eqn.c

   1 /*      $Id: eqn.c,v 1.3 2011/03/15 16:23:51 kristaps Exp $ */
   2 /*
   3  * Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
   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 #ifdef HAVE_CONFIG_H
  18 #include "config.h"
  19 #endif
  20
  21 #include <assert.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <time.h>
  26
  27 #include "mandoc.h"
  28 #include "roff.h"
  29 #include "libmandoc.h"
  30 #include "libroff.h"
  31
  32 /* ARGSUSED */
  33 enum rofferr
  34 eqn_read(struct eqn_node **epp, int ln, const char *p, int offs)
  35 {
  36         size_t           sz;
  37         struct eqn_node *ep;
  38
  39         if (0 == strcmp(p, ".EN")) {
  40                 *epp = NULL;
  41                 return(ROFF_EQN);
  42         }
  43
  44         ep = *epp;
  45
  46         sz = strlen(&p[offs]);
  47         ep->eqn.data = mandoc_realloc(ep->eqn.data, ep->eqn.sz + sz + 1);
  48         if (0 == ep->eqn.sz)
  49                 *ep->eqn.data = '\0';
  50
  51         ep->eqn.sz += sz;
  52         strlcat(ep->eqn.data, &p[offs], ep->eqn.sz + 1);
  53         return(ROFF_IGN);
  54 }
  55
  56 struct eqn_node *
  57 eqn_alloc(int pos, int line)
  58 {
  59         struct eqn_node *p;
  60
  61         p = mandoc_calloc(1, sizeof(struct eqn_node));
  62         p->eqn.line = line;
  63         p->eqn.pos = pos;
  64
  65         return(p);
  66 }
  67
  68 /* ARGSUSED */
  69 void
  70 eqn_end(struct eqn_node *e)
  71 {
  72
  73         /* Nothing to do. */
  74 }
  75
  76 void
  77 eqn_free(struct eqn_node *p)
  78 {
  79
  80         free(p->eqn.data);
  81         free(p);
  82 }