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/* SPDX-License-Identifier: BSD-2-Clause */
/* Copyright 1996-2020 The NASM Authors - All Rights Reserved */
/*
* strlist.c - list of ordered strings, optionally made unique
*/
#include "strlist.h"
/*
* Create a string list. The list can be uniqizing or not.
*/
struct strlist *strlist_alloc(bool uniq)
{
struct strlist *list = nasm_zalloc(sizeof(*list));
list->tailp = &list->head;
list->uniq = uniq;
return list;
}
/*
* Append a string to a string list. Return the entry pointer, which
* may be a pre-existing entry for a uniqizing list.
*/
static const struct strlist_entry *
strlist_add_common(struct strlist *list, struct strlist_entry *e,
struct hash_insert *hi)
{
e->offset = list->size;
e->next = NULL;
*list->tailp = e;
list->tailp = &e->next;
list->nstr++;
list->size += e->size;
if (list->uniq)
hash_add(hi, e->str, (void *)e);
return e;
}
const struct strlist_entry *
strlist_add(struct strlist *list, const char *str)
{
struct strlist_entry *e;
struct hash_insert hi;
size_t size;
prefetch(str);
if (!list)
return NULL;
size = strlen(str) + 1;
if (list->uniq) {
void **dp = hash_findb(&list->hash, str, size, &hi);
if (dp)
return *dp;
}
/* Structure already has char[1] as EOS */
e = nasm_malloc(sizeof(*e) - 1 + size);
e->size = size;
memcpy(e->str, str, size);
return strlist_add_common(list, e, &hi);
}
/*
* printf() to a string list
*/
const struct strlist_entry *
strlist_vprintf(struct strlist *list, const char *fmt, va_list ap)
{
/* clang miscompiles offsetin() unless e is initialized here */
struct strlist_entry *e = NULL;
struct hash_insert hi;
if (!list)
return NULL;
e = nasm_vaxprintf(offsetin(*e, str), fmt, ap);
e->size = nasm_last_string_size();
if (list->uniq) {
void **dp = hash_findb(&list->hash, e->str, e->size, &hi);
if (dp) {
nasm_free(e);
return *dp;
}
}
return strlist_add_common(list, e, &hi);
}
const struct strlist_entry *
strlist_printf(struct strlist *list, const char *fmt, ...)
{
va_list ap;
const struct strlist_entry *e;
va_start(ap, fmt);
e = strlist_vprintf(list, fmt, ap);
va_end(ap);
return e;
}
/*
* Free a string list. Sets the pointed to pointer to NULL.
*/
void strlist_free(struct strlist **listp)
{
struct strlist *list = *listp;
struct strlist_entry *e, *tmp;
if (!list)
return;
if (list->uniq)
hash_free(&list->hash);
list_for_each_safe(e, tmp, list->head)
nasm_free(e);
nasm_free(list);
*listp = NULL;
}
/*
* Search the string list for an entry. If found, return the entry pointer.
* Only possible on a uniqizing list.
*/
const struct strlist_entry *
strlist_find(const struct strlist *list, const char *str)
{
void **hf;
nasm_assert(list->uniq);
hf = hash_find((struct hash_table *)&list->hash, str, NULL);
return hf ? *hf : NULL;
}
/*
* Produce a linearized buffer containing the whole list, in order;
* The character "sep" is the separator between strings; this is
* typically either 0 or '\n'. strlist_size() will give the size of
* the returned buffer.
*/
void *strlist_linearize(const struct strlist *list, char sep)
{
const struct strlist_entry *sl;
char *buf = nasm_malloc(list->size);
char *p = buf;
strlist_for_each(sl, list) {
p = mempcpy(p, sl->str, sl->size);
p[-1] = sep;
}
return buf;
}
/*
* Output a string list to a file. The separator can be any string.
*/
void strlist_write(const struct strlist *list, const char *sep, FILE *f)
{
const struct strlist_entry *sl;
size_t seplen = strlen(sep);
strlist_for_each(sl, list) {
fwrite(sl->str, 1, sl->size - 1, f);
fwrite(sep, 1, seplen, f);
}
}
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