1 files changed, 97 insertions, 0 deletions
diff --git a/src/VBox/Disassembler/DisasmFormatBytes.cpp b/src/VBox/Disassembler/DisasmFormatBytes.cpp
new file mode 100644
index 00000000..f012d15b
--- /dev/null
+++ b/src/VBox/Disassembler/DisasmFormatBytes.cpp
@@ -0,0 +1,97 @@
+/* $Id: DisasmFormatBytes.cpp $ */
+/** @file
+ * VBox Disassembler - Helper for formatting the opcode bytes.
+ */
+
+/*
+ * Copyright (C) 2008-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include "DisasmInternal.h"
+#include <iprt/string.h>
+#include <iprt/assert.h>
+#include <iprt/errcore.h>
+
+
+/**
+ * Helper function for formatting the opcode bytes.
+ *
+ * @returns The number of output bytes.
+ *
+ * @param   pDis    Pointer to the disassembler state.
+ * @param   pszDst  The output buffer.
+ * @param   cchDst  The size of the output buffer.
+ * @param   fFlags  The flags passed to the formatter.
+ */
+size_t disFormatBytes(PCDISSTATE pDis, char *pszDst, size_t cchDst, uint32_t fFlags)
+{
+    size_t      cchOutput = 0;
+    uint32_t    cb        = pDis->cbInstr;
+    AssertStmt(cb <= 16, cb = 16);
+
+#define PUT_C(ch) \
+            do { \
+                cchOutput++; \
+                if (cchDst > 1) \
+                { \
+                    cchDst--; \
+                    *pszDst++ = (ch); \
+                } \
+            } while (0)
+#define PUT_NUM(cch, fmt, num) \
+            do { \
+                 cchOutput += (cch); \
+                 if (cchDst > 1) \
+                 { \
+                    const size_t cchTmp = RTStrPrintf(pszDst, cchDst, fmt, (num)); \
+                    pszDst += cchTmp; \
+                    cchDst -= cchTmp; \
+                 } \
+            } while (0)
+
+
+    if (fFlags & DIS_FMT_FLAGS_BYTES_BRACKETS)
+        PUT_C('[');
+
+    for (uint32_t i = 0; i < cb; i++)
+    {
+        if (i != 0 && (fFlags & DIS_FMT_FLAGS_BYTES_SPACED))
+            PUT_NUM(3, " %02x", pDis->abInstr[i]);
+        else
+            PUT_NUM(2, "%02x", pDis->abInstr[i]);
+    }
+
+    if (fFlags & DIS_FMT_FLAGS_BYTES_BRACKETS)
+        PUT_C(']');
+
+    /* Terminate it just in case. */
+    if (cchDst >= 1)
+        *pszDst = '\0';
+
+#undef PUT_C
+#undef PUT_NUM
+    return cchOutput;
+}
+