man_argv.c

   1 /*      $Id: man_argv.c,v 1.4 2010/06/19 20:46:28 kristaps Exp $ */
   2 /*
   3  * Copyright (c) 2008, 2009 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 <sys/types.h>
  22
  23 #include <assert.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26
  27 #include "mandoc.h"
  28 #include "libman.h"
  29
  30
  31 int
  32 man_args(struct man *m, int line, int *pos, char *buf, char **v)
  33 {
  34
  35         assert(*pos);
  36         assert(' ' != buf[*pos]);
  37
  38         if (0 == buf[*pos])
  39                 return(ARGS_EOLN);
  40
  41         *v = &buf[*pos];
  42
  43         /*
  44          * Process a quoted literal.  A quote begins with a double-quote
  45          * and ends with a double-quote NOT preceded by a double-quote.
  46          * Whitespace is NOT involved in literal termination.
  47          */
  48
  49         if ('\"' == buf[*pos]) {
  50                 *v = &buf[++(*pos)];
  51
  52                 for ( ; buf[*pos]; (*pos)++) {
  53                         if ('\"' != buf[*pos])
  54                                 continue;
  55                         if ('\"' != buf[*pos + 1])
  56                                 break;
  57                         (*pos)++;
  58                 }
  59
  60                 if (0 == buf[*pos]) {
  61                         if ( ! man_pmsg(m, line, *pos, MANDOCERR_BADQUOTE))
  62                                 return(ARGS_ERROR);
  63                         return(ARGS_QWORD);
  64                 }
  65
  66                 buf[(*pos)++] = 0;
  67
  68                 if (0 == buf[*pos])
  69                         return(ARGS_QWORD);
  70
  71                 while (' ' == buf[*pos])
  72                         (*pos)++;
  73
  74                 if (0 == buf[*pos])
  75                         if ( ! man_pmsg(m, line, *pos, MANDOCERR_EOLNSPACE))
  76                                 return(ARGS_ERROR);
  77
  78                 return(ARGS_QWORD);
  79         }
  80
  81         /*
  82          * A non-quoted term progresses until either the end of line or
  83          * a non-escaped whitespace.
  84          */
  85
  86         for ( ; buf[*pos]; (*pos)++)
  87                 if (' ' == buf[*pos] && '\\' != buf[*pos - 1])
  88                         break;
  89
  90         if (0 == buf[*pos])
  91                 return(ARGS_WORD);
  92
  93         buf[(*pos)++] = 0;
  94
  95         while (' ' == buf[*pos])
  96                 (*pos)++;
  97
  98         if (0 == buf[*pos])
  99                 if ( ! man_pmsg(m, line, *pos, MANDOCERR_EOLNSPACE))
 100                         return(ARGS_ERROR);
 101
 102         return(ARGS_WORD);
 103 }
 104