// Mini memory editor for Dear ImGui (to embed in your game/tools)
// Animated GIF: https://twitter.com/ocornut/status/894242704317530112
// Get latest version at http://www.github.com/ocornut/imgui_club
//
// Right-click anywhere to access the Options menu!
// You can adjust the keyboard repeat delay/rate in ImGuiIO.
// The code assume a mono-space font for simplicity! If you don't use the default font, use ImGui::PushFont()/PopFont() to switch to a mono-space font before caling this.
//
// Usage:
// static MemoryEditor mem_edit_1; // store your state somewhere
// mem_edit_1.DrawWindow("Memory Editor", mem_block, mem_block_size, 0x0000); // create a window and draw memory editor (if you already have a window, use DrawContents())
//
// Usage:
// static MemoryEditor mem_edit_2;
// ImGui::Begin("MyWindow")
// mem_edit_2.DrawContents(this, sizeof(*this), (size_t)this);
// ImGui::End();
//
// Changelog:
// - v0.10: initial version
// - v0.11: always refresh active text input with the latest byte from source memory if it's not being edited.
// - v0.12: added OptMidRowsCount to allow extra spacing every XX rows.
// - v0.13: added optional ReadFn/WriteFn handlers to access memory via a function. various warning fixes for 64-bits.
// - v0.14: added GotoAddr member, added GotoAddrAndHighlight() and highlighting. fixed minor scrollbar glitch when resizing.
// - v0.15: added maximum window width. minor optimization.
// - v0.16: added OptGreyOutZeroes option. various sizing fixes when resizing using the "Rows" drag.
// - v0.17: added HighlightFn handler for optional non-contiguous highlighting.
// - v0.18: fixes for displaying 64-bits addresses, fixed mouse click gaps introduced in recent changes, cursor tracking scrolling fixes.
// - v0.19: fixed auto-focus of next byte leaving WantCaptureKeyboard=false for one frame. we now capture the keyboard during that transition.
// - v0.20: added options menu. added OptShowAscii checkbox. added optional HexII display. split Draw() in DrawWindow()/DrawContents(). fixing glyph width. refactoring/cleaning code.
// - v0.21: fixes for using DrawContents() in our own window. fixed HexII to actually be useful and not on the wrong side.
// - v0.22: clicking Ascii view select the byte in the Hex view. Ascii view highlight selection.
// - v0.23: fixed right-arrow triggering a byte write.
// - v0.24: changed DragInt("Rows" to use a %d data format (which is desirable since imgui 1.61).
// - v0.25: fixed wording: all occurrences of "Rows" renamed to "Columns".
// - v0.26: fixed clicking on hex region
// - v0.30: added data preview for common data types
// - v0.31: added OptUpperCaseHex option to select lower/upper casing display [@samhocevar]
// - v0.32: changed signatures to use void* instead of unsigned char*
// - v0.33: added OptShowOptions option to hide all the interactive option setting.
//
// Todo/Bugs:
// - Arrows are being sent to the InputText() about to disappear which for LeftArrow makes the text cursor appear at position 1 for one frame.
// - Using InputText() is awkward and maybe overkill here, consider implementing something custom.
#pragma once
#include <stdio.h> // sprintf, scanf
#include <stdint.h> // uint8_t, etc.
#ifdef _MSC_VER
#define _PRISizeT "I"
#define snprintf _snprintf
#else
#define _PRISizeT "z"
#endif
struct MemoryEditor
{
typedef unsigned char u8;
enum DataType
{
DataType_S8,
DataType_U8,
DataType_S16,
DataType_U16,
DataType_S32,
DataType_U32,
DataType_S64,
DataType_U64,
DataType_Float,
DataType_Double,
DataType_COUNT
};
enum DataFormat
{
DataFormat_Bin = 0,
DataFormat_Dec = 1,
DataFormat_Hex = 2,
DataFormat_COUNT
};
// Settings
bool Open; // = true // set to false when DrawWindow() was closed. ignore if not using DrawWindow().
bool ReadOnly; // = false // disable any editing.
int Cols; // = 16 // number of columns to display.
bool OptShowOptions; // = true // display options button/context menu. when disabled, options will be locked unless you provide your own UI for them.
bool OptShowDataPreview; // = false // display a footer previewing the decimal/binary/hex/float representation of the currently selected bytes.
