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shared: add nm_pgbytes_hash()/nm_pgbytes_equal()

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For hashing of a pointer to a GBytes*.

This is useful if your key is a GBytes array, and the
first field in your to be hashed struct.
This commit is contained in:
Thomas Haller 2020-03-20 22:47:40 +01:00
parent b1503d8a72
commit 573b02f7d7
2 changed files with 27 additions and 0 deletions
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22
shared/nm-glib-aux/nm-hash-utils.c
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@ -257,3 +257,25 @@ nm_ppdirect_equal (gconstpointer a, gconstpointer b)
return **s1 == **s2;
}
/*****************************************************************************/
guint
nm_pgbytes_hash (gconstpointer p)
{
GBytes *const*ptr = p;
gconstpointer arr;
gsize len;
arr = g_bytes_get_data (*ptr, &len);
return nm_hash_mem (1470631313u, arr, len);
}
gboolean
nm_pgbytes_equal (gconstpointer a, gconstpointer b)
{
GBytes *const*ptr_a = a;
GBytes *const*ptr_b = b;
return g_bytes_equal (*ptr_a, *ptr_b);
}

5
shared/nm-glib-aux/nm-hash-utils.h
View file

@ -314,6 +314,11 @@ gboolean nm_ppdirect_equal (gconstpointer a, gconstpointer b);
/*****************************************************************************/
guint nm_pgbytes_hash (gconstpointer p);
gboolean nm_pgbytes_equal (gconstpointer a, gconstpointer b);
/*****************************************************************************/
#define NM_HASH_OBFUSCATE_PTR_FMT "%016" G_GINT64_MODIFIER "x"
/* sometimes we want to log a pointer directly, for providing context/information about