demandoc.c

   1 /*      $Id: demandoc.c,v 1.13 2015/01/15 04:26:39 schwarze 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 #include "config.h"
  18
  19 #include <sys/types.h>
  20
  21 #include <assert.h>
  22 #include <ctype.h>
  23 #include <getopt.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <unistd.h>
  28
  29 #include "man.h"
  30 #include "mdoc.h"
  31 #include "mandoc.h"
  32
  33 static  void     pline(int, int *, int *, int);
  34 static  void     pman(const struct man_node *, int *, int *, int);
  35 static  void     pmandoc(struct mparse *, int, const char *, int);
  36 static  void     pmdoc(const struct mdoc_node *, int *, int *, int);
  37 static  void     pstring(const char *, int, int *, int);
  38 static  void     usage(void);
  39
  40 static  const char       *progname;
  41
  42 int
  43 main(int argc, char *argv[])
  44 {
  45         struct mparse   *mp;
  46         struct mchars   *mchars;
  47         int              ch, fd, i, list;
  48         extern int       optind;
  49
  50         progname = strrchr(argv[0], '/');
  51         if (progname == NULL)
  52                 progname = argv[0];
  53         else
  54                 ++progname;
  55
  56         mp = NULL;
  57         list = 0;
  58
  59         while (-1 != (ch = getopt(argc, argv, "ikm:pw")))
  60                 switch (ch) {
  61                 case ('i'):
  62                         /* FALLTHROUGH */
  63                 case ('k'):
  64                         /* FALLTHROUGH */
  65                 case ('m'):
  66                         /* FALLTHROUGH */
  67                 case ('p'):
  68                         break;
  69                 case ('w'):
  70                         list = 1;
  71                         break;
  72                 default:
  73                         usage();
  74                         return((int)MANDOCLEVEL_BADARG);
  75                 }
  76
  77         argc -= optind;
  78         argv += optind;
  79
  80         mchars = mchars_alloc();
  81         mp = mparse_alloc(MPARSE_SO, MANDOCLEVEL_BADARG, NULL, mchars, NULL);
  82         assert(mp);
  83
  84         if (0 == argc)
  85                 pmandoc(mp, STDIN_FILENO, "<stdin>", list);
  86
  87         for (i = 0; i < argc; i++) {
  88                 mparse_reset(mp);
  89                 if (mparse_open(mp, &fd, argv[i]) != MANDOCLEVEL_OK) {
  90                         perror(argv[i]);
  91                         continue;
  92                 }
  93                 pmandoc(mp, fd, argv[i], list);
  94         }
  95
  96         mparse_free(mp);
  97         mchars_free(mchars);
  98         return((int)MANDOCLEVEL_OK);
  99 }
 100
 101 static void
 102 usage(void)
 103 {
 104
 105         fprintf(stderr, "usage: %s [-w] [files...]\n", progname);
 106 }
 107
 108 static void
 109 pmandoc(struct mparse *mp, int fd, const char *fn, int list)
 110 {
 111         struct mdoc     *mdoc;
 112         struct man      *man;
 113         int              line, col;
 114
 115         mparse_readfd(mp, fd, fn);
 116         mparse_result(mp, &mdoc, &man, NULL);
 117         line = 1;
 118         col = 0;
 119
 120         if (mdoc)
 121                 pmdoc(mdoc_node(mdoc), &line, &col, list);
 122         else if (man)
 123                 pman(man_node(man), &line, &col, list);
 124         else
 125                 return;
 126
 127         if ( ! list)
 128                 putchar('\n');
 129 }
 130
 131 /*
 132  * Strip the escapes out of a string, emitting the results.
 133  */
 134 static void
 135 pstring(const char *p, int col, int *colp, int list)
 136 {
 137         enum mandoc_esc  esc;
 138         const char      *start, *end;
 139         int              emit;
 140
 141         /*
 142          * Print as many column spaces til we achieve parity with the
 143          * input document.
 144          */
 145
 146 again:
 147         if (list && '\0' != *p) {
 148                 while (isspace((unsigned char)*p))
 149                         p++;
 150
 151                 while ('\'' == *p || '(' == *p || '"' == *p)
 152                         p++;
 153
 154                 emit = isalpha((unsigned char)p[0]) &&
 155                         isalpha((unsigned char)p[1]);
 156
 157                 for (start = p; '\0' != *p; p++)
 158                         if ('\\' == *p) {
 159                                 p++;
 160                                 esc = mandoc_escape(&p, NULL, NULL);
 161                                 if (ESCAPE_ERROR == esc)
 162                                         return;
 163                                 emit = 0;
 164                         } else if (isspace((unsigned char)*p))
 165                                 break;
 166
 167                 end = p - 1;
 168
 169                 while (end > start)
 170                         if ('.' == *end || ',' == *end ||
 171                                         '\'' == *end || '"' == *end ||
 172                                         ')' == *end || '!' == *end ||
 173                                         '?' == *end || ':' == *end ||
 174                                         ';' == *end)
 175                                 end--;
 176                         else
 177                                 break;
 178
 179                 if (emit && end - start >= 1) {
 180                         for ( ; start <= end; start++)
 181                                 if (ASCII_HYPH == *start)
 182                                         putchar('-');
 183                                 else
 184                                         putchar((unsigned char)*start);
 185                         putchar('\n');
 186                 }
 187
 188                 if (isspace((unsigned char)*p))
 189                         goto again;
 190
 191                 return;
 192         }
 193
 194         while (*colp < col) {
 195                 putchar(' ');
 196                 (*colp)++;
 197         }
 198
 199         /*
 200          * Print the input word, skipping any special characters.
 201          */
 202         while ('\0' != *p)
 203                 if ('\\' == *p) {
 204                         p++;
 205                         esc = mandoc_escape(&p, NULL, NULL);
 206                         if (ESCAPE_ERROR == esc)
 207                                 break;
 208                 } else {
 209                         putchar((unsigned char )*p++);
 210                         (*colp)++;
 211                 }
 212 }
 213
 214 static void
 215 pline(int line, int *linep, int *col, int list)
 216 {
 217
 218         if (list)
 219                 return;
 220
 221         /*
 222          * Print out as many lines as needed to reach parity with the
 223          * original input.
 224          */
 225
 226         while (*linep < line) {
 227                 putchar('\n');
 228                 (*linep)++;
 229         }
 230
 231         *col = 0;
 232 }
 233
 234 static void
 235 pmdoc(const struct mdoc_node *p, int *line, int *col, int list)
 236 {
 237
 238         for ( ; p; p = p->next) {
 239                 if (MDOC_LINE & p->flags)
 240                         pline(p->line, line, col, list);
 241                 if (MDOC_TEXT == p->type)
 242                         pstring(p->string, p->pos, col, list);
 243                 if (p->child)
 244                         pmdoc(p->child, line, col, list);
 245         }
 246 }
 247
 248 static void
 249 pman(const struct man_node *p, int *line, int *col, int list)
 250 {
 251
 252         for ( ; p; p = p->next) {
 253                 if (MAN_LINE & p->flags)
 254                         pline(p->line, line, col, list);
 255                 if (MAN_TEXT == p->type)
 256                         pstring(p->string, p->pos, col, list);
 257                 if (p->child)
 258                         pman(p->child, line, col, list);
 259         }
 260 }