libc

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Implementation of a printf() function

I\'m working ona toy programming language. I use LLVM to generate machine code. Now my question is: How do you implement a printf() function from scratch?. In a C progra开发者_运维问答m you call into[详细]

2023-04-11 14:02 分类：问答
How to build apple's opensource libc?

I\'m trying to build apple\'s opensource libc (from http://www.opensource.apple.com/source/Libc/Libc-763.11/) on my OS X 10.6.8 laptop. This is in an attempt to essentially get a locally generated rep[详细]

2023-04-09 09:02 分类：问答
How did malloc and calloc end up with different signatures? [duplicate]

This question already has answers here: Closed 11 years ago. Possible Duplicate: Why calloc takes two arguments while malloc only one?[详细]

2023-04-08 18:44 分类：问答
Android weird lib.c crash

I\'m writing an Android app. I totally have no idea why it happenes often. Could someone tell me what reason might cause it happened?[详细]

2023-04-08 09:00 分类：问答
char* str="..." vs char str[]="..." strange behaviour [duplicate]

This question already has answers here: Closed 11 years ago. Possible Duplicate: Program crashes when trying to set a character of a char array[详细]

2023-04-01 15:21 分类：问答
How should posix_spawn() behave when given a file with an unrecognized executable magic number?

The glibc implementation of posix_spawn tries sending the file to /bin/sh if execve() fails with ENOEXEC:[详细]

2023-03-30 01:05 分类：问答
Memcpy segfaulting with valid pointers

I\'m using libcurl in my program, and running into a segfault. Before I filed a bug with the curl project, I thought I\'d do a little debugging.What I found seemed very odd to me, and I haven\'t been[详细]

2023-03-23 19:33 分类：问答
Where is stdarg.h?

On my system (Mac OS 10.6) /usr/include/stdarg.h is: /* This file is public domain.*/ /* G开发者_StackOverflowCC uses its own copy of this header */[详细]

2023-03-20 20:40 分类：问答
How does libc provide functions with two names?

Before the advent of direct binding(-Bdirect)libcprovidedmany functionswithtwonames.For example, getpwent() and _getpwent().[详细]

2023-03-20 08:16 分类：问答
Is printf("%d", 1.0) undefined?

According to section 4.9.6.1 of the C89 draft, %d is a character that 开发者_如何转开发specifies the type of conversion to be applied.[详细]

2023-03-18 15:52 分类：问答