[42527] | 1 | /* $Id: VBoxAutostartCfg.cpp 73097 2018-07-12 21:06:33Z vboxsync $ */
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| 2 | /** @file
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| 3 | * VBoxAutostart - VirtualBox Autostart service, configuration parser.
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| 4 | */
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| 5 |
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| 6 | /*
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[69500] | 7 | * Copyright (C) 2012-2017 Oracle Corporation
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[42527] | 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 |
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| 18 |
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[57358] | 19 | /*********************************************************************************************************************************
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| 20 | * Header Files *
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| 21 | *********************************************************************************************************************************/
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| 22 |
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[42527] | 23 | #include <iprt/stream.h>
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| 24 | #include <iprt/process.h>
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| 25 | #include <iprt/string.h>
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| 26 | #include <iprt/mem.h>
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| 27 | #include <iprt/ctype.h>
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| 28 | #include <iprt/message.h>
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| 29 |
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| 30 | #include "VBoxAutostart.h"
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| 31 |
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| 32 |
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[57358] | 33 | /*********************************************************************************************************************************
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| 34 | * Constants And Macros, Structures and Typedefs *
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| 35 | *********************************************************************************************************************************/
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| 36 |
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[42527] | 37 | /**
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[42732] | 38 | * Token type.
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| 39 | */
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| 40 | typedef enum CFGTOKENTYPE
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| 41 | {
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| 42 | /** Invalid token type. */
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| 43 | CFGTOKENTYPE_INVALID = 0,
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| 44 | /** Identifier. */
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| 45 | CFGTOKENTYPE_ID,
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| 46 | /** Comma. */
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| 47 | CFGTOKENTYPE_COMMA,
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| 48 | /** Equal sign. */
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| 49 | CFGTOKENTYPE_EQUAL,
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| 50 | /** Open curly brackets. */
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| 51 | CFGTOKENTYPE_CURLY_OPEN,
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| 52 | /** Closing curly brackets. */
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| 53 | CFGTOKENTYPE_CURLY_CLOSING,
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| 54 | /** End of file. */
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| 55 | CFGTOKENTYPE_EOF,
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| 56 | /** 32bit hack. */
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| 57 | CFGTOKENTYPE_32BIT_HACK = 0x7fffffff
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| 58 | } CFGTOKENTYPE;
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| 59 | /** Pointer to a token type. */
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| 60 | typedef CFGTOKENTYPE *PCFGTOKENTYPE;
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| 61 | /** Pointer to a const token type. */
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| 62 | typedef const CFGTOKENTYPE *PCCFGTOKENTYPE;
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| 63 |
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| 64 | /**
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| 65 | * A token.
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| 66 | */
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| 67 | typedef struct CFGTOKEN
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| 68 | {
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| 69 | /** Type of the token. */
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| 70 | CFGTOKENTYPE enmType;
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| 71 | /** Line number of the token. */
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| 72 | unsigned iLine;
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| 73 | /** Starting character of the token in the stream. */
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[63289] | 74 | size_t cchStart;
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[42732] | 75 | /** Type dependen token data. */
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| 76 | union
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| 77 | {
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| 78 | /** Data for the ID type. */
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| 79 | struct
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| 80 | {
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| 81 | /** Size of the id in characters, excluding the \0 terminator. */
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| 82 | size_t cchToken;
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| 83 | /** Token data, variable size (given by cchToken member). */
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| 84 | char achToken[1];
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| 85 | } Id;
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| 86 | } u;
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| 87 | } CFGTOKEN;
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| 88 | /** Pointer to a token. */
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| 89 | typedef CFGTOKEN *PCFGTOKEN;
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| 90 | /** Pointer to a const token. */
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| 91 | typedef const CFGTOKEN *PCCFGTOKEN;
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| 92 |
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| 93 | /**
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[42527] | 94 | * Tokenizer instance data for the config data.
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| 95 | */
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| 96 | typedef struct CFGTOKENIZER
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| 97 | {
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| 98 | /** Config file handle. */
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| 99 | PRTSTREAM hStrmConfig;
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| 100 | /** String buffer for the current line we are operating in. */
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| 101 | char *pszLine;
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| 102 | /** Size of the string buffer. */
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| 103 | size_t cbLine;
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| 104 | /** Current position in the line. */
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| 105 | char *pszLineCurr;
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| 106 | /** Current line in the config file. */
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| 107 | unsigned iLine;
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[42732] | 108 | /** Current character of the line. */
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[63289] | 109 | size_t cchCurr;
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[42732] | 110 | /** Flag whether the end of the config stream is reached. */
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| 111 | bool fEof;
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| 112 | /** Pointer to the next token in the stream (used to peek). */
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| 113 | PCFGTOKEN pTokenNext;
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[42527] | 114 | } CFGTOKENIZER, *PCFGTOKENIZER;
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| 115 |
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| 116 |
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[57358] | 117 | /*********************************************************************************************************************************
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| 118 | * Internal Functions *
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| 119 | *********************************************************************************************************************************/
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| 120 |
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[42527] | 121 | /**
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[42732] | 122 | * Free a config token.