bool OptShowHexII; // = false // display values in HexII representation instead of regular hexadecimal: hide null/zero bytes, ascii values as ".X".
bool OptShowAscii; // = true // display ASCII representation on the right side.
bool OptGreyOutZeroes; // = true // display null/zero bytes using the TextDisabled color.
bool OptUpperCaseHex; // = true // display hexadecimal values as "FF" instead of "ff".
int OptMidColsCount; // = 8 // set to 0 to disable extra spacing between every mid-cols.
int OptAddrDigitsCount; // = 0 // number of addr digits to display (default calculated based on maximum displayed addr).
ImU32 HighlightColor; // // background color of highlighted bytes.
u8 (*ReadFn)(const u8* data, size_t off); // = NULL // optional handler to read bytes.
void (*WriteFn)(u8* data, size_t off, u8 d); // = NULL // optional handler to write bytes.
bool (*HighlightFn)(const u8* data, size_t off);//NULL // optional handler to return Highlight property (to support non-contiguous highlighting).
// [Internal State]
bool ContentsWidthChanged;
size_t DataPreviewAddr;
size_t DataEditingAddr;
bool DataEditingTakeFocus;
char DataInputBuf[32];
char AddrInputBuf[32];
size_t GotoAddr;
size_t HighlightMin, HighlightMax;
int PreviewEndianess;
DataType PreviewDataType;
MemoryEditor()
{
// Settings
Open = true;
ReadOnly = false;
Cols = 16;
OptShowOptions = true;
OptShowDataPreview = false;
OptShowHexII = false;
OptShowAscii = true;
OptGreyOutZeroes = true;
OptUpperCaseHex = true;
OptMidColsCount = 8;
OptAddrDigitsCount = 0;
HighlightColor = IM_COL32(255, 255, 255, 50);
ReadFn = NULL;
WriteFn = NULL;
HighlightFn = NULL;
// State/Internals
ContentsWidthChanged = false;
DataPreviewAddr = DataEditingAddr = (size_t)-1;
DataEditingTakeFocus = false;
memset(DataInputBuf, 0, sizeof(DataInputBuf));
memset(AddrInputBuf, 0, sizeof(AddrInputBuf));
GotoAddr = (size_t)-1;
HighlightMin = HighlightMax = (size_t)-1;
PreviewEndianess = 0;
PreviewDataType = DataType_S32;
}
void GotoAddrAndHighlight(size_t addr_min, size_t addr_max)
{
GotoAddr = addr_min;
HighlightMin = addr_min;
HighlightMax = addr_max;
}
struct Sizes
{
int AddrDigitsCount;
float LineHeight;
float GlyphWidth;
float HexCellWidth;
float SpacingBetweenMidCols;
float PosHexStart;
float PosHexEnd;
float PosAsciiStart;
float PosAsciiEnd;
float WindowWidth;
};
void CalcSizes(Sizes& s, size_t mem_size, size_t base_display_addr)
{
ImGuiStyle& style = ImGui::GetStyle();
s.AddrDigitsCount = OptAddrDigitsCount;
if (s.AddrDigitsCount == 0)
for (size_t n = base_display_addr + mem_size - 1; n > 0; n >>= 4)
s.AddrDigitsCount++;
s.LineHeight = ImGui::GetTextLineHeight();
s.GlyphWidth = ImGui::CalcTextSize("F").x + 1; // We assume the font is mono-space
s.HexCellWidth = (float)(int)(s.GlyphWidth * 2.5f); // "FF " we include trailing space in the width to easily catch clicks everywhere
s.SpacingBetweenMidCols = (float)(int)(s.HexCellWidth * 0.25f); // Every OptMidColsCount columns we add a bit of extra spacing
s.PosHexStart = (s.AddrDigitsCount + 2) * s.GlyphWidth;
s.PosHexEnd = s.PosHexStart + (s.HexCellWidth * Cols);
s.PosAsciiStart = s.PosAsciiEnd = s.PosHexEnd;
if (OptShowAscii)
{
s.PosAsciiStart = s.PosHexEnd + s.GlyphWidth * 1;
if (OptMidColsCount > 0)
s.PosAsciiStart += ((Cols + OptMidColsCount - 1) / OptMidColsCount) * s.SpacingBetweenMidCols;
s.PosAsciiEnd = s.PosAsciiStart + Cols * s.GlyphWidth;
}
s.WindowWidth = s.PosAsciiEnd + style.ScrollbarSize + style.WindowPadding.x * 2 + s.GlyphWidth;
