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haas:summer2015:data:projects:dln0 [2015/06/21 14:08] – l wedgehaas:summer2015:data:projects:dln0 [2015/06/21 20:51] (current) – [node operation status codes] wedge
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 #define  DLN_ERROR           16   // 0x10, 0020, 00010000 #define  DLN_ERROR           16   // 0x10, 0020, 00010000
 #define  DLN_DEFAULT_FAIL    32   // 0x20, 0040, 00100000 #define  DLN_DEFAULT_FAIL    32   // 0x20, 0040, 00100000
-#define  DLN_RESERVED_CODE1  64   // 0x40, 0100, 01000000 +#define  DLN_INVALID         64   // 0x40, 0100, 01000000 
-#define  DLN_RESERVED_CODE2  128  // 0x80, 0200, 10000000+#define  DLN_RESERVED_CODE   128  // 0x80, 0200, 10000000
  
 // Function prototypes // Function prototypes
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 #endif #endif
 </code> </code>
-====In inc/list.h==== 
  
-<code c 1> +====node operation status codes==== 
-#ifndef _LIST_H +You'll notice the presence of a set of #define's in the data.h header file. These are intended to be used to report on various states of node status after performing various operations.
-#define _LIST_H +
- +
-#include "node.h"                       // list relies on node to work +
- +
-#define  DLL_SUCCESS            0 +
-#define  DLL_MALLOC_FAIL        1 +
-#define  DLL_ALREADY_ALLOC      2 +
-#define  DLL_NULL               4 +
-#define  DLL_EMPTY              8 +
-#define  DLL_DEFAULT_FAIL       64 +
-#define  DLL_FAIL               128 +
- +
-struct list { +
-    Node              *first;           // pointer to start of list +
-    Node              *last;            // pointer to end of list +
-}; +
-typedef struct list    List;            // because we deserve nice things +
- +
-int mklist (List **);                   // create/allocate new list struct +
-int cplist (List *,  List **);          // duplicate list contents  +
- +
-int insert (List **, Node *, Node *);   // add node before given node +
-int append (List **, Node *, Node *);   // add node after given node +
- +
-int display(List *,  int);              // display list from start to end +
-int find   (List *,  int,    Node **);  // locate node containing value +
- +
-#endif +
-</code> +
- +
-The following changes have taken place: +
- +
-  * **qty** has been removed from the list +
-  * **getpos()**/**setpos()** are no longer present. In many ways their functionality is no longer needed with the doubly-linked nature of the list. +
-  * **searchlist()** has been renamed to **find()** (aesthetic change, to keep function names at 8 characters or less, and now supports resuming (finding additional matches). +
-  * **displayf()/displayb()** are gone, and previous functionality will be merged into one universal **display()** function.  +
- +
-There is now a set of status/error codes that will be utilized as list function return values, so we can better report particular failures. +
- +
-====list operation status codes==== +
-You'll notice the presence of a set of #define's in the list header file. These are intended to be used to report on various states of list status after performing various operations.+
  
 They are not exclusive- in some cases, multiple states can be applied. The intent is that you will OR together all pertinent states and return that from the function. They are not exclusive- in some cases, multiple states can be applied. The intent is that you will OR together all pertinent states and return that from the function.
  
-  * **DLL_SUCCESS** - everything went according to plan, no errors encountered, average case +  * **DLN_SUCCESS** - everything went according to plan, no errors encountered, average case 
-  * **DLL_MALLOC_FAIL** - memory allocation failed (considered in error) +  * **DLN_MALLOC_FAIL** - memory allocation failed (considered in error) 
-  * **DLL_ALREADY_ALLOC** - memory has already been allocated (considered in error) +  * **DLN_ALREADY_ALLOC** - memory has already been allocated (considered in error) 
-  * **DLL_NULL** - result is NULL (probably in error) +  * **DLN_NULL** - result is NULL (probably in error) 
-  * **DLL_EMPTY** - result is an empty list (may or may not be in error) +  * **DLN_DEFAULT_FAIL** - default state of unimplemented functions (default error) 
-  * **DLL_DEFAULT_FAIL** - default state of unimplemented functions (default error) +  * **DLN_ERROR** - some error occurred 
-  * **DLL_FAIL** - some error occurred+  * **DLN_INVALID** - invalid use (NULL pointer) 
 +  * **DLN_RESERVED_CODE** - reserved for future use (not used at present time)
  
-For example, in the case of "DLL_MALLOC_FAIL", there are actually a total of three states raised: +For example, in the case of "DLN_MALLOC_FAIL", there are actually a total of three states raised: 
-  * DLL_FAIL (a problem has occurred) +  * DLN_ERROR (a problem has occurred) 
-  * DLL_MALLOC_FAIL (a problem has occurred when using malloc()) +  * DLN_MALLOC_FAIL (a problem has occurred when using malloc()) 
-  * DLL_NULL (no memory allocated, so list cannot be anything but NULL)+  * DLN_NULL (no memory allocated, so node cannot be anything but NULL)
  
 ALL THREE states must be returned from the function in question should such an occurrence take place. ALL THREE states must be returned from the function in question should such an occurrence take place.
 +
 +You'll notice these #defines map to numeric values, and particular ones at that. This is to our supreme advantage: if you understand how numbers work, you should have an easy time of working with these status codes.
 ====node library==== ====node library====
 In **src/node/**, you will find skeletons of what was previously there, ready for you to re-implement. In **src/node/**, you will find skeletons of what was previously there, ready for you to re-implement.
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 =    Verifying Doubly-Linked Node Functionality    = =    Verifying Doubly-Linked Node Functionality    =
 ==================================================== ====================================================
-  [mknode] Total:   5, Matches:   5, Mismatches:   0 + [mknode] Total:  12, Matches:  12, Mismatches:   0 
-  [cpnode] Total:   6, Matches:   6, Mismatches:   0 + [cpnode] Total:  15, Matches:  15, Mismatches:   0 
-  [rmnode] Total:   2, Matches:   2, Mismatches:   0+ [rmnode] Total:   4, Matches:   4, Mismatches:   0
 ==================================================== ====================================================
- [RESULTS] Total:  13, Matches:  13, Mismatches:   0+[RESULTS] Total:  31, Matches:  31, Mismatches:   0
 ==================================================== ====================================================
 lab46:~/src/data/dln0$  lab46:~/src/data/dln0$ 
haas/summer2015/data/projects/dln0.1434895695.txt.gz · Last modified: 2015/06/21 14:08 by wedge

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