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559a218c9b
These sys/cdefs.h are not needed. Purge them. They are mostly left-over from the $FreeBSD$ removal. A few in libc are still required for macros that cdefs.h defines. Keep those. Sponsored by: Netflix Differential Revision: https://reviews.freebsd.org/D42385
447 lines
10 KiB
C
447 lines
10 KiB
C
/* $NetBSD: citrus_prop.c,v 1.4 2011/03/30 08:22:01 jruoho Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c)2006 Citrus Project,
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <assert.h>
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#include <errno.h>
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#include <limits.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include "citrus_namespace.h"
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#include "citrus_bcs.h"
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#include "citrus_region.h"
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#include "citrus_memstream.h"
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#include "citrus_prop.h"
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typedef struct {
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_citrus_prop_type_t type;
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union {
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const char *str;
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int chr;
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bool boolean;
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uint64_t num;
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} u;
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} _citrus_prop_object_t;
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static __inline void
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_citrus_prop_object_init(_citrus_prop_object_t *obj, _citrus_prop_type_t type)
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{
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obj->type = type;
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memset(&obj->u, 0, sizeof(obj->u));
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}
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static __inline void
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_citrus_prop_object_uninit(_citrus_prop_object_t *obj)
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{
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if (obj->type == _CITRUS_PROP_STR)
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free(__DECONST(void *, obj->u.str));
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}
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static const char *xdigit = "0123456789ABCDEF";
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#define _CITRUS_PROP_READ_UINT_COMMON(_func_, _type_, _max_) \
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static int \
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_citrus_prop_read_##_func_##_common(struct _memstream * __restrict ms, \
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_type_ * __restrict result, int base, int neg) \
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{ \
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_type_ acc, cutoff; \
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int ch, cutlim, n; \
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char *p; \
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\
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acc = (_type_)0; \
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cutoff = _max_ / base; \
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cutlim = _max_ % base; \
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for (;;) { \
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ch = _memstream_getc(ms); \
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p = strchr(xdigit, _bcs_toupper(ch)); \
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if (p == NULL || (n = (p - xdigit)) >= base) \
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break; \
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if (acc > cutoff || (acc == cutoff && n > cutlim)) \
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break; \
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acc *= base; \
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acc += n; \
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} \
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_memstream_ungetc(ms, ch); \
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*result = neg ? -acc : acc; \
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return (0); \
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}
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_CITRUS_PROP_READ_UINT_COMMON(chr, int, UCHAR_MAX)
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_CITRUS_PROP_READ_UINT_COMMON(num, uint64_t, UINT64_MAX)
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#undef _CITRUS_PROP_READ_UINT_COMMON
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#define _CITRUS_PROP_READ_INT(_func_, _type_) \
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static int \
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_citrus_prop_read_##_func_(struct _memstream * __restrict ms, \
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_citrus_prop_object_t * __restrict obj) \
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{ \
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int base, ch, neg; \
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\
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_memstream_skip_ws(ms); \
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ch = _memstream_getc(ms); \
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neg = 0; \
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switch (ch) { \
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case '-': \
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neg = 1; \
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case '+': \
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ch = _memstream_getc(ms); \
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} \
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base = 10; \
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if (ch == '0') { \
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base -= 2; \
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ch = _memstream_getc(ms); \
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if (ch == 'x' || ch == 'X') { \
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ch = _memstream_getc(ms); \
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if (_bcs_isxdigit(ch) == 0) { \
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_memstream_ungetc(ms, ch); \
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obj->u._func_ = 0; \
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return (0); \
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} \
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base += 8; \
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} \
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} else if (_bcs_isdigit(ch) == 0) \
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return (EINVAL); \
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_memstream_ungetc(ms, ch); \
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return (_citrus_prop_read_##_func_##_common \
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(ms, &obj->u._func_, base, neg)); \
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}
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_CITRUS_PROP_READ_INT(chr, int)
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_CITRUS_PROP_READ_INT(num, uint64_t)
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#undef _CITRUS_PROP_READ_INT
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static int
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_citrus_prop_read_character_common(struct _memstream * __restrict ms,
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int * __restrict result)
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{
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int base, ch;
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ch = _memstream_getc(ms);
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if (ch != '\\')
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*result = ch;
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else {
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ch = _memstream_getc(ms);
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base = 16;
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switch (ch) {
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case 'a':
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*result = '\a';
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break;
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case 'b':
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*result = '\b';
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break;
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case 'f':
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*result = '\f';
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break;
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case 'n':
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*result = '\n';
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break;