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| 123 | *
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| 124 | * @returns nothing.
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| 125 | * @param pCfgTokenizer The config tokenizer.
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| 126 | * @param pToken The token to free.
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| 127 | */
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| 128 | static void autostartConfigTokenFree(PCFGTOKENIZER pCfgTokenizer, PCFGTOKEN pToken)
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| 129 | {
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| 130 | NOREF(pCfgTokenizer);
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| 131 | RTMemFree(pToken);
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| 132 | }
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| 133 |
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| 134 | /**
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[42527] | 135 | * Reads the next line from the config stream.
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| 136 | *
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| 137 | * @returns VBox status code.
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| 138 | * @param pCfgTokenizer The config tokenizer.
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| 139 | */
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| 140 | static int autostartConfigTokenizerReadNextLine(PCFGTOKENIZER pCfgTokenizer)
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| 141 | {
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| 142 | int rc = VINF_SUCCESS;
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| 143 |
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[42732] | 144 | if (pCfgTokenizer->fEof)
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| 145 | return VERR_EOF;
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| 146 |
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[42527] | 147 | do
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| 148 | {
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| 149 | rc = RTStrmGetLine(pCfgTokenizer->hStrmConfig, pCfgTokenizer->pszLine,
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| 150 | pCfgTokenizer->cbLine);
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| 151 | if (rc == VERR_BUFFER_OVERFLOW)
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| 152 | {
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| 153 | char *pszTmp;
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| 154 |
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| 155 | pCfgTokenizer->cbLine += 128;
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| 156 | pszTmp = (char *)RTMemRealloc(pCfgTokenizer->pszLine, pCfgTokenizer->cbLine);
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| 157 | if (pszTmp)
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| 158 | pCfgTokenizer->pszLine = pszTmp;
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| 159 | else
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| 160 | rc = VERR_NO_MEMORY;
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| 161 | }
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| 162 | } while (rc == VERR_BUFFER_OVERFLOW);
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| 163 |
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[42732] | 164 | if ( RT_SUCCESS(rc)
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| 165 | || rc == VERR_EOF)
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[42527] | 166 | {
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| 167 | pCfgTokenizer->iLine++;
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[42732] | 168 | pCfgTokenizer->cchCurr = 1;
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[42527] | 169 | pCfgTokenizer->pszLineCurr = pCfgTokenizer->pszLine;
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[42732] | 170 | if (rc == VERR_EOF)
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| 171 | pCfgTokenizer->fEof = true;
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[42527] | 172 | }
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| 173 |
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| 174 | return rc;
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| 175 | }
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| 176 |
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| 177 | /**
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[42732] | 178 | * Get the next token from the config stream and create a token structure.
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| 179 | *
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| 180 | * @returns VBox status code.
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| 181 | * @param pCfgTokenizer The config tokenizer data.
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| 182 | * @param pCfgTokenUse Allocated token structure to use or NULL to allocate
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| 183 | * a new one. It will bee freed if an error is encountered.
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| 184 | * @param ppCfgToken Where to store the pointer to the next token on success.
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| 185 | */
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| 186 | static int autostartConfigTokenizerCreateToken(PCFGTOKENIZER pCfgTokenizer,
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| 187 | PCFGTOKEN pCfgTokenUse, PCFGTOKEN *ppCfgToken)
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| 188 | {
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| 189 | const char *pszToken = NULL;
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| 190 | size_t cchToken = 1;
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| 191 | size_t cchAdvance = 0;
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| 192 | CFGTOKENTYPE enmType = CFGTOKENTYPE_INVALID;
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| 193 | int rc = VINF_SUCCESS;
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| 194 |
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| 195 | for (;;)
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| 196 | {
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| 197 | pszToken = pCfgTokenizer->pszLineCurr;
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| 198 |
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| 199 | /* Skip all spaces. */
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| 200 | while (RT_C_IS_BLANK(*pszToken))
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| 201 | {
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| 202 | pszToken++;
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| 203 | cchAdvance++;
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| 204 | }
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| 205 |
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| 206 | /* Check if we have to read a new line. */
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| 207 | if ( *pszToken == '\0'
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| 208 | || *pszToken == '#')
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| 209 | {
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| 210 | rc = autostartConfigTokenizerReadNextLine(pCfgTokenizer);
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| 211 | if (rc == VERR_EOF)
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| 212 | {
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| 213 | enmType = CFGTOKENTYPE_EOF;
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| 214 | rc = VINF_SUCCESS;
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| 215 | break;
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| 216 | }
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| 217 | else if (RT_FAILURE(rc))
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| 218 | break;
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| 219 | /* start from the beginning. */
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| 220 | cchAdvance = 0;
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| 221 | }
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| 222 | else if (*pszToken == '=')
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| 223 | {
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| 224 | enmType = CFGTOKENTYPE_EQUAL;
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| 225 | break;
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| 226 | }
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| 227 | else if (*pszToken == ',')
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| 228 | {
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| 229 | enmType = CFGTOKENTYPE_COMMA;
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| 230 | break;
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| 231 | }
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| 232 | else if (*pszToken == '{')
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| 233 | {
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| 234 | enmType = CFGTOKENTYPE_CURLY_OPEN;
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| 235 | break;
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| 236 | }
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| 237 | else if (*pszToken == '}')
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| 238 | {
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| 239 | enmType = CFGTOKENTYPE_CURLY_CLOSING;
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| 240 | break;
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| 241 | }
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| 242 | else
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| 243 | {
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| 244 | const char *pszTmp = pszToken;
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| 245 | cchToken = 0;
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| 246 | enmType = CFGTOKENTYPE_ID;
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| 247 |
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| 248 | /* Get the complete token. */
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| 249 | while ( RT_C_IS_ALNUM(*pszTmp)
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| 250 | || *pszTmp == '_'
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| 251 | || *pszTmp == '.')
