Hello, attached is a small patch to refactor xsetcolorname(). Note the high similarity to xloadcols(). I wonder how necessary it is to realloc if name==NULL, given dc.col[] is only read except in xloadcols(), where exactly the same stuff is done to each array-item as repeated in xsetcolorname().
If I'm wrong, let me know. If not, we could skip the entire if(! name)-part. Cheers FRIGN -- FRIGN <[email protected]>
>From b1f44d918f982341a4b890777cb2a9d3937b6bce Mon Sep 17 00:00:00 2001 From: FRIGN <[email protected]> Date: Sun, 25 May 2014 12:13:22 +0200 Subject: [PATCH] Refactor xsetcolorname() I mainly improved the slightly off algorithm used to load colours in the 256-colour-space and removed unnecessary local values (r,g,b,colour). "colour" is not necessary as a punchbag for XftColorAlloc[Value,Name], as they don't mess with the result-adress until they are absolutely sure everything worked out[0]. Being at it, I changed the error-returns for AllocValue to dies (just like in xloadcols()), as a failure is most likely an OOM-situation you better catch early. In case of an invalid name everything stays the same. [0]: http://www.opensource.apple.com/source/X11libs/X11libs-40/libXft/libXft-2.1.13/src/xftcolor.c --- st.c | 32 ++++++++++++++------------------ 1 file changed, 14 insertions(+), 18 deletions(-) diff --git a/st.c b/st.c index 6424b54..c37576e 100644 --- a/st.c +++ b/st.c @@ -2755,32 +2755,28 @@ xloadcols(void) { int xsetcolorname(int x, const char *name) { XRenderColor color = { .alpha = 0xffff }; - Colour colour; + if(!BETWEEN(x, 0, LEN(colorname))) return -1; if(!name) { - if(BETWEEN(x, 16, 16 + 215)) { - int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6; - color.red = sixd_to_16bit(r); - color.green = sixd_to_16bit(g); - color.blue = sixd_to_16bit(b); - if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour)) - return 0; /* something went wrong */ - dc.col[x] = colour; + if(BETWEEN(x, 16, 6*6*6+16)) { /* 256 colour */ + color.red = sixd_to_16bit( ((x-16)/36)%6 ); + color.green = sixd_to_16bit( ((x-16)/6) %6 ); + color.blue = sixd_to_16bit( ((x-16)/1) %6 ); + if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[x])) + die("Could not allocate color %d\n", x); return 1; - } else if(BETWEEN(x, 16 + 216, 255)) { - color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216)); - if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour)) - return 0; /* something went wrong */ - dc.col[x] = colour; + } else if(BETWEEN(x, 6*6*6+16, 255)) { /* grayscale */ + color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x-(6*6*6+16)); + if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[x])) + die("Could not allocate color %d\n", x); return 1; - } else { + } else { /* system colours */ name = colorname[x]; } } - if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour)) - return 0; - dc.col[x] = colour; + if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &dc.col[x])) + return 0; /* invalid name */ return 1; } -- 1.8.3.2
