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-rw-r--r--python/flatbuffers/builder.py10
1 files changed, 8 insertions, 2 deletions
diff --git a/python/flatbuffers/builder.py b/python/flatbuffers/builder.py
index 068c413f..4c78d7a6 100644
--- a/python/flatbuffers/builder.py
+++ b/python/flatbuffers/builder.py
@@ -93,7 +93,7 @@ class Builder(object):
The internal buffer is grown as needed.
"""
- if not (0 <= initialSize < (2**UOffsetTFlags.bytewidth - 1)):
+ if not (0 <= initialSize <= self.MaxBufferSize()):
msg = "flatbuffers: Cannot create Builder larger than 2 gigabytes."
raise BuilderSizeError(msg)
@@ -104,6 +104,12 @@ class Builder(object):
self.objectEnd = None
self.vtables = []
+ def MaxBufferSize(self):
+ """
+ Maximum buffer size is 2Gb.
+ """
+ return 2**31
+
def Output(self):
"""
Output returns the portion of the buffer that has been used for
@@ -238,7 +244,7 @@ class Builder(object):
def growByteBuffer(self):
"""Doubles the size of the byteslice, and copies the old data towards
the end of the new buffer (since we build the buffer backwards)."""
- if not len(self.Bytes) <= 2**20:
+ if not len(self.Bytes) <= self.MaxBufferSize():
msg = "flatbuffers: cannot grow buffer beyond 2 gigabytes"
raise BuilderSizeError(msg)