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/*
/ TextCsv.cpp
/ methods related to CSV/TXT loading
/
/ version 1.7, 2013 May 8
/
/ Author: Sandro Furieri a-furieri@lqt.it
/
/ Copyright (C) 2008-2013 Alessandro Furieri
/
/ 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, either version 3 of the License, or
/ (at your option) any later version.
/
/ 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, see <http://www.gnu.org/licenses/>.
/
*/
#include "Classdef.h"
#if defined(_WIN32) && !defined(__MINGW32__)
#define strcasecmp _stricmp
#endif
static void text_clean_integer(char *value)
{
/* cleaning an integer value */
char last;
char buffer[35536];
int len = strlen(value);
last = value[len - 1];
if (last == '-' || last == '+')
{
/* trailing sign; transforming into a leading sign */
*buffer = last;
strcpy(buffer + 1, value);
buffer[len - 1] = '\0';
strcpy(value, buffer);
}
}
static void text_clean_double(char *value)
{
/* cleaning an integer value */
char *p;
char last;
char buffer[35536];
int len = strlen(value);
last = value[len - 1];
if (last == '-' || last == '+')
{
/* trailing sign; transforming into a leading sign */
*buffer = last;
strcpy(buffer + 1, value);
buffer[len - 1] = '\0';
strcpy(value, buffer);
}
p = value;
while (*p != '\0')
{
/* transforming COMMAs into POINTs */
if (*p == ',')
*p = '.';
p++;
}
}
void
MyFrame::LoadText(wxString & path, wxString & table, wxString & charset,
bool first_titles, const char decimal_separator,
const char separator, const char text_separator)
{
//
// loading a CSV/TXT as a new DB table
//
gaiaTextReaderPtr text = NULL;
int seed;
int dup;
int idup;
char dummy[65536];
char dummyName[4096];
char **col_name = NULL;
int i;
char sql[65536];
int len;
int ret;
int rows = 0;
char *errMsg = NULL;
bool sqlError = false;
char xname[1024];
int current_row;
wxString msg;
char buf[4096];
int type;
const char *value;
//
// performing some checks before starting
//
if (TableAlreadyExists(table) == true)
{
wxMessageBox(wxT("a table named '") + table + wxT("' already exists"),
wxT("spatialite_gui"), wxOK | wxICON_ERROR, this);
return;
}
text = gaiaTextReaderAlloc(path.ToUTF8(), separator,
text_separator, decimal_separator,
first_titles, charset.ToUTF8());
if (text)
{
if (gaiaTextReaderParse(text) == 0)
{
gaiaTextReaderDestroy(text);
text = NULL;
}
}
if (!text)
return;
::wxBeginBusyCursor();
//
// checking for duplicate / illegal column names and antialising them
//
col_name = (char **) malloc(sizeof(char *) * text->max_fields);
seed = 0;
for (i = 0; i < text->max_fields; i++)
{
strcpy(dummyName, text->columns[i].name);
dup = 0;
for (idup = 0; idup < i; idup++)
{
if (strcasecmp(dummyName, *(col_name + idup)) == 0)
dup = 1;
}
if (strcasecmp(dummyName, "PK_UID") == 0)
dup = 1;
if (dup)
sprintf(dummyName, "DUPCOL_%d", seed++);
len = strlen(dummyName);
*(col_name + i) = (char *) malloc(len + 1);
strcpy(*(col_name + i), dummyName);
}
//
// starting a transaction
//
ret = sqlite3_exec(SqliteHandle, "BEGIN", NULL, 0, &errMsg);
if (ret != SQLITE_OK)
{
wxMessageBox(wxT("load CSV/TXT error:") + wxString::FromUTF8(errMsg),
wxT("spatialite_gui"), wxOK | wxICON_ERROR, this);
sqlite3_free(errMsg);
sqlError = true;
goto clean_up;
}
//
// creating the Table
//
strcpy(xname, table.ToUTF8());
DoubleQuotedSql(xname);
sprintf(sql, "CREATE TABLE %s", xname);
strcat(sql, " (\nPK_UID INTEGER PRIMARY KEY AUTOINCREMENT");
