init

aurora-main/lib/imgui_config.cpp

@@ -0,0 +1,61 @@
+#include <aurora/imgui_config.h>
+
+#include <SDL3/SDL_iostream.h>
+
+#include <cstdint>
+
+ImFileHandle ImFileOpen(const char* filename, const char* mode) {
+  if (filename == nullptr || mode == nullptr) {
+    return nullptr;
+  }
+  return SDL_IOFromFile(filename, mode);
+}
+
+bool ImFileClose(ImFileHandle file) { return file == nullptr || SDL_CloseIO(file); }
+
+ImU64 ImFileGetSize(ImFileHandle file) {
+  if (file == nullptr) {
+    return static_cast<ImU64>(-1);
+  }
+  const Sint64 size = SDL_GetIOSize(file);
+  if (size < 0) {
+    return static_cast<ImU64>(-1);
+  }
+  return static_cast<ImU64>(size);
+}
+
+ImU64 ImFileRead(void* data, ImU64 size, ImU64 count, ImFileHandle file) {
+  ImU64 byteCount = size * count;
+  if (file == nullptr || data == nullptr || byteCount == 0) {
+    return 0;
+  }
+
+  ImU64 totalRead = 0;
+  auto* dst = static_cast<uint8_t*>(data);
+  while (totalRead < byteCount) {
+    const size_t read = SDL_ReadIO(file, dst + totalRead, byteCount - totalRead);
+    if (read == 0) {
+      return totalRead / size;
+    }
+    totalRead += read;
+  }
+  return count;
+}
+
+ImU64 ImFileWrite(const void* data, ImU64 size, ImU64 count, ImFileHandle file) {
+  ImU64 byteCount = size * count;
+  if (file == nullptr || data == nullptr || byteCount == 0) {
+    return 0;
+  }
+
+  ImU64 totalWritten = 0;
+  auto* src = static_cast<const std::uint8_t*>(data);
+  while (totalWritten < byteCount) {
+    const size_t written = SDL_WriteIO(file, src + totalWritten, byteCount - totalWritten);
+    if (written == 0) {
+      return totalWritten / size;
+    }
+    totalWritten += written;
+  }
+  return count;
+}