2 * Copyright (c) 1995, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.12 1995-11-08 17:41:33 quinn
10 * Revision 1.11 1995/11/01 13:54:43 quinn
13 * Revision 1.10 1995/10/25 16:58:19 quinn
14 * Stupid bug in odr_malloc
16 * Revision 1.9 1995/10/13 16:08:08 quinn
19 * Revision 1.8 1995/09/29 17:12:24 quinn
22 * Revision 1.7 1995/09/27 15:02:59 quinn
23 * Modified function heads & prototypes.
25 * Revision 1.6 1995/08/21 09:10:41 quinn
26 * Smallish fixes to suppport new formats.
28 * Revision 1.5 1995/05/16 08:50:55 quinn
29 * License, documentation, and memory fixes
31 * Revision 1.4 1995/05/15 11:56:09 quinn
32 * More work on memory management.
34 * Revision 1.3 1995/04/18 08:15:21 quinn
35 * Added dynamic memory allocation on encoding (whew). Code is now somewhat
36 * neater. We'll make the same change for decoding one day.
38 * Revision 1.2 1995/03/17 10:17:52 quinn
39 * Added memory management.
41 * Revision 1.1 1995/03/14 10:27:40 quinn
42 * Modified makefile to use common lib
43 * Beginning to add memory management to odr
51 /* ------------------------ NIBBLE MEMORY ---------------------- */
54 * Extract the memory control block from o.
56 NMEM odr_extract_mem(ODR o)
64 void *odr_malloc(ODR o, int size)
67 o->mem = nmem_create();
68 return nmem_malloc(o ? o->mem : 0, size);
73 return o->mem ? nmem_total(o->mem) : 0;
76 /* ---------- memory management for data encoding ----------*/
79 int odr_grow_block(odr_ecblock *b, int min_bytes)
89 if (togrow < min_bytes)
91 if (b->size && !(b->buf =xrealloc(b->buf, b->size += togrow)))
93 else if (!b->size && !(b->buf = xmalloc(b->size = togrow)))
96 fprintf(stderr, "New size for encode_buffer: %d\n", b->size);
101 int odr_write(ODR o, unsigned char *buf, int bytes)
103 if (o->ecb.pos + bytes >= o->ecb.size && odr_grow_block(&o->ecb, bytes))
108 memcpy(o->ecb.buf + o->ecb.pos, buf, bytes);
110 if (o->ecb.pos > o->ecb.top)
111 o->ecb.top = o->ecb.pos;
115 int odr_seek(ODR o, int whence, int offset)
117 if (whence == ODR_S_CUR)
118 offset += o->ecb.pos;
119 else if (whence == ODR_S_END)
120 offset += o->ecb.top;
121 if (offset > o->ecb.size && odr_grow_block(&o->ecb, offset - o->ecb.size))