Initial commit, basic lexer structure

src/lexer.h

@@ -0,0 +1,56 @@
+#ifndef INCLUDE_SRC_LEXER_H_
+#define INCLUDE_SRC_LEXER_H_
+
+#include "error.h"
+#include <stddef.h>
+#include <stdio.h>
+
+extern error_t *err_eof;
+
+typedef enum {
+    TOKEN_ERROR,
+    TOKEN_IDENTIFIER,
+    TOKEN_DECIMAL,
+    TOKEN_HEXADECIMAL,
+    TOKEN_OCTAL,
+    TOKEN_BINARY,
+    TOKEN_CHAR,
+    TOKEN_STRING,
+    TOKEN_COLON,
+    TOKEN_COMMA,
+    TOKEN_LBRACKET,
+    TOKEN_RBRACKET,
+    TOKEN_PLUS,
+    TOKEN_MINUS,
+    TOKEN_ASTERISK,
+    TOKEN_DOT,
+    TOKEN_COMMENT,
+    TOKEN_NEWLINE,
+    TOKEN_WHITESPACE,
+} lexer_token_id_t;
+
+typedef struct lexer_token {
+    lexer_token_id_t id;
+    size_t line_number;
+    size_t character_number;
+    char *value;
+    const char *explanation;
+} lexer_token_t;
+
+constexpr size_t lexer_buffer_size = 32;
+
+typedef struct lexer {
+    size_t line_number;
+    size_t character_number;
+    size_t buffer_count;
+    char buffer[lexer_buffer_size];
+    FILE *fp;
+} lexer_t;
+
+void lexer_close(lexer_t *lex);
+error_t *lexer_open(lexer_t *lex, char *path);
+error_t *lexer_next(lexer_t *lex, lexer_token_t *token);
+void lexer_token_print(lexer_token_t *token);
+void lexer_token_cleanup(lexer_token_t *token);
+
+#endif // INCLUDE_SRC_LEXER_H_