for (i = 0; i < text->max_fields; i++)
{
strcat(sql, ",\n");
strcpy(xname, *(col_name + i));
DoubleQuotedSql(xname);
strcat(sql, xname);
if (text->columns[i].type == VRTTXT_INTEGER)
strcat(sql, " INTEGER");
else if (text->columns[i].type == VRTTXT_DOUBLE)
strcat(sql, " DOUBLE");
else
strcat(sql, " TEXT");
}
strcat(sql, ")");
ret = sqlite3_exec(SqliteHandle, sql, NULL, 0, &errMsg);
if (ret != SQLITE_OK)
{
wxMessageBox(wxT("load text error:") + wxString::FromUTF8(errMsg),
wxT("spatialite_gui"), wxOK | wxICON_ERROR, this);
sqlite3_free(errMsg);
sqlError = true;
goto clean_up;
}
current_row = 0;
while (current_row < text->num_rows)
{
//
// inserting rows from CSV/TXT
//
if (!gaiaTextReaderGetRow(text, current_row))
break;
strcpy(xname, table.ToUTF8());
DoubleQuotedSql(xname);
sprintf(sql, "INSERT INTO %s (\nPK_UID", xname);
for (i = 0; i < text->max_fields; i++)
{
// columns corresponding to some CSV/TXT column
strcat(sql, ",");
strcpy(xname, *(col_name + i));
DoubleQuotedSql(xname);
strcat(sql, xname);
}
strcat(sql, ")\nVALUES (");
sprintf(dummy, "%d", current_row);
strcat(sql, dummy);
for (i = 0; i < text->max_fields; i++)
{
// column values
strcat(sql, ",");
if (!gaiaTextReaderFetchField(text, i, &type, &value))
strcat(sql, "NULL");
else
{
if (type == VRTTXT_INTEGER)
{
strcpy(buf, value);
text_clean_integer(buf);
#if defined(_WIN32) || defined(__MINGW32__)
/* CAVEAT - M$ runtime has non-standard functions for 64 bits */
sprintf(dummy, "%I64d", _atoi64(buf));
#else
sprintf(dummy, "%lld", atoll(buf));
#endif
strcat(sql, dummy);
} else if (type == VRTTXT_DOUBLE)
{
strcpy(buf, value);
text_clean_double(buf);
sprintf(dummy, "%1.6f", atof(buf));
strcat(sql, dummy);
} else if (type == VRTTXT_TEXT)
{
void *ptr = (void *) value;
strcpy(dummy, value);
free(ptr);
CleanSqlString(dummy);
strcat(sql, "'");
strcat(sql, dummy);
strcat(sql, "'");
} else
strcat(sql, "NULL");
}
}
strcat(sql, ")");
ret = sqlite3_exec(SqliteHandle, sql, NULL, 0, &errMsg);
if (ret != SQLITE_OK)
{
wxMessageBox(wxT("load text error:") + wxString::FromUTF8(errMsg),
wxT("spatialite_gui"), wxOK | wxICON_ERROR, this);
sqlite3_free(errMsg);
sqlError = true;
goto clean_up;
}
rows++;
current_row++;
}
clean_up:
if (col_name)
{
// releasing memory allocation for column names
for (i = 0; i < text->max_fields; i++)
free(*(col_name + i));
free(col_name);
}
gaiaTextReaderDestroy(text);
if (sqlError == true)
{
// some error occurred - ROLLBACK
ret = sqlite3_exec(SqliteHandle, "ROLLBACK", NULL, 0, &errMsg);
if (ret != SQLITE_OK)
{
wxMessageBox(wxT("load text error:") + wxString::FromUTF8(errMsg),
wxT("spatialite_gui"), wxOK | wxICON_ERROR, this);
sqlite3_free(errMsg);
}
::wxEndBusyCursor();
msg =
wxT("CSV/TXT not loaded\n\n\na ROLLBACK was automatically performed");
wxMessageBox(msg, wxT("spatialite_gui"), wxOK | wxICON_WARNING, this);
} else
{
// ok - confirming pending transaction - COMMIT
ret = sqlite3_exec(SqliteHandle, "COMMIT", NULL, 0, &errMsg);
if (ret != SQLITE_OK)
{
wxMessageBox(wxT("load text error:") + wxString::FromUTF8(errMsg),
wxT("spatialite_gui"), wxOK | wxICON_ERROR, this);
sqlite3_free(errMsg);
return;
}
::wxEndBusyCursor();
sprintf(dummy, "CSV/TXT loaded\n\n%d inserted rows", rows);
msg = wxString::FromUTF8(dummy);
wxMessageBox(msg, wxT("spatialite_gui"), wxOK | wxICON_INFORMATION, this);
InitTableTree();
}
}
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