/*!
* \brief Create tempfile from process id.
*
* See G_tempfile().
*
* \param pid
* \return pointer to string path
*/
char *G__tempfile(int pid)
{
char path[GPATH_MAX];
char name[GNAME_MAX];
char element[100];
if (pid <= 0)
pid = getpid();
G__temp_element(element);
G_init_tempfile();
do {
int uniq = G_counter_next(&unique);
sprintf(name, "%d.%d", pid, uniq);
G_file_name(path, element, name, G_mapset());
}
while (access(path, F_OK) == 0);
return G_store(path);
}
int save_table(int t)
{
int i, j, ncols, nrows, ret, field, rec;
char name[2000], fname[20], element[100];
DBFHandle dbf;
ROW *rows;
VALUE *val;
int dbftype, width, decimals;
G_debug(2, "save_table %d", t);
/* Note: because if driver is killed during the time the table is written, the process
* is not completed and DATA ARE LOST. To minimize this, data are first written
* to temporary file and then this file is renamed to 'database/table.dbf'.
* Hopefully both file are on the same disk/partition */
if (!(db.tables[t].alive) || !(db.tables[t].updated))
return DB_OK;
/* Construct our temp name because shapelib doesn't like '.' in name */
G__temp_element(element);
sprintf(fname, "%d.dbf", getpid());
G_file_name(name, element, fname, G_mapset());
G_debug(2, "Write table to tempfile: '%s'", name);
dbf = DBFCreate(name);
if (dbf == NULL)
return DB_FAILED;
ncols = db.tables[t].ncols;
rows = db.tables[t].rows;
nrows = db.tables[t].nrows;
for (i = 0; i < ncols; i++) {
switch (db.tables[t].cols[i].type) {
case DBF_INT:
dbftype = FTInteger;
break;
case DBF_CHAR:
dbftype = FTString;
break;
case DBF_DOUBLE:
dbftype = FTDouble;
break;
}
width = db.tables[t].cols[i].width;
decimals = db.tables[t].cols[i].decimals;
DBFAddField(dbf, db.tables[t].cols[i].name, dbftype, width, decimals);
}
G_debug(2, "Write %d rows", nrows);
rec = 0;
for (i = 0; i < nrows; i++) {
if (rows[i].alive == FALSE)
continue;
for (j = 0; j < ncols; j++) {
field = j;
val = &(rows[i].values[j]);
if (val->is_null) {
DBFWriteNULLAttribute(dbf, rec, field);
}
else {
switch (db.tables[t].cols[j].type) {
case DBF_INT:
ret = DBFWriteIntegerAttribute(dbf, rec, field, val->i);
break;
case DBF_CHAR:
if (val->c != NULL)
ret =
DBFWriteStringAttribute(dbf, rec, field, val->c);
else
ret = DBFWriteStringAttribute(dbf, rec, field, "");
break;
case DBF_DOUBLE:
ret = DBFWriteDoubleAttribute(dbf, rec, field, val->d);
break;
}
}
}
rec++;
}
G_debug(2, "Written %d records", rec);
DBFClose(dbf);
/* Copy */
if (G_rename_file(name, db.tables[t].file)) {
append_error("Cannot move %s\nto %s\n", name, db.tables[t].file);
return DB_FAILED;
};
return DB_OK;
}
