2014年2月

mac上nasm汇编helloworld

作者: 小子
时间: February 26, 2014
分类: Assembly
17 条评论

osx 10.9上自带的nasm版本比较低，然后不能编译64位的程序。

从www.nasm.us直接下载最新的版本；路径加入系统的PATH环境变量里面就好了。

mac上面的gcc编译.o文件的时候默认的入口是_main，而使用ld命令时，默认的是start。

SECTION .data

msg: db "hello xiaozi!", 0x0a
len: equ $-msg

SECTION .text
global _main

kernel:
    syscall
    ret

_main:
    mov rax,0x2000004
    mov rdi,1
    mov rsi,msg
    mov rdx,len
    call kernel

    mov rax,0x2000001
    mov rdi,0
    call kernel

nasm -f macho64 -o asm1.o asm1.asm
ld -o asm1 -e _main asm1.o
./asm1

[SysStatus app] 模拟monitorplus状态栏

作者: 小子
时间: February 24, 2014
分类: Object-C
评论

首先看效果：

2014-02-24 14_03_06.gif

下面是所用到的颜色:

分析：

代码

因为是demo，所以很多地方的代码组织不完善。

//
//  StatusItemView.h
//  SysStatus
//
//  Created by xiaozi on 14-2-23.
//  Copyright (c) 2014年 xiaozi. All rights reserved.
//

#import <Cocoa/Cocoa.h>
#import "ProgressView.h"

@interface StatusItemView : NSControl <NSMenuDelegate> {
    NSStatusItem *_statusItem;
    BOOL _isHighlighted;
    NSDictionary *_data;
    SEL _action;
    id __unsafe_unretained _target;
    ProgressView *_cpuView;
    ProgressView *_memView;
}

@property (nonatomic, readonly) NSStatusItem *statusItem;
@property (nonatomic, setter = setHighlighted:) BOOL isHighlighted;
@property (nonatomic) NSDictionary *data;
@property (nonatomic) SEL action;
@property (nonatomic, unsafe_unretained) id target;

- (id) initWithStatusItem: (NSStatusItem *)statusItem;

@end

//
//  StatusItemView.m
//  SysStatus
//
//  Created by xiaozi on 14-2-23.
//  Copyright (c) 2014年 xiaozi. All rights reserved.
//

#import "StatusItemView.h"
#import "ProgressView.h"

@implementation StatusItemView

- (id) initWithStatusItem: (NSStatusItem *)statusItem
{
    self = [super init];
    if (self) {
        // Initialization code here.
        _statusItem = statusItem;
        _cpuView = [[ProgressView alloc] initWithFrame: NSMakeRect(0, 10, 82, 11)];
        [_cpuView setBarColor:[NSColor colorWithCalibratedRed:0.91 green:0.3 blue:0.24 alpha:1]];
        [_cpuView setData:[NSDictionary dictionaryWithObjectsAndKeys:@"CPU %3d%%", @"label", [NSNumber numberWithInt: 0], @"value", nil]];
        _memView = [[ProgressView alloc] initWithFrame: NSMakeRect(0, 1, 82, 11)];
        [_memView setBarColor:[NSColor colorWithCalibratedRed:0.29 green:0.64 blue:0.87 alpha:1]];
        [_memView setData:[NSDictionary dictionaryWithObjectsAndKeys:@"MEM %3d%%", @"label", [NSNumber numberWithInt: 0], @"value", nil]];
        [self addSubview:_cpuView];
        [self addSubview:_memView];
    }
    return self;
}

- (void) setData: (NSDictionary *)data
{
    [_cpuView setData:[NSDictionary dictionaryWithObjectsAndKeys:@"CPU %3d%%", @"label", [data objectForKey: @"cpu"], @"value", nil]];
    [_memView setData:[NSDictionary dictionaryWithObjectsAndKeys:@"MEM %3d%%", @"label", [data objectForKey: @"mem"], @"value", nil]];
}

- (void) setHighlighted: (BOOL) highlighted
{
    if (_isHighlighted == highlighted) return;
    _isHighlighted = highlighted;
    [_cpuView setHighlighted: highlighted];
    [_memView setHighlighted: highlighted];
    [self setNeedsDisplay: YES];
}

- (void) setMenu:(NSMenu *)menu
{
    [menu setDelegate: self];
    [super setMenu: menu];
}

