Initial upload v3.4.7

algo/hodl/utilstrencodings.h

@@ -0,0 +1,98 @@
+// Copyright (c) 2009-2010 Satoshi Nakamoto
+// Copyright (c) 2009-2014 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+/**
+ * Utilities for converting data from/to strings.
+ */
+#ifndef BITCOIN_UTILSTRENCODINGS_H
+#define BITCOIN_UTILSTRENCODINGS_H
+
+#include <stdint.h>
+#include <string>
+#include <vector>
+
+#define BEGIN(a)            ((char*)&(a))
+#define END(a)              ((char*)&((&(a))[1]))
+#define UBEGIN(a)           ((unsigned char*)&(a))
+#define UEND(a)             ((unsigned char*)&((&(a))[1]))
+#define ARRAYLEN(array)     (sizeof(array)/sizeof((array)[0]))
+
+/** This is needed because the foreach macro can't get over the comma in pair<t1, t2> */
+#define PAIRTYPE(t1, t2)    std::pair<t1, t2>
+
+std::string SanitizeString(const std::string& str);
+std::vector<unsigned char> ParseHex(const char* psz);
+std::vector<unsigned char> ParseHex(const std::string& str);
+signed char HexDigit(char c);
+bool IsHex(const std::string& str);
+std::vector<unsigned char> DecodeBase64(const char* p, bool* pfInvalid = NULL);
+std::string DecodeBase64(const std::string& str);
+std::string EncodeBase64(const unsigned char* pch, size_t len);
+std::string EncodeBase64(const std::string& str);
+std::vector<unsigned char> DecodeBase32(const char* p, bool* pfInvalid = NULL);
+std::string DecodeBase32(const std::string& str);
+std::string EncodeBase32(const unsigned char* pch, size_t len);
+std::string EncodeBase32(const std::string& str);
+
+std::string i64tostr(int64_t n);
+std::string itostr(int n);
+int64_t atoi64(const char* psz);
+int64_t atoi64(const std::string& str);
+int atoi(const std::string& str);
+
+/**
+ * Convert string to signed 32-bit integer with strict parse error feedback.
+ * @returns true if the entire string could be parsed as valid integer,
+ *   false if not the entire string could be parsed or when overflow or underflow occurred.
+ */
+bool ParseInt32(const std::string& str, int32_t *out);
+
+template<typename T>
+std::string HexStr(const T itbegin, const T itend, bool fSpaces=false)
+{
+    std::string rv;
+    static const char hexmap[16] = { '0', '1', '2', '3', '4', '5', '6', '7',
+                                     '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
+    rv.reserve((itend-itbegin)*3);
+    for(T it = itbegin; it < itend; ++it)
+    {
+        unsigned char val = (unsigned char)(*it);
+        if(fSpaces && it != itbegin)
+            rv.push_back(' ');
+        rv.push_back(hexmap[val>>4]);
+        rv.push_back(hexmap[val&15]);
+    }
+
+    return rv;
+}
+
+template<typename T>
+inline std::string HexStr(const T& vch, bool fSpaces=false)
+{
+    return HexStr(vch.begin(), vch.end(), fSpaces);
+}
+
+/** 
+ * Format a paragraph of text to a fixed width, adding spaces for
+ * indentation to any added line.
+ */
+std::string FormatParagraph(const std::string in, size_t width=79, size_t indent=0);
+
+/**
+ * Timing-attack-resistant comparison.
+ * Takes time proportional to length
+ * of first argument.
+ */
+template <typename T>
+bool TimingResistantEqual(const T& a, const T& b)
+{
+    if (b.size() == 0) return a.size() == 0;
+    size_t accumulator = a.size() ^ b.size();
+    for (size_t i = 0; i < a.size(); i++)
+        accumulator |= a[i] ^ b[i%b.size()];
+    return accumulator == 0;
+}
+
+#endif // BITCOIN_UTILSTRENCODINGS_H