mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-15 20:29:48 +00:00
5e215f9bfd
a setter and fix some comments. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174462 91177308-0d34-0410-b5e6-96231b3b80d8
356 lines
14 KiB
C++
356 lines
14 KiB
C++
//===-- DataExtractor.h -----------------------------------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_SUPPORT_DATAEXTRACTOR_H
|
|
#define LLVM_SUPPORT_DATAEXTRACTOR_H
|
|
|
|
#include "llvm/ADT/DenseMap.h"
|
|
#include "llvm/ADT/StringRef.h"
|
|
#include "llvm/Support/DataTypes.h"
|
|
|
|
namespace llvm {
|
|
class DataExtractor {
|
|
StringRef Data;
|
|
uint8_t IsLittleEndian;
|
|
uint8_t AddressSize;
|
|
public:
|
|
/// Construct with a buffer that is owned by the caller.
|
|
///
|
|
/// This constructor allows us to use data that is owned by the
|
|
/// caller. The data must stay around as long as this object is
|
|
/// valid.
|
|
DataExtractor(StringRef Data, bool IsLittleEndian, uint8_t AddressSize)
|
|
: Data(Data), IsLittleEndian(IsLittleEndian), AddressSize(AddressSize) {}
|
|
|
|
/// \brief Get the data pointed to by this extractor.
|
|
StringRef getData() const { return Data; }
|
|
/// \brief Get the endianess for this extractor.
|
|
bool isLittleEndian() const { return IsLittleEndian; }
|
|
/// \brief Get the address size for this extractor.
|
|
uint8_t getAddressSize() const { return AddressSize; }
|
|
/// \brief Set the address size for this extractor.
|
|
void setAddressSize(uint8_t Size) { AddressSize = Size; }
|
|
|
|
/// Extract a C string from \a *offset_ptr.
|
|
///
|
|
/// Returns a pointer to a C String from the data at the offset
|
|
/// pointed to by \a offset_ptr. A variable length NULL terminated C
|
|
/// string will be extracted and the \a offset_ptr will be
|
|
/// updated with the offset of the byte that follows the NULL
|
|
/// terminator byte.
|
|
///
|
|
/// @param[in,out] offset_ptr
|
|
/// A pointer to an offset within the data that will be advanced
|
|
/// by the appropriate number of bytes if the value is extracted
|
|
/// correctly. If the offset is out of bounds or there are not
|
|
/// enough bytes to extract this value, the offset will be left
|
|
/// unmodified.
|
|
///
|
|
/// @return
|
|
/// A pointer to the C string value in the data. If the offset
|
|
/// pointed to by \a offset_ptr is out of bounds, or if the
|
|
/// offset plus the length of the C string is out of bounds,
|
|
/// NULL will be returned.
|
|
const char *getCStr(uint32_t *offset_ptr) const;
|
|
|
|
/// Extract an unsigned integer of size \a byte_size from \a
|
|
/// *offset_ptr.
|
|
///
|
|
/// Extract a single unsigned integer value and update the offset
|
|
/// pointed to by \a offset_ptr. The size of the extracted integer
|
|
/// is specified by the \a byte_size argument. \a byte_size should
|
|
/// have a value greater than or equal to one and less than or equal
|
|
/// to eight since the return value is 64 bits wide. Any
|
|
/// \a byte_size values less than 1 or greater than 8 will result in
|
|
/// nothing being extracted, and zero being returned.
|
|
///
|
|
/// @param[in,out] offset_ptr
|
|
/// A pointer to an offset within the data that will be advanced
|
|
/// by the appropriate number of bytes if the value is extracted
|
|
/// correctly. If the offset is out of bounds or there are not
|
|
/// enough bytes to extract this value, the offset will be left
|
|
/// unmodified.
|
|
///
|
|
/// @param[in] byte_size
|
|
/// The size in byte of the integer to extract.
|
|
///
|
|
/// @return
|
|
/// The unsigned integer value that was extracted, or zero on
|
|
/// failure.
|
|
uint64_t getUnsigned(uint32_t *offset_ptr, uint32_t byte_size) const;
|
|
|
|
/// Extract an signed integer of size \a byte_size from \a *offset_ptr.
