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102 lines
2.6 KiB
C++
102 lines
2.6 KiB
C++
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#include <stdlib.h>
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#include <string.h>
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#include "trick/collect_macros.h"
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/**
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@brief
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Adds the addess, collectee, to the list pointed to by collector. Returns a new pointer
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to the new list. The old list a collector will be freed.
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@details
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-# Get the current list length
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-# Allocate enough space to accomodate the current list + 1. (+1 for the size of the list)
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-# Set the size of the new list in the first slot of the new list.
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-# Copy the old list to the new.
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-# Append the new item to the new list.
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-# Delete the old list
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-# Return the new list
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*/
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void ** add_collect( void ** collector , void * collectee ) {
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int collect_size = NUM_COLLECT(collector) ;
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void ** new_list ;
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long * lp ;
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// create a new list
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new_list = (void**)malloc((collect_size + 2) * sizeof(void*));
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// set the list size
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lp = ( long *)new_list ;
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*lp = collect_size + 1 ;
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// copy old list
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new_list++ ;
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if ( collect_size > 0 ) {
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memcpy( new_list , collector , collect_size * sizeof(void *)) ;
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}
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new_list[collect_size] = collectee ;
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// remove old list
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if ( collector ) {
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free(collector - 1) ;
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}
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return new_list ;
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}
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/**
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@brief
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Deletes the addess, collectee, from the list pointed to by collector. Returns a new pointer
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to the new list. The old list a collector will be freed.
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@details
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-# Get the current list length
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-# Count the number of items in the list that do not match the collectee.
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-# Allocate enough space to accomodate the new list. (+1 for the size of the list)
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-# Set the size of the new list in the first slot of the new list.
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-# Copy all of the items that do not match collectee to the new list
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-# Delete the old list
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-# Return the new list
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*/
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void ** delete_collect( void ** collector , void * collectee ) {
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int collect_size = NUM_COLLECT(collector) ;
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int new_count = 0 ;
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void ** new_list ;
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long * lp ;
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int ii , jj ;
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for ( ii = 0 ; ii < collect_size ; ii++ ) {
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if ( collector[ii] != collectee ) {
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new_count++ ;
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}
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}
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if ( new_count > 0 ) {
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// create a new list
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new_list = (void**)malloc((new_count + 1) * sizeof(void*));
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// set the list size
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lp = ( long *)new_list ;
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*lp = new_count ;
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// copy old list
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new_list++ ;
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jj = 0 ;
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for ( ii = 0 ; ii < collect_size ; ii++ ) {
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if ( collector[ii] != collectee ) {
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new_list[jj++] = collector[ii] ;
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}
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}
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} else {
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new_list = NULL ;
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}
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// remove old list
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if ( collector ) {
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free(collector - 1) ;
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}
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return new_list ;
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}
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