1*0d5acd74SJohn Marino /* $FreeBSD: head/lib/libc/iconv/citrus_memstream.h 219019 2011-02-25 00:04:39Z gabor $ */
2f01b2a75SJoerg Sonnenberger /* $NetBSD: citrus_memstream.h,v 1.3 2005/05/14 17:55:42 tshiozak Exp $ */
32180e8afSJoerg Sonnenberger
42180e8afSJoerg Sonnenberger /*-
52180e8afSJoerg Sonnenberger * Copyright (c)2003 Citrus Project,
62180e8afSJoerg Sonnenberger * All rights reserved.
72180e8afSJoerg Sonnenberger *
82180e8afSJoerg Sonnenberger * Redistribution and use in source and binary forms, with or without
92180e8afSJoerg Sonnenberger * modification, are permitted provided that the following conditions
102180e8afSJoerg Sonnenberger * are met:
112180e8afSJoerg Sonnenberger * 1. Redistributions of source code must retain the above copyright
122180e8afSJoerg Sonnenberger * notice, this list of conditions and the following disclaimer.
132180e8afSJoerg Sonnenberger * 2. Redistributions in binary form must reproduce the above copyright
142180e8afSJoerg Sonnenberger * notice, this list of conditions and the following disclaimer in the
152180e8afSJoerg Sonnenberger * documentation and/or other materials provided with the distribution.
162180e8afSJoerg Sonnenberger *
172180e8afSJoerg Sonnenberger * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
182180e8afSJoerg Sonnenberger * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
192180e8afSJoerg Sonnenberger * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
202180e8afSJoerg Sonnenberger * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
212180e8afSJoerg Sonnenberger * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
222180e8afSJoerg Sonnenberger * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
232180e8afSJoerg Sonnenberger * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
242180e8afSJoerg Sonnenberger * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
252180e8afSJoerg Sonnenberger * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
262180e8afSJoerg Sonnenberger * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
272180e8afSJoerg Sonnenberger * SUCH DAMAGE.
282180e8afSJoerg Sonnenberger *
292180e8afSJoerg Sonnenberger */
302180e8afSJoerg Sonnenberger
312180e8afSJoerg Sonnenberger #ifndef _CITRUS_MEMSTREAM_H_
322180e8afSJoerg Sonnenberger #define _CITRUS_MEMSTREAM_H_
332180e8afSJoerg Sonnenberger
342180e8afSJoerg Sonnenberger struct _citrus_memory_stream {
352180e8afSJoerg Sonnenberger struct _citrus_region ms_region;
362180e8afSJoerg Sonnenberger size_t ms_pos;
372180e8afSJoerg Sonnenberger };
382180e8afSJoerg Sonnenberger
392180e8afSJoerg Sonnenberger __BEGIN_DECLS
402180e8afSJoerg Sonnenberger const char *_citrus_memory_stream_getln(
41*0d5acd74SJohn Marino struct _citrus_memory_stream * __restrict,
42*0d5acd74SJohn Marino size_t * __restrict);
432180e8afSJoerg Sonnenberger const char *_citrus_memory_stream_matchline(
44*0d5acd74SJohn Marino struct _citrus_memory_stream * __restrict,
45*0d5acd74SJohn Marino const char * __restrict, size_t * __restrict, int);
462180e8afSJoerg Sonnenberger void *_citrus_memory_stream_chr(struct _citrus_memory_stream *,
472180e8afSJoerg Sonnenberger struct _citrus_region *, char);
482180e8afSJoerg Sonnenberger void _citrus_memory_stream_skip_ws(struct _citrus_memory_stream *);
