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nuttxgdb/utils.py:add ArrayIterator reverse iterate.

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Signed-off-by: yangao1 <yangao1@xiaomi.com>
This commit is contained in:
yangao1 2024-10-12 20:21:04 +08:00 committed by Xiang Xiao
parent e3b3da3bd1
commit 40efe1af11
1 changed files with 9 additions and 8 deletions
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17
tools/gdb/nuttxgdb/utils.py
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@ -714,33 +714,34 @@ def jsonify(obj, indent=None):
class ArrayIterator:
"""An iterator for gdb array or pointer."""
def __init__(self, array: gdb.Value, maxlen=None):
def __init__(self, array: gdb.Value, maxlen=None, reverse=False):
type_code = array.type.code
if type_code not in (gdb.TYPE_CODE_ARRAY, gdb.TYPE_CODE_PTR):
raise gdb.error(f"Not an array: {array}, type: {array.type}")
if type_code == gdb.TYPE_CODE_ARRAY:
if maxlen is None:
maxlen = nitems(array)
else:
maxlen = min(nitems(array), maxlen)
if n := nitems(array) > 0:
maxlen = min(n, maxlen) if maxlen is not None else n
if maxlen is None:
raise gdb.error("Need to provide array length.")
self.array = array
self.maxlen = maxlen
self.index = 0
self.reverse = reverse
self.index = maxlen - 1 if reverse else 0
def __iter__(self):
return self
def __next__(self) -> gdb.Value:
if self.index >= self.maxlen:
if (not self.reverse and self.index >= self.maxlen) or (
self.reverse and self.index < 0
):
raise StopIteration
value = self.array[self.index]
self.index += 1
self.index = self.index - 1 if self.reverse else self.index + 1
return value