5 files changed, 122 insertions, 3 deletions

diff --git a/include/lex.h b/include/lex.h
index bdfd32f..ab09baf 100644
--- a/include/lex.h
+++ b/include/lex.h
@@ -30,6 +30,7 @@
 #define TOKEN_MINUS             22
 #define TOKEN_STAR              23
 #define TOKEN_SLASH             24
+#define TOKEN_BANG              25
 
 const char* lex_get_token_name(int id);
 
@@ -40,8 +41,7 @@ const char* lex_get_token_name(int id);
 
 struct token {
 	int type;
-//	size_t line;
-//	size_t linepos;
+	size_t line;
 	size_t length;
 	char *lexeme;
 };
diff --git a/include/lib/arena.h b/include/lib/arena.h
new file mode 100644
index 0000000..9d3cb38
--- /dev/null
+++ b/include/lib/arena.h
@@ -0,0 +1,31 @@
+/**
+ * @file arena.h
+ * @author x221e
+ * @brief linear arena-allocation without relocation
+ * @description
+ * This will be a linear arena allocation,
+ * no free functionality exists right now.
+ *
+ * @todo create a larger arena structure that would hold regions
+ */
+
+#ifndef ARENA_H
+#define ARENA_H
+
+#include <stddef.h>
+
+// 2 MiB regions
+#define REGION_MAX_CAPACITY    1024*1024*2 
+
+struct region { // or arena?
+	size_t capacity;
+	size_t size;
+	void *end;
+	void *start;
+};
+
+int region_init(struct region *r);
+void *region_alloc(struct region *r, size_t b);
+int region_pop(struct region *r, size_t b);
+
+#endif
diff --git a/include/lib/vector.h b/include/lib/vector.h
index 33e5b97..e0cc523 100644
--- a/include/lib/vector.h
+++ b/include/lib/vector.h
@@ -16,6 +16,6 @@ struct vector {
 int vector_init(struct vector *v);
 int vector_resize(struct vector *v, size_t nc);
 int vector_emplace_back(struct vector *v, void *p);
-int vector_deinit(struct vector *v);
+int vector_free(struct vector *v);
 
 #endif
diff --git a/include/parser.h b/include/parser.h
new file mode 100644
index 0000000..a927475
--- /dev/null
+++ b/include/parser.h
@@ -0,0 +1,79 @@
+/**
+ * @file parser.h
+ * @author x221e
+ * @brief parser
+ * @description
+ * I am opting-in to AST producing compiler design. It is not strictly
+ * needed in this context, however, it will produce optimization benefits
+ * in the future.
+ *
+ * @warning DEFINETLY NEEDS ARENA ALLOC IMPL // prototyping one under lib/
+ */
+
+#ifndef PARSER_H
+#define PARSER_H
+
+#include <stddef.h>
+
+#include <lex.h>
+
+typedef struct vector vector;
+
+struct parser {
+	struct region *tokens;
+	struct vector *result; //TODO: replace with arena,, temporary
+	struct region *buffer;
+	size_t size;
+	size_t pos;
+
+	int error;
+};
+
+enum node_type { // Or should I use macros???
+	N_INVALID = -1,
+	N_EXPR = 0,
+	N_LITERAL = 1,
+	N_UNARY,
+	N_BINARY,
+};
+
+enum data_type {
+	DT_INVALID = -1,
+	DT_UNSIGNED64,
+	DT_UNSIGNED32,
+	DT_UNSIGNED16,
+	DT_UNSIGNED8,
+};
+
+struct node_primary {
+	enum node_type ntype;
+	enum data_type type;
+
+	int is_number;
+	union {
+		size_t number;
+		char* str;
+	} value;
+};
+
+struct node_unary {
+	enum node_type ntype;
+
+	struct token operator;
+	void *expr;
+};
+
+struct node_binary {
+	enum node_type ntype;
+	struct token operator;
+	void *left;
+	void *right;
+};
+
+struct node {
+	enum node_type ntype;
+};
+
+void parser_parse(struct parser *p);
+
+#endif
diff --git a/include/passdbg.h b/include/passdbg.h
new file mode 100644
index 0000000..15643d8
--- /dev/null
+++ b/include/passdbg.h
@@ -0,0 +1,9 @@
+#ifndef PASSDBG_H
+#define PASSDBG_H
+
+void passdbg_primary(void *n);
+void passdbg_unary(void *n);
+void passdbg_binary(void *n);
+void passdbg_walk(void *n);
+
+#endif