static int check_ptr(const char *where, byte *ptr, const char *sFile,
uint uLine)
{
if (!ptr)
{
fprintf (stderr, "%s NULL pointer at line %d, '%s'\n",
where,uLine, sFile);
DBUG_PRINT("safe",("Null pointer at line %d '%s'", uLine, sFile));
(void) fflush(stderr);
return 1;
}
#ifndef _MSC_VER
if ((long) ptr & (MY_ALIGN(1,sizeof(char *))-1))
{
fprintf (stderr, "%s wrong aligned pointer at line %d, '%s'\n",
where,uLine, sFile);
DBUG_PRINT("safe",("Wrong aligned pointer at line %d, '%s'",
uLine,sFile));
(void) fflush(stderr);
return 1;
}
#endif
if (ptr < sf_min_adress || ptr > sf_max_adress)
{
fprintf (stderr, "%s pointer out of range at line %d, '%s'\n",
where,uLine, sFile);
DBUG_PRINT("safe",("Pointer out of range at line %d '%s'",
uLine,sFile));
(void) fflush(stderr);
return 1;
}
return 0;
}
static Bigint *Balloc(int k, Stack_alloc *alloc)
{
Bigint *rv;
DBUG_ASSERT(k <= Kmax);
if (k <= Kmax && alloc->freelist[k])
{
rv= alloc->freelist[k];
alloc->freelist[k]= rv->p.next;
}
else
{
int x, len;
x= 1 << k;
len= MY_ALIGN(sizeof(Bigint) + x * sizeof(ULong), SIZEOF_CHARP);
if (alloc->free + len <= alloc->end)
{
rv= (Bigint*) alloc->free;
alloc->free+= len;
}
else
rv= (Bigint*) malloc(len);
rv->k= k;
rv->maxwds= x;
}
rv->sign= rv->wds= 0;
rv->p.x= (ULong*) (rv + 1);
return rv;
}
static char *dtoa_alloc(int i, Stack_alloc *alloc)
{
char *rv;
int aligned_size= MY_ALIGN(i, SIZEOF_CHARP);
if (alloc->free + aligned_size <= alloc->end)
{
rv= alloc->free;
alloc->free+= aligned_size;
}
else
rv= malloc(i);
return rv;
}
void init_tree(TREE *tree, ulong default_alloc_size, ulong memory_limit,
int size, qsort_cmp2 compare, my_bool with_delete,
tree_element_free free_element, const void *custom_arg)
{
DBUG_ENTER("init_tree");
DBUG_PRINT("enter",("tree: 0x%lx size: %d", (long) tree, size));
if (default_alloc_size < DEFAULT_ALLOC_SIZE)
default_alloc_size= DEFAULT_ALLOC_SIZE;
default_alloc_size= MY_ALIGN(default_alloc_size, DEFAULT_ALIGN_SIZE);
memset(&tree->null_element, 0, sizeof(tree->null_element));
tree->root= &tree->null_element;
tree->compare=compare;
tree->size_of_element=size > 0 ? (uint) size : 0;
tree->memory_limit=memory_limit;
tree->free=free_element;
tree->allocated=0;
tree->elements_in_tree=0;
tree->custom_arg = custom_arg;
tree->null_element.colour=BLACK;
tree->null_element.left=tree->null_element.right=0;
tree->flag= 0;
if (!free_element && size >= 0 &&
((uint) size <= sizeof(void*) || ((uint) size & (sizeof(void*)-1))))
{
/*
We know that the data doesn't have to be aligned (like if the key
contains a double), so we can store the data combined with the
TREE_ELEMENT.
*/
tree->offset_to_key=sizeof(TREE_ELEMENT); /* Put key after element */
/* Fix allocation size so that we don't lose any memory */
default_alloc_size/=(sizeof(TREE_ELEMENT)+size);
if (!default_alloc_size)
default_alloc_size=1;
default_alloc_size*=(sizeof(TREE_ELEMENT)+size);
}
else
{
tree->offset_to_key=0; /* use key through pointer */
tree->size_of_element+=sizeof(void*);
}
if (!(tree->with_delete=with_delete))
{
init_alloc_root(key_memory_TREE,
&tree->mem_root, (uint) default_alloc_size, 0);
tree->mem_root.min_malloc=(sizeof(TREE_ELEMENT)+tree->size_of_element);
}
DBUG_VOID_RETURN;
}
uchar* my_large_malloc_int(size_t size, myf my_flags)
{
int shmid;
uchar* ptr;
struct shmid_ds buf;
DBUG_ENTER("my_large_malloc_int");
/* Align block size to my_large_page_size */
size= MY_ALIGN(size, (size_t) my_large_page_size);
shmid = shmget(IPC_PRIVATE, size, SHM_HUGETLB | SHM_R | SHM_W);
if (shmid < 0)
{
if (my_flags & MY_WME)
/* purecov: begin inspected */
my_message_local(WARNING_LEVEL,
"Failed to allocate %lu bytes from HugeTLB memory."
