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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"
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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