402 lines
8.9 KiB
C
402 lines
8.9 KiB
C
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/* $NetBSD: citrus_mapper_zone.c,v 1.4 2003/07/12 15:39:21 tshiozak Exp $ */
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/*-
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* Copyright (c)2003 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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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: citrus_mapper_zone.c,v 1.4 2003/07/12 15:39:21 tshiozak Exp $");
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#endif /* LIBC_SCCS and not lint */
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#include <assert.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/queue.h>
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#include "citrus_namespace.h"
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#include "citrus_types.h"
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#include "citrus_bcs.h"
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#include "citrus_module.h"
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#include "citrus_region.h"
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#include "citrus_memstream.h"
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#include "citrus_mmap.h"
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#include "citrus_hash.h"
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#include "citrus_mapper.h"
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#include "citrus_mapper_zone.h"
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/* ---------------------------------------------------------------------- */
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_CITRUS_MAPPER_DECLS(mapper_zone);
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_CITRUS_MAPPER_DEF_OPS(mapper_zone);
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/* ---------------------------------------------------------------------- */
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struct _zone {
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u_int32_t z_begin;
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u_int32_t z_end;
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};
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struct _citrus_mapper_zone {
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struct _zone mz_row;
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struct _zone mz_col;
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int mz_col_bits;
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int32_t mz_row_offset;
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int32_t mz_col_offset;
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};
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struct _parse_state {
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enum { S_BEGIN, S_OFFSET } ps_state;
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union {
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u_int32_t u_imm;
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int32_t s_imm;
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struct _zone zone;
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} u;
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#define ps_u_imm u.u_imm
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#define ps_s_imm u.s_imm
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#define ps_zone u.zone
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int ps_top;
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};
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int
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_citrus_mapper_zone_mapper_getops(struct _citrus_mapper_ops *ops,
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size_t lenops, uint32_t expected_version)
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{
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if (expected_version<_CITRUS_MAPPER_ABI_VERSION || lenops<sizeof(*ops))
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return EINVAL;
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memcpy(ops, &_citrus_mapper_zone_mapper_ops,
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sizeof(_citrus_mapper_zone_mapper_ops));
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return 0;
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}
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#define BUFSIZE 20
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#define T_ERR 0x100
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#define T_IMM 0x101
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static int
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get_imm(struct _memstream *ms, struct _parse_state *ps)
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{
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int sign = 0;
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int c, i;
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char buf[BUFSIZE+1], *p;
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for (i=0; i<BUFSIZE; i++) {
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retry:
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c = _memstream_peek(ms);
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if (i==0) {
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if (sign == 0 && (c == '+' || c == '-')) {
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sign = c;
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_memstream_getc(ms);
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goto retry;
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} else if (!_bcs_isdigit(c))
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break;
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} else if (!_bcs_isxdigit(c))
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if (!(i==1 && c == 'x'))
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break;
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buf[i] = _memstream_getc(ms);
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}
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buf[i] = '\0';
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ps->ps_u_imm = strtoul(buf, &p, 0);
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if ((p-buf) != i)
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return T_ERR;
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if (sign == '-')
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ps->ps_u_imm = (unsigned long)-(long)ps->ps_u_imm;
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return T_IMM;
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}
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static int
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get_tok(struct _memstream *ms, struct _parse_state *ps)
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{
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int c;
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loop:
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c = _memstream_peek(ms);
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if (c==0x00)
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return EOF;
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if (_bcs_isspace(c)) {
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_memstream_getc(ms);
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goto loop;
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}
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switch (ps->ps_state) {
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case S_BEGIN:
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switch (c) {
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case ':':
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case '-':
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case '/':
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_memstream_getc(ms);
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return c;
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case '0':
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case '1':
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case '2':
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case '3':
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case '4':
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case '5':
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case '6':
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case '7':
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case '8':
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case '9':
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return get_imm(ms, ps);
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}
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break;
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case S_OFFSET:
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switch (c) {
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case '/':
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_memstream_getc(ms);
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return c;
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case '+':
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case '-':
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case '0':
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case '1':
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case '2':
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case '3':
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case '4':
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case '5':
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case '6':
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case '7':
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case '8':
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case '9':
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return get_imm(ms, ps);
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}
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break;
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}
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return T_ERR;
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}
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static int
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parse_zone(struct _memstream *ms, struct _parse_state *ps, struct _zone *z)
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{
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if (get_tok(ms, ps) != T_IMM)
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return -1;
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z->z_begin = ps->ps_u_imm;
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if (get_tok(ms, ps) != '-')
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return -1;
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if (get_tok(ms, ps) != T_IMM)
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return -1;
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z->z_end = ps->ps_u_imm;
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if (z->z_begin > z->z_end)
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return -1;
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return 0;
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}
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static int
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check_rowcol(struct _zone *z, int32_t ofs, uint32_t maxval)
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{
