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, 30 insertions, 27 deletions

diff --git a/src/pipac.c b/src/pipac.c
index 2b7b1f5..1acb4b6 100644
--- a/src/pipac.c
+++ b/src/pipac.c
@@ -1,28 +1,28 @@
 /*
-* 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/>.
+ */
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
-#include "lexer.h"
 #include "ast.h"
+#include "gas_assembly_generator.h"
+#include "lexer.h"
 #include "parser.h"
 #include "string_view.h"
-#include "gas_assembly_generator.h"
 
 void
 generate_gas_x86_64_linux(ast_node_t *func)
@@ -40,24 +40,27 @@ print_usage()
 }
 
 void
-print_tokens(lexer_t *lexer) {
+print_tokens(lexer_t *lexer)
+{
   token_t token;
   for (lexer_next_token(lexer, &token); token.kind != TOKEN_EOF; lexer_next_token(lexer, &token)) {
-    printf("%s:%d:%d: [kind=%d, value='"SVFMT"']\n", lexer->filepath, token.row + 1, token.col + 1, token.kind, SVARG(&token.value));
+    printf("%s:%d:%d: [kind=%d, value='" SVFMT "']\n",
+           lexer->filepath,
+           token.row + 1,
+           token.col + 1,
+           token.kind,
+           SVARG(&token.value));
   }
 }
 
 void
-parser_print_errors(parser_t *parser) {
-  for (int i=0; i < parser->errors_len; i++) {
+parser_print_errors(parser_t *parser)
+{
+  for (int i = 0; i < parser->errors_len; i++) {
     parser_error_t error = parser->errors[i];
 
     fprintf(
-        stderr,
-        "%s:%d:%d: [ERROR]: %s\n",
-        error.token.filepath, error.token.row + 1, error.token.col + 1,
-        error.message
-    );
+      stderr, "%s:%d:%d: [ERROR]: %s\n", error.token.filepath, error.token.row + 1, error.token.col + 1, error.message);
   }
 }
 
@@ -77,7 +80,7 @@ main(int argc, char **argv)
   parser_t parser;
   parser_init(&parser, &lexer);
 
-  ast_node_t* func = ast_node_new();
+  ast_node_t *func = ast_node_new();
 
   if (!parser_parse_function_declaration(&parser, func)) {
     parser_print_errors(&parser);