" errno %d", (ulong) size, errno);
/* purecov: end */
DBUG_RETURN(NULL);
}
ptr = (uchar*) shmat(shmid, NULL, 0);
if (ptr == (uchar *) -1)
{
if (my_flags& MY_WME)
/* purecov: begin inspected */
my_message_local(WARNING_LEVEL, "Failed to attach shared memory segment,"
" errno %d", errno);
/* purecov: end */
shmctl(shmid, IPC_RMID, &buf);
DBUG_RETURN(NULL);
}
/*
Remove the shared memory segment so that it will be automatically freed
after memory is detached or process exits
*/
shmctl(shmid, IPC_RMID, &buf);
DBUG_RETURN(ptr);
}
int mi_create(const char *name,uint keys,MI_KEYDEF *keydefs,
uint columns, MI_COLUMNDEF *recinfo,
uint uniques, MI_UNIQUEDEF *uniquedefs,
MI_CREATE_INFO *ci,uint flags)
{
register uint i,j;
File UNINIT_VAR(dfile), UNINIT_VAR(file);
int errpos,save_errno, create_mode= O_RDWR | O_TRUNC;
myf create_flag;
uint fields,length,max_key_length,packed,pointer,real_length_diff,
key_length,info_length,key_segs,options,min_key_length_skip,
base_pos,long_varchar_count,varchar_length,
max_key_block_length,unique_key_parts,fulltext_keys,offset;
uint aligned_key_start, block_length;
uint internal_table= flags & HA_CREATE_INTERNAL_TABLE;
ulong reclength, real_reclength,min_pack_length;
char filename[FN_REFLEN],linkname[FN_REFLEN], *linkname_ptr;
ulong pack_reclength;
ulonglong tot_length,max_rows, tmp;
enum en_fieldtype type;
MYISAM_SHARE share;
MI_KEYDEF *keydef,tmp_keydef;
MI_UNIQUEDEF *uniquedef;
HA_KEYSEG *keyseg,tmp_keyseg;
MI_COLUMNDEF *rec;
ulong *rec_per_key_part;
my_off_t key_root[HA_MAX_POSSIBLE_KEY],key_del[MI_MAX_KEY_BLOCK_SIZE];
MI_CREATE_INFO tmp_create_info;
DBUG_ENTER("mi_create");
DBUG_PRINT("enter", ("keys: %u columns: %u uniques: %u flags: %u",
keys, columns, uniques, flags));
if (!ci)
{
memset(&tmp_create_info, 0, sizeof(tmp_create_info));
ci=&tmp_create_info;
}
if (keys + uniques > MI_MAX_KEY || columns == 0)
{
DBUG_RETURN(my_errno=HA_WRONG_CREATE_OPTION);
}
errpos=0;
options=0;
memset(&share, 0, sizeof(share));
if (flags & HA_DONT_TOUCH_DATA)
{
if (!(ci->old_options & HA_OPTION_TEMP_COMPRESS_RECORD))
options=ci->old_options &
(HA_OPTION_COMPRESS_RECORD | HA_OPTION_PACK_RECORD |
HA_OPTION_READ_ONLY_DATA | HA_OPTION_CHECKSUM |
HA_OPTION_TMP_TABLE | HA_OPTION_DELAY_KEY_WRITE);
else
options=ci->old_options &
(HA_OPTION_CHECKSUM | HA_OPTION_TMP_TABLE | HA_OPTION_DELAY_KEY_WRITE);
}
if (ci->reloc_rows > ci->max_rows)
ci->reloc_rows=ci->max_rows; /* Check if wrong parameter */
if (!(rec_per_key_part=
(ulong*) my_malloc((keys + uniques)*MI_MAX_KEY_SEG*sizeof(long),
MYF(MY_WME | MY_ZEROFILL))))
DBUG_RETURN(my_errno);
/* Start by checking fields and field-types used */
reclength=varchar_length=long_varchar_count=packed=
min_pack_length=pack_reclength=0;
for (rec=recinfo, fields=0 ;
fields != columns ;
rec++,fields++)
{
reclength+=rec->length;
if ((type=(enum en_fieldtype) rec->type) != FIELD_NORMAL &&
type != FIELD_CHECK)
{
packed++;
if (type == FIELD_BLOB)
{
share.base.blobs++;
if (pack_reclength != INT_MAX32)
{
if (rec->length == 4+portable_sizeof_char_ptr)
pack_reclength= INT_MAX32;
else
pack_reclength+=(1 << ((rec->length-portable_sizeof_char_ptr)*8)); /* Max blob length */
}
}
else if (type == FIELD_SKIP_PRESPACE ||
type == FIELD_SKIP_ENDSPACE)
{
if (pack_reclength != INT_MAX32)
pack_reclength+= rec->length > 255 ? 2 : 1;
min_pack_length++;
}
else if (type == FIELD_VARCHAR)
{
varchar_length+= rec->length-1; /* Used for min_pack_length */
packed--;
pack_reclength++;
min_pack_length++;
/* We must test for 257 as length includes pack-length */
if (test(rec->length >= 257))
{
long_varchar_count++;
pack_reclength+= 2; /* May be packed on 3 bytes */
}
}
else if (type != FIELD_SKIP_ZERO)
{
min_pack_length+=rec->length;
packed--; /* Not a pack record type */
}
}
else /* FIELD_NORMAL */
min_pack_length+=rec->length;
}
if ((packed & 7) == 1)
{ /* Bad packing, try to remove a zero-field */
while (rec != recinfo)
{
rec--;
if (rec->type == (int) FIELD_SKIP_ZERO && rec->length == 1)
{
/*
NOTE1: here we change a field type FIELD_SKIP_ZERO ->
FIELD_NORMAL
*/
rec->type=(int) FIELD_NORMAL;
packed--;
min_pack_length++;
break;
}
}
}
if (packed || (flags & HA_PACK_RECORD))
options|=HA_OPTION_PACK_RECORD; /* Must use packed records */
/* We can't use checksum with static length rows */
if (!(options & HA_OPTION_PACK_RECORD))
options&= ~HA_OPTION_CHECKSUM;
if (!(options & (HA_OPTION_PACK_RECORD | HA_OPTION_COMPRESS_RECORD)))
min_pack_length+= varchar_length;
if (flags & HA_CREATE_TMP_TABLE)
{
options|= HA_OPTION_TMP_TABLE;
create_mode|= O_EXCL | O_NOFOLLOW;
}
if (flags & HA_CREATE_CHECKSUM || (options & HA_OPTION_CHECKSUM))
{
options|= HA_OPTION_CHECKSUM;
min_pack_length++;
}
if (flags & HA_CREATE_DELAY_KEY_WRITE)
options|= HA_OPTION_DELAY_KEY_WRITE;
if (flags & HA_CREATE_RELIES_ON_SQL_LAYER)
options|= HA_OPTION_RELIES_ON_SQL_LAYER;
packed=(packed+7)/8;
if (pack_reclength != INT_MAX32)
pack_reclength+= reclength+packed +
test(test_all_bits(options, HA_OPTION_CHECKSUM | HA_OPTION_PACK_RECORD));
min_pack_length+=packed;
if (!ci->data_file_length && ci->max_rows)
{
if (pack_reclength == INT_MAX32 ||
(~(ulonglong) 0)/ci->max_rows < (ulonglong) pack_reclength)
ci->data_file_length= ~(ulonglong) 0;
else
ci->data_file_length=(ulonglong) ci->max_rows*pack_reclength;
}
else if (!ci->max_rows)
ci->max_rows=(ha_rows) (ci->data_file_length/(min_pack_length +
((options & HA_OPTION_PACK_RECORD) ?
3 : 0)));
if (options & (HA_OPTION_COMPRESS_RECORD | HA_OPTION_PACK_RECORD))
pointer=mi_get_pointer_length(ci->data_file_length,myisam_data_pointer_size);
else
pointer=mi_get_pointer_length(ci->max_rows,myisam_data_pointer_size);
if (!(max_rows=(ulonglong) ci->max_rows))
max_rows= ((((ulonglong) 1 << (pointer*8)) -1) / min_pack_length);
real_reclength=reclength;
if (!(options & (HA_OPTION_COMPRESS_RECORD | HA_OPTION_PACK_RECORD)))
{
if (reclength <= pointer)
reclength=pointer+1; /* reserve place for delete link */
}
else
reclength+= long_varchar_count; /* We need space for varchar! */
max_key_length=0; tot_length=0 ; key_segs=0;
fulltext_keys=0;
max_key_block_length=0;
share.state.rec_per_key_part=rec_per_key_part;
share.state.key_root=key_root;
share.state.key_del=key_del;
if (uniques)
{
max_key_block_length= myisam_block_size;
max_key_length= MI_UNIQUE_HASH_LENGTH + pointer;
}
for (i=0, keydef=keydefs ; i < keys ; i++ , keydef++)
{
share.state.key_root[i]= HA_OFFSET_ERROR;
min_key_length_skip=length=real_length_diff=0;
key_length=pointer;
if (keydef->flag & HA_SPATIAL)
{
#ifdef HAVE_SPATIAL
/* BAR TODO to support 3D and more dimensions in the future */
uint sp_segs=SPDIMS*2;
keydef->flag=HA_SPATIAL;
if (flags & HA_DONT_TOUCH_DATA)
{
/*
called by myisamchk - i.e. table structure was taken from
MYI file and SPATIAL key *does have* additional sp_segs keysegs.
keydef->seg here points right at the GEOMETRY segment,
so we only need to decrease keydef->keysegs.
