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How to allocate aligned memory only using the standard library?
...
Original answer
{
void *mem = malloc(1024+16);
void *ptr = ((char *)mem+16) & ~ 0x0F;
memset_16aligned(ptr, 0, 1024);
free(mem);
}
Fixed answer
{
void *mem = malloc(1024+15);
void *ptr = ((uintptr_t)mem+15) & ~ (uintptr_t)0x0F;
memset_16aligned(ptr, 0, 10...
How to get the current directory in a C program?
...
Have you had a look at getcwd()?
#include <unistd.h>
char *getcwd(char *buf, size_t size);
Simple example:
#include <unistd.h>
#include <stdio.h>
#include <limits.h>
int main() {
char cwd[PATH_MAX];
if (getcwd(cwd, sizeof(cwd)) != NULL) {
prin...
Pretty-Printing JSON with PHP
... 5.5.3 here, just seems to add a bit of spacing between the characters, not any actual indenting.
– user393219
Jan 30 '14 at 1:33
35
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What is the purpose of static keyword in array parameter of function like “char s[static 10]”?
...ot write someArray=someOtherArray. It is the same as if the parameter were char * const someArray.
This syntax is only usable within the innermost [] of an array declarator in a function parameter list; it would not make sense in other contexts.
The Standard text, which covers both of the above...
What is Type-safe?
.... Memory** and data type (with its corresponding operations).
Memory**
A char typically requires 1 byte per character, or 8 bits (depends on language, Java and C# store unicode chars which require 16 bits).
An int requires 4 bytes, or 32 bits (usually).
Visually:
char: |-|-|-|-|-|-|-|-|
int : |...
What is The Rule of Three?
...pointers.
The person class might have looked like this:
class person
{
char* name;
int age;
public:
// the constructor acquires a resource:
// in this case, dynamic memory obtained via new[]
person(const char* the_name, int the_age)
{
name = new char[strlen(the_name...
jQuery dot in ID selector? [duplicate]
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Use the escaping rules from the jQuery selectors API as follows:
$('#root\\.SomeCoolThing')
From the docs:
To use any of the meta-characters (such as
!"#$%&'()*+,./:;<=>?@[\]^`{|}~) as a literal part of a name, it must
be escaped with with...
获取文件系统映像及恢复删除的数据（FAT文件系统格式描述） - C/C++ - 清泛...
...str()<< L"/n";
}
int driveIndex;
std::cin >> driveIndex;//selecting a disk
std::vector<unsigned char> buffer;
//creating a path
std::wstring dumpPath(L"////.//PhysicalDrive");
wchar_t index[MAX_PATH];
_itow(devices.at(driveIndex).vHarddiskIndexes[0], index , MAX_P...
windows C++ gbk转为utf-8 - C/C++ - 清泛网 - 专注C/C++及内核技术
...码的中文字符串
//slen是utf8_string字符数组的大小
int multichar_2_utf8(const char *m_string,char *utf8_string,int slen) {
int len=0;
wchar_t *w_string;
//char *utf8_string;
//计算由ansi转换为unicode后，unicode编码的长度
len=MultiByteToWideChar(CP...
Hiding user input on terminal in Linux script
... ss64.com/bash/read.html Silent mode. If input is coming from a terminal, characters are not echoed.
– Andreas Wong
Oct 7 '15 at 3:45
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