minix/lib/libc/citrus/citrus_db_factory.c
Ben Gras 2fe8fb192f Full switch to clang/ELF. Drop ack. Simplify.
There is important information about booting non-ack images in
docs/UPDATING. ack/aout-format images can't be built any more, and
booting clang/ELF-format ones is a little different. Updating to the
new boot monitor is recommended.

Changes in this commit:

	. drop boot monitor -> allowing dropping ack support
	. facility to copy ELF boot files to /boot so that old boot monitor
	  can still boot fairly easily, see UPDATING
	. no more ack-format libraries -> single-case libraries
	. some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases
	. drop several ack toolchain commands, but not all support
	  commands (e.g. aal is gone but acksize is not yet).
	. a few libc files moved to netbsd libc dir
	. new /bin/date as minix date used code in libc/
	. test compile fix
	. harmonize includes
	. /usr/lib is no longer special: without ack, /usr/lib plays no
	  kind of special bootstrapping role any more and bootstrapping
	  is done exclusively through packages, so releases depend even
	  less on the state of the machine making them now.
	. rename nbsd_lib* to lib*
	. reduce mtree
2012-02-14 14:52:02 +01:00

353 lines
8.6 KiB
C

/* $NetBSD: citrus_db_factory.c,v 1.9 2008/02/09 14:56:20 junyoung 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.
*/
#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: citrus_db_factory.c,v 1.9 2008/02/09 14:56:20 junyoung Exp $");
#endif /* LIBC_SCCS and not lint */
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <sys/queue.h>
#include "citrus_namespace.h"
#include "citrus_region.h"
#include "citrus_db_file.h"
#include "citrus_db_factory.h"
struct _citrus_db_factory_entry {
SIMPLEQ_ENTRY(_citrus_db_factory_entry) de_entry;
struct _citrus_db_factory_entry *de_next;
uint32_t de_hashvalue;
struct _region de_key;
int de_key_free;
struct _region de_data;
int de_data_free;
int de_idx;
};
struct _citrus_db_factory {
size_t df_num_entries;
SIMPLEQ_HEAD(, _citrus_db_factory_entry) df_entries;
size_t df_total_key_size;
size_t df_total_data_size;
uint32_t (*df_hashfunc)(void *, struct _citrus_region *);
void *df_hashfunc_closure;
};
#define DB_ALIGN 16
int
_citrus_db_factory_create(struct _citrus_db_factory **rdf,
_citrus_db_hash_func_t hashfunc,
void *hashfunc_closure)
{
struct _citrus_db_factory *df;
df = malloc(sizeof(*df));
if (df == NULL)
return errno;
df->df_num_entries = 0;
df->df_total_key_size = df->df_total_data_size = 0;
SIMPLEQ_INIT(&df->df_entries);
df->df_hashfunc = hashfunc;
df->df_hashfunc_closure = hashfunc_closure;
*rdf = df;
return 0;
}
void
_citrus_db_factory_free(struct _citrus_db_factory *df)
{
struct _citrus_db_factory_entry *de;
while ((de = SIMPLEQ_FIRST(&df->df_entries)) != NULL) {
SIMPLEQ_REMOVE_HEAD(&df->df_entries, de_entry);
if (de->de_key_free)
free(_region_head(&de->de_key));
if (de->de_data_free)
free(_region_head(&de->de_data));
free(de);
}
free(df);
}
static __inline size_t
ceilto(size_t sz)
{
return (sz+DB_ALIGN-1) & ~(DB_ALIGN-1);
}
int
_citrus_db_factory_add(struct _citrus_db_factory *df,
struct _region *key, int keyfree,
struct _region *data, int datafree)
{
struct _citrus_db_factory_entry *de;
de = malloc(sizeof(*de));
if (de == NULL)
return -1;
de->de_hashvalue = df->df_hashfunc(df->df_hashfunc_closure, key);
de->de_key = *key;
de->de_key_free = keyfree;
de->de_data = *data;
de->de_data_free = datafree;
de->de_idx = -1;
SIMPLEQ_INSERT_TAIL(&df->df_entries, de, de_entry);
df->df_total_key_size += _region_size(key);
df->df_total_data_size += ceilto(_region_size(data));
df->df_num_entries++;
return 0;
}
int
_citrus_db_factory_add_by_string(struct _citrus_db_factory *df,
const char *key,
struct _citrus_region *data, int datafree)
{
struct _region r;
char *tmp;
tmp = strdup(key);
if (tmp == NULL)
return errno;
_region_init(&r, tmp, strlen(key));
return _citrus_db_factory_add(df, &r, 1, data, datafree);
}
int
_citrus_db_factory_add8_by_string(struct _citrus_db_factory *df,
const char *key, uint8_t val)
{
struct _region r;
