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