man_action.c

   1 /*      $Id: man_action.c,v 1.12 2009/06/16 19:55:28 kristaps Exp $ */
   2 /*
   3  * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
   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/utsname.h>
  18
  19 #include <assert.h>
  20 #include <errno.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23
  24 #include "libman.h"
  25
  26 #ifdef __linux__
  27 extern  char            *strptime(const char *, const char *, struct tm *);
  28 #endif
  29
  30 struct  actions {
  31         int     (*post)(struct man *);
  32 };
  33
  34
  35 static  int       post_TH(struct man *);
  36 static  time_t    man_atotime(const char *);
  37
  38 const   struct actions man_actions[MAN_MAX] = {
  39         { NULL }, /* br */
  40         { post_TH }, /* TH */
  41         { NULL }, /* SH */
  42         { NULL }, /* SS */
  43         { NULL }, /* TP */
  44         { NULL }, /* LP */
  45         { NULL }, /* PP */
  46         { NULL }, /* P */
  47         { NULL }, /* IP */
  48         { NULL }, /* HP */
  49         { NULL }, /* SM */
  50         { NULL }, /* SB */
  51         { NULL }, /* BI */
  52         { NULL }, /* IB */
  53         { NULL }, /* BR */
  54         { NULL }, /* RB */
  55         { NULL }, /* R */
  56         { NULL }, /* B */
  57         { NULL }, /* I */
  58         { NULL }, /* IR */
  59         { NULL }, /* RI */
  60         { NULL }, /* na */
  61         { NULL }, /* i */
  62 };
  63
  64
  65 int
  66 man_action_post(struct man *m)
  67 {
  68
  69         if (MAN_ACTED & m->last->flags)
  70                 return(1);
  71         m->last->flags |= MAN_ACTED;
  72
  73         switch (m->last->type) {
  74         case (MAN_TEXT):
  75                 break;
  76         case (MAN_ROOT):
  77                 break;
  78         default:
  79                 if (NULL == man_actions[m->last->tok].post)
  80                         break;
  81                 return((*man_actions[m->last->tok].post)(m));
  82         }
  83         return(1);
  84 }
  85
  86
  87 static int
  88 post_TH(struct man *m)
  89 {
  90         struct man_node *n;
  91         char            *ep;
  92         long             lval;
  93
  94         if (m->meta.title)
  95                 free(m->meta.title);
  96         if (m->meta.vol)
  97                 free(m->meta.vol);
  98         if (m->meta.source)
  99                 free(m->meta.source);
 100
 101         m->meta.title = m->meta.vol = m->meta.source = NULL;
 102         m->meta.msec = 0;
 103         m->meta.date = 0;
 104
 105         /* ->TITLE<- MSEC DATE SOURCE VOL */
 106
 107         n = m->last->child;
 108         assert(n);
 109
 110         if (NULL == (m->meta.title = strdup(n->string)))
 111                 return(man_verr(m, n->line, n->pos,
 112                                         "memory exhausted"));
 113
 114         /* TITLE ->MSEC<- DATE SOURCE VOL */
 115
 116         n = n->next;
 117         assert(n);
 118
 119         errno = 0;
 120         lval = strtol(n->string, &ep, 10);
 121         if (n->string[0] != '\0' && *ep == '\0')
 122                 m->meta.msec = (int)lval;
 123         else if ( ! man_vwarn(m, n->line, n->pos, "invalid section"))
 124                 return(0);
 125
 126         /* TITLE MSEC ->DATE<- SOURCE VOL */
 127
 128         if (NULL == (n = n->next))
 129                 m->meta.date = time(NULL);
 130         else if (0 == (m->meta.date = man_atotime(n->string))) {
 131                 if ( ! man_vwarn(m, n->line, n->pos, "invalid date"))
 132                         return(0);
 133                 m->meta.date = time(NULL);
 134         }
 135
 136         /* TITLE MSEC DATE ->SOURCE<- VOL */
 137
 138         if (n && (n = n->next))
 139                 if (NULL == (m->meta.source = strdup(n->string)))
 140                         return(man_verr(m, n->line, n->pos,
 141                                                 "memory exhausted"));
 142
 143         /* TITLE MSEC DATE SOURCE ->VOL<- */
 144
 145         if (n && (n = n->next))
 146                 if (NULL == (m->meta.vol = strdup(n->string)))
 147                         return(man_verr(m, n->line, n->pos,
 148                                                 "memory exhausted"));
 149
 150         /*
 151          * The end document shouldn't have the prologue macros as part
 152          * of the syntax tree (they encompass only meta-data).
 153          */
 154
 155         if (m->last->parent->child == m->last) {
 156                 assert(MAN_ROOT == m->last->parent->type);
 157                 m->last->parent->child = NULL;
 158                 n = m->last;
 159                 m->last = m->last->parent;
 160                 m->next = MAN_NEXT_CHILD;
 161                 assert(m->last == m->first);
 162         } else {
 163                 assert(m->last->prev);
 164                 m->last->prev->next = NULL;
 165                 n = m->last;
 166                 m->last = m->last->prev;
 167                 m->next = MAN_NEXT_SIBLING;
 168         }
 169
 170         man_node_freelist(n);
 171         return(1);
 172 }
 173
 174
 175 static time_t
 176 man_atotime(const char *p)
 177 {
 178         struct tm        tm;
 179         char            *pp;
 180
 181         (void)memset(&tm, 0, sizeof(struct tm));
 182
 183         if ((pp = strptime(p, "%b %d %Y", &tm)) && 0 == *pp)
 184                 return(mktime(&tm));
 185         if ((pp = strptime(p, "%d %b %Y", &tm)) && 0 == *pp)
 186                 return(mktime(&tm));
 187         if ((pp = strptime(p, "%b %d, %Y", &tm)) && 0 == *pp)
 188                 return(mktime(&tm));
 189         if ((pp = strptime(p, "%b %Y", &tm)) && 0 == *pp)
 190                 return(mktime(&tm));
 191
 192         return(0);
 193 }