|
|
///
|
|
/// Extract a single signed integer value (sign extending if required)
|
|
/// and update the offset pointed to by \a offset_ptr. The size of
|
|
/// the extracted integer is specified by the \a byte_size argument.
|
|
/// \a byte_size should have a value greater than or equal to one
|
|
/// and less than or equal to eight since the return value is 64
|
|
/// bits wide. Any \a byte_size values less than 1 or greater than
|
|
/// 8 will result in nothing being extracted, and zero being returned.
|
|
///
|
|
/// @param[in,out] offset_ptr
|
|
/// A pointer to an offset within the data that will be advanced
|
|
/// by the appropriate number of bytes if the value is extracted
|
|
/// correctly. If the offset is out of bounds or there are not
|
|
/// enough bytes to extract this value, the offset will be left
|
|
/// unmodified.
|
|
///
|
|
/// @param[in] size
|
|
/// The size in bytes of the integer to extract.
|
|
///
|
|
/// @return
|
|
/// The sign extended signed integer value that was extracted,
|
|
/// or zero on failure.
|
|
int64_t getSigned(uint32_t *offset_ptr, uint32_t size) const;
|
|
|
|
//------------------------------------------------------------------
|
|
/// Extract an pointer from \a *offset_ptr.
|
|
///
|
|
/// Extract a single pointer from the data and update the offset
|
|
/// pointed to by \a offset_ptr. The size of the extracted pointer
|
|
/// is \a getAddressSize(), so the address size has to be
|
|
/// set correctly prior to extracting any pointer values.
|
|
///
|
|
/// @param[in,out] offset_ptr
|
|
/// A pointer to an offset within the data that will be advanced
|
|
/// by the appropriate number of bytes if the value is extracted
|
|
/// correctly. If the offset is out of bounds or there are not
|
|
/// enough bytes to extract this value, the offset will be left
|
|
/// unmodified.
|
|
///
|
|
/// @return
|
|
/// The extracted pointer value as a 64 integer.
|
|
uint64_t getAddress(uint32_t *offset_ptr) const {
|
|
return getUnsigned(offset_ptr, AddressSize);
|
|
}
|
|
|
|
/// Extract a uint8_t value from \a *offset_ptr.
|
|
///
|
|
/// Extract a single uint8_t from the binary data at the offset
|
|
/// pointed to by \a offset_ptr, and advance the offset on success.
|
|
///
|
|
/// @param[in,out] offset_ptr
|
|
/// A pointer to an offset within the data that will be advanced
|
|
/// by the appropriate number of bytes if the value is extracted
|
|
/// correctly. If the offset is out of bounds or there are not
|
|
/// enough bytes to extract this value, the offset will be left
|
|
/// unmodified.
|
|
///
|
|
/// @return
|
|
/// The extracted uint8_t value.
|
|
uint8_t getU8(uint32_t *offset_ptr) const;
|
|
|
|
/// Extract \a count uint8_t values from \a *offset_ptr.
|
|
///
|
|
/// Extract \a count uint8_t values from the binary data at the
|
|
/// offset pointed to by \a offset_ptr, and advance the offset on
|
|
/// success. The extracted values are copied into \a dst.
|
|
///
|
|
/// @param[in,out] offset_ptr
|
|
/// A pointer to an offset within the data that will be advanced
|
|
/// by the appropriate number of bytes if the value is extracted
|
|
/// correctly. If the offset is out of bounds or there are not
|
|
/// enough bytes to extract this value, the offset will be left
|
|
/// unmodified.
|
|
///
|
|
/// @param[out] dst
|
|
/// A buffer to copy \a count uint8_t values into. \a dst must
|
|
/// be large enough to hold all requested data.
|
|
///
|
|
/// @param[in] count
|
|
/// The number of uint8_t values to extract.
|
|
///
|
|
/// @return
|
|
/// \a dst if all values were properly extracted and copied,
|
|
/// NULL otherise.
|
|
uint8_t *getU8(uint32_t *offset_ptr, uint8_t *dst, uint32_t count) const;
|
|
|
|
//------------------------------------------------------------------
|
|
/// Extract a uint16_t value from \a *offset_ptr.