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| 252 | {
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| 253 | pszTmp++;
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| 254 | cchToken++;
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| 255 | }
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| 256 | break;
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| 257 | }
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| 258 | }
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| 259 |
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| 260 | Assert(RT_FAILURE(rc) || enmType != CFGTOKENTYPE_INVALID);
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| 261 |
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| 262 | if (RT_SUCCESS(rc))
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| 263 | {
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| 264 | /* Free the given token if it is an ID or the current one is an ID token. */
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| 265 | if ( pCfgTokenUse
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| 266 | && ( pCfgTokenUse->enmType == CFGTOKENTYPE_ID
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| 267 | || enmType == CFGTOKENTYPE_ID))
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| 268 | {
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| 269 | autostartConfigTokenFree(pCfgTokenizer, pCfgTokenUse);
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| 270 | pCfgTokenUse = NULL;
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| 271 | }
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| 272 |
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| 273 | if (!pCfgTokenUse)
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| 274 | {
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| 275 | size_t cbToken = sizeof(CFGTOKEN);
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| 276 | if (enmType == CFGTOKENTYPE_ID)
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| 277 | cbToken += (cchToken + 1) * sizeof(char);
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| 278 |
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| 279 | pCfgTokenUse = (PCFGTOKEN)RTMemAllocZ(cbToken);
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| 280 | if (!pCfgTokenUse)
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| 281 | rc = VERR_NO_MEMORY;
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| 282 | }
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| 283 |
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| 284 | if (RT_SUCCESS(rc))
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| 285 | {
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| 286 | /* Copy token data. */
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| 287 | pCfgTokenUse->enmType = enmType;
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| 288 | pCfgTokenUse->cchStart = pCfgTokenizer->cchCurr;
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| 289 | pCfgTokenUse->iLine = pCfgTokenizer->iLine;
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| 290 | if (enmType == CFGTOKENTYPE_ID)
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| 291 | {
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| 292 | pCfgTokenUse->u.Id.cchToken = cchToken;
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| 293 | memcpy(pCfgTokenUse->u.Id.achToken, pszToken, cchToken);
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| 294 | }
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| 295 | }
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| 296 | else if (pCfgTokenUse)
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| 297 | autostartConfigTokenFree(pCfgTokenizer, pCfgTokenUse);
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| 298 |
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| 299 | if (RT_SUCCESS(rc))
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| 300 | {
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| 301 | /* Set new position in config stream. */
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| 302 | pCfgTokenizer->pszLineCurr += cchToken + cchAdvance;
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| 303 | pCfgTokenizer->cchCurr += cchToken + cchAdvance;
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| 304 | *ppCfgToken = pCfgTokenUse;
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| 305 | }
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| 306 | }
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| 307 |
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| 308 | return rc;
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| 309 | }
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| 310 |
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| 311 | /**
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| 312 | * Destroys the given config tokenizer.
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| 313 | *
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| 314 | * @returns nothing.
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| 315 | * @param pCfgTokenizer The config tokenizer to destroy.
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| 316 | */
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| 317 | static void autostartConfigTokenizerDestroy(PCFGTOKENIZER pCfgTokenizer)
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| 318 | {
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| 319 | if (pCfgTokenizer->pszLine)
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| 320 | RTMemFree(pCfgTokenizer->pszLine);
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| 321 | if (pCfgTokenizer->hStrmConfig)
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| 322 | RTStrmClose(pCfgTokenizer->hStrmConfig);
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| 323 | if (pCfgTokenizer->pTokenNext)
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| 324 | RTMemFree(pCfgTokenizer->pTokenNext);
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| 325 | RTMemFree(pCfgTokenizer);
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| 326 | }
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| 327 |
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| 328 | /**
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[42527] | 329 | * Creates the config tokenizer from the given filename.
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| 330 | *
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| 331 | * @returns VBox status code.
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| 332 | * @param pszFilename Config filename.
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| 333 | * @param ppCfgTokenizer Where to store the pointer to the config tokenizer on
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| 334 | * success.
