Annotation of mandoc/mandoc_xr.c, Revision 1.1
1.1 ! schwarze 1: /* $Id$ */
! 2: /*
! 3: * Copyright (c) 2017 Ingo Schwarze <schwarze@openbsd.org>
! 4: *
! 5: * Permission to use, copy, modify, and distribute this software for any
! 6: * purpose with or without fee is hereby granted, provided that the above
! 7: * copyright notice and this permission notice appear in all copies.
! 8: *
! 9: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
! 10: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
! 11: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
! 12: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
! 13: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
! 14: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
! 15: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
! 16: */
! 17: #include <sys/types.h>
! 18:
! 19: #include <assert.h>
! 20: #include <stddef.h>
! 21: #include <stdint.h>
! 22: #include <stdlib.h>
! 23: #include <string.h>
! 24:
! 25: #include "mandoc_aux.h"
! 26: #include "mandoc_ohash.h"
! 27: #include "mandoc_xr.h"
! 28:
! 29: static struct ohash *xr_hash = NULL;
! 30: static struct mandoc_xr *xr_first = NULL;
! 31: static struct mandoc_xr *xr_last = NULL;
! 32:
! 33: static void mandoc_xr_clear(void);
! 34:
! 35:
! 36: static void
! 37: mandoc_xr_clear(void)
! 38: {
! 39: struct mandoc_xr *xr;
! 40: unsigned int slot;
! 41:
! 42: if (xr_hash == NULL)
! 43: return;
! 44: for (xr = ohash_first(xr_hash, &slot); xr != NULL;
! 45: xr = ohash_next(xr_hash, &slot))
! 46: free(xr);
! 47: ohash_delete(xr_hash);
! 48: }
! 49:
! 50: void
! 51: mandoc_xr_reset(void)
! 52: {
! 53: if (xr_hash == NULL)
! 54: xr_hash = mandoc_malloc(sizeof(*xr_hash));
! 55: else
! 56: mandoc_xr_clear();
! 57: mandoc_ohash_init(xr_hash, 5,
! 58: offsetof(struct mandoc_xr, hashkey));
! 59: xr_first = xr_last = NULL;
! 60: }
! 61:
! 62: void
! 63: mandoc_xr_add(const char *sec, const char *name, int line, int pos)
! 64: {
! 65: struct mandoc_xr *xr;
! 66: const char *pend;
! 67: size_t ssz, nsz, tsz;
! 68: unsigned int slot;
! 69: uint32_t hv;
! 70:
! 71: if (xr_hash == NULL)
! 72: return;
! 73:
! 74: ssz = strlen(sec) + 1;
! 75: nsz = strlen(name) + 1;
! 76: tsz = ssz + nsz;
! 77: xr = mandoc_malloc(sizeof(*xr) + tsz);
! 78: xr->next = NULL;
! 79: xr->sec = xr->hashkey;
! 80: xr->name = xr->hashkey + ssz;
! 81: xr->line = line;
! 82: xr->pos = pos;
! 83: memcpy(xr->sec, sec, ssz);
! 84: memcpy(xr->name, name, nsz);
! 85:
! 86: pend = xr->hashkey + tsz;
! 87: hv = ohash_interval(xr->hashkey, &pend);
! 88: slot = ohash_lookup_memory(xr_hash, xr->hashkey, tsz, hv);
! 89: if (ohash_find(xr_hash, slot) == NULL) {
! 90: ohash_insert(xr_hash, slot, xr);
! 91: if (xr_first == NULL)
! 92: xr_first = xr;
! 93: else
! 94: xr_last->next = xr;
! 95: xr_last = xr;
! 96: } else
! 97: free(xr);
! 98: }
! 99:
! 100: struct mandoc_xr *
! 101: mandoc_xr_get(void)
! 102: {
! 103: return xr_first;
! 104: }
! 105:
! 106: void
! 107: mandoc_xr_free(void)
! 108: {
! 109: mandoc_xr_clear();
! 110: free(xr_hash);
! 111: xr_hash = NULL;
! 112: }
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