- (void)mouseDown:(NSEvent *)theEvent
{
    [_statusItem popUpStatusItemMenu: [super menu]];
    [NSApp sendAction:_action to:_target from:self];
}

- (void)menuWillOpen:(NSMenu *)menu {
    [self setHighlighted:YES];
    [self setNeedsDisplay:YES];
}

- (void)menuDidClose:(NSMenu *)menu {
    [self setHighlighted:NO];
    [self setNeedsDisplay:YES];
}

- (void)drawRect:(NSRect)dirtyRect
{
    [_statusItem drawStatusBarBackgroundInRect:dirtyRect withHighlight: _isHighlighted];

}

@end

//
//  ProgressView.m
//  SysStatus
//
//  Created by xiaozi on 14-2-24.
//  Copyright (c) 2014年 xiaozi. All rights reserved.
//

#import "ProgressView.h"

@implementation ProgressView

- (id)initWithFrame:(NSRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code here.
        _data = [NSDictionary dictionaryWithObjectsAndKeys:@"LAB %3d%%", @"label", [NSNumber numberWithInt: 50], @"value", nil];
        _barColor = [NSColor colorWithCalibratedRed:0.91 green:0.3 blue:0.24 alpha:1];
    }
    return self;
}

- (void) setHighlighted:(BOOL)highlighted
{
    if (_highlighted == highlighted) return;
    _highlighted = highlighted;
    [self setNeedsDisplay: YES];
}

-(void) setData:(NSDictionary *)data
{
    _data = data;
    [self setNeedsDisplay: YES];
}

- (void)drawRect:(NSRect)dirtyRect
{
    NSColor *fontColor,*barBorderColor,*barIndicatorColor,*barBgColor;
    if (_highlighted) {
        fontColor = [NSColor whiteColor];
        barBorderColor = [NSColor whiteColor];
        barIndicatorColor = [NSColor whiteColor];
        barBgColor = [NSColor clearColor];
    } else {
        fontColor = [NSColor blackColor];
        barBorderColor = [NSColor colorWithCalibratedRed:0.17 green:0.24 blue:0.3 alpha:1];
        barIndicatorColor = _barColor;
        barBgColor = [NSColor colorWithCalibratedRed:0.95 green:0.96 blue:0.96 alpha:1];
    }
    NSDictionary *attributes = [NSDictionary dictionaryWithObjectsAndKeys:[NSFont fontWithName:@"Menlo" size: 8], NSFontAttributeName, fontColor, NSForegroundColorAttributeName, nil];
    NSAttributedString * text=[[NSAttributedString alloc] initWithString:[NSString stringWithFormat: [_data valueForKey:@"label"], [[_data objectForKey: @"value"] integerValue]] attributes: attributes];
    [text drawAtPoint:NSMakePoint(6, 1)];
    
    NSRect bar = NSMakeRect(50.0f, 3, 27.0f, 6.0f);
    bar = NSInsetRect(bar, .5f, .5f);
    NSBezierPath *barView = [NSBezierPath bezierPathWithRect: bar];
    [barBgColor set];
    [barView fill];
    [barBorderColor set];
    [barView stroke];
    NSRect barIndicator = NSMakeRect(50.0f, 3, roundf(.27f * [[_data objectForKey: @"value"] integerValue]), 6.0f);
    barIndicator = NSInsetRect(barIndicator, 1, 1);
    [barIndicatorColor set];
    [NSBezierPath fillRect:barIndicator];
}

@end

使用方法

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
    // Insert code here to initialize your application
    NSStatusItem *statusItem = [[NSStatusBar systemStatusBar] statusItemWithLength:82];
    statusItemView = [[StatusItemView alloc] initWithStatusItem: statusItem];
    [statusItem setHighlightMode: YES];
    [statusItem setView: statusItemView];
    [statusItemView setMenu: _statusMenu];
    
    [NSTimer scheduledTimerWithTimeInterval:2
                                      target:self
                                    selector:@selector(updateInfo:)
                                    userInfo:nil
                                     repeats:YES];
}

- (void)updateInfo:(NSTimer *)timer
{
    int cpuUsage = (arc4random() % 20) + 2;
    int memUsage = (arc4random() % 10) + 50;
//    NSLog(@"%d, %d", cpuUsage, memUsage);
    NSDictionary *data = [NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithInt: cpuUsage], @"cpu", [NSNumber numberWithInt: memUsage], @"mem", nil];
    [statusItemView setData: data];
}

