1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 /* vim: set ts=8 sts=4 et sw=4 tw=80: */
3 /* This Source Code Form is subject to the terms of the Mozilla Public
4  * License, v. 2.0. If a copy of the MPL was not distributed with this
5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6 
7 /*
8  * Basic APIs for streaming typelib structures from disk.
9  */
10 
11 #ifndef __xpt_xdr_h__
12 #define __xpt_xdr_h__
13 
14 #include "xpt_struct.h"
15 #include "mozilla/NotNull.h"
16 
17 using mozilla::NotNull;
18 
19 struct XPTArena;
20 struct XPTCursor;
21 struct XPTState;
22 
23 bool XPT_SkipStringInline(NotNull<XPTCursor *> cursor);
24 
25 bool XPT_DoCString(XPTArena *arena, NotNull<XPTCursor *> cursor,
26                    const char **strp, bool ignore = false);
27 
28 bool XPT_DoIID(NotNull<XPTCursor *> cursor, nsID *iidp);
29 
30 bool XPT_Do64(NotNull<XPTCursor *> cursor, int64_t *u64p);
31 
32 bool XPT_Do32(NotNull<XPTCursor *> cursor, uint32_t *u32p);
33 
34 bool XPT_Do16(NotNull<XPTCursor *> cursor, uint16_t *u16p);
35 
36 bool XPT_Do8(NotNull<XPTCursor *> cursor, uint8_t *u8p);
37 
38 bool XPT_DoHeader(XPTArena *arena, NotNull<XPTCursor *> cursor,
39                   XPTHeader **headerp);
40 
41 enum XPTPool { XPT_HEADER = 0, XPT_DATA = 1 };
42 
43 struct XPTState {
44   uint32_t data_offset;
45   uint32_t next_cursor[2];
46   char *pool_data;
47   uint32_t pool_allocated;
48 };
49 
50 struct XPTCursor {
51   XPTState *state;
52   XPTPool pool;
53   uint32_t offset;
54   uint8_t bits;
55 };
56 
57 void XPT_InitXDRState(XPTState *state, char *data, uint32_t len);
58 
59 bool XPT_MakeCursor(XPTState *state, XPTPool pool, uint32_t len,
60                     NotNull<XPTCursor *> cursor);
61 
62 bool XPT_SeekTo(NotNull<XPTCursor *> cursor, uint32_t offset);
63 
64 void XPT_SetDataOffset(XPTState *state, uint32_t data_offset);
65 
66 #endif /* __xpt_xdr_h__ */
67