pith/osdep/color.c

   1 #if !defined(lint) && !defined(DOS)
   2 static char rcsid[] = "$Id: color.c 761 2007-10-23 22:35:18Z hubert@u.washington.edu $";
   3 #endif
   4
   5 /*
   6  * ========================================================================
   7  * Copyright 2013-2021 Eduardo Chappa
   8  * Copyright 2006 University of Washington
   9  *
  10  * Licensed under the Apache License, Version 2.0 (the "License");
  11  * you may not use this file except in compliance with the License.
  12  * You may obtain a copy of the License at
  13  *
  14  *     http://www.apache.org/licenses/LICENSE-2.0
  15  *
  16  * ========================================================================
  17  */
  18
  19    /*
  20     *
  21     *  These routines themselves aren't necessarily OS-specific, they
  22     *  are all called from within pico, pine and webpine.
  23     *
  24     *  They used to be in pico source (osdep/unix, mswin.c), but considering
  25     *  webpine uses color as well and it should *not* have to be linked
  26     *  against libpico and considering pico uses these routines but should
  27     *  not have to link against libpith (and in turn c-client) we put them
  28     *  in pith/osdep which should only have to link against system libraries
  29     *  and thus be include freely in all of pine, pico and webpine.
  30     */
  31
  32
  33 #include <system.h>
  34 #include "./color.h"
  35
  36
  37
  38 /*
  39  * new_color_pair - allocate a new color pair structure assigning
  40  *                  given foreground and background color strings
  41  */
  42 COLOR_PAIR *
  43 new_color_pair(char *fg, char *bg)
  44 {
  45     COLOR_PAIR *ret;
  46
  47     if((ret = (COLOR_PAIR *) malloc(sizeof(*ret))) != NULL){
  48         memset(ret, 0, sizeof(*ret));
  49         if(fg){
  50             strncpy(ret->fg, fg, MAXCOLORLEN);
  51             ret->fg[MAXCOLORLEN] = '\0';
  52         }
  53
  54         if(bg){
  55             strncpy(ret->bg, bg, MAXCOLORLEN);
  56             ret->bg[MAXCOLORLEN] = '\0';
  57         }
  58     }
  59
  60     return(ret);
  61 }
  62
  63
  64 /*
  65  * free_color_pair - release resources associated with given
  66  *                   color pair structure
  67  */
  68 void
  69 free_color_pair(COLOR_PAIR **cp)
  70 {
  71     if(cp && *cp){
  72         free(*cp);
  73         *cp = NULL;
  74     }
  75 }
  76
  77
  78 /*
  79  * Just like pico_set_color except it doesn't set the color, it just
  80  * returns the value. Assumes def of PSC_NONE, since otherwise we always
  81  * succeed and don't need to call this.
  82  */
  83 int
  84 pico_is_good_colorpair(COLOR_PAIR *cp)
  85 {
  86     return(cp && pico_is_good_color(cp->fg) && pico_is_good_color(cp->bg));
  87 }
  88
  89
  90 COLOR_PAIR *
  91 pico_set_colorp(COLOR_PAIR *col, int flags)
  92 {
  93     return(pico_set_colors(col ? col->fg : NULL, col ? col->bg : NULL, flags));
  94 }