[awake app] 自定义StatusItemView

作者: 小子
时间: February 23, 2014
分类: Object-C
评论

2014-02-23 16_43_29.gif

源码已经放在github上

左击切换状态，右击显示菜单；但是NSStatusItem没有提供右键菜单，所以要定义自己的View；若果需要直接方便使用的话，有开源框架RHStatusItemView，引入项目中就可以用了。下面是我自己实现的：

//
//  StatusItemView.h
//  awake
//
//  Created by xiaozi on 14-2-21.
//  Copyright (c) 2014年 xiaozi. All rights reserved.
//

#import <Cocoa/Cocoa.h>

@interface StatusItemView : NSControl <NSMenuDelegate>{
    NSImage *_image;
    NSImage *_alternateImage;
    NSStatusItem *_statusItem;
    BOOL _isHighlighted;
    SEL _action;
    SEL _rightAction;
    id __unsafe_unretained _target;
}

@property (nonatomic, readonly) NSStatusItem *statusItem;
@property (nonatomic, strong) NSImage *image;
@property (nonatomic, strong) NSImage *alternateImage;
@property (nonatomic, setter = setHighlighted:) BOOL isHighlighted;
@property (nonatomic) SEL action;
@property (nonatomic) SEL rightAction;
@property (nonatomic, unsafe_unretained) id target;

- (id) initWithStatusItem: (NSStatusItem *) statusItem;

@end

//
//  StatusItemView.m
//  awake
//
//  Created by xiaozi on 14-2-21.
//  Copyright (c) 2014年 xiaozi. All rights reserved.
//

#import "StatusItemView.h"

@implementation StatusItemView

- (id)initWithFrame:(NSRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code here.
    }
    return self;
}

- (void) drawRect:(NSRect)dirtyRect
{
    [_statusItem drawStatusBarBackgroundInRect:dirtyRect withHighlight:_isHighlighted];
    NSImage *icon = _isHighlighted ? _alternateImage : _image;
    NSSize iconSize = [icon size];
    NSRect bounds = [self bounds];
    
    CGFloat iconX = roundf((NSWidth(bounds) - iconSize.width) / 2);
    CGFloat iconY = roundf((NSHeight(bounds) - iconSize.height) / 2);
    NSPoint iconPoint = NSMakePoint(iconX, iconY);
    [icon drawAtPoint:iconPoint fromRect:bounds operation:NSCompositeSourceOver fraction:1.0];
}

- (id) initWithStatusItem: (NSStatusItem *) statusItem {
    CGFloat itemWidth = [statusItem length];
    CGFloat itemHeight = [[NSStatusBar systemStatusBar] thickness];
    NSRect itemRect = NSMakeRect(0.0, 0.0, itemWidth, itemHeight);
    self = [self initWithFrame:itemRect];
    if (self != nil)
    {
        _statusItem = statusItem;
        [_statusItem setView: self];
    }
    return self;
}

- (void)setMenu:(NSMenu *) menu {
    [menu setDelegate: self];
    [super setMenu: menu];
}

- (void)setHighlighted:(BOOL)newFlag
{
    if (_isHighlighted == newFlag) return;
    _isHighlighted = newFlag;
    [self setNeedsDisplay:YES];
}

- (void)mouseDown:(NSEvent *)theEvent
{
    [NSApp sendAction:_action to:_target from:self];
}

- (void)rightMouseDown:(NSEvent *)theEvent
{
    NSMenu *menu = [super menu];
    [_statusItem popUpStatusItemMenu:menu];
    [NSApp sendAction:_rightAction to:_target from:self];
}

- (void)menuWillOpen:(NSMenu *)menu {
    [self setHighlighted:YES];
    [self setNeedsDisplay:YES];
}

- (void)menuDidClose:(NSMenu *)menu {
    [self setHighlighted:NO];
    [self setNeedsDisplay:YES];
}

- (void)setImage:(NSImage *)newImage
{
    _image = newImage;
    [self setNeedsDisplay: YES];
}

- (void)setAlternateImage:(NSImage *)newImage
{
    _alternateImage = newImage;
    if (_isHighlighted)
        [self setNeedsDisplay:YES];
}

