2 /* $NetBSD: citrus_mapper_zone.c,v 1.4 2003/07/12 15:39:21 tshiozak Exp $ */
5 * Copyright (c)2003 Citrus Project,
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <sys/cdefs.h>
31 #include <sys/queue.h>
39 #include "citrus_namespace.h"
40 #include "citrus_types.h"
41 #include "citrus_bcs.h"
42 #include "citrus_module.h"
43 #include "citrus_region.h"
44 #include "citrus_memstream.h"
45 #include "citrus_mmap.h"
46 #include "citrus_hash.h"
47 #include "citrus_mapper.h"
48 #include "citrus_mapper_zone.h"
50 /* ---------------------------------------------------------------------- */
52 _CITRUS_MAPPER_DECLS(mapper_zone);
53 _CITRUS_MAPPER_DEF_OPS(mapper_zone);
56 /* ---------------------------------------------------------------------- */
63 struct _citrus_mapper_zone {
66 int32_t mz_col_offset;
67 int32_t mz_row_offset;
72 enum { S_BEGIN, S_OFFSET } ps_state;
78 #define ps_u_imm u.u_imm
79 #define ps_s_imm u.s_imm
80 #define ps_zone u.zone
85 _citrus_mapper_zone_mapper_getops(struct _citrus_mapper_ops *ops)
88 memcpy(ops, &_citrus_mapper_zone_mapper_ops,
89 sizeof(_citrus_mapper_zone_mapper_ops));
99 get_imm(struct _memstream *ms, struct _parse_state *ps)
102 char buf[BUFSIZE + 1];
105 for (i = 0; i < BUFSIZE; i++) {
107 c = _memstream_peek(ms);
109 if (sign == 0 && (c == '+' || c == '-')) {
113 } else if (!_bcs_isdigit(c))
115 } else if (!_bcs_isxdigit(c))
116 if (!(i == 1 && c == 'x'))
118 buf[i] = _memstream_getc(ms);
121 ps->ps_u_imm = strtoul(buf, &p, 0);
125 ps->ps_u_imm = (unsigned long)-(long)ps->ps_u_imm;
130 get_tok(struct _memstream *ms, struct _parse_state *ps)
135 c = _memstream_peek(ms);
138 if (_bcs_isspace(c)) {
143 switch (ps->ps_state) {
161 return (get_imm(ms, ps));
181 return (get_imm(ms, ps));
189 parse_zone(struct _memstream *ms, struct _parse_state *ps, struct _zone *z)
192 if (get_tok(ms, ps) != T_IMM)
194 z->z_begin = ps->ps_u_imm;
195 if (get_tok(ms, ps) != '-')
197 if (get_tok(ms, ps) != T_IMM)
199 z->z_end = ps->ps_u_imm;
201 if (z->z_begin > z->z_end)
208 check_rowcol(struct _zone *z, int32_t ofs, uint32_t maxval)
212 if (maxval != 0 && z->z_end >= maxval)
217 /* this should 0x100000000 - z->z_end */
218 remain = (z->z_end == 0) ? 0xFFFFFFFF :
219 0xFFFFFFFF - z->z_end + 1;
221 remain = maxval - z->z_end;
222 if ((uint32_t)ofs > remain)
224 } else if (ofs < 0) {
225 if (z->z_begin < (uint32_t)-ofs)
233 parse_var(struct _citrus_mapper_zone *mz, struct _memstream *ms)
235 struct _parse_state ps;
236 uint32_t colmax, rowmax;
239 ps.ps_state = S_BEGIN;
241 if (parse_zone(ms, &ps, &mz->mz_col))
244 ret = get_tok(ms, &ps);
246 /* rowzone / colzone / bits */
248 mz->mz_row = mz->mz_col;
250 if (parse_zone(ms, &ps, &mz->mz_col))
252 if (get_tok(ms, &ps) != '/')
