mirror of
https://github.com/netwide-assembler/nasm.git
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91 lines
2.6 KiB
C
91 lines
2.6 KiB
C
/* ----------------------------------------------------------------------- *
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*
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* Copyright 1996-2018 The NASM Authors - All Rights Reserved
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* See the file AUTHORS included with the NASM distribution for
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* the specific copyright holders.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following
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* conditions are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* ----------------------------------------------------------------------- */
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/*
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* strlist.c - list of unique, ordered strings
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*/
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#include "strlist.h"
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/*
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* Create a string list
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*/
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struct strlist *strlist_alloc(void)
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{
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struct strlist *list = nasm_zalloc(sizeof(*list));
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hash_init(&list->hash, HASH_MEDIUM);
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list->tailp = &list->head;
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return list;
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}
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/*
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* Append a string to a string list if and only if it isn't
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* already there. Return true if it was added.
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*/
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bool strlist_add(struct strlist *list, const char *str)
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{
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struct strlist_entry *e;
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struct hash_insert hi;
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size_t len;
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if (!list)
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return false;
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if (hash_find(&list->hash, str, &hi))
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return false;
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len = strlen(str);
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/* Structure already has char[1] as EOS */
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e = nasm_zalloc(sizeof(*e) + len);
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e->len = len;
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memcpy(e->str, str, len + 1);
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*list->tailp = e;
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list->tailp = &e->next;
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hash_add(&hi, e->str, (void *)e);
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return true;
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}
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/*
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* Free a string list
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*/
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void strlist_free(struct strlist *list)
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{
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if (list) {
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hash_free_all(&list->hash, false);
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nasm_free(list);
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}
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}
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