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Diffstat (limited to 'examples/c/ex_scope.c')
| -rw-r--r-- | examples/c/ex_scope.c | 217 |
1 files changed, 0 insertions, 217 deletions
diff --git a/examples/c/ex_scope.c b/examples/c/ex_scope.c deleted file mode 100644 index 795ad85d57b..00000000000 --- a/examples/c/ex_scope.c +++ /dev/null @@ -1,217 +0,0 @@ -/*- - * 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_scope.c - * demonstrates the scope of buffers holding cursor keys and values. - */ -#include <errno.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> - -#include <wiredtiger.h> - -#ifdef _WIN32 -/* snprintf is not supported on <= VS2013 */ -#define snprintf _snprintf -#endif - -static const char *home; - -static int -cursor_scope_ops(WT_CURSOR *cursor) -{ - struct { - const char *op; - const char *key; - const char *value; - int (*apply)(WT_CURSOR *); - } *op, ops[] = { - { "insert", "key1", "value1", cursor->insert, }, - { "update", "key1", "value2", cursor->update, }, - { "search", "key1", "value2", cursor->search, }, - { "remove", "key1", "value2", cursor->remove, }, - { NULL, NULL, NULL, NULL } - }; - WT_SESSION *session; - const char *key, *value; - char keybuf[10], valuebuf[10]; - int ret; - - session = cursor->session; - - for (op = ops; op->key != NULL; op++) { - key = value = NULL; - - /*! [cursor scope operation] */ - (void)snprintf(keybuf, sizeof(keybuf), "%s", op->key); - cursor->set_key(cursor, keybuf); - (void)snprintf(valuebuf, sizeof(valuebuf), "%s", op->value); - cursor->set_value(cursor, valuebuf); - - /* - * The application must keep key and value memory valid until - * the next operation that positions the cursor, modifies the - * data, or resets or closes the cursor. - * - * Modifying either the key or value buffers is not permitted. - */ - - /* Apply the operation (insert, update, search or remove). */ - if ((ret = op->apply(cursor)) != 0) { - fprintf(stderr, - "%s: error performing the operation: %s\n", - op->op, session->strerror(session, ret)); - return (ret); - } - - /* - * The cursor no longer references application memory, so - * application buffers can be safely overwritten. - */ - strcpy(keybuf, "no key"); - strcpy(valuebuf, "no value"); - - /* - * Check that get_key/value behave as expected after the - * operation. - */ - if (op->apply == cursor->insert) { - /* - * WT_CURSOR::insert no longer references application - * memory, but as it does not position the cursor, it - * doesn't reference memory owned by the cursor, either. - */ - printf("ex_scope: " - "expect two WiredTiger error messages:\n"); - if ((ret = cursor->get_key(cursor, &key)) == 0 || - (ret = cursor->get_value(cursor, &value)) == 0) { - fprintf(stderr, - "%s: error in get_key/value: %s\n", - op->op, session->strerror(session, ret)); - return (ret); - } - continue; - } - if (op->apply == cursor->remove) { - /* - * WT_CURSOR::remove no longer references application - * memory; as it does not position the cursor, it will - * reference key memory owned by the cursor, but has no - * value. - */ - printf("ex_scope: " - "expect one WiredTiger error message:\n"); - if ((ret = cursor->get_key(cursor, &key)) != 0 || - (ret = cursor->get_value(cursor, &value)) == 0) { - fprintf(stderr, - "%s: error in get_key/value: %s\n", - op->op, session->strerror(session, ret)); - return (ret); - } - } else /* search, update */{ - /* - * WT_CURSOR::search and WT_CURSOR::update no longer - * reference application memory; as they position the - * cursor, they will reference key/value memory owned - * by the cursor. - */ - if ((ret = cursor->get_key(cursor, &key)) != 0 || - (ret = cursor->get_value(cursor, &value)) != 0) { - fprintf(stderr, - "%s: error in get_key/value: %s\n", - op->op, session->strerror(session, ret)); - return (ret); - } - } - - /* - * Modifying the memory referenced by either key or value is - * not permitted. - * - * Check that the cursor's key and value are what we expect. - */ - if (key == keybuf || - (op->apply != cursor->remove && value == valuebuf)) { - fprintf(stderr, - "%s: cursor points at application memory!\n", - op->op); - return (EINVAL); - } - - if (strcmp(key, op->key) != 0 || - (op->apply != cursor->remove && - strcmp(value, op->value) != 0)) { - fprintf(stderr, - "%s: unexpected key / value!\n", op->op); - return (EINVAL); - } - /*! [cursor scope operation] */ - } - - return (0); -} - -int -main(void) -{ - WT_CONNECTION *conn; - WT_CURSOR *cursor; - WT_SESSION *session; - int ret; - - /* - * Create a clean test directory for this run of the test program if the - * environment variable isn't already set (as is done by make check). - */ - if (getenv("WIREDTIGER_HOME") == NULL) { - home = "WT_HOME"; - ret = system("rm -rf WT_HOME && mkdir WT_HOME"); - } else - home = NULL; - - /* Open a connection, create a simple table, open a cursor. */ - if ((ret = wiredtiger_open(home, NULL, "create", &conn)) != 0 || - (ret = conn->open_session(conn, NULL, NULL, &session)) != 0) { - fprintf(stderr, "Error connecting to %s: %s\n", - home == NULL ? "." : home, wiredtiger_strerror(ret)); - return (EXIT_FAILURE); - } - - ret = session->create(session, - "table:scope", "key_format=S,value_format=S,columns=(k,v)"); - - ret = session->open_cursor(session, - "table:scope", NULL, NULL, &cursor); - - ret = cursor_scope_ops(cursor); - - /* Close the connection and clean up. */ - ret = conn->close(conn, NULL); - - return (ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE); -} |