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, 32 insertions, 38 deletions

diff --git a/test/lexer_test.c b/test/lexer_test.c
index 0eebfe5..abfac16 100644
--- a/test/lexer_test.c
+++ b/test/lexer_test.c
@@ -1,32 +1,32 @@
 /*
-* Copyright (C) 2023 Carlos Maniero
-*
-* 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 Carlos Maniero
+ *
+ * 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/>.
+ */
 #define MUNIT_ENABLE_ASSERT_ALIASES
-#include "munit.h"
 #include "lexer.h"
+#include "munit.h"
 
 void
 make_lexer_from_static_src(lexer_t *lexer, char *src, int srclen)
 {
-  lexer->srclen   = 0;
-  lexer->cur      = 0;
-  lexer->row      = 0;
-  lexer->bol      = 0;
-  lexer->src      = src;
-  lexer->srclen   = srclen;
+  lexer->srclen = 0;
+  lexer->cur = 0;
+  lexer->row = 0;
+  lexer->bol = 0;
+  lexer->src = src;
+  lexer->srclen = srclen;
 }
 
 void
@@ -51,27 +51,24 @@ assert_token_at(char *source, int token_index, token_kind_t expected_kind, char
   assert_string_equal(expected, actual);
 }
 
-
 static MunitResult
-test_tokenize_number(const  MunitParameter params[],
-                     void  *user_data_or_fixture)
+test_tokenize_number(const MunitParameter params[], void *user_data_or_fixture)
 {
-  assert_token_at("1",       0, TOKEN_NUMBER, "1");
-  assert_token_at(" 13 ",    0, TOKEN_NUMBER, "13");
+  assert_token_at("1", 0, TOKEN_NUMBER, "1");
+  assert_token_at(" 13 ", 0, TOKEN_NUMBER, "13");
   assert_token_at(" \n 13 ", 0, TOKEN_NUMBER, "13");
 
   return MUNIT_OK;
 }
 
 static MunitResult
-test_tokenize_op(const  MunitParameter params[],
-                 void  *user_data_or_fixture)
+test_tokenize_op(const MunitParameter params[], void *user_data_or_fixture)
 {
-  assert_token_at("  + 2",  0, TOKEN_OP, "+");
+  assert_token_at("  + 2", 0, TOKEN_OP, "+");
   assert_token_at("  - \n", 0, TOKEN_OP, "-");
-  assert_token_at("  * ;",  0, TOKEN_OP, "*");
-  assert_token_at("  / ",   0, TOKEN_OP, "/");
-  assert_token_at("  = ",   0, TOKEN_OP, "=");
+  assert_token_at("  * ;", 0, TOKEN_OP, "*");
+  assert_token_at("  / ", 0, TOKEN_OP, "/");
+  assert_token_at("  = ", 0, TOKEN_OP, "=");
 
   assert_token_at("1 * 2", 0, TOKEN_NUMBER, "1");
   assert_token_at("1 * 2", 1, TOKEN_OP, "*");
@@ -81,8 +78,7 @@ test_tokenize_op(const  MunitParameter params[],
 }
 
 static MunitResult
-test_tokenize_unknown(const  MunitParameter params[],
-                      void  *user_data_or_fixture)
+test_tokenize_unknown(const MunitParameter params[], void *user_data_or_fixture)
 {
   assert_token_at(" @ ", 0, TOKEN_UNKNOWN, "@");
   assert_token_at(" $ ", 0, TOKEN_UNKNOWN, "$");
@@ -97,9 +93,7 @@ static MunitTest tests[] = {
   { NULL, NULL, NULL, NULL, MUNIT_TEST_OPTION_NONE, NULL }
 };
 
-static const MunitSuite suite = {
-  "/lexer_test", tests, NULL, 1, MUNIT_SUITE_OPTION_NONE
-};
+static const MunitSuite suite = { "/lexer_test", tests, NULL, 1, MUNIT_SUITE_OPTION_NONE };
 
 int
 main(int argc, char *argv[])