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/* $OpenBSD: mandoc_xr.c,v 1.3 2017/07/02 21:17:12 schwarze Exp $ */
/*
* Copyright (c) 2017 Ingo Schwarze <schwarze@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <assert.h>
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include "mandoc_aux.h"
#include "mandoc_ohash.h"
#include "mandoc_xr.h"
static struct ohash *xr_hash = NULL;
static struct mandoc_xr *xr_first = NULL;
static struct mandoc_xr *xr_last = NULL;
static void mandoc_xr_clear(void);
static void
mandoc_xr_clear(void)
{
struct mandoc_xr *xr;
unsigned int slot;
if (xr_hash == NULL)
return;
for (xr = ohash_first(xr_hash, &slot); xr != NULL;
xr = ohash_next(xr_hash, &slot))
free(xr);
ohash_delete(xr_hash);
}
void
mandoc_xr_reset(void)
{
if (xr_hash == NULL)
xr_hash = mandoc_malloc(sizeof(*xr_hash));
else
mandoc_xr_clear();
mandoc_ohash_init(xr_hash, 5,
offsetof(struct mandoc_xr, hashkey));
xr_first = xr_last = NULL;
}
int
mandoc_xr_add(const char *sec, const char *name, int line, int pos)
{
struct mandoc_xr *xr, *oxr;
const char *pend;
size_t ssz, nsz, tsz;
unsigned int slot;
int ret;
uint32_t hv;
if (xr_hash == NULL)
return 0;
ssz = strlen(sec) + 1;
nsz = strlen(name) + 1;
tsz = ssz + nsz;
xr = mandoc_malloc(sizeof(*xr) + tsz);
xr->next = NULL;
xr->sec = xr->hashkey;
xr->name = xr->hashkey + ssz;
xr->line = line;
xr->pos = pos;
xr->count = 1;
memcpy(xr->sec, sec, ssz);
memcpy(xr->name, name, nsz);
pend = xr->hashkey + tsz;
hv = ohash_interval(xr->hashkey, &pend);
slot = ohash_lookup_memory(xr_hash, xr->hashkey, tsz, hv);
if ((oxr = ohash_find(xr_hash, slot)) == NULL) {
ohash_insert(xr_hash, slot, xr);
if (xr_first == NULL)
xr_first = xr;
else
xr_last->next = xr;
xr_last = xr;
return 0;
}
oxr->count++;
ret = (oxr->line == -1) ^ (xr->line == -1);
if (xr->line == -1)
oxr->line = -1;
free(xr);
return ret;
}
struct mandoc_xr *
mandoc_xr_get(void)
{
return xr_first;
}
void
mandoc_xr_free(void)
{
mandoc_xr_clear();
free(xr_hash);
xr_hash = NULL;
}
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