Add a tool to fix header guards, apply globally

Identifiers starting with _ are reserved, fix those.
Wrote a tool to do it and applied it globally, why not.

PUBLISHED_FROM=db0fa27c90cbfb06ed06469406f9867c5a5bd3c4

examples/api_server/db_plugin.h

@@ -3,8 +3,8 @@
  * All rights reserved
  */
 
-#ifndef DB_PLUGIN_HEADER_DEFINED
-#define DB_PLUGIN_HEADER_DEFINED
+#ifndef CS_MONGOOSE_EXAMPLES_API_SERVER_DB_PLUGIN_H_
+#define CS_MONGOOSE_EXAMPLES_API_SERVER_DB_PLUGIN_H_
 
 #include "../../mongoose.h"
 
@@ -16,4 +16,4 @@ enum { API_OP_GET, API_OP_SET, API_OP_DEL };
 void db_op(struct mg_connection *nc, const struct http_message *hm,
            const struct mg_str *key, void *db, int op);
 
-#endif /* DB_PLUGIN_HEADER_DEFINED */
+#endif /* CS_MONGOOSE_EXAMPLES_API_SERVER_DB_PLUGIN_H_ */

examples/api_server/sqlite3.h

@@ -30,8 +30,8 @@
 ** the version number) and changes its name to "sqlite3.h" as
 ** part of the build process.
 */
-#ifndef _SQLITE3_H_
-#define _SQLITE3_H_
+#ifndef CS_MONGOOSE_EXAMPLES_API_SERVER_SQLITE3_H_
+#define CS_MONGOOSE_EXAMPLES_API_SERVER_SQLITE3_H_
 #include <stdarg.h>     /* Needed for the definition of va_list */
 
 /*
@@ -7241,5 +7241,5 @@ struct sqlite3_rtree_geometry {
 }  /* end of the 'extern "C"' block */
 #endif
 
-#endif  /* ifndef _SQLITE3RTREE_H_ */
+#endif /* CS_MONGOOSE_EXAMPLES_API_SERVER_SQLITE3_H_ */
 

mongoose.c

@@ -7,8 +7,8 @@
  * All rights reserved
  */
 
-#ifndef MG_INTERNAL_HEADER_INCLUDED
-#define MG_INTERNAL_HEADER_INCLUDED
+#ifndef CS_MONGOOSE_SRC_INTERNAL_H_
+#define CS_MONGOOSE_SRC_INTERNAL_H_
 
 #ifndef MG_MALLOC
 #define MG_MALLOC malloc
@@ -122,7 +122,7 @@ struct ctl_msg {
 extern void *(*test_malloc)(size_t size);
 extern void *(*test_calloc)(size_t count, size_t size);
 
-#endif /* MG_INTERNAL_HEADER_INCLUDED */
+#endif /* CS_MONGOOSE_SRC_INTERNAL_H_ */
 #ifdef MG_MODULE_LINES
 #line 1 "./src/../../common/base64.c"
 #endif