2 /* $NetBSD: citrus_memstream.h,v 1.3 2005/05/14 17:55:42 tshiozak Exp $ */
5 * SPDX-License-Identifier: BSD-2-Clause
7 * Copyright (c)2003 Citrus Project,
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 #ifndef _CITRUS_MEMSTREAM_H_
34 #define _CITRUS_MEMSTREAM_H_
36 struct _citrus_memory_stream {
37 struct _citrus_region ms_region;
42 const char *_citrus_memory_stream_getln(
43 struct _citrus_memory_stream * __restrict,
45 const char *_citrus_memory_stream_matchline(
46 struct _citrus_memory_stream * __restrict,
47 const char * __restrict, size_t * __restrict, int);
48 void *_citrus_memory_stream_chr(struct _citrus_memory_stream *,
49 struct _citrus_region *, char);
50 void _citrus_memory_stream_skip_ws(struct _citrus_memory_stream *);
54 _citrus_memory_stream_iseof(struct _citrus_memory_stream *ms)
57 return (ms->ms_pos >= _citrus_region_size(&ms->ms_region));
61 _citrus_memory_stream_bind(struct _citrus_memory_stream * __restrict ms,
62 const struct _citrus_region * __restrict r)
70 _citrus_memory_stream_bind_ptr(struct _citrus_memory_stream * __restrict ms,
73 struct _citrus_region r;
75 _citrus_region_init(&r, ptr, sz);
76 _citrus_memory_stream_bind(ms, &r);
80 _citrus_memory_stream_rewind(struct _citrus_memory_stream *ms)
86 static __inline size_t
87 _citrus_memory_stream_tell(struct _citrus_memory_stream *ms)
93 static __inline size_t
94 _citrus_memory_stream_remainder(struct _citrus_memory_stream *ms)
98 sz = _citrus_region_size(&ms->ms_region);
101 return (sz-ms->ms_pos);
105 _citrus_memory_stream_seek(struct _citrus_memory_stream *ms, size_t pos, int w)
109 sz = _citrus_region_size(&ms->ms_region);
118 pos += (ssize_t)ms->ms_pos;
126 ms->ms_pos = sz - pos;
133 _citrus_memory_stream_getc(struct _citrus_memory_stream *ms)
136 if (_citrus_memory_stream_iseof(ms))
138 return (_citrus_region_peek8(&ms->ms_region, ms->ms_pos++));
142 _citrus_memory_stream_ungetc(struct _citrus_memory_stream *ms, int ch)
145 if (ch != EOF && ms->ms_pos > 0)
150 _citrus_memory_stream_peek(struct _citrus_memory_stream *ms)
153 if (_citrus_memory_stream_iseof(ms))
155 return (_citrus_region_peek8(&ms->ms_region, ms->ms_pos));
158 static __inline void *
159 _citrus_memory_stream_getregion(struct _citrus_memory_stream *ms,
160 struct _citrus_region *r, size_t sz)
164 if (ms->ms_pos + sz > _citrus_region_size(&ms->ms_region))
167 ret = _citrus_region_offset(&ms->ms_region, ms->ms_pos);
170 _citrus_region_init(r, ret, sz);
176 _citrus_memory_stream_get8(struct _citrus_memory_stream *ms, uint8_t *rval)
179 if (ms->ms_pos + 1 > _citrus_region_size(&ms->ms_region))
182 *rval = _citrus_region_peek8(&ms->ms_region, ms->ms_pos);
189 _citrus_memory_stream_get16(struct _citrus_memory_stream *ms, uint16_t *rval)
192 if (ms->ms_pos + 2 > _citrus_region_size(&ms->ms_region))
195 *rval = _citrus_region_peek16(&ms->ms_region, ms->ms_pos);
202 _citrus_memory_stream_get32(struct _citrus_memory_stream *ms, uint32_t *rval)
205 if (ms->ms_pos + 4 > _citrus_region_size(&ms->ms_region))
208 *rval = _citrus_region_peek32(&ms->ms_region, ms->ms_pos);
215 _citrus_memory_stream_getln_region(struct _citrus_memory_stream *ms,
216 struct _citrus_region *r)
221 ptr = _citrus_memory_stream_getln(ms, &sz);
223 _citrus_region_init(r, __DECONST(void *, ptr), sz);
225 return (ptr == NULL);