lexer: Extract lexer.c and lexer.h from pipa.c

Signed-off-by: Johnny Richard <johnny@johnnyrichard.com>

1 files changed, 68 insertions, 0 deletions

diff --git a/src/lexer.h b/src/lexer.h
new file mode 100644
index 0000000..29cfc11
--- /dev/null
+++ b/src/lexer.h
@@ -0,0 +1,68 @@
+/*
+* Copyright (C) 2023 Johnny Richard
+*
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+#ifndef LEXER_H
+#define LEXER_H
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdbool.h>
+
+typedef enum {
+    TOKEN_NAME,
+    TOKEN_OPAREN,
+    TOKEN_CPAREN,
+    TOKEN_COLON,
+    TOKEN_SEMICOLON,
+    TOKEN_OCURLY,
+    TOKEN_CCURLY,
+    TOKEN_NUMBER,
+    TOKEN_EOF
+} token_kind_t;
+
+typedef struct token_t {
+  token_kind_t  kind;
+  char         *value;
+  uint32_t      row;
+  uint32_t      col;
+} token_t;
+
+
+typedef struct lexer_t {
+  char     *filepath;
+  char     *src;
+  size_t    srclen;
+  uint32_t  cur;
+  uint32_t  row;
+  uint32_t  bol;
+} lexer_t;
+
+void lexer_init(lexer_t *lexer, char *filepath);
+
+void lexer_next_token(lexer_t *lexer, token_t *token);
+
+void lexer_load_file_contents(lexer_t *lexer);
+
+char lexer_current_char(lexer_t *lexer);
+
+bool lexer_is_eof(lexer_t *lexer);
+
+bool lexer_is_not_eof(lexer_t *lexer);
+
+void lexer_drop_char(lexer_t *lexer);
+
+#endif /* LEXER_H */
+