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// **********************************************************************
//
// Copyright (c) 2003-2008 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
#include <IceUtil/InputUtil.h>
#include <stdlib.h>
#include <errno.h>
#if defined(_MSC_VER) && (_MSC_VER < 1300)
#include <limits.h>
#endif
#if defined(__hpux)
#include <inttypes.h>
#endif
using namespace std;
using namespace IceUtil;
namespace IceUtilInternal
{
#if defined(__BCPLUSPLUS__) || (defined(_MSC_VER) && (_MSC_VER < 1300))
//
// The VC60 runtime does not include _strtoi64, so we provide our own implementation
//
static const string allDigits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
//
// Table to convert ASCII digits/letters into their value (100 for unused slots)
//
static const char digitVal[] =
{
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, // '0' - '9'
100, 100, 100, 100, 100, 100, 100, // punctuation
10, 11, 12, 13, 14, 15, 16, 17, 18, 19, // 'A' - 'J'
20, 21, 22, 23, 24, 25, 26, 27, 28, 29, // 'K' - 'T'
30, 31, 32, 33, 34, 35 // 'U' - 'Z'
};
static IceUtil::Int64
strToInt64Impl(const char* s, char** endptr, int base)
{
//
// Assume nothing will be there to convert for now
//
if(endptr)
{
*endptr = const_cast<char *>(s);
}
//
// Skip leading whitespace
//
while(*s && isspace(static_cast<unsigned char>(*s)))
{
++s;
}
//
// Check for sign
//
int sign = 1;
if(*s == '+')
{
++s;
}
else if(*s == '-')
{
sign = -1;
++s;
}
//
// Check that base is valid
//
if(base == 0)
{
if(*s == '0')
{
base = 8;
++s;
//
// We have at least this zero
//
if(endptr)
{
*endptr = const_cast<char *>(s);
}
if(*s == 'x' || *s == 'X')
{
base = 16;
++s;
}
}
else
{
base = 10;
}
}
else if(base < 2 || base > 36)
{
errno = EINVAL;
return 0;
}
//
// Check that we have something left to parse
//
if(*s == '\0')
{
//
// We did not read any new digit so we don't update endptr
//
return 0;
}
Int64 result = 0;
bool overflow = false;
bool digitFound = false;
const string validDigits(allDigits.begin(), allDigits.begin() + base);
while(*s && validDigits.find_first_of(toupper(static_cast<unsigned char>(*s))) != validDigits.npos)
{
digitFound = true;
if(!overflow)
{
int digit = digitVal[toupper(static_cast<unsigned char>(*s)) - '0'];
assert(digit != 100);
if(result < _I64_MAX / base)
{
result *= base;
result += digit;
}
else if((digit <= _I64_MAX % base) || (sign == -1 && digit == _I64_MAX % base + 1))
{
result *= base;
result += digit;
}
else
{
overflow = true;
result = sign == -1 ? _I64_MIN : _I64_MAX;
}
}
++s;
}
if(overflow)
{
errno = ERANGE;
}
else
{
result *= sign;
}
if(digitFound && endptr != 0)
{
*endptr = const_cast<char *>(s);
}
return result;
}
#endif
Int64
strToInt64(const char* s, char** endptr, int base)
{
#if defined(_WIN32)
# if defined(__BCPLUSPLUS__) || (defined(_MSC_VER) && (_MSC_VER < 1300))
return strToInt64Impl(s, endptr, base);
# else
return _strtoi64(s, endptr, base);
# endif
#elif defined(ICE_64)
return strtol(s, endptr, base);
#elif defined(__hpux)
return __strtoll(s, endptr, base);
#else
return strtoll(s, endptr, base);
#endif
}
bool
stringToInt64(const string& s, Int64& result)
{
const char* start = s.c_str();
char* end = 0;
errno = 0;
result = strToInt64(start, &end, 0);
return (errno == 0 && start != end);
}
}
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