(see recreate_table() in mi_check.c)
*/
keydef->keysegs-=sp_segs-1;
}
for (j=0, keyseg=keydef->seg ; (int) j < keydef->keysegs ;
j++, keyseg++)
{
if (keyseg->type != HA_KEYTYPE_BINARY &&
keyseg->type != HA_KEYTYPE_VARBINARY1 &&
keyseg->type != HA_KEYTYPE_VARBINARY2)
{
my_errno=HA_WRONG_CREATE_OPTION;
goto err_no_lock;
}
}
keydef->keysegs+=sp_segs;
key_length+=SPLEN*sp_segs;
length++; /* At least one length byte */
min_key_length_skip+=SPLEN*2*SPDIMS;
#else
my_errno= HA_ERR_UNSUPPORTED;
goto err_no_lock;
#endif /*HAVE_SPATIAL*/
}
else if (keydef->flag & HA_FULLTEXT)
{
keydef->flag=HA_FULLTEXT | HA_PACK_KEY | HA_VAR_LENGTH_KEY;
options|=HA_OPTION_PACK_KEYS; /* Using packed keys */
for (j=0, keyseg=keydef->seg ; (int) j < keydef->keysegs ;
j++, keyseg++)
{
if (keyseg->type != HA_KEYTYPE_TEXT &&
keyseg->type != HA_KEYTYPE_VARTEXT1 &&
keyseg->type != HA_KEYTYPE_VARTEXT2)
{
my_errno=HA_WRONG_CREATE_OPTION;
goto err_no_lock;
}
if (!(keyseg->flag & HA_BLOB_PART) &&
(keyseg->type == HA_KEYTYPE_VARTEXT1 ||
keyseg->type == HA_KEYTYPE_VARTEXT2))
{
/* Make a flag that this is a VARCHAR */
keyseg->flag|= HA_VAR_LENGTH_PART;
/* Store in bit_start number of bytes used to pack the length */
keyseg->bit_start= ((keyseg->type == HA_KEYTYPE_VARTEXT1)?
1 : 2);
}
}
fulltext_keys++;
key_length+= HA_FT_MAXBYTELEN+HA_FT_WLEN;
length++; /* At least one length byte */
min_key_length_skip+=HA_FT_MAXBYTELEN;
real_length_diff=HA_FT_MAXBYTELEN-FT_MAX_WORD_LEN_FOR_SORT;
}
else
{
/* Test if prefix compression */
if (keydef->flag & HA_PACK_KEY)
{
/* Can't use space_compression on number keys */
if ((keydef->seg[0].flag & HA_SPACE_PACK) &&
keydef->seg[0].type == (int) HA_KEYTYPE_NUM)
keydef->seg[0].flag&= ~HA_SPACE_PACK;
/* Only use HA_PACK_KEY when first segment is a variable length key */
if (!(keydef->seg[0].flag & (HA_SPACE_PACK | HA_BLOB_PART |
HA_VAR_LENGTH_PART)))
{
/* pack relative to previous key */
keydef->flag&= ~HA_PACK_KEY;
keydef->flag|= HA_BINARY_PACK_KEY | HA_VAR_LENGTH_KEY;
}
else
{
keydef->seg[0].flag|=HA_PACK_KEY; /* for easyer intern test */
keydef->flag|=HA_VAR_LENGTH_KEY;
options|=HA_OPTION_PACK_KEYS; /* Using packed keys */
}
}
if (keydef->flag & HA_BINARY_PACK_KEY)
options|=HA_OPTION_PACK_KEYS; /* Using packed keys */
if (keydef->flag & HA_AUTO_KEY && ci->with_auto_increment)
share.base.auto_key=i+1;
for (j=0, keyseg=keydef->seg ; j < keydef->keysegs ; j++, keyseg++)
{
/* numbers are stored with high by first to make compression easier */
switch (keyseg->type) {
case HA_KEYTYPE_SHORT_INT:
case HA_KEYTYPE_LONG_INT:
case HA_KEYTYPE_FLOAT:
case HA_KEYTYPE_DOUBLE:
case HA_KEYTYPE_USHORT_INT:
case HA_KEYTYPE_ULONG_INT:
case HA_KEYTYPE_LONGLONG:
case HA_KEYTYPE_ULONGLONG:
case HA_KEYTYPE_INT24:
case HA_KEYTYPE_UINT24:
case HA_KEYTYPE_INT8:
keyseg->flag|= HA_SWAP_KEY;
break;
case HA_KEYTYPE_VARTEXT1:
case HA_KEYTYPE_VARTEXT2:
case HA_KEYTYPE_VARBINARY1:
case HA_KEYTYPE_VARBINARY2:
if (!(keyseg->flag & HA_BLOB_PART))
{
/* Make a flag that this is a VARCHAR */
keyseg->flag|= HA_VAR_LENGTH_PART;
/* Store in bit_start number of bytes used to pack the length */
keyseg->bit_start= ((keyseg->type == HA_KEYTYPE_VARTEXT1 ||
keyseg->type == HA_KEYTYPE_VARBINARY1) ?
1 : 2);
}
break;
default:
break;
}
if (keyseg->flag & HA_SPACE_PACK)
{
DBUG_ASSERT(!(keyseg->flag & HA_VAR_LENGTH_PART));
keydef->flag |= HA_SPACE_PACK_USED | HA_VAR_LENGTH_KEY;
options|=HA_OPTION_PACK_KEYS; /* Using packed keys */
length++; /* At least one length byte */
min_key_length_skip+=keyseg->length;
if (keyseg->length >= 255)
{ /* prefix may be 3 bytes */
min_key_length_skip+=2;
length+=2;
}
}
if (keyseg->flag & (HA_VAR_LENGTH_PART | HA_BLOB_PART))
{
DBUG_ASSERT(!test_all_bits(keyseg->flag,
(HA_VAR_LENGTH_PART | HA_BLOB_PART)));
keydef->flag|=HA_VAR_LENGTH_KEY;
length++; /* At least one length byte */
options|=HA_OPTION_PACK_KEYS; /* Using packed keys */
min_key_length_skip+=keyseg->length;
if (keyseg->length >= 255)
{ /* prefix may be 3 bytes */
min_key_length_skip+=2;
length+=2;
}
}
key_length+= keyseg->length;
if (keyseg->null_bit)
{
key_length++;
options|=HA_OPTION_PACK_KEYS;
keyseg->flag|=HA_NULL_PART;
keydef->flag|=HA_VAR_LENGTH_KEY | HA_NULL_PART_KEY;
}
}
} /* if HA_FULLTEXT */
key_segs+=keydef->keysegs;
if (keydef->keysegs > MI_MAX_KEY_SEG)
{
my_errno=HA_WRONG_CREATE_OPTION;
goto err_no_lock;
}
/*
key_segs may be 0 in the case when we only want to be able to
add on row into the table. This can happen with some DISTINCT queries
in MySQL
*/
if ((keydef->flag & (HA_NOSAME | HA_NULL_PART_KEY)) == HA_NOSAME &&
key_segs)
share.state.rec_per_key_part[key_segs-1]=1L;
length+=key_length;
/* Get block length for key, if defined by user */
block_length= (keydef->block_length ?
