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Diffstat (limited to 'src/third_party/wiredtiger/examples/c/ex_config_parse.c')
| -rw-r--r-- | src/third_party/wiredtiger/examples/c/ex_config_parse.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/src/third_party/wiredtiger/examples/c/ex_config_parse.c b/src/third_party/wiredtiger/examples/c/ex_config_parse.c new file mode 100644 index 00000000000..124eff21130 --- /dev/null +++ b/src/third_party/wiredtiger/examples/c/ex_config_parse.c @@ -0,0 +1,166 @@ +/*- + * Public Domain 2014-2016 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); +} |