style: add .clang-format and reformat source

Author: DavidLeeds

.clang-format

@@ -0,0 +1,26 @@
+AlignConsecutiveMacros: AcrossEmptyLinesAndComments
+AllowShortBlocksOnASingleLine: false
+AllowShortFunctionsOnASingleLine: Empty
+AllowShortIfStatementsOnASingleLine: Never
+AllowShortLambdasOnASingleLine: Empty
+AllowShortLoopsOnASingleLine: false
+AlwaysBreakTemplateDeclarations: Yes
+BreakBeforeTernaryOperators: false
+BreakBeforeBraces: Custom
+BraceWrapping:
+  AfterFunction: true
+ColumnLimit: 120
+ForEachMacros:
+  [
+    hashmap_foreach,
+    hashmap_foreach_safe,
+    hashmap_foreach_key,
+    hashmap_foreach_key_safe,
+    hashmap_foreach_data,
+    hashmap_foreach_data_safe,
+  ]
+IndentWidth: 4
+InsertBraces: true
+KeepEmptyLinesAtTheStartOfBlocks: false
+WhitespaceSensitiveMacros: [hashmap_*]
+SpaceBeforeParens: ControlStatementsExceptForEachMacros

examples/hashmap_example.c

@@ -5,11 +5,11 @@
  * it under the terms of the MIT license. See LICENSE for details.
  */
 
-#include <stdlib.h>
+#include <errno.h>
 #include <stdbool.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
-#include <errno.h>
 
 #include <hashmap.h>
 
@@ -95,4 +95,3 @@ int main(int argc, char **argv)
 
     return 0;
 }
-