my_round_up_to_next_power(keydef->block_length) :
myisam_block_size);
block_length= MY_MAX(block_length, MI_MIN_KEY_BLOCK_LENGTH);
block_length= MY_MIN(block_length, MI_MAX_KEY_BLOCK_LENGTH);
keydef->block_length= (uint16) MI_BLOCK_SIZE(length-real_length_diff,
pointer,MI_MAX_KEYPTR_SIZE,
block_length);
if (keydef->block_length > MI_MAX_KEY_BLOCK_LENGTH ||
length >= MI_MAX_KEY_BUFF)
{
my_errno=HA_WRONG_CREATE_OPTION;
goto err_no_lock;
}
set_if_bigger(max_key_block_length,keydef->block_length);
keydef->keylength= (uint16) key_length;
keydef->minlength= (uint16) (length-min_key_length_skip);
keydef->maxlength= (uint16) length;
if (length > max_key_length)
max_key_length= length;
tot_length+= (max_rows/(ulong) (((uint) keydef->block_length-5)/
(length*2)))*
(ulong) keydef->block_length;
}
for (i=max_key_block_length/MI_MIN_KEY_BLOCK_LENGTH ; i-- ; )
key_del[i]=HA_OFFSET_ERROR;
unique_key_parts=0;
for (i=0, uniquedef=uniquedefs ; i < uniques ; i++ , uniquedef++)
{
uniquedef->key=keys+i;
unique_key_parts+=uniquedef->keysegs;
share.state.key_root[keys+i]= HA_OFFSET_ERROR;
tot_length+= (max_rows/(ulong) (((uint) myisam_block_size-5)/
((MI_UNIQUE_HASH_LENGTH + pointer)*2)))*
(ulong) myisam_block_size;
}
keys+=uniques; /* Each unique has 1 key */
key_segs+=uniques; /* Each unique has 1 key seg */
base_pos=(MI_STATE_INFO_SIZE + keys * MI_STATE_KEY_SIZE +
max_key_block_length/MI_MIN_KEY_BLOCK_LENGTH*
MI_STATE_KEYBLOCK_SIZE+
key_segs*MI_STATE_KEYSEG_SIZE);
info_length=base_pos+(uint) (MI_BASE_INFO_SIZE+
keys * MI_KEYDEF_SIZE+
uniques * MI_UNIQUEDEF_SIZE +
(key_segs + unique_key_parts)*HA_KEYSEG_SIZE+
columns*MI_COLUMNDEF_SIZE);
DBUG_PRINT("info", ("info_length: %u", info_length));
/* There are only 16 bits for the total header length. */
if (info_length > 65535)
{
my_printf_error(0, "MyISAM table '%s' has too many columns and/or "
"indexes and/or unique constraints.",
MYF(0), name + dirname_length(name));
my_errno= HA_WRONG_CREATE_OPTION;
goto err_no_lock;
}
bmove(share.state.header.file_version,(uchar*) myisam_file_magic,4);
ci->old_options=options| (ci->old_options & HA_OPTION_TEMP_COMPRESS_RECORD ?
HA_OPTION_COMPRESS_RECORD |
HA_OPTION_TEMP_COMPRESS_RECORD: 0);
mi_int2store(share.state.header.options,ci->old_options);
mi_int2store(share.state.header.header_length,info_length);
mi_int2store(share.state.header.state_info_length,MI_STATE_INFO_SIZE);
mi_int2store(share.state.header.base_info_length,MI_BASE_INFO_SIZE);
mi_int2store(share.state.header.base_pos,base_pos);
share.state.header.language= (ci->language ?
ci->language : default_charset_info->number);
share.state.header.max_block_size_index= max_key_block_length/MI_MIN_KEY_BLOCK_LENGTH;
share.state.dellink = HA_OFFSET_ERROR;
share.state.process= (ulong) getpid();
share.state.unique= (ulong) 0;
share.state.update_count=(ulong) 0;
share.state.version= (ulong) time((time_t*) 0);
share.state.sortkey= (ushort) ~0;
share.state.auto_increment=ci->auto_increment;
share.options=options;
share.base.rec_reflength=pointer;
/* Get estimate for index file length (this may be wrong for FT keys) */
tmp= (tot_length + max_key_block_length * keys *
MI_INDEX_BLOCK_MARGIN) / MI_MIN_KEY_BLOCK_LENGTH;
/*
use maximum of key_file_length we calculated and key_file_length value we
got from MYI file header (see also myisampack.c:save_state)
*/
share.base.key_reflength=
mi_get_pointer_length(MY_MAX(ci->key_file_length, tmp), 3);
share.base.keys= share.state.header.keys= keys;
share.state.header.uniques= uniques;
share.state.header.fulltext_keys= fulltext_keys;
mi_int2store(share.state.header.key_parts,key_segs);
mi_int2store(share.state.header.unique_key_parts,unique_key_parts);
mi_set_all_keys_active(share.state.key_map, keys);
aligned_key_start= my_round_up_to_next_power(max_key_block_length ?
max_key_block_length :
myisam_block_size);
share.base.keystart= share.state.state.key_file_length=
MY_ALIGN(info_length, aligned_key_start);
share.base.max_key_block_length=max_key_block_length;
share.base.max_key_length=ALIGN_SIZE(max_key_length+4);
share.base.records=ci->max_rows;
share.base.reloc= ci->reloc_rows;
share.base.reclength=real_reclength;
share.base.pack_reclength=reclength+ test(options & HA_OPTION_CHECKSUM);
share.base.max_pack_length=pack_reclength;
share.base.min_pack_length=min_pack_length;
share.base.pack_bits=packed;
share.base.fields=fields;
share.base.pack_fields=packed;
/* max_data_file_length and max_key_file_length are recalculated on open */
if (options & HA_OPTION_TMP_TABLE)
share.base.max_data_file_length=(my_off_t) ci->data_file_length;
share.base.min_block_length=
(share.base.pack_reclength+3 < MI_EXTEND_BLOCK_LENGTH &&
! share.base.blobs) ?
