allow --color arguments with RRGGBB and not only RRGGBBAA

git-svn-id: svn://svn.oetiker.ch/rrdtool/branches/1.2/program@377 a5681a0c-68f1-0310-ab6d-d61299d08faa

diff --git a/src/rrd_graph.c b/src/rrd_graph.c
index 66e6502..4b9cb6c 100644 (file)
--- a/src/rrd_graph.c
+++ b/src/rrd_graph.c
@@ -2850,7 +2850,7 @@ rrd_graph_options(int argc, char *argv[],image_desc_t *im)
            {0,0,0,0}};
        int option_index = 0;
        int opt;
-
+        int col_start,col_end;
 
        opt = getopt_long(argc, argv, 
                         "s:e:x:y:v:w:h:iu:l:rb:oc:n:m:t:f:a:I:zgjFYAMX:S:NT:",
@@ -3021,13 +3021,25 @@ rrd_graph_options(int argc, char *argv[],image_desc_t *im)
            break;
         case 'c':
             if(sscanf(optarg,
-                      "%10[A-Z]#%8lx",
-                      col_nam,&color) == 2){
+                      "%10[A-Z]#%n%8lx%n",
+                      col_nam,&col_start,&color,&col_end) == 2){
                 int ci;
+               int col_len = col_end - col_start;
+               switch (col_len){
+                       case 6:
+                               color = (color << 8) + 0xff /* shift left by 8 */;
+                               break;
+                       case 8:
+                               break;
+                       default:
+                               rrd_set_error("the color format is #RRGGBB[AA]");
+                               return;
+               }
                 if((ci=grc_conv(col_nam)) != -1){
                     im->graph_col[ci]=color;
                 }  else {
                   rrd_set_error("invalid color name '%s'",col_nam);
+                 return;
                 }
             } else {
                 rrd_set_error("invalid color def format");