}
// Standalone Memory Editor window
void DrawWindow(const char* title, void* mem_data, size_t mem_size, size_t base_display_addr = 0x0000)
{
Sizes s;
CalcSizes(s, mem_size, base_display_addr);
ImGui::SetNextWindowSizeConstraints(ImVec2(0.0f, 0.0f), ImVec2(s.WindowWidth, FLT_MAX));
Open = true;
if (ImGui::Begin(title, &Open, ImGuiWindowFlags_NoScrollbar))
{
if (ImGui::IsWindowHovered(ImGuiHoveredFlags_RootAndChildWindows) && ImGui::IsMouseClicked(1))
ImGui::OpenPopup("context");
DrawContents(mem_data, mem_size, base_display_addr);
if (ContentsWidthChanged)
{
CalcSizes(s, mem_size, base_display_addr);
ImGui::SetWindowSize(ImVec2(s.WindowWidth, ImGui::GetWindowSize().y));
}
}
ImGui::End();
}
// Memory Editor contents only
void DrawContents(void* mem_data_void_ptr, size_t mem_size, size_t base_display_addr = 0x0000)
{
u8* mem_data = (u8*)mem_data_void_ptr;
Sizes s;
CalcSizes(s, mem_size, base_display_addr);
ImGuiStyle& style = ImGui::GetStyle();
// We begin into our scrolling region with the 'ImGuiWindowFlags_NoMove' in order to prevent click from moving the window.
// This is used as a facility since our main click detection code doesn't assign an ActiveId so the click would normally be caught as a window-move.
const float height_separator = style.ItemSpacing.y;
float footer_height = 0;
if (OptShowOptions)
footer_height += height_separator + ImGui::GetFrameHeightWithSpacing() * 1;
if (OptShowDataPreview)
footer_height += height_separator + ImGui::GetFrameHeightWithSpacing() * 1 + ImGui::GetTextLineHeightWithSpacing() * 3;
ImGui::BeginChild("##scrolling", ImVec2(0, -footer_height), false, ImGuiWindowFlags_NoMove);
ImDrawList* draw_list = ImGui::GetWindowDrawList();
ImGui::PushStyleVar(ImGuiStyleVar_FramePadding, ImVec2(0, 0));
ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(0, 0));
const int line_total_count = (int)((mem_size + Cols - 1) / Cols);
ImGuiListClipper clipper(line_total_count, s.LineHeight);
const size_t visible_start_addr = clipper.DisplayStart * Cols;
const size_t visible_end_addr = clipper.DisplayEnd * Cols;
bool data_next = false;
if (ReadOnly || DataEditingAddr >= mem_size)
DataEditingAddr = (size_t)-1;
if (DataPreviewAddr >= mem_size)
DataPreviewAddr = (size_t)-1;
size_t preview_data_type_size = OptShowDataPreview ? DataTypeGetSize(PreviewDataType) : 0;
size_t data_editing_addr_backup = DataEditingAddr;
size_t data_editing_addr_next = (size_t)-1;
if (DataEditingAddr != (size_t)-1)
{
// Move cursor but only apply on next frame so scrolling with be synchronized (because currently we can't change the scrolling while the window is being rendered)
if (ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_UpArrow)) && DataEditingAddr >= (size_t)Cols) { data_editing_addr_next = DataEditingAddr - Cols; DataEditingTakeFocus = true; }
else if (ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_DownArrow)) && DataEditingAddr < mem_size - Cols) { data_editing_addr_next = DataEditingAddr + Cols; DataEditingTakeFocus = true; }
else if (ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_LeftArrow)) && DataEditingAddr > 0) { data_editing_addr_next = DataEditingAddr - 1; DataEditingTakeFocus = true; }
else if (ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_RightArrow)) && DataEditingAddr < mem_size - 1) { data_editing_addr_next = DataEditingAddr + 1; DataEditingTakeFocus = true; }
}
if (data_editing_addr_next != (size_t)-1 && (data_editing_addr_next / Cols) != (data_editing_addr_backup / Cols))
