gtpc2me4C/C++ Language Support User's Guide

TO2_getMaxDataLength-Retrieve the Maximum Data Length Value

This function returns the maximum data length value that was set when you created the collection.

Format

#include <c$to2.h>
long  TO2_getMaxDataLength (const TO2_PID_PTR   pid_ptr,
                                  TO2_ENV_PTR   env_ptr);

pid_ptr
The pointer to the persistent identifier (PID) assigned to the collection that will be interrogated.

env_ptr
The pointer to the environment as returned by the TO2_createEnv function.

Normal Return

The maximum data length will be returned as the return value.

Error Return

An error return is indicated by a zero. When zero is returned, use the TO2_getErrorCode function to determine the specific error code. For more information, see Error Handling.

The following error codes are common for this function:

TO2_ERROR_ENV

TO2_ERROR_METHOD

TO2_ERROR_PID

TO2_ERROR_ZERO_PID

Programming Considerations

This function does not use TPF transaction services on behalf of the caller.

Examples

The following example prints the maximum data length.

#include <c$to2.h>          /* Needed for TO2 API functions    */
#include <stdio.h>          /* APIs for standard I/O functions */
 
TO2_ENV_PTR    env_ptr;     /* PTR to the TO2 environment      */
TO2_PID        collect;     /* PTR to PID return field         */
long           max;         /* Maximum data length             */

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if (((max = TO2_getMaxDataLength(&collect, env_ptr)) == TO2_ERROR) { printf("TO2_getMaxDataKeyLength failed!\n"); process_error(env_ptr); } else { printf("Maximum data length is %d.\n", max); }

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