c
Question: Wrote my wrapper over realloc . Is everything right here? Maybe there are some flaws that I did not notice? #define qk_realloc(p, n) qk_realloc__(p, &p, n) /* ================================= [TEST] The qk_realloc__ function Функция изменяет размер блока памяти, на который указывает old. Если операция выполнена успешно, то old присваивается адрес …
Question: Question: About word2vec, which made the field of natural language processing exciting. There is a program called word2vec that converts words into vector data. word2vec code This program can convert a word into a vector of any dimension. It is known that the word vector generated by this program …
About the vectorization algorithm of C language word2vec Read More »
Question: Question: I would like to use a fixed image in a program written in C language, but since it is multi-platform, I think it is the quickest to embed it in the binary of the program. You don't have to put it in the source, but you want to …
Question: I'm trying to run a program for blinking LEDs on STM32L476RG. The program is successfully flashed and launched. Initialization is in progress, but when the program jumps to main() I get a hard fault: signal handler called () at 0xfffffff9 I use openocd for firmware. I use the libopencm3 …
Why does the controller (stm32l476rg) fall into hard fault? Read More »
Question: There is a cross compiler for the Sparc architecture. But it does not support Built-in functions for atomic memory access. I'm interested in the function __sync_val_compare_and_swap (long *ptr, long oldval long newval) it performs an atomic compare and exchange operation: That is, if the current value of *ptr is …
Implementation of __sync_val_compare_and_swap function for Sparc V8 Read More »
Question: There is a problem. There is a binary tree. It is required to determine whether this tree is a binary search tree. It is desirable to present the solution in C++ or C. The time and space complexity of the algorithm, as well as the universality of the approach, …
Question: I read the article and decided to apply the packaging, but it turned out to be not as simple as described. There is such a structure struct info { VipsImage *in, *out; unsigned buff_len:24; unsigned name_len:8; unsigned height:10; unsigned w:10; unsigned h:10; unsigned isWebp:1; unsigned isBig:1; }; It weighs …
Question: there is a function int foo(int num) { if(num) return 1; else return 3; } I understand the output without optimizations: foo(int): pushq %rbp movq %rsp, %rbp movl %edi, -4(%rbp) cmpl $0, -4(%rbp) je .L2 movl $1, %eax jmp .L3 .L2: movl $3, %eax .L3: popq %rbp ret but …
Question: According to the standard, the printf function has a prototype: int printf(const char *restrict format, …); Actually, subject: #include <stdio.h> int main (void) { const char *format = “hello world!”; printf(format); return 0; } Protest Clang : printf.c:7:12: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security] …
Why does format string is not a string literal error occur? Read More »
Question: Question: I am currently analyzing past software, but is there an application that lists function calls? I made a call graph with doxygen, but it's too complicated to document. I want to output with csv etc. (I hope it can be listed not only for csv) fooa-> fob-> foc1 …
