| 1 | /* $Id: DisasmFormatBytes.cpp 99220 2023-03-30 12:40:46Z vboxsync $ */
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| 2 | /** @file
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| 3 | * VBox Disassembler - Helper for formatting the opcode bytes.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2008-2023 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * SPDX-License-Identifier: GPL-3.0-only
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| 26 | */
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| 27 |
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| 28 |
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| 29 | /*********************************************************************************************************************************
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| 30 | * Header Files *
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| 31 | *********************************************************************************************************************************/
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| 32 | #include "DisasmInternal.h"
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| 33 | #include <iprt/string.h>
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| 34 | #include <iprt/assert.h>
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| 35 | #include <iprt/errcore.h>
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| 36 |
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| 37 |
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| 38 | /**
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| 39 | * Helper function for formatting the opcode bytes.
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| 40 | *
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| 41 | * @returns The number of output bytes.
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| 42 | *
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| 43 | * @param pDis Pointer to the disassembler state.
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| 44 | * @param pszDst The output buffer.
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| 45 | * @param cchDst The size of the output buffer.
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| 46 | * @param fFlags The flags passed to the formatter.
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| 47 | */
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| 48 | size_t disFormatBytes(PCDISSTATE pDis, char *pszDst, size_t cchDst, uint32_t fFlags)
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| 49 | {
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| 50 | size_t cchOutput = 0;
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| 51 | uint32_t cb = pDis->cbInstr;
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| 52 | AssertStmt(cb <= 16, cb = 16);
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| 53 |
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| 54 | #define PUT_C(ch) \
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| 55 | do { \
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| 56 | cchOutput++; \
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| 57 | if (cchDst > 1) \
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| 58 | { \
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| 59 | cchDst--; \
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| 60 | *pszDst++ = (ch); \
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| 61 | } \
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| 62 | } while (0)
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| 63 | #define PUT_NUM(cch, fmt, num) \
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| 64 | do { \
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| 65 | cchOutput += (cch); \
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| 66 | if (cchDst > 1) \
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| 67 | { \
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| 68 | const size_t cchTmp = RTStrPrintf(pszDst, cchDst, fmt, (num)); \
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| 69 | pszDst += cchTmp; \
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| 70 | cchDst -= cchTmp; \
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| 71 | } \
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| 72 | } while (0)
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| 73 |
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| 74 |
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| 75 | if (fFlags & DIS_FMT_FLAGS_BYTES_BRACKETS)
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| 76 | PUT_C('[');
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| 77 |
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| 78 | for (uint32_t i = 0; i < cb; i++)
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| 79 | {
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| 80 | if (i != 0 && (fFlags & DIS_FMT_FLAGS_BYTES_SPACED))
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| 81 | PUT_NUM(3, " %02x", pDis->u.abInstr[i]);
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| 82 | else
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| 83 | PUT_NUM(2, "%02x", pDis->u.abInstr[i]);
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| 84 | }
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| 85 |
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| 86 | if (fFlags & DIS_FMT_FLAGS_BYTES_BRACKETS)
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| 87 | PUT_C(']');
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| 88 |
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| 89 | /* Terminate it just in case. */
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| 90 | if (cchDst >= 1)
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| 91 | *pszDst = '\0';
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| 92 |
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| 93 | #undef PUT_C
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| 94 | #undef PUT_NUM
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| 95 | return cchOutput;
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| 96 | }
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| 97 |
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