int tbl_cache_free(tbl_cache_p _tbc)
{
// FILL IT IN ?????????????
if(!_tbc)
return -1;
lock_get(&_tbc->sem);
if(_tbc->dtp)
dbt_table_free(_tbc->dtp);
lock_destroy(&_tbc->sem);
shm_free(_tbc);
return 0;
}
int dbt_cache_destroy(void)
{
int i;
dbt_cache_p _dc=NULL, _dc0=NULL;
dbt_table_p _tbc = NULL;
dbt_table_p _tbc0 = NULL;
if(!_dbt_cachesem)
return -1;
lock_get(_dbt_cachesem);
if( _dbt_cachedb!=NULL )
{
_dc = *_dbt_cachedb;
while(_dc)
{
_dc0 = _dc;
_dc = _dc->next;
shm_free(_dc0->name.s);
shm_free(_dc0);
}
shm_free(_dbt_cachedb);
}
lock_destroy(_dbt_cachesem);
lock_dealloc(_dbt_cachesem);
/* destroy tables' hash table*/
if(_dbt_cachetbl==0)
return 0;
for(i=0; i<DBT_CACHETBL_SIZE; i++)
{
lock_destroy(&_dbt_cachetbl[i].sem);
_tbc = _dbt_cachetbl[i].dtp;
while(_tbc)
{
_tbc0 = _tbc;
_tbc = _tbc->next;
dbt_table_free(_tbc0);
}
}
shm_free(_dbt_cachetbl);
return 0;
}
int dbt_db_del_table(dbt_cache_p _dc, const str *_s, int sync)
{
dbt_table_p _tbc = NULL;
int hash;
int hashidx;
if(!_dbt_cachetbl || !_dc || !_s || !_s->s || _s->len<=0)
return -1;
hash = core_hash(&_dc->name, _s, DBT_CACHETBL_SIZE);
hashidx = hash % DBT_CACHETBL_SIZE;
if(sync)
lock_get(&_dbt_cachetbl[hashidx].sem);
_tbc = _dbt_cachetbl[hashidx].dtp;
while(_tbc)
{
if(_tbc->hash==hash && _tbc->dbname.len == _dc->name.len
&& _tbc->name.len == _s->len
&& !strncasecmp(_tbc->dbname.s, _dc->name.s, _dc->name.len)
&& !strncasecmp(_tbc->name.s, _s->s, _s->len))
{
if(_tbc->prev)
(_tbc->prev)->next = _tbc->next;
else
_dbt_cachetbl[hashidx].dtp = _tbc->next;
if(_tbc->next)
(_tbc->next)->prev = _tbc->prev;
break;
}
_tbc = _tbc->next;
}
if(sync)
lock_release(&_dbt_cachetbl[hashidx].sem);
dbt_table_free(_tbc);
return 0;
}
dbt_table_p dbt_load_file(const str *tbn, const str *dbn)
{
FILE *fin=NULL;
char path[512], buf[4096];
int c, crow, ccol, bp, sign, max_auto;
dbt_val_t dtval;
dbt_table_p dtp = NULL;
dbt_column_p colp, colp0 = NULL;
dbt_row_p rowp, rowp0 = NULL;
enum {DBT_FLINE_ST, DBT_NLINE_ST, DBT_DATA_ST} state;
LM_DBG("request for table [%.*s]\n", tbn->len, tbn->s);
if(!tbn || !tbn->s || tbn->len<=0 || tbn->len>=255)
return NULL;
path[0] = 0;
if(dbn && dbn->s && dbn->len>0)
{
LM_DBG("db is [%.*s]\n", dbn->len, dbn->s);
if(dbn->len+tbn->len<511)
{
strncpy(path, dbn->s, dbn->len);
path[dbn->len] = '/';
strncpy(path+dbn->len+1, tbn->s, tbn->len);
path[dbn->len+tbn->len+1] = 0;
}
}
if(path[0] == 0)
{
strncpy(path, tbn->s, tbn->len);
path[tbn->len] = 0;
}
LM_DBG("loading file [%s]\n", path);
fin = fopen(path, "rt");
if(!fin)
return NULL;
dtp = dbt_table_new(tbn, dbn, path);
if(!dtp)
goto done;
state = DBT_FLINE_ST;
crow = ccol = -1;
colp = colp0 = NULL;
rowp = rowp0 = NULL;
c = fgetc(fin);
max_auto = 0;
while(c!=EOF)
{
switch(state)
{
case DBT_FLINE_ST:
//LM_DBG("state FLINE!\n");
bp = 0;
while(c==DBT_DELIM_C)
c = fgetc(fin);
if(c==DBT_DELIM_R && !colp0)
goto clean;
if(c==DBT_DELIM_R)
{
if(dtp->nrcols <= 0)
goto clean;
dtp->colv = (dbt_column_p*)
shm_malloc(dtp->nrcols*sizeof(dbt_column_p));
if(!dtp->colv)
goto clean;
colp0 = dtp->cols;
for(ccol=0; ccol<dtp->nrcols && colp0; ccol++)
{
dtp->colv[ccol] = colp0;
