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Improve macro hygiene

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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.
This commit is contained in:
Hanno Becker 2018-10-15 12:01:35 +01:00 • committed by Simon Butcher
parent 9c99dc862c
commit 1eeca41472
23 changed files with 325 additions and 252 deletions
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34
programs/ssl/ssl_server2.c
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@ -615,11 +615,14 @@ static int get_auth_mode( const char *s )
* Used by sni_parse and psk_parse to handle coma-separated lists
*/
#define GET_ITEM( dst ) \
dst = p; \
while( *p != ',' ) \
if( ++p > end ) \
goto error; \
*p++ = '\0';
do \
{ \
(dst) = p; \
while( *p != ',' ) \
if( ++p > end ) \
goto error; \
*p++ = '\0'; \
} while( 0 )
#if defined(SNI_OPTION)
typedef struct _sni_entry sni_entry;
@ -776,15 +779,18 @@ int sni_callback( void *p_info, mbedtls_ssl_context *ssl,
#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
#define HEX2NUM( c ) \
if( c >= '0' && c <= '9' ) \
c -= '0'; \
else if( c >= 'a' && c <= 'f' ) \
c -= 'a' - 10; \
else if( c >= 'A' && c <= 'F' ) \
c -= 'A' - 10; \
else \
return( -1 );
#define HEX2NUM( c ) \
do \
{ \
if( (c) >= '0' && (c) <= '9' ) \
(c) -= '0'; \
else if( (c) >= 'a' && (c) <= 'f' ) \
(c) -= 'a' - 10; \
else if( (c) >= 'A' && (c) <= 'F' ) \
(c) -= 'A' - 10; \
else \
return( -1 ); \
} while( 0 )
/*
* Convert a hex string to bytes.