From 21a9aa92a7cf8767a0fcb33858546dea744c4071 Mon Sep 17 00:00:00 2001
From: Oxore <oxore@protonmail.com>
Date: Mon, 5 Feb 2024 01:20:51 +0300
Subject: Organize source code and tests

---
 src/common.h | 85 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 src/common.h

(limited to 'src/common.h')

diff --git a/src/common.h b/src/common.h
new file mode 100644
index 0000000..76fc956
--- /dev/null
+++ b/src/common.h
@@ -0,0 +1,85 @@
+#pragma once
+
+/* SPDX-License-Identifier: Unlicense
+ */
+
+#include <cstddef>
+#include <cstdint>
+
+enum class BFDTarget {
+    kAuto,
+    kBinary,
+    kELF,
+};
+
+struct Settings {
+    bool raw_data_comment{};
+    bool labels{};
+    bool rel_labels{};
+    bool abs_labels{};
+    bool imm_labels{};
+    bool short_ref_local_labels{};
+    bool export_labels{};
+    bool export_all_labels{};
+    bool export_functions{};
+    bool xrefs_to{};
+    bool xrefs_from{};
+    bool imm_hex{};
+    bool follow_jumps{};
+    bool walk{};
+    BFDTarget bfd{};
+    const char *indent{"\t"};
+};
+
+using RefKindMask = unsigned;
+
+constexpr RefKindMask kRef1RelMask = (1 << 0); // For first argument
+constexpr RefKindMask kRef1AbsMask = (1 << 1); // For first argument
+constexpr RefKindMask kRef2RelMask = (1 << 2); // For second argument
+constexpr RefKindMask kRef2AbsMask = (1 << 3); // For second argument
+constexpr RefKindMask kRef1ReadMask = (1 << 4); // For first argument
+constexpr RefKindMask kRef1WriteMask = (1 << 5); // For first argument
+constexpr RefKindMask kRef2ReadMask = (1 << 6); // For second argument
+constexpr RefKindMask kRef2WriteMask = (1 << 7); // For second argument
+/// Indicates whether instruction is a call or just a branch, for any argument.
+/// Calls are BSR and JSR, branches are DBcc, Bcc and JMP.
+constexpr RefKindMask kRefCallMask = (1 << 8);
+/// Hack flag for MOVEM with PC relative value when -frel-labels is set
+constexpr RefKindMask kRefPcRelFix2Bytes = (1 << 9);
+/// Register 1 may have immediate moving to address register which may be a
+/// labeled location
+constexpr RefKindMask kRef1ImmMask = (1 << 10);
+/// Everything for first argument
+constexpr RefKindMask kRef1Mask = kRef1RelMask | kRef1AbsMask | kRef1ReadMask | kRef1WriteMask | kRef1ImmMask;
+/// Everything for Second argument
+constexpr RefKindMask kRef2Mask = kRef2RelMask | kRef2AbsMask | kRef2ReadMask | kRef2WriteMask;
+constexpr RefKindMask kRefRelMask = kRef1RelMask | kRef2RelMask;
+constexpr RefKindMask kRefAbsMask = kRef1AbsMask | kRef2AbsMask;
+constexpr RefKindMask kRef1DataMask = kRef1ReadMask | kRef1WriteMask; // For first argument
+constexpr RefKindMask kRef2DataMask = kRef2ReadMask | kRef2WriteMask; // For second argument
+constexpr RefKindMask kRefReadMask = kRef1ReadMask | kRef2ReadMask; // For any argument
+constexpr RefKindMask kRefWriteMask = kRef1WriteMask | kRef2WriteMask; // For any argument
+constexpr RefKindMask kRefDataMask = kRefReadMask | kRefWriteMask;
+constexpr size_t kInstructionSizeStepBytes = 2;
+constexpr size_t kRomSizeBytes = 4 * 1024 * 1024;
+constexpr size_t kDisasmMapSizeElements = kRomSizeBytes / kInstructionSizeStepBytes;
+
+static inline constexpr size_t Min(size_t a, size_t b) { return a < b ? a : b; }
+
+static inline constexpr uint16_t GetU16BE(const uint8_t *buffer)
+{
+    return (static_cast<uint16_t>(buffer[0]) << 8) | static_cast<uint16_t>(buffer[1]);
+}
+
+static inline constexpr int16_t GetI16BE(const uint8_t *buffer)
+{
+    return (static_cast<uint16_t>(buffer[0]) << 8) | static_cast<uint16_t>(buffer[1]);
+}
+
+static inline constexpr int32_t GetI32BE(const uint8_t *buffer)
+{
+    return (static_cast<uint32_t>(buffer[0]) << 24) |
+        (static_cast<uint32_t>(buffer[1]) << 16) |
+        (static_cast<uint32_t>(buffer[2]) << 8) |
+        static_cast<uint32_t>(buffer[3]);
+}
-- 
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