MY_MAX(share.base.pack_reclength, MI_MIN_BLOCK_LENGTH) :
MI_EXTEND_BLOCK_LENGTH;
if (! (flags & HA_DONT_TOUCH_DATA))
share.state.create_time= (long) time((time_t*) 0);
if (!internal_table)
mysql_mutex_lock(&THR_LOCK_myisam);
/*
NOTE: For test_if_reopen() we need a real path name. Hence we need
MY_RETURN_REAL_PATH for every fn_format(filename, ...).
*/
if (ci->index_file_name)
{
char *iext= strrchr(ci->index_file_name, '.');
int have_iext= iext && !strcmp(iext, MI_NAME_IEXT);
if (options & HA_OPTION_TMP_TABLE)
{
char *path;
/* chop off the table name, tempory tables use generated name */
if ((path= strrchr(ci->index_file_name, FN_LIBCHAR)))
*path= '\0';
fn_format(filename, name, ci->index_file_name, MI_NAME_IEXT,
MY_REPLACE_DIR | MY_UNPACK_FILENAME |
MY_RETURN_REAL_PATH | MY_APPEND_EXT);
}
else
{
fn_format(filename, ci->index_file_name, "", MI_NAME_IEXT,
MY_UNPACK_FILENAME | MY_RETURN_REAL_PATH |
(have_iext ? MY_REPLACE_EXT : MY_APPEND_EXT));
}
fn_format(linkname, name, "", MI_NAME_IEXT,
MY_UNPACK_FILENAME|MY_APPEND_EXT);
linkname_ptr=linkname;
/*
Don't create the table if the link or file exists to ensure that one
doesn't accidently destroy another table.
*/
create_flag=0;
}
else
{
char *iext= strrchr(name, '.');
int have_iext= iext && !strcmp(iext, MI_NAME_IEXT);
fn_format(filename, name, "", MI_NAME_IEXT,
MY_UNPACK_FILENAME | MY_RETURN_REAL_PATH |
(have_iext ? MY_REPLACE_EXT : MY_APPEND_EXT));
linkname_ptr=0;
/* Replace the current file */
create_flag=(flags & HA_CREATE_KEEP_FILES) ? 0 : MY_DELETE_OLD;
}
/*
If a MRG_MyISAM table is in use, the mapped MyISAM tables are open,
but no entry is made in the table cache for them.
A TRUNCATE command checks for the table in the cache only and could
be fooled to believe, the table is not open.
Pull the emergency brake in this situation. (Bug #8306)
NOTE: The filename is compared against unique_file_name of every
open table. Hence we need a real path here.
*/
if (!internal_table && test_if_reopen(filename))
{
my_printf_error(0, "MyISAM table '%s' is in use "
"(most likely by a MERGE table). Try FLUSH TABLES.",
MYF(0), name + dirname_length(name));
my_errno= HA_ERR_TABLE_EXIST;
goto err;
}
if ((file= mysql_file_create_with_symlink(mi_key_file_kfile,
linkname_ptr, filename, 0,
create_mode,
MYF(MY_WME | create_flag))) < 0)
goto err;
errpos=1;
if (!(flags & HA_DONT_TOUCH_DATA))
{
{
if (ci->data_file_name)
{
char *dext= strrchr(ci->data_file_name, '.');
int have_dext= dext && !strcmp(dext, MI_NAME_DEXT);
if (options & HA_OPTION_TMP_TABLE)
{
char *path;
/* chop off the table name, tempory tables use generated name */
if ((path= strrchr(ci->data_file_name, FN_LIBCHAR)))
*path= '\0';
fn_format(filename, name, ci->data_file_name, MI_NAME_DEXT,
MY_REPLACE_DIR | MY_UNPACK_FILENAME | MY_APPEND_EXT);
}
else
{
fn_format(filename, ci->data_file_name, "", MI_NAME_DEXT,
MY_UNPACK_FILENAME |
(have_dext ? MY_REPLACE_EXT : MY_APPEND_EXT));
}
fn_format(linkname, name, "",MI_NAME_DEXT,
MY_UNPACK_FILENAME | MY_APPEND_EXT);
linkname_ptr=linkname;
create_flag=0;
}
else
{
fn_format(filename,name,"", MI_NAME_DEXT,
MY_UNPACK_FILENAME | MY_APPEND_EXT);
linkname_ptr=0;
create_flag=(flags & HA_CREATE_KEEP_FILES) ? 0 : MY_DELETE_OLD;
}
if ((dfile=
mysql_file_create_with_symlink(mi_key_file_dfile,
linkname_ptr, filename, 0,
create_mode,
MYF(MY_WME | create_flag))) < 0)
goto err;
}
errpos=3;
}
DBUG_PRINT("info", ("write state info and base info"));
if (mi_state_info_write(file, &share.state, 2) ||
mi_base_info_write(file, &share.base))
goto err;
#ifndef DBUG_OFF
if ((uint) mysql_file_tell(file, MYF(0)) != base_pos + MI_BASE_INFO_SIZE)
{
uint pos=(uint) mysql_file_tell(file, MYF(0));
DBUG_PRINT("warning",("base_length: %d != used_length: %d",
base_pos+ MI_BASE_INFO_SIZE, pos));
}
#endif
/* Write key and keyseg definitions */
DBUG_PRINT("info", ("write key and keyseg definitions"));
for (i=0 ; i < share.base.keys - uniques; i++)
{
uint sp_segs=(keydefs[i].flag & HA_SPATIAL) ? 2*SPDIMS : 0;
if (mi_keydef_write(file, &keydefs[i]))
goto err;
for (j=0 ; j < keydefs[i].keysegs-sp_segs ; j++)
if (mi_keyseg_write(file, &keydefs[i].seg[j]))
goto err;
#ifdef HAVE_SPATIAL
for (j=0 ; j < sp_segs ; j++)
{
HA_KEYSEG sseg;
sseg.type=SPTYPE;
sseg.language= 7; /* Binary */
sseg.null_bit=0;
sseg.bit_start=0;
sseg.bit_end=0;
sseg.bit_length= 0;
sseg.bit_pos= 0;
sseg.length=SPLEN;
sseg.null_pos=0;
sseg.start=j*SPLEN;
sseg.flag= HA_SWAP_KEY;
if (mi_keyseg_write(file, &sseg))
goto err;
}
#endif
}
/* Create extra keys for unique definitions */
offset= real_reclength - uniques * MI_UNIQUE_HASH_LENGTH;
memset(&tmp_keydef, 0, sizeof(tmp_keydef));
memset(&tmp_keyseg, 0, sizeof(tmp_keyseg));
for (i=0; i < uniques ; i++)
{
tmp_keydef.keysegs=1;
tmp_keydef.flag= HA_UNIQUE_CHECK;
tmp_keydef.block_length= (uint16)myisam_block_size;
tmp_keydef.keylength= MI_UNIQUE_HASH_LENGTH + pointer;
tmp_keydef.minlength=tmp_keydef.maxlength=tmp_keydef.keylength;
tmp_keyseg.type= MI_UNIQUE_HASH_TYPE;
tmp_keyseg.length= MI_UNIQUE_HASH_LENGTH;
tmp_keyseg.start= offset;
offset+= MI_UNIQUE_HASH_LENGTH;
if (mi_keydef_write(file,&tmp_keydef) ||
mi_keyseg_write(file,(&tmp_keyseg)))
goto err;
}
/* Save unique definition */
DBUG_PRINT("info", ("write unique definitions"));
for (i=0 ; i < share.state.header.uniques ; i++)
{
HA_KEYSEG *keyseg_end;
keyseg= uniquedefs[i].seg;
if (mi_uniquedef_write(file, &uniquedefs[i]))
goto err;
for (keyseg= uniquedefs[i].seg, keyseg_end= keyseg+ uniquedefs[i].keysegs;
keyseg < keyseg_end;
keyseg++)
{
switch (keyseg->type) {
case HA_KEYTYPE_VARTEXT1:
case HA_KEYTYPE_VARTEXT2:
case HA_KEYTYPE_VARBINARY1:
case HA_KEYTYPE_VARBINARY2:
if (!(keyseg->flag & HA_BLOB_PART))
{
keyseg->flag|= HA_VAR_LENGTH_PART;
keyseg->bit_start= ((keyseg->type == HA_KEYTYPE_VARTEXT1 ||
keyseg->type == HA_KEYTYPE_VARBINARY1) ?