492180e8afSJoerg Sonnenberger __END_DECLS
502180e8afSJoerg Sonnenberger
512180e8afSJoerg Sonnenberger static __inline int
_citrus_memory_stream_iseof(struct _citrus_memory_stream * ms)522180e8afSJoerg Sonnenberger _citrus_memory_stream_iseof(struct _citrus_memory_stream *ms)
532180e8afSJoerg Sonnenberger {
54*0d5acd74SJohn Marino
55*0d5acd74SJohn Marino return (ms->ms_pos >= _citrus_region_size(&ms->ms_region));
562180e8afSJoerg Sonnenberger }
572180e8afSJoerg Sonnenberger
582180e8afSJoerg Sonnenberger static __inline void
_citrus_memory_stream_bind(struct _citrus_memory_stream * __restrict ms,const struct _citrus_region * __restrict r)592180e8afSJoerg Sonnenberger _citrus_memory_stream_bind(struct _citrus_memory_stream * __restrict ms,
602180e8afSJoerg Sonnenberger const struct _citrus_region * __restrict r)
612180e8afSJoerg Sonnenberger {
62*0d5acd74SJohn Marino
632180e8afSJoerg Sonnenberger ms->ms_region = *r;
642180e8afSJoerg Sonnenberger ms->ms_pos = 0;
652180e8afSJoerg Sonnenberger }
662180e8afSJoerg Sonnenberger
672180e8afSJoerg Sonnenberger static __inline void
_citrus_memory_stream_bind_ptr(struct _citrus_memory_stream * __restrict ms,void * ptr,size_t sz)68f01b2a75SJoerg Sonnenberger _citrus_memory_stream_bind_ptr(struct _citrus_memory_stream * __restrict ms,
69f01b2a75SJoerg Sonnenberger void *ptr, size_t sz)
70f01b2a75SJoerg Sonnenberger {
71f01b2a75SJoerg Sonnenberger struct _citrus_region r;
72f01b2a75SJoerg Sonnenberger
73f01b2a75SJoerg Sonnenberger _citrus_region_init(&r, ptr, sz);
74f01b2a75SJoerg Sonnenberger _citrus_memory_stream_bind(ms, &r);
75f01b2a75SJoerg Sonnenberger }
76f01b2a75SJoerg Sonnenberger
77f01b2a75SJoerg Sonnenberger static __inline void
_citrus_memory_stream_rewind(struct _citrus_memory_stream * ms)782180e8afSJoerg Sonnenberger _citrus_memory_stream_rewind(struct _citrus_memory_stream *ms)
792180e8afSJoerg Sonnenberger {
80*0d5acd74SJohn Marino
812180e8afSJoerg Sonnenberger ms->ms_pos = 0;
822180e8afSJoerg Sonnenberger }
832180e8afSJoerg Sonnenberger
842180e8afSJoerg Sonnenberger static __inline size_t
_citrus_memory_stream_tell(struct _citrus_memory_stream * ms)85f01b2a75SJoerg Sonnenberger _citrus_memory_stream_tell(struct _citrus_memory_stream *ms)
86f01b2a75SJoerg Sonnenberger {
87*0d5acd74SJohn Marino
88*0d5acd74SJohn Marino return (ms->ms_pos);
89f01b2a75SJoerg Sonnenberger }
90f01b2a75SJoerg Sonnenberger
91f01b2a75SJoerg Sonnenberger static __inline size_t
_citrus_memory_stream_remainder(struct _citrus_memory_stream * ms)922180e8afSJoerg Sonnenberger _citrus_memory_stream_remainder(struct _citrus_memory_stream *ms)
932180e8afSJoerg Sonnenberger {
942180e8afSJoerg Sonnenberger size_t sz;
95*0d5acd74SJohn Marino
962180e8afSJoerg Sonnenberger sz = _citrus_region_size(&ms->ms_region);
972180e8afSJoerg Sonnenberger if (ms->ms_pos>sz)
98*0d5acd74SJohn Marino return (0);
99*0d5acd74SJohn Marino return (sz-ms->ms_pos);
1002180e8afSJoerg Sonnenberger }
1012180e8afSJoerg Sonnenberger
1022180e8afSJoerg Sonnenberger static __inline int
_citrus_memory_stream_seek(struct _citrus_memory_stream * ms,size_t pos,int w)1032180e8afSJoerg Sonnenberger _citrus_memory_stream_seek(struct _citrus_memory_stream *ms, size_t pos, int w)
1042180e8afSJoerg Sonnenberger {
