// Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2014 The Bitcoin developers
+// 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.
#include <cstdlib>
#include <cstring>
#include <errno.h>
+#include <iomanip>
#include <limits>
using namespace std;
return strResult;
}
+string SanitizeFilename(const string& str)
+{
+ /**
+ * safeChars chosen to restrict filename, keeping it simple to avoid cross-platform issues.
+ * http://stackoverflow.com/a/2306003
+ */
+ static string safeChars("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890");
+ string strResult;
+ for (std::string::size_type i = 0; i < str.size(); i++)
+ {
+ if (safeChars.find(str[i]) != std::string::npos)
+ strResult.push_back(str[i]);
+ }
+ return strResult;
+}
+
+std::string HexInt(uint32_t val)
+{
+ std::stringstream ss;
+ ss << std::setfill('0') << std::setw(sizeof(uint32_t) * 2) << std::hex << val;
+ return ss.str();
+}
+
const signed char p_util_hexdigit[256] =
{ -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
return (vchRet.size() == 0) ? string() : string((const char*)&vchRet[0], vchRet.size());
}
+static bool ParsePrechecks(const std::string& str)
+{
+ if (str.empty()) // No empty string allowed
+ return false;
+ if (str.size() >= 1 && (isspace(str[0]) || isspace(str[str.size()-1]))) // No padding allowed
+ return false;
+ if (str.size() != strlen(str.c_str())) // No embedded NUL characters allowed
+ return false;
+ return true;
+}
+
bool ParseInt32(const std::string& str, int32_t *out)
{
+ if (!ParsePrechecks(str))
+ return false;
char *endp = NULL;
errno = 0; // strtol will not set errno if valid
long int n = strtol(str.c_str(), &endp, 10);
- if(out) *out = (int)n;
+ if(out) *out = (int32_t)n;
// Note that strtol returns a *long int*, so even if strtol doesn't report a over/underflow
// we still have to check that the returned value is within the range of an *int32_t*. On 64-bit
// platforms the size of these types may be different.
n <= std::numeric_limits<int32_t>::max();
}
-std::string FormatParagraph(const std::string in, size_t width, size_t indent)
+bool ParseInt64(const std::string& str, int64_t *out)
+{
+ if (!ParsePrechecks(str))
+ return false;
+ char *endp = NULL;
+ errno = 0; // strtoll will not set errno if valid
+ long long int n = strtoll(str.c_str(), &endp, 10);
+ if(out) *out = (int64_t)n;
+ // Note that strtoll returns a *long long int*, so even if strtol doesn't report a over/underflow
+ // we still have to check that the returned value is within the range of an *int64_t*.
+ return endp && *endp == 0 && !errno &&
+ n >= std::numeric_limits<int64_t>::min() &&
+ n <= std::numeric_limits<int64_t>::max();
+}
+
+bool ParseDouble(const std::string& str, double *out)
+{
+ if (!ParsePrechecks(str))
+ return false;
+ if (str.size() >= 2 && str[0] == '0' && str[1] == 'x') // No hexadecimal floats allowed
+ return false;
+ std::istringstream text(str);
+ text.imbue(std::locale::classic());
+ double result;
+ text >> result;
+ if(out) *out = result;
+ return text.eof() && !text.fail();
+}
+
+std::string FormatParagraph(const std::string& in, size_t width, size_t indent)
{
std::stringstream out;
size_t col = 0;
{
return atoi(str.c_str());
}
+
+/** Upper bound for mantissa.
+ * 10^18-1 is the largest arbitrary decimal that will fit in a signed 64-bit integer.
