From 20d28e80a5c861a9d5f449ea911ab75b4f37ad0d Mon Sep 17 00:00:00 2001
From: Jef <jef@targetspot.com>
Date: Tue, 24 Sep 2024 14:54:57 +0200
Subject: Initial community commit

---
 Src/filereader/ResourceReader.cpp | 115 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 Src/filereader/ResourceReader.cpp

(limited to 'Src/filereader/ResourceReader.cpp')

diff --git a/Src/filereader/ResourceReader.cpp b/Src/filereader/ResourceReader.cpp
new file mode 100644
index 00000000..a00e4776
--- /dev/null
+++ b/Src/filereader/ResourceReader.cpp
@@ -0,0 +1,115 @@
+#include "ResourceReader.h"
+
+ResourceReader::ResourceReader() : data(NULL), g(NULL), ptr(0)
+{}
+
+int ResourceReader::open(const wchar_t *filename, int mode)
+{
+	if (_wcsnicmp(filename, L"res://", 6)) return 0;
+	filename += 6;
+	wchar_t blah[MAX_PATH];
+	lstrcpynW(blah, filename, MAX_PATH);
+
+	wchar_t *p = blah;
+	while (p && *p && *p != ',') p++;
+	if (p && *p != ',') return 0;
+	if (p) *p++ = 0;
+	HINSTANCE hInst = (HINSTANCE)_wtoi64(blah);
+	int id = _wtoi(p);
+
+	HRSRC r = FindResource(hInst, MAKEINTRESOURCE(id), RT_RCDATA);
+	if (r == NULL) return 0;
+	g = LoadResource(hInst, r);
+	if (g == NULL) return 0;
+	data = (char*)LockResource(g);
+	if (data == NULL)
+	{
+		FreeResource(g); // see win32 doc
+		g = NULL;
+		return 0;
+	}
+	size = SizeofResource(hInst, r);
+	ptr = 0;
+
+	return 1;
+}
+
+size_t ResourceReader::read(__int8 *buffer, size_t length)
+{
+	size_t s = min(size - ptr, length);
+	if (s)
+		memcpy(buffer, data + ptr, s);
+	ptr += s;
+	return s;
+}
+
+size_t ResourceReader::write(const __int8 *buffer, size_t length)
+{
+
+	return 0;
+}
+
+void ResourceReader::close()
+{
+	if (g)
+	{
+		UnlockResource(g);
+		FreeResource(g); // see win32 doc
+		g = NULL;
+		data = NULL;
+	}
+}
+
+unsigned __int64 ResourceReader::getPos()
+{
+	return ptr;
+}
+
+unsigned __int64 ResourceReader::getLength()
+{
+	return size;
+}
+
+int ResourceReader::canSeek()
+{
+	return 1;
+}
+
+int ResourceReader::seek(unsigned __int64 position)
+{
+	ptr = (size_t)min(position, size); 
+	return 1;
+}
+
+int ResourceReader::exists(const wchar_t *filename)
+{
+	return 1;
+} // always exists if open succeeded
+
+
+#define CBCLASS ResourceReader
+START_DISPATCH;
+//  CB(ISMINE, isMine);
+  CB(OPEN, open);
+  CB(READ, read);
+  CB(WRITE, write);
+  VCB(CLOSE, close);
+//  VCB(ABORT, abort);
+  CB(GETLENGTH, getLength);
+  CB(GETPOS, getPos);
+  CB(CANSEEK, canSeek);
+//  CB(SEEK, seek);
+//  CB(HASHEADERS,hasHeaders);
+//  CB(GETHEADER,getHeader);
+  CB(EXISTS,exists);
+//  CB(REMOVE,remove);
+//  CB(REMOVEUNDOABLE,removeUndoable);
+//  CB(MOVE,move);
+//  CB(BYTESAVAILABLE,bytesAvailable);
+//  VCB(SETMETADATACALLBACK,setMetaDataCallback);
+//  CB(CANPREFETCH,canPrefetch);
+//  CB(CANSETEOF, canSetEOF);
+//  CB(SETEOF, setEOF);
+END_DISPATCH;
+#undef CBCLASS
+
-- 
cgit