colp0 = colp0->next;
}
state = DBT_NLINE_ST;
break;
}
while(c!=DBT_DELIM_C && c!='(' && c!=DBT_DELIM_R)
{
if(c==EOF)
goto clean;
buf[bp++] = c;
c = fgetc(fin);
}
colp = dbt_column_new(buf, bp);
if(!colp)
goto clean;
//LM_DBG("new col [%.*s]\n", bp, buf);
while(c==DBT_DELIM_C)
c = fgetc(fin);
if(c!='(')
goto clean;
c = fgetc(fin);
while(c==DBT_DELIM_C)
c = fgetc(fin);
switch(c)
{
case 's':
case 'S':
colp->type = DB_STR;
LM_DBG("column[%d] is STR!\n", ccol+1);
break;
case 'i':
case 'I':
colp->type = DB_INT;
LM_DBG("column[%d] is INT!\n", ccol+1);
break;
case 'l':
case 'L':
colp->type = DB_BIGINT;
LM_DBG("column[%d] is BIGINT!\n", ccol+1);
break;
case 'd':
case 'D':
colp->type = DB_DOUBLE;
LM_DBG("column[%d] is DOUBLE!\n", ccol+1);
break;
case 'b':
case 'B':
colp->type = DB_BLOB;
LM_DBG("column[%d] is BLOB!\n", ccol+1);
break;
case 't':
case 'T':
colp->type = DB_DATETIME;
LM_DBG("column[%d] is TIME!\n", ccol+1);
break;
default:
LM_DBG("wrong column type!\n");
goto clean;
}
while(c!='\n' && c!=EOF && c!=')' && c!= ',')
{
if(colp->type == DB_STR && (c=='i'|| c=='I'))
{
colp->type = DB_STRING;
LM_DBG("column[%d] is actually STRING!\n", ccol+1);
}
c = fgetc(fin);
}
if(c==',')
{
//LM_DBG("c=%c!\n", c);
c = fgetc(fin);
while(c==DBT_DELIM_C)
c = fgetc(fin);
if(c=='N' || c=='n')
{
//LM_DBG("NULL flag set!\n");
colp->flag |= DBT_FLAG_NULL;
}
else if(colp->type==DB_INT && dtp->auto_col<0
&& (c=='A' || c=='a'))
{
//LM_DBG("AUTO flag set!\n");
colp->flag |= DBT_FLAG_AUTO;
dtp->auto_col = ccol+1;
}
else
goto clean;
while(c!=')' && c!=DBT_DELIM_R && c!=EOF)
c = fgetc(fin);
}
if(c == ')')
{
//LM_DBG("c=%c!\n", c);
if(colp0)
{
colp->prev = colp0;
colp0->next = colp;
}
else
dtp->cols = colp;
colp0 = colp;
dtp->nrcols++;
c = fgetc(fin);
}
else
goto clean;
ccol++;
break;
case DBT_NLINE_ST:
//LM_DBG("state NLINE!\n");
while(c==DBT_DELIM_R)
c = fgetc(fin);
if(rowp)
{
if(dbt_table_check_row(dtp, rowp))
goto clean;
if(!rowp0)
dtp->rows = rowp;
else
{
rowp0->next = rowp;
rowp->prev = rowp0;
}
rowp0 = rowp;
dtp->nrrows++;
}
if(c==EOF)
break;
crow++;
ccol = 0;
rowp = dbt_row_new(dtp->nrcols);
if(!rowp)
goto clean;
state = DBT_DATA_ST;
break;
case DBT_DATA_ST:
//LM_DBG("state DATA!\n");
//while(c==DBT_DELIM)
// c = fgetc(fin);
if(ccol == dtp->nrcols && (c==DBT_DELIM_R || c==EOF))
{
state = DBT_NLINE_ST;
break;
}
if(ccol>= dtp->nrcols)
goto clean;
switch(dtp->colv[ccol]->type)
{
case DB_INT:
case DB_BIGINT:
case DB_DATETIME:
//LM_DBG("INT value!\n");
dtval.val.int_val = 0;
dtval.type = dtp->colv[ccol]->type;
if(c==DBT_DELIM ||
(ccol==dtp->nrcols-1
&& (c==DBT_DELIM_R || c==EOF)))
dtval.nul = 1;
else
{
dtval.nul = 0;
sign = 1;
if(c=='-')
{
sign = -1;
c = fgetc(fin);
}
if(c<'0' || c>'9')
goto clean;
while(c>='0' && c<='9')
{
dtval.val.int_val=dtval.val.int_val*10+c-'0';
c = fgetc(fin);
}
dtval.val.int_val *= sign;
//LM_DBG("data[%d,%d]=%d\n", crow,
// ccol, dtval.val.int_val);
}
if(c!=DBT_DELIM && c!=DBT_DELIM_R && c!=EOF)
goto clean;
if(dbt_row_set_val(rowp,&dtval,dtp->colv[ccol]->type,
ccol))
goto clean;
if(ccol == dtp->auto_col)
max_auto = (max_auto<dtval.val.int_val)?
