From df292aade4d174a7a5824f463b3a1dccf20e6c54 Mon Sep 17 00:00:00 2001
From: Pavel Pisa <pisa@cmp.felk.cvut.cz>
Date: Tue, 12 Feb 2019 16:18:58 +0100
Subject: Make memory and program listing editable.

Instruction parsing is rough and does not support branch offset computation.

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
---
 qtmips_gui/memorymodel.cpp  | 42 ++++++++++++++++++++++++++++++++++++++++++
 qtmips_gui/memorymodel.h    |  2 ++
 qtmips_gui/programmodel.cpp | 41 +++++++++++++++++++++++++++++++++++++++++
 qtmips_gui/programmodel.h   |  2 ++
 4 files changed, 87 insertions(+)

(limited to 'qtmips_gui')

diff --git a/qtmips_gui/memorymodel.cpp b/qtmips_gui/memorymodel.cpp
index 12b3fcb..597b88f 100644
--- a/qtmips_gui/memorymodel.cpp
+++ b/qtmips_gui/memorymodel.cpp
@@ -225,3 +225,45 @@ void MemoryModel::cached_access(int cached) {
     access_through_cache = cached;
     update_all();
 }
+
+Qt::ItemFlags MemoryModel::flags(const QModelIndex &index) const {
+    if (index.column() == 0)
+        return QAbstractTableModel::flags(index);
+    else
+        return QAbstractTableModel::flags(index) | Qt::ItemIsEditable;
+}
+
+bool MemoryModel::setData(const QModelIndex & index, const QVariant & value, int role) {
+    if (role == Qt::EditRole)
+    {
+        bool ok;
+        std::uint32_t address;
+        std::uint32_t data = value.toString().toULong(&ok, 16);
+        if (!ok)
+            return false;
+        machine::MemoryAccess *mem;
+        if (!get_row_address(address, index.row()))
+            return false;
+        if (index.column() == 0 || machine == nullptr)
+            return false;
+        mem = machine->memory_rw();
+        if (mem == nullptr)
+            return false;
+        if ((access_through_cache > 0) && (machine->cache_data_rw() != nullptr))
+            mem = machine->cache_data_rw();
+        address += cellSizeBytes() * (index.column() - 1);
+        switch (cell_size) {
+        case CELLSIZE_BYTE:
+            mem->write_byte(address, data);
+            break;
+        case CELLSIZE_HWORD:
+            mem->write_hword(address, data);
+            break;
+        default:
+        case CELLSIZE_WORD:
+            mem->write_word(address, data);
+            break;
+        }
+    }
+    return true;
+}
diff --git a/qtmips_gui/memorymodel.h b/qtmips_gui/memorymodel.h
index 83bc057..7d12f91 100644
--- a/qtmips_gui/memorymodel.h
+++ b/qtmips_gui/memorymodel.h
@@ -57,6 +57,8 @@ public:
     int columnCount(const QModelIndex &parent = QModelIndex()) const override;
     QVariant headerData(int section, Qt::Orientation orientation, int role) const override;
     QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
+    Qt::ItemFlags flags(const QModelIndex &index) const;
+    bool setData(const QModelIndex & index, const QVariant & value, int role);
     bool adjustRowAndOffset(int &row, int optimal_row, std::uint32_t address);
     void update_all();
 
diff --git a/qtmips_gui/programmodel.cpp b/qtmips_gui/programmodel.cpp
index 4a758b7..5112bb8 100644
--- a/qtmips_gui/programmodel.cpp
+++ b/qtmips_gui/programmodel.cpp
@@ -203,3 +203,44 @@ void ProgramModel::toggle_hw_break(const QModelIndex & index) {
         machine->insert_hwbreak(address);
     update_all();
 }
+
+Qt::ItemFlags ProgramModel::flags(const QModelIndex &index) const {
+    if (index.column() != 2 && index.column() != 3)
+        return QAbstractTableModel::flags(index);
+    else
+        return QAbstractTableModel::flags(index) | Qt::ItemIsEditable;
+}
+
+bool ProgramModel::setData(const QModelIndex & index, const QVariant & value, int role) {
+    if (role == Qt::EditRole)
+    {
+        bool ok;
+        std::uint32_t address;
+        std::uint32_t data;
+        machine::MemoryAccess *mem;
+        if (!get_row_address(address, index.row()))
+            return false;
+        if (index.column() == 0 || machine == nullptr)
+            return false;
+        mem = machine->memory_rw();
+        if (mem == nullptr)
+            return false;
+        switch (index.column()) {
+        case 2:
+            data = value.toString().toULong(&ok, 16);
+            if (!ok)
+                return false;
+            mem->write_word(address, data);
+            break;
+        case 3:
+            data = machine::Instruction::from_string(value.toString(), &ok).data();
+            if (!ok)
+                return false;
+            mem->write_word(address, data);
+            break;
+        default:
+            return false;
+        }
+    }
+    return true;
+}
diff --git a/qtmips_gui/programmodel.h b/qtmips_gui/programmodel.h
index a6db493..9beecef 100644
--- a/qtmips_gui/programmodel.h
+++ b/qtmips_gui/programmodel.h
@@ -51,6 +51,8 @@ public:
     int columnCount(const QModelIndex &parent = QModelIndex()) const override;
     QVariant headerData(int section, Qt::Orientation orientation, int role) const override;
     QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
+    Qt::ItemFlags flags(const QModelIndex &index) const;
+    bool setData(const QModelIndex & index, const QVariant & value, int role);
     bool adjustRowAndOffset(int &row, int optimal_row, std::uint32_t address);
     void update_all();
 
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