Improve macro hygiene
This commit improves hygiene and formatting of macro definitions
throughout the library. Specifically:
- It adds brackets around parameters to avoid unintended
interpretation of arguments, e.g. due to operator precedence.
- It adds uses of the `do { ... } while( 0 )` idiom for macros that
can be used as commands.
diff --git a/library/x509.c b/library/x509.c
index 6b7899f..34555bc 100644
--- a/library/x509.c
+++ b/library/x509.c
@@ -67,8 +67,15 @@
#include <time.h>
#endif
-#define CHECK(code) if( ( ret = code ) != 0 ){ return( ret ); }
-#define CHECK_RANGE(min, max, val) if( val < min || val > max ){ return( ret ); }
+#define CHECK(code) if( ( ret = ( code ) ) != 0 ){ return( ret ); }
+#define CHECK_RANGE(min, max, val) \
+ do \
+ { \
+ if( ( val ) < ( min ) || ( val ) > ( max ) ) \
+ { \
+ return( ret ); \
+ } \
+ } while( 0 )
/*
* CertificateSerialNumber ::= INTEGER