C/C++ Programming Help Thread

[_df_]

And ulink() ? Never used it before and i'm not gonna start now. Never heard of it ...

dont try and learn anything, it might hurt your pea sized brain. lol you say that like you've been programming for decades when its been what? a day judging by your poor code posted. unlink is posix, its always nice to cleanup after yourself removing unneeded output files :) fscanf, bleagh, welcome to buffer overruns and stack smashing.

[eldiablov]

dont try and learn anything, it might hurt your pea sized brain.

No need to be a ****ing ass about it. So what if i'm learning? Who gives a ****? I'm sorry I dont know everything like you. I merely meant that I havent got to the stage where I need to use that stuff yet. (it's on like page 200 in C programming) which i'm reading btw.

[_df_]

Well the whole 'never used it not gonna start now' is not indicative of 'learning' its more indicative of acting like an ass. you asked a question to which I responded and you come back with a talk to the hand I dont want to know about it.... If you wanted help like you did originally, dont act like a brick wall.

[yaustar]

text = fopen("crash.log", "w");

Why are you open a file to write when yo are actually you are reading from it?

[eldiablov]

observe my double post, I noticed my mistake and corrected it before anyone replied ...

Thanks anyway

[slicer4ever]

hey how do i get it so that my function can have multiple variables, like for example printf("string %i%i%i", 1, 2, 3); <--their won't always be the extra variables in their...so how can i do that with my own functions?

[Archaemic]

You don't really want to. It's possible, but it's a pain and there's no real good way to do it. Look up C varargs on Google if you really want to know.

[slicer4ever]

thanks archarmic, i'll look it up

[Downsider]

Well I downloaded OSlib mod 1.0.1 and I'm trying to get it in VC++ 9. Is there an already set up development environment with OSlib that I can just write code in, or if not, how can I set it up in VC++ 9?

Thanks in advance. Please help

[homemister91]

hi,
i have been struggling with geting the current working directory (getcwd(path,265)). i am trying to be able to acsess the flash directories and be able to browse throught them. and return the cwd.
here is some of my code
Code:

int fcwd = 0;
char *cwdpath = "";
static int lua_getCurrentDirectory(l ua_State *L)
{

char path[256];
//cwdpath = getcwd(path,256);
lua_pushstring(L, cwdpath);
return 1;
}

static int lua_setCurrentDirectory(l ua_State *L)
{
char *path = luaL_checkstring(L, 1);
if(!path) return luaL_error(L, "Argument error: System.currentDirectory(f ile) takes a filename as string as argument.");
char *ddp = strpbrk (":",path);
if(ddp != NULL)
{
sceIoChdir(path);
chdir(path);
cwdpath = path;
lua_pushstring(L, cwdpath);
return 1;
}
if(strcmp(cwdpath,"ms0:/") == 0)
{
sceIoChdir(path);
chdir(path);
strcat(cwdpath, path);
lua_pushstring(L, cwdpath);
return 1;
}
if(strcmp(cwdpath,"disc0:/") == 0)
{
sceIoChdir(path);
chdir(path);
strcat(cwdpath, path);
lua_pushstring(L, cwdpath);
return 1;
}
sceIoChdir(path);
chdir(path);
strcat(cwdpath, "/");
strcat(cwdpath, path);
lua_getCurrentDirectory(L );
return 1;
}

Regards
Homemister

[_df_]

I the problems I see is your not re-allocing the size of the current buffer (or freeing... lots of mem leaks) your using for the path when your strcatting. Are you getting any specific error on calling getcwd? if getcwd doesnt work against ms0/disc0 etc then you'll need to do something like what you are doing.