+ * Larger integers cannot consist of arbitrary combinations of 0-9:
+ *
+ * 999999999999999999 1^18-1
+ * 9223372036854775807 (1<<63)-1 (max int64_t)
+ * 9999999999999999999 1^19-1 (would overflow)
+ */
+static const int64_t UPPER_BOUND = 1000000000000000000LL - 1LL;
+
+/** Helper function for ParseFixedPoint */
+static inline bool ProcessMantissaDigit(char ch, int64_t &mantissa, int &mantissa_tzeros)
+{
+ if(ch == '0')
+ ++mantissa_tzeros;
+ else {
+ for (int i=0; i<=mantissa_tzeros; ++i) {
+ if (mantissa > (UPPER_BOUND / 10LL))
+ return false; /* overflow */
+ mantissa *= 10;
+ }
+ mantissa += ch - '0';
+ mantissa_tzeros = 0;
+ }
+ return true;
+}
+
+bool ParseFixedPoint(const std::string &val, int decimals, int64_t *amount_out)
+{
+ int64_t mantissa = 0;
+ int64_t exponent = 0;
+ int mantissa_tzeros = 0;
+ bool mantissa_sign = false;
+ bool exponent_sign = false;
+ int ptr = 0;
+ int end = val.size();
+ int point_ofs = 0;
+
+ if (ptr < end && val[ptr] == '-') {
+ mantissa_sign = true;
+ ++ptr;
+ }
+ if (ptr < end)
+ {
+ if (val[ptr] == '0') {
+ /* pass single 0 */
+ ++ptr;
+ } else if (val[ptr] >= '1' && val[ptr] <= '9') {
+ while (ptr < end && val[ptr] >= '0' && val[ptr] <= '9') {
+ if (!ProcessMantissaDigit(val[ptr], mantissa, mantissa_tzeros))
+ return false; /* overflow */
+ ++ptr;
+ }
+ } else return false; /* missing expected digit */
+ } else return false; /* empty string or loose '-' */
+ if (ptr < end && val[ptr] == '.')
+ {
+ ++ptr;
+ if (ptr < end && val[ptr] >= '0' && val[ptr] <= '9')
+ {
+ while (ptr < end && val[ptr] >= '0' && val[ptr] <= '9') {
+ if (!ProcessMantissaDigit(val[ptr], mantissa, mantissa_tzeros))
+ return false; /* overflow */
+ ++ptr;
+ ++point_ofs;
+ }
+ } else return false; /* missing expected digit */
+ }
+ if (ptr < end && (val[ptr] == 'e' || val[ptr] == 'E'))
+ {
+ ++ptr;
+ if (ptr < end && val[ptr] == '+')
+ ++ptr;
+ else if (ptr < end && val[ptr] == '-') {
+ exponent_sign = true;
+ ++ptr;
+ }
+ if (ptr < end && val[ptr] >= '0' && val[ptr] <= '9') {
+ while (ptr < end && val[ptr] >= '0' && val[ptr] <= '9') {
+ if (exponent > (UPPER_BOUND / 10LL))
+ return false; /* overflow */
+ exponent = exponent * 10 + val[ptr] - '0';
+ ++ptr;
+ }
+ } else return false; /* missing expected digit */
+ }
+ if (ptr != end)
+ return false; /* trailing garbage */
+
+ /* finalize exponent */
+ if (exponent_sign)
+ exponent = -exponent;
+ exponent = exponent - point_ofs + mantissa_tzeros;
+
+ /* finalize mantissa */
+ if (mantissa_sign)
+ mantissa = -mantissa;
+
+ /* convert to one 64-bit fixed-point value */
+ exponent += decimals;
+ if (exponent < 0)
+ return false; /* cannot represent values smaller than 10^-decimals */
+ if (exponent >= 18)
+ return false; /* cannot represent values larger than or equal to 10^(18-decimals) */
+
+ for (int i=0; i < exponent; ++i) {
+ if (mantissa > (UPPER_BOUND / 10LL) || mantissa < -(UPPER_BOUND / 10LL))
+ return false; /* overflow */
+ mantissa *= 10;
+ }
+ if (mantissa > UPPER_BOUND || mantissa < -UPPER_BOUND)
+ return false; /* overflow */
+
+ if (amount_out)
+ *amount_out = mantissa;
+
+ return true;
+}
+
projects / VerusCoin.git / blobdiff