| 1 | /* $Id: VDScriptAst.cpp 82968 2020-02-04 10:35:17Z vboxsync $ */
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| 2 | /** @file
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| 3 | * VBox HDD container test utility - scripting engine AST node related functions.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2013-2020 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | */
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| 17 | #define LOGGROUP LOGGROUP_DEFAULT
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| 18 | #include <iprt/list.h>
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| 19 | #include <iprt/mem.h>
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| 20 | #include <iprt/assert.h>
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| 21 | #include <iprt/string.h>
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| 22 |
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| 23 | #include <VBox/log.h>
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| 24 |
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| 25 | #include "VDScriptAst.h"
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| 26 |
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| 27 | /**
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| 28 | * Put all child nodes of the given expression AST node onto the given to free list.
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| 29 | *
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| 30 | * @returns nothing.
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| 31 | * @param pList The free list to append everything to.
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| 32 | * @param pAstNode The expression node to free.
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| 33 | */
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| 34 | static void vdScriptAstNodeExpressionPutOnFreeList(PRTLISTANCHOR pList, PVDSCRIPTASTCORE pAstNode)
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| 35 | {
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| 36 | AssertMsgReturnVoid(pAstNode->enmClass == VDSCRIPTASTCLASS_EXPRESSION,
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| 37 | ("Given AST node is not a statement\n"));
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| 38 |
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| 39 | PVDSCRIPTASTEXPR pExpr = (PVDSCRIPTASTEXPR)pAstNode;
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| 40 | switch (pExpr->enmType)
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| 41 | {
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| 42 | case VDSCRIPTEXPRTYPE_PRIMARY_NUMCONST:
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| 43 | case VDSCRIPTEXPRTYPE_PRIMARY_BOOLEAN:
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| 44 | break;
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| 45 | case VDSCRIPTEXPRTYPE_PRIMARY_STRINGCONST:
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| 46 | RTStrFree((char *)pExpr->pszStr);
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| 47 | break;
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| 48 | case VDSCRIPTEXPRTYPE_PRIMARY_IDENTIFIER:
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| 49 | {
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| 50 | RTListAppend(pList, &pExpr->pIde->Core.ListNode);
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| 51 | break;
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| 52 | }
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| 53 | case VDSCRIPTEXPRTYPE_ASSIGNMENT_LIST:
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| 54 | {
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| 55 | while (!RTListIsEmpty(&pExpr->ListExpr))
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| 56 | {
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| 57 | PVDSCRIPTASTCORE pNode = RTListGetFirst(&pExpr->ListExpr, VDSCRIPTASTCORE, ListNode);
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| 58 | RTListNodeRemove(&pNode->ListNode);
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| 59 | RTListAppend(pList, &pNode->ListNode);
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| 60 | }
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| 61 | break;
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| 62 | }
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| 63 | case VDSCRIPTEXPRTYPE_POSTFIX_FNCALL:
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| 64 | {
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| 65 | RTListAppend(pList, &pExpr->FnCall.pFnIde->Core.ListNode);
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| 66 | while (!RTListIsEmpty(&pExpr->FnCall.ListArgs))
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| 67 | {
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| 68 | PVDSCRIPTASTCORE pNode = RTListGetFirst(&pExpr->FnCall.ListArgs, VDSCRIPTASTCORE, ListNode);
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| 69 | RTListNodeRemove(&pNode->ListNode);
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| 70 | RTListAppend(pList, &pNode->ListNode);
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| 71 | }
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| 72 | break;
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| 73 | }
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| 74 | case VDSCRIPTEXPRTYPE_POSTFIX_DEREFERENCE:
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| 75 | case VDSCRIPTEXPRTYPE_POSTFIX_DOT:
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| 76 | {