As a personal rule ;) I dislike calling one lua function from another, they are doorways for the lua interpreter, rather than general shared functions to be called by anything else.

untested yadda yadda yadda. getcwd would be the best solution if it worked ;)

int fcwd = 0;
char *cwdpath = "";

static int lua_getCurrentDirectory(l ua_State *L)
{
    lua_pushstring(L, cwdpath);
    return 1;
}

static char* realloc_path(char *cpath, char *add)
{
    char *q;
    
    q = malloc(strlen(cpath) + strlen(add) + 4);
    strcpy(q, cpath);
    strcat(q, add);
    
    free(cpath);
    
    return q;
}

static int lua_setCurrentDirectory(l ua_State *L)
{
    char *path = luaL_checkstring(L, 1);
    
    if(!path) 
        return luaL_error(L, "Argument error: System.currentDirectory(file) takes a filename as string as argument.");
        
    char *ddp = strpbrk (":",path);
    
    sceIoChdir(path);
    chdir(path);
        
    if(ddp != NULL)
    {
        free(cwdpath);   
        cwdpath = path;
    }
    else if(strcmp(cwdpath,"disc0:/") == 0 || strcmp(cwdpath,"ms0:/") == 0)
    {
        cwdpath = realloc_path(cwdpath, path);
    }
    else
    {
        free(cwdpath);
        cwdpath = strdup("/");
        cwdpath = realloc_path(cwdpath, path);
    }
    
    return lua_getCurrentDirectory(L);
}

[extremealy]

hello, i want to do multiple threading.. how can i do that?
actually i'm trying to do two process at once and it is quiet difficult with one "while(1){ }"

please tell me any alternatives if multiple-threading is not possible...

thnx

[yaustar]

Why do you need two things to be done at the same time opposed to doing two things done in one frame?

[extremealy]

i want to do like because its too difficult to control and animate two objects simultanously
-= Double Post =-
hey, i'm having a problem in using triEngine... its showing me only the blue colour of the image file... the text are printing in the colour that i tell them to print but the image is not showing its all the colours... here is the main() code:

int main()
{
	SetupCallbacks();

	triInit(GU_PSM_8888);
	triInputInit();
	triFontInit();
	
	// Colors
	enum colors
	{
		RED =	0xFF0000FF,
		GREEN =	0xFF00FF00,
		BLUE =	0xFFFF0000,
		WHITE =	0xFFFFFFFF
	};
	
	triImage *bg = triImageLoad("./BG.png", TRI_VRAM);
	triImage *img = triImageLoad("./Paused.png", TRI_VRAM);
	triFont *font = triFontLoad("./Verdana.ttf", 12, TRI_FONT_SIZE_PIXELS, 128, TRI_FONT_VRAM);

	triVec2f *Stick = triInputGetStick();

	while(isrunning == 1)
	{
		triClear(0xFF0000);
		triInputUpdate();

		triDrawImage2(0, 0, bg);
		triDrawImage2(0, 0, img);

		triFontActivate(font);

		triFontPrint(font, 2, 2, RED, "aLy");
		triFontPrintf(font, 2, 30, GREEN, "x: %.5f\ny: %.5f", Stick->x, Stick->y);

		triSwapbuffers();
	}

	triFontUnload(font);
	triFontShutdown();
	triClose();
	sceKernelExitGame();
	return 0;

}

[Insert_Witty_Name]

1. Use the CODE tags.
2. Call triImageNoTint() before triSwapBuffers().
3. Multi-threading would make what you are trying to achieve even more difficult. Perhaps you need to re-think the logic that you're using to achieve the animation.

[yaustar]

i want to do like because its too difficult to control and animate two objects simultanously

How so?

[Mr305]

hello, i want to do multiple threading.. how can i do that?
actually i'm trying to do two process at once and it is quiet difficult with one "while(1){ }"

please tell me any alternatives if multiple-threading is not possible...

thnx

I asked the exact same question in the beginning... I laugh @ what I posted.

Let me dig that post. :ROFL:

[homemister91]

dear _df_
thx for the help. i have tryed you code and fixed some of it to work with mine. With the getcwd() it returns the last path that i acsessed on the ms0:/
I think it could be a proplem with R/W permisions.
Regards
Homemister

[_df_]

dear _df_
thx for the help. i have tryed you code and fixed some of it to work with mine. With the getcwd() it returns the last path that i acsessed on the ms0:/
I think it could be a proplem with R/W permisions.
Regards
Homemister

The problem with getcwd probably goes back to the same problem does has. You have multiple drives, and it has to guess (which sounds like defaults to ms0:/ all the time) which drive you want. Since getcwd is posix, posix FS's all stem from the root so you dont have this problem.

