blob: 966230152f2aad0788a4f8f962864ee1de67139b (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include "mwcs.h"
# MW_ALLOCD -- Allocate space in the data buffer. The size of the buffer
# is automatically increased if necessary. Note that reallocation of the
# buffer may cause it to move, hence all data items are referred to by their
# offset in the buffer, rather than by an absolute pointer.
int procedure mw_allocd (mw, nelem)
pointer mw #I pointer to MWCS descriptor
int nelem #I number of elements to alloc space for
int dbufused, dbuflen, offset
errchk realloc
begin
dbufused = MI_DBUFUSED(mw)
dbuflen = MI_DBUFLEN(mw)
offset = dbufused + 1
# Increase buffer size?
if (dbufused + nelem > dbuflen) {
dbuflen = dbuflen + INC_SZDBUF
while (dbufused + nelem > dbuflen)
dbuflen = dbuflen + INC_SZDBUF
call realloc (MI_DBUF(mw), dbuflen, TY_DOUBLE)
call aclrd (D(mw,offset), dbuflen - offset + 1)
MI_DBUFLEN(mw) = dbuflen
}
# Allocate the space in the buffer, and return the buffer offset
# of the allocated area.
MI_DBUFUSED(mw) = max (0, dbufused + nelem)
return (offset)
end
|