1 : 2);
}
break;
default:
break;
}
if (mi_keyseg_write(file, keyseg))
goto err;
}
}
DBUG_PRINT("info", ("write field definitions"));
for (i=0 ; i < share.base.fields ; i++)
if (mi_recinfo_write(file, &recinfo[i]))
goto err;
#ifndef DBUG_OFF
if ((uint) mysql_file_tell(file, MYF(0)) != info_length)
{
uint pos= (uint) mysql_file_tell(file, MYF(0));
DBUG_PRINT("warning",("info_length: %d != used_length: %d",
info_length, pos));
}
#endif
/* Enlarge files */
DBUG_PRINT("info", ("enlarge to keystart: %lu", (ulong) share.base.keystart));
if (mysql_file_chsize(file, (ulong) share.base.keystart, 0, MYF(0)))
goto err;
if (! (flags & HA_DONT_TOUCH_DATA))
{
#ifdef USE_RELOC
if (mysql_file_chsize(dfile, share.base.min_pack_length*ci->reloc_rows,
0, MYF(0)))
goto err;
#endif
errpos=2;
if (mysql_file_close(dfile, MYF(0)))
goto err;
}
errpos=0;
if (!internal_table)
mysql_mutex_unlock(&THR_LOCK_myisam);
if (mysql_file_close(file, MYF(0)))
goto err_no_lock;
my_free(rec_per_key_part);
DBUG_RETURN(0);
err:
if (!internal_table)
mysql_mutex_unlock(&THR_LOCK_myisam);
err_no_lock:
save_errno=my_errno;
switch (errpos) {
case 3:
(void) mysql_file_close(dfile, MYF(0));
/* fall through */
case 2:
if (! (flags & HA_DONT_TOUCH_DATA))
mysql_file_delete_with_symlink(mi_key_file_dfile,
fn_format(filename, name, "", MI_NAME_DEXT,
MY_UNPACK_FILENAME | MY_APPEND_EXT),
MYF(0));
/* fall through */
case 1:
(void) mysql_file_close(file, MYF(0));
if (! (flags & HA_DONT_TOUCH_DATA))
mysql_file_delete_with_symlink(mi_key_file_kfile,
fn_format(filename, name, "", MI_NAME_IEXT,
MY_UNPACK_FILENAME | MY_APPEND_EXT),
MYF(0));
}
my_free(rec_per_key_part);
DBUG_RETURN(my_errno=save_errno); /* return the fatal errno */
}
/*
my_ascii_to_lattice - ASCII字符转换成点阵
fontdata：点阵字库指针
character_width：点阵宽度(比如32*32的点阵，宽度是32)
strings：字符串
lattice：转换后的点阵数据
w/h：转换后的点阵数据的宽、高
注：fontdata取模是' '开始(前32个字符是不可打印字符)，使用PCtoLCD2002.exe软件，取模方式：逐列式，低位在前
*/
static void my_ascii_to_lattice(unsigned char* fontdata, int char_width, char* strings, unsigned char* lattice, int* w, int* h)
{
#define MY_ALIGN(x, a) (((x)+(a)-1)&~((a)-1)) // 字节对齐(此处点阵只使用8字节对齐)
unsigned char tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7, tmp8;
int offset_byte = 0; // 点阵所占字节偏移
char* q = NULL;
int i,j, k;
int len = 0;
int width = 0;
int height = 0;
int half_width = char_width / 2; // 半角
int char_height = MY_ALIGN(char_width, 8); // 高(必须是8的整数倍)
int char_halfwidth_size = MY_ALIGN(char_width, 8)*char_width/2/8; // 半角点阵总大小
if (fontdata == NULL || strings == NULL || lattice == NULL || w == NULL || h == NULL) return;
len = (int)strlen((const char *)strings);
width = len * half_width;
height = char_height;
q = (char*)lattice;
*w = width;
*h = height;
// 多少个字符
for ( i = 0; i < len; ++i )
{
// 前面32(0x20)个是不可打印字符，故要减去0x20
unsigned char* p = fontdata + ((strings[i] - 0x20) * char_halfwidth_size);
// 每个字符宽是半角
for ( j = 0; j < half_width; ++j )
{
// 每个字符高有多少个字节
for (k = 0; k < char_height/8; k++)
{
offset_byte = k * 8;
// 分解点阵一个字节所有的位
// 注： 低位在前
tmp1 = (*p & 0x01) >> 0;
tmp2 = (*p & 0x02) >> 1;
tmp3 = (*p & 0x04) >> 2;
tmp4 = (*p & 0x08) >> 3;
tmp5 = (*p & 0x10) >> 4;
tmp6 = (*p & 0x20) >> 5;
tmp7 = (*p & 0x40) >> 6;
tmp8 = (*p & 0x80) >> 7;
// height/8个字节
q[width * (0+offset_byte) + half_width * i + j] = tmp1;
q[width * (1+offset_byte) + half_width * i + j] = tmp2;
q[width * (2+offset_byte) + half_width * i + j] = tmp3;
q[width * (3+offset_byte) + half_width * i + j] = tmp4;
q[width * (4+offset_byte) + half_width * i + j] = tmp5;
q[width * (5+offset_byte) + half_width * i + j] = tmp6;
q[width * (6+offset_byte) + half_width * i + j] = tmp7;
q[width * (7+offset_byte) + half_width * i + j] = tmp8;
p++;
}
}
}
}
static void get_options( int argc, char *argv[])
{
char *pos,*progname;
DEBUGGER_OFF;
progname= argv[0];
while (--argc >0 && *(pos = *(++argv)) == '-' ) {
switch(*++pos) {
case 'b':
if (*++pos)
nisam_block_size= MY_ALIGN(atoi(pos),512);
set_if_bigger(nisam_block_size,8192); /* Max block size */
set_if_smaller(nisam_block_size,1024);
break;
case 'B':
use_blob=1;
break;
case 'K': /* Use key cacheing */
key_cacheing=1;
break;
case 'W': /* Use write cacheing */
write_cacheing=1;
if (*++pos)
my_default_record_cache_size=atoi(pos);
break;
case 'i':
if (*++pos)
srand(atoi(pos));
break;
case 'l':
use_log=1;
break;
case 'L':
locking=1;
break;
case 'A': /* use asyncron io */
async_io=1;
if (*++pos)
my_default_record_cache_size=atoi(pos);
break;
case 'v': /* verbose */
verbose=1;
break;
case 'm': /* records */
recant=atoi(++pos);
break;
case 'f':
if ((first_key=atoi(++pos)) <0 || first_key >= NISAM_KEYS)
first_key=0;
break;
case 'k':
if ((keys=(uint) atoi(++pos)) < 1 ||
keys > (uint) (NISAM_KEYS-first_key))
keys=NISAM_KEYS-first_key;
break;
