From 3fba4e9b487d06fa1ca0983a68161f581cb2608a Mon Sep 17 00:00:00 2001
From: Ratstail91 <kayneruse@gmail.com>
Date: Mon, 12 Jun 2023 00:37:45 +1000
Subject: [PATCH] Updated Toy

---
 Toy              |  2 +-
 box/repl_tools.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++
 box/repl_tools.h |  1 +
 3 files changed, 58 insertions(+), 1 deletion(-)

diff --git a/Toy b/Toy
index d3eb31d..50d03e2 160000
--- a/Toy
+++ b/Toy
@@ -1 +1 @@
-Subproject commit d3eb31d96460814003616b5720266ddce916bf32
+Subproject commit 50d03e28fc4ab1b7b6194006a7bbbb210f8aa19f
diff --git a/box/repl_tools.c b/box/repl_tools.c
index fd44bd7..63090f9 100644
--- a/box/repl_tools.c
+++ b/box/repl_tools.c
@@ -149,3 +149,59 @@ void Toy_runSourceFile(const char* fname) {
 	Toy_runSource(source);
 	free((void*)source);
 }
+
+//utils for debugging the header
+static unsigned char readByte(const unsigned char* tb, int* count) {
+	unsigned char ret = *(unsigned char*)(tb + *count);
+	*count += 1;
+	return ret;
+}
+
+static const char* readString(const unsigned char* tb, int* count) {
+	const unsigned char* ret = tb + *count;
+	*count += strlen((char*)ret) + 1; //+1 for null character
+	return (const char*)ret;
+}
+
+void Toy_parseBinaryFileHeader(const char* fname) {
+	size_t size = 0; //not used
+	const unsigned char* tb = Toy_readFile(fname, &size);
+	if (!tb || size < 4) {
+		return;
+	}
+
+	int count = 0;
+
+	//header section
+	const unsigned char major = readByte(tb, &count);
+	const unsigned char minor = readByte(tb, &count);
+	const unsigned char patch = readByte(tb, &count);
+
+	const char* build = readString(tb, &count);
+
+	printf("Toy Programming Language Interpreter Version %d.%d.%d (interpreter built on %s)\n\n", TOY_VERSION_MAJOR, TOY_VERSION_MINOR, TOY_VERSION_PATCH, TOY_VERSION_BUILD);
+
+	printf("Toy Programming Language Bytecode Version ");
+
+	//print the output
+	if (major == TOY_VERSION_MAJOR && minor == TOY_VERSION_MINOR && patch == TOY_VERSION_PATCH) {
+		printf("%d.%d.%d", major, minor, patch);
+	}
+	else {
+		printf(TOY_CC_FONT_YELLOW TOY_CC_BACK_BLACK "%d.%d.%d" TOY_CC_RESET, major, minor, patch);
+	}
+
+	printf(" (interpreter built on ");
+
+	if (strncmp(build, TOY_VERSION_BUILD, strlen(TOY_VERSION_BUILD)) == 0) {
+		printf("%s", build);
+	}
+	else {
+		printf(TOY_CC_FONT_YELLOW TOY_CC_BACK_BLACK "%s" TOY_CC_RESET, build);
+	}
+
+	printf(")\n");
+
+	//cleanup
+	free((void*)tb);
+}
\ No newline at end of file
diff --git a/box/repl_tools.h b/box/repl_tools.h
index 235cef8..5fda23e 100644
--- a/box/repl_tools.h
+++ b/box/repl_tools.h
@@ -12,3 +12,4 @@ void Toy_runBinaryFile(const char* fname);
 void Toy_runSource(const char* source);
 void Toy_runSourceFile(const char* fname);
 
+void Toy_parseBinaryFileHeader(const char* fname);
\ No newline at end of file