sendmail/libsm/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.
 *
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#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 */