1/*	$NetBSD: citrus_memstream.c,v 1.4 2009/02/03 05:02:12 lukem Exp $	*/
2
3/*-
4 * Copyright (c)2003 Citrus Project,
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30#if defined(LIBC_SCCS) && !defined(lint)
31__RCSID("$NetBSD: citrus_memstream.c,v 1.4 2009/02/03 05:02:12 lukem Exp $");
32#endif /* LIBC_SCCS and not lint */
33
34#include "namespace.h"
35#include <assert.h>
36#include <stdio.h>
37#include <stdlib.h>
38#include <string.h>
39
40#include "citrus_namespace.h"
41#include "citrus_region.h"
42#include "citrus_memstream.h"
43#include "citrus_bcs.h"
44
45const char *
46_citrus_memory_stream_getln(struct _citrus_memory_stream * __restrict ms,
47			    size_t * __restrict rlen)
48{
49	size_t i;
50	const uint8_t *h, *p;
51	size_t ret;
52
53	if (ms->ms_pos>=_region_size(&ms->ms_region))
54		return (NULL);
55
56	h = p = (uint8_t *)_region_offset(&ms->ms_region, ms->ms_pos);
57	ret = 0;
58	for (i = _region_size(&ms->ms_region) - ms->ms_pos; i > 0; i--) {
59		ret++;
60		if (_bcs_iseol(*p))
61			break;
62		p++;
63	}
64
65	ms->ms_pos += ret;
66	*rlen = ret;
67	return ((const char *)h);
68}
69
70#define T_COMM	'#'
71
72const char *
73_citrus_memory_stream_matchline(struct _citrus_memory_stream * __restrict ms,
74				const char * __restrict key,
75				size_t * __restrict rlen,
76				int iscasesensitive)
77{
78	const char *p, *q;
79	size_t len, keylen;
80
81	keylen = strlen(key);
82	while (/*CONSTCOND*/ 1) {
83		p = _citrus_memory_stream_getln(ms, &len);
84		if (p == NULL)
85			return (NULL);
86
87		/* ignore comment */
88		q = memchr(p, T_COMM, len);
89		if (q) {
90			len = q-p;
91		}
92		/* ignore trailing white space and newline */
93		_bcs_trunc_rws_len(p, &len);
94		if (len == 0)
95			continue; /* ignore null line */
96
97		/* skip white spaces at the head of the line */
98		p = _bcs_skip_ws_len(p, &len);
99		q = _bcs_skip_nonws_len(p, &len);
100
101		if ((size_t)(q-p) == keylen) {
102			if (iscasesensitive) {
103				if (memcmp(key, p, keylen) == 0)
104					break; /* match */
105			} else {
106				if (_bcs_strncasecmp(key, p, keylen) == 0)
107					break; /* match */
108			}
109		}
110	}
111
112	p = _bcs_skip_ws_len(q, &len);
113	*rlen = len;
114
115	return (p);
116}
117
118void *
119_citrus_memory_stream_chr(struct _citrus_memory_stream *ms,
120			  struct _citrus_region *r, char ch)
121{
122	void *head, *chr;
123	size_t sz;
124
125	if (ms->ms_pos >= _region_size(&ms->ms_region))
126		return NULL;
127
128	head = _region_offset(&ms->ms_region, ms->ms_pos);
129	chr = memchr(head, ch, _memstream_remainder(ms));
130	if (chr == NULL) {
131		_region_init(r, head, _memstream_remainder(ms));
132		ms->ms_pos = _region_size(&ms->ms_region);
133		return NULL;
134	}
135	sz = (char *)chr - (char *)head;
136
137	_region_init(r, head, sz);
138	ms->ms_pos += sz+1;
139
140	return chr;
141}
142
143void
144_citrus_memory_stream_skip_ws(struct _citrus_memory_stream *ms)
145{
146	int ch;
147
148	while ((ch = _memstream_peek(ms)) != EOF) {
149		if (!_bcs_isspace(ch))
150			break;
151		_memstream_getc(ms);
152	}
153}
154