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| 335 | */
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| 336 | static int autostartConfigTokenizerCreate(const char *pszFilename, PCFGTOKENIZER *ppCfgTokenizer)
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| 337 | {
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| 338 | int rc = VINF_SUCCESS;
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| 339 | PCFGTOKENIZER pCfgTokenizer = (PCFGTOKENIZER)RTMemAllocZ(sizeof(CFGTOKENIZER));
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| 340 |
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| 341 | if (pCfgTokenizer)
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| 342 | {
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[42732] | 343 | pCfgTokenizer->iLine = 0;
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[42527] | 344 | pCfgTokenizer->cbLine = 128;
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| 345 | pCfgTokenizer->pszLine = (char *)RTMemAllocZ(pCfgTokenizer->cbLine);
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| 346 | if (pCfgTokenizer->pszLine)
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| 347 | {
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| 348 | rc = RTStrmOpen(pszFilename, "r", &pCfgTokenizer->hStrmConfig);
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| 349 | if (RT_SUCCESS(rc))
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[42732] | 350 | {
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[42527] | 351 | rc = autostartConfigTokenizerReadNextLine(pCfgTokenizer);
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[42732] | 352 | if (RT_SUCCESS(rc))
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| 353 | rc = autostartConfigTokenizerCreateToken(pCfgTokenizer, NULL,
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| 354 | &pCfgTokenizer->pTokenNext);
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| 355 | }
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[42527] | 356 | }
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| 357 | else
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| 358 | rc = VERR_NO_MEMORY;
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| 359 | }
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| 360 | else
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| 361 | rc = VERR_NO_MEMORY;
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| 362 |
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| 363 | if (RT_SUCCESS(rc))
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| 364 | *ppCfgTokenizer = pCfgTokenizer;
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| 365 | else if ( RT_FAILURE(rc)
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| 366 | && pCfgTokenizer)
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[42732] | 367 | autostartConfigTokenizerDestroy(pCfgTokenizer);
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[42527] | 368 |
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| 369 | return rc;
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| 370 | }
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| 371 |
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| 372 | /**
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[42732] | 373 | * Return the next token from the config stream.
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[42527] | 374 | *
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[42732] | 375 | * @returns VBox status code.
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| 376 | * @param pCfgTokenizer The config tokenizer.
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| 377 | * @param ppCfgToken Where to store the next token.
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[42527] | 378 | */
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[42732] | 379 | static int autostartConfigTokenizerGetNextToken(PCFGTOKENIZER pCfgTokenizer,
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| 380 | PCFGTOKEN *ppCfgToken)
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[42527] | 381 | {
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[42732] | 382 | *ppCfgToken = pCfgTokenizer->pTokenNext;
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| 383 | return autostartConfigTokenizerCreateToken(pCfgTokenizer, NULL, &pCfgTokenizer->pTokenNext);
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[42527] | 384 | }
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| 385 |
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[46737] | 386 | /**
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| 387 | * Returns a stringified version of the token type.
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| 388 | *
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| 389 | * @returns Stringified version of the token type.
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| 390 | * @param enmType Token type.
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| 391 | */
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| 392 | static const char *autostartConfigTokenTypeToStr(CFGTOKENTYPE enmType)
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[42732] | 393 | {
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[46737] | 394 | switch (enmType)
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[42732] | 395 | {
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| 396 | case CFGTOKENTYPE_COMMA:
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| 397 | return ",";
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| 398 | case CFGTOKENTYPE_EQUAL:
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| 399 | return "=";
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| 400 | case CFGTOKENTYPE_CURLY_OPEN:
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| 401 | return "{";
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| 402 | case CFGTOKENTYPE_CURLY_CLOSING:
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| 403 | return "}";
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| 404 | case CFGTOKENTYPE_EOF:
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| 405 | return "<EOF>";
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| 406 | case CFGTOKENTYPE_ID:
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[46737] | 407 | return "<Identifier>";
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[42732] | 408 | default:
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| 409 | AssertFailed();
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| 410 | return "<Invalid>";
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| 411 | }
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[63289] | 412 | /* not reached */
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[42732] | 413 | }
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| 414 |
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[46737] | 415 | /**
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| 416 | * Returns a stringified version of the token.
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| 417 | *
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| 418 | * @returns Stringified version of the token type.
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| 419 | * @param pToken Token.
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| 420 | */
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| 421 | static const char *autostartConfigTokenToString(PCFGTOKEN pToken)
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| 422 | {
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| 423 | if (pToken->enmType == CFGTOKENTYPE_ID)
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| 424 | return pToken->u.Id.achToken;
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| 425 | else
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| 426 | return autostartConfigTokenTypeToStr(pToken->enmType);
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| 427 | }
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| 428 |
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| 429 | /**
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| 430 | * Returns the length of the token in characters (without zero terminator).
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| 431 | *
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| 432 | * @returns Token length.
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| 433 | * @param pToken Token.
