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/*-
* Public Domain 2014-2015 MongoDB, Inc.
* Public Domain 2008-2014 WiredTiger, Inc.
*
* This is free and unencumbered software released into the public domain.
*
* Anyone is free to copy, modify, publish, use, compile, sell, or
* distribute this software, either in source code form or as a compiled
* binary, for any purpose, commercial or non-commercial, and by any
* means.
*
* In jurisdictions that recognize copyright laws, the author or authors
* of this software dedicate any and all copyright interest in the
* software to the public domain. We make this dedication for the benefit
* of the public at large and to the detriment of our heirs and
* successors. We intend this dedication to be an overt act of
* relinquishment in perpetuity of all present and future rights to this
* software under copyright law.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* ex_config_parse.c
* This is an example demonstrating how to parse WiredTiger compatible
* configuration strings.
*/
#include <stdio.h>
#include <string.h>
#include <wiredtiger.h>
int
main(void)
{
int ret;
/*! [Create a configuration parser] */
WT_CONFIG_ITEM k, v;
WT_CONFIG_PARSER *parser;
const char *config_string =
"path=/dev/loop,page_size=1024,log=(archive=true,file_max=20MB)";
if ((ret = wiredtiger_config_parser_open(
NULL, config_string, strlen(config_string), &parser)) != 0) {
fprintf(stderr, "Error creating configuration parser: %s\n",
wiredtiger_strerror(ret));
return (ret);
}
if ((ret = parser->close(parser)) != 0) {
fprintf(stderr, "Error closing configuration parser: %s\n",
wiredtiger_strerror(ret));
return (ret);
}
/*! [Create a configuration parser] */
if ((ret = wiredtiger_config_parser_open(
NULL, config_string, strlen(config_string), &parser)) != 0) {
fprintf(stderr, "Error creating configuration parser: %s\n",
wiredtiger_strerror(ret));
return (ret);
}
{
/*! [get] */
int64_t my_page_size;
/*
* Retrieve the value of the integer configuration string "page_size".
*/
if ((ret = parser->get(parser, "page_size", &v)) != 0) {
fprintf(stderr,
"page_size configuration: %s", wiredtiger_strerror(ret));
return (ret);
}
my_page_size = v.val;
/*! [get] */
ret = parser->close(parser);
(void)my_page_size;
}
{
if ((ret = wiredtiger_config_parser_open(
NULL, config_string, strlen(config_string), &parser)) != 0) {
fprintf(stderr, "Error creating configuration parser: %s\n",
wiredtiger_strerror(ret));
return (ret);
}
/*! [next] */
/*
* Retrieve and print the values of the configuration strings.
*/
while ((ret = parser->next(parser, &k, &v)) == 0) {
printf("%.*s:", (int)k.len, k.str);
if (v.type == WT_CONFIG_ITEM_NUM)
printf("%d\n", (int)v.val);
else
printf("%.*s\n", (int)v.len, v.str);
}
/*! [next] */
ret = parser->close(parser);
}
if ((ret = wiredtiger_config_parser_open(
NULL, config_string, strlen(config_string), &parser)) != 0) {
fprintf(stderr, "Error creating configuration parser: %s\n",
wiredtiger_strerror(ret));
return (ret);
}
/*! [nested get] */
/*
* Retrieve the value of the nested log file_max configuration string
* using dot shorthand. Utilize the configuration parsing automatic
* conversion of value strings into an integer.
*/
v.type = WT_CONFIG_ITEM_NUM;
if ((ret = parser->get(parser, "log.file_max", &v)) != 0) {
fprintf(stderr,
"log.file_max configuration: %s", wiredtiger_strerror(ret));
return (ret);
}
printf("log file max: %d\n", (int)v.val);
/*! [nested get] */
ret = parser->close(parser);
if ((ret = wiredtiger_config_parser_open(
NULL, config_string, strlen(config_string), &parser)) != 0) {
fprintf(stderr, "Error creating configuration parser: %s\n",
wiredtiger_strerror(ret));
return (ret);
}
/*! [nested traverse] */
{
WT_CONFIG_PARSER *sub_parser;
while ((ret = parser->next(parser, &k, &v)) == 0) {
if (v.type == WT_CONFIG_ITEM_STRUCT) {
printf("Found nested configuration: %.*s\n",
(int)k.len, k.str);
if ((ret = wiredtiger_config_parser_open(
NULL, v.str, v.len, &sub_parser)) != 0) {
fprintf(stderr,
"Error creating nested configuration "
"parser: %s\n",
wiredtiger_strerror(ret));
ret = parser->close(parser);
return (ret);
}
while ((ret = sub_parser->next(
sub_parser, &k, &v)) == 0)
printf("\t%.*s\n", (int)k.len, k.str);
ret = sub_parser->close(sub_parser);
}
}
/*! [nested traverse] */
ret = parser->close(parser);
}
return (ret);
}
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