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u_int32_t remain;
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if (maxval != 0 && z->z_end >= maxval)
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return -1;
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if (ofs > 0) {
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if (maxval == 0) {
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/* this should 0x100000000 - z->z_end */
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if (z->z_end == 0) {
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remain = 0xFFFFFFFF;
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} else {
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remain = 0xFFFFFFFF - z->z_end + 1;
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}
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} else
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remain = maxval - z->z_end;
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if ((u_int32_t)ofs > remain)
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return -1;
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} else if (ofs < 0) {
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if (z->z_begin < (u_int32_t)-ofs)
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return -1;
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}
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return 0;
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}
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static int
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parse_var(struct _citrus_mapper_zone *mz, struct _memstream *ms)
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{
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struct _parse_state ps;
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int ret, isrc;
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uint32_t rowmax, colmax;
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ps.ps_state = S_BEGIN;
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if (parse_zone(ms, &ps, &mz->mz_col))
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return -1;
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ret = get_tok(ms, &ps);
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if (ret == '/') {
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/* rowzone / colzone / bits */
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isrc = 1;
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mz->mz_row = mz->mz_col;
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if (parse_zone(ms, &ps, &mz->mz_col))
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return -1;
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if (get_tok(ms, &ps) != '/')
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return -1;
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if (get_tok(ms, &ps) != T_IMM)
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return -1;
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mz->mz_col_bits = ps.ps_u_imm;
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if (mz->mz_col_bits<0 || mz->mz_col_bits>32)
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return -1;
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ret = get_tok(ms, &ps);
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} else {
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/* colzone */
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isrc = 0;
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mz->mz_col_bits = 32;
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mz->mz_row.z_begin = mz->mz_row.z_end = 0;
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}
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if (ret == ':') {
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/* offset */
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ps.ps_state = S_OFFSET;
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if (get_tok(ms, &ps) != T_IMM)
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return -1;
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mz->mz_col_offset = ps.ps_s_imm;
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if (isrc) {
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/* row/col */
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mz->mz_row_offset = mz->mz_col_offset;
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if (get_tok(ms, &ps) != '/')
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return -1;
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if (get_tok(ms, &ps) != T_IMM)
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return -1;
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mz->mz_col_offset = ps.ps_s_imm;
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} else
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mz->mz_row_offset = 0;
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ret = get_tok(ms, &ps);
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}
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if (ret != EOF)
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return -1;
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/* sanity check */
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if (mz->mz_col_bits==32)
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colmax = 0;
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else
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colmax = 1 << mz->mz_col_bits;
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if (mz->mz_col_bits==0)
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rowmax = 0;
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else
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rowmax = 1 << (32-mz->mz_col_bits);
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if (check_rowcol(&mz->mz_col, mz->mz_col_offset, colmax))
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return -1;
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if (check_rowcol(&mz->mz_row, mz->mz_row_offset, rowmax))
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return -1;
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return 0;
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}
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static int
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/*ARGSUSED*/
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_citrus_mapper_zone_mapper_init(struct _citrus_mapper_area *__restrict ma,
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struct _citrus_mapper * __restrict cm,
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const char * __restrict dir,
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const void * __restrict var, size_t lenvar,
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struct _citrus_mapper_traits * __restrict mt,
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size_t lenmt)
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{
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struct _citrus_mapper_zone *mz;
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struct _memstream ms;
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struct _region r;
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_DIAGASSERT(cm && dir && mt);
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if (lenmt<sizeof(*mt))
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return EINVAL;
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mz = malloc(sizeof(*mz));
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if (mz == NULL)
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return errno;
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mz->mz_col.z_begin = mz->mz_col.z_end = 0;
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mz->mz_row.z_begin = mz->mz_row.z_end = 0;
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mz->mz_col_bits = 0;
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mz->mz_row_offset = 0;
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mz->mz_col_offset = 0;
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_region_init(&r, (void *)var, lenvar);
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_memstream_bind(&ms, &r);
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if (parse_var(mz, &ms)) {
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free(mz);
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return EINVAL;
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}
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cm->cm_closure = mz;
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mt->mt_src_max = mt->mt_dst_max = 1; /* 1:1 converter */
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mt->mt_state_size = 0; /* stateless */
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return 0;
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}
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static void
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/*ARGSUSED*/
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_citrus_mapper_zone_mapper_uninit(struct _citrus_mapper *cm)
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{
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}
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static int
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/*ARGSUSED*/
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_citrus_mapper_zone_mapper_convert(struct _citrus_mapper * __restrict cm,
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_citrus_index_t * __restrict dst,
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_citrus_index_t src, void * __restrict ps)
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{
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u_int32_t row, col;
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struct _citrus_mapper_zone *mz = cm->cm_closure;
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if (mz->mz_col_bits == 32) {
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col = src;
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row = 0;
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if (col < mz->mz_col.z_begin || col > mz->mz_col.z_end)
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return _CITRUS_MAPPER_CONVERT_NONIDENTICAL;
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if (mz->mz_col_offset>0)
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col += (u_int32_t)mz->mz_col_offset;
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else
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col -= (u_int32_t)-mz->mz_col_offset;
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*dst = col;
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} else {
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col = src & (((u_int32_t)1<<mz->mz_col_bits)-1);
|
||
|
|
row = src >> mz->mz_col_bits;
|
||
|
|
if (row < mz->mz_row.z_begin || row > mz->mz_row.z_end ||
|
||
|
|
col < mz->mz_col.z_begin || col > mz->mz_col.z_end)
|
||
|
|
return _CITRUS_MAPPER_CONVERT_NONIDENTICAL;
|
||
|
|
if (mz->mz_col_offset>0)
|
||
|
|
col += (u_int32_t)mz->mz_col_offset;
|
||
|
|
else
|
||
|
|
col -= (u_int32_t)-mz->mz_col_offset;
|
||
|
|
if (mz->mz_row_offset>0)
|
||
|
|
row += (u_int32_t)mz->mz_row_offset;
|
||
|
|
else
|
||
|
|
row -= (u_int32_t)-mz->mz_row_offset;
|
||
|
|
*dst = col | (row << mz->mz_col_bits);
|
||
|
|
}
|
||
|
|
return _CITRUS_MAPPER_CONVERT_SUCCESS;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
/*ARGSUSED*/
|
||
|
|
_citrus_mapper_zone_mapper_init_state(struct _citrus_mapper * __restrict cm,
|
||
|
|
void * __restrict ps)
|
||
|
|
{
|
||
|
|
}
|