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| 434 | */
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[42732] | 435 | static size_t autostartConfigTokenGetLength(PCFGTOKEN pToken)
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| 436 | {
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| 437 | switch (pToken->enmType)
|
---|
| 438 | {
|
---|
| 439 | case CFGTOKENTYPE_COMMA:
|
---|
| 440 | case CFGTOKENTYPE_EQUAL:
|
---|
| 441 | case CFGTOKENTYPE_CURLY_OPEN:
|
---|
| 442 | case CFGTOKENTYPE_CURLY_CLOSING:
|
---|
| 443 | return 1;
|
---|
| 444 | case CFGTOKENTYPE_EOF:
|
---|
| 445 | return 0;
|
---|
| 446 | case CFGTOKENTYPE_ID:
|
---|
| 447 | return strlen(pToken->u.Id.achToken);
|
---|
| 448 | default:
|
---|
| 449 | AssertFailed();
|
---|
| 450 | return 0;
|
---|
| 451 | }
|
---|
[63289] | 452 | /* not reached */
|
---|
[42732] | 453 | }
|
---|
| 454 |
|
---|
[46737] | 455 | /**
|
---|
| 456 | * Log unexpected token error.
|
---|
| 457 | *
|
---|
| 458 | * @returns nothing.
|
---|
| 459 | * @param pToken The token which caused the error.
|
---|
| 460 | * @param pszExpected String of the token which was expected.
|
---|
| 461 | */
|
---|
[42732] | 462 | static void autostartConfigTokenizerMsgUnexpectedToken(PCFGTOKEN pToken, const char *pszExpected)
|
---|
| 463 | {
|
---|
[46737] | 464 | autostartSvcLogError("Unexpected token '%s' at %d:%d.%d, expected '%s'",
|
---|
| 465 | autostartConfigTokenToString(pToken),
|
---|
| 466 | pToken->iLine, pToken->cchStart,
|
---|
| 467 | pToken->cchStart + autostartConfigTokenGetLength(pToken) - 1, pszExpected);
|
---|
[42732] | 468 | }
|
---|
| 469 |
|
---|
[42527] | 470 | /**
|
---|
[42732] | 471 | * Verfies a token and consumes it.
|
---|
[42527] | 472 | *
|
---|
| 473 | * @returns VBox status code.
|
---|
[42732] | 474 | * @param pCfgTokenizer The config tokenizer.
|
---|
| 475 | * @param pszTokenCheck The token to check for.
|
---|
[42527] | 476 | */
|
---|
[42732] | 477 | static int autostartConfigTokenizerCheckAndConsume(PCFGTOKENIZER pCfgTokenizer, CFGTOKENTYPE enmType)
|
---|
[42527] | 478 | {
|
---|
| 479 | int rc = VINF_SUCCESS;
|
---|
[42732] | 480 | PCFGTOKEN pCfgToken = NULL;
|
---|
[42527] | 481 |
|
---|
[42732] | 482 | rc = autostartConfigTokenizerGetNextToken(pCfgTokenizer, &pCfgToken);
|
---|
| 483 | if (RT_SUCCESS(rc))
|
---|
[42527] | 484 | {
|
---|
[42732] | 485 | if (pCfgToken->enmType != enmType)
|
---|
[42527] | 486 | {
|
---|
[46737] | 487 | autostartConfigTokenizerMsgUnexpectedToken(pCfgToken, autostartConfigTokenTypeToStr(enmType));
|
---|
[42732] | 488 | rc = VERR_INVALID_PARAMETER;
|
---|
[42527] | 489 | }
|
---|
| 490 |
|
---|
[42732] | 491 | autostartConfigTokenFree(pCfgTokenizer, pCfgToken);
|
---|
[42527] | 492 | }
|
---|
| 493 | return rc;
|
---|
| 494 | }
|
---|
| 495 |
|
---|
[42732] | 496 | /**
|
---|
| 497 | * Consumes the next token in the stream.
|
---|
| 498 | *
|
---|
| 499 | * @returns VBox status code.
|
---|
| 500 | * @param pCfgTokenizer Tokenizer instance data.
|
---|
| 501 | */
|
---|
| 502 | static int autostartConfigTokenizerConsume(PCFGTOKENIZER pCfgTokenizer)
|
---|
[42527] | 503 | {
|
---|
| 504 | int rc = VINF_SUCCESS;
|
---|
[42732] | 505 | PCFGTOKEN pCfgToken = NULL;
|
---|
[42527] | 506 |
|
---|
[42732] | 507 | rc = autostartConfigTokenizerGetNextToken(pCfgTokenizer, &pCfgToken);
|
---|
[42527] | 508 | if (RT_SUCCESS(rc))
|
---|
[42732] | 509 | autostartConfigTokenFree(pCfgTokenizer, pCfgToken);
|
---|
| 510 |
|
---|
[42527] | 511 | return rc;
|
---|
| 512 | }
|
---|
| 513 |
|
---|
| 514 | /**
|
---|
| 515 | * Returns the start of the next token without consuming it.
|
---|
| 516 | *
|
---|
[42732] | 517 | * @returns The next token without consuming it.
|
---|
[42527] | 518 | * @param pCfgTokenizer Tokenizer instance data.
