1 /* $NetBSD: citrus_memstream.h,v 1.3 2005/05/14 17:55:42 tshiozak Exp $ */
2 /* $DragonFly: src/lib/libc/citrus/citrus_memstream.h,v 1.3 2008/04/10 10:21:01 hasso Exp $ */
5 * Copyright (c)2003 Citrus Project,
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #ifndef _CITRUS_MEMSTREAM_H_
32 #define _CITRUS_MEMSTREAM_H_
34 struct _citrus_memory_stream {
35 struct _citrus_region ms_region;
40 const char * _citrus_memory_stream_getln(
41 struct _citrus_memory_stream * __restrict, size_t * __restrict);
42 const char * _citrus_memory_stream_matchline(
43 struct _citrus_memory_stream * __restrict, const char * __restrict,
44 size_t * __restrict, int);
45 void * _citrus_memory_stream_chr(struct _citrus_memory_stream *,
46 struct _citrus_region *, char);
47 void _citrus_memory_stream_skip_ws(struct _citrus_memory_stream *);
51 _citrus_memory_stream_iseof(struct _citrus_memory_stream *ms)
53 return ms->ms_pos >= _citrus_region_size(&ms->ms_region);
57 _citrus_memory_stream_bind(struct _citrus_memory_stream * __restrict ms,
58 const struct _citrus_region * __restrict r)
65 _citrus_memory_stream_bind_ptr(struct _citrus_memory_stream * __restrict ms,
68 struct _citrus_region r;
70 _citrus_region_init(&r, ptr, sz);
71 _citrus_memory_stream_bind(ms, &r);
75 _citrus_memory_stream_rewind(struct _citrus_memory_stream *ms)
80 static __inline size_t
81 _citrus_memory_stream_tell(struct _citrus_memory_stream *ms)
86 static __inline size_t
87 _citrus_memory_stream_remainder(struct _citrus_memory_stream *ms)
90 sz = _citrus_region_size(&ms->ms_region);
97 _citrus_memory_stream_seek(struct _citrus_memory_stream *ms, size_t pos, int w)
99 size_t sz = _citrus_region_size(&ms->ms_region);
107 pos += (ssize_t)ms->ms_pos;
115 ms->ms_pos = sz - pos;
122 _citrus_memory_stream_getc(struct _citrus_memory_stream *ms)
124 if (_citrus_memory_stream_iseof(ms))
126 return _citrus_region_peek8(&ms->ms_region, ms->ms_pos++);
130 _citrus_memory_stream_ungetc(struct _citrus_memory_stream *ms, int ch)
132 if (ch != EOF && ms->ms_pos > 0)
137 _citrus_memory_stream_peek(struct _citrus_memory_stream *ms)
139 if (_citrus_memory_stream_iseof(ms))
141 return _citrus_region_peek8(&ms->ms_region, ms->ms_pos);
144 static __inline void *
145 _citrus_memory_stream_getregion(struct _citrus_memory_stream *ms,
146 struct _citrus_region *r, size_t sz)
150 if (ms->ms_pos + sz > _citrus_region_size(&ms->ms_region))
153 ret = _citrus_region_offset(&ms->ms_region, ms->ms_pos);
156 _citrus_region_init(r, ret, sz);
162 _citrus_memory_stream_get8(struct _citrus_memory_stream *ms, uint8_t *rval)
165 if (ms->ms_pos + 1 > _citrus_region_size(&ms->ms_region))
168 *rval = _citrus_region_peek8(&ms->ms_region, ms->ms_pos);
175 _citrus_memory_stream_get16(struct _citrus_memory_stream *ms, uint16_t *rval)
178 if (ms->ms_pos + 2 > _citrus_region_size(&ms->ms_region))
181 *rval = _citrus_region_peek16(&ms->ms_region, ms->ms_pos);
188 _citrus_memory_stream_get32(struct _citrus_memory_stream *ms, uint32_t *rval)
191 if (ms->ms_pos + 4 > _citrus_region_size(&ms->ms_region))
194 *rval = _citrus_region_peek32(&ms->ms_region, ms->ms_pos);
201 _citrus_memory_stream_getln_region(struct _citrus_memory_stream *ms,
202 struct _citrus_region *r)
207 ptr = _citrus_memory_stream_getln(ms, &sz);
209 _citrus_region_init(r, __DECONST(char *, ptr), sz);