move the sources to libavahi-core/

git-svn-id: file:///home/lennart/svn/public/avahi/trunk@50 941a03a8-eaeb-0310-b9a0-b1bbd8fe43fe

1 files changed, 214 insertions, 0 deletions

diff --git a/libavahi-core/util.c b/libavahi-core/util.c
new file mode 100644
index 0000000..270a48f
--- /dev/null
+++ b/libavahi-core/util.c
@@ -0,0 +1,214 @@
+#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;
+    }
+}