From 0b815bdc8d631cb386c3fd288a9d861d32e24f34 Mon Sep 17 00:00:00 2001
From: Matthew <matthew@sleepy.day>
Date: Fri, 21 Nov 2025 16:34:14 +1100
Subject: [PATCH] add read file util

---
 platform.d | 60 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 util.d     |  2 +-
 2 files changed, 61 insertions(+), 1 deletion(-)

diff --git a/platform.d b/platform.d
index bc7f04b..4e8ebe8 100644
--- a/platform.d
+++ b/platform.d
@@ -4,6 +4,7 @@ import dlib.aliases;
 import dlib.alloc : Reset;
 import dlib.alloc;
 import dlib.util;
+import dlib.math;
 
 import includes;
 
@@ -15,6 +16,8 @@ import core.time;
 import core.volatile;
 import core.atomic;
 
+import core.stdc.stdio : FilePtr = FILE, FRead = fread;
+
 const WINDOW_EDGE_BUFFER = 50;
 
 enum Input : u32
@@ -392,6 +395,7 @@ import core.sys.posix.pthread : PThread = pthread_t,
 
 import core.stdc.string : strlen;
 
+
 const u32 X11_CB_TRANSFER_SIZE_DEFAULT = 1048576;
 const u32 X11_TIMEOUT_DEFAULT = 1500;
 
@@ -1884,6 +1888,49 @@ Kill()
 
 }
 
+// TODO: replace this with proper OS stuff
+u8[]
+LoadFile(Arena* arena, string file_name)
+{
+	u8[] data;
+
+	const u64 buf_size = MB(8);
+	static u8[] buf;
+	if(!buf) 
+	{
+		buf = Alloc!(u8)(buf_size);
+	}
+
+	File f;
+	try
+	{
+		f = File(file_name, "rb");
+	}
+	catch(Exception e)
+	{
+		
+	}
+
+	if(f.isOpen)
+	{
+		u64 size = f.size();
+		data = Alloc!(u8)(arena, size);
+
+		auto fp = f.getFP();
+		for(u64 pos = 0; pos < size;)
+		{
+			u64 length = Min(size-pos, buf_size);
+			fread(data.ptr+pos, 1, length, fp);
+			pos -= length;
+		}
+	}
+
+	f.flush();
+	f.close();
+
+	return data;
+}
+
 unittest
 {
 	{ // Keys
@@ -1911,5 +1958,18 @@ unittest
 
 		assert(wd == s);
 	}
+
+	{ // File Reads
+		Arena arena = CreateArena(MB(2));
+
+		u8[] data_valid, data_test;
+
+		File f = File("platform.d", "rb");
+
+		data_valid = f.rawRead(new u8[f.size()]);
+		data_test  = LoadFile(&arena, "platform.d");
+
+		assert(data_valid == data_test);
+	}
 }
 
diff --git a/util.d b/util.d
index c15bc4e..5f2aee5 100644
--- a/util.d
+++ b/util.d
@@ -77,7 +77,7 @@ Logf(Args...)(string fmt, Args args, string prefix = "INFO", string func = __FUN
 	try
 	{
 		debug writef("[%s] FUNC: [%s]: ", prefix, func);
-		else  write("[%s]: ", prefix);
+		else  writef("[%s]: ", prefix);
 		writefln(fmt, args);
 	}
 	catch (Exception e)