dovecot-2.0: Added array_foreach() and array_foreach_modifiable().

[dovecot at dovecot.org]

details:   http://hg.dovecot.org/dovecot-2.0/rev/ada435a92e93
changeset: 9996:ada435a92e93
user:      Timo Sirainen <tss at iki.fi>
date:      Thu Oct 08 02:54:45 2009 -0400
description:
Added array_foreach() and array_foreach_modifiable().

diffstat:

1 file changed, 25 insertions(+)
src/lib/array.h |   25 +++++++++++++++++++++++++

diffs (35 lines):

diff -r c20d6f518451 -r ada435a92e93 src/lib/array.h
--- a/src/lib/array.h	Thu Oct 08 01:37:57 2009 -0400
+++ b/src/lib/array.h	Thu Oct 08 02:54:45 2009 -0400
@@ -53,6 +53,31 @@
 #  define ARRAY_TYPE_CHECK(array, data) 0
 #endif
 
+/* usage: struct foo *foo; array_foreach(foo_arr, foo) { .. } */
+#if (defined(__STDC__) && __STDC_VERSION__ >= 199901L)
+#  define array_foreach(array, elem) \
+	for (const void *elem ## __foreach_end = \
+		(const char *)(elem = *(array)->v) + (array)->arr.buffer->used; \
+	     elem != elem ## __foreach_end; (elem)++)
+#  define array_foreach_modifiable(array, elem) \
+	for (const void *elem ## _end = \
+		(const char *)(elem = ARRAY_TYPE_CAST_MODIFIABLE(array) \
+			buffer_get_modifiable_data((array)->arr.buffer, NULL)) + \
+			(array)->arr.buffer->used; \
+	 elem != elem ## _end; elem++)
+#else
+#  define array_foreach(array, elem) \
+	for (elem = *(array)->v; \
+	     elem != CONST_PTR_OFFSET(*(array)->v, (array)->arr.buffer->used); \
+	     (elem)++)
+#  define array_foreach_modifiable(array, elem) \
+	for (elem = ARRAY_TYPE_CAST_MODIFIABLE(array) \
+			buffer_get_modifiable_data((array)->arr.buffer, NULL)) + \
+			(array)->arr.buffer->used; \
+	     elem != CONST_PTR_OFFSET(*(array)->v, (array)->arr.buffer->used); \
+	     (elem)++)
+#endif
+
 static inline void
 array_create_from_buffer_i(struct array *array, buffer_t *buffer,
 			   size_t element_size)