style: Use clang-format as formatter and linter tool

We want to keep the code style consistent, this first commit adds a
.clang-format in order to "document" our style code.

This patch also adds a target *linter* to Makefile which will complain
if we have any style issue on test and src dirs.

I have run the follow command to create the .clang-format file:

        $ clang-format -style=mozilla -dump-config > .clang-format

And I also made some adjusts to .clang-format changing the following
properties:

        PointerAlignment: Right
        ColumnLimit:     120

Commands executed to fix the current styling:

        $ find . -name *.h | xargs clang-format -i
        $ find . -name *.c | xargs clang-format -i

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

1 files changed, 63 insertions, 53 deletions

diff --git a/src/lexer.h b/src/lexer.h
index 9f45910..8c84745 100644
--- a/src/lexer.h
+++ b/src/lexer.h
@@ -1,77 +1,87 @@
 /*
-* 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/>.
-*/
+ * 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 "string_view.h"
+#include <stdbool.h>
 #include <stdint.h>
 #include <stdlib.h>
-#include <stdbool.h>
-#include "string_view.h"
 
-typedef enum {
-    TOKEN_NAME,
-    TOKEN_OPAREN,
-    TOKEN_CPAREN,
-    TOKEN_COLON,
-    TOKEN_SEMICOLON,
-    TOKEN_OCURLY,
-    TOKEN_CCURLY,
-    TOKEN_NUMBER,
-    TOKEN_OP,
-    TOKEN_EOF,
-    TOKEN_UNKNOWN
+typedef enum
+{
+  TOKEN_NAME,
+  TOKEN_OPAREN,
+  TOKEN_CPAREN,
+  TOKEN_COLON,
+  TOKEN_SEMICOLON,
+  TOKEN_OCURLY,
+  TOKEN_CCURLY,
+  TOKEN_NUMBER,
+  TOKEN_OP,
+  TOKEN_EOF,
+  TOKEN_UNKNOWN
 } token_kind_t;
 
-typedef struct token_t {
-  token_kind_t  kind;
+typedef struct token_t
+{
+  token_kind_t kind;
   string_view_t value;
-  char         *filepath;
-  uint32_t      row;
-  uint32_t      col;
-  uint32_t      bol;
+  char *filepath;
+  uint32_t row;
+  uint32_t col;
+  uint32_t bol;
 } token_t;
 
-
-typedef struct lexer_t {
-  char     *filepath;
-  char     *src;
-  size_t    srclen;
-  uint32_t  cur;
-  uint32_t  row;
-  uint32_t  bol;
+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_init(lexer_t *lexer, char *filepath);
 
-void lexer_next_token(lexer_t *lexer, token_t *token);
+void
+lexer_next_token(lexer_t *lexer, token_t *token);
 
-void lexer_load_file_contents(lexer_t *lexer);
+void
+lexer_load_file_contents(lexer_t *lexer);
 
-char lexer_current_char(lexer_t *lexer);
+char
+lexer_current_char(lexer_t *lexer);
 
-bool lexer_is_eof(lexer_t *lexer);
+bool
+lexer_is_eof(lexer_t *lexer);
 
-bool lexer_is_not_eof(lexer_t *lexer);
+bool
+lexer_is_not_eof(lexer_t *lexer);
 
-void lexer_drop_char(lexer_t *lexer);
+void
+lexer_drop_char(lexer_t *lexer);
 
-void lexer_step_back_to(lexer_t *lexer, token_t *token);
+void
+lexer_step_back_to(lexer_t *lexer, token_t *token);
 
-char * token_kind_to_str(token_kind_t kind);
+char *
+token_kind_to_str(token_kind_t kind);
 
 #endif /* LEXER_H */
-