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authorThe Android Open Source Project <initial-contribution@android.com>2009-03-03 18:28:14 -0800
committerThe Android Open Source Project <initial-contribution@android.com>2009-03-03 18:28:14 -0800
commitf72d5de56a522ac3be03873bdde26f23a5eeeb3c (patch)
tree4b825dc642cb6eb9a060e54bf8d69288fbee4904 /libdex/Leb128.c
parent31e30105703263782efd450d356cd67ea01af3b7 (diff)
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auto import from //depot/cupcake/@135843
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diff --git a/libdex/Leb128.c b/libdex/Leb128.c
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-/*
- * Copyright (C) 2008 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/*
- * Functions for interpreting LEB128 (little endian base 128) values
- */
-
-#include "Leb128.h"
-
-/*
- * Reads an unsigned LEB128 value, updating the given pointer to point
- * just past the end of the read value and also indicating whether the
- * value was syntactically valid. The only syntactically *invalid*
- * values are ones that are five bytes long where the final byte has
- * any but the low-order four bits set. Additionally, if the limit is
- * passed as non-NULL and bytes would need to be read past the limit,
- * then the read is considered invalid.
- */
-int readAndVerifyUnsignedLeb128(const u1** pStream, const u1* limit,
- bool* okay) {
- const u1* ptr = *pStream;
- int result = readUnsignedLeb128(pStream);
-
- if (((limit != NULL) && (*pStream > limit))
- || (((*pStream - ptr) == 5) && (ptr[4] > 0x0f))) {
- *okay = false;
- }
-
- return result;
-}
-
-/*
- * Reads a signed LEB128 value, updating the given pointer to point
- * just past the end of the read value and also indicating whether the
- * value was syntactically valid. The only syntactically *invalid*
- * values are ones that are five bytes long where the final byte has
- * any but the low-order four bits set. Additionally, if the limit is
- * passed as non-NULL and bytes would need to be read past the limit,
- * then the read is considered invalid.
- */
-int readAndVerifySignedLeb128(const u1** pStream, const u1* limit,
- bool* okay) {
- const u1* ptr = *pStream;
- int result = readSignedLeb128(pStream);
-
- if (((limit != NULL) && (*pStream > limit))
- || (((*pStream - ptr) == 5) && (ptr[4] > 0x0f))) {
- *okay = false;
- }
-
- return result;
-}