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strdup.c

/*
 * Copyright (c) 2000-2001, 2003 Sendmail, Inc. and its suppliers.
 *    All rights reserved.
 *
 * By using this file, you agree to the terms and conditions set
 * forth in the LICENSE file which can be found at the top level of
 * the sendmail distribution.
 *
 */

#include <sm/gen.h>
SM_RCSID("@(#)$Id: strdup.c,v 1.15 2003/10/10 17:56:57 ca Exp $")

#include <sm/heap.h>
#include <sm/string.h>

/*
**  SM_STRNDUP_X -- Duplicate a string of a given length
**
**    Allocates memory and copies source string (of given length) into it.
**
**    Parameters:
**          s -- string to copy.
**          n -- length to copy.
**
**    Returns:
**          copy of string, raises exception if out of memory.
**
**    Side Effects:
**          allocate memory for new string.
*/

char *
sm_strndup_x(s, n)
      const char *s;
      size_t n;
{
      char *d = sm_malloc_x(n + 1);

      (void) memcpy(d, s, n);
      d[n] = '\0';
      return d;
}

/*
**  SM_STRDUP -- Duplicate a string
**
**    Allocates memory and copies source string into it.
**
**    Parameters:
**          s -- string to copy.
**
**    Returns:
**          copy of string, NULL if out of memory.
**
**    Side Effects:
**          allocate memory for new string.
*/

char *
sm_strdup(s)
      char *s;
{
      size_t l;
      char *d;

      l = strlen(s) + 1;
      d = sm_malloc_tagged(l, "sm_strdup", 0, sm_heap_group());
      if (d != NULL)
            (void) sm_strlcpy(d, s, l);
      return d;
}

#if DO_NOT_USE_STRCPY

/*
**  SM_STRDUP_X -- Duplicate a string
**
**    Allocates memory and copies source string into it.
**
**    Parameters:
**          s -- string to copy.
**
**    Returns:
**          copy of string, exception if out of memory.
**
**    Side Effects:
**          allocate memory for new string.
*/

char *
sm_strdup_x(s)
      const char *s;
{
      size_t l;
      char *d;

      l = strlen(s) + 1;
      d = sm_malloc_tagged_x(l, "sm_strdup_x", 0, sm_heap_group());
      (void) sm_strlcpy(d, s, l);
      return d;
}

/*
**  SM_PSTRDUP_X -- Duplicate a string (using "permanent" memory)
**
**    Allocates memory and copies source string into it.
**
**    Parameters:
**          s -- string to copy.
**
**    Returns:
**          copy of string, exception if out of memory.
**
**    Side Effects:
**          allocate memory for new string.
*/

char *
sm_pstrdup_x(s)
      const char *s;
{
      size_t l;
      char *d;

      l = strlen(s) + 1;
      d = sm_pmalloc_x(l);
      (void) sm_strlcpy(d, s, l);
      return d;
}

/*
**  SM_STRDUP_X -- Duplicate a string
**
**    Allocates memory and copies source string into it.
**
**    Parameters:
**          s -- string to copy.
**          file -- name of source file
**          line -- line in source file
**          group -- heap group
**
**    Returns:
**          copy of string, exception if out of memory.
**
**    Side Effects:
**          allocate memory for new string.
*/

char *
sm_strdup_tagged_x(s, file, line, group)
      const char *s;
      char *file;
      int line, group;
{
      size_t l;
      char *d;

      l = strlen(s) + 1;
      d = sm_malloc_tagged_x(l, file, line, group);
      (void) sm_strlcpy(d, s, l);
      return d;
}

#endif /* DO_NOT_USE_STRCPY */


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