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BMessage: avoid code duplication in Unflatten

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The buffer version of Unflatten can be implemented by wrapping the
buffer in a BMemoryIO. This allows sharing more code, and the BDataIO
version of Unflatten has some extra error checks.

Fixes #11670.
This commit is contained in:
Adrien Destugues
2015-01-05 11:53:07 +01:00
parent 0622135673
commit 62ede2e6a2
1 changed files with 2 additions and 59 deletions
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src/kits/app/Message.cpp
+2 -59
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@@ -1274,65 +1274,8 @@ BMessage::Unflatten(const char* flatBuffer)
if (flatBuffer == NULL) if (flatBuffer == NULL)
return B_BAD_VALUE; return B_BAD_VALUE;
uint32 format = *(uint32*)flatBuffer; BMemoryIO io(flatBuffer, SIZE_MAX);
if (format != MESSAGE_FORMAT_HAIKU) return Unflatten(&io);
return BPrivate::MessageAdapter::Unflatten(format, this, flatBuffer);
// native message unflattening
_Clear();
fHeader = (message_header*)malloc(sizeof(message_header));
if (fHeader == NULL)
return B_NO_MEMORY;
memcpy(fHeader, flatBuffer, sizeof(message_header));
flatBuffer += sizeof(message_header);
if (fHeader->format != MESSAGE_FORMAT_HAIKU
|| (fHeader->flags & MESSAGE_FLAG_VALID) == 0) {
_InitHeader();
return B_BAD_VALUE;
}
what = fHeader->what;
if ((fHeader->flags & MESSAGE_FLAG_PASS_BY_AREA) != 0
&& fHeader->message_area >= 0) {
status_t result = _Reference();
if (result != B_OK) {
_InitHeader();
return result;
}
} else {
fHeader->message_area = -1;
if (fHeader->field_count > 0) {
size_t fieldsSize = fHeader->field_count * sizeof(field_header);
fFields = (field_header*)malloc(fieldsSize);
if (fFields == NULL) {
_InitHeader();
return B_NO_MEMORY;
}
memcpy(fFields, flatBuffer, fieldsSize);
flatBuffer += fieldsSize;
}
if (fHeader->data_size > 0) {
fData = (uint8*)malloc(fHeader->data_size);
if (fData == NULL) {
free(fFields);
fFields = NULL;
_InitHeader();
return B_NO_MEMORY;
}
memcpy(fData, flatBuffer, fHeader->data_size);
}
}
return _ValidateMessage();
} }