Mercurial > cgi-bin > hgwebdir.cgi > VMS > C_Libraries > DynArray
view DynArray.c @ 3:8473c52c6f0e
Changed name from Vector to DynArray
| author | Me |
|---|---|
| date | Sun, 12 Sep 2010 12:10:25 -0700 |
| parents | |
| children | f35e64d7a42b |
line source
1 /*
2 * Copyright 2010 OpenSourceCodeStewardshipFoundation
3 *
4 * Licensed under BSD
5 */
9 #include <stdio.h>
10 #include <malloc.h>
14 /*make a struct with the sizes and a pointer to the
15 * array, but hide a reverse pointer at the front of the array that
16 * points back to the vector struct -- that way, can pass around the
17 * array when doing work on elements, but when need to increase size,
18 * get pointer to vector struct and use that, which will change the
19 * ptr to the array in the vector struc, and return the new pointer..
20 * so from the point of changing size on, have the correct array ptr,
21 * and also all other places that initiate a sequence later will get
22 * the array ptr from the vector struct at the sequence start..
23 */
24 bool8
25 addToVect( Vector *vect, void *ptrToElem )
26 { int32 numPtrsInVect, sizeOfVect;
28 /*
29 numPtrsInVect = *(vect -1); //num ptrs is "hidden" in front
30 sizeOfVect = *(vect -2);
31 */
32 numPtrsInVect = vect->numPtrsInArray;
33 sizeOfVect = vect->sizeOfArray;
35 if( numPtrsInVect >= sizeOfVect ) return FALSE;
37 vect->arrayOfPtrs[numPtrsInVect] = ptrToElem;
38 vect->numPtrsInArray++;
39 }
41 void **
42 increaseSizeOfVect( Vector *vect )
43 { int32 oldSizeOfArray, newSizeOfArray, i;
44 void **newArray, **oldArray;
46 oldSizeOfArray = vect->sizeOfArray;
47 newSizeOfArray = oldSizeOfArray * 2;
48 oldArray = vect->arrayOfPtrs;
49 newArray = malloc( (newSizeOfArray + 1) * sizeof(void *) );
50 *newArray = vect;
51 newArray++;
52 for( i = 0; i < oldSizeOfArray; i++ )
53 {
54 newArray[i] = oldArray[i];
55 }
56 vect->arrayOfPtrs = newArray;
57 vect->sizeOfArray = newSizeOfArray;
59 free( oldArray -1 );
60 return newArray;
61 }
63 /*
64 bool8
65 forAllInVectDo( ptrToFnTakesVectElemAsVoid* )
66 {
67 return success;
68 }
69 */