|
---|
| 519 | */
|
---|
[42732] | 520 | DECLINLINE(PCFGTOKEN) autostartConfigTokenizerPeek(PCFGTOKENIZER pCfgTokenizer)
|
---|
[42527] | 521 | {
|
---|
[42732] | 522 | return pCfgTokenizer->pTokenNext;
|
---|
| 523 | }
|
---|
| 524 |
|
---|
| 525 | /**
|
---|
| 526 | * Check whether the next token is equal to the given one.
|
---|
| 527 | *
|
---|
| 528 | * @returns true if the next token in the stream is equal to the given one
|
---|
| 529 | * false otherwise.
|
---|
| 530 | * @param pszToken The token to check for.
|
---|
| 531 | */
|
---|
| 532 | DECLINLINE(bool) autostartConfigTokenizerPeekIsEqual(PCFGTOKENIZER pCfgTokenizer, CFGTOKENTYPE enmType)
|
---|
| 533 | {
|
---|
| 534 | PCFGTOKEN pToken = autostartConfigTokenizerPeek(pCfgTokenizer);
|
---|
| 535 | return pToken->enmType == enmType;
|
---|
| 536 | }
|
---|
| 537 |
|
---|
| 538 | /**
|
---|
| 539 | * Parse a key value node and returns the AST.
|
---|
| 540 | *
|
---|
| 541 | * @returns VBox status code.
|
---|
| 542 | * @param pCfgTokenizer The tokenizer for the config stream.
|
---|
| 543 | * @param pszKey The key for the pair.
|
---|
| 544 | * @param ppCfgAst Where to store the resulting AST on success.
|
---|
| 545 | */
|
---|
| 546 | static int autostartConfigParseValue(PCFGTOKENIZER pCfgTokenizer, const char *pszKey,
|
---|
| 547 | PCFGAST *ppCfgAst)
|
---|
| 548 | {
|
---|
[42527] | 549 | int rc = VINF_SUCCESS;
|
---|
[42732] | 550 | PCFGTOKEN pToken = NULL;
|
---|
[42527] | 551 |
|
---|
[42732] | 552 | rc = autostartConfigTokenizerGetNextToken(pCfgTokenizer, &pToken);
|
---|
| 553 | if ( RT_SUCCESS(rc)
|
---|
| 554 | && pToken->enmType == CFGTOKENTYPE_ID)
|
---|
[42527] | 555 | {
|
---|
[42732] | 556 | PCFGAST pCfgAst = NULL;
|
---|
[42527] | 557 |
|
---|
[73097] | 558 | pCfgAst = (PCFGAST)RTMemAllocZ(RT_UOFFSETOF_DYN(CFGAST, u.KeyValue.aszValue[pToken->u.Id.cchToken + 1]));
|
---|
[42732] | 559 | if (!pCfgAst)
|
---|
| 560 | return VERR_NO_MEMORY;
|
---|
[42527] | 561 |
|
---|
[42732] | 562 | pCfgAst->enmType = CFGASTNODETYPE_KEYVALUE;
|
---|
| 563 | pCfgAst->pszKey = RTStrDup(pszKey);
|
---|
| 564 | if (!pCfgAst->pszKey)
|
---|
[42527] | 565 | {
|
---|
[42732] | 566 | RTMemFree(pCfgAst);
|
---|
| 567 | return VERR_NO_MEMORY;
|
---|
[42527] | 568 | }
|
---|
[42732] | 569 |
|
---|
| 570 | memcpy(pCfgAst->u.KeyValue.aszValue, pToken->u.Id.achToken, pToken->u.Id.cchToken);
|
---|
| 571 | pCfgAst->u.KeyValue.cchValue = pToken->u.Id.cchToken;
|
---|
| 572 | *ppCfgAst = pCfgAst;
|
---|
[42527] | 573 | }
|
---|
[42732] | 574 | else
|
---|
| 575 | {
|
---|
| 576 | autostartConfigTokenizerMsgUnexpectedToken(pToken, "non reserved token");
|
---|
| 577 | rc = VERR_INVALID_PARAMETER;
|
---|
| 578 | }
|
---|
[42527] | 579 |
|
---|
| 580 | return rc;
|
---|
| 581 | }
|
---|
| 582 |
|
---|
| 583 | /**
|
---|
[42732] | 584 | * Parses a compound node constructing the AST and returning it on success.
|
---|
[42527] | 585 | *
|
---|
[42732] | 586 | * @returns VBox status code.
|
---|
| 587 | * @param pCfgTokenizer The tokenizer for the config stream.
|
---|
| 588 | * @param pszScopeId The scope ID of the compound node.
|
---|
| 589 | * @param ppCfgAst Where to store the resulting AST on success.
