ncurses 5.9 - patch 20120303

[ncurses.git] / ncurses / base / lib_color.c

diff --git a/ncurses/base/lib_color.c b/ncurses/base/lib_color.c
index 1f1e25f38b295b09ac9facf9868f710ddc58a6a9..5495c6003dc54cf54468828aa18143f81b714843 100644 (file)
--- a/ncurses/base/lib_color.c
+++ b/ncurses/base/lib_color.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * Copyright (c) 1998-2008,2009 Free Software Foundation, Inc.              *
+ * Copyright (c) 1998-2010,2011 Free Software Foundation, Inc.              *
  *                                                                          *
  * Permission is hereby granted, free of charge, to any person obtaining a  *
  * copy of this software and associated documentation files (the            *
@@ -45,7 +45,7 @@
 #define CUR SP_TERMTYPE
 #endif
 
-MODULE_ID("$Id: lib_color.c,v 1.96 2009/10/24 22:50:51 tom Exp $")
+MODULE_ID("$Id: lib_color.c,v 1.104 2011/10/22 15:53:42 tom Exp $")
 
 #ifdef USE_TERM_DRIVER
 #define CanChange      InfoOf(SP_PARM).canchange
@@ -262,6 +262,7 @@ reset_color_pair(NCURSES_SP_DCL0)
 #else
     bool result = FALSE;
 
+    (void) SP_PARM;
     if (orig_pair != 0) {
        TPUTS_TRACE("orig_pair");
        putp(orig_pair);
@@ -330,6 +331,13 @@ NCURSES_SP_NAME(start_color) (NCURSES_SP_DCL0)
                                 default_bg(NCURSES_SP_ARG),
                                 NCURSES_SP_NAME(_nc_outch));
        }
+#if !NCURSES_EXT_COLORS
+       /*
+        * Without ext-colors, we cannot represent more than 256 color pairs.
+        */
+       if (maxpairs > 256)
+           maxpairs = 256;
+#endif
 
        if (maxpairs > 0 && maxcolors > 0) {
            SP_PARM->_pair_limit = maxpairs;
@@ -382,10 +390,10 @@ start_color(void)
 
 /* This function was originally written by Daniel Weaver <danw@znyx.com> */
 static void
-rgb2hls(short r, short g, short b, short *h, short *l, short *s)
+rgb2hls(int r, int g, int b, short *h, short *l, short *s)
 /* convert RGB to HLS system */
 {
-    short min, max, t;
+    int min, max, t;
 
     if ((min = g < r ? g : r) > b)
        min = b;
@@ -393,7 +401,7 @@ rgb2hls(short r, short g, short b, short *h, short *l, short *s)
        max = b;
 
     /* calculate lightness */
-    *l = (min + max) / 20;
+    *l = (short) ((min + max) / 20);
 
     if (min == max) {          /* black, white and all shades of gray */
        *h = 0;
@@ -403,19 +411,19 @@ rgb2hls(short r, short g, short b, short *h, short *l, short *s)
 
     /* calculate saturation */
     if (*l < 50)
-       *s = ((max - min) * 100) / (max + min);
+       *s = (short) (((max - min) * 100) / (max + min));
     else
-       *s = ((max - min) * 100) / (2000 - max - min);
+       *s = (short) (((max - min) * 100) / (2000 - max - min));
 
     /* calculate hue */
     if (r == max)
-       t = 120 + ((g - b) * 60) / (max - min);
+       t = (short) (120 + ((g - b) * 60) / (max - min));
     else if (g == max)
-       t = 240 + ((b - r) * 60) / (max - min);
+       t = (short) (240 + ((b - r) * 60) / (max - min));
     else
-       t = 360 + ((r - g) * 60) / (max - min);
+       t = (short) (360 + ((r - g) * 60) / (max - min));
 
