_strdup, _wcsdup, _mbsdup

Duplicate strings.

char *_strdup( const char *strSource );

wchar_t *_wcsdup( const wchar_t *strSource );

unsigned char *_mbsdup( const unsigned char *strSource );

For additional compatibility information, see Compatibility in the Introduction.

Libraries

Return Value

Each of these functions returns a pointer to the storage location for the copied string or NULL if storage cannot be allocated.

Parameter

strSource

Null-terminated source string

Remarks

The _strdup function calls malloc to allocate storage space for a copy of strSource and then copies strSource to the allocated space.

_wcsdup and _mbsdup are wide-character and multibyte-character versions of _strdup. The arguments and return value of _wcsdup are wide-character strings; those of _mbsdup are multibyte-character strings. These three functions behave identically otherwise.

Generic-Text Routine Mappings

Because _strdup calls malloc to allocate storage space for the copy of strSource, it is good practice always to release this memory by calling the free routine on the pointer returned by the call to _strdup.

Example

/* STRDUP.C */

#include <string.h>
#include <stdio.h>

void main( void )
{
   char buffer[] = "This is the buffer text";
   char *newstring;
   printf( "Original: %s\n", buffer );
   newstring = _strdup( buffer );
   printf( "Copy:     %s\n", newstring );
   free( newstring );
}

Output

Original: This is the buffer text
Copy:     This is the buffer text

String Manipulation Routines

See Also   memset, strcat, strcmp, strncat, strncmp, strncpy, _strnicmp, strrchr, strspn