ARCHIVE/rippled
1
0
Fork 0
mirror of https://github.com/XRPLF/rippled.git synced 2025-11-24 13:05:53 +00:00
Code Issues Packages Projects Releases Wiki Activity

Some fixes for broken math in this code.

Browse Source
This commit is contained in:
JoelKatz
2012-11-12 15:55:38 -08:00
parent c725d78e24
commit a6e709e5ff
1 changed files with 23 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

35
src/cpp/ripple/uint256.h
View File

@@ -23,7 +23,7 @@
#endif #endif
// These classes all store their values internally // These classes all store their values internally
// in little-endian form // in big-endian form
inline int Testuint256AdHoc(std::vector<std::string> vArg); inline int Testuint256AdHoc(std::vector<std::string> vArg);
@@ -36,7 +36,7 @@ protected:
enum { WIDTH=BITS/32 }; enum { WIDTH=BITS/32 };
// This is really big-endian in byte order. // This is really big-endian in byte order.
// We use unsigned int for speed. // We sometimes use unsigned int for speed.
unsigned int pn[WIDTH]; unsigned int pn[WIDTH];
public: public:
@@ -105,10 +105,12 @@ public:
base_uint& operator++() base_uint& operator++()
{ {
// prefix operator // prefix operator
int i = WIDTH; for (int i = WIDTH - 1; i >= 0; --i)
{
while (i-- && !++pn[i]) pn[i] = htobe32(be32toh(pn[i]) + 1);
; if (pn[i] != 0)
break;
}
return *this; return *this;
} }
@@ -124,10 +126,13 @@ public:
base_uint& operator--() base_uint& operator--()
{ {
int i = WIDTH; for (int i = WIDTH - 1; i >= 0; --i)
{
while (i-- && !pn[i]--) uint32 prev = pn[i];
; pn[i] = htobe32(be32toh(pn[i]) - 1);
if (prev != 0)
break;
}
return *this; return *this;
} }
@@ -169,10 +174,14 @@ public:
const unsigned char* pAEnd = a.end(); const unsigned char* pAEnd = a.end();
const unsigned char* pB = b.begin(); const unsigned char* pB = b.begin();
while (pA != pAEnd && *pA == *pB) while (*pA == *pB)
pA++, pB++; {
if (++pA == pAEnd)
return 0;
++pB;
}
return pA == pAEnd ? 0 : *pA < *pB ? -1 : *pA > *pB ? 1 : 0; return (*pA < *pB) ? -1 : 1;
} }
friend inline bool operator<(const base_uint& a, const base_uint& b) friend inline bool operator<(const base_uint& a, const base_uint& b)