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case 'r':
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*result = '\r';
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break;
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case 't':
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*result = '\t';
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break;
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case 'v':
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*result = '\v';
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break;
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case '0': case '1': case '2': case '3':
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case '4': case '5': case '6': case '7':
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_memstream_ungetc(ms, ch);
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base -= 8;
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/*FALLTHROUGH*/
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case 'x':
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return (_citrus_prop_read_chr_common(ms, result,
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base, 0));
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/*NOTREACHED*/
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default:
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/* unknown escape */
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*result = ch;
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}
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}
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return (0);
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}
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static int
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_citrus_prop_read_character(struct _memstream * __restrict ms,
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_citrus_prop_object_t * __restrict obj)
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{
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int ch, errnum;
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_memstream_skip_ws(ms);
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ch = _memstream_getc(ms);
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if (ch != '\'') {
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_memstream_ungetc(ms, ch);
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return (_citrus_prop_read_chr(ms, obj));
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}
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errnum = _citrus_prop_read_character_common(ms, &ch);
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if (errnum != 0)
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return (errnum);
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obj->u.chr = ch;
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ch = _memstream_getc(ms);
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if (ch != '\'')
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return (EINVAL);
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return (0);
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}
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static int
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_citrus_prop_read_bool(struct _memstream * __restrict ms,
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_citrus_prop_object_t * __restrict obj)
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{
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_memstream_skip_ws(ms);
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switch (_bcs_tolower(_memstream_getc(ms))) {
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case 't':
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if (_bcs_tolower(_memstream_getc(ms)) == 'r' &&
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_bcs_tolower(_memstream_getc(ms)) == 'u' &&
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_bcs_tolower(_memstream_getc(ms)) == 'e') {
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obj->u.boolean = true;
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return (0);
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}
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break;
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case 'f':
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if (_bcs_tolower(_memstream_getc(ms)) == 'a' &&
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_bcs_tolower(_memstream_getc(ms)) == 'l' &&
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_bcs_tolower(_memstream_getc(ms)) == 's' &&
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_bcs_tolower(_memstream_getc(ms)) == 'e') {
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obj->u.boolean = false;
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return (0);
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}
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}
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return (EINVAL);
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}
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static int
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_citrus_prop_read_str(struct _memstream * __restrict ms,
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_citrus_prop_object_t * __restrict obj)
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{
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int ch, errnum, quot;
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char *s, *t;
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#define _CITRUS_PROP_STR_BUFSIZ 512
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size_t m, n;
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m = _CITRUS_PROP_STR_BUFSIZ;
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s = malloc(m);
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if (s == NULL)
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return (ENOMEM);
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n = 0;
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_memstream_skip_ws(ms);
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quot = _memstream_getc(ms);
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switch (quot) {
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case EOF:
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goto done;
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/*NOTREACHED*/
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case '\\':
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_memstream_ungetc(ms, quot);
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quot = EOF;
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/*FALLTHROUGH*/
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case '\"': case '\'':
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break;
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default:
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s[n] = quot;
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++n, --m;
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quot = EOF;
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}
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for (;;) {
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if (m < 1) {
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m = _CITRUS_PROP_STR_BUFSIZ;
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t = realloc(s, n + m);
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if (t == NULL) {
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free(s);
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return (ENOMEM);
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}
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s = t;
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}
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ch = _memstream_getc(ms);
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if (quot == ch || (quot == EOF &&
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(ch == ';' || _bcs_isspace(ch)))) {
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done:
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s[n] = '\0';
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obj->u.str = (const char *)s;
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return (0);
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}
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_memstream_ungetc(ms, ch);
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errnum = _citrus_prop_read_character_common(ms, &ch);
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if (errnum != 0) {
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free(s);
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return (errnum);
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}
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s[n] = ch;
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++n, --m;
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}
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free(s);
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return (EINVAL);
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#undef _CITRUS_PROP_STR_BUFSIZ
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}
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typedef int (*_citrus_prop_read_type_t)(struct _memstream * __restrict,
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_citrus_prop_object_t * __restrict);
