1219019Sgabor/* $FreeBSD$ */ 2219019Sgabor/* $NetBSD: citrus_memstream.h,v 1.3 2005/05/14 17:55:42 tshiozak Exp $ */ 3219019Sgabor 4219019Sgabor/*- 5219019Sgabor * Copyright (c)2003 Citrus Project, 6219019Sgabor * All rights reserved. 7219019Sgabor * 8219019Sgabor * Redistribution and use in source and binary forms, with or without 9219019Sgabor * modification, are permitted provided that the following conditions 10219019Sgabor * are met: 11219019Sgabor * 1. Redistributions of source code must retain the above copyright 12219019Sgabor * notice, this list of conditions and the following disclaimer. 13219019Sgabor * 2. Redistributions in binary form must reproduce the above copyright 14219019Sgabor * notice, this list of conditions and the following disclaimer in the 15219019Sgabor * documentation and/or other materials provided with the distribution. 16219019Sgabor * 17219019Sgabor * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18219019Sgabor * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19219019Sgabor * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20219019Sgabor * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21219019Sgabor * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22219019Sgabor * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23219019Sgabor * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24219019Sgabor * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25219019Sgabor * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26219019Sgabor * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27219019Sgabor * SUCH DAMAGE. 28219019Sgabor * 29219019Sgabor */ 30219019Sgabor 31219019Sgabor#ifndef _CITRUS_MEMSTREAM_H_ 32219019Sgabor#define _CITRUS_MEMSTREAM_H_ 33219019Sgabor 34219019Sgaborstruct _citrus_memory_stream { 35219019Sgabor struct _citrus_region ms_region; 36219019Sgabor size_t ms_pos; 37219019Sgabor}; 38219019Sgabor 39219019Sgabor__BEGIN_DECLS 40219019Sgaborconst char *_citrus_memory_stream_getln( 41219019Sgabor struct _citrus_memory_stream * __restrict, 42219019Sgabor size_t * __restrict); 43219019Sgaborconst char *_citrus_memory_stream_matchline( 44219019Sgabor struct _citrus_memory_stream * __restrict, 45219019Sgabor const char * __restrict, size_t * __restrict, int); 46219019Sgaborvoid *_citrus_memory_stream_chr(struct _citrus_memory_stream *, 47219019Sgabor struct _citrus_region *, char); 48219019Sgaborvoid _citrus_memory_stream_skip_ws(struct _citrus_memory_stream *); 49219019Sgabor__END_DECLS 50219019Sgabor 51219019Sgaborstatic __inline int 52219019Sgabor_citrus_memory_stream_iseof(struct _citrus_memory_stream *ms) 53219019Sgabor{ 54219019Sgabor 55219019Sgabor return (ms->ms_pos >= _citrus_region_size(&ms->ms_region)); 56219019Sgabor} 57219019Sgabor 58219019Sgaborstatic __inline void 59219019Sgabor_citrus_memory_stream_bind(struct _citrus_memory_stream * __restrict ms, 60219019Sgabor const struct _citrus_region * __restrict r) 61219019Sgabor{ 62219019Sgabor 63219019Sgabor ms->ms_region = *r; 64219019Sgabor ms->ms_pos = 0; 65219019Sgabor} 66219019Sgabor 67219019Sgaborstatic __inline void 68219019Sgabor_citrus_memory_stream_bind_ptr(struct _citrus_memory_stream * __restrict ms, 69219019Sgabor void *ptr, size_t sz) 70219019Sgabor{ 71219019Sgabor struct _citrus_region r; 72219019Sgabor 73219019Sgabor _citrus_region_init(&r, ptr, sz); 74219019Sgabor _citrus_memory_stream_bind(ms, &r); 75219019Sgabor} 76219019Sgabor 77219019Sgaborstatic __inline void 78219019Sgabor_citrus_memory_stream_rewind(struct _citrus_memory_stream *ms) 79219019Sgabor{ 80219019Sgabor 81219019Sgabor ms->ms_pos = 0; 82219019Sgabor} 83219019Sgabor 84219019Sgaborstatic __inline size_t 85219019Sgabor_citrus_memory_stream_tell(struct _citrus_memory_stream *ms) 86219019Sgabor{ 87219019Sgabor 88219019Sgabor return (ms->ms_pos); 89219019Sgabor} 90219019Sgabor 91219019Sgaborstatic __inline size_t 92219019Sgabor_citrus_memory_stream_remainder(struct _citrus_memory_stream *ms) 93219019Sgabor{ 94219019Sgabor size_t sz; 95219019Sgabor 96219019Sgabor sz = _citrus_region_size(&ms->ms_region); 97219019Sgabor if (ms->ms_pos>sz) 98219019Sgabor return (0); 99219019Sgabor return (sz-ms->ms_pos); 100219019Sgabor} 101219019Sgabor 102219019Sgaborstatic __inline int 