122 lines
2.7 KiB
C
122 lines
2.7 KiB
C
/* $Id: mandoc_xr.c,v 1.3 2017/07/02 21:18:29 schwarze Exp $ */
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/*
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* Copyright (c) 2017 Ingo Schwarze <schwarze@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/types.h>
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#include <assert.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include "mandoc_aux.h"
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#include "mandoc_ohash.h"
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#include "mandoc_xr.h"
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static struct ohash *xr_hash = NULL;
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static struct mandoc_xr *xr_first = NULL;
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static struct mandoc_xr *xr_last = NULL;
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static void mandoc_xr_clear(void);
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static void
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mandoc_xr_clear(void)
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{
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struct mandoc_xr *xr;
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unsigned int slot;
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if (xr_hash == NULL)
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return;
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for (xr = ohash_first(xr_hash, &slot); xr != NULL;
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xr = ohash_next(xr_hash, &slot))
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free(xr);
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ohash_delete(xr_hash);
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}
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void
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mandoc_xr_reset(void)
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{
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if (xr_hash == NULL)
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xr_hash = mandoc_malloc(sizeof(*xr_hash));
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else
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mandoc_xr_clear();
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mandoc_ohash_init(xr_hash, 5,
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offsetof(struct mandoc_xr, hashkey));
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xr_first = xr_last = NULL;
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}
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int
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mandoc_xr_add(const char *sec, const char *name, int line, int pos)
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{
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struct mandoc_xr *xr, *oxr;
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const char *pend;
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size_t ssz, nsz, tsz;
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unsigned int slot;
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int ret;
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uint32_t hv;
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if (xr_hash == NULL)
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return 0;
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ssz = strlen(sec) + 1;
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nsz = strlen(name) + 1;
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tsz = ssz + nsz;
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xr = mandoc_malloc(sizeof(*xr) + tsz);
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xr->next = NULL;
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xr->sec = xr->hashkey;
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xr->name = xr->hashkey + ssz;
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xr->line = line;
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xr->pos = pos;
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xr->count = 1;
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memcpy(xr->sec, sec, ssz);
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memcpy(xr->name, name, nsz);
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pend = xr->hashkey + tsz;
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hv = ohash_interval(xr->hashkey, &pend);
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slot = ohash_lookup_memory(xr_hash, xr->hashkey, tsz, hv);
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if ((oxr = ohash_find(xr_hash, slot)) == NULL) {
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ohash_insert(xr_hash, slot, xr);
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if (xr_first == NULL)
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xr_first = xr;
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else
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xr_last->next = xr;
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xr_last = xr;
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return 0;
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}
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oxr->count++;
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ret = (oxr->line == -1) ^ (xr->line == -1);
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if (xr->line == -1)
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oxr->line = -1;
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free(xr);
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return ret;
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}
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struct mandoc_xr *
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mandoc_xr_get(void)
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{
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return xr_first;
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}
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void
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mandoc_xr_free(void)
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{
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mandoc_xr_clear();
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free(xr_hash);
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xr_hash = NULL;
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}
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