commit cd84d76e9b1a3b2c82d5975561aea493777abd51
author Joe Subbiani <joe.subbiani@arm.com> Thu Jul 08 14:59:52 2021 +0100
committer Joe Subbiani <joe.subbiani@arm.com> Thu Aug 19 09:55:41 2021 +0100
tree 1af7424f0eaa730b1b3aeeb2db19c3ba902fb0c0
parent 6a5063149756e1d5d12b0497867f5c22aaa8100e

Add Character byte reading macros

These cast to an unsigned char rather than a uint8_t
like with MBEDTLS_BYTE_x
These save alot of space and will improve maintence by
replacing the appropriate code with MBEDTLS_CHAR_x

Signed-off-by: Joe Subbiani <joe.subbiani@arm.com>

library/asn1write.c

diff --git a/library/asn1write.c b/library/asn1write.c
index 0289e89..8555767 100644
--- a/library/asn1write.c
+++ b/library/asn1write.c
@@ -60,8 +60,8 @@
         if( *p - start < 3 )
             return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
 
-        *--(*p) = ( len       ) & 0xFF;
-        *--(*p) = ( len >>  8 ) & 0xFF;
+        *--(*p) = MBEDTLS_CHAR_0( len );
+        *--(*p) = MBEDTLS_CHAR_1( len );
         *--(*p) = 0x82;
         return( 3 );
     }
@@ -71,9 +71,9 @@
         if( *p - start < 4 )
             return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
 
-        *--(*p) = ( len       ) & 0xFF;
-        *--(*p) = ( len >>  8 ) & 0xFF;
-        *--(*p) = ( len >> 16 ) & 0xFF;
+        *--(*p) = MBEDTLS_CHAR_0( len );
+        *--(*p) = MBEDTLS_CHAR_1( len );
+        *--(*p) = MBEDTLS_CHAR_2( len );
         *--(*p) = 0x83;
         return( 4 );
     }
@@ -85,10 +85,10 @@
         if( *p - start < 5 )
             return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
 
-        *--(*p) = ( len       ) & 0xFF;
-        *--(*p) = ( len >>  8 ) & 0xFF;
-        *--(*p) = ( len >> 16 ) & 0xFF;
-        *--(*p) = ( len >> 24 ) & 0xFF;
+        *--(*p) = MBEDTLS_CHAR_0( len );
+        *--(*p) = MBEDTLS_CHAR_1( len );
+        *--(*p) = MBEDTLS_CHAR_2( len );
+        *--(*p) = MBEDTLS_CHAR_3( len );
         *--(*p) = 0x84;
         return( 5 );
     }