case 'P':
pack_type=0; /* Don't use DIFF_LENGTH */
break;
case 'R': /* Length of record pointer */
rec_pointer_size=atoi(++pos);
if (rec_pointer_size > 3)
rec_pointer_size=0;
break;
case 'S':
pack_fields=0; /* Static-length-records */
break;
case 't':
testflag=atoi(++pos); /* testmod */
break;
case '?':
case 'I':
case 'V':
printf("%s Ver 1.4 for %s at %s\n",progname,SYSTEM_TYPE,MACHINE_TYPE);
puts("TCX Datakonsult AB, by Monty, for your professional use\n");
printf("Usage: %s [-?ABIKLPRSVWltv] [-b#] [-k#] [-f#] [-m#] [-t#]\n",progname);
exit(0);
case '#':
DEBUGGER_ON;
DBUG_PUSH (++pos);
break;
default:
printf("Illegal option: '%c'\n",*pos);
break;
}
}
return;
} /* get options */
int nisam_create(const char *name,uint keys,N_KEYDEF *keyinfo,
N_RECINFO *recinfo,
ulong records,ulong reloc, uint flags,uint old_options,
ulong data_file_length)
{
register uint i,j;
File dfile,file;
int errpos,save_errno;
uint fields,length,max_key_length,packed,pointer,reclength,min_pack_length,
key_length,info_length,key_segs,options,min_key_length_skipp,max_block,
base_pos;
char buff[max(FN_REFLEN,512)];
ulong tot_length,pack_reclength;
enum en_fieldtype type;
ISAM_SHARE share;
N_KEYDEF *keydef;
N_KEYSEG *keyseg;
N_RECINFO *rec;
DBUG_ENTER("nisam_create");
LINT_INIT(dfile);
pthread_mutex_lock(&THR_LOCK_isam);
errpos=0;
options=0;
base_pos=512; /* Enough for N_STATE_INFO */
bzero((byte*) &share,sizeof(share));
if ((file = my_create(fn_format(buff,name,"",N_NAME_IEXT,4),0,
O_RDWR | O_TRUNC,MYF(MY_WME))) < 0)
goto err;
errpos=1;
VOID(fn_format(buff,name,"",N_NAME_DEXT,2+4));
if (!(flags & HA_DONT_TOUCH_DATA))
{
if ((dfile = my_create(buff,0,O_RDWR | O_TRUNC,MYF(MY_WME))) < 0)
goto err;
errpos=2;
}
else if (!(old_options & HA_OPTION_TEMP_COMPRESS_RECORD))
options=old_options & (HA_OPTION_COMPRESS_RECORD |
HA_OPTION_READ_ONLY_DATA | HA_OPTION_PACK_RECORD);
if (reloc > records)
reloc=records; /* Check if wrong parameter */
/* Start by checking fields and field-types used */
reclength=0;
for (rec=recinfo, fields=packed=min_pack_length=0, pack_reclength=0L;
rec->base.type != (int) FIELD_LAST;
rec++,fields++)
{
reclength+=rec->base.length;
if ((type=(enum en_fieldtype) rec->base.type))
{
packed++;
if (type == FIELD_BLOB)
{
share.base.blobs++;
rec->base.length-= sizeof(char*); /* Don't calc pointer */
if (pack_reclength != NI_POS_ERROR)
{
if (rec->base.length == 4)
pack_reclength= (ulong) NI_POS_ERROR;
else
pack_reclength+=sizeof(char*)+(1 << (rec->base.length*8));
}
}
else if (type == FIELD_SKIP_PRESPACE ||
type == FIELD_SKIP_ENDSPACE)
{
if (pack_reclength != NI_POS_ERROR)
pack_reclength+= rec->base.length > 255 ? 2 : 1;
min_pack_length++;
}
else if (type == FIELD_ZERO)
packed--;
else if (type != FIELD_SKIP_ZERO)
{
min_pack_length+=rec->base.length;
packed--; /* Not a pack record type */
}
}
else
min_pack_length+=rec->base.length;
}
if ((packed & 7) == 1)
{ /* Bad packing, try to remove a zero-field */
while (rec != recinfo)
{
rec--;
if (rec->base.type == (int) FIELD_SKIP_ZERO && rec->base.length == 1)
{
rec->base.type=(int) FIELD_NORMAL;
packed--;
min_pack_length++;
break;
}
}
}
if (packed && !(options & HA_OPTION_COMPRESS_RECORD))
options|=HA_OPTION_PACK_RECORD; /* Must use packed records */
packed=(packed+7)/8;
if (pack_reclength != NI_POS_ERROR)
pack_reclength+= reclength+packed;
min_pack_length+=packed;
if (options & HA_OPTION_COMPRESS_RECORD)
{
if (data_file_length >= (1L << 24))
pointer=4;
else if (data_file_length >= (1L << 16))
pointer=3;
else
pointer=2;
}
else if (((records == 0L && pack_reclength < 255) ||
options & HA_OPTION_PACK_RECORD) ||
records >= (ulong) 16000000L ||
pack_reclength == (ulong) NI_POS_ERROR ||
((options & HA_OPTION_PACK_RECORD) &&
pack_reclength+4 >= (ulong) 14000000L/records))
pointer=4;
else if (records == 0L || records >= (ulong) 65000L ||
((options & HA_OPTION_PACK_RECORD) &&
pack_reclength+4 >= (ulong) 60000L/records))
pointer=3;
else
pointer=2;
max_block=max_key_length=0; tot_length=key_segs=0;
for (i=0, keydef=keyinfo ; i < keys ; i++ , keydef++)
{
share.state.key_root[i]= share.state.key_del[i]= NI_POS_ERROR;
share.base.rec_per_key[i]= (keydef->base.flag & HA_NOSAME) ? 1L : 0L;
min_key_length_skipp=length=0;
key_length=pointer;
if (keydef->base.flag & HA_PACK_KEY &&
keydef->seg[0].base.length > 127)
keydef->base.flag&= ~HA_PACK_KEY; /* Can't pack long keys */
if (keydef->base.flag & HA_PACK_KEY)
{
if ((keydef->seg[0].base.flag & HA_SPACE_PACK) &&
keydef->seg[0].base.type == (int) HA_KEYTYPE_NUM)
keydef->seg[0].base.flag&= ~HA_SPACE_PACK;
if (!(keydef->seg[0].base.flag & HA_SPACE_PACK))
length++;
keydef->seg[0].base.flag|=HA_PACK_KEY; /* for easyer intern test */
options|=HA_OPTION_PACK_KEYS; /* Using packed keys */
