www.pudn.com > CRCSET13 > BUFALLOC.C

/* 
BUFALLOC.C 
 
Kevin Dean 
Fairview Mall P.O. Box 55074 
1800 Sheppard Avenue East 
Willowdale, Ontario 
CANADA    M2J 5B9 
CompuServe ID: 76336,3114 
 
March 24, 1991 
 
	This module allocates a simple memory buffer whose size depends on the 
amount of memory available.  The size of the buffer is halved each time the 
allocation fails until memory is successfully allocated or the size goes below 
the minimum size requested. 
 
	This code is public domain. 
*/ 
 
 
#include  
 
 
/***/ 
/* Allocate a buffer of flexible size. */ 
void *bufalloc(size_t *size, size_t minsize) 
{ 
void *buffer;	/* Buffer allocated. */ 
size_t bufsize;	/* Size of buffer allocated. */ 
 
/* Allocate as big a buffer as possible (at least minsize). */ 
for (bufsize = *size; bufsize >= minsize && !(buffer = malloc(bufsize)); bufsize /= 2); 
 
/* Save buffer size. */ 
*size = bufsize; 
 
return (buffer); 
}