1 /* $FreeBSD: head/lib/libc/iconv/citrus_memstream.h 219019 2011-02-25 00:04:39Z gabor $ */
2 /* $NetBSD: citrus_memstream.h,v 1.3 2005/05/14 17:55:42 tshiozak 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,
43 const char *_citrus_memory_stream_matchline(
44 struct _citrus_memory_stream * __restrict,
45 const char * __restrict, size_t * __restrict, int);
46 void *_citrus_memory_stream_chr(struct _citrus_memory_stream *,
47 struct _citrus_region *, char);
48 void _citrus_memory_stream_skip_ws(struct _citrus_memory_stream *);
52 _citrus_memory_stream_iseof(struct _citrus_memory_stream *ms)
55 return (ms->ms_pos >= _citrus_region_size(&ms->ms_region));
59 _citrus_memory_stream_bind(struct _citrus_memory_stream * __restrict ms,
60 const struct _citrus_region * __restrict r)
68 _citrus_memory_stream_bind_ptr(struct _citrus_memory_stream * __restrict ms,
71 struct _citrus_region r;
73 _citrus_region_init(&r, ptr, sz);
74 _citrus_memory_stream_bind(ms, &r);
78 _citrus_memory_stream_rewind(struct _citrus_memory_stream *ms)
84 static __inline size_t
85 _citrus_memory_stream_tell(struct _citrus_memory_stream *ms)
91 static __inline size_t
92 _citrus_memory_stream_remainder(struct _citrus_memory_stream *ms)
96 sz = _citrus_region_size(&ms->ms_region);
99 return (sz-ms->ms_pos);
103 _citrus_memory_stream_seek(struct _citrus_memory_stream *ms, size_t pos, int w)
107 sz = _citrus_region_size(&ms->ms_region);
116 pos += (ssize_t)ms->ms_pos;
124 ms->ms_pos = sz - pos;
131 _citrus_memory_stream_getc(struct _citrus_memory_stream *ms)
134 if (_citrus_memory_stream_iseof(ms))
136 return (_citrus_region_peek8(&ms->ms_region, ms->ms_pos++));
140 _citrus_memory_stream_ungetc(struct _citrus_memory_stream *ms, int ch)
143 if (ch != EOF && ms->ms_pos > 0)
148 _citrus_memory_stream_peek(struct _citrus_memory_stream *ms)
151 if (_citrus_memory_stream_iseof(ms))
153 return (_citrus_region_peek8(&ms->ms_region, ms->ms_pos));
156 static __inline void *
157 _citrus_memory_stream_getregion(struct _citrus_memory_stream *ms,
158 struct _citrus_region *r, size_t sz)
162 if (ms->ms_pos + sz > _citrus_region_size(&ms->ms_region))
165 ret = _citrus_region_offset(&ms->ms_region, ms->ms_pos);
168 _citrus_region_init(r, ret, sz);
174 _citrus_memory_stream_get8(struct _citrus_memory_stream *ms, uint8_t *rval)
177 if (ms->ms_pos + 1 > _citrus_region_size(&ms->ms_region))
180 *rval = _citrus_region_peek8(&ms->ms_region, ms->ms_pos);
187 _citrus_memory_stream_get16(struct _citrus_memory_stream *ms, uint16_t *rval)
190 if (ms->ms_pos + 2 > _citrus_region_size(&ms->ms_region))
193 *rval = _citrus_region_peek16(&ms->ms_region, ms->ms_pos);
200 _citrus_memory_stream_get32(struct _citrus_memory_stream *ms, uint32_t *rval)
203 if (ms->ms_pos + 4 > _citrus_region_size(&ms->ms_region))
206 *rval = _citrus_region_peek32(&ms->ms_region, ms->ms_pos);
213 _citrus_memory_stream_getln_region(struct _citrus_memory_stream *ms,
214 struct _citrus_region *r)
219 ptr = _citrus_memory_stream_getln(ms, &sz);
221 _citrus_region_init(r, __DECONST(void *, ptr), sz);
223 return (ptr == NULL);