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-rw-r--r-- | htp/htp_table.h | 184 |
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diff --git a/htp/htp_table.h b/htp/htp_table.h new file mode 100644 index 0000000..70a1e9b --- /dev/null +++ b/htp/htp_table.h @@ -0,0 +1,184 @@ +/*************************************************************************** + * Copyright (c) 2009-2010 Open Information Security Foundation + * Copyright (c) 2010-2013 Qualys, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + + * - Neither the name of the Qualys, Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + ***************************************************************************/ + +/** + * @file + * @author Ivan Ristic <ivanr@webkreator.com> + */ + +#ifndef HTP_TABLE_H +#define HTP_TABLE_H + +#ifdef __cplusplus +extern "C" { +#endif + +typedef struct htp_table_t htp_table_t; + +/** + * Add a new element to the table. The key will be copied, and the copy + * managed by the table. The table keeps a pointer to the element. It is the + * callers responsibility to ensure the pointer remains valid. + * + * @param[in] table + * @param[in] key + * @param[in] element + * @return HTP_OK on success, HTP_ERROR on failure. + */ +htp_status_t htp_table_add(htp_table_t *table, const bstr *key, const void *element); + +/** + * Add a new element to the table. The key provided will be adopted and managed + * by the table. You should not keep a copy of the pointer to the key unless you're + * certain that the table will live longer that the copy. The table keeps a pointer + * to the element. It is the callers responsibility to ensure the pointer remains + * valid. + * + * @param[in] table + * @param[in] key + * @param[in] element + * @return HTP_OK on success, HTP_ERROR on failure. + */ +htp_status_t htp_table_addn(htp_table_t *table, const bstr *key, const void *element); + +/** + * Add a new element to the table. The key provided will be only referenced and the + * caller remains responsible to keep it alive until after the table is destroyed. The + * table keeps a pointer to the element. It is the callers responsibility to ensure + * the pointer remains valid. + * + * @param[in] table + * @param[in] key + * @param[in] element + * @return HTP_OK on success, HTP_ERROR on failure. + */ +htp_status_t htp_table_addk(htp_table_t *table, const bstr *key, const void *element); + +/** + * Remove all elements from the table. This function handles keys + * according to the active allocation strategy. If the elements need freeing, + * you need to free them before invoking this function. + * + * @param[in] table + */ +void htp_table_clear(htp_table_t *table); + +/** + * Remove all elements from the table without freeing any of the keys, even + * if the table is using an allocation strategy where keys belong to it. This + * function is useful if all the keys have been adopted by some other structure. + * + * @param[in] table + */ +void htp_table_clear_ex(htp_table_t *table); + +/** + * Create a new table structure. The table will grow automatically as needed, + * but you are required to provide a starting size. + * + * @param[in] size The starting size. + * @return Newly created table instance, or NULL on failure. + */ +htp_table_t *htp_table_create(size_t size); + +/** + * Destroy a table. This function handles the keys according to the active + * allocation strategy. If the elements need freeing, you need to free them + * before invoking this function. After the table has been destroyed, + * the pointer is set to NULL. + * + * @param[in] table + */ +void htp_table_destroy(htp_table_t *table); + +/** + * Destroy the given table, but don't free the keys. even if they are managed by + * the table. Use this method when the responsibility for the keys has been transferred + * elsewhere. After the table has been destroyed, the pointer is set to NULL. + * + * @param[in] table + */ +void htp_table_destroy_ex(htp_table_t *table); + +/** + * Retrieve the first element that matches the given bstr key. + * + * @param[in] table + * @param[in] key + * @return Matched element, or NULL if no elements match the key. + */ +void *htp_table_get(const htp_table_t *table, const bstr *key); + +/** + * Retrieve the first element that matches the given NUL-terminated key. + * + * @param[in] table + * @param[in] ckey + * @return Matched element, or NULL if no elements match the key. + */ +void *htp_table_get_c(const htp_table_t *table, const char *ckey); + +/** + * Retrieve key and element at the given index. + * + * @param[in] table + * @param[in] idx + * @param[in,out] key Pointer in which the key will be returned. Can be NULL. + * @return HTP_OK on success, HTP_ERROR on failure. + */ +void *htp_table_get_index(const htp_table_t *table, size_t idx, bstr **key); + +/** + * Retrieve table key defined by the provided pointer and length. + * + * @param[in] table + * @param[in] key + * @param[in] key_len + * @return Matched element, or NULL if no elements match the key. + */ +void *htp_table_get_mem(const htp_table_t *table, const void *key, size_t key_len); + +/** + * Return the size of the table. + * + * @param[in] table + * @return table size + */ +size_t htp_table_size(const htp_table_t *table); + +#ifdef __cplusplus +} +#endif + +#endif /* HTP_TABLE_H */ + |