105*0d5acd74SJohn Marino size_t sz;
106*0d5acd74SJohn Marino
107*0d5acd74SJohn Marino sz = _citrus_region_size(&ms->ms_region);
108*0d5acd74SJohn Marino
1092180e8afSJoerg Sonnenberger switch (w) {
1102180e8afSJoerg Sonnenberger case SEEK_SET:
1112180e8afSJoerg Sonnenberger if (pos >= sz)
112*0d5acd74SJohn Marino return (-1);
1132180e8afSJoerg Sonnenberger ms->ms_pos = pos;
1142180e8afSJoerg Sonnenberger break;
1152180e8afSJoerg Sonnenberger case SEEK_CUR:
116f01b2a75SJoerg Sonnenberger pos += (ssize_t)ms->ms_pos;
1172180e8afSJoerg Sonnenberger if (pos >= sz)
118*0d5acd74SJohn Marino return (-1);
119f01b2a75SJoerg Sonnenberger ms->ms_pos = pos;
1202180e8afSJoerg Sonnenberger break;
1212180e8afSJoerg Sonnenberger case SEEK_END:
1222180e8afSJoerg Sonnenberger if (sz < pos)
123*0d5acd74SJohn Marino return (-1);
1242180e8afSJoerg Sonnenberger ms->ms_pos = sz - pos;
1252180e8afSJoerg Sonnenberger break;
1262180e8afSJoerg Sonnenberger }
127*0d5acd74SJohn Marino return (0);
1282180e8afSJoerg Sonnenberger }
1292180e8afSJoerg Sonnenberger
1302180e8afSJoerg Sonnenberger static __inline int
_citrus_memory_stream_getc(struct _citrus_memory_stream * ms)1312180e8afSJoerg Sonnenberger _citrus_memory_stream_getc(struct _citrus_memory_stream *ms)
1322180e8afSJoerg Sonnenberger {
133*0d5acd74SJohn Marino
1342180e8afSJoerg Sonnenberger if (_citrus_memory_stream_iseof(ms))
1352180e8afSJoerg Sonnenberger return (EOF);
136*0d5acd74SJohn Marino return (_citrus_region_peek8(&ms->ms_region, ms->ms_pos++));
1372180e8afSJoerg Sonnenberger }
1382180e8afSJoerg Sonnenberger
139f01b2a75SJoerg Sonnenberger static __inline void
_citrus_memory_stream_ungetc(struct _citrus_memory_stream * ms,int ch)140f01b2a75SJoerg Sonnenberger _citrus_memory_stream_ungetc(struct _citrus_memory_stream *ms, int ch)
141f01b2a75SJoerg Sonnenberger {
142*0d5acd74SJohn Marino
143f01b2a75SJoerg Sonnenberger if (ch != EOF && ms->ms_pos > 0)
144f01b2a75SJoerg Sonnenberger ms->ms_pos--;
145f01b2a75SJoerg Sonnenberger }
146f01b2a75SJoerg Sonnenberger
1472180e8afSJoerg Sonnenberger static __inline int
_citrus_memory_stream_peek(struct _citrus_memory_stream * ms)1482180e8afSJoerg Sonnenberger _citrus_memory_stream_peek(struct _citrus_memory_stream *ms)
1492180e8afSJoerg Sonnenberger {
150*0d5acd74SJohn Marino
1512180e8afSJoerg Sonnenberger if (_citrus_memory_stream_iseof(ms))
1522180e8afSJoerg Sonnenberger return (EOF);
153*0d5acd74SJohn Marino return (_citrus_region_peek8(&ms->ms_region, ms->ms_pos));
1542180e8afSJoerg Sonnenberger }
1552180e8afSJoerg Sonnenberger
1562180e8afSJoerg Sonnenberger static __inline void *
_citrus_memory_stream_getregion(struct _citrus_memory_stream * ms,struct _citrus_region * r,size_t sz)1572180e8afSJoerg Sonnenberger _citrus_memory_stream_getregion(struct _citrus_memory_stream *ms,
1582180e8afSJoerg Sonnenberger struct _citrus_region *r, size_t sz)
1592180e8afSJoerg Sonnenberger {
1602180e8afSJoerg Sonnenberger void *ret;
1612180e8afSJoerg Sonnenberger
1622180e8afSJoerg Sonnenberger if (ms->ms_pos + sz > _citrus_region_size(&ms->ms_region))
163*0d5acd74SJohn Marino return (NULL);
1642180e8afSJoerg Sonnenberger
1652180e8afSJoerg Sonnenberger ret = _citrus_region_offset(&ms->ms_region, ms->ms_pos);
1662180e8afSJoerg Sonnenberger ms->ms_pos += sz;
