count, ...);
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ZEND_API void zend_ptr_stack_n_pop(zend_ptr_stack *stack, int count, ...);
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ZEND_API void zend_ptr_stack_destroy(zend_ptr_stack *stack);
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ZEND_API void zend_ptr_stack_apply(zend_ptr_stack *stack, void (*func)(void *));
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ZEND_API void zend_ptr_stack_reverse_apply(zend_ptr_stack *stack, void (*func)(void *));
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ZEND_API void zend_ptr_stack_clean(zend_ptr_stack *stack, void (*func)(void *), zend_bool free_elements);
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ZEND_API int zend_ptr_stack_num_elements(zend_ptr_stack *stack);
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END_EXTERN_C()
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#define ZEND_PTR_STACK_RESIZE_IF_NEEDED(stack, count) \
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if (stack->top+count > stack->max) { \
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/* we need to allocate more memory */ \
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do { \
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stack->max += PTR_STACK_BLOCK_SIZE; \
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} while (stack->top+count > stack->max); \
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stack->elements = (void **) perealloc(stack->elements, (sizeof(void *) * (stack->max)), stack->persistent); \
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stack->top_element = stack->elements+stack->top; \
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}
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/* Not doing this with a macro because of the loop unrolling in the element assignment.
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Just using a macro for 3 in the body for readability sake. */
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static zend_always_inline void zend_ptr_stack_3_push(zend_ptr_stack *stack, void *a, void *b, void *c)
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{
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#define ZEND_PTR_STACK_NUM_ARGS 3
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ZEND_PTR_STACK_RESIZE_IF_NEEDED(stack, ZEND_PTR_STACK_NUM_ARGS)
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stack->top += ZEND_PTR_STACK_NUM_ARGS;
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*(stack->top_element++) = a;
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*(stack->top_element++) = b;
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*(stack->top_element++) = c;
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#undef ZEND_PTR_STACK_NUM_ARGS
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}
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static zend_always_inline void zend_ptr_stack_2_push(zend_ptr_stack *stack, void *a, void *b)
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{
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#define ZEND_PTR_STACK_NUM_ARGS 2
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ZEND_PTR_STACK_RESIZE_IF_NEEDED(stack, ZEND_PTR_STACK_NUM_ARGS)
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stack->top += ZEND_PTR_STACK_NUM_ARGS;
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*(stack->top_element++) = a;
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*(stack->top_element++) = b;
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#undef ZEND_PTR_STACK_NUM_ARGS
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}
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static zend_always_inline void zend_ptr_stack_3_pop(zend_ptr_stack *stack, void **a, void **b, void **c)
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{
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*a = *(--stack->top_element);
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*b = *(--stack->top_element);
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*c = *(--stack->top_element);
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stack->top -= 3;
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}
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static zend_always_inline void zend_ptr_stack_2_pop(zend_ptr_stack *stack, void **a, void **b)
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{
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*a = *(--stack->top_element);
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*b = *(--stack->top_element);
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stack->top -= 2;
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}
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static zend_always_inline void zend_ptr_stack_push(zend_ptr_stack *stack, void *ptr)
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{
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ZEND_PTR_STACK_RESIZE_IF_NEEDED(stack, 1)
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stack->top++;
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*(stack->top_element++) = ptr;
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}
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static zend_always_inline void *zend_ptr_stack_pop(zend_ptr_stack *stack)
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{
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stack->top--;
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return *(--stack->top_element);
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}
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static zend_always_inline void *zend_ptr_stack_top(zend_ptr_stack *stack)
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{
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return stack->elements[stack->top - 1];
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}
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#endif /* ZEND_PTR_STACK_H */
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/*
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* indent-tabs-mode: t
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* End:
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* vim600: sw=4 ts=4 fdm=marker
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* vim<600: sw=4 ts=4
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*/
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