man_action.c

   1 /*      $Id: man_action.c,v 1.11 2009/06/10 20:18:43 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 }, /* __ */
  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 }, /* br */
  61         { NULL }, /* na */
  62         { NULL }, /* i */
  63 };
  64
  65
  66 int
  67 man_action_post(struct man *m)
  68 {
  69
  70         if (MAN_ACTED & m->last->flags)
  71                 return(1);
  72         m->last->flags |= MAN_ACTED;
  73
  74         switch (m->last->type) {
  75         case (MAN_TEXT):
  76                 break;
  77         case (MAN_ROOT):
  78                 break;
  79         default:
  80                 if (NULL == man_actions[m->last->tok].post)
  81                         break;
  82                 return((*man_actions[m->last->tok].post)(m));
  83         }
  84         return(1);
  85 }
  86
  87
  88 static int
  89 post_TH(struct man *m)
  90 {
  91         struct man_node *n;
  92         char            *ep;
  93         long             lval;
  94
  95         if (m->meta.title)
  96                 free(m->meta.title);
  97         if (m->meta.vol)
  98                 free(m->meta.vol);
  99         if (m->meta.source)
 100                 free(m->meta.source);
 101
 102         m->meta.title = m->meta.vol = m->meta.source = NULL;
 103         m->meta.msec = 0;
 104         m->meta.date = 0;
 105
 106         /* ->TITLE<- MSEC DATE SOURCE VOL */
 107
 108         n = m->last->child;
 109         assert(n);
 110
 111         if (NULL == (m->meta.title = strdup(n->string)))
 112                 return(man_verr(m, n->line, n->pos,
 113                                         "memory exhausted"));
 114
 115         /* TITLE ->MSEC<- DATE SOURCE VOL */
 116
 117         n = n->next;
 118         assert(n);
 119
 120         errno = 0;
 121         lval = strtol(n->string, &ep, 10);
 122         if (n->string[0] != '\0' && *ep == '\0')
 123                 m->meta.msec = (int)lval;
 124         else if ( ! man_vwarn(m, n->line, n->pos, "invalid section"))
 125                 return(0);
 126
 127         /* TITLE MSEC ->DATE<- SOURCE VOL */
 128
 129         if (NULL == (n = n->next))
 130                 m->meta.date = time(NULL);
 131         else if (0 == (m->meta.date = man_atotime(n->string))) {
 132                 if ( ! man_vwarn(m, n->line, n->pos, "invalid date"))
 133                         return(0);
 134                 m->meta.date = time(NULL);
 135         }
 136
 137         /* TITLE MSEC DATE ->SOURCE<- VOL */
 138
 139         if (n && (n = n->next))
 140                 if (NULL == (m->meta.source = strdup(n->string)))
 141                         return(man_verr(m, n->line, n->pos,
 142                                                 "memory exhausted"));
 143
 144         /* TITLE MSEC DATE SOURCE ->VOL<- */
 145
 146         if (n && (n = n->next))
 147                 if (NULL == (m->meta.vol = strdup(n->string)))
 148                         return(man_verr(m, n->line, n->pos,
 149                                                 "memory exhausted"));
 150
 151         /*
 152          * The end document shouldn't have the prologue macros as part
 153          * of the syntax tree (they encompass only meta-data).
 154          */
 155
 156         if (m->last->parent->child == m->last) {
 157                 assert(MAN_ROOT == m->last->parent->type);
 158                 m->last->parent->child = NULL;
 159                 n = m->last;
 160                 m->last = m->last->parent;
 161                 m->next = MAN_NEXT_CHILD;
 162                 assert(m->last == m->first);
 163         } else {
 164                 assert(m->last->prev);
 165                 m->last->prev->next = NULL;
 166                 n = m->last;
 167                 m->last = m->last->prev;
 168                 m->next = MAN_NEXT_SIBLING;
 169         }
 170
 171         man_node_freelist(n);
 172         return(1);
 173 }
 174
 175
 176 static time_t
 177 man_atotime(const char *p)
 178 {
 179         struct tm        tm;
 180         char            *pp;
 181
 182         (void)memset(&tm, 0, sizeof(struct tm));
 183
 184         if ((pp = strptime(p, "%b %d %Y", &tm)) && 0 == *pp)
 185                 return(mktime(&tm));
 186         if ((pp = strptime(p, "%d %b %Y", &tm)) && 0 == *pp)
 187                 return(mktime(&tm));
 188         if ((pp = strptime(p, "%b %d, %Y", &tm)) && 0 == *pp)
 189                 return(mktime(&tm));
 190         if ((pp = strptime(p, "%b %Y", &tm)) && 0 == *pp)
 191                 return(mktime(&tm));
 192
 193         return(0);
 194 }