1 /* $NetBSD: citrus_memstream.h,v 1.3 2005/05/14 17:55:42 tshiozak Exp $ */
4 * SPDX-License-Identifier: BSD-2-Clause
6 * Copyright (c)2003 Citrus Project,
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #ifndef _CITRUS_MEMSTREAM_H_
33 #define _CITRUS_MEMSTREAM_H_
35 struct _citrus_memory_stream {
36 struct _citrus_region ms_region;
41 const char *_citrus_memory_stream_getln(
42 struct _citrus_memory_stream * __restrict,
44 const char *_citrus_memory_stream_matchline(
45 struct _citrus_memory_stream * __restrict,
46 const char * __restrict, size_t * __restrict, int);
47 void *_citrus_memory_stream_chr(struct _citrus_memory_stream *,
48 struct _citrus_region *, char);
49 void _citrus_memory_stream_skip_ws(struct _citrus_memory_stream *);
53 _citrus_memory_stream_iseof(struct _citrus_memory_stream *ms)
56 return (ms->ms_pos >= _citrus_region_size(&ms->ms_region));
60 _citrus_memory_stream_bind(struct _citrus_memory_stream * __restrict ms,
61 const struct _citrus_region * __restrict r)
69 _citrus_memory_stream_bind_ptr(struct _citrus_memory_stream * __restrict ms,
72 struct _citrus_region r;
74 _citrus_region_init(&r, ptr, sz);
75 _citrus_memory_stream_bind(ms, &r);
79 _citrus_memory_stream_rewind(struct _citrus_memory_stream *ms)
85 static __inline size_t
86 _citrus_memory_stream_tell(struct _citrus_memory_stream *ms)
92 static __inline size_t
93 _citrus_memory_stream_remainder(struct _citrus_memory_stream *ms)
97 sz = _citrus_region_size(&ms->ms_region);
100 return (sz-ms->ms_pos);
104 _citrus_memory_stream_seek(struct _citrus_memory_stream *ms, size_t pos, int w)
108 sz = _citrus_region_size(&ms->ms_region);
117 pos += (ssize_t)ms->ms_pos;
125 ms->ms_pos = sz - pos;
132 _citrus_memory_stream_getc(struct _citrus_memory_stream *ms)
135 if (_citrus_memory_stream_iseof(ms))
137 return (_citrus_region_peek8(&ms->ms_region, ms->ms_pos++));
141 _citrus_memory_stream_ungetc(struct _citrus_memory_stream *ms, int ch)
144 if (ch != EOF && ms->ms_pos > 0)
149 _citrus_memory_stream_peek(struct _citrus_memory_stream *ms)
152 if (_citrus_memory_stream_iseof(ms))
154 return (_citrus_region_peek8(&ms->ms_region, ms->ms_pos));
157 static __inline void *
158 _citrus_memory_stream_getregion(struct _citrus_memory_stream *ms,
159 struct _citrus_region *r, size_t sz)
163 if (ms->ms_pos + sz > _citrus_region_size(&ms->ms_region))
166 ret = _citrus_region_offset(&ms->ms_region, ms->ms_pos);
169 _citrus_region_init(r, ret, sz);
175 _citrus_memory_stream_get8(struct _citrus_memory_stream *ms, uint8_t *rval)
178 if (ms->ms_pos + 1 > _citrus_region_size(&ms->ms_region))
181 *rval = _citrus_region_peek8(&ms->ms_region, ms->ms_pos);
188 _citrus_memory_stream_get16(struct _citrus_memory_stream *ms, uint16_t *rval)
191 if (ms->ms_pos + 2 > _citrus_region_size(&ms->ms_region))
194 *rval = _citrus_region_peek16(&ms->ms_region, ms->ms_pos);
201 _citrus_memory_stream_get32(struct _citrus_memory_stream *ms, uint32_t *rval)
204 if (ms->ms_pos + 4 > _citrus_region_size(&ms->ms_region))
207 *rval = _citrus_region_peek32(&ms->ms_region, ms->ms_pos);
214 _citrus_memory_stream_getln_region(struct _citrus_memory_stream *ms,
215 struct _citrus_region *r)
220 ptr = _citrus_memory_stream_getln(ms, &sz);
222 _citrus_region_init(r, __DECONST(void *, ptr), sz);
224 return (ptr == NULL);