|
|
///
|
|
/// Extract a single uint16_t from the binary data at the offset
|
|
/// pointed to by \a offset_ptr, and update the offset on success.
|
|
///
|
|
/// @param[in,out] offset_ptr
|
|
/// A pointer to an offset within the data that will be advanced
|
|
/// by the appropriate number of bytes if the value is extracted
|
|
/// correctly. If the offset is out of bounds or there are not
|
|
/// enough bytes to extract this value, the offset will be left
|
|
/// unmodified.
|
|
///
|
|
/// @return
|
|
/// The extracted uint16_t value.
|
|
//------------------------------------------------------------------
|
|
uint16_t getU16(uint32_t *offset_ptr) const;
|
|
|
|
/// Extract \a count uint16_t values from \a *offset_ptr.
|
|
///
|
|
/// Extract \a count uint16_t values from the binary data at the
|
|
/// offset pointed to by \a offset_ptr, and advance the offset on
|
|
/// success. The extracted values are copied into \a dst.
|
|
///
|
|
/// @param[in,out] offset_ptr
|
|
/// A pointer to an offset within the data that will be advanced
|
|
/// by the appropriate number of bytes if the value is extracted
|
|
/// correctly. If the offset is out of bounds or there are not
|
|
/// enough bytes to extract this value, the offset will be left
|
|
/// unmodified.
|
|
///
|
|
/// @param[out] dst
|
|
/// A buffer to copy \a count uint16_t values into. \a dst must
|
|
/// be large enough to hold all requested data.
|
|
///
|
|
/// @param[in] count
|
|
/// The number of uint16_t values to extract.
|
|
///
|
|
/// @return
|
|
/// \a dst if all values were properly extracted and copied,
|
|
/// NULL otherise.
|
|
uint16_t *getU16(uint32_t *offset_ptr, uint16_t *dst, uint32_t count) const;
|
|
|
|
/// Extract a uint32_t value from \a *offset_ptr.
|
|
///
|
|
/// Extract a single uint32_t from the binary data at the offset
|
|
/// pointed to by \a offset_ptr, and update the offset on success.
|
|
///
|
|
/// @param[in,out] offset_ptr
|
|
/// A pointer to an offset within the data that will be advanced
|
|
/// by the appropriate number of bytes if the value is extracted
|
|
/// correctly. If the offset is out of bounds or there are not
|
|
/// enough bytes to extract this value, the offset will be left
|
|
/// unmodified.
|
|
///
|
|
/// @return
|
|
/// The extracted uint32_t value.
|
|
uint32_t getU32(uint32_t *offset_ptr) const;
|
|
|
|
/// Extract \a count uint32_t values from \a *offset_ptr.
|
|
///
|
|
/// Extract \a count uint32_t values from the binary data at the
|
|
/// offset pointed to by \a offset_ptr, and advance the offset on
|
|
/// success. The extracted values are copied into \a dst.
|
|
///
|
|
/// @param[in,out] offset_ptr
|
|
/// A pointer to an offset within the data that will be advanced
|
|
/// by the appropriate number of bytes if the value is extracted
|
|
/// correctly. If the offset is out of bounds or there are not
|
|
/// enough bytes to extract this value, the offset will be left
|
|
/// unmodified.
|
|
///
|
|
/// @param[out] dst
|
|
/// A buffer to copy \a count uint32_t values into. \a dst must
|
|
/// be large enough to hold all requested data.
|
|
///
|
|
/// @param[in] count
|
|
/// The number of uint32_t values to extract.
|
|
///
|
|
/// @return
|
|
/// \a dst if all values were properly extracted and copied,
|
|
/// NULL otherise.
|
|
uint32_t *getU32(uint32_t *offset_ptr, uint32_t *dst, uint32_t count) const;
|
|
|
|
/// Extract a uint64_t value from \a *offset_ptr.
|
|
///
|
|
/// Extract a single uint64_t from the binary data at the offset
|
|
/// pointed to by \a offset_ptr, and update the offset on success.