{
// Track cursor movements
const int scroll_offset = ((int)(data_editing_addr_next / Cols) - (int)(data_editing_addr_backup / Cols));
const bool scroll_desired = (scroll_offset < 0 && data_editing_addr_next < visible_start_addr + Cols * 2) || (scroll_offset > 0 && data_editing_addr_next > visible_end_addr - Cols * 2);
if (scroll_desired)
ImGui::SetScrollY(ImGui::GetScrollY() + scroll_offset * s.LineHeight);
}
// Draw vertical separator
ImVec2 window_pos = ImGui::GetWindowPos();
if (OptShowAscii)
draw_list->AddLine(ImVec2(window_pos.x + s.PosAsciiStart - s.GlyphWidth, window_pos.y), ImVec2(window_pos.x + s.PosAsciiStart - s.GlyphWidth, window_pos.y + 9999), ImGui::GetColorU32(ImGuiCol_Border));
const ImU32 color_text = ImGui::GetColorU32(ImGuiCol_Text);
const ImU32 color_disabled = OptGreyOutZeroes ? ImGui::GetColorU32(ImGuiCol_TextDisabled) : color_text;
const char* format_address = OptUpperCaseHex ? "%0*" _PRISizeT "X: " : "%0*" _PRISizeT "x: ";
const char* format_data = OptUpperCaseHex ? "%0*" _PRISizeT "X" : "%0*" _PRISizeT "x";
const char* format_range = OptUpperCaseHex ? "Range %0*" _PRISizeT "X..%0*" _PRISizeT "X" : "Range %0*" _PRISizeT "x..%0*" _PRISizeT "x";
const char* format_byte = OptUpperCaseHex ? "%02X" : "%02x";
const char* format_byte_space = OptUpperCaseHex ? "%02X " : "%02x ";
for (int line_i = clipper.DisplayStart; line_i < clipper.DisplayEnd; line_i++) // display only visible lines
{
size_t addr = (size_t)(line_i * Cols);
ImGui::Text(format_address, s.AddrDigitsCount, base_display_addr + addr);
// Draw Hexadecimal
for (int n = 0; n < Cols && addr < mem_size; n++, addr++)
{
float byte_pos_x = s.PosHexStart + s.HexCellWidth * n;
if (OptMidColsCount > 0)
byte_pos_x += (n / OptMidColsCount) * s.SpacingBetweenMidCols;
ImGui::SameLine(byte_pos_x);
// Draw highlight
bool is_highlight_from_user_range = (addr >= HighlightMin && addr < HighlightMax);
bool is_highlight_from_user_func = (HighlightFn && HighlightFn(mem_data, addr));
bool is_highlight_from_preview = (addr >= DataPreviewAddr && addr < DataPreviewAddr + preview_data_type_size);
if (is_highlight_from_user_range || is_highlight_from_user_func || is_highlight_from_preview)
{
ImVec2 pos = ImGui::GetCursorScreenPos();
float highlight_width = s.GlyphWidth * 2;
bool is_next_byte_highlighted = (addr + 1 < mem_size) && ((HighlightMax != (size_t)-1 && addr + 1 < HighlightMax) || (HighlightFn && HighlightFn(mem_data, addr + 1)));
if (is_next_byte_highlighted || (n + 1 == Cols))
{
highlight_width = s.HexCellWidth;
if (OptMidColsCount > 0 && n > 0 && (n + 1) < Cols && ((n + 1) % OptMidColsCount) == 0)
highlight_width += s.SpacingBetweenMidCols;
}
draw_list->AddRectFilled(pos, ImVec2(pos.x + highlight_width, pos.y + s.LineHeight), HighlightColor);
}
if (DataEditingAddr == addr)
{
// Display text input on current byte
bool data_write = false;
ImGui::PushID((void*)addr);
if (DataEditingTakeFocus)
{
ImGui::SetKeyboardFocusHere();
ImGui::CaptureKeyboardFromApp(true);
sprintf(AddrInputBuf, format_data, s.AddrDigitsCount, base_display_addr + addr);
sprintf(DataInputBuf, format_byte, ReadFn ? ReadFn(mem_data, addr) : mem_data[addr]);
}
ImGui::PushItemWidth(s.GlyphWidth * 2);
struct UserData
{
// FIXME: We should have a way to retrieve the text edit cursor position more easily in the API, this is rather tedious. This is such a ugly mess we may be better off not using InputText() at all here.
