Support file reading

build.sh

@@ -1 +1 @@
-gcc src/hasm.c src/token.c -I headers
+gcc src/hasm.c src/token.c src/file_buffer.c -I headers -o hasm

examples/test.hasm

@@ -1,5 +1 @@
-%include "std.hasm"
-
-main:
-  msg: string "Hello, World!"
-  print msg
+123

headers/file_buffer.h

@@ -0,0 +1,5 @@
+#pragma once
+
+#define BUFFER_CHUNK_CAP 255
+
+void read_filesrc(char* src_path);

headers/token.h

@@ -13,4 +13,8 @@ char s_char_token[9] = {
     '(', ')', '{', '}', '[', ']', ':', ';', '=',
 };
 
-static void 
+static void expect_token_next(char token_id)
+{
+    if (token_id > 9)
+        return;
+}

src/file_buffer.c

@@ -0,0 +1,24 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <errno.h>
+#include <stdbool.h>
+
+#include "file_buffer.h"
+
+void read_filesrc(char* src_path)
+{
+    bool exists = access(src_path, F_OK) == 0;
+    if (!exists) {
+        fprintf(stderr, "Source does not exist!");
+        return;
+    }
+
+    FILE* src_file = fopen(src_path, "r");
+    char buffer[BUFFER_CHUNK_CAP];
+
+    fgets(buffer, BUFFER_CHUNK_CAP, (FILE*)src_file);
+
+    fclose(src_file);
+
+    printf("%s\n", buffer);
+}

src/hasm.c

@@ -1,5 +1,9 @@
 #include <stdio.h>
 
-int main(int argc, char** argv) {
+#include "file_buffer.h"
+
+int main(int argc, char** argv) 
+{
+    read_filesrc("examples/test.hasm");
     return 0;
 }

src/hasm.h

@@ -0,0 +1,4 @@
+#pragma once
+#include <stdint.h>
+
+static uint64_t c_source_letter = 0;