|
---|
[42527] | 590 | */
|
---|
[42732] | 591 | static int autostartConfigParseCompoundNode(PCFGTOKENIZER pCfgTokenizer, const char *pszScopeId,
|
---|
| 592 | PCFGAST *ppCfgAst)
|
---|
[42527] | 593 | {
|
---|
[42732] | 594 | unsigned cAstNodesMax = 10;
|
---|
[73097] | 595 | PCFGAST pCfgAst = (PCFGAST)RTMemAllocZ(RT_UOFFSETOF_DYN(CFGAST, u.Compound.apAstNodes[cAstNodesMax]));
|
---|
[42732] | 596 | if (!pCfgAst)
|
---|
| 597 | return VERR_NO_MEMORY;
|
---|
[42527] | 598 |
|
---|
[42732] | 599 | pCfgAst->enmType = CFGASTNODETYPE_COMPOUND;
|
---|
[46737] | 600 | pCfgAst->u.Compound.cAstNodes = 0;
|
---|
[42732] | 601 | pCfgAst->pszKey = RTStrDup(pszScopeId);
|
---|
| 602 | if (!pCfgAst->pszKey)
|
---|
| 603 | {
|
---|
| 604 | RTMemFree(pCfgAst);
|
---|
| 605 | return VERR_NO_MEMORY;
|
---|
| 606 | }
|
---|
[42527] | 607 |
|
---|
[63289] | 608 | int rc = VINF_SUCCESS;
|
---|
[42732] | 609 | do
|
---|
[42527] | 610 | {
|
---|
[42732] | 611 | PCFGTOKEN pToken = NULL;
|
---|
| 612 | PCFGAST pAstNode = NULL;
|
---|
[42527] | 613 |
|
---|
[42732] | 614 | if ( autostartConfigTokenizerPeekIsEqual(pCfgTokenizer, CFGTOKENTYPE_CURLY_CLOSING)
|
---|
| 615 | || autostartConfigTokenizerPeekIsEqual(pCfgTokenizer, CFGTOKENTYPE_EOF))
|
---|
| 616 | break;
|
---|
| 617 |
|
---|
| 618 | rc = autostartConfigTokenizerGetNextToken(pCfgTokenizer, &pToken);
|
---|
| 619 | if ( RT_SUCCESS(rc)
|
---|
| 620 | && pToken->enmType == CFGTOKENTYPE_ID)
|
---|
[42527] | 621 | {
|
---|
[42732] | 622 | /* Next must be a = token in all cases at this place. */
|
---|
| 623 | rc = autostartConfigTokenizerCheckAndConsume(pCfgTokenizer, CFGTOKENTYPE_EQUAL);
|
---|
| 624 | if (RT_SUCCESS(rc))
|
---|
[42527] | 625 | {
|
---|
[42732] | 626 | /* Check whether this is a compound node. */
|
---|
| 627 | if (autostartConfigTokenizerPeekIsEqual(pCfgTokenizer, CFGTOKENTYPE_CURLY_OPEN))
|
---|
[42527] | 628 | {
|
---|
[42732] | 629 | rc = autostartConfigTokenizerConsume(pCfgTokenizer);
|
---|
| 630 | if (RT_SUCCESS(rc))
|
---|
| 631 | rc = autostartConfigParseCompoundNode(pCfgTokenizer, pToken->u.Id.achToken,
|
---|
| 632 | &pAstNode);
|
---|
[42527] | 633 |
|
---|
[42732] | 634 | if (RT_SUCCESS(rc))
|
---|
| 635 | rc = autostartConfigTokenizerCheckAndConsume(pCfgTokenizer, CFGTOKENTYPE_CURLY_CLOSING);
|
---|
| 636 | }
|
---|
| 637 | else
|
---|
| 638 | rc = autostartConfigParseValue(pCfgTokenizer, pToken->u.Id.achToken,
|
---|
| 639 | &pAstNode);
|
---|
| 640 | }
|
---|
| 641 | }
|
---|
| 642 | else if (RT_SUCCESS(rc))
|
---|
| 643 | {
|
---|
| 644 | autostartConfigTokenizerMsgUnexpectedToken(pToken, "non reserved token");
|
---|
| 645 | rc = VERR_INVALID_PARAMETER;
|
---|
| 646 | }
|
---|
[42527] | 647 |
|
---|
[42732] | 648 | /* Add to the current compound node. */
|
---|
| 649 | if (RT_SUCCESS(rc))
|
---|
| 650 | {
|
---|
[46737] | 651 | if (pCfgAst->u.Compound.cAstNodes >= cAstNodesMax)
|
---|
| 652 | {
|
---|
| 653 | cAstNodesMax += 10;
|
---|
| 654 |
|
---|
[73097] | 655 | PCFGAST pCfgAstNew = (PCFGAST)RTMemRealloc(pCfgAst, RT_UOFFSETOF_DYN(CFGAST, u.Compound.apAstNodes[cAstNodesMax]));
|
---|
[46737] | 656 | if (!pCfgAstNew)
|
---|
| 657 | rc = VERR_NO_MEMORY;
|
---|
| 658 | else
|
---|
| 659 | pCfgAst = pCfgAstNew;
|
---|
| 660 | }
|
---|
| 661 |
|
---|
