#import "DDNumber.h"


@implementation NSNumber (DDNumber)

+ (BOOL)parseString:(NSString *)str intoSInt64:(SInt64 *)pNum
{
    if(str == nil)
    {
        *pNum = 0;
        return NO;
    }
    
    errno = 0;
    
    // On both 32-bit and 64-bit machines, long long = 64 bit
    
    *pNum = strtoll([str UTF8String], NULL, 10);
    
    if(errno != 0)
        return NO;
    else
        return YES;
}

+ (BOOL)parseString:(NSString *)str intoUInt64:(UInt64 *)pNum
{
    if(str == nil)
    {
        *pNum = 0;
        return NO;
    }
    
    errno = 0;
    
    // On both 32-bit and 64-bit machines, unsigned long long = 64 bit
    
    *pNum = strtoull([str UTF8String], NULL, 10);
    
    if(errno != 0)
        return NO;
    else
        return YES;
}

+ (BOOL)parseString:(NSString *)str intoNSInteger:(NSInteger *)pNum
{
    if(str == nil)
    {
        *pNum = 0;
        return NO;
    }
    
    errno = 0;
    
    // On LP64, NSInteger = long = 64 bit
    // Otherwise, NSInteger = int = long = 32 bit
    
    *pNum = strtol([str UTF8String], NULL, 10);
    
    if(errno != 0)
        return NO;
    else
        return YES;
}

+ (BOOL)parseString:(NSString *)str intoNSUInteger:(NSUInteger *)pNum
{
    if(str == nil)
    {
        *pNum = 0;
        return NO;
    }
    
    errno = 0;
    
    // On LP64, NSUInteger = unsigned long = 64 bit
    // Otherwise, NSUInteger = unsigned int = unsigned long = 32 bit
    
    *pNum = strtoul([str UTF8String], NULL, 10);
    
    if(errno != 0)
        return NO;
    else
        return YES;
}

@end