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| 77 | RTListAppend(pList, &pExpr->Deref.pIde->Core.ListNode);
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| 78 | RTListAppend(pList, &pExpr->Deref.pExpr->Core.ListNode);
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| 79 | break;
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| 80 | }
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| 81 | case VDSCRIPTEXPRTYPE_POSTFIX_INCREMENT:
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| 82 | case VDSCRIPTEXPRTYPE_POSTFIX_DECREMENT:
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| 83 | case VDSCRIPTEXPRTYPE_UNARY_INCREMENT:
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| 84 | case VDSCRIPTEXPRTYPE_UNARY_DECREMENT:
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| 85 | case VDSCRIPTEXPRTYPE_UNARY_POSSIGN:
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| 86 | case VDSCRIPTEXPRTYPE_UNARY_NEGSIGN:
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| 87 | case VDSCRIPTEXPRTYPE_UNARY_INVERT:
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| 88 | case VDSCRIPTEXPRTYPE_UNARY_NEGATE:
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| 89 | case VDSCRIPTEXPRTYPE_UNARY_REFERENCE:
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| 90 | case VDSCRIPTEXPRTYPE_UNARY_DEREFERENCE:
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| 91 | {
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| 92 | RTListAppend(pList, &pExpr->pExpr->Core.ListNode);
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| 93 | break;
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| 94 | }
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| 95 | case VDSCRIPTEXPRTYPE_MULTIPLICATION:
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| 96 | case VDSCRIPTEXPRTYPE_DIVISION:
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| 97 | case VDSCRIPTEXPRTYPE_MODULUS:
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| 98 | case VDSCRIPTEXPRTYPE_ADDITION:
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| 99 | case VDSCRIPTEXPRTYPE_SUBTRACTION:
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| 100 | case VDSCRIPTEXPRTYPE_LSR:
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| 101 | case VDSCRIPTEXPRTYPE_LSL:
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| 102 | case VDSCRIPTEXPRTYPE_LOWER:
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| 103 | case VDSCRIPTEXPRTYPE_HIGHER:
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| 104 | case VDSCRIPTEXPRTYPE_LOWEREQUAL:
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| 105 | case VDSCRIPTEXPRTYPE_HIGHEREQUAL:
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| 106 | case VDSCRIPTEXPRTYPE_EQUAL:
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| 107 | case VDSCRIPTEXPRTYPE_NOTEQUAL:
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| 108 | case VDSCRIPTEXPRTYPE_BITWISE_AND:
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| 109 | case VDSCRIPTEXPRTYPE_BITWISE_XOR:
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| 110 | case VDSCRIPTEXPRTYPE_BITWISE_OR:
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| 111 | case VDSCRIPTEXPRTYPE_LOGICAL_AND:
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| 112 | case VDSCRIPTEXPRTYPE_LOGICAL_OR:
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| 113 | case VDSCRIPTEXPRTYPE_ASSIGN:
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| 114 | case VDSCRIPTEXPRTYPE_ASSIGN_MULT:
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| 115 | case VDSCRIPTEXPRTYPE_ASSIGN_DIV:
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| 116 | case VDSCRIPTEXPRTYPE_ASSIGN_MOD:
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| 117 | case VDSCRIPTEXPRTYPE_ASSIGN_ADD:
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| 118 | case VDSCRIPTEXPRTYPE_ASSIGN_SUB:
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| 119 | case VDSCRIPTEXPRTYPE_ASSIGN_LSL:
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| 120 | case VDSCRIPTEXPRTYPE_ASSIGN_LSR:
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| 121 | case VDSCRIPTEXPRTYPE_ASSIGN_AND:
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| 122 | case VDSCRIPTEXPRTYPE_ASSIGN_XOR:
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| 123 | case VDSCRIPTEXPRTYPE_ASSIGN_OR:
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| 124 | {
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| 125 | RTListAppend(pList, &pExpr->BinaryOp.pLeftExpr->Core.ListNode);
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| 126 | RTListAppend(pList, &pExpr->BinaryOp.pRightExpr->Core.ListNode);
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| 127 | break;
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| 128 | }
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| 129 | case VDSCRIPTEXPRTYPE_INVALID:
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| 130 | default:
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| 131 | AssertMsgFailedReturnVoid(("Invalid AST node expression type %d\n",
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| 132 | pExpr->enmType));
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| 133 | }
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| 134 | }
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| 135 |
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| 136 | /**
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| 137 | * Free a given statement AST node and put everything on the given to free list.