1672180e8afSJoerg Sonnenberger if (r)
1682180e8afSJoerg Sonnenberger _citrus_region_init(r, ret, sz);
1692180e8afSJoerg Sonnenberger
170*0d5acd74SJohn Marino return (ret);
1712180e8afSJoerg Sonnenberger }
1722180e8afSJoerg Sonnenberger
1732180e8afSJoerg Sonnenberger static __inline int
_citrus_memory_stream_get8(struct _citrus_memory_stream * ms,uint8_t * rval)1742180e8afSJoerg Sonnenberger _citrus_memory_stream_get8(struct _citrus_memory_stream *ms, uint8_t *rval)
1752180e8afSJoerg Sonnenberger {
1762180e8afSJoerg Sonnenberger
1772180e8afSJoerg Sonnenberger if (ms->ms_pos + 1 > _citrus_region_size(&ms->ms_region))
178*0d5acd74SJohn Marino return (-1);
1792180e8afSJoerg Sonnenberger
1802180e8afSJoerg Sonnenberger *rval = _citrus_region_peek8(&ms->ms_region, ms->ms_pos);
1812180e8afSJoerg Sonnenberger ms->ms_pos += 2;
1822180e8afSJoerg Sonnenberger
183*0d5acd74SJohn Marino return (0);
1842180e8afSJoerg Sonnenberger }
1852180e8afSJoerg Sonnenberger
1862180e8afSJoerg Sonnenberger static __inline int
_citrus_memory_stream_get16(struct _citrus_memory_stream * ms,uint16_t * rval)1872180e8afSJoerg Sonnenberger _citrus_memory_stream_get16(struct _citrus_memory_stream *ms, uint16_t *rval)
1882180e8afSJoerg Sonnenberger {
1892180e8afSJoerg Sonnenberger
1902180e8afSJoerg Sonnenberger if (ms->ms_pos + 2 > _citrus_region_size(&ms->ms_region))
191*0d5acd74SJohn Marino return (-1);
1922180e8afSJoerg Sonnenberger
1932180e8afSJoerg Sonnenberger *rval = _citrus_region_peek16(&ms->ms_region, ms->ms_pos);
1942180e8afSJoerg Sonnenberger ms->ms_pos += 2;
1952180e8afSJoerg Sonnenberger
196*0d5acd74SJohn Marino return (0);
1972180e8afSJoerg Sonnenberger }
1982180e8afSJoerg Sonnenberger
1992180e8afSJoerg Sonnenberger static __inline int
_citrus_memory_stream_get32(struct _citrus_memory_stream * ms,uint32_t * rval)2002180e8afSJoerg Sonnenberger _citrus_memory_stream_get32(struct _citrus_memory_stream *ms, uint32_t *rval)
2012180e8afSJoerg Sonnenberger {
2022180e8afSJoerg Sonnenberger
2032180e8afSJoerg Sonnenberger if (ms->ms_pos + 4 > _citrus_region_size(&ms->ms_region))
204*0d5acd74SJohn Marino return (-1);
2052180e8afSJoerg Sonnenberger
2062180e8afSJoerg Sonnenberger *rval = _citrus_region_peek32(&ms->ms_region, ms->ms_pos);
2072180e8afSJoerg Sonnenberger ms->ms_pos += 4;
2082180e8afSJoerg Sonnenberger
209*0d5acd74SJohn Marino return (0);
2102180e8afSJoerg Sonnenberger }
2112180e8afSJoerg Sonnenberger
212f01b2a75SJoerg Sonnenberger static __inline int
_citrus_memory_stream_getln_region(struct _citrus_memory_stream * ms,struct _citrus_region * r)213f01b2a75SJoerg Sonnenberger _citrus_memory_stream_getln_region(struct _citrus_memory_stream *ms,
214f01b2a75SJoerg Sonnenberger struct _citrus_region *r)
215f01b2a75SJoerg Sonnenberger {
216f01b2a75SJoerg Sonnenberger const char *ptr;
217f01b2a75SJoerg Sonnenberger size_t sz;
218f01b2a75SJoerg Sonnenberger
219f01b2a75SJoerg Sonnenberger ptr = _citrus_memory_stream_getln(ms, &sz);
220f01b2a75SJoerg Sonnenberger if (ptr)
221*0d5acd74SJohn Marino _citrus_region_init(r, __DECONST(void *, ptr), sz);
222f01b2a75SJoerg Sonnenberger
223*0d5acd74SJohn Marino return (ptr == NULL);
224f01b2a75SJoerg Sonnenberger }
225f01b2a75SJoerg Sonnenberger
2262180e8afSJoerg Sonnenberger #endif
227