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#include "capabilities.h"
////////////////////////////////////////////////////////
#define SETABS(c, x, map, key, fd) \
c->has_##x = getbit(map, key) && getabs(&c->abs_##x, key, fd)
#define ADDCAP(s, c, x) strcat(s, c->has_##x ? " " #x : "")
////////////////////////////////////////////////////////
static const int bits_per_long = 8 * sizeof(long);
static inline int nlongs(int nbit)
{
return (nbit + bits_per_long - 1) / bits_per_long;
}
static inline bool getbit(const unsigned long* map, int key)
{
return (map[key / bits_per_long] >> (key % bits_per_long)) & 0x01;
}
static bool getabs(struct input_absinfo *abs, int key, int fd)
{
int rc;
SYSCALL(rc = ioctl(fd, EVIOCGABS(key), abs));
return rc >= 0;
}
////////////////////////////////////////////////////////
int read_capabilities(struct Capabilities *cap, int fd)
{
unsigned long evbits[nlongs(EV_MAX)];
unsigned long absbits[nlongs(ABS_MAX)];
unsigned long keybits[nlongs(KEY_MAX)];
int rc;
memset(cap, 0, sizeof(struct Capabilities));
SYSCALL(rc = ioctl(fd, EVIOCGBIT(EV_SYN, sizeof(evbits)), evbits));
if (rc < 0)
return rc;
SYSCALL(rc = ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(keybits)), keybits));
if (rc < 0)
return rc;
SYSCALL(rc = ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(absbits)), absbits));
if (rc < 0)
return rc;
cap->has_left = getbit(keybits, BTN_LEFT);
cap->has_middle = getbit(keybits, BTN_MIDDLE);
cap->has_right = getbit(keybits, BTN_RIGHT);
SETABS(cap, touch_major, absbits, ABS_MT_TOUCH_MAJOR, fd);
SETABS(cap, touch_minor, absbits, ABS_MT_TOUCH_MINOR, fd);
SETABS(cap, width_major, absbits, ABS_MT_WIDTH_MAJOR, fd);
SETABS(cap, width_minor, absbits, ABS_MT_WIDTH_MINOR, fd);
SETABS(cap, orientation, absbits, ABS_MT_ORIENTATION, fd);
SETABS(cap, position_x, absbits, ABS_MT_POSITION_X, fd);
SETABS(cap, position_y, absbits, ABS_MT_POSITION_Y, fd);
cap->has_mtdata = cap->has_position_x && cap->has_position_y;
return 0;
}
////////////////////////////////////////////////////////
void output_capabilities(const struct Capabilities *cap)
{
char line[1024];
memset(line, 0, sizeof(line));
ADDCAP(line, cap, left);
ADDCAP(line, cap, middle);
ADDCAP(line, cap, right);
ADDCAP(line, cap, mtdata);
ADDCAP(line, cap, touch_major);
ADDCAP(line, cap, touch_minor);
ADDCAP(line, cap, width_major);
ADDCAP(line, cap, width_minor);
ADDCAP(line, cap, orientation);
ADDCAP(line, cap, position_x);
ADDCAP(line, cap, position_y);
xf86Msg(X_INFO, "multitouch: caps:%s\n", line);
if (cap->has_touch_major)
xf86Msg(X_INFO, "multitouch: touch: %d %d\n",
cap->abs_touch_major.minimum,
cap->abs_touch_major.maximum);
if (cap->has_width_major)
xf86Msg(X_INFO, "multitouch: width: %d %d\n",
cap->abs_width_major.minimum,
cap->abs_width_major.maximum);
if (cap->has_orientation)
xf86Msg(X_INFO, "multitouch: orientation: %d %d\n",
cap->abs_orientation.minimum,
cap->abs_orientation.maximum);
if (cap->has_position_x)
xf86Msg(X_INFO, "multitouch: position_x: %d %d\n",
cap->abs_position_x.minimum,
cap->abs_position_x.maximum);
if (cap->has_position_y)
xf86Msg(X_INFO, "multitouch: position_y: %d %d\n",
cap->abs_position_y.minimum,
cap->abs_position_y.maximum);
}
////////////////////////////////////////////////////////
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