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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 2006-2009 Oracle. All rights reserved.
*
* $Id$
*/
#include <stdlib.h>
#include <string.h>
#ifndef _WIN32
#include <unistd.h>
#endif
#include <db.h>
#ifdef _WIN32
extern int getopt(int, char * const *, const char *);
#endif
#define CACHESIZE (10 * 1024 * 1024)
#define DATABASE "quote.db"
const char *progname = "ex_rep_gsg_simple";
int create_env(const char *, DB_ENV **);
int env_init(DB_ENV *, const char *);
int doloop (DB_ENV *);
int print_stocks(DB *);
static void
usage()
{
fprintf(stderr, "usage: %s ", progname);
fprintf(stderr, "-h home\n");
exit(EXIT_FAILURE);
}
int
main(int argc, char *argv[])
{
extern char *optarg;
DB_ENV *dbenv;
const char *home;
char ch;
int ret;
dbenv = NULL;
ret = 0;
home = NULL;
/* Create and configure the environment handle. */
if ((ret = create_env(progname, &dbenv)) != 0)
goto err;
/* Collect the command line options. */
while ((ch = getopt(argc, argv, "h:")) != EOF)
switch (ch) {
case 'h':
home = optarg;
break;
case '?':
default:
usage();
}
/* Error check command line. */
if (home == NULL)
usage();
/* Open the environment. */
if ((ret = env_init(dbenv, home)) != 0)
goto err;
if ((ret = doloop(dbenv)) != 0) {
dbenv->err(dbenv, ret, "Application failed");
goto err;
}
err: if (dbenv != NULL)
(void)dbenv->close(dbenv, 0);
return (ret);
}
/* Create and configure an environment handle. */
int
create_env(const char *progname, DB_ENV **dbenvp)
{
DB_ENV *dbenv;
int ret;
if ((ret = db_env_create(&dbenv, 0)) != 0) {
fprintf(stderr, "can't create env handle: %s\n",
db_strerror(ret));
return (ret);
}
dbenv->set_errfile(dbenv, stderr);
dbenv->set_errpfx(dbenv, progname);
*dbenvp = dbenv;
return (0);
}
/* Open and configure an environment. */
int
env_init(DB_ENV *dbenv, const char *home)
{
u_int32_t flags;
int ret;
(void)dbenv->set_cachesize(dbenv, 0, CACHESIZE, 0);
(void)dbenv->set_flags(dbenv, DB_TXN_NOSYNC, 1);
flags = DB_CREATE |
DB_INIT_LOCK |
DB_INIT_LOG |
DB_INIT_MPOOL |
DB_INIT_TXN |
DB_RECOVER;
if ((ret = dbenv->open(dbenv, home, flags, 0)) != 0)
dbenv->err(dbenv, ret, "can't open environment");
return (ret);
}
/*
* Provides the main data processing function for our application.
* This function provides a command line prompt to which the user
* can provide a ticker string and a stock price. Once a value is
* entered to the application, the application writes the value to
* the database and then displays the entire database.
*/
#define BUFSIZE 1024
int
doloop(DB_ENV *dbenv)
{
DB *dbp;
DBT key, data;
char buf[BUFSIZE], *rbuf;
int ret;
u_int32_t db_flags;
dbp = NULL;
memset(&key, 0, sizeof(key));
memset(&data, 0, sizeof(data));
ret = 0;
for (;;) {
if (dbp == NULL) {
if ((ret = db_create(&dbp, dbenv, 0)) != 0)
return (ret);
db_flags = DB_AUTO_COMMIT | DB_CREATE;
if ((ret = dbp->open(dbp,
NULL, DATABASE, NULL, DB_BTREE, db_flags, 0)) != 0) {
dbenv->err(dbenv, ret, "DB->open");
goto err;
}
}
printf("QUOTESERVER> ");
fflush(stdout);
if (fgets(buf, sizeof(buf), stdin) == NULL)
break;
if (strtok(&buf[0], " \t\n") == NULL) {
switch ((ret = print_stocks(dbp))) {
case 0:
continue;
default:
dbp->err(dbp, ret, "Error traversing data");
goto err;
}
}
rbuf = strtok(NULL, " \t\n");
if (rbuf == NULL || rbuf[0] == '\0') {
if (strncmp(buf, "exit", 4) == 0 ||
strncmp(buf, "quit", 4) == 0)
break;
dbenv->errx(dbenv, "Format: TICKER VALUE");
continue;
}
key.data = buf;
key.size = (u_int32_t)strlen(buf);
data.data = rbuf;
data.size = (u_int32_t)strlen(rbuf);
if ((ret = dbp->put(dbp, NULL, &key, &data, 0)) != 0)
{
dbp->err(dbp, ret, "DB->put");
if (ret != DB_KEYEXIST)
goto err;
}
}
err: if (dbp != NULL)
(void)dbp->close(dbp, DB_NOSYNC);
return (ret);
}
/* Display all the stock quote information in the database. */
int
print_stocks(DB *dbp)
{
DBC *dbc;
DBT key, data;
#define MAXKEYSIZE 10
#define MAXDATASIZE 20
char keybuf[MAXKEYSIZE + 1], databuf[MAXDATASIZE + 1];
int ret, t_ret;
u_int32_t keysize, datasize;
if ((ret = dbp->cursor(dbp, NULL, &dbc, 0)) != 0) {
dbp->err(dbp, ret, "can't open cursor");
return (ret);
}
memset(&key, 0, sizeof(key));
memset(&data, 0, sizeof(data));
printf("\tSymbol\tPrice\n");
printf("\t======\t=====\n");
for (ret = dbc->c_get(dbc, &key, &data, DB_FIRST);
ret == 0;
ret = dbc->c_get(dbc, &key, &data, DB_NEXT)) {
keysize = key.size > MAXKEYSIZE ? MAXKEYSIZE : key.size;
memcpy(keybuf, key.data, keysize);
keybuf[keysize] = '\0';
datasize = data.size >= MAXDATASIZE ? MAXDATASIZE : data.size;
memcpy(databuf, data.data, datasize);
databuf[datasize] = '\0';
printf("\t%s\t%s\n", keybuf, databuf);
}
printf("\n");
fflush(stdout);
if ((t_ret = dbc->c_close(dbc)) != 0 && ret == 0)
ret = t_ret;
switch (ret) {
case 0:
case DB_NOTFOUND:
return (0);
default:
return (ret);
}
}
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