I am embedding Lua into a C/C++ application. Is there any way to call a Lua function from C/C++ without executing the entire script first? I've tried doing this: //call lua script from C/C++ program luaL_loadfile(L,"hello.lua"); //call lua function from C/C++ program lua_getglobal(L,"bar"); lua_call(L,0,0); But it gives me this: ...
I'm writing a 2D game using OpenGL. When I want to blit part of a texture as a sprite I use glTexCoord2f(u, v) to specify the UV co-ordinates, with u and v calculated like this: GLfloat u = (GLfloat)xpos_in_texture/(GLfloat)width_of_texture; GLfloat v = (GLfloat)ypos_in_texture/(GLfloat)height_of_texture; This works perfectly most of ...
I want to convert WinMain's cmdLine argument to argc and argv so I can use the argument parsing function I wrote for console applications. This would be trivial except that I want to support "quotes" too. For example: test.exe test1 test2 "testing testing" should be argv[0] = "test.exe"; argv[1] = "test1"; argv[2] = "test2"; argv[3] ...
Where I work we build and distribute a library and a couple complex programs built on that library. All code is written in C and is available on most 'standard' systems like Windows, Linux, Aix, Solaris, Darwin. I started in the QA department and while running tests recently I have been reminded several times that I need to remember ...
I'm using the old good Mixer API right now, but it does not work as expected on Windows Vista & 7 in the normal, not in XP compatibility mode. It mutes the sound for the current app only, but I need a global (hardware) mute. How to rearch the goal? Is there any way to code this w/o COM interfaces and strange calls, in pure C/C++? ...
I want to have a static array with arrays in it. I know you can make a normal array like this: int test[] = {1,2,3,4}; But I want to do something like this (Xcode gives me a bunch of warnings and stuff): int test[] = {{1,2}, {3,4}}; In python it would be: arr = [[1,2], [3,4]]; What's the proper way to do this? ...
Is there any way to get the source code by using object file in C . For example I have a source code simple.c cc simple.c Now I have a.out ( object file ) By this a.out whether can I get the source code of simple.c Thanks. ...
What is segmentation fault? Is it different in C and C++? How are segmentation fault and dangling pointer related? ...
I get this error (title of this question), when I am attempting to debug C/C++ programs using gdb with Netbeans IDE. Does anyone know what this means, and how to get rid of the warning? I am able to debug despite the warning, but I'd still like to make the warning go away. Relevant details: OS: Ubuntu 9.10 gdb: 7.0-ubuntu Netbeans: ...
I don't want to write my own boot loader -- happy to use Grub. I just want to implement pre-emptive multi threading, a basic file system, and virtual memory. I want something that can run on top of qemu. What's a good resource (book / tutorial) for accomplishing this goal? Thanks! ...
I m looking for a faster implementation or good a approximation of functions provided by cmath. I need to speed up the following functions pow(x,y) exp(z*pow(x,y)) where z<0. x is from (-1.0,1.0) and y is from (0.0, 5.0) ...
I have a dependancy library (libfcgi) that I compiled with g++ (GCC v4.4 MinGW) using the following calls: g++ -Iinclude -c -O2 *.c ar rcs ../libfcgi.a *.o Now, my main project is built like so: g++ -Idependancies\libfcgi\include -Ldependancies -O2 -lfcgi *.cpp g++ apparently finds libfcgi.a, but yet it fails to link to the...
It does not work. #include<stdio.h> void bubble_sort(int m, int a[100000]); void main() { int a[100000], i, m; FILE * be; be=fopen("be.txt","r"); // IMPORTANT! i pressed enter after last number in be.txt!!! for (i=0; !(feof(be)); ++i) fscanf(be,"%i", a+i); m=i-1; bubble_sort(m ,a); fclose(be); } void bubble_sort(int m, in...
Hi, I'm working on a client-server application written in C, I want to broadcast a message to all the machines available in the network. How can I do that using the usual socket system calls in C ? Thank you! ...
hi all, my problem is in convert a char to string i have to pass to strcat() a char to append to a string, how can i do? thanks! #include <stdio.h> #include <string.h> char *asd(char* in, char *out){ while(*in){ strcat(out, *in); // <-- err arg 2 makes pointer from integer without a cast *in++; } return out;...
If you have an array in C, how can you find out how much of it is filled? ...
Is there a "proper" way of clearing a screen in C for a console application? (Besides using:system("cls")) ...
I am trying to organise my UART library and prettify it a little bit by adding some #define s so I can customize it later without having to dig deeply into the code, but I can't seem to get the following bit of code working: #define FOSC 8000000 #define BAUDRATE 9600 #define BRGVAL (FOSC/2)/(16*BAUDRATE)-1 void uart_init...
Hi all I try to define a 64 bits width integer using C language on Ubnutu 9.10. 9223372036854775808 is 2^23 long long max=9223372036854775808 long max=9223372036854775808 When I compile it, the compiler gave the warning message: binary.c:79:19: warning: integer constant is so large that it is unsigned binary.c: In function ‘bitRever...
Hi, I'm using the FNV hash as a hashing algorithm on my Hash Table implementation but I'm getting the warning in the question title on this line: unsigned hash = 2166136261; I don't understand why this is happening because when I do this: printf("%u\n", UINT_MAX); printf("2166136261\n"); I get this: 4294967295 2166136261 Which ...