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FishMarket 1.0
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disk_214
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mandelvroom
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src
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safeaddhead.c
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C/C++ Source or Header
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1992-05-06
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83 lines
/*
* MandelVroom 2.0
*
* (c) Copyright 1987,1989 Kevin L. Clague, San Jose, CA
*
* All rights reserved.
*
* Permission is hereby granted to distribute this program's source
* executable, and documentation for non-comercial purposes, so long as the
* copyright notices are not removed from the sources, executable or
* documentation. This program may not be distributed for a profit without
* the express written consent of the author Kevin L. Clague.
*
* This program is not in the public domain.
*
* Fred Fish is expressly granted permission to distribute this program's
* source and executable as part of the "Fred Fish freely redistributable
* Amiga software library."
*
* Permission is expressly granted for this program and it's source to be
* distributed as part of the Amicus Amiga software disks, and the
* First Amiga User Group's Hot Mix disks.
*
* contents: this file contains some routines to check for adding nodes to
* lists twice, or removing nodes that are not in a list.
*/
#include <exec/lists.h>
#include <exec/nodes.h>
#undef AddHead
#undef Remove
extern BYTE FromWB;
safeAddHead( ListPtr, NodePtr, File, Line, Function )
register struct List *ListPtr;
register struct Node *NodePtr;
char *File, *Function;
int Line;
{
register struct Node *CurNode;
CurNode = ListPtr->lh_Head;
while ( CurNode->ln_Succ ) {
if ( CurNode == NodePtr ) {
if (! FromWB)
printf("Error adding node to list twice\n in file %s, line %d, function %s\n",
File, Line, Function);
return;
}
CurNode = CurNode->ln_Succ;
}
AddHead( ListPtr, NodePtr );
}
safeRemove( NodePtr, File, Line, Function )
register struct Node *NodePtr;
char *File, *Function;
int Line;
{
if (NodePtr->ln_Pred == NULL && !FromWB) {
printf("Error Removing node when it'd not it list\n");
printf("In File %s Line %d Function %s\n",File,Line,Function);
} else {
if (NodePtr->ln_Succ == NULL && !FromWB) {
printf("Error Removing node when it'd not it list\n");
printf("In File %s Line %d Function %s\n",File,Line,Function);
}
}
Remove( NodePtr );
NodePtr->ln_Pred = NULL;
NodePtr->ln_Succ = NULL;
}