254 if (get_tok(ms, &ps) != T_IMM)
256 mz->mz_col_bits = ps.ps_u_imm;
257 if (mz->mz_col_bits < 0 || mz->mz_col_bits > 32)
259 ret = get_tok(ms, &ps);
263 mz->mz_col_bits = 32;
264 mz->mz_row.z_begin = mz->mz_row.z_end = 0;
268 ps.ps_state = S_OFFSET;
269 if (get_tok(ms, &ps) != T_IMM)
271 mz->mz_col_offset = ps.ps_s_imm;
274 mz->mz_row_offset = mz->mz_col_offset;
275 if (get_tok(ms, &ps) != '/')
277 if (get_tok(ms, &ps) != T_IMM)
279 mz->mz_col_offset = ps.ps_s_imm;
281 mz->mz_row_offset = 0;
282 ret = get_tok(ms, &ps);
288 colmax = (mz->mz_col_bits == 32) ? 0 : 1 << mz->mz_col_bits;
289 rowmax = (mz->mz_col_bits == 0) ? 0 : 1 << (32-mz->mz_col_bits);
290 if (check_rowcol(&mz->mz_col, mz->mz_col_offset, colmax))
292 if (check_rowcol(&mz->mz_row, mz->mz_row_offset, rowmax))
300 _citrus_mapper_zone_mapper_init(struct _citrus_mapper_area *__restrict ma __unused,
301 struct _citrus_mapper * __restrict cm, const char * __restrict dir __unused,
302 const void * __restrict var, size_t lenvar,
303 struct _citrus_mapper_traits * __restrict mt, size_t lenmt)
305 struct _citrus_mapper_zone *mz;
306 struct _memstream ms;
309 if (lenmt < sizeof(*mt))
312 mz = malloc(sizeof(*mz));
316 mz->mz_col.z_begin = mz->mz_col.z_end = 0;
317 mz->mz_row.z_begin = mz->mz_row.z_end = 0;
319 mz->mz_row_offset = 0;
320 mz->mz_col_offset = 0;
322 _region_init(&r, __DECONST(void *, var), lenvar);
323 _memstream_bind(&ms, &r);
324 if (parse_var(mz, &ms)) {
329 mt->mt_src_max = mt->mt_dst_max = 1; /* 1:1 converter */
330 mt->mt_state_size = 0; /* stateless */
337 _citrus_mapper_zone_mapper_uninit(struct _citrus_mapper *cm __unused)
344 _citrus_mapper_zone_mapper_convert(struct _citrus_mapper * __restrict cm,
345 _citrus_index_t * __restrict dst, _citrus_index_t src,
346 void * __restrict ps __unused)
348 struct _citrus_mapper_zone *mz = cm->cm_closure;
351 if (mz->mz_col_bits == 32) {
354 if (col < mz->mz_col.z_begin || col > mz->mz_col.z_end)
355 return (_CITRUS_MAPPER_CONVERT_NONIDENTICAL);
356 if (mz->mz_col_offset > 0)
357 col += (uint32_t)mz->mz_col_offset;
359 col -= (uint32_t)-mz->mz_col_offset;
362 col = src & (((uint32_t)1 << mz->mz_col_bits) - 1);
363 row = src >> mz->mz_col_bits;
364 if (row < mz->mz_row.z_begin || row > mz->mz_row.z_end ||
365 col < mz->mz_col.z_begin || col > mz->mz_col.z_end)
366 return (_CITRUS_MAPPER_CONVERT_NONIDENTICAL);
367 if (mz->mz_col_offset > 0)
368 col += (uint32_t)mz->mz_col_offset;
370 col -= (uint32_t)-mz->mz_col_offset;
371 if (mz->mz_row_offset > 0)
372 row += (uint32_t)mz->mz_row_offset;
374 row -= (uint32_t)-mz->mz_row_offset;
375 *dst = col | (row << mz->mz_col_bits);
377 return (_CITRUS_MAPPER_CONVERT_SUCCESS);
382 _citrus_mapper_zone_mapper_init_state(void)