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Annotation of mandoc/mandoc_xr.c, Revision 1.4

1.4     ! schwarze    1: /* $Id: mandoc_xr.c,v 1.3 2017/07/02 21:18:29 schwarze Exp $ */
1.1       schwarze    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:  */
1.4     ! schwarze   17: #include "config.h"
        !            18:
1.1       schwarze   19: #include <sys/types.h>
                     20:
                     21: #include <assert.h>
                     22: #include <stddef.h>
                     23: #include <stdint.h>
                     24: #include <stdlib.h>
                     25: #include <string.h>
                     26:
                     27: #include "mandoc_aux.h"
                     28: #include "mandoc_ohash.h"
                     29: #include "mandoc_xr.h"
                     30:
                     31: static struct ohash     *xr_hash = NULL;
                     32: static struct mandoc_xr         *xr_first = NULL;
                     33: static struct mandoc_xr         *xr_last = NULL;
                     34:
                     35: static void              mandoc_xr_clear(void);
                     36:
                     37:
                     38: static void
                     39: mandoc_xr_clear(void)
                     40: {
                     41:        struct mandoc_xr        *xr;
                     42:        unsigned int             slot;
                     43:
                     44:        if (xr_hash == NULL)
                     45:                return;
                     46:        for (xr = ohash_first(xr_hash, &slot); xr != NULL;
                     47:             xr = ohash_next(xr_hash, &slot))
                     48:                free(xr);
                     49:        ohash_delete(xr_hash);
                     50: }
                     51:
                     52: void
                     53: mandoc_xr_reset(void)
                     54: {
                     55:        if (xr_hash == NULL)
                     56:                xr_hash = mandoc_malloc(sizeof(*xr_hash));
                     57:        else
                     58:                mandoc_xr_clear();
                     59:        mandoc_ohash_init(xr_hash, 5,
                     60:            offsetof(struct mandoc_xr, hashkey));
                     61:        xr_first = xr_last = NULL;
                     62: }
                     63:
1.2       schwarze   64: int
1.1       schwarze   65: mandoc_xr_add(const char *sec, const char *name, int line, int pos)
                     66: {
1.2       schwarze   67:        struct mandoc_xr         *xr, *oxr;
1.1       schwarze   68:        const char               *pend;
                     69:        size_t                    ssz, nsz, tsz;
                     70:        unsigned int              slot;
1.2       schwarze   71:        int                       ret;
1.1       schwarze   72:        uint32_t                  hv;
                     73:
                     74:        if (xr_hash == NULL)
1.2       schwarze   75:                return 0;
1.1       schwarze   76:
                     77:        ssz = strlen(sec) + 1;
                     78:        nsz = strlen(name) + 1;
                     79:        tsz = ssz + nsz;
                     80:        xr = mandoc_malloc(sizeof(*xr) + tsz);
                     81:        xr->next = NULL;
                     82:        xr->sec = xr->hashkey;
                     83:        xr->name = xr->hashkey + ssz;
                     84:        xr->line = line;
                     85:        xr->pos = pos;
1.3       schwarze   86:        xr->count = 1;
1.1       schwarze   87:        memcpy(xr->sec, sec, ssz);
                     88:        memcpy(xr->name, name, nsz);
                     89:
                     90:        pend = xr->hashkey + tsz;
                     91:        hv = ohash_interval(xr->hashkey, &pend);
                     92:        slot = ohash_lookup_memory(xr_hash, xr->hashkey, tsz, hv);
1.2       schwarze   93:        if ((oxr = ohash_find(xr_hash, slot)) == NULL) {
1.1       schwarze   94:                ohash_insert(xr_hash, slot, xr);
                     95:                if (xr_first == NULL)
                     96:                        xr_first = xr;
                     97:                else
                     98:                        xr_last->next = xr;
                     99:                xr_last = xr;
1.2       schwarze  100:                return 0;
                    101:        }
                    102:
1.3       schwarze  103:        oxr->count++;
1.2       schwarze  104:        ret = (oxr->line == -1) ^ (xr->line == -1);
                    105:        if (xr->line == -1)
                    106:                oxr->line = -1;
                    107:        free(xr);
                    108:        return ret;
1.1       schwarze  109: }
                    110:
                    111: struct mandoc_xr *
                    112: mandoc_xr_get(void)
                    113: {
                    114:        return xr_first;
                    115: }
                    116:
                    117: void
                    118: mandoc_xr_free(void)
                    119: {
                    120:        mandoc_xr_clear();
                    121:        free(xr_hash);
                    122:        xr_hash = NULL;
                    123: }