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/* +----------------------------------------------------------------------+ | Zend Engine | +----------------------------------------------------------------------+ | Copyright (c) 1998-2017 Zend Technologies Ltd. (http://www.zend.com) | +----------------------------------------------------------------------+ | This source file is subject to version 2.00 of the Zend license, | | that is bundled with this package in the file LICENSE, and is | | available through the world-wide-web at the following url: | | http://www.zend.com/license/2_00.txt. | | If you did not receive a copy of the Zend license and are unable to | | obtain it through the world-wide-web, please send a note to | | license@zend.com so we can mail you a copy immediately. | +----------------------------------------------------------------------+ | Authors: Bob Weinand <bwoebi@php.net> | | Dmitry Stogov <dmitry@zend.com> | | Nikita Popov <nikic@php.net> | +----------------------------------------------------------------------+ */ /* $Id$ */ #ifndef ZEND_AST_H #define ZEND_AST_H #include "zend.h" #define ZEND_AST_SPECIAL_SHIFT 6 #define ZEND_AST_IS_LIST_SHIFT 7 #define ZEND_AST_NUM_CHILDREN_SHIFT 8 enum _zend_ast_kind { /* special nodes */ ZEND_AST_ZVAL = 1 << ZEND_AST_SPECIAL_SHIFT, ZEND_AST_ZNODE, /* declaration nodes */ ZEND_AST_FUNC_DECL, ZEND_AST_CLOSURE, ZEND_AST_METHOD, ZEND_AST_CLASS, /* list nodes */ ZEND_AST_ARG_LIST = 1 << ZEND_AST_IS_LIST_SHIFT, ZEND_AST_LIST, ZEND_AST_ARRAY, ZEND_AST_ENCAPS_LIST, ZEND_AST_EXPR_LIST, ZEND_AST_STMT_LIST, ZEND_AST_IF, ZEND_AST_SWITCH_LIST, ZEND_AST_CATCH_LIST, ZEND_AST_PARAM_LIST, ZEND_AST_CLOSURE_USES, ZEND_AST_PROP_DECL, ZEND_AST_CONST_DECL, ZEND_AST_CLASS_CONST_DECL, ZEND_AST_NAME_LIST, ZEND_AST_TRAIT_ADAPTATIONS, ZEND_AST_USE, /* 0 child nodes */ ZEND_AST_MAGIC_CONST = 0 << ZEND_AST_NUM_CHILDREN_SHIFT, ZEND_AST_TYPE, /* 1 child node */ ZEND_AST_VAR = 1 << ZEND_AST_NUM_CHILDREN_SHIFT, ZEND_AST_CONST, ZEND_AST_UNPACK, ZEND_AST_UNARY_PLUS, ZEND_AST_UNARY_MINUS, ZEND_AST_CAST, ZEND_AST_EMPTY, ZEND_AST_ISSET, ZEND_AST_SILENCE, ZEND_AST_SHELL_EXEC, ZEND_AST_CLONE, ZEND_AST_EXIT, ZEND_AST_PRINT, ZEND_AST_INCLUDE_OR_EVAL, ZEND_AST_UNARY_OP, ZEND_AST_PRE_INC, ZEND_AST_PRE_DEC, ZEND_AST_POST_INC, ZEND_AST_POST_DEC, ZEND_AST_YIELD_FROM, ZEND_AST_GLOBAL, ZEND_AST_UNSET, ZEND_AST_RETURN, ZEND_AST_LABEL, ZEND_AST_REF, ZEND_AST_HALT_COMPILER, ZEND_AST_ECHO, ZEND_AST_THROW, ZEND_AST_GOTO, ZEND_AST_BREAK, ZEND_AST_CONTINUE, /* 2 child nodes */ ZEND_AST_DIM = 2 << ZEND_AST_NUM_CHILDREN_SHIFT, ZEND_AST_PROP, ZEND_AST_STATIC_PROP, ZEND_AST_CALL, ZEND_AST_CLASS_CONST, ZEND_AST_ASSIGN, ZEND_AST_ASSIGN_REF, ZEND_AST_ASSIGN_OP, ZEND_AST_BINARY_OP, ZEND_AST_GREATER, ZEND_AST_GREATER_EQUAL, ZEND_AST_AND, ZEND_AST_OR, ZEND_AST_ARRAY_ELEM, ZEND_AST_NEW, ZEND_AST_INSTANCEOF, ZEND_AST_YIELD, ZEND_AST_COALESCE, ZEND_AST_STATIC, ZEND_AST_WHILE, ZEND_AST_DO_WHILE, ZEND_AST_IF_ELEM, ZEND_AST_SWITCH, ZEND_AST_SWITCH_CASE, ZEND_AST_DECLARE, ZEND_AST_CONST_ELEM, ZEND_AST_USE_TRAIT, ZEND_AST_TRAIT_PRECEDENCE, ZEND_AST_METHOD_REFERENCE, ZEND_AST_NAMESPACE, ZEND_AST_USE_ELEM, ZEND_AST_TRAIT_ALIAS, ZEND_AST_GROUP_USE, /* 3 child nodes */ ZEND_AST_METHOD_CALL = 3 << ZEND_AST_NUM_CHILDREN_SHIFT, ZEND_AST_STATIC_CALL, ZEND_AST_CONDITIONAL, ZEND_AST_TRY, ZEND_AST_CATCH, ZEND_AST_PARAM, ZEND_AST_PROP_ELEM, /* 4 child nodes */ ZEND_AST_FOR = 4 << ZEND_AST_NUM_CHILDREN_SHIFT, ZEND_AST_FOREACH, }; typedef uint16_t zend_ast_kind; typedef uint16_t zend_ast_attr; struct _zend_ast { zend_ast_kind kind; /* Type of the node (ZEND_AST_* enum constant) */ zend_ast_attr attr; /* Additional attribute, use depending on node type */ uint32_t lineno; /* Line number */ zend_ast *child[1]; /* Array of children (using struct hack) */ }; /* Same as zend_ast, but with