common.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause
   3  *
   4  * Copyright (c) 2021
   5  *      Cameron Katri.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY CAMERON KATRI AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL CAMERON KATRI OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #include <ctype.h>
  30 #include <err.h>
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33 #include <string.h>
  34
  35 #include "common.h"
  36
  37 struct color *
  38 parseansi(char *ansi, struct color *color)
  39 {
  40         long long num;
  41         char *token;
  42         bool bold = false, underline = false;
  43
  44         color->fg = 'x';
  45         color->bg = 'x';
  46
  47         while ((token = strsep(&ansi, ";")) != NULL) {
  48                 num = strtonum(token, 0, 47, NULL);
  49                 switch (num) {
  50                 case 1:
  51                         bold = true;
  52                         break;
  53                 case 4:
  54                         underline = true;
  55                         break;
  56                 default:
  57                         if (num <= 37)
  58                                 color->fg = (char)((num - 30) + 97);
  59                         else if (num <= 47)
  60                                 color->bg = (char)((num - 40) + 97);
  61                 }
  62         }
  63         if (bold)
  64                 color->fg = toupper(color->fg);
  65         if (underline)
  66                 color->bg = toupper(color->bg);
  67
  68         return color;
  69 }