writing value to pointer

From: Frank Benoit (nospam_at_xyz.com)
Date: 07/17/03 

Date: Thu, 17 Jul 2003 15:30:33 +0200

On ARM with GCC 2.95.3:

typedef unsigned char uint8;
typedef unsigned short uint16;

uint8 buffer[100];

uint16 * ptr0 = ( uint16 * ) & buffer[0];
uint16 * ptr1 = ( uint16 * ) & buffer[1];
uint16 * ptr2 = ( uint16 * ) & buffer[2];

*ptr0 = 0x1234; // OK, writes into buffer[0-1]
*ptr1 = 0x1234; // Error, writes into buffer[0-1]
*ptr2 = 0x1234; // OK, writes into buffer[2-3]

//------------------------------------
How can I force the compiler to generate code, that works correct?

Frank
benoit at tionex de

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