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| 138 | *
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| 139 | * @returns nothing.
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| 140 | * @param pList The free list to append everything to.
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| 141 | * @param pAstNode The statement node to free.
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| 142 | */
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| 143 | static void vdScriptAstNodeStatmentPutOnFreeList(PRTLISTANCHOR pList, PVDSCRIPTASTCORE pAstNode)
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| 144 | {
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| 145 | AssertMsgReturnVoid(pAstNode->enmClass == VDSCRIPTASTCLASS_STATEMENT,
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| 146 | ("Given AST node is not a statement\n"));
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| 147 |
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| 148 | PVDSCRIPTASTSTMT pStmt = (PVDSCRIPTASTSTMT)pAstNode;
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| 149 | switch (pStmt->enmStmtType)
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| 150 | {
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| 151 | case VDSCRIPTSTMTTYPE_COMPOUND:
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| 152 | {
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| 153 | /* Put all declarations on the to free list. */
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| 154 | while (!RTListIsEmpty(&pStmt->Compound.ListDecls))
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| 155 | {
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| 156 | PVDSCRIPTASTCORE pNode = RTListGetFirst(&pStmt->Compound.ListDecls, VDSCRIPTASTCORE, ListNode);
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| 157 | RTListNodeRemove(&pNode->ListNode);
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| 158 | RTListAppend(pList, &pNode->ListNode);
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| 159 | }
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| 160 |
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| 161 | /* Put all statements on the to free list. */
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| 162 | while (!RTListIsEmpty(&pStmt->Compound.ListStmts))
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| 163 | {
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| 164 | PVDSCRIPTASTCORE pNode = RTListGetFirst(&pStmt->Compound.ListStmts, VDSCRIPTASTCORE, ListNode);
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| 165 | RTListNodeRemove(&pNode->ListNode);
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| 166 | RTListAppend(pList, &pNode->ListNode);
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| 167 | }
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| 168 | break;
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| 169 | }
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| 170 | case VDSCRIPTSTMTTYPE_EXPRESSION:
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| 171 | {
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| 172 | if (pStmt->pExpr)
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| 173 | RTListAppend(pList, &pStmt->pExpr->Core.ListNode);
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| 174 | break;
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| 175 | }
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| 176 | case VDSCRIPTSTMTTYPE_IF:
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| 177 | {
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| 178 | RTListAppend(pList, &pStmt->If.pCond->Core.ListNode);
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| 179 | RTListAppend(pList, &pStmt->If.pTrueStmt->Core.ListNode);
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| 180 | if (pStmt->If.pElseStmt)
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| 181 | RTListAppend(pList, &pStmt->If.pElseStmt->Core.ListNode);
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| 182 | break;
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| 183 | }
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| 184 | case VDSCRIPTSTMTTYPE_SWITCH:
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| 185 | {
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| 186 | RTListAppend(pList, &pStmt->Switch.pCond->Core.ListNode);
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| 187 | RTListAppend(pList, &pStmt->Switch.pStmt->Core.ListNode);
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| 188 | break;
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| 189 | }
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| 190 | case VDSCRIPTSTMTTYPE_WHILE:
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| 191 | {
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| 192 | RTListAppend(pList, &pStmt->While.pCond->Core.ListNode);
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| 193 | RTListAppend(pList, &pStmt->While.pStmt->Core.ListNode);
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| 194 | break;
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| 195 | }
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| 196 | case VDSCRIPTSTMTTYPE_FOR:
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| 197 | {
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| 198 | RTListAppend(pList, &pStmt->For.pExprStart->Core.ListNode);
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| 199 | RTListAppend(pList, &pStmt->For.pExprCond->Core.ListNode);
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| 200 | RTListAppend(pList, &pStmt->For.pExpr3->Core.ListNode);
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| 201 | RTListAppend(pList, &pStmt->For.pStmt->Core.ListNode);
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| 202 | break;
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| 203 | }
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| 204 | case VDSCRIPTSTMTTYPE_RETURN:
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| 205 | {
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| 206 | if (pStmt->pExpr)
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| 207 | RTListAppend(pList, &pStmt->pExpr->Core.ListNode);
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| 208 | break;