static int Callback(ImGuiInputTextCallbackData* data)
{
UserData* user_data = (UserData*)data->UserData;
if (!data->HasSelection())
user_data->CursorPos = data->CursorPos;
if (data->SelectionStart == 0 && data->SelectionEnd == data->BufTextLen)
{
// When not editing a byte, always rewrite its content (this is a bit tricky, since InputText technically "owns" the master copy of the buffer we edit it in there)
data->DeleteChars(0, data->BufTextLen);
data->InsertChars(0, user_data->CurrentBufOverwrite);
data->SelectionStart = 0;
data->SelectionEnd = data->CursorPos = 2;
}
return 0;
}
char CurrentBufOverwrite[3]; // Input
int CursorPos; // Output
};
UserData user_data;
user_data.CursorPos = -1;
sprintf(user_data.CurrentBufOverwrite, format_byte, ReadFn ? ReadFn(mem_data, addr) : mem_data[addr]);
ImGuiInputTextFlags flags = ImGuiInputTextFlags_CharsHexadecimal | ImGuiInputTextFlags_EnterReturnsTrue | ImGuiInputTextFlags_AutoSelectAll | ImGuiInputTextFlags_NoHorizontalScroll | ImGuiInputTextFlags_AlwaysInsertMode | ImGuiInputTextFlags_CallbackAlways;
if (ImGui::InputText("##data", DataInputBuf, 32, flags, UserData::Callback, &user_data))
data_write = data_next = true;
else if (!DataEditingTakeFocus && !ImGui::IsItemActive())
DataEditingAddr = data_editing_addr_next = (size_t)-1;
DataEditingTakeFocus = false;
ImGui::PopItemWidth();
if (user_data.CursorPos >= 2)
data_write = data_next = true;
if (data_editing_addr_next != (size_t)-1)
data_write = data_next = false;
int data_input_value;
if (data_write && sscanf(DataInputBuf, "%X", &data_input_value) == 1)
{
if (WriteFn)
WriteFn(mem_data, addr, (u8)data_input_value);
else
mem_data[addr] = (u8)data_input_value;
}
ImGui::PopID();
}
else
{
// NB: The trailing space is not visible but ensure there's no gap that the mouse cannot click on.
u8 b = ReadFn ? ReadFn(mem_data, addr) : mem_data[addr];
if (OptShowHexII)
{
if ((b >= 32 && b < 128))
ImGui::Text(".%c ", b);
else if (b == 0xFF && OptGreyOutZeroes)
ImGui::TextDisabled("## ");
else if (b == 0x00)
ImGui::Text(" ");
else
ImGui::Text(format_byte_space, b);
}
else
{
if (b == 0 && OptGreyOutZeroes)
ImGui::TextDisabled("00 ");
else
ImGui::Text(format_byte_space, b);
}
if (!ReadOnly && ImGui::IsItemHovered() && ImGui::IsMouseClicked(0))
{
DataEditingTakeFocus = true;
data_editing_addr_next = addr;
}
}
}
if (OptShowAscii)
{
// Draw ASCII values
ImGui::SameLine(s.PosAsciiStart);
ImVec2 pos = ImGui::GetCursorScreenPos();
addr = line_i * Cols;
ImGui::PushID(line_i);
if (ImGui::InvisibleButton("ascii", ImVec2(s.PosAsciiEnd - s.PosAsciiStart, s.LineHeight)))
{
DataEditingAddr = DataPreviewAddr = addr + (size_t)((ImGui::GetIO().MousePos.x - pos.x) / s.GlyphWidth);
DataEditingTakeFocus = true;
}
ImGui::PopID();
for (int n = 0; n < Cols && addr < mem_size; n++, addr++)
{
if (addr == DataEditingAddr)
{
draw_list->AddRectFilled(pos, ImVec2(pos.x + s.GlyphWidth, pos.y + s.LineHeight), ImGui::GetColorU32(ImGuiCol_FrameBg));
draw_list->AddRectFilled(pos, ImVec2(pos.x + s.GlyphWidth, pos.y + s.LineHeight), ImGui::GetColorU32(ImGuiCol_TextSelectedBg));
}