-    *h = t % 360;
+    *h = (short) (t % 360);
 }
 
 /*
@@ -438,7 +446,7 @@ NCURSES_SP_NAME(init_pair) (NCURSES_SP_DCLx short pair, short f, short b)
 
     previous = SP_PARM->_color_pairs[pair];
 #if NCURSES_EXT_FUNCS
-    if (SP_PARM->_default_color) {
+    if (SP_PARM->_default_color || SP_PARM->_assumed_color) {
        bool isDefault = FALSE;
        bool wasDefault = FALSE;
        int default_pairs = SP_PARM->_default_pairs;
@@ -497,8 +505,9 @@ NCURSES_SP_NAME(init_pair) (NCURSES_SP_DCLx short pair, short f, short b)
     {
        if ((f < 0) || !OkColorHi(f)
            || (b < 0) || !OkColorHi(b)
-           || (pair < 1))
+           || (pair < 1)) {
            returnCode(ERR);
+       }
     }
 
     /*
@@ -627,8 +636,15 @@ init_color(short color, short r, short g, short b)
 NCURSES_EXPORT(bool)
 NCURSES_SP_NAME(can_change_color) (NCURSES_SP_DCL)
 {
+    int result = FALSE;
+
     T((T_CALLED("can_change_color(%p)"), (void *) SP_PARM));
-    returnCode((CanChange != 0) ? TRUE : FALSE);
+
+    if (HasTerminal(SP_PARM) && (CanChange != 0)) {
+       result = TRUE;
+    }
+
+    returnCode(result);
 }
 
 #if NCURSES_SP_FUNCS
@@ -642,19 +658,22 @@ can_change_color(void)
 NCURSES_EXPORT(bool)
 NCURSES_SP_NAME(has_colors) (NCURSES_SP_DCL0)
 {
-    int code;
+    int code = FALSE;
 
+    (void) SP_PARM;
     T((T_CALLED("has_colors()")));
+    if (HasTerminal(SP_PARM)) {
 #ifdef USE_TERM_DRIVER
-    code = HasColor;
+       code = HasColor;
 #else
-    code = ((VALID_NUMERIC(max_colors) && VALID_NUMERIC(max_pairs)
-            && (((set_foreground != NULL)
-                 && (set_background != NULL))
-                || ((set_a_foreground != NULL)
-                    && (set_a_background != NULL))
-                || set_color_pair)) ? TRUE : FALSE);
+       code = ((VALID_NUMERIC(max_colors) && VALID_NUMERIC(max_pairs)
+                && (((set_foreground != NULL)
+                     && (set_background != NULL))
+                    || ((set_a_foreground != NULL)
+                        && (set_a_background != NULL))
+                    || set_color_pair)) ? TRUE : FALSE);
 #endif
+    }
     returnCode(code);
 }
 
@@ -763,9 +782,9 @@ pair_content(short pair, short *f, short *b)
 
 NCURSES_EXPORT(void)
 NCURSES_SP_NAME(_nc_do_color) (NCURSES_SP_DCLx
-                              short old_pair,
-                              short pair,
-                              bool reverse,
+                              int old_pair,
+                              int pair,
+                              int reverse,
                               NCURSES_SP_OUTC outc)
 {
 #ifdef USE_TERM_DRIVER
@@ -820,9 +839,9 @@ NCURSES_SP_NAME(_nc_do_color) (NCURSES_SP_DCLx
 
 #if NCURSES_EXT_FUNCS
     if (isDefaultColor(fg))
-       fg = default_fg(NCURSES_SP_ARG);
+       fg = (short) default_fg(NCURSES_SP_ARG);
     if (isDefaultColor(bg))
-       bg = default_bg(NCURSES_SP_ARG);
+       bg = (short) default_bg(NCURSES_SP_ARG);
 #endif
 
     if (reverse) {
@@ -845,7 +864,7 @@ NCURSES_SP_NAME(_nc_do_color) (NCURSES_SP_DCLx
 
 #if NCURSES_SP_FUNCS
 NCURSES_EXPORT(void)
-_nc_do_color(short old_pair, short pair, bool reverse, NCURSES_OUTC outc)
+_nc_do_color(int old_pair, int pair, int reverse, NCURSES_OUTC outc)
 {
     SetSafeOutcWrapper(outc);
     NCURSES_SP_NAME(_nc_do_color) (CURRENT_SCREEN,