//
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// NSNumber+YYAdd.m
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// YYCategories <https://github.com/ibireme/YYCategories>
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//
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// Created by ibireme on 13/8/24.
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// Copyright (c) 2015 ibireme.
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//
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// This source code is licensed under the MIT-style license found in the
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// LICENSE file in the root directory of this source tree.
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//
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#import "NSNumber+YYAdd.h"
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#import "NSString+YYAdd.h"
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#import "YYCategoriesMacro.h"
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YYSYNTH_DUMMY_CLASS(NSNumber_YYAdd)
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@implementation NSNumber (YYAdd)
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+ (NSNumber *)numberWithString:(NSString *)string {
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NSString *str = [[string stringByTrim] lowercaseString];
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if (!str || !str.length) {
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return nil;
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}
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static NSDictionary *dic;
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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dic = @{@"true" : @(YES),
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@"yes" : @(YES),
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@"false" : @(NO),
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@"no" : @(NO),
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@"nil" : [NSNull null],
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@"null" : [NSNull null],
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@"<null>" : [NSNull null]};
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});
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NSNumber *num = dic[str];
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if (num) {
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if (num == (id)[NSNull null]) return nil;
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return num;
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}
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// hex number
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int sign = 0;
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if ([str hasPrefix:@"0x"]) sign = 1;
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else if ([str hasPrefix:@"-0x"]) sign = -1;
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if (sign != 0) {
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NSScanner *scan = [NSScanner scannerWithString:str];
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unsigned num = -1;
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BOOL suc = [scan scanHexInt:&num];
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if (suc)
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return [NSNumber numberWithLong:((long)num * sign)];
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else
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return nil;
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}
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// normal number
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NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
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[formatter setNumberStyle:NSNumberFormatterDecimalStyle];
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return [formatter numberFromString:string];
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}
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@end
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