103219019Sgabor_citrus_memory_stream_seek(struct _citrus_memory_stream *ms, size_t pos, int w) 104219019Sgabor{ 105219019Sgabor size_t sz; 106219019Sgabor 107219019Sgabor sz = _citrus_region_size(&ms->ms_region); 108219019Sgabor 109219019Sgabor switch (w) { 110219019Sgabor case SEEK_SET: 111219019Sgabor if (pos >= sz) 112219019Sgabor return (-1); 113219019Sgabor ms->ms_pos = pos; 114219019Sgabor break; 115219019Sgabor case SEEK_CUR: 116219019Sgabor pos += (ssize_t)ms->ms_pos; 117219019Sgabor if (pos >= sz) 118219019Sgabor return (-1); 119219019Sgabor ms->ms_pos = pos; 120219019Sgabor break; 121219019Sgabor case SEEK_END: 122219019Sgabor if (sz < pos) 123219019Sgabor return (-1); 124219019Sgabor ms->ms_pos = sz - pos; 125219019Sgabor break; 126219019Sgabor } 127219019Sgabor return (0); 128219019Sgabor} 129219019Sgabor 130219019Sgaborstatic __inline int 131219019Sgabor_citrus_memory_stream_getc(struct _citrus_memory_stream *ms) 132219019Sgabor{ 133219019Sgabor 134219019Sgabor if (_citrus_memory_stream_iseof(ms)) 135219019Sgabor return (EOF); 136219019Sgabor return (_citrus_region_peek8(&ms->ms_region, ms->ms_pos++)); 137219019Sgabor} 138219019Sgabor 139219019Sgaborstatic __inline void 140219019Sgabor_citrus_memory_stream_ungetc(struct _citrus_memory_stream *ms, int ch) 141219019Sgabor{ 142219019Sgabor 143219019Sgabor if (ch != EOF && ms->ms_pos > 0) 144219019Sgabor ms->ms_pos--; 145219019Sgabor} 146219019Sgabor 147219019Sgaborstatic __inline int 148219019Sgabor_citrus_memory_stream_peek(struct _citrus_memory_stream *ms) 149219019Sgabor{ 150219019Sgabor 151219019Sgabor if (_citrus_memory_stream_iseof(ms)) 152219019Sgabor return (EOF); 153219019Sgabor return (_citrus_region_peek8(&ms->ms_region, ms->ms_pos)); 154219019Sgabor} 155219019Sgabor 156219019Sgaborstatic __inline void * 157219019Sgabor_citrus_memory_stream_getregion(struct _citrus_memory_stream *ms, 158219019Sgabor struct _citrus_region *r, size_t sz) 159219019Sgabor{ 160219019Sgabor void *ret; 161219019Sgabor 162219019Sgabor if (ms->ms_pos + sz > _citrus_region_size(&ms->ms_region)) 163219019Sgabor return (NULL); 164219019Sgabor 165219019Sgabor ret = _citrus_region_offset(&ms->ms_region, ms->ms_pos); 166219019Sgabor ms->ms_pos += sz; 167219019Sgabor if (r) 168219019Sgabor _citrus_region_init(r, ret, sz); 169219019Sgabor 170219019Sgabor return (ret); 171219019Sgabor} 172219019Sgabor 173219019Sgaborstatic __inline int 174219019Sgabor_citrus_memory_stream_get8(struct _citrus_memory_stream *ms, uint8_t *rval) 175219019Sgabor{ 176219019Sgabor 177219019Sgabor if (ms->ms_pos + 1 > _citrus_region_size(&ms->ms_region)) 178219019Sgabor return (-1); 179219019Sgabor 180219019Sgabor *rval = _citrus_region_peek8(&ms->ms_region, ms->ms_pos); 181219019Sgabor ms->ms_pos += 2; 182219019Sgabor 183219019Sgabor return (0); 184219019Sgabor} 185219019Sgabor 186219019Sgaborstatic __inline int 187219019Sgabor_citrus_memory_stream_get16(struct _citrus_memory_stream *ms, uint16_t *rval) 188219019Sgabor{ 189219019Sgabor 190219019Sgabor if (ms->ms_pos + 2 > _citrus_region_size(&ms->ms_region)) 191219019Sgabor return (-1); 192219019Sgabor 193219019Sgabor *rval = _citrus_region_peek16(&ms->ms_region, ms->ms_pos); 194219019Sgabor ms->ms_pos += 2; 195219019Sgabor 196219019Sgabor return (0); 197219019Sgabor} 198219019Sgabor 199219019Sgaborstatic __inline int 200219019Sgabor_citrus_memory_stream_get32(struct _citrus_memory_stream *ms, uint32_t *rval) 201219019Sgabor{ 202219019Sgabor 203219019Sgabor if (ms->ms_pos + 4 > _citrus_region_size(&ms->ms_region)) 204219019Sgabor return (-1); 205219019Sgabor 206219019Sgabor *rval = _citrus_region_peek32(&ms->ms_region, ms->ms_pos); 207219019Sgabor ms->ms_pos += 4; 208219019Sgabor 209219019Sgabor return (0); 210219019Sgabor} 211219019Sgabor 212219019Sgaborstatic __inline int 213219019Sgabor_citrus_memory_stream_getln_region(struct _citrus_memory_stream *ms, 214219019Sgabor struct _citrus_region *r) 215219019Sgabor{ 216219019Sgabor const char *ptr; 217219019Sgabor size_t sz; 218219019Sgabor 219219019Sgabor ptr = _citrus_memory_stream_getln(ms, &sz); 220219019Sgabor if (ptr) 221219019Sgabor _citrus_region_init(r, __DECONST(void *, ptr), sz); 222219019Sgabor 223219019Sgabor return (ptr == NULL); 224219019Sgabor} 225219019Sgabor 226219019Sgabor#endif 227