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/****************************************************************
*
* Purpose: Program to demonstrate the 'strncpy' function.
* Author: M J Leslie
* Date: 03-Feb-96
*
****************************************************************/
#include <string.h> /* strcpy */
void SafeCopy(char *Dest, int DestSize, char *Source);
main()
{
char Text1[20]="Tracy Sorrell"; /* string buffer */
char Text2[10]="Martin"; /* string buffer */
printf (" Original string contents are: %s\n", Text2);
SafeCopy(Text2, sizeof(Text2), Text1);
printf (" New string contents are: %s\n", Text2);
strcpy(Text2, "Alex");
printf (" Final string contents are: %s\n", Text2);
}
/****************************************************************/
void SafeCopy(
char *Dest, /* Destination buffer. */
int DestSize,
char *Source) /* Source data. */
{
/* ... Copy 'Source' into 'Dest'.
* ... 'Dest' is padded with NULLs if 'Source' is smaller.. */
strncpy(Dest, Source, DestSize);
/* ... Safety net! Add the NULL just in case 'Source' is larger
* ... than 'Dest'. */
Dest[DestSize-1] = '\0';
}
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