if (!(keydef->seg[0].base.flag & HA_SPACE_PACK))
min_key_length_skipp+=keydef->seg[0].base.length;
}
keydef->base.keysegs=0;
for (keyseg=keydef->seg ; keyseg->base.type ; keyseg++)
{
keydef->base.keysegs++;
if (keyseg->base.length > 127)
keyseg->base.flag&= ~(HA_SPACE_PACK | HA_PACK_KEY);
if (keyseg->base.flag & HA_SPACE_PACK)
{
keydef->base.flag |= HA_SPACE_PACK_USED;
options|=HA_OPTION_PACK_KEYS; /* Using packed keys */
length++;
min_key_length_skipp+=keyseg->base.length;
}
key_length+= keyseg->base.length;
}
bzero((gptr) keyseg,sizeof(keyseg[0]));
keyseg->base.length=(uint16) pointer; /* Last key part is pointer */
key_segs+=keydef->base.keysegs;
length+=key_length;
keydef->base.block_length=nisam_block_size;
keydef->base.keylength= (uint16) key_length;
keydef->base.minlength= (uint16) (length-min_key_length_skipp);
keydef->base.maxlength= (uint16) length;
if ((uint) keydef->base.block_length > max_block)
max_block=(uint) keydef->base.block_length;
if (length > max_key_length)
max_key_length= length;
tot_length+= (records/(ulong) (((uint) keydef->base.block_length-5)/
(length*2)))*
(ulong) keydef->base.block_length;
}
info_length=(uint) (base_pos+sizeof(N_BASE_INFO)+keys*sizeof(N_SAVE_KEYDEF)+
(keys+key_segs)*sizeof(N_SAVE_KEYSEG)+
fields*sizeof(N_SAVE_RECINFO));
bmove(share.state.header.file_version,(byte*) nisam_file_magic,4);
old_options=options| (old_options & HA_OPTION_TEMP_COMPRESS_RECORD ?
HA_OPTION_COMPRESS_RECORD |
HA_OPTION_TEMP_COMPRESS_RECORD: 0);
int2store(share.state.header.options,old_options);
int2store(share.state.header.header_length,info_length);
int2store(share.state.header.state_info_length,sizeof(N_STATE_INFO));
int2store(share.state.header.base_info_length,sizeof(N_BASE_INFO));
int2store(share.state.header.base_pos,base_pos);
share.state.dellink = NI_POS_ERROR;
share.state.process= (ulong) getpid();
share.state.uniq= (ulong) file;
share.state.loop= 0;
share.state.version= (ulong) time((time_t*) 0);
share.base.options=options;
share.base.rec_reflength=pointer;
share.base.key_reflength=((!tot_length || tot_length > 30000000L) ? 3 :
tot_length > 120000L ? 2 : 1);
share.base.keys= share.state.keys = keys;
share.base.keystart = share.state.key_file_length=MY_ALIGN(info_length,
nisam_block_size);
share.base.max_block=max_block;
share.base.max_key_length=(uint) ALIGN_SIZE(max_key_length+4);
share.base.records=records;
share.base.reloc=reloc;
share.base.reclength=reclength;
share.base.pack_reclength=
(uint) (reclength+packed-share.base.blobs*sizeof(char*));
share.base.max_pack_length=pack_reclength;
share.base.min_pack_length=min_pack_length;
share.base.pack_bits=packed;
share.base.fields=fields;
share.base.pack_fields=packed;
share.base.sortkey= (ushort) ~0;
share.base.max_data_file_length= (pointer == 4) ? (ulong) ~0L :
(options & (HA_OPTION_PACK_RECORD | HA_OPTION_COMPRESS_RECORD)) ?
(ulong) (1L << (pointer*8)) :
(pointer == 3 && reclength >= 256L) ? (ulong) NI_POS_ERROR :
((ulong) reclength * (1L << (pointer*8)));
share.base.max_key_file_length= (share.base.key_reflength == 3 ?
NI_POS_ERROR :
(ulong)
(1L << (share.base.key_reflength*8))*512);
share.base.min_block_length=
(share.base.pack_reclength+3 < N_EXTEND_BLOCK_LENGTH &&
! share.base.blobs) ?
max(share.base.pack_reclength,N_MIN_BLOCK_LENGTH) :
N_EXTEND_BLOCK_LENGTH;
if (! (flags & HA_DONT_TOUCH_DATA))
share.base.create_time= (long) time((time_t*) 0);
bzero(buff,base_pos);
if (my_write(file,(char*) &share.state,sizeof(N_STATE_INFO),MYF(MY_NABP)) ||
my_write(file,buff,base_pos-sizeof(N_STATE_INFO),MYF(MY_NABP)) ||
my_write(file,(char*) &share.base,sizeof(N_BASE_INFO),MYF(MY_NABP)))
goto err;
for (i=0 ; i < share.base.keys ; i++)
{
if (my_write(file,(char*) &keyinfo[i].base,sizeof(N_SAVE_KEYDEF),
MYF(MY_NABP)))
goto err;
for (j=0 ; j <= keyinfo[i].base.keysegs ; j++)
{
if (my_write(file,(char*) &keyinfo[i].seg[j].base,sizeof(N_SAVE_KEYSEG),
MYF(MY_NABP)))
goto err;
}
}
for (i=0 ; i < share.base.fields ; i++)
if (my_write(file,(char*) &recinfo[i].base, (uint) sizeof(N_SAVE_RECINFO),
MYF(MY_NABP)))
goto err;
/* Enlarge files */
if (my_chsize(file, (ulong) share.base.keystart, 0, MYF(0)))
goto err;
if (! (flags & HA_DONT_TOUCH_DATA))
{
#ifdef USE_RELOC
if (my_chsize(dfile, share.base.min_pack_length*reloc, 0, MYF(0)))
goto err;
#endif
errpos=1;
if (my_close(dfile,MYF(0)))
goto err;
}
errpos=0;
pthread_mutex_unlock(&THR_LOCK_isam);
if (my_close(file,MYF(0)))
goto err;
DBUG_RETURN(0);
err:
pthread_mutex_unlock(&THR_LOCK_isam);
save_errno=my_errno;
switch (errpos) {
case 2:
VOID(my_close(dfile,MYF(0)));
/* fall through */
case 1:
VOID(my_close(file,MYF(0)));
}
my_errno=save_errno; /* R{tt felkod tillbaka */
DBUG_RETURN(-1);
} /* nisam_create */