Moved read_file to a general base library

Makefile

@@ -35,7 +35,7 @@ VM_OUT=$(DIST)/ovm.out
 ## ASSEMBLY setup
 ASM_DIST=$(DIST)/asm
 ASM_SRC=asm
-ASM_CODE:=$(addprefix $(ASM_SRC)/, lexer.cpp, preprocesser.cpp)
+ASM_CODE:=$(addprefix $(ASM_SRC)/, base.cpp lexer.cpp preprocesser.cpp)
 ASM_OBJECTS:=$(ASM_CODE:$(ASM_SRC)/%.cpp=$(ASM_DIST)/%.o)
 ASM_DEPS:=$(ASM_OBJECTS:%.o=%.d) $(ASM_DIST)/main.d
 ASM_CFLAGS=$(CPPFLAGS)

asm/base.cpp

@@ -0,0 +1,32 @@
+/* Copyright (C) 2024 Aryadev Chavali
+
+ * You may distribute and modify this code under the terms of the GPLv2
+ * license.  You should have received a copy of the GPLv2 license with
+ * this file.  If not, please write to: aryadev@aryadevchavali.com.
+
+ * Created: 2024-04-14
+ * Author: Aryadev Chavali
+ * Description:
+ */
+
+#include "./base.hpp"
+
+#include <cstdio>
+
+std::optional<std::string> read_file(const char *filename)
+{
+  FILE *fp = fopen(filename, "rb");
+  if (fp)
+  {
+    std::string contents;
+    fseek(fp, 0, SEEK_END);
+    contents.resize(ftell(fp));
+    rewind(fp);
+    fread(&contents[0], 1, contents.size(), fp);
+    fclose(fp);
+
+    return contents;
+  }
+  else
+    return std::nullopt;
+}

asm/base.hpp

@@ -0,0 +1,20 @@
+/* Copyright (C) 2024 Aryadev Chavali
+
+ * You may distribute and modify this code under the terms of the GPLv2
+ * license.  You should have received a copy of the GPLv2 license with
+ * this file.  If not, please write to: aryadev@aryadevchavali.com.
+
+ * Created: 2024-04-14
+ * Author: Aryadev Chavali
+ * Description: Base library
+ */
+
+#ifndef BASE_HPP
+#define BASE_HPP
+
+#include <optional>
+#include <string>
+
+std::optional<std::string> read_file(const char *);
+
+#endif

asm/main.cpp

@@ -20,28 +20,11 @@
 
 #include <lib/inst.h>
 
+#include "./base.hpp"
 #include "./lexer.hpp"
 
 using std::pair, std::string, std::string_view, std::vector;
 
-std::optional<string> read_file(const char *filename)
-{
-  FILE *fp = fopen(filename, "rb");
-  if (fp)
-  {
-    string contents;
-    fseek(fp, 0, SEEK_END);
-    contents.resize(ftell(fp));
-    rewind(fp);
-    fread(&contents[0], 1, contents.size(), fp);
-    fclose(fp);
-
-    return contents;
-  }
-  else
-    return std::nullopt;
-}
-
 void usage(const char *program_name, FILE *fp)
 {
   fprintf(fp,