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/* ----------------------------------------------------------------------- *
*
* Copyright 1996-2018 The NASM Authors - All Rights Reserved
* See the file AUTHORS included with the NASM distribution for
* the specific copyright holders.
*
* 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.
*
* 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.
*
* ----------------------------------------------------------------------- */
/*
* strlist.c - list of unique, ordered strings
*/
#include "strlist.h"
/*
* Create a string list
*/
struct strlist *strlist_alloc(void)
{
struct strlist *list = nasm_zalloc(sizeof(*list));
hash_init(&list->hash, HASH_MEDIUM);
list->tailp = &list->head;
return list;
}
/*
* Append a string to a string list if and only if it isn't
* already there. Return true if it was added.
*/
bool strlist_add(struct strlist *list, const char *str)
{
struct strlist_entry *e;
struct hash_insert hi;
size_t len;
if (!list)
return false;
if (hash_find(&list->hash, str, &hi))
return false;
len = strlen(str);
/* Structure already has char[1] as EOS */
e = nasm_zalloc(sizeof(*e) + len);
e->len = len;
memcpy(e->str, str, len + 1);
*list->tailp = e;
list->tailp = &e->next;
hash_add(&hi, e->str, (void *)e);
return true;
}
/*
* Free a string list
*/
void strlist_free(struct strlist *list)
{
if (list) {
hash_free_all(&list->hash, false);
nasm_free(list);
}
}
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