eqn.c

   1 /*      $Id: eqn.c,v 1.4 2011/03/22 09:48:13 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 "libmandoc.h"
  29 #include "libroff.h"
  30
  31 /* ARGSUSED */
  32 enum rofferr
  33 eqn_read(struct eqn_node **epp, int ln, const char *p, int offs)
  34 {
  35         size_t           sz;
  36         struct eqn_node *ep;
  37
  38         if (0 == strcmp(p, ".EN")) {
  39                 *epp = NULL;
  40                 return(ROFF_EQN);
  41         }
  42
  43         ep = *epp;
  44
  45         sz = strlen(&p[offs]);
  46         ep->eqn.data = mandoc_realloc(ep->eqn.data, ep->eqn.sz + sz + 1);
  47         if (0 == ep->eqn.sz)
  48                 *ep->eqn.data = '\0';
  49
  50         ep->eqn.sz += sz;
  51         strlcat(ep->eqn.data, &p[offs], ep->eqn.sz + 1);
  52         return(ROFF_IGN);
  53 }
  54
  55 struct eqn_node *
  56 eqn_alloc(int pos, int line)
  57 {
  58         struct eqn_node *p;
  59
  60         p = mandoc_calloc(1, sizeof(struct eqn_node));
  61         p->eqn.line = line;
  62         p->eqn.pos = pos;
  63
  64         return(p);
  65 }
  66
  67 /* ARGSUSED */
  68 void
  69 eqn_end(struct eqn_node *e)
  70 {
  71
  72         /* Nothing to do. */
  73 }
  74
  75 void
  76 eqn_free(struct eqn_node *p)
  77 {
  78
  79         free(p->eqn.data);
  80         free(p);
  81 }