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%{
/* Rely on vasprintf (GNU extension) instead of vsnprintf if
possible... */
#ifdef HAVE_VASPRINTF
#define _GNU_SOURCE
#include <stdio.h>
#endif
#include <xcb/xcb.h>
#include <stdlib.h>
#include <stdarg.h>
#include "xcb_atom.h"
define(`COUNT', 0)dnl
define(`DO', `const xcb_atom_t $1 = define(`COUNT', incr(COUNT))COUNT;')dnl
include(atomlist.m4)`'dnl
%}
%readonly-tables
%pic
%null-strings
%enum
%includes
%compare-strncmp
%struct-type
struct atom_map { int name; xcb_atom_t value; };
%%
define(`COUNT', 0)dnl
define(`DO', `$1,define(`COUNT', incr(COUNT))COUNT')dnl
include(atomlist.m4)`'dnl
%%
static const char atom_names[] =
define(`DO', ` "$1\0"')dnl
include(atomlist.m4);
static const uint16_t atom_name_offsets[] = {
define(`OFFSET', 0)dnl
define(`DO', ` OFFSET,define(`OFFSET', eval(OFFSET+1+len($1)))')dnl
include(atomlist.m4)`'dnl
};
xcb_atom_t intern_atom_predefined(uint16_t name_len, const char *name)
{
const struct atom_map *value = in_word_set(name, name_len);
xcb_atom_t ret = XCB_NONE;
if(value)
ret = value->value;
return ret;
}
intern_atom_fast_cookie_t intern_atom_fast(xcb_connection_t *c, uint8_t only_if_exists, uint16_t name_len, const char *name)
{
intern_atom_fast_cookie_t cookie;
if((cookie.u.atom = intern_atom_predefined(name_len, name)) != XCB_NONE)
{
cookie.tag = TAG_VALUE;
return cookie;
}
cookie.tag = TAG_COOKIE;
cookie.u.cookie = xcb_intern_atom(c, only_if_exists, name_len, name);
return cookie;
}
xcb_atom_t intern_atom_fast_reply(xcb_connection_t *c, intern_atom_fast_cookie_t cookie, xcb_generic_error_t **e)
{
switch(cookie.tag)
{
xcb_intern_atom_reply_t *reply;
case TAG_VALUE:
if(e)
*e = 0;
break;
case TAG_COOKIE:
reply = xcb_intern_atom_reply(c, cookie.u.cookie, e);
if(reply)
{
cookie.u.atom = reply->atom;
free(reply);
}
else
cookie.u.atom = XCB_NONE;
break;
}
return cookie.u.atom;
}
const char *get_atom_name_predefined(xcb_atom_t atom)
{
if(atom <= 0 || atom > (sizeof(atom_name_offsets) / sizeof(*atom_name_offsets)))
return 0;
return atom_names + atom_name_offsets[atom - 1];
}
int get_atom_name(xcb_connection_t *c, xcb_atom_t atom, const char **namep, int *lengthp)
{
static char buf[100];
const char *name = get_atom_name_predefined(atom);
int namelen;
xcb_get_atom_name_cookie_t atomc;
xcb_get_atom_name_reply_t *atomr;
if(name)
{
*namep = name;
*lengthp = strlen(name);
return 1;
}
atomc = xcb_get_atom_name(c, atom);
atomr = xcb_get_atom_name_reply(c, atomc, 0);
if(!atomr)
return 0;
namelen = xcb_get_atom_name_name_length(atomr);
if(namelen > sizeof(buf))
namelen = sizeof(buf);
*lengthp = namelen;
memcpy(buf, xcb_get_atom_name_name(atomr), namelen);
*namep = buf;
free(atomr);
return 1;
}
static char *makename(const char *fmt, ...)
{
char *ret;
int n;
va_list ap;
#ifndef HAVE_VASPRINTF
char *np;
int size = 64;
/* First allocate 'size' bytes, should be enough usually */
if((ret = malloc(size)) == NULL)
return NULL;
while(1)
{
va_start(ap, fmt);
n = vsnprintf(ret, size, fmt, ap);
va_end(ap);
if(n < 0)
return NULL;
if(n < size)
return ret;
size = n + 1;
if((np = realloc(ret, size)) == NULL)
{
free(ret);
return NULL;
}
ret = np;
}
#else
va_start(ap, fmt);
n = vasprintf(&ret, fmt, ap);
va_end(ap);
if(n < 0)
return NULL;
return ret;
#endif
}
char *xcb_atom_name_by_screen(const char *base, uint8_t screen)
{
return makename("%s_S%u", base, screen);
}
char *xcb_atom_name_by_resource(const char *base, uint32_t resource)
{
return makename("%s_R%08X", base, resource);
}
char *xcb_atom_name_unique(const char *base, uint32_t id)
{
if(base)
return makename("%s_U%lu", base, id);
else
return makename("U%lu", id);
}
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