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The CICA Windows Explosion!
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LIB.C
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1995-02-23
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// File from page 92 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).
//////////////////////////////////////////////////
/*: LIB.C -- Implementation of
example C library */
/* Declare structure and functions: */
#include "..\1\lib.h"
/* Error testing macros: */
#include <assert.h>
/* Dynamic memory allocation functions: */
#include <stdlib.h>
#include <string.h> /* memcpy() */
#include <stdio.h>
void initialize(Stash* S, int Size) {
S->size = Size;
S->quantity = 0;
S->storage = 0;
S->next = 0;
}
void cleanup(Stash* S) {
if(S->storage) {
puts("freeing storage");
free(S->storage);
}
}
int add(Stash* S, void* element) {
/* enough space left? */
if(S->next >= S->quantity)
inflate(S, 100);
/* Copy element into storage,
starting at next empty space: */
memcpy(&(S->storage[S->next * S->size]),
element, S->size);
S->next++;
return(S->next - 1); /* Index number */
}
void* fetch(Stash* S, int index) {
if(index >= S->next || index < 0)
return 0; /* Not out of bounds? */
/* Produce pointer to desired element: */
return &(S->storage[index * S->size]);
}
int count(Stash* S) {
/* Number of elements in stash */
return S->next;
}
void inflate(Stash* S, int increase) {
void* v =
realloc(S->storage,
(S->quantity + increase)
* S->size);
/* Was it successful? */
assert(v);
S->storage = v;
S->quantity += increase;
}