unsigned char c = ReadFn ? ReadFn(mem_data, addr) : mem_data[addr];
char display_c = (c < 32 || c >= 128) ? '.' : c;
draw_list->AddText(pos, (display_c == '.') ? color_disabled : color_text, &display_c, &display_c + 1);
pos.x += s.GlyphWidth;
}
}
}
clipper.End();
ImGui::PopStyleVar(2);
ImGui::EndChild();
if (data_next && DataEditingAddr < mem_size)
{
DataEditingAddr = DataPreviewAddr = DataEditingAddr + 1;
DataEditingTakeFocus = true;
}
else if (data_editing_addr_next != (size_t)-1)
{
DataEditingAddr = DataPreviewAddr = data_editing_addr_next;
}
bool next_show_data_preview = OptShowDataPreview;
if (OptShowOptions)
{
ImGui::Separator();
// Options menu
if (ImGui::Button("Options"))
ImGui::OpenPopup("context");
if (ImGui::BeginPopup("context"))
{
ImGui::PushItemWidth(56);
if (ImGui::DragInt("##cols", &Cols, 0.2f, 4, 32, "%d cols")) { ContentsWidthChanged = true; }
ImGui::PopItemWidth();
ImGui::Checkbox("Show Data Preview", &next_show_data_preview);
ImGui::Checkbox("Show HexII", &OptShowHexII);
if (ImGui::Checkbox("Show Ascii", &OptShowAscii)) { ContentsWidthChanged = true; }
ImGui::Checkbox("Grey out zeroes", &OptGreyOutZeroes);
ImGui::Checkbox("Uppercase Hex", &OptUpperCaseHex);
ImGui::EndPopup();
}
ImGui::SameLine();
ImGui::Text(format_range, s.AddrDigitsCount, base_display_addr, s.AddrDigitsCount, base_display_addr + mem_size - 1);
ImGui::SameLine();
ImGui::PushItemWidth((s.AddrDigitsCount + 1) * s.GlyphWidth + style.FramePadding.x * 2.0f);
if (ImGui::InputText("##addr", AddrInputBuf, 32, ImGuiInputTextFlags_CharsHexadecimal | ImGuiInputTextFlags_EnterReturnsTrue))
{
size_t goto_addr;
if (sscanf(AddrInputBuf, "%" _PRISizeT "X", &goto_addr) == 1)
{
GotoAddr = goto_addr - base_display_addr;
HighlightMin = HighlightMax = (size_t)-1;
}
}
ImGui::PopItemWidth();
if (GotoAddr != (size_t)-1)
{
if (GotoAddr < mem_size)
{
ImGui::BeginChild("##scrolling");
ImGui::SetScrollFromPosY(ImGui::GetCursorStartPos().y + (GotoAddr / Cols) * ImGui::GetTextLineHeight());
ImGui::EndChild();
DataEditingAddr = DataPreviewAddr = GotoAddr;
DataEditingTakeFocus = true;
}
GotoAddr = (size_t)-1;
}
}
if (OptShowDataPreview)
{
ImGui::Separator();
ImGui::AlignTextToFramePadding();
ImGui::Text("Preview as:");
ImGui::SameLine();
ImGui::PushItemWidth((s.GlyphWidth * 10.0f) + style.FramePadding.x * 2.0f + style.ItemInnerSpacing.x);
if (ImGui::BeginCombo("##combo_type", DataTypeGetDesc(PreviewDataType), ImGuiComboFlags_HeightLargest))
{
for (int n = 0; n < DataType_COUNT; n++)
if (ImGui::Selectable(DataTypeGetDesc((DataType)n), PreviewDataType == n))
PreviewDataType = (DataType)n;
ImGui::EndCombo();
}
ImGui::PopItemWidth();
ImGui::SameLine();
ImGui::PushItemWidth((s.GlyphWidth * 6.0f) + style.FramePadding.x * 2.0f + style.ItemInnerSpacing.x);
ImGui::Combo("##combo_endianess", &PreviewEndianess, "LE\0BE\0\0");
ImGui::PopItemWidth();
char buf[128];
float x = s.GlyphWidth * 6.0f;
bool has_value = DataPreviewAddr != (size_t)-1;
if (has_value)
DisplayPreviewData(DataPreviewAddr, mem_data, mem_size, PreviewDataType, DataFormat_Dec, buf, (size_t)IM_ARRAYSIZE(buf));
ImGui::Text("Dec"); ImGui::SameLine(x); ImGui::TextUnformatted(has_value ? buf : "N/A");
