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Exception instead of assigning 0 in case of wrong vector length

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This commit is contained in:
Pieter Wuille 2014-04-19 23:25:44 +02:00
parent eb2cbd754d
commit 4d480c8a3f
2 changed files with 15 additions and 10 deletions
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10
src/test/uint256_tests.cpp
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@ -160,11 +160,11 @@ BOOST_AUTO_TEST_CASE( basics ) // constructors, equality, inequality
tmpS = ~R2S; BOOST_CHECK(tmpS == ~R2S); tmpS = ~R2S; BOOST_CHECK(tmpS == ~R2S);
tmpS = ~MaxS; BOOST_CHECK(tmpS == ~MaxS); tmpS = ~MaxS; BOOST_CHECK(tmpS == ~MaxS);
// Wrong length must give 0 // Wrong length must throw exception.
BOOST_CHECK(uint256(std::vector<unsigned char>(OneArray,OneArray+31)) == 0); BOOST_CHECK_THROW(uint256(std::vector<unsigned char>(OneArray,OneArray+31)), uint_error);
BOOST_CHECK(uint256(std::vector<unsigned char>(OneArray,OneArray+20)) == 0); BOOST_CHECK_THROW(uint256(std::vector<unsigned char>(OneArray,OneArray+20)), uint_error);
BOOST_CHECK(uint160(std::vector<unsigned char>(OneArray,OneArray+32)) == 0); BOOST_CHECK_THROW(uint160(std::vector<unsigned char>(OneArray,OneArray+32)), uint_error);
BOOST_CHECK(uint160(std::vector<unsigned char>(OneArray,OneArray+19)) == 0); BOOST_CHECK_THROW(uint160(std::vector<unsigned char>(OneArray,OneArray+19)), uint_error);
} }
void shiftArrayRight(unsigned char* to, const unsigned char* from, unsigned int arrayLength, unsigned int bitsToShift) void shiftArrayRight(unsigned char* to, const unsigned char* from, unsigned int arrayLength, unsigned int bitsToShift)

15
src/uint256.h
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@ -6,6 +6,8 @@
#ifndef BITCOIN_UINT256_H #ifndef BITCOIN_UINT256_H
#define BITCOIN_UINT256_H #define BITCOIN_UINT256_H
#include <assert.h>
#include <stdexcept>
#include <stdint.h> #include <stdint.h>
#include <stdio.h> #include <stdio.h>
#include <string> #include <string>
@ -19,6 +21,11 @@ inline signed char HexDigit(char c)
return p_util_hexdigit[(unsigned char)c]; return p_util_hexdigit[(unsigned char)c];
} }
class uint_error : public std::runtime_error {
public:
explicit uint_error(const std::string& str) : std::runtime_error(str) {}
};
/** Template base class for unsigned big integers. */ /** Template base class for unsigned big integers. */
template<unsigned int BITS> template<unsigned int BITS>
class base_uint class base_uint
@ -62,11 +69,9 @@ public:
explicit base_uint(const std::vector<unsigned char>& vch) explicit base_uint(const std::vector<unsigned char>& vch)
{ {
if (vch.size() == sizeof(pn)) { if (vch.size() != sizeof(pn))
memcpy(pn, &vch[0], sizeof(pn)); throw uint_error("Converting vector of wrong size to base_uint");
} else { memcpy(pn, &vch[0], sizeof(pn));
*this = 0;
}
} }
bool operator!() const bool operator!() const