children count, which is updated dynamically */ typedef struct _zend_ast_list { zend_ast_kind kind; zend_ast_attr attr; uint32_t lineno; uint32_t children; zend_ast *child[1]; } zend_ast_list; /* Lineno is stored in val.u2.lineno */ typedef struct _zend_ast_zval { zend_ast_kind kind; zend_ast_attr attr; zval val; } zend_ast_zval; /* Separate structure for function and class declaration, as they need extra information. */ typedef struct _zend_ast_decl { zend_ast_kind kind; zend_ast_attr attr; /* Unused - for structure compatibility */ uint32_t start_lineno; uint32_t end_lineno; uint32_t flags; unsigned char *lex_pos; zend_string *doc_comment; zend_string *name; zend_ast *child[4]; } zend_ast_decl; typedef void (*zend_ast_process_t)(zend_ast *ast); extern ZEND_API zend_ast_process_t zend_ast_process; ZEND_API zend_ast *zend_ast_create_zval_with_lineno(zval *zv, zend_ast_attr attr, uint32_t lineno); ZEND_API zend_ast *zend_ast_create_zval_ex(zval *zv, zend_ast_attr attr); ZEND_API zend_ast *zend_ast_create_ex(zend_ast_kind kind, zend_ast_attr attr, ...); ZEND_API zend_ast *zend_ast_create(zend_ast_kind kind, ...); ZEND_API zend_ast *zend_ast_create_decl( zend_ast_kind kind, uint32_t flags, uint32_t start_lineno, zend_string *doc_comment, zend_string *name, zend_ast *child0, zend_ast *child1, zend_ast *child2, zend_ast *child3 ); ZEND_API zend_ast *zend_ast_create_list(uint32_t init_children, zend_ast_kind kind, ...); ZEND_API zend_ast *zend_ast_list_add(zend_ast *list, zend_ast *op); ZEND_API int zend_ast_evaluate(zval *result, zend_ast *ast, zend_class_entry *scope); ZEND_API zend_string *zend_ast_export(const char *prefix, zend_ast *ast, const char *suffix); ZEND_API zend_ast *zend_ast_copy(zend_ast *ast); ZEND_API void zend_ast_destroy(zend_ast *ast); ZEND_API void zend_ast_destroy_and_free(zend_ast *ast); typedef void (*zend_ast_apply_func)(zend_ast **ast_ptr); ZEND_API void zend_ast_apply(zend_ast *ast, zend_ast_apply_func fn); static zend_always_inline zend_bool zend_ast_is_list(zend_ast *ast) { return (ast->kind >> ZEND_AST_IS_LIST_SHIFT) & 1; } static zend_always_inline zend_ast_list *zend_ast_get_list(zend_ast *ast) { ZEND_ASSERT(zend_ast_is_list(ast)); return (zend_ast_list *) ast; } static zend_always_inline zval *zend_ast_get_zval(zend_ast *ast) { ZEND_ASSERT(ast->kind == ZEND_AST_ZVAL); return &((zend_ast_zval *) ast)->val; } static zend_always_inline zend_string *zend_ast_get_str(zend_ast *ast) { zval *zv = zend_ast_get_zval(ast); ZEND_ASSERT(Z_TYPE_P(zv) == IS_STRING); return Z_STR_P(zv); } static zend_always_inline uint32_t zend_ast_get_num_children(zend_ast *ast) { ZEND_ASSERT(!zend_ast_is_list(ast)); return ast->kind >> ZEND_AST_NUM_CHILDREN_SHIFT; } static zend_always_inline uint32_t zend_ast_get_lineno(zend_ast *ast) { if (ast->kind == ZEND_AST_ZVAL) { zval *zv = zend_ast_get_zval(ast); return zv->u2.lineno; } else { return ast->lineno; } } static zend_always_inline zend_ast *zend_ast_create_zval(zval *zv) { return zend_ast_create_zval_ex(zv, 0); } static zend_always_inline zend_ast *zend_ast_create_zval_from_str(zend_string *str) { zval zv; ZVAL_STR(&zv, str); return zend_ast_create_zval(&zv); } static zend_always_inline zend_ast *zend_ast_create_zval_from_long(zend_long lval) { zval zv; ZVAL_LONG(&zv, lval); return zend_ast_create_zval(&zv); } static zend_always_inline zend_ast *zend_ast_create_binary_op(uint32_t opcode, zend_ast *op0, zend_ast *op1) { return zend_ast_create_ex(ZEND_AST_BINARY_OP, opcode, op0, op1); } static zend_always_inline zend_ast *zend_ast_create_assign_op(uint32_t opcode, zend_ast *op0, zend_ast *op1) { return zend_ast_create_ex(ZEND_AST_ASSIGN_OP, opcode, op0, op1); } static zend_always_inline zend_ast *zend_ast_create_cast(uint32_t type, zend_ast *op0) { return zend_ast_create_ex(ZEND_AST_CAST, type, op0); } #endif