if (has_value)
DisplayPreviewData(DataPreviewAddr, mem_data, mem_size, PreviewDataType, DataFormat_Hex, buf, (size_t)IM_ARRAYSIZE(buf));
ImGui::Text("Hex"); ImGui::SameLine(x); ImGui::TextUnformatted(has_value ? buf : "N/A");
if (has_value)
DisplayPreviewData(DataPreviewAddr, mem_data, mem_size, PreviewDataType, DataFormat_Bin, buf, (size_t)IM_ARRAYSIZE(buf));
ImGui::Text("Bin"); ImGui::SameLine(x); ImGui::TextUnformatted(has_value ? buf : "N/A");
}
OptShowDataPreview = next_show_data_preview;
// Notify the main window of our ideal child content size (FIXME: we are missing an API to get the contents size from the child)
ImGui::SetCursorPosX(s.WindowWidth);
}
// Utilities for Data Preview
const char* DataTypeGetDesc(DataType data_type) const
{
const char* descs[] = { "Int8", "Uint8", "Int16", "Uint16", "Int32", "Uint32", "Int64", "Uint64", "Float", "Double" };
IM_ASSERT(data_type >= 0 && data_type < DataType_COUNT);
return descs[data_type];
}
size_t DataTypeGetSize(DataType data_type) const
{
const size_t sizes[] = { 1, 1, 2, 2, 4, 4, 8, 8, 4, 8 };
IM_ASSERT(data_type >= 0 && data_type < DataType_COUNT);
return sizes[data_type];
}
const char* DataFormatGetDesc(DataFormat data_format) const
{
const char* descs[] = { "Bin", "Dec", "Hex" };
IM_ASSERT(data_format >= 0 && data_format < DataFormat_COUNT);
return descs[data_format];
}
bool IsBigEndian() const
{
uint16_t x = 1;
char c[2];
memcpy(c, &x, 2);
return c[0] != 0;
}
static void* EndianessCopyBigEndian(void* _dst, void* _src, size_t s, int is_little_endian)
{
if (is_little_endian)
{
uint8_t* dst = (uint8_t*)_dst;
uint8_t* src = (uint8_t*)_src + s - 1;
for (int i = 0, n = (int)s; i < n; ++i)
memcpy(dst++, src--, 1);
return _dst;
}
else
{
return memcpy(_dst, _src, s);
}
}
static void* EndianessCopyLittleEndian(void* _dst, void* _src, size_t s, int is_little_endian)
{
if (is_little_endian)
{
return memcpy(_dst, _src, s);
}
else
{
uint8_t* dst = (uint8_t*)_dst;
uint8_t* src = (uint8_t*)_src + s - 1;
for (int i = 0, n = (int)s; i < n; ++i)
memcpy(dst++, src--, 1);
return _dst;
}
}
void* EndianessCopy(void *dst, void *src, size_t size) const
{
static void *(*fp)(void *, void *, size_t, int) = NULL;
if (fp == NULL)
fp = IsBigEndian() ? EndianessCopyBigEndian : EndianessCopyLittleEndian;
return fp(dst, src, size, PreviewEndianess);
}
const char* FormatBinary(const uint8_t* buf, int width) const
{
IM_ASSERT(width <= 64);
size_t out_n = 0;
static char out_buf[64 + 8 + 1];
for (int j = 0, n = width / 8; j < n; ++j)
{
for (int i = 0; i < 8; ++i)
out_buf[out_n++] = (buf[j] & (1 << (7 - i))) ? '1' : '0';
out_buf[out_n++] = ' ';
}
out_buf[out_n] = 0;
IM_ASSERT(out_n < IM_ARRAYSIZE(out_buf));
return out_buf;
}
void DisplayPreviewData(size_t addr, const u8* mem_data, size_t mem_size, DataType data_type, DataFormat data_format, char* out_buf, size_t out_buf_size) const
{
uint8_t buf[8];
size_t elem_size = DataTypeGetSize(data_type);
size_t size = addr + elem_size > mem_size ? mem_size - addr : elem_size;
if (ReadFn)
for (int i = 0, n = (int)size; i < n; ++i)
buf[i] = ReadFn(mem_data, addr + i);