|
|
///
|
|
/// @param[in,out] offset_ptr
|
|
/// A pointer to an offset within the data that will be advanced
|
|
/// by the appropriate number of bytes if the value is extracted
|
|
/// correctly. If the offset is out of bounds or there are not
|
|
/// enough bytes to extract this value, the offset will be left
|
|
/// unmodified.
|
|
///
|
|
/// @return
|
|
/// The extracted uint64_t value.
|
|
uint64_t getU64(uint32_t *offset_ptr) const;
|
|
|
|
/// Extract \a count uint64_t values from \a *offset_ptr.
|
|
///
|
|
/// Extract \a count uint64_t values from the binary data at the
|
|
/// offset pointed to by \a offset_ptr, and advance the offset on
|
|
/// success. The extracted values are copied into \a dst.
|
|
///
|
|
/// @param[in,out] offset_ptr
|
|
/// A pointer to an offset within the data that will be advanced
|
|
/// by the appropriate number of bytes if the value is extracted
|
|
/// correctly. If the offset is out of bounds or there are not
|
|
/// enough bytes to extract this value, the offset will be left
|
|
/// unmodified.
|
|
///
|
|
/// @param[out] dst
|
|
/// A buffer to copy \a count uint64_t values into. \a dst must
|
|
/// be large enough to hold all requested data.
|
|
///
|
|
/// @param[in] count
|
|
/// The number of uint64_t values to extract.
|
|
///
|
|
/// @return
|
|
/// \a dst if all values were properly extracted and copied,
|
|
/// NULL otherise.
|
|
uint64_t *getU64(uint32_t *offset_ptr, uint64_t *dst, uint32_t count) const;
|
|
|
|
/// Extract a signed LEB128 value from \a *offset_ptr.
|
|
///
|
|
/// Extracts an signed LEB128 number from this object's data
|
|
/// starting at the offset pointed to by \a offset_ptr. The offset
|
|
/// pointed to by \a offset_ptr will be updated with the offset of
|
|
/// the byte following the last extracted byte.
|
|
///
|
|
/// @param[in,out] offset_ptr
|
|
/// A pointer to an offset within the data that will be advanced
|
|
/// by the appropriate number of bytes if the value is extracted
|
|
/// correctly. If the offset is out of bounds or there are not
|
|
/// enough bytes to extract this value, the offset will be left
|
|
/// unmodified.
|
|
///
|
|
/// @return
|
|
/// The extracted signed integer value.
|
|
int64_t getSLEB128(uint32_t *offset_ptr) const;
|
|
|
|
/// Extract a unsigned LEB128 value from \a *offset_ptr.
|
|
///
|
|
/// Extracts an unsigned LEB128 number from this object's data
|
|
/// starting at the offset pointed to by \a offset_ptr. The offset
|
|
/// pointed to by \a offset_ptr will be updated with the offset of
|
|
/// the byte following the last extracted byte.
|
|
///
|
|
/// @param[in,out] offset_ptr
|
|
/// A pointer to an offset within the data that will be advanced
|
|
/// by the appropriate number of bytes if the value is extracted
|
|
/// correctly. If the offset is out of bounds or there are not
|
|
/// enough bytes to extract this value, the offset will be left
|
|
/// unmodified.
|
|
///
|
|
/// @return
|
|
/// The extracted unsigned integer value.
|
|
uint64_t getULEB128(uint32_t *offset_ptr) const;
|
|
|
|
/// Test the validity of \a offset.
|
|
///
|
|
/// @return
|
|
/// \b true if \a offset is a valid offset into the data in this
|
|
/// object, \b false otherwise.
|
|
bool isValidOffset(uint32_t offset) const { return Data.size() > offset; }
|
|
|
|
/// Test the availability of \a length bytes of data from \a offset.
|
|
///
|
|
/// @return
|
|
/// \b true if \a offset is a valid offset and there are \a
|
|
/// length bytes available at that offset, \b false otherwise.
|
|
bool isValidOffsetForDataOfSize(uint32_t offset, uint32_t length) const {
|
|
return offset + length >= offset && isValidOffset(offset + length - 1);
|
|
}
|
|
};
|
|
|
|
} // namespace llvm
|
|
|
|
#endif
|