- (BOOL)isOpaque
{
    return YES;
}

@end

具体使用方法：

statusItem = [[NSStatusBar systemStatusBar] statusItemWithLength: 22.0];
[statusItem setHighlightMode:YES];
statusView = [[StatusItemView alloc] initWithStatusItem: statusItem];
[statusView setMenu: statusMenu];
// [statusItem setView: statusView];
[statusView setImage: [NSImage imageNamed:@"MenuIcon"]];
[statusView setAlternateImage: [NSImage imageNamed:@"MenuIconSelected"]];

[statusView setAction: @selector(clickStatusItem:)];

安装mailcatcher

作者: 小子
时间: February 19, 2014
分类: Linux
评论

安装rvm & ruby

\curl -sSL https://get.rvm.io | bash -s stable
rvm install 1.9
rvm use 1.9 --default

更改gem源

gem sources
gem sources -r https://rubygems.org/
gem sources -a http://ruby.taobao.org/

安装mailcatcher

gem install mailcatcher
mailcatcher --http-ip=0.0.0.0
# browser visit http://[ip]:1080/

配置php

# vim /usr/local/php/etc/php.ini
send_mail_path = /usr/bin/env catchmail
# service php-fpm restart

测试

# php -a
mail('245565986@qq.com', 'test email', 'email\'s content is written by xiaozi.');

vim 杂记

作者: 小子
时间: February 16, 2014
分类: Linux
评论

粘贴到vim中

直接insert模式下粘贴会有问题，如：自动的缩进，自动的注释。

可以使用

:r !cat
// 粘贴
// [ctrl] + [d]

在 mac 下，方便一点，可以使用

:r !pbpaste

Turning off auto indent when pasting text into vim

多次块缩进

使用shift + v之后选择了多行，并且进行缩进>，但是可能需要缩进多次；需要用到重复上次命令的指令.。

shift + v
shift + .
// 重复多少次就按多少次
.

How do I indent multiple lines quickly in vi?

C实现进度条

作者: 小子
时间: February 15, 2014
分类: C/C++
评论

#include <stdio.h>

int main() {
    int pwidth = 75;
    int i, j;
    for (i = 0; i < pwidth; i++) {
        // 构建进度条
        printf("%3d%% [", i * 100 / pwidth);
        for (j = 0; j <= i; j++)
            putchar('=');
        for (; j < pwidth; j++)
            putchar(' ');
        putchar(']');
        fflush(stdout);
        sleep(1);
        // 把刚才输出的都擦掉，用\r会有问题。
        for (j = 0; j < pwidth + 7; j++)
            putchar('\b');
    }
    putchar('\n');
    return 0;
}

02-19,补充：

Terminal Control Escape Sequences 找到

Erase End of Line <ESC>[K
Erases from the current cursor position to the end of the current line.
Erase Start of Line <ESC>[1K
Erases from the current cursor position to the start of the current line.
Erase Line <ESC>[2K
Erases the entire current line.
Erase Down <ESC>[J
Erases the screen from the current line down to the bottom of the screen.
Erase Up <ESC>[1J
Erases the screen from the current line up to the top of the screen.
Erase Screen <ESC>[2J
Erases the screen with the background colour and moves the cursor to _home_.

若是tty的话，可以这样：

printf("\r\x1b[K%3d%% [", i * 100 / pwidth);

使用homebrew安装axel

作者: 小子
时间: February 11, 2014
分类: Other
评论

brew install axel

安装说是证书错误，然后就用Safari打开链接，信任了一下网址的证书，再次执行brew install，报SHA1不一样，继续用浏览器打开，结果发现页面不对，官网的下载地址失效了？无奈中是用google找到了axel的一个下载地址，macports的；

cd /Library/Caches/Homebrew
# http://distfiles.macports.org/axel/axel-2.4.tar.bz2
# 文件下载到该目录
brew install -vd axel

至此，安装成功！

02-19,注：

貌似使用pstree查看axel -n10的时候并没有使用多线程；于是就删除了他，换成了aria2

2014年2月

mac上nasm汇编helloworld

[SysStatus app] 模拟monitorplus状态栏

代码

[awake app] 自定义StatusItemView

安装mailcatcher

安装rvm & ruby

更改gem源

安装mailcatcher

配置php

测试

vim 杂记

粘贴到vim中

多次块缩进

C实现进度条

使用homebrew安装axel

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