OpENer/source/src/cip/cipstring.c

/*******************************************************************************
 * Copyright (c) 2019, Rockwell Automation, Inc.
 * All rights reserved.
 *
 ******************************************************************************/

/** @file
 * @brief Implements functions to operate on CIP string types
 *
 * Some functions to create CIP string types from C strings or data buffers.
 */

#include "cipstring.h"

#include <stdlib.h>
#include <string.h>

#include "opener_api.h"


CipString *SetCipStringByData
(
   CipString *p_cip_string,
   size_t str_len,
   const EipUint8 *p_data
)
{
    CipString   *p_result = p_cip_string;

    if (NULL != p_cip_string->string) {
        CipFree(p_cip_string->string);
        p_cip_string->string = NULL;
        p_cip_string->length = 0;
    }

    if (str_len) {
        /* Allocate & clear +1 bytes for the trailing '\0' character. */
        p_cip_string->string = CipCalloc(str_len+1, sizeof (EipUint8));
        if (NULL == p_cip_string->string) {
            p_result = NULL;
        }
        else {
            p_cip_string->length = str_len;
            memcpy(p_cip_string->string, p_data, str_len);
        }
    }
    return p_result;
}


CipString *SetCipStringByCstr
(
  CipString *p_cip_string,
  const char *p_string
)
{
    return SetCipStringByData(p_cip_string, strlen(p_string),
                              (const EipByte *)p_string);
}


CipShortString *SetCipShortStringByData
(
   CipShortString *p_cip_string,
   size_t str_len,
   const EipUint8 *p_data
)
{
    CipShortString   *p_result = p_cip_string;

    if (NULL != p_cip_string->string) {
        CipFree(p_cip_string->string);
        p_cip_string->string = NULL;
        p_cip_string->length = 0;
    }

    if (str_len) {
        /* Allocate & clear +1 bytes for the trailing '\0' character. */
        p_cip_string->string = CipCalloc(str_len+1, sizeof (EipUint8));
        if (NULL == p_cip_string->string) {
            p_result = NULL;
        }
        else {
            p_cip_string->length = str_len;
            memcpy(p_cip_string->string, p_data, str_len);
        }
    }
    return p_result;
}


CipShortString *SetCipShortStringByCstr
(
  CipShortString *p_cip_string,
  const char *p_string
)
{
    return SetCipShortStringByData(p_cip_string, strlen(p_string),
                              (const EipByte *)p_string);
}