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 32 #include <assert.h> 33 #include <stdio.h> 34 #include <stdlib.h> 35 #include <string.h> 36 37 #include "citrus_namespace.h" 38 #include "citrus_region.h" 39 #include "citrus_memstream.h" 40 #include "citrus_bcs.h" 41 42 const char * 43 _citrus_memory_stream_getln(struct _citrus_memory_stream * __restrict ms, 44 size_t * __restrict rlen) 45 { 46 const uint8_t *h, *p; 47 size_t i, ret; 48 49 if (ms->ms_pos>=_region_size(&ms->ms_region)) 50 return (NULL); 51 52 h = p = (uint8_t *)_region_offset(&ms->ms_region, ms->ms_pos); 53 ret = 0; 54 for (i = _region_size(&ms->ms_region) - ms->ms_pos; i > 0; i--) { 55 ret++; 56 if (_bcs_iseol(*p)) 57 break; 58 p++; 59 } 60 61 ms->ms_pos += ret; 62 *rlen = ret; 63 return ((const char *)h); 64 } 65 66 #define T_COMM '#' 67 68 const char * 69 _citrus_memory_stream_matchline(struct _citrus_memory_stream * __restrict ms, 70 const char * __restrict key, size_t * __restrict rlen, int iscasesensitive) 71 { 72 const char *p, *q; 73 size_t keylen, len; 74 75 keylen = strlen(key); 76 for(;;) { 77 p = _citrus_memory_stream_getln(ms, &len); 78 if (p == NULL) 79 return (NULL); 80 81 /* ignore comment */ 82 q = memchr(p, T_COMM, len); 83 if (q) { 84 len = q - p; 85 } 86 /* ignore trailing white space and newline */ 87 _bcs_trunc_rws_len(p, &len); 88 if (len == 0) 89 continue; /* ignore null line */ 90 91 /* skip white spaces at the head of the line */ 92 p = _bcs_skip_ws_len(p, &len); 93 q = _bcs_skip_nonws_len(p, &len); 94 95 if ((size_t)(q - p) == keylen) { 96 if (iscasesensitive) { 97 if (memcmp(key, p, keylen) == 0) 98 break; /* match */ 99 } else { 100 if (_bcs_strncasecmp(key, p, keylen) == 0) 101 break; /* match */ 102 } 103 } 104 } 105 106 p = _bcs_skip_ws_len(q, &len); 107 *rlen = len; 108 109 return (p); 110 } 111 112 void * 113 _citrus_memory_stream_chr(struct _citrus_memory_stream *ms, 114 struct _citrus_region *r, char ch) 115 { 116 void *chr, *head; 117 size_t sz; 118 119 if (ms->ms_pos >= _region_size(&ms->ms_region)) 120 return (NULL); 121 122 head = _region_offset(&ms->ms_region, ms->ms_pos); 123 chr = memchr(head, ch, _memstream_remainder(ms)); 124 if (chr == NULL) { 125 _region_init(r, head, _memstream_remainder(ms)); 126 ms->ms_pos = _region_size(&ms->ms_region); 127 return (NULL); 128 } 129 sz = (char *)chr - (char *)head; 130 131 _region_init(r, head, sz); 132 ms->ms_pos += sz + 1; 133 134 return (chr); 135 } 136 137 void 138 _citrus_memory_stream_skip_ws(struct _citrus_memory_stream *ms) 139 { 140 int ch; 141 142 while ((ch = _memstream_peek(ms)) != EOF) { 143 if (!_bcs_isspace(ch)) 144 break; 145 _memstream_getc(ms); 146 } 147 } 148