term_ascii.c

   1 /*      $Id: term_ascii.c,v 1.3 2010/06/09 08:07:13 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 #ifdef HAVE_CONFIG_H
  18 #include "config.h"
  19 #endif
  20
  21 #include <sys/types.h>
  22
  23 #include <assert.h>
  24 #include <stdint.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <unistd.h>
  28
  29 #include "out.h"
  30 #include "term.h"
  31 #include "main.h"
  32
  33 static  void              ascii_endline(struct termp *);
  34 static  void              ascii_letter(struct termp *, char);
  35 static  void              ascii_begin(struct termp *);
  36 static  void              ascii_advance(struct termp *, size_t);
  37 static  void              ascii_end(struct termp *);
  38
  39
  40 void *
  41 ascii_alloc(char *outopts)
  42 {
  43         struct termp    *p;
  44         const char      *toks[2];
  45         char            *v;
  46
  47         if (NULL == (p = term_alloc(TERMENC_ASCII)))
  48                 return(NULL);
  49
  50         p->type = TERMTYPE_CHAR;
  51         p->letter = ascii_letter;
  52         p->begin = ascii_begin;
  53         p->end = ascii_end;
  54         p->endline = ascii_endline;
  55         p->advance = ascii_advance;
  56
  57         toks[0] = "width";
  58         toks[1] = NULL;
  59
  60         while (outopts && *outopts)
  61                 switch (getsubopt(&outopts, UNCONST(toks), &v)) {
  62                 case (0):
  63                         p->defrmargin = (size_t)atoi(v);
  64                         break;
  65                 default:
  66                         break;
  67                 }
  68
  69         /* Enforce a lower boundary. */
  70         if (p->defrmargin < 58)
  71                 p->defrmargin = 58;
  72
  73         return(p);
  74 }
  75
  76
  77 void
  78 ascii_free(void *arg)
  79 {
  80
  81         term_free((struct termp *)arg);
  82 }
  83
  84
  85 /* ARGSUSED */
  86 static void
  87 ascii_letter(struct termp *p, char c)
  88 {
  89
  90         putchar(c);
  91 }
  92
  93
  94 static void
  95 ascii_begin(struct termp *p)
  96 {
  97
  98         (*p->headf)(p, p->argf);
  99 }
 100
 101
 102 static void
 103 ascii_end(struct termp *p)
 104 {
 105
 106         (*p->footf)(p, p->argf);
 107 }
 108
 109
 110 /* ARGSUSED */
 111 static void
 112 ascii_endline(struct termp *p)
 113 {
 114
 115         putchar('\n');
 116 }
 117
 118
 119 /* ARGSUSED */
 120 static void
 121 ascii_advance(struct termp *p, size_t len)
 122 {
 123         size_t          i;
 124
 125         /* Just print whitespace on the terminal. */
 126         for (i = 0; i < len; i++)
 127                 putchar(' ');
 128 }