u64.cpp

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#include "linden_common.h"

#include "u64.h"


U64 str_to_U64(const char *str)
{
        U64 result = 0;
        const char *aptr = strpbrk(str,"0123456789");

        if (!aptr)
        {
                llwarns << "str_to_U64: Bad string to U64 conversion attempt: format\n" << llendl;
        }
        else
        {
                while ((*aptr >= '0') && (*aptr <= '9'))
                {
                        result = result*10 + (*aptr++ - '0');
                }
        }
        return (result);
}


char* U64_to_str(U64 value, char* result, S32 result_size) 
{                                                                               
        U32 part1,part2,part3;
        
        part3 = (U32)(value % (U64)10000000);
        
        value /= 10000000;
        part2 = (U32)(value % (U64)10000000);
        
        value /= 10000000;
        part1 = (U32)(value % (U64)10000000);
        
        // three cases to avoid leading zeroes unless necessary
        
        if (part1)
        {
                snprintf(       /* Flawfinder: ignore */
                        result,
                        result_size,
                        "%u%07u%07u",
                        part1,part2,part3);
        }
        else if (part2)
        {
                snprintf(       /* Flawfinder: ignore */
                        result,
                        result_size,
                        "%u%07u",
                        part2,part3);
        }
        else
        {
                snprintf(       /* Flawfinder: ignore */
                        result,
                        result_size,
                        "%u",
                        part3);         
        }
        return (result);
} 

F64 U64_to_F64(const U64 value)
{
        S64 top_bits = (S64)(value >> 1);
        F64 result = (F64)top_bits;
        result *= 2.f;
        result += (U32)(value & 0x01);
        return result;
}

U64     llstrtou64(const char* str, char** end, S32 base)
{
#ifdef LL_WINDOWS
        return _strtoui64(str,end,base);
#else
        return strtoull(str,end,base);
#endif
}

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