contrib/mdocml/demandoc.c

   1 /*      $Id: demandoc.c,v 1.33 2019/03/03 11:01:15 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 <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <unistd.h>
  27
  28 #include "mandoc.h"
  29 #include "roff.h"
  30 #include "man.h"
  31 #include "mdoc.h"
  32 #include "mandoc_parse.h"
  33
  34 static  void     pline(int, int *, int *, int);
  35 static  void     pman(const struct roff_node *, int *, int *, int);
  36 static  void     pmandoc(struct mparse *, int, const char *, int);
  37 static  void     pmdoc(const struct roff_node *, int *, int *, int);
  38 static  void     pstring(const char *, int, int *, int);
  39 static  void     usage(void);
  40
  41 static  const char       *progname;
  42
  43 int
  44 main(int argc, char *argv[])
  45 {
  46         struct mparse   *mp;
  47         int              ch, fd, i, list;
  48         extern int       optind;
  49
  50         if (argc < 1)
  51                 progname = "demandoc";
  52         else if ((progname = strrchr(argv[0], '/')) == NULL)
  53                 progname = argv[0];
  54         else
  55                 ++progname;
  56
  57         mp = NULL;
  58         list = 0;
  59
  60         while (-1 != (ch = getopt(argc, argv, "ikm:pw")))
  61                 switch (ch) {
  62                 case ('i'):
  63                         /* FALLTHROUGH */
  64                 case ('k'):
  65                         /* FALLTHROUGH */
  66                 case ('m'):
  67                         /* FALLTHROUGH */
  68                 case ('p'):
  69                         break;
  70                 case ('w'):
  71                         list = 1;
  72                         break;
  73                 default:
  74                         usage();
  75                         return (int)MANDOCLEVEL_BADARG;
  76                 }
  77
  78         argc -= optind;
  79         argv += optind;
  80
  81         mchars_alloc();
  82         mp = mparse_alloc(MPARSE_SO | MPARSE_UTF8 | MPARSE_LATIN1 |
  83             MPARSE_VALIDATE, MANDOC_OS_OTHER, NULL);
  84         assert(mp);
  85
  86         if (argc < 1)
  87                 pmandoc(mp, STDIN_FILENO, "<stdin>", list);
  88
  89         for (i = 0; i < argc; i++) {
  90                 mparse_reset(mp);
  91                 if ((fd = mparse_open(mp, argv[i])) == -1) {
  92                         perror(argv[i]);
  93                         continue;
  94                 }
  95                 pmandoc(mp, fd, argv[i], list);
  96         }
  97
  98         mparse_free(mp);
  99         mchars_free();
 100         return (int)MANDOCLEVEL_OK;
 101 }
 102
 103 static void
 104 usage(void)
 105 {
 106
 107         fprintf(stderr, "usage: %s [-w] [files...]\n", progname);
 108 }
 109
 110 static void
 111 pmandoc(struct mparse *mp, int fd, const char *fn, int list)
 112 {
 113         struct roff_meta        *meta;
 114         int              line, col;
 115
 116         mparse_readfd(mp, fd, fn);
 117         close(fd);
 118         meta = mparse_result(mp);
 119         line = 1;
 120         col = 0;
 121
 122         if (meta->macroset == MACROSET_MDOC)
 123                 pmdoc(meta->first->child, &line, &col, list);
 124         else
 125                 pman(meta->first->child, &line, &col, list);
 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 roff_node *p, int *line, int *col, int list)
 236 {
 237
 238         for ( ; p; p = p->next) {
 239                 if (NODE_LINE & p->flags)
 240                         pline(p->line, line, col, list);
 241                 if (ROFFT_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 roff_node *p, int *line, int *col, int list)
 250 {
 251
 252         for ( ; p; p = p->next) {
 253                 if (NODE_LINE & p->flags)
 254                         pline(p->line, line, col, list);
 255                 if (ROFFT_TEXT == p->type)
 256                         pstring(p->string, p->pos, col, list);
 257                 if (p->child)
 258                         pman(p->child, line, col, list);
 259         }
 260 }