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 45 const char * 46 _citrus_memory_stream_getln(struct _citrus_memory_stream * __restrict ms, 47 size_t * __restrict rlen) 48 { 49 int 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 72 const 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 } 117 118 void * 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 } 142 143 void 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