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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* libdatrie - Double-Array Trie Library
* Copyright (C) 2006 Theppitak Karoonboonyanan <theppitak@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* dstring.c - Dynamic string type
* Created: 2012-08-01
* Author: Theppitak Karoonboonyanan <theppitak@gmail.com>
*/
#include "dstring.h"
#include "dstring-private.h"
#include "trie-private.h"
#include <string.h>
#include <stdlib.h>
DString *
dstring_new (int char_size, int n_elm)
{
DString *ds;
ds = (DString *) malloc (sizeof (DString));
if (UNLIKELY (!ds))
return NULL;
ds->alloc_size = char_size * n_elm;
ds->val = malloc (ds->alloc_size);
if (!ds->val) {
free (ds);
return NULL;
}
ds->char_size = char_size;
ds->str_len = 0;
return ds;
}
void
dstring_free (DString *ds)
{
free (ds->val);
free (ds);
}
int
dstring_length (const DString *ds)
{
return ds->str_len;
}
const void *
dstring_get_val (const DString *ds)
{
return ds->val;
}
void *
dstring_get_val_rw (DString *ds)
{
return ds->val;
}
void
dstring_clear (DString *ds)
{
ds->str_len = 0;
}
static Bool
dstring_ensure_space (DString *ds, int size)
{
if (ds->alloc_size < size) {
int re_size = MAX_VAL (ds->alloc_size * 2, size);
void *re_ptr = realloc (ds->val, re_size);
if (UNLIKELY (!re_ptr))
return FALSE;
ds->val = re_ptr;
ds->alloc_size = re_size;
}
return TRUE;
}
Bool
dstring_copy (DString *dst, const DString *src)
{
if (!dstring_ensure_space (dst, (src->str_len + 1) * src->char_size))
return FALSE;
memcpy (dst->val, src->val, (src->str_len + 1) * src->char_size);
dst->char_size = src->char_size;
dst->str_len = src->str_len;
return TRUE;
}
Bool
dstring_append (DString *dst, const DString *src)
{
if (dst->char_size != src->char_size)
return FALSE;
if (!dstring_ensure_space (dst, (dst->str_len + src->str_len + 1)
* dst->char_size))
{
return FALSE;
}
memcpy ((char *)dst->val + (dst->char_size * dst->str_len), src->val,
(src->str_len + 1) * dst->char_size);
dst->str_len += src->str_len;
return TRUE;
}
Bool
dstring_append_string (DString *ds, const void *data, int len)
{
if (!dstring_ensure_space (ds, (ds->str_len + len + 1) * ds->char_size))
return FALSE;
memcpy ((char *)ds->val + (ds->char_size * ds->str_len), data,
ds->char_size * len);
ds->str_len += len;
return TRUE;
}
Bool
dstring_append_char (DString *ds, const void *data)
{
if (!dstring_ensure_space (ds, (ds->str_len + 2) * ds->char_size))
return FALSE;
memcpy ((char *)ds->val + (ds->char_size * ds->str_len), data,
ds->char_size);
ds->str_len++;
return TRUE;
}
Bool
dstring_terminate (DString *ds)
{
if (!dstring_ensure_space (ds, (ds->str_len + 2) * ds->char_size))
return FALSE;
memset ((char *)ds->val + (ds->char_size * ds->str_len), 0, ds->char_size);
return TRUE;
}
Bool
dstring_cut_last (DString *ds)
{
if (0 == ds->str_len)
return FALSE;
ds->str_len--;
return TRUE;
}
/*
vi:ts=4:ai:expandtab
*/
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