| 662 | if (RT_SUCCESS(rc))
|
---|
| 663 | {
|
---|
| 664 | pCfgAst->u.Compound.apAstNodes[pCfgAst->u.Compound.cAstNodes] = pAstNode;
|
---|
| 665 | pCfgAst->u.Compound.cAstNodes++;
|
---|
| 666 | }
|
---|
[42732] | 667 | }
|
---|
[42527] | 668 |
|
---|
[42732] | 669 | autostartConfigTokenFree(pCfgTokenizer, pToken);
|
---|
[42527] | 670 |
|
---|
[42732] | 671 | } while (RT_SUCCESS(rc));
|
---|
[42527] | 672 |
|
---|
[42732] | 673 | if (RT_SUCCESS(rc))
|
---|
| 674 | *ppCfgAst = pCfgAst;
|
---|
| 675 | else
|
---|
| 676 | autostartConfigAstDestroy(pCfgAst);
|
---|
[42527] | 677 |
|
---|
[42732] | 678 | return rc;
|
---|
| 679 | }
|
---|
[42527] | 680 |
|
---|
[42732] | 681 | DECLHIDDEN(int) autostartParseConfig(const char *pszFilename, PCFGAST *ppCfgAst)
|
---|
| 682 | {
|
---|
| 683 | PCFGTOKENIZER pCfgTokenizer = NULL;
|
---|
| 684 | int rc = VINF_SUCCESS;
|
---|
| 685 | PCFGAST pCfgAst = NULL;
|
---|
[42527] | 686 |
|
---|
[42732] | 687 | AssertPtrReturn(pszFilename, VERR_INVALID_POINTER);
|
---|
| 688 | AssertPtrReturn(ppCfgAst, VERR_INVALID_POINTER);
|
---|
[42527] | 689 |
|
---|
[42732] | 690 | rc = autostartConfigTokenizerCreate(pszFilename, &pCfgTokenizer);
|
---|
| 691 | if (RT_SUCCESS(rc))
|
---|
| 692 | {
|
---|
| 693 | rc = autostartConfigParseCompoundNode(pCfgTokenizer, "", &pCfgAst);
|
---|
| 694 | if (RT_SUCCESS(rc))
|
---|
| 695 | rc = autostartConfigTokenizerCheckAndConsume(pCfgTokenizer, CFGTOKENTYPE_EOF);
|
---|
| 696 | }
|
---|
[42527] | 697 |
|
---|
[42732] | 698 | if (pCfgTokenizer)
|
---|
| 699 | autostartConfigTokenizerDestroy(pCfgTokenizer);
|
---|
| 700 |
|
---|
| 701 | if (RT_SUCCESS(rc))
|
---|
| 702 | *ppCfgAst = pCfgAst;
|
---|
| 703 |
|
---|
| 704 | return rc;
|
---|
| 705 | }
|
---|
| 706 |
|
---|
| 707 | DECLHIDDEN(void) autostartConfigAstDestroy(PCFGAST pCfgAst)
|
---|
| 708 | {
|
---|
| 709 | AssertPtrReturnVoid(pCfgAst);
|
---|
| 710 |
|
---|
| 711 | switch (pCfgAst->enmType)
|
---|
| 712 | {
|
---|
| 713 | case CFGASTNODETYPE_KEYVALUE:
|
---|
| 714 | {
|
---|
| 715 | RTMemFree(pCfgAst);
|
---|
| 716 | break;
|
---|
[42527] | 717 | }
|
---|
[42732] | 718 | case CFGASTNODETYPE_COMPOUND:
|
---|
| 719 | {
|
---|
| 720 | for (unsigned i = 0; i < pCfgAst->u.Compound.cAstNodes; i++)
|
---|
| 721 | autostartConfigAstDestroy(pCfgAst->u.Compound.apAstNodes[i]);
|
---|
| 722 | RTMemFree(pCfgAst);
|
---|
| 723 | break;
|
---|
| 724 | }
|
---|
| 725 | case CFGASTNODETYPE_LIST:
|
---|
| 726 | default:
|
---|
| 727 | AssertMsgFailed(("Invalid AST node type %d\n", pCfgAst->enmType));
|
---|
| 728 | }
|
---|
| 729 | }
|
---|
[42527] | 730 |
|
---|
[42732] | 731 | DECLHIDDEN(PCFGAST) autostartConfigAstGetByName(PCFGAST pCfgAst, const char *pszName)
|
---|
| 732 | {
|
---|
| 733 | if (!pCfgAst)
|
---|
| 734 | return NULL;
|
---|
| 735 |
|
---|
| 736 | AssertReturn(pCfgAst->enmType == CFGASTNODETYPE_COMPOUND, NULL);
|
---|
| 737 |
|
---|
| 738 | for (unsigned i = 0; i < pCfgAst->u.Compound.cAstNodes; i++)
|
---|
| 739 | {
|
---|
| 740 | PCFGAST pNode = pCfgAst->u.Compound.apAstNodes[i];
|
---|
| 741 |
|
---|
| 742 | if (!RTStrCmp(pNode->pszKey, pszName))
|
---|
| 743 | return pNode;
|
---|
[42527] | 744 | }
|
---|
| 745 |
|
---|
[42732] | 746 | return NULL;
|
---|
[42527] | 747 | }
|
---|
| 748 |
|
---|