This patch imports the unmodified current version of NetBSD libc. The NetBSD includes are in /nbsd_include, while the libc code itself is split between lib/nbsd_libc and common/lib/libc.
213 lines
5.3 KiB
C
213 lines
5.3 KiB
C
/* $NetBSD: citrus_memstream.h,v 1.3 2005/05/14 17:55:42 tshiozak Exp $ */
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/*-
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* Copyright (c)2003 Citrus Project,
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#ifndef _CITRUS_MEMSTREAM_H_
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#define _CITRUS_MEMSTREAM_H_
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struct _citrus_memory_stream {
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struct _citrus_region ms_region;
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size_t ms_pos;
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};
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__BEGIN_DECLS
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const char * _citrus_memory_stream_getln(
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struct _citrus_memory_stream * __restrict, size_t * __restrict);
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const char * _citrus_memory_stream_matchline(
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struct _citrus_memory_stream * __restrict, const char * __restrict,
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size_t * __restrict, int);
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void * _citrus_memory_stream_chr(struct _citrus_memory_stream *,
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struct _citrus_region *, char);
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void _citrus_memory_stream_skip_ws(struct _citrus_memory_stream *);
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__END_DECLS
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static __inline int
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_citrus_memory_stream_iseof(struct _citrus_memory_stream *ms)
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{
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return ms->ms_pos >= _citrus_region_size(&ms->ms_region);
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}
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static __inline void
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_citrus_memory_stream_bind(struct _citrus_memory_stream * __restrict ms,
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const struct _citrus_region * __restrict r)
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{
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ms->ms_region = *r;
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ms->ms_pos = 0;
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}
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static __inline void
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_citrus_memory_stream_bind_ptr(struct _citrus_memory_stream * __restrict ms,
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void *ptr, size_t sz)
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{
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struct _citrus_region r;
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_citrus_region_init(&r, ptr, sz);
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_citrus_memory_stream_bind(ms, &r);
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}
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static __inline void
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_citrus_memory_stream_rewind(struct _citrus_memory_stream *ms)
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{
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ms->ms_pos = 0;
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}
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static __inline size_t
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_citrus_memory_stream_tell(struct _citrus_memory_stream *ms)
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{
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return ms->ms_pos;
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}
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static __inline size_t
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_citrus_memory_stream_remainder(struct _citrus_memory_stream *ms)
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{
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size_t sz;
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sz = _citrus_region_size(&ms->ms_region);
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if (ms->ms_pos>sz)
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return 0;
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return sz-ms->ms_pos;
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}
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static __inline int
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_citrus_memory_stream_seek(struct _citrus_memory_stream *ms, size_t pos, int w)
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{
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size_t sz = _citrus_region_size(&ms->ms_region);
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switch (w) {
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case SEEK_SET:
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if (pos>=sz)
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return -1;
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ms->ms_pos = pos;
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break;
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case SEEK_CUR:
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pos += (ssize_t)ms->ms_pos;
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if (pos>=sz)
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return -1;
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ms->ms_pos = pos;
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break;
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case SEEK_END:
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if (sz<pos)
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return -1;
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ms->ms_pos = sz - pos;
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break;
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}
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return 0;
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}
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static __inline int
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_citrus_memory_stream_getc(struct _citrus_memory_stream *ms)
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{
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if (_citrus_memory_stream_iseof(ms))
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return (EOF);
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return _citrus_region_peek8(&ms->ms_region, ms->ms_pos++);
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}
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static __inline void
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_citrus_memory_stream_ungetc(struct _citrus_memory_stream *ms, int ch)
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{
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if (ch != EOF && ms->ms_pos > 0)
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ms->ms_pos--;
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}
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static __inline int
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_citrus_memory_stream_peek(struct _citrus_memory_stream *ms)
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{
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if (_citrus_memory_stream_iseof(ms))
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return (EOF);
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return _citrus_region_peek8(&ms->ms_region, ms->ms_pos);
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}
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static __inline void *
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_citrus_memory_stream_getregion(struct _citrus_memory_stream *ms,
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struct _citrus_region *r, size_t sz)
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{
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void *ret;
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if (ms->ms_pos + sz > _citrus_region_size(&ms->ms_region))
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return NULL;
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ret = _citrus_region_offset(&ms->ms_region, ms->ms_pos);
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ms->ms_pos += sz;
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if (r)
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_citrus_region_init(r, ret, sz);
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return ret;
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}
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static __inline int
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_citrus_memory_stream_get8(struct _citrus_memory_stream *ms, uint8_t *rval)
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{
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if (ms->ms_pos + 1 > _citrus_region_size(&ms->ms_region))
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return -1;
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*rval = _citrus_region_peek8(&ms->ms_region, ms->ms_pos);
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ms->ms_pos += 2;
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return 0;
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}
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static __inline int
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_citrus_memory_stream_get16(struct _citrus_memory_stream *ms, uint16_t *rval)
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{
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if (ms->ms_pos + 2 > _citrus_region_size(&ms->ms_region))
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return -1;
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*rval = _citrus_region_peek16(&ms->ms_region, ms->ms_pos);
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ms->ms_pos += 2;
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return 0;
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}
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static __inline int
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_citrus_memory_stream_get32(struct _citrus_memory_stream *ms, uint32_t *rval)
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{
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if (ms->ms_pos + 4 > _citrus_region_size(&ms->ms_region))
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return -1;
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*rval = _citrus_region_peek32(&ms->ms_region, ms->ms_pos);
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ms->ms_pos += 4;
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return 0;
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}
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static __inline int
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_citrus_memory_stream_getln_region(struct _citrus_memory_stream *ms,
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struct _citrus_region *r)
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{
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const char *ptr;
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size_t sz;
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ptr = _citrus_memory_stream_getln(ms, &sz);
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if (ptr)
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_citrus_region_init(r, __UNCONST(ptr), sz);
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return ptr == NULL;
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}
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#endif
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