diff options
Diffstat (limited to 'lib/libc/iconv/citrus_memstream.c')
-rw-r--r-- | lib/libc/iconv/citrus_memstream.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/lib/libc/iconv/citrus_memstream.c b/lib/libc/iconv/citrus_memstream.c new file mode 100644 index 0000000..d7ad4fd --- /dev/null +++ b/lib/libc/iconv/citrus_memstream.c @@ -0,0 +1,148 @@ +/* $FreeBSD$ */ +/* $NetBSD: citrus_memstream.c,v 1.4 2009/02/03 05:02:12 lukem Exp $ */ + +/*- + * Copyright (c)2003 Citrus Project, + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> + +#include <assert.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "citrus_namespace.h" +#include "citrus_region.h" +#include "citrus_memstream.h" +#include "citrus_bcs.h" + +const char * +_citrus_memory_stream_getln(struct _citrus_memory_stream * __restrict ms, + size_t * __restrict rlen) +{ + const uint8_t *h, *p; + size_t ret; + int i; + + if (ms->ms_pos>=_region_size(&ms->ms_region)) + return (NULL); + + h = p = (uint8_t *)_region_offset(&ms->ms_region, ms->ms_pos); + ret = 0; + for (i = _region_size(&ms->ms_region) - ms->ms_pos; i > 0; i--) { + ret++; + if (_bcs_iseol(*p)) + break; + p++; + } + + ms->ms_pos += ret; + *rlen = ret; + return ((const char *)h); +} + +#define T_COMM '#' + +const char * +_citrus_memory_stream_matchline(struct _citrus_memory_stream * __restrict ms, + const char * __restrict key, size_t * __restrict rlen, int iscasesensitive) +{ + const char *p, *q; + size_t keylen, len; + + keylen = strlen(key); + for(;;) { + p = _citrus_memory_stream_getln(ms, &len); + if (p == NULL) + return (NULL); + + /* ignore comment */ + q = memchr(p, T_COMM, len); + if (q) { + len = q - p; + } + /* ignore trailing white space and newline */ + _bcs_trunc_rws_len(p, &len); + if (len == 0) + continue; /* ignore null line */ + + /* skip white spaces at the head of the line */ + p = _bcs_skip_ws_len(p, &len); + q = _bcs_skip_nonws_len(p, &len); + + if ((size_t)(q - p) == keylen) { + if (iscasesensitive) { + if (memcmp(key, p, keylen) == 0) + break; /* match */ + } else { + if (_bcs_strncasecmp(key, p, keylen) == 0) + break; /* match */ + } + } + } + + p = _bcs_skip_ws_len(q, &len); + *rlen = len; + + return (p); +} + +void * +_citrus_memory_stream_chr(struct _citrus_memory_stream *ms, + struct _citrus_region *r, char ch) +{ + void *chr, *head; + size_t sz; + + if (ms->ms_pos >= _region_size(&ms->ms_region)) + return (NULL); + + head = _region_offset(&ms->ms_region, ms->ms_pos); + chr = memchr(head, ch, _memstream_remainder(ms)); + if (chr == NULL) { + _region_init(r, head, _memstream_remainder(ms)); + ms->ms_pos = _region_size(&ms->ms_region); + return (NULL); + } + sz = (char *)chr - (char *)head; + + _region_init(r, head, sz); + ms->ms_pos += sz + 1; + + return (chr); +} + +void +_citrus_memory_stream_skip_ws(struct _citrus_memory_stream *ms) +{ + int ch; + + while ((ch = _memstream_peek(ms)) != EOF) { + if (!_bcs_isspace(ch)) + break; + _memstream_getc(ms); + } +} |