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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 2005, 2015 Oracle and/or its affiliates. All rights reserved.
*
* $Id$
*/
// File: excxx_example_database_load.cpp
#include <iostream>
#include <fstream>
#include <cstdlib>
#include "MyDb.hpp"
#include "gettingStartedCommon.hpp"
#ifdef _WIN32
extern "C" {
extern int getopt(int, char * const *, const char *);
extern char *optarg;
}
#else
#include <unistd.h>
#endif
// Forward declarations
void loadInventoryDB(MyDb &, std::string &);
void loadVendorDB(MyDb &, std::string &);
using namespace std;
int
usage()
{
std::cout << "example_database_load [-b <path to data files>]"
<< " [-h <database home directory>]" << std::endl;
std::cout << "Note: If -b -h is specified, then the path must end"
<< " with your system's path delimiter (/ or \\)"
<< std::endl;
return (-1);
}
// Loads the contents of vendors.txt and inventory.txt into
// Berkeley DB databases.
int
main (int argc, char *argv[])
{
int ch;
char lastChar;
// Initialize the path to the database files
std::string basename("./");
std::string databaseHome("./");
// Database names
std::string vDbName("vendordb.db");
std::string iDbName("inventorydb.db");
std::string itemSDbName("itemname.sdb");
// Parse the command line arguments
while ((ch = getopt(argc, argv, "b:h:")) != EOF)
switch (ch) {
case 'h':
databaseHome = optarg;
lastChar = databaseHome[databaseHome.size() -1];
if (lastChar != '/' && lastChar != '\\')
return (usage());
break;
case 'b':
basename = optarg;
lastChar = basename[basename.size() -1];
if (lastChar != '/' && lastChar != '\\')
return (usage());
break;
case '?':
default:
return (usage());
break;
}
// Identify the full name for our input files, which should
// also include some path information.
std::string inventoryFile = basename + "inventory.txt";
std::string vendorFile = basename + "vendors.txt";
try
{
// Open all databases.
MyDb inventoryDB(databaseHome, iDbName);
MyDb vendorDB(databaseHome, vDbName);
MyDb itemnameSDB(databaseHome, itemSDbName, true);
// Associate the primary and the secondary
inventoryDB.getDb().associate(NULL,
&(itemnameSDB.getDb()),
get_item_name,
0);
// Load the inventory database
loadInventoryDB(inventoryDB, inventoryFile);
// Load the vendor database
loadVendorDB(vendorDB, vendorFile);
} catch(DbException &e) {
std::cerr << "Error loading databases. " << std::endl;
std::cerr << e.what() << std::endl;
return (e.get_errno());
} catch(std::exception &e) {
std::cerr << "Error loading databases. " << std::endl;
std::cerr << e.what() << std::endl;
return (-1);
}
// MyDb class constructors will close the databases when they
// go out of scope.
return (0);
} // End main
// Used to locate the first pound sign (a field delimiter)
// in the input string.
size_t
getNextPound(std::string &theString, std::string &substring)
{
size_t pos = theString.find("#");
substring.assign(theString, 0, pos);
theString.assign(theString, pos + 1, theString.size());
return (pos);
}
// Loads the contents of the inventory.txt file into a database
void
loadInventoryDB(MyDb &inventoryDB, std::string &inventoryFile)
{
InventoryData inventoryData;
std::string substring;
size_t nextPound;
std::ifstream inFile(inventoryFile.c_str(), std::ios::in);
if ( !inFile )
{
std::cerr << "Could not open file '" << inventoryFile
<< "'. Giving up." << std::endl;
throw std::exception();
}
while (!inFile.eof())
{
inventoryData.clear();
std::string stringBuf;
std::getline(inFile, stringBuf);
// Now parse the line
if (!stringBuf.empty())
{
nextPound = getNextPound(stringBuf, substring);
inventoryData.setName(substring);
nextPound = getNextPound(stringBuf, substring);
inventoryData.setSKU(substring);
nextPound = getNextPound(stringBuf, substring);
inventoryData.setPrice(strtod(substring.c_str(), 0));
nextPound = getNextPound(stringBuf, substring);
inventoryData.setQuantity(strtol(substring.c_str(), 0, 10));
nextPound = getNextPound(stringBuf, substring);
inventoryData.setCategory(substring);
nextPound = getNextPound(stringBuf, substring);
inventoryData.setVendor(substring);
void *buff = (void *)inventoryData.getSKU().c_str();
size_t size = inventoryData.getSKU().size()+1;
Dbt key(buff, (u_int32_t)size);
buff = inventoryData.getBuffer();
size = inventoryData.getBufferSize();
Dbt data(buff, (u_int32_t)size);
inventoryDB.getDb().put(NULL, &key, &data, 0);
}
}
inFile.close();
}
// Loads the contents of the vendors.txt file into a database
void
loadVendorDB(MyDb &vendorDB, std::string &vendorFile)
{
std::ifstream inFile(vendorFile.c_str(), std::ios::in);
if ( !inFile )
{
std::cerr << "Could not open file '" << vendorFile
<< "'. Giving up." << std::endl;
throw std::exception();
}
VENDOR my_vendor;
while (!inFile.eof())
{
std::string stringBuf;
std::getline(inFile, stringBuf);
memset(&my_vendor, 0, sizeof(VENDOR));
// Scan the line into the structure.
// Convenient, but not particularly safe.
// In a real program, there would be a lot more
// defensive code here.
sscanf(stringBuf.c_str(),
"%20[^#]#%20[^#]#%20[^#]#%3[^#]#%6[^#]#%13[^#]#%20[^#]#%20[^\n]",
my_vendor.name, my_vendor.street,
my_vendor.city, my_vendor.state,
my_vendor.zipcode, my_vendor.phone_number,
my_vendor.sales_rep, my_vendor.sales_rep_phone);
Dbt key(my_vendor.name, (u_int32_t)strlen(my_vendor.name) + 1);
Dbt data(&my_vendor, sizeof(VENDOR));
vendorDB.getDb().put(NULL, &key, &data, 0);
}
inFile.close();
}
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