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| 209 | }
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| 210 | case VDSCRIPTSTMTTYPE_CASE:
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| 211 | {
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| 212 | RTListAppend(pList, &pStmt->Case.pExpr->Core.ListNode);
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| 213 | RTListAppend(pList, &pStmt->Case.pStmt->Core.ListNode);
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| 214 | break;
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| 215 | }
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| 216 | case VDSCRIPTSTMTTYPE_DEFAULT:
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| 217 | {
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| 218 | RTListAppend(pList, &pStmt->Case.pStmt->Core.ListNode);
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| 219 | break;
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| 220 | }
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| 221 | case VDSCRIPTSTMTTYPE_CONTINUE:
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| 222 | case VDSCRIPTSTMTTYPE_BREAK:
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| 223 | break;
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| 224 | case VDSCRIPTSTMTTYPE_INVALID:
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| 225 | default:
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| 226 | AssertMsgFailedReturnVoid(("Invalid AST node statement type %d\n",
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| 227 | pStmt->enmStmtType));
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| 228 | }
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| 229 | }
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| 230 |
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| 231 | DECLHIDDEN(void) vdScriptAstNodeFree(PVDSCRIPTASTCORE pAstNode)
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| 232 | {
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| 233 | RTLISTANCHOR ListFree;
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| 234 |
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| 235 | /*
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| 236 | * The node is not allowed to be part of a list because we need it
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| 237 | * for the nodes to free list.
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| 238 | */
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| 239 | Assert(RTListIsEmpty(&pAstNode->ListNode));
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| 240 | RTListInit(&ListFree);
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| 241 | RTListAppend(&ListFree, &pAstNode->ListNode);
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| 242 |
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| 243 | do
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| 244 | {
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| 245 | pAstNode = RTListGetFirst(&ListFree, VDSCRIPTASTCORE, ListNode);
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| 246 | RTListNodeRemove(&pAstNode->ListNode);
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| 247 |
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| 248 | switch (pAstNode->enmClass)
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| 249 | {
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| 250 | case VDSCRIPTASTCLASS_FUNCTION:
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| 251 | {
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| 252 | PVDSCRIPTASTFN pFn = (PVDSCRIPTASTFN)pAstNode;
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| 253 |
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| 254 | if (pFn->pRetType)
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| 255 | RTListAppend(&ListFree, &pFn->pRetType->Core.ListNode);
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| 256 | if (pFn->pFnIde)
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| 257 | RTListAppend(&ListFree, &pFn->pFnIde->Core.ListNode);
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| 258 |
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| 259 | /* Put argument list on the to free list. */
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| 260 | while (!RTListIsEmpty(&pFn->ListArgs))
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| 261 | {
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| 262 | PVDSCRIPTASTCORE pArg = RTListGetFirst(&pFn->ListArgs, VDSCRIPTASTCORE, ListNode);
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| 263 | RTListNodeRemove(&pArg->ListNode);
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| 264 | RTListAppend(&ListFree, &pArg->ListNode);
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| 265 | }
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| 266 |
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| 267 | /* Put compound statement onto the list. */
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| 268 | RTListAppend(&ListFree, &pFn->pCompoundStmts->Core.ListNode);
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| 269 | break;
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| 270 | }
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| 271 | case VDSCRIPTASTCLASS_FUNCTIONARG:
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| 272 | {
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| 273 | PVDSCRIPTASTFNARG pAstNodeArg = (PVDSCRIPTASTFNARG)pAstNode;
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| 274 | if (pAstNodeArg->pType)
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| 275 | RTListAppend(&ListFree, &pAstNodeArg->pType->Core.ListNode);
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| 276 | if (pAstNodeArg->pArgIde)
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| 277 | RTListAppend(&ListFree, &pAstNodeArg->pArgIde->Core.ListNode);
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| 278 | break;
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| 279 | }
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| 280 | case VDSCRIPTASTCLASS_IDENTIFIER:
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| 281 | break;
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| 282 | case VDSCRIPTASTCLASS_DECLARATION:
