1 /* $FreeBSD$ */ 2 /* $NetBSD: citrus_memstream.c,v 1.5 2012/03/13 21:13:31 christos Exp $ */ 3 4 /*- 5 * SPDX-License-Identifier: BSD-2-Clause 6 * 7 * Copyright (c)2003 Citrus Project, 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 34 #include <assert.h> 35 #include <stdio.h> 36 #include <stdlib.h> 37 #include <string.h> 38 39 #include "citrus_namespace.h" 40 #include "citrus_region.h" 41 #include "citrus_memstream.h" 42 #include "citrus_bcs.h" 43 44 const char * 45 _citrus_memory_stream_getln(struct _citrus_memory_stream * __restrict ms, 46 size_t * __restrict rlen) 47 { 48 const uint8_t *h, *p; 49 size_t i, ret; 50 51 if (ms->ms_pos>=_region_size(&ms->ms_region)) 52 return (NULL); 53 54 h = p = (uint8_t *)_region_offset(&ms->ms_region, ms->ms_pos); 55 ret = 0; 56 for (i = _region_size(&ms->ms_region) - ms->ms_pos; i > 0; i--) { 57 ret++; 58 if (_bcs_iseol(*p)) 59 break; 60 p++; 61 } 62 63 ms->ms_pos += ret; 64 *rlen = ret; 65 return ((const char *)h); 66 } 67 68 #define T_COMM '#' 69 70 const char * 71 _citrus_memory_stream_matchline(struct _citrus_memory_stream * __restrict ms, 72 const char * __restrict key, size_t * __restrict rlen, int iscasesensitive) 73 { 74 const char *p, *q; 75 size_t keylen, len; 76 77 keylen = strlen(key); 78 for(;;) { 79 p = _citrus_memory_stream_getln(ms, &len); 80 if (p == NULL) 81 return (NULL); 82 83 /* ignore comment */ 84 q = memchr(p, T_COMM, len); 85 if (q) { 86 len = q - p; 87 } 88 /* ignore trailing white space and newline */ 89 _bcs_trunc_rws_len(p, &len); 90 if (len == 0) 91 continue; /* ignore null line */ 92 93 /* skip white spaces at the head of the line */ 94 p = _bcs_skip_ws_len(p, &len); 95 q = _bcs_skip_nonws_len(p, &len); 96 97 if ((size_t)(q - p) == keylen) { 98 if (iscasesensitive) { 99 if (memcmp(key, p, keylen) == 0) 100 break; /* match */ 101 } else { 102 if (_bcs_strncasecmp(key, p, keylen) == 0) 103 break; /* match */ 104 } 105 } 106 } 107 108 p = _bcs_skip_ws_len(q, &len); 109 *rlen = len; 110 111 return (p); 112 } 113 114 void * 115 _citrus_memory_stream_chr(struct _citrus_memory_stream *ms, 116 struct _citrus_region *r, char ch) 117 { 118 void *chr, *head; 119 size_t sz; 120 121 if (ms->ms_pos >= _region_size(&ms->ms_region)) 122 return (NULL); 123 124 head = _region_offset(&ms->ms_region, ms->ms_pos); 125 chr = memchr(head, ch, _memstream_remainder(ms)); 126 if (chr == NULL) { 127 _region_init(r, head, _memstream_remainder(ms)); 128 ms->ms_pos = _region_size(&ms->ms_region); 129 return (NULL); 130 } 131 sz = (char *)chr - (char *)head; 132 133 _region_init(r, head, sz); 134 ms->ms_pos += sz + 1; 135 136 return (chr); 137 } 138 139 void 140 _citrus_memory_stream_skip_ws(struct _citrus_memory_stream *ms) 141 { 142 int ch; 143 144 while ((ch = _memstream_peek(ms)) != EOF) { 145 if (!_bcs_isspace(ch)) 146 break; 147 _memstream_getc(ms); 148 } 149 } 150