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/* Copyright (C) 2000 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/* Functions to handle typelib */
#include "mysys_priv.h"
#include <m_string.h>
#include <m_ctype.h>
static const char field_separator=',';
int find_type_or_exit(const char *x, TYPELIB *typelib, const char *option)
{
int res;
const char **ptr;
if ((res= find_type((char *) x, typelib, 2)) <= 0)
{
ptr= typelib->type_names;
if (!*x)
fprintf(stderr, "No option given to %s\n", option);
else
fprintf(stderr, "Unknown option to %s: %s\n", option, x);
fprintf(stderr, "Alternatives are: '%s'", *ptr);
while (*++ptr)
fprintf(stderr, ",'%s'", *ptr);
fprintf(stderr, "\n");
exit(1);
}
return res;
}
/*
Search after a string in a list of strings. Endspace in x is not compared.
SYNOPSIS
find_type()
x String to find
lib TYPELIB (struct of pointer to values + count)
full_name bitmap of what to do
If & 1 accept only whole names
If & 2 don't expand if half field
If & 4 allow #number# as type
If & 8 use ',' as string terminator
NOTES
If part, uniq field is found and full_name == 0 then x is expanded
to full field.
RETURN
-1 Too many matching values
0 No matching value
>0 Offset+1 in typelib for matched string
*/
int find_type(char *x, const TYPELIB *typelib, uint full_name)
{
int find,pos;
int UNINIT_VAR(findpos); /* guarded by find */
reg1 char * i;
reg2 const char *j;
DBUG_ENTER("find_type");
DBUG_PRINT("enter",("x: '%s' lib: 0x%lx", x, (long) typelib));
if (!typelib->count)
{
DBUG_PRINT("exit",("no count"));
DBUG_RETURN(0);
}
find=0;
for (pos=0 ; (j=typelib->type_names[pos]) ; pos++)
{
for (i=x ;
*i && (!(full_name & 8) || *i != field_separator) &&
my_toupper(&my_charset_latin1,*i) ==
my_toupper(&my_charset_latin1,*j) ; i++, j++) ;
if (! *j)
{
while (*i == ' ')
i++; /* skip_end_space */
if (! *i || ((full_name & 8) && *i == field_separator))
DBUG_RETURN(pos+1);
}
if ((!*i && (!(full_name & 8) || *i != field_separator)) &&
(!*j || !(full_name & 1)))
{
find++;
findpos=pos;
}
}
if (find == 0 && (full_name & 4) && x[0] == '#' && strend(x)[-1] == '#' &&
(findpos=atoi(x+1)-1) >= 0 && (uint) findpos < typelib->count)
find=1;
else if (find == 0 || ! x[0])
{
DBUG_PRINT("exit",("Couldn't find type"));
DBUG_RETURN(0);
}
else if (find != 1 || (full_name & 1))
{
DBUG_PRINT("exit",("Too many possybilities"));
DBUG_RETURN(-1);
}
if (!(full_name & 2))
(void) strmov(x,typelib->type_names[findpos]);
DBUG_RETURN(findpos+1);
} /* find_type */
/* Get name of type nr 'nr' */
/* Warning first type is 1, 0 = empty field */
void make_type(register char * to, register uint nr,
register TYPELIB *typelib)
{
DBUG_ENTER("make_type");
if (!nr)
to[0]=0;
else
(void) strmov(to,get_type(typelib,nr-1));
DBUG_VOID_RETURN;
} /* make_type */
/* Get type */
/* Warning first type is 0 */
const char *get_type(TYPELIB *typelib, uint nr)
{
if (nr < (uint) typelib->count && typelib->type_names)
return(typelib->type_names[nr]);
return "?";
}
/*
Create an integer value to represent the supplied comma-seperated
string where each string in the TYPELIB denotes a bit position.
SYNOPSIS
find_typeset()
x string to decompose
lib TYPELIB (struct of pointer to values + count)
err index (not char position) of string element which was not
found or 0 if there was no error
RETURN
a integer representation of the supplied string
*/
my_ulonglong find_typeset(char *x, TYPELIB *lib, int *err)
{
my_ulonglong result;
int find;
char *i;
DBUG_ENTER("find_set");
DBUG_PRINT("enter",("x: '%s' lib: 0x%lx", x, (long) lib));
if (!lib->count)
{
DBUG_PRINT("exit",("no count"));
DBUG_RETURN(0);
}
result= 0;
*err= 0;
while (*x)
{
(*err)++;
i= x;
while (*x && *x != field_separator)
x++;
if (x[0] && x[1]) /* skip separator if found */
x++;
if ((find= find_type(i, lib, 2 | 8) - 1) < 0)
DBUG_RETURN(0);
result|= (ULL(1) << find);
}
*err= 0;
DBUG_RETURN(result);
} /* find_set */
/*
Create a copy of a specified TYPELIB structure.
SYNOPSIS
copy_typelib()
root pointer to a MEM_ROOT object for allocations
from pointer to a source TYPELIB structure
RETURN
pointer to the new TYPELIB structure on successful copy, or
NULL otherwise
*/
TYPELIB *copy_typelib(MEM_ROOT *root, TYPELIB *from)
{
TYPELIB *to;
uint i;
if (!from)
return NULL;
if (!(to= (TYPELIB*) alloc_root(root, sizeof(TYPELIB))))
return NULL;
if (!(to->type_names= (const char **)
alloc_root(root, (sizeof(char *) + sizeof(int)) * (from->count + 1))))
return NULL;
to->type_lengths= (unsigned int *)(to->type_names + from->count + 1);
to->count= from->count;
if (from->name)
{
if (!(to->name= strdup_root(root, from->name)))
return NULL;
}
else
to->name= NULL;
for (i= 0; i < from->count; i++)
{
if (!(to->type_names[i]= strmake_root(root, from->type_names[i],
from->type_lengths[i])))
return NULL;
to->type_lengths[i]= from->type_lengths[i];
}
to->type_names[to->count]= NULL;
to->type_lengths[to->count]= 0;
return to;
}
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