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| 283 | case VDSCRIPTASTCLASS_TYPENAME:
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| 284 | {
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| 285 | AssertMsgFailed(("TODO\n"));
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| 286 | break;
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| 287 | }
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| 288 | case VDSCRIPTASTCLASS_STATEMENT:
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| 289 | {
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| 290 | vdScriptAstNodeStatmentPutOnFreeList(&ListFree, pAstNode);
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| 291 | break;
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| 292 | }
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| 293 | case VDSCRIPTASTCLASS_EXPRESSION:
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| 294 | {
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| 295 | vdScriptAstNodeExpressionPutOnFreeList(&ListFree, pAstNode);
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| 296 | break;
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| 297 | }
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| 298 | case VDSCRIPTASTCLASS_INVALID:
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| 299 | default:
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| 300 | AssertMsgFailedReturnVoid(("Invalid AST node class given %d\n", pAstNode->enmClass));
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| 301 | }
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| 302 |
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| 303 | RTMemFree(pAstNode);
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| 304 | } while (!RTListIsEmpty(&ListFree));
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| 305 |
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| 306 | }
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| 307 |
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| 308 | DECLHIDDEN(PVDSCRIPTASTCORE) vdScriptAstNodeAlloc(VDSCRIPTASTCLASS enmClass)
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| 309 | {
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| 310 | size_t cbAlloc = 0;
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| 311 |
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| 312 | switch (enmClass)
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| 313 | {
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| 314 | case VDSCRIPTASTCLASS_FUNCTION:
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| 315 | cbAlloc = sizeof(VDSCRIPTASTFN);
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| 316 | break;
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| 317 | case VDSCRIPTASTCLASS_FUNCTIONARG:
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| 318 | cbAlloc = sizeof(VDSCRIPTASTFNARG);
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| 319 | break;
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| 320 | case VDSCRIPTASTCLASS_DECLARATION:
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| 321 | cbAlloc = sizeof(VDSCRIPTASTDECL);
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| 322 | break;
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| 323 | case VDSCRIPTASTCLASS_STATEMENT:
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| 324 | cbAlloc = sizeof(VDSCRIPTASTSTMT);
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| 325 | break;
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| 326 | case VDSCRIPTASTCLASS_EXPRESSION:
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| 327 | cbAlloc = sizeof(VDSCRIPTASTEXPR);
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| 328 | break;
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| 329 | case VDSCRIPTASTCLASS_TYPENAME:
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| 330 | cbAlloc = sizeof(VDSCRIPTASTTYPENAME);
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| 331 | break;
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| 332 | case VDSCRIPTASTCLASS_IDENTIFIER:
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| 333 | case VDSCRIPTASTCLASS_INVALID:
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| 334 | default:
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| 335 | AssertMsgFailedReturn(("Invalid AST node class given %d\n", enmClass), NULL);
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| 336 | }
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| 337 |
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| 338 | PVDSCRIPTASTCORE pAstNode = (PVDSCRIPTASTCORE)RTMemAllocZ(cbAlloc);
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| 339 | if (pAstNode)
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| 340 | {
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| 341 | pAstNode->enmClass = enmClass;
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| 342 | RTListInit(&pAstNode->ListNode);
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| 343 | }
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| 344 |
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| 345 | return pAstNode;
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| 346 | }
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| 347 |
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| 348 | DECLHIDDEN(PVDSCRIPTASTIDE) vdScriptAstNodeIdeAlloc(size_t cchIde)
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| 349 | {
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| 350 | PVDSCRIPTASTIDE pAstNode = (PVDSCRIPTASTIDE)RTMemAllocZ(RT_UOFFSETOF_DYN(VDSCRIPTASTIDE, aszIde[cchIde + 1]));
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| 351 | if (pAstNode)
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| 352 | {
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| 353 | pAstNode->Core.enmClass = VDSCRIPTASTCLASS_IDENTIFIER;
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| 354 | RTListInit(&pAstNode->Core.ListNode);
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| 355 | }
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| 356 |
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| 357 | return pAstNode;
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| 358 | }
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