uint8_t *p;
p = malloc(sizeof(*p));
if (p == NULL)
return errno;
*p = val;
_region_init(&r, p, 1);
return _citrus_db_factory_add_by_string(df, key, &r, 1);
}
int
_citrus_db_factory_add16_by_string(struct _citrus_db_factory *df,
const char *key, uint16_t val)
{
struct _region r;
uint16_t *p;
p = malloc(sizeof(*p));
if (p == NULL)
return errno;
*p = htons(val);
_region_init(&r, p, 2);
return _citrus_db_factory_add_by_string(df, key, &r, 1);
}
int
_citrus_db_factory_add32_by_string(struct _citrus_db_factory *df,
const char *key, uint32_t val)
{
struct _region r;
uint32_t *p;
p = malloc(sizeof(*p));
if (p == NULL)
return errno;
*p = htonl(val);
_region_init(&r, p, 4);
return _citrus_db_factory_add_by_string(df, key, &r, 1);
}
int
_citrus_db_factory_add_string_by_string(struct _citrus_db_factory *df,
const char *key, const char *data)
{
char *p;
struct _region r;
p = strdup(data);
if (p == NULL)
return errno;
_region_init(&r, p, strlen(p)+1);
return _citrus_db_factory_add_by_string(df, key, &r, 1);
}
size_t
_citrus_db_factory_calc_size(struct _citrus_db_factory *df)
{
size_t sz;
sz = ceilto(_CITRUS_DB_HEADER_SIZE);
sz += ceilto(_CITRUS_DB_ENTRY_SIZE * df->df_num_entries);
sz += ceilto(df->df_total_key_size);
sz += df->df_total_data_size;
return sz;
}
static __inline void
put8(struct _region *r, size_t *rofs, uint8_t val)
{
*(uint8_t *)_region_offset(r, *rofs) = val;
*rofs += 1;
}
static __inline void
put16(struct _region *r, size_t *rofs, uint16_t val)
{
val = htons(val);
memcpy(_region_offset(r, *rofs), &val, 2);
*rofs += 2;
}
static __inline void
put32(struct _region *r, size_t *rofs, uint32_t val)
{
val = htonl(val);
memcpy(_region_offset(r, *rofs), &val, 4);
*rofs += 4;
}
static __inline void
putpad(struct _region *r, size_t *rofs)
{
size_t i;
for (i = ceilto(*rofs) - *rofs; i > 0; i--)
put8(r, rofs, 0);
}
static __inline void
dump_header(struct _region *r, const char *magic, size_t *rofs,
size_t num_entries)
{
while (*rofs<_CITRUS_DB_MAGIC_SIZE)
put8(r, rofs, *magic++);
put32(r, rofs, num_entries);
put32(r, rofs, _CITRUS_DB_HEADER_SIZE);
}
int
_citrus_db_factory_serialize(struct _citrus_db_factory *df, const char *magic,
struct _region *r)
{
size_t i, ofs, keyofs, dataofs, nextofs;
struct _citrus_db_factory_entry *de, **depp, *det;
ofs = 0;
/* check whether more than 0 entries exist */
if (df->df_num_entries == 0) {
dump_header(r, magic, &ofs, 0);
return 0;
}
/* allocate hash table */
depp = malloc(sizeof(*depp) * df->df_num_entries);
if (depp == NULL)
return -1;
for (i = 0; i < df->df_num_entries; i++)
depp[i] = NULL;
/* step1: store the entries which are not conflicting */
SIMPLEQ_FOREACH(de, &df->df_entries, de_entry) {
de->de_hashvalue %= df->df_num_entries;
de->de_idx = -1;
de->de_next = NULL;
if (depp[de->de_hashvalue] == NULL) {
depp[de->de_hashvalue] = de;
de->de_idx = (int)de->de_hashvalue;
}
}
/* step2: resolve conflicts */
i = 0;
SIMPLEQ_FOREACH(de, &df->df_entries, de_entry) {
if (de->de_idx == -1) {
det = depp[de->de_hashvalue];
while (det->de_next != NULL)
det = det->de_next;
det->de_next = de;
while (depp[i] != NULL)
i++;
depp[i] = de;
de->de_idx = (int)i;
}
}
keyofs =
_CITRUS_DB_HEADER_SIZE +
ceilto(df->df_num_entries*_CITRUS_DB_ENTRY_SIZE);
dataofs = keyofs + ceilto(df->df_total_key_size);
/* dump header */
dump_header(r, magic, &ofs, df->df_num_entries);
/* dump entries */
for (i = 0; i < df->df_num_entries; i++) {
de = depp[i];
nextofs = 0;
if (de->de_next) {
nextofs =
_CITRUS_DB_HEADER_SIZE +
de->de_next->de_idx * _CITRUS_DB_ENTRY_SIZE;
}
put32(r, &ofs, de->de_hashvalue);
put32(r, &ofs, nextofs);
put32(r, &ofs, keyofs);
put32(r, &ofs, _region_size(&de->de_key));
put32(r, &ofs, dataofs);
put32(r, &ofs, _region_size(&de->de_data));
memcpy(_region_offset(r, keyofs),
_region_head(&de->de_key), _region_size(&de->de_key));
keyofs += _region_size(&de->de_key);
memcpy(_region_offset(r, dataofs),
_region_head(&de->de_data), _region_size(&de->de_data));
dataofs += _region_size(&de->de_data);
putpad(r, &dataofs);
}
putpad(r, &ofs);
putpad(r, &keyofs);
free(depp);
return 0;
}