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Fixing color and refactor xsetcolorname. 

By  the recommendation of FRIGN I refactored xsetcolorname to remove the
unnecessary r, g, b variables when allocating a new  color.  Colors  are
now freed and set to the new color. A die() should not happen here. Oth‐
erwise it is easy for applications to kill st. St should be resilent  to
malicious input.

Second  this  patch  standardises  the  naming  of  »color«. There is no
»colour« here. Maybe in some parts of the world.
This commit is contained in:
Christoph Lohmann 2014-06-01 17:08:16 +02:00
parent 8b4cfcea73
commit c6fcb78b3a
1 changed files with 50 additions and 38 deletions
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st.c
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@ -179,8 +179,8 @@ typedef unsigned long ulong;
typedef unsigned short ushort; typedef unsigned short ushort;
typedef XftDraw *Draw; typedef XftDraw *Draw;
typedef XftColor Colour; typedef XftColor Color;
typedef Colormap Colourmap; typedef Colormap Colormap;
typedef struct { typedef struct {
char c[UTF_SIZ]; /* character code */ char c[UTF_SIZ]; /* character code */
@ -241,7 +241,7 @@ typedef struct {
/* Purely graphic info */ /* Purely graphic info */
typedef struct { typedef struct {
Display *dpy; Display *dpy;
Colourmap cmap; Colormap cmap;
Window win; Window win;
Drawable buf; Drawable buf;
Atom xembed, wmdeletewin, netwmname, netwmpid; Atom xembed, wmdeletewin, netwmname, netwmpid;
@ -340,7 +340,7 @@ typedef struct {
/* Drawing Context */ /* Drawing Context */
typedef struct { typedef struct {
Colour col[MAX(LEN(colorname), 256)]; Color col[MAX(LEN(colorname), 256)];
Font font, bfont, ifont, ibfont; Font font, bfont, ifont, ibfont;
GC gc; GC gc;
} DC; } DC;
@ -1631,7 +1631,7 @@ tdefcolor(int *attr, int *npar, int l) {
uint r, g, b; uint r, g, b;
switch (attr[*npar + 1]) { switch (attr[*npar + 1]) {
case 2: /* direct colour in RGB space */ case 2: /* direct color in RGB space */
if (*npar + 4 >= l) { if (*npar + 4 >= l) {
fprintf(stderr, fprintf(stderr,
"erresc(38): Incorrect number of parameters (%d)\n", "erresc(38): Incorrect number of parameters (%d)\n",
@ -1648,7 +1648,7 @@ tdefcolor(int *attr, int *npar, int l) {
else else
idx = TRUECOLOR(r, g, b); idx = TRUECOLOR(r, g, b);
break; break;
case 5: /* indexed colour */ case 5: /* indexed color */
if (*npar + 2 >= l) { if (*npar + 2 >= l) {
fprintf(stderr, fprintf(stderr,
"erresc(38): Incorrect number of parameters (%d)\n", "erresc(38): Incorrect number of parameters (%d)\n",
@ -1663,8 +1663,8 @@ tdefcolor(int *attr, int *npar, int l) {
break; break;
case 0: /* implemented defined (only foreground) */ case 0: /* implemented defined (only foreground) */
case 1: /* transparent */ case 1: /* transparent */
case 3: /* direct colour in CMY space */ case 3: /* direct color in CMY space */
case 4: /* direct colour in CMYK space */ case 4: /* direct color in CMYK space */
default: default:
fprintf(stderr, fprintf(stderr,
"erresc(38): gfx attr %d unknown\n", attr[*npar]); "erresc(38): gfx attr %d unknown\n", attr[*npar]);
@ -2151,7 +2151,7 @@ strhandle(void) {
/* FALLTHROUGH */ /* FALLTHROUGH */
case 104: /* color reset, here p = NULL */ case 104: /* color reset, here p = NULL */
j = (narg > 1) ? atoi(strescseq.args[1]) : -1; j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
if (!xsetcolorname(j, p)) { if(xsetcolorname(j, p)) {
fprintf(stderr, "erresc: invalid color %s\n", p); fprintf(stderr, "erresc: invalid color %s\n", p);
} else { } else {
/* /*
@ -2720,14 +2720,14 @@ xloadcols(void) {
int i; int i;
XRenderColor color = { .alpha = 0xffff }; XRenderColor color = { .alpha = 0xffff };
static bool loaded; static bool loaded;
Colour *cp; Color *cp;
if(loaded) { if(loaded) {
for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp) for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
XftColorFree(xw.dpy, xw.vis, xw.cmap, cp); XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
} }
/* load colours [0-15] and [256-LEN(colorname)] (config.h) */ /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
for(i = 0; i < LEN(colorname); i++) { for(i = 0; i < LEN(colorname); i++) {
if(!colorname[i]) if(!colorname[i])
continue; continue;
@ -2736,7 +2736,7 @@ xloadcols(void) {
} }
} }
/* load colours [16-231] ; same colours as xterm */ /* load colors [16-231] ; same colors as xterm */
for(i = 16; i < 6*6*6+16; i++) { for(i = 16; i < 6*6*6+16; i++) {
color.red = sixd_to_16bit( ((i-16)/36)%6 ); color.red = sixd_to_16bit( ((i-16)/36)%6 );
color.green = sixd_to_16bit( ((i-16)/6) %6 ); color.green = sixd_to_16bit( ((i-16)/6) %6 );
@ -2745,7 +2745,7 @@ xloadcols(void) {
die("Could not allocate color %d\n", i); die("Could not allocate color %d\n", i);
} }
/* load colours [232-255] ; grayscale */ /* load colors [232-255] ; grayscale */
for(; i < 256; i++) { for(; i < 256; i++) {
color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16)); color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
@ -2757,33 +2757,45 @@ xloadcols(void) {
int int
xsetcolorname(int x, const char *name) { xsetcolorname(int x, const char *name) {
XRenderColor color = { .alpha = 0xffff }; XRenderColor color = { .alpha = 0xffff };
Colour colour; Color ncolor;
if(!BETWEEN(x, 0, LEN(colorname))) if(!BETWEEN(x, 0, LEN(colorname)))
return -1; return 1;
if(!name) { if(!name) {
if(BETWEEN(x, 16, 16 + 215)) { if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6; color.red = sixd_to_16bit( ((x-16)/36)%6 );
color.red = sixd_to_16bit(r); color.green = sixd_to_16bit( ((x-16)/6) %6 );
color.green = sixd_to_16bit(g); color.blue = sixd_to_16bit( ((x-16)/1) %6 );
color.blue = sixd_to_16bit(b); if(!XftColorAllocValue(xw.dpy, xw.vis,
if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour)) xw.cmap, &color, &ncolor)) {
return 0; /* something went wrong */ return 1;
dc.col[x] = colour; }
return 1;
} else if(BETWEEN(x, 16 + 216, 255)) { XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216)); dc.col[x] = ncolor;
if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour)) return 0;
return 0; /* something went wrong */ } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
dc.col[x] = colour; color.red = color.green = color.blue = \
return 1; 0x0808 + 0x0a0a * (x - (16 + 216));
} else { if(!XftColorAllocValue(xw.dpy, xw.vis,
xw.cmap, &color, &ncolor)) {
return 1;
}
XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
dc.col[x] = ncolor;
return 0;
} else { /* system colors */
name = colorname[x]; name = colorname[x];
} }
} }
if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour)) if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
return 0; return 1;
dc.col[x] = colour;
return 1; XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
dc.col[x] = ncolor;
return 0;
} }
void void
@ -3099,7 +3111,7 @@ xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
FcPattern *fcpattern, *fontpattern; FcPattern *fcpattern, *fontpattern;
FcFontSet *fcsets[] = { NULL }; FcFontSet *fcsets[] = { NULL };
FcCharSet *fccharset; FcCharSet *fccharset;
Colour *fg, *bg, *temp, revfg, revbg, truefg, truebg; Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
XRenderColor colfg, colbg; XRenderColor colfg, colbg;
XRectangle r; XRectangle r;
int oneatatime; int oneatatime;
@ -3145,8 +3157,8 @@ xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
if(base.mode & ATTR_BOLD) { if(base.mode & ATTR_BOLD) {
/* /*
* change basic system colours [0-7] * change basic system colors [0-7]
* to bright system colours [8-15] * to bright system colors [8-15]
*/ */
if(BETWEEN(base.fg, 0, 7)) if(BETWEEN(base.fg, 0, 7))
fg = &dc.col[base.fg + 8]; fg = &dc.col[base.fg + 8];