spmenu/libs/xrdb.c

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", "spmenu", name);
	fullname[sizeof(fullname) - 1] = '\0';
	XrmGetResource(db, fullname, "*", &type, &ret);
    if (!xresources) return;
	if (!(ret.addr == NULL || strncmp("String", type, 64))) {
		switch (rtype) { // type
            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 || !xresources)
		return;
	db = XrmGetStringDatabase(resm);

	for (p = resources; p < resources + LENGTH(resources); p++)
		resource_load(db, p->name, p->type, p->dst);

    // recognize global colors
    if (globalcolors) {
        for (p = cols; p < cols + LENGTH(cols); p++)
            resource_load(db, p->name, p->type, p->dst);
    }

	XCloseDisplay(display);
}