+++ /dev/null
-/* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
- *
- * Libhashkit library
- *
- * Copyright (C) 2011-2012 Data Differential, http://datadifferential.com/
- *
- * 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.
- *
- * * The names of its contributors may not 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
- * OWNER 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.
- *
- */
-
-
-#include <libhashkit/common.h>
-
-#include <cassert>
-#include <cstring>
-
-#define HASHKIT_BLOCK_SIZE 1024
-
-struct hashkit_string_st {
- char *end;
- size_t current_size;
- char *string;
-};
-
-inline static bool _string_check(hashkit_string_st *string, size_t need)
-{
- if (need and need > (size_t)(string->current_size - (size_t)(string->end - string->string)))
- {
- size_t current_offset= (size_t) (string->end - string->string);
-
- /* This is the block multiplier. To keep it larger and surive division errors we must round it up */
- size_t adjust= (need - (size_t)(string->current_size - (size_t)(string->end - string->string))) / HASHKIT_BLOCK_SIZE;
- adjust++;
-
- size_t new_size= sizeof(char) * (size_t)((adjust * HASHKIT_BLOCK_SIZE) + string->current_size);
- /* Test for overflow */
- if (new_size < need)
- {
- return false;
- }
-
- char *new_value= (char*)realloc(string->string, new_size);
-
- if (new_value == NULL)
- {
- return false;
- }
-
- string->string= new_value;
- string->end= string->string + current_offset;
-
- string->current_size+= (HASHKIT_BLOCK_SIZE * adjust);
- }
-
- return true;
-}
-
-static inline void _init_string(hashkit_string_st *self)
-{
- self->current_size= 0;
- self->end= self->string= NULL;
-}
-
-hashkit_string_st *hashkit_string_create(size_t initial_size)
-{
- hashkit_string_st* self= (hashkit_string_st*)calloc(1, sizeof(hashkit_string_st));
-
- if (self)
- {
- if (_string_check(self, initial_size) == false)
- {
- free(self);
-
- return NULL;
- }
- }
-
- return self;
-}
-
-#if 0
-static bool hashkit_string_append_null(hashkit_string_st *string)
-{
- if (_string_check(string, 1) == false)
- {
- return false;
- }
-
- *string->end= 0;
-
- return true;
-}
-#endif
-
-bool hashkit_string_append_character(hashkit_string_st *string,
- char character)
-{
- if (_string_check(string, 1) == false)
- {
- return false;
- }
-
- *string->end= character;
- string->end++;
-
- return true;
-}
-
-bool hashkit_string_append(hashkit_string_st *string,
- const char *value, size_t length)
-{
- if (_string_check(string, length) == false)
- {
- return false;
- }
-
- assert(length <= string->current_size);
- assert(string->string);
- assert(string->end >= string->string);
-
- memcpy(string->end, value, length);
- string->end+= length;
-
- return true;
-}
-
-char *hashkit_string_c_copy(hashkit_string_st *string)
-{
- if (hashkit_string_length(string) == 0)
- {
- return NULL;
- }
-
- char *c_ptr= static_cast<char *>(malloc((hashkit_string_length(string)+1) * sizeof(char)));
- if (c_ptr == NULL)
- {
- return NULL;
- }
-
- memcpy(c_ptr, hashkit_string_c_str(string), hashkit_string_length(string));
- c_ptr[hashkit_string_length(string)]= 0;
-
- return c_ptr;
-}
-
-void hashkit_string_reset(hashkit_string_st *string)
-{
- string->end= string->string;
-}
-
-void hashkit_string_free(hashkit_string_st *ptr)
-{
- if (ptr == NULL)
- {
- return;
- }
-
- if (ptr->string)
- {
- free(ptr->string);
- }
- free(ptr);
-}
-
-bool hashkit_string_resize(hashkit_string_st& string, const size_t need)
-{
- return _string_check(&string, need);
-}
-
-size_t hashkit_string_length(const hashkit_string_st *self)
-{
- return size_t(self->end -self->string);
-}
-
-size_t hashkit_string_max_size(const hashkit_string_st *self)
-{
- return self->current_size;
-}
-
-char *hashkit_string_take(hashkit_string_st *self)
-{
- assert(self);
- if (self == NULL)
- {
- return NULL;
- }
- char *value= self->string;
-
- _init_string(self);
-
- return value;
-}
-
-char *hashkit_string_c_str_mutable(hashkit_string_st *self)
-{
- assert(self);
- if (self == NULL)
- {
- return NULL;
- }
- return self->string;
-}
-
-const char *hashkit_string_c_str(const hashkit_string_st* self)
-{
- assert(self);
- if (self == NULL)
- {
- return NULL;
- }
- return self->string;
-}
-
-void hashkit_string_set_length(hashkit_string_st *self, size_t length)
-{
- assert(self);
- if (self and _string_check(self, length))
- {
- self->end= self->string +length;
- }
-}
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