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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "npstringarray.h"
int NP_Stringarray::replace_item( int i, const char *replacement )
{
if ( mutex )
return 3;
mutex = 1;
if ( i < 0 || i >= total )
{
snprintf( error_message, sizeof error_message,
"NP_Stringarray: replace_item(): index out of range: %d.", i );
mutex = 0;
return 2;
}
if ( replacement == NULL )
{
strcpy( error_message, "NP_Stringarray: replace_item(): NULL "
"replacement item passed as argument." );
mutex = 0;
return 1;
}
if ( item_list[ i ] != NULL )
{
if ( !duplicates_allowed )
{
int j;
char **pointer = item_list;
for( j = 0; j < total; ++j )
{
if ( i == j )
{
++pointer;
continue;
}
if ( !strcmp( *pointer++, replacement ))
break;
}
if ( j != total )
{
snprintf( error_message, sizeof error_message,
"NP_Stringarray: replace_item(): replacing %s with %s"
" would create a duplicate entry.", item_list[ i ],
replacement );
mutex = 0;
return 2;
}
}
free( item_list[ i ] );
if (( item_list[ i ] = strdup( replacement )) == NULL )
{
perror( "strdup" );
exit( 1 );
}
}
else
{
snprintf( error_message, sizeof error_message,
"NP_Stringarray: replace_item(): item %d is NULL. "
"This should never happen!", i );
mutex = 0;
return 1;
}
mutex = 0;
return 0;
}
int NP_Stringarray::replace_item( const char *old, const char *replacement )
{
if ( mutex )
return 3;
mutex = 1;
if ( old == NULL )
{
strcpy( error_message, "NP_Stringarray: replace_item(): NULL old item"
" name passed as argument." );
mutex = 0;
return 1;
}
if ( replacement == NULL )
{
strcpy( error_message, "NP_Stringarray: replace_item() NULL "
"replacement item passed as argument." );
mutex = 0;
return 1;
}
char **pointer = item_list;
int i;
for( i = 0; i < total; ++i )
{
if ( *pointer == NULL )
{
strcpy( error_message, "NP_Stringarray: replace_item(): "
"there is a NULL item in this object."
"This should never happen!" );
mutex = 0;
return 1;
}
if ( !strcmp( old, *pointer ))
break;
++pointer;
}
if ( i == total )
{
snprintf( error_message, sizeof error_message,
"NP_Stringarray: replace_item(): "
"no such item has been added to this object: %s.",
replacement );
mutex = 0;
return 1;
}
if ( !duplicates_allowed )
{
int j;
char **pointer = item_list;
for( j = 0; j < total; ++j )
{
if ( i == j )
{
++pointer;
continue;
}
if ( !strcmp( *pointer++, replacement ))
break;
}
if ( j != total )
{
snprintf( error_message, sizeof error_message,
"NP_Stringarray: replace_item(): replacing %s with %s"
" would create a duplicate entry.", item_list[ i ],
replacement );
mutex = 0;
return 2;
}
}
free( *pointer );
if (( *pointer = strdup( replacement )) == NULL )
{
perror( "strdup" );
exit( 1 );
}
mutex = 0;
return 0;
}
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