xref: /csrg-svn/usr.bin/f77/libU77/malloc_.c (revision 47944)
1*47944Sbostic /*-
2*47944Sbostic  * Copyright (c) 1980 The Regents of the University of California.
3*47944Sbostic  * All rights reserved.
418537Sralph  *
5*47944Sbostic  * %sccs.include.proprietary.c%
623039Skre  */
723039Skre 
8*47944Sbostic #ifndef lint
9*47944Sbostic static char sccsid[] = "@(#)malloc_.c	5.2 (Berkeley) 04/12/91";
10*47944Sbostic #endif /* not lint */
11*47944Sbostic 
1223039Skre /*
1318537Sralph  *	allows f77 programs to dynamicly allocate space
1418537Sralph  *	three routines:
1518537Sralph  *		call malloc(need, addr)
1618537Sralph  *		integer need, addr
1718537Sralph  *
1818537Sralph  *		call free(addr)
1918537Sralph  *		integer addr
2018537Sralph  *
2118537Sralph  *		call falloc( nelem, elsize, clean, basevec, addr, offset )
2218537Sralph  *		integer nelem, elsize, clean, addr, offset
2318537Sralph  *		dimension basevec(1)
2418537Sralph  *
2518537Sralph  *	malloc() & falloc() alloc space and put address in 'addr', 0 if can't
2618537Sralph  *	do it.  free() frees a block.  malloc() gets a block of at least
2718537Sralph  *	'need' bytes; falloc() gets at least nelem*elsize bytes, zeros
2818537Sralph  *	the block if clean=1, and returns an offset so that the block
2918537Sralph  *	can be referenced as basevec(offset+1)...basevec(offset+nelem)
3018537Sralph  *	in the calling program.  falloc() gets an extra element so that
3118537Sralph  *	all the elements will be in the block even if address arithmetic
3218537Sralph  *	involves truncation.
3318537Sralph  */
3418537Sralph 
3518537Sralph char *calloc(), *malloc();
3618537Sralph 
malloc_(need,addr)3718537Sralph malloc_( need, addr )
3818537Sralph int *need; char **addr;
3918537Sralph {
4018537Sralph 	*addr = malloc( *need );
4118537Sralph }
4218537Sralph 
free_(addr)4318537Sralph free_( addr )
4418537Sralph char **addr;
4518537Sralph {
4618537Sralph 	free( *addr );
4718537Sralph }
4818537Sralph 
falloc_(nelem,elsize,clean,basevec,addr,offset)4918537Sralph falloc_( nelem, elsize, clean, basevec, addr, offset )
5018537Sralph int *nelem, *elsize, *clean, *offset;
5118537Sralph char **addr, *basevec;
5218537Sralph {
5318537Sralph 	if( *clean == 1 )
5418537Sralph 		*addr = calloc( *nelem + 1, *elsize );
5518537Sralph 	else
5618537Sralph 		*addr = malloc( (*nelem + 1) * *elsize );
5718537Sralph 
5818537Sralph 	if( *addr != 0 )
5918537Sralph 		*offset = ((*addr - basevec) / *elsize) + 1;
6018537Sralph 	else
6118537Sralph 		*offset = 0;
6218537Sralph 
6318537Sralph }
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