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31 lines
1.3 KiB
31 lines
1.3 KiB
8 months ago
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From 01f312e212e8ad095800856a7247a0a2d85cc99d Mon Sep 17 00:00:00 2001
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From: Dan Streetman <ddstreet@ieee.org>
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Date: Thu, 2 Feb 2023 15:58:10 -0500
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Subject: [PATCH] basic/macro: add macro to iterate variadic args
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(cherry picked from commit e179f2d89c9f0c951636d74de00136b4075cd1ac)
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Related: RHEL-16182
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---
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src/basic/macro.h | 9 +++++++++
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1 file changed, 9 insertions(+)
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diff --git a/src/basic/macro.h b/src/basic/macro.h
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index 72a2c7267e..9c36683ef9 100644
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--- a/src/basic/macro.h
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+++ b/src/basic/macro.h
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@@ -458,4 +458,13 @@ assert_cc(sizeof(dummy_t) == 0);
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_q && _q > (base) ? &_q[-1] : NULL; \
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})
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+/* Iterate through each variadic arg. All must be the same type as 'entry' or must be implicitly
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+ * convertable. The iteration variable 'entry' must already be defined. */
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+#define VA_ARGS_FOREACH(entry, ...) \
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+ _VA_ARGS_FOREACH(entry, UNIQ_T(_entries_, UNIQ), UNIQ_T(_current_, UNIQ), ##__VA_ARGS__)
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+#define _VA_ARGS_FOREACH(entry, _entries_, _current_, ...) \
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+ for (typeof(entry) _entries_[] = { __VA_ARGS__ }, *_current_ = _entries_; \
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+ ((long)(_current_ - _entries_) < (long)ELEMENTSOF(_entries_)) && ({ entry = *_current_; true; }); \
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+ _current_++)
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+
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#include "log.h"
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