dtval.val.int_val:max_auto;
break;
case DB_DOUBLE:
//LM_DBG("DOUBLE value!\n");
dtval.val.double_val = 0.0;
dtval.type = DB_DOUBLE;
if(c==DBT_DELIM ||
(ccol==dtp->nrcols-1
&& (c==DBT_DELIM_R || c==EOF)))
dtval.nul = 1;
else
{
dtval.nul = 0;
sign = 1;
if(c=='-')
{
sign = -1;
c = fgetc(fin);
}
if(c<'0' || c>'9')
goto clean;
while(c>='0' && c<='9')
{
dtval.val.double_val = dtval.val.double_val*10
+ c - '0';
c = fgetc(fin);
}
if(c=='.')
{
c = fgetc(fin);
bp = 1;
while(c>='0' && c<='9')
{
bp *= 10;
dtval.val.double_val+=((double)(c-'0'))/bp;
c = fgetc(fin);
}
}
dtval.val.double_val *= sign;
//LM_DBG("data[%d,%d]=%10.2f\n",
// crow, ccol, dtval.val.double_val);
}
if(c!=DBT_DELIM && c!=DBT_DELIM_R && c!=EOF)
goto clean;
if(dbt_row_set_val(rowp,&dtval,DB_DOUBLE,ccol))
goto clean;
break;
case DB_STR:
case DB_STRING:
case DB_BLOB:
//LM_DBG("STR value!\n");
dtval.val.str_val.s = NULL;
dtval.val.str_val.len = 0;
dtval.type = dtp->colv[ccol]->type;
bp = 0;
if(c==DBT_DELIM ||
(ccol == dtp->nrcols-1
&& (c == DBT_DELIM_R || c==EOF)))
dtval.nul = 1;
else
{
dtval.nul = 0;
while(c!=DBT_DELIM && c!=DBT_DELIM_R && c!=EOF)
{
if(c=='\\')
{
c = fgetc(fin);
switch(c)
{
case 'n':
c = '\n';
break;
case 'r':
c = '\r';
break;
case 't':
c = '\t';
break;
case '\\':
c = '\\';
break;
case DBT_DELIM:
c = DBT_DELIM;
break;
case '0':
c = 0;
break;
default:
goto clean;
}
}
buf[bp++] = c;
c = fgetc(fin);
}
dtval.val.str_val.s = buf;
dtval.val.str_val.len = bp;
//LM_DBG("data[%d,%d]=%.*s\n",
/// crow, ccol, bp, buf);
}
if(c!=DBT_DELIM && c!=DBT_DELIM_R && c!=EOF)
goto clean;
if(dbt_row_set_val(rowp,&dtval,dtp->colv[ccol]->type,
ccol))
goto clean;
break;
default:
goto clean;
}
if(c==DBT_DELIM)
c = fgetc(fin);
ccol++;
break; // state DBT_DATA_ST
}
}
if(max_auto)
dtp->auto_val = max_auto;
done:
if(fin)
fclose(fin);
return dtp;
clean:
/// ????? FILL IT IN - incomplete row/column
// memory leak?!?! with last incomplete row
LM_DBG("error at row=%d col=%d c=%c\n", crow+1, ccol+1, c);
if(dtp)
dbt_table_free(dtp);
return NULL;
}