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static const _citrus_prop_read_type_t readers[] = {
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_citrus_prop_read_bool,
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_citrus_prop_read_str,
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_citrus_prop_read_character,
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_citrus_prop_read_num,
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};
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static __inline int
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_citrus_prop_read_symbol(struct _memstream * __restrict ms,
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char * __restrict s, size_t n)
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{
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int ch;
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size_t m;
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for (m = 0; m < n; ++m) {
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ch = _memstream_getc(ms);
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if (ch != '_' && _bcs_isalnum(ch) == 0)
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goto name_found;
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s[m] = ch;
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}
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ch = _memstream_getc(ms);
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if (ch == '_' || _bcs_isalnum(ch) != 0)
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return (EINVAL);
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name_found:
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_memstream_ungetc(ms, ch);
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s[m] = '\0';
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return (0);
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}
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static int
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_citrus_prop_parse_element(struct _memstream * __restrict ms,
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const _citrus_prop_hint_t * __restrict hints, void * __restrict context)
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{
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int ch, errnum;
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#define _CITRUS_PROP_HINT_NAME_LEN_MAX 255
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char name[_CITRUS_PROP_HINT_NAME_LEN_MAX + 1];
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const _citrus_prop_hint_t *hint;
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_citrus_prop_object_t ostart, oend;
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errnum = _citrus_prop_read_symbol(ms, name, sizeof(name));
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if (errnum != 0)
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return (errnum);
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for (hint = hints; hint->name != NULL; ++hint)
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if (_citrus_bcs_strcasecmp(name, hint->name) == 0)
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goto hint_found;
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return (EINVAL);
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hint_found:
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_memstream_skip_ws(ms);
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ch = _memstream_getc(ms);
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if (ch != '=' && ch != ':')
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_memstream_ungetc(ms, ch);
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do {
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_citrus_prop_object_init(&ostart, hint->type);
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_citrus_prop_object_init(&oend, hint->type);
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errnum = (*readers[hint->type])(ms, &ostart);
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if (errnum != 0)
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return (errnum);
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_memstream_skip_ws(ms);
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ch = _memstream_getc(ms);
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switch (hint->type) {
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case _CITRUS_PROP_BOOL:
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/*FALLTHROUGH*/
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case _CITRUS_PROP_STR:
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break;
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default:
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if (ch != '-')
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break;
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errnum = (*readers[hint->type])(ms, &oend);
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if (errnum != 0)
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return (errnum);
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_memstream_skip_ws(ms);
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ch = _memstream_getc(ms);
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}
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#define CALL0(_func_) \
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do { \
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errnum = (*hint->cb._func_.func)(context, \
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hint->name, ostart.u._func_); \
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} while (0)
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#define CALL1(_func_) \
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do { \
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errnum = (*hint->cb._func_.func)(context, \
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hint->name, ostart.u._func_, oend.u._func_);\
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} while (0)
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switch (hint->type) {
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case _CITRUS_PROP_BOOL:
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CALL0(boolean);
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break;
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case _CITRUS_PROP_STR:
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CALL0(str);
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break;
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case _CITRUS_PROP_CHR:
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CALL1(chr);
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break;
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case _CITRUS_PROP_NUM:
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CALL1(num);
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break;
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default:
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abort();
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/*NOTREACHED*/
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}
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#undef CALL0
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#undef CALL1
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_citrus_prop_object_uninit(&ostart);
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_citrus_prop_object_uninit(&oend);
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if (errnum != 0)
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return (errnum);
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} while (ch == ',');
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if (ch != ';')
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_memstream_ungetc(ms, ch);
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return (0);
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}
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int
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_citrus_prop_parse_variable(const _citrus_prop_hint_t * __restrict hints,
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void * __restrict context, const void *var, size_t lenvar)
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{
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struct _memstream ms;
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int ch, errnum;
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_memstream_bind_ptr(&ms, __DECONST(void *, var), lenvar);
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for (;;) {
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_memstream_skip_ws(&ms);
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ch = _memstream_getc(&ms);
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if (ch == EOF || ch == '\0')
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break;
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_memstream_ungetc(&ms, ch);
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errnum = _citrus_prop_parse_element(&ms, hints, context);
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if (errnum != 0)
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return (errnum);
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}
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return (0);
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}
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