else
memcpy(buf, mem_data + addr, size);
if (data_format == DataFormat_Bin)
{
snprintf(out_buf, out_buf_size, "%s", FormatBinary(buf, (int)size * 8));
return;
}
out_buf[0] = 0;
switch (data_type)
{
case DataType_S8:
{
int8_t int8 = 0;
EndianessCopy(&int8, buf, size);
if (data_format == DataFormat_Dec) { snprintf(out_buf, out_buf_size, "%hhd", int8); return; }
if (data_format == DataFormat_Hex) { snprintf(out_buf, out_buf_size, "0x%02x", int8 & 0xFF); return; }
break;
}
case DataType_U8:
{
uint8_t uint8 = 0;
EndianessCopy(&uint8, buf, size);
if (data_format == DataFormat_Dec) { snprintf(out_buf, out_buf_size, "%hhu", uint8); return; }
if (data_format == DataFormat_Hex) { snprintf(out_buf, out_buf_size, "0x%02x", uint8 & 0XFF); return; }
break;
}
case DataType_S16:
{
int16_t int16 = 0;
EndianessCopy(&int16, buf, size);
if (data_format == DataFormat_Dec) { snprintf(out_buf, out_buf_size, "%hd", int16); return; }
if (data_format == DataFormat_Hex) { snprintf(out_buf, out_buf_size, "0x%04x", int16 & 0xFFFF); return; }
break;
}
case DataType_U16:
{
uint16_t uint16 = 0;
EndianessCopy(&uint16, buf, size);
if (data_format == DataFormat_Dec) { snprintf(out_buf, out_buf_size, "%hu", uint16); return; }
if (data_format == DataFormat_Hex) { snprintf(out_buf, out_buf_size, "0x%04x", uint16 & 0xFFFF); return; }
break;
}
case DataType_S32:
{
int32_t int32 = 0;
EndianessCopy(&int32, buf, size);
if (data_format == DataFormat_Dec) { snprintf(out_buf, out_buf_size, "%d", int32); return; }
if (data_format == DataFormat_Hex) { snprintf(out_buf, out_buf_size, "0x%08x", int32); return; }
break;
}
case DataType_U32:
{
uint32_t uint32 = 0;
EndianessCopy(&uint32, buf, size);
if (data_format == DataFormat_Dec) { snprintf(out_buf, out_buf_size, "%u", uint32); return; }
if (data_format == DataFormat_Hex) { snprintf(out_buf, out_buf_size, "0x%08x", uint32); return; }
break;
}
case DataType_S64:
{
int64_t int64 = 0;
EndianessCopy(&int64, buf, size);
if (data_format == DataFormat_Dec) { snprintf(out_buf, out_buf_size, "%lld", (long long)int64); return; }
if (data_format == DataFormat_Hex) { snprintf(out_buf, out_buf_size, "0x%016llx", (long long)int64); return; }
break;
}
case DataType_U64:
{
uint64_t uint64 = 0;
EndianessCopy(&uint64, buf, size);
if (data_format == DataFormat_Dec) { snprintf(out_buf, out_buf_size, "%llu", (long long)uint64); return; }
if (data_format == DataFormat_Hex) { snprintf(out_buf, out_buf_size, "0x%016llx", (long long)uint64); return; }
break;
}
case DataType_Float:
{
float float32 = 0.0f;
EndianessCopy(&float32, buf, size);
if (data_format == DataFormat_Dec) { snprintf(out_buf, out_buf_size, "%f", float32); return; }
if (data_format == DataFormat_Hex) { snprintf(out_buf, out_buf_size, "%a", float32); return; }
break;
}
case DataType_Double:
{
double float64 = 0.0;
EndianessCopy(&float64, buf, size);
if (data_format == DataFormat_Dec) { snprintf(out_buf, out_buf_size, "%f", float64); return; }
if (data_format == DataFormat_Hex) { snprintf(out_buf, out_buf_size, "%a", float64); return; }
break;
}
} // Switch
IM_ASSERT(0); // Shouldn't reach
}
};
#undef _PRISizeT