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- // File referred to (not printed) on page 140 in "Thinking in C++" by Bruce Eckel
- //////////////////////////////////////////////////
- // From the compressed package ECKELT01.ZIP 2/21/95
- // Copyright (c) Bruce Eckel, 1995
- // Source code file from the book "Thinking in C++",
- // Prentice Hall, 1995, ISBN: 0-13-917709-4
- // All rights reserved EXCEPT as allowed by the following
- // statements: You may freely use this file for your own
- // work, including modifications and distribution in
- // executable form only. You may copy and distribute this
- // file, as long as it is only distributed in the complete
- // (compressed) package with the other files from this
- // book and you do not remove this copyright and notice.
- // You may not distribute modified versions of the source
- // code in this package. This package may be freely placed
- // on bulletin boards, internet nodes, shareware disks and
- // product vendor disks. You may not use this file in
- // printed media without the express permission of the
- // author. Bruce Eckel makes no
- // representation about the suitability of this software
- // for any purpose. It is provided "as is" without express
- // or implied warranty of any kind. The entire risk as to
- // the quality and performance of the software is with
- // you. Should the software prove defective, you assume
- // the cost of all necessary servicing, repair, or
- // correction.
- // If you think you've found an error, please
- // email all modified files with loudly commented changes
- // to: eckel@aol.com (please use the same
- // address for non-code errors found in the book).
- //////////////////////////////////////////////////
-
- //: STASH.CPP -- Class with access control
- #include "..\2\stash.h"
- #include <assert.h>
- #include <stdlib.h>
- #include <string.h>
- #include <stdio.h>
-
- void stash::initialize(int Size) {
- size = Size;
- quantity = 0;
- storage = 0;
- next = 0;
- }
-
- void stash::cleanup() {
- if(storage) {
- puts("freeing storage");
- free(storage);
- }
- }
-
- int stash::add(void* element) {
- if(next >= quantity) // Enough space left?
- inflate(100);
- // Copy element into storage,
- // starting at next empty space:
- memcpy(&(storage[next * size]),
- element, size);
- next++;
- return(next - 1); // Index number
- }
-
- void* stash::fetch(int index) {
- if(index >= next || index < 0)
- return 0; // Not out of bounds?
- // Produce pointer to desired element:
- return &(storage[index * size]);
- }
-
- int stash::count() {
- return next; // Number of elements in stash
- }
-
- void stash::inflate(int increase) {
- void* v =
- realloc(storage, (quantity+increase)*size);
- assert(v); // Was it successful?
- storage = (unsigned char*)v;
- quantity += increase;
- }
-