Maybe there needs to be more of an abstraction. Since there is multiple drives. Maybe there needs to be stored the current directiory of each 'drive' (and when luaplayer starts it can default them all to the root, except for ms0 which could default to the app start directory), and could have a current drive function to return ms0/flash1 etc etc etc..

that might be a big change since it would require other IO funcs be changed to force to use the current drive info unless using absolute paths..

blah. rambling on :)

[Netaro]

So, well, in c numbers can be represented as hexadecimals, that is, they can be shown as 0xXXXX, for example
int x = 0x0012
But, what if i had a text file, for example:

0x0000 0x0013 0x3394 ...
...

Then, how can i load it? of course,

 int x =0;
    ifstream plik("test.txt");
    plik >> x;
    cout << x << "\n";

THe most blatant approach is totally stupind and of course not-working at all. Theoritically, i could check it symbol-by-symbol and convert it manually, but that wouldn't be so good. So, how can i do this (using c++ standart and PSPSDK, that is both of them)?

[Insert_Witty_Name]

Use fscanf() with the %x argument.

[extremealy]

2. Call triImageNoTint() before triSwapBuffers().

Hello, thanks for help and this did the trick! But in the example that came with triEngine lib, it doesn't uses anything like tint and working fine. I recheck the whole code several times... It doesn't have much different things... Here is the sample code:

#include <pspkernel.h>
#include "../../triImage.h"
#include "../../triGraphics.h"
#include "../../triTypes.h"
#include "../../triLog.h"
#include "../../triMemory.h"

PSP_MODULE_INFO("triGfxTest", 0x0, 1, 1);
PSP_MAIN_THREAD_ATTR(PSP_THREAD_ATTR_VFPU);
PSP_HEAP_SIZE_KB(20480);

static int isrunning = 1;

/* ALL CALLBACKS HERE */
BLAH BLAH
/* ALL CALLBACKS HERE */


/* Simple thread */
int main(int argc, char **argv)
{
	SetupCallbacks();
	
	triLogInit();
	triMemoryInit();
	triInit( GU_PSM_8888 );
	
	triImage* triTri = triImageLoad( "sprite_gzip.tri", 0 );
	if (triTri==0)
	{
		triLogError("Error loading sprite_gzip.tri!\n");
		sceKernelExitGame();
		return 0;
	}
	triImageToVRAM( triTri );
	

	triImageAnimation* triAni = triImageAnimationFromSheetTga( "ani.tga", 40, 40, 5, 1, 250 );
	//triImageAnimation* triAni = triImageAnimationFromSheet( triAniImg, 40, 40, 5, 1, 250 );
	if (triAni==0)
	{
		triLogError("Error creating triImageAnimation!\n");
		sceKernelExitGame();
		return 0;
	}
	triImageAnimationStart( triAni );
	
	triImage* triBig = triImageLoad( "wallpaper.png",0 );
	if (triBig==0)
	{
		triLogError("Error loading wallpaper.png!\n");
		sceKernelExitGame();
		return 0;
	}

	if (triBig==0)
	{
		triLogError("Error loading wallpaper.raw!\n");
		sceKernelExitGame();
		return 0;
	}
	
	triBig->bits = 32;
	triBig->format = GU_PSM_8888;
	triBig->width = 864;
	triBig->height = 648;
	triBig->stride = 864;
	triBig->tex_height = 1024;*/
	
	triSpriteMode( 480, 272, 0 );
	triFloat x = 0.f, y = 0.f;
	triFloat dx = 2.f, dy = 1.0f;
	
	triFloat angle = 0.0f;
	triEnable(TRI_PSEUDO_FSAA);
	triEnable(TRI_VBLANK);
	while (isrunning)
	{
		triClear( 0xFF0000 );
		
		triDrawSprite( 0.f, 0.f, x, y, triBig );
		x += dx;
		y += dy;
		if (x>=(triBig->width-480) || x<=0) dx = -dx;
		if (y>=(triBig->height-272) || y<=0) dy = -dy;
		

		triDrawRectRotate( 32, 32, 64, 64, 0xff0000ff, angle );
		triDrawImageRotate2( 128, 32, angle