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#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include "util.h"
gchar *avahi_get_host_name(void) {
#ifdef HOST_NAME_MAX
char t[HOST_NAME_MAX];
#else
char t[256];
#endif
gethostname(t, sizeof(t));
t[sizeof(t)-1] = 0;
return avahi_normalize_name(t);
}
gchar *avahi_normalize_name(const gchar *s) {
size_t l;
g_assert(s);
l = strlen(s);
if (!l)
return g_strdup(".");
if (s[l-1] == '.')
return g_strdup(s);
return g_strdup_printf("%s.", s);
}
gint avahi_timeval_compare(const GTimeVal *a, const GTimeVal *b) {
g_assert(a);
g_assert(b);
if (a->tv_sec < b->tv_sec)
return -1;
if (a->tv_sec > b->tv_sec)
return 1;
if (a->tv_usec < b->tv_usec)
return -1;
if (a->tv_usec > b->tv_usec)
return 1;
return 0;
}
glong avahi_timeval_diff(const GTimeVal *a, const GTimeVal *b) {
g_assert(a);
g_assert(b);
if (avahi_timeval_compare(a, b) < 0)
return avahi_timeval_diff(b, a);
return ((glong) a->tv_sec - b->tv_sec)*1000000 + a->tv_usec - b->tv_usec;
}
gint avahi_set_cloexec(gint fd) {
gint n;
g_assert(fd >= 0);
if ((n = fcntl(fd, F_GETFD)) < 0)
return -1;
if (n & FD_CLOEXEC)
return 0;
return fcntl(fd, F_SETFD, n|FD_CLOEXEC);
}
gint avahi_set_nonblock(gint fd) {
gint n;
g_assert(fd >= 0);
if ((n = fcntl(fd, F_GETFL)) < 0)
return -1;
if (n & O_NONBLOCK)
return 0;
return fcntl(fd, F_SETFL, n|O_NONBLOCK);
}
gint avahi_wait_for_write(gint fd) {
fd_set fds;
gint r;
FD_ZERO(&fds);
FD_SET(fd, &fds);
if ((r = select(fd+1, NULL, &fds, NULL, NULL)) < 0) {
g_message("select() failed: %s", strerror(errno));
return -1;
}
g_assert(r > 0);
return 0;
}
GTimeVal *avahi_elapse_time(GTimeVal *tv, guint msec, guint jitter) {
g_assert(tv);
g_get_current_time(tv);
if (msec)
g_time_val_add(tv, msec*1000);
if (jitter)
g_time_val_add(tv, g_random_int_range(0, jitter) * 1000);
return tv;
}
gint avahi_age(const GTimeVal *a) {
GTimeVal now;
g_assert(a);
g_get_current_time(&now);
return avahi_timeval_diff(&now, a);
}
gboolean avahi_domain_cmp(const gchar *a, const gchar *b) {
int escaped_a = 0, escaped_b = 0;
g_assert(a);
g_assert(b);
for (;;) {
/* Check for escape characters "\" */
if ((escaped_a = *a == '\\'))
a ++;
if ((escaped_b = *b == '\\'))
b++;
/* Check for string end */
if (*a == 0 && *b == 0)
return 0;
if (*a == 0 && !escaped_b && *b == '.' && *(b+1) == 0)
return 0;
if (!escaped_a && *a == '.' && *(a+1) == 0 && *b == 0)
return 0;
/* Compare characters */
if (escaped_a == escaped_b && *a != *b)
return *a < *b ? -1 : 1;
/* Next characters */
a++;
b++;
}
}
gboolean avahi_domain_equal(const gchar *a, const gchar *b) {
return avahi_domain_cmp(a, b) == 0;
}
guint avahi_domain_hash(const gchar *p) {
char t[256];
strncpy(t, p, sizeof(t)-1);
t[sizeof(t)-1] = 0;
return g_int_hash(t);
}
void avahi_hexdump(gconstpointer p, guint size) {
const guint8 *c = p;
g_assert(p);
printf("Dumping %u bytes from %p:\n", size, p);
while (size > 0) {
guint i;
for (i = 0; i < 16; i++) {
if (i < size)
printf("%02x ", c[i]);
else
printf(" ");
}
for (i = 0; i < 16; i++) {
if (i < size)
printf("%c", c[i] >= 32 && c[i] < 127 ? c[i] : '.');
else
printf(" ");
}
printf("\n");
c += 16;
if (size <= 16)
break;
size -= 16;
}
}
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