Manipulating binary strings

 

Strings of binary data are declared as one of the MQBYTEn data types. Whenever you copy, compare, or set fields of this type, use the C functions memcpy, memcmp, or memset:

#include <string.h>
#include "cmqc.h"

MQMD MyMsgDesc;

memcpy(MyMsgDesc.MsgId,           /* set "MsgId" field to nulls    */
       MQMI_NONE,                 /* ...using named constant       */
       sizeof(MyMsgDesc.MsgId));

memset(MyMsgDesc.CorrelId,        /* set "CorrelId" field to nulls */
       0x00,                      /* ...using a different method   */
       sizeof(MQBYTE24));

Do not use the string functions strcpy, strcmp, strncpy, or strncmp because these do not work correctly with data declared as MQBYTE24.

 

Parent topic:

Coding in C

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