如何使用read（）系统调用来读取32位整数 [英] How to use read() system call to read an 32bit integer
问题描述
你好，所有
也许这个问题不适合发布在这里:(但无论如何会
有人帮助我吗？
我正在做我的操作系统作业。我知道如何使用缓冲区
字符串来做读写。
但是如何大约32位int？
这是我的方法：
typedef unsigned char * byte_pointer;
write（fd，（byte_pointer）& i，sizeof（int））;
read（fd，（byte_pointer）& j，sizeof（int））;
它有效。
我不知道我的方法是否是一种常见的方法。或者还有一些其他的
方式要做到这一点。
提前感谢。
文章< 11 **** ******************@r34g2000hsd.googlegroups .com> ;,
Yin Zhu< zh ******** @ gmail。 comwrote：
>你好，所有
也许这个问题不适合发布她e :(但无论如何会有人帮助我吗？
我正在做我的操作系统功课。我知道如何使用缓冲区
字符串来进行读写。
但32位int怎么样？
这是我的方法：
typedef unsigned char * byte_pointer;
write（fd，（byte_pointer）& i，sizeof（int））;
read（fd，（byte_pointer）& j，sizeof （INT））;
非主题。不便携。不能在这里讨论它。 Blah，等等，等等。
-
有用的clc相关链接：
http://en.wikipedia.org/wiki/Aspergers
http://en.wikipedia.org/wiki/Clique
http://en.wikipedia.org/wiki/C_programming_language
Yin Zhu写道：
你好，所有
也许这个问题不是适当发布在这里:(但无论如何会
有人帮助我吗？
我正在做我的操作系统作业。我知道如何使用缓冲区
字符串做读写。
但32位int怎么样？
这是我的方法执行：
typedef unsigned char * byte_pointer;
write（f d，（byte_pointer）& i，sizeof（int））;
读取（fd，（byte_pointer）& j，sizeof（int））;
它有效。
我不知道我的方法是否是一种常见方式。或者还有一些其他
的方法。
提前感谢。
在标准C中你会使用fread和fwrite而不是读写。
但是请不要忘记：
如果它有效，它就可以了。不要修复那些没有被打破的东西
9月11日晚上9:11，jacob navia< ja ... @ jacob.remcomp .frwrote：
Yin Zhu写道：
你好，所有
也许这个问题不适合发布在这里:(但无论如何会
有人帮我吗？
我正在做我的操作系统作业。我知道如何使用缓冲区
字符串来进行读写。
但32位int怎么样？
这是我的方法：
typedef unsigned char * byte_pointer;
write（fd，（byte_pointer）& i，sizeof（int））;
read（fd，（byte_pointer）& j，sizeof（int））;
它有效。
我不知道我的方法是否是常用方法。或者还有其他一些方法可以做到这一点。
提前感谢。
在标准C中你会使用fread和fwrite而不是读写。
但请不要忘记：
如果有效，它可以工作。不要修复那些没有破坏的东西
但我需要将fread与read进行比较。
fread有自己的缓冲机制，我想写一个缓冲读取
与fread进行比较。
Hello, All
Maybe this question is not proper to post here:( but anyway would
someone help me?
I am doing my operating system homework. I know how to use a buffer
string to do read and write.
But how about 32-bit int?
Here is my method to do:
typedef unsigned char *byte_pointer;
write(fd, (byte_pointer)&i, sizeof(int));
read(fd, (byte_pointer)&j, sizeof(int));
it works.
I don''t know whether my method is a common way. or there''s some other
ways to do it.
thanks in advance.
In article <11**********************@r34g2000hsd.googlegroups .com>,
Yin Zhu <zh********@gmail.comwrote:>Hello, All
Maybe this question is not proper to post here:( but anyway would
someone help me?
I am doing my operating system homework. I know how to use a buffer
string to do read and write.
But how about 32-bit int?
Here is my method to do:
typedef unsigned char *byte_pointer;
write(fd, (byte_pointer)&i, sizeof(int));
read(fd, (byte_pointer)&j, sizeof(int));Off topic. Not portable. Cant discuss it here. Blah, blah, blah.
--
Useful clc-related links:
http://en.wikipedia.org/wiki/Aspergers
http://en.wikipedia.org/wiki/Clique
http://en.wikipedia.org/wiki/C_programming_language
Yin Zhu wrote:Hello, All
Maybe this question is not proper to post here:( but anyway would
someone help me?
I am doing my operating system homework. I know how to use a buffer
string to do read and write.
But how about 32-bit int?
Here is my method to do:
typedef unsigned char *byte_pointer;
write(fd, (byte_pointer)&i, sizeof(int));
read(fd, (byte_pointer)&j, sizeof(int));
it works.
I don''t know whether my method is a common way. or there''s some other
ways to do it.
thanks in advance.
In standard C you would use fread and fwrite instead of read and write.
But please do not forget:
If it works, it works. Do not fix something that''s not broken
On Sep 11, 9:11 pm, jacob navia <ja...@jacob.remcomp.frwrote:Yin Zhu wrote:Hello, All
Maybe this question is not proper to post here:( but anyway would
someone help me?
I am doing my operating system homework. I know how to use a buffer
string to do read and write.
But how about 32-bit int?
Here is my method to do:
typedef unsigned char *byte_pointer;
write(fd, (byte_pointer)&i, sizeof(int));
read(fd, (byte_pointer)&j, sizeof(int));
it works.
I don''t know whether my method is a common way. or there''s some other
ways to do it.
thanks in advance.
In standard C you would use fread and fwrite instead of read and write.
But please do not forget:
If it works, it works. Do not fix something that''s not broken
but I need to compare fread with read.
fread has its own buffering mechanism, I want to write a buffered read
to compare with fread.
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