apply xresources-alt patch

https://tools.suckless.org/dmenu/patches/xresources-alt/

config.def.h

@@ -2,16 +2,25 @@
 /* Default settings; can be overriden by command line. */
 
 static int topbar = 1;                      /* -b  option; if 0, dmenu appears at bottom     */
+
 /* -fn option overrides fonts[0]; default X11 font or font set */
+static char font[] = "monospace:size=10";
 static const char *fonts[] = {
-	"monospace:size=10"
+	font,
+	"monospace:size=10",
 };
-static const char *prompt      = NULL;      /* -p  option; prompt to the left of input field */
-static const char *colors[SchemeLast][2] = {
+
+static char *prompt      = NULL;      /* -p  option; prompt to the left of input field */
+
+static char normfgcolor[] = "#bbbbbb";
+static char normbgcolor[] = "#222222";
+static char selfgcolor[]  = "#eeeeee";
+static char selbgcolor[]  = "#005577";
+static char *colors[SchemeLast][2] = {
 	/*     fg         bg       */
-	[SchemeNorm] = { "#bbbbbb", "#222222" },
-	[SchemeSel] = { "#eeeeee", "#005577" },
-	[SchemeOut] = { "#000000", "#00ffff" },
+	[SchemeNorm] = { normfgcolor, normbgcolor },
+	[SchemeSel]  = { selfgcolor,  selbgcolor  },
+	[SchemeOut]  = { "#000000",   "#00ffff" },
 };
 /* -l option; if nonzero, dmenu uses vertical list with given number of lines */
 static unsigned int lines      = 0;
@@ -21,3 +30,15 @@ static unsigned int lines      = 0;
  * for example: " /?\"&[]"
  */
 static const char worddelimiters[] = " ";
+
+/*
+ * Xresources preferences to load at startup
+ */
+ResourcePref resources[] = {
+	{ "font",        STRING, &font },
+	{ "normfgcolor", STRING, &normfgcolor },
+	{ "normbgcolor", STRING, &normbgcolor },
+	{ "selfgcolor",  STRING, &selfgcolor },
+	{ "selbgcolor",  STRING, &selbgcolor },
+	{ "prompt",      STRING, &prompt },
+};

dmenu.c

@@ -11,6 +11,7 @@
 #include <X11/Xlib.h>
 #include <X11/Xatom.h>
 #include <X11/Xutil.h>
+#include <X11/Xresource.h>
 #ifdef XINERAMA
 #include <X11/extensions/Xinerama.h>
 #endif
@@ -52,6 +53,21 @@ static XIC xic;
 static Drw *drw;
 static Clr *scheme[SchemeLast];
 
+/* Xresources preferences */
+enum resource_type {
+	STRING = 0,
+	INTEGER = 1,
+	FLOAT = 2
+};
+typedef struct {
+	char *name;
+	enum resource_type type;
+	void *dst;
+} ResourcePref;
+
+static void load_xresources(void);
+static void resource_load(XrmDatabase db, char *name, enum resource_type rtype, void *dst);
+
 #include "config.h"
 
 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
@@ -413,7 +429,7 @@ keypress(XKeyEvent *ev)
 
 	switch(ksym) {
 	default:
-insert:
+	insert:
 		if (!iscntrl((unsigned char)*buf))
 			insert(buf, len);
 		break;
@@ -572,6 +588,54 @@ readstdin(void)
 	lines = MIN(lines, i);
 }
 
+void
+resource_load(XrmDatabase db, char *name, enum resource_type rtype, void *dst)
+{
+	char *sdst = NULL;
+	int *idst = NULL;
+	float *fdst = NULL;
+	sdst = dst;
+	idst = dst;
+	fdst = dst;
+	char fullname[256];
+	char *type;
+	XrmValue ret;
+	snprintf(fullname, sizeof(fullname), "%s.%s", "dmenu", name);
+	fullname[sizeof(fullname) - 1] = '\0';
+	XrmGetResource(db, fullname, "*", &type, &ret);
+	if (!(ret.addr == NULL || strncmp("String", type, 64)))
+	{
+		switch (rtype) {
+		case STRING:
+			strcpy(sdst, ret.addr);
+			break;
+		case INTEGER:
+			*idst = strtoul(ret.addr, NULL, 10);
+			break;
+		case FLOAT:
+			*fdst = strtof(ret.addr, NULL);
+			break;
+		}
+	}
+}
+
+void
+load_xresources(void)
+{
+	Display *display;
+	char *resm;
+	XrmDatabase db;
+	ResourcePref *p;
+	display = XOpenDisplay(NULL);
+	resm = XResourceManagerString(display);
+	if (!resm)
+		return;
+	db = XrmGetStringDatabase(resm);
+	for (p = resources; p < resources + LENGTH(resources); p++)
+		resource_load(db, p->name, p->type, p->dst);
+	XCloseDisplay(display);
+}
+
 static void
 run(void)
 {
@@ -725,6 +789,9 @@ main(int argc, char *argv[])
 	XWindowAttributes wa;
 	int i, fast = 0;
 
+	XrmInitialize();
+	load_xresources();
+	
 	for (i = 1; i < argc; i++)
 		/* these options take no arguments */
 		if (!strcmp(argv[i], "-v")) {      /* prints version information */

drw.c

@@ -195,7 +195,7 @@ drw_clr_create(Drw *drw, Clr *dest, const char *clrname)
 /* Wrapper to create color schemes. The caller has to call free(3) on the
  * returned color scheme when done using it. */
 Clr *
-drw_scm_create(Drw *drw, const char *clrnames[], size_t clrcount)
+drw_scm_create(Drw *drw, char *clrnames[], size_t clrcount)
 {
 	size_t i;
 	Clr *ret;

drw.h

@@ -40,7 +40,7 @@ void drw_font_getexts(Fnt *font, const char *text, unsigned int len, unsigned in
 
 /* Colorscheme abstraction */
 void drw_clr_create(Drw *drw, Clr *dest, const char *clrname);
-Clr *drw_scm_create(Drw *drw, const char *clrnames[], size_t clrcount);
+Clr *drw_scm_create(Drw *drw, char *clrnames[], size_t clrcount);
 
 /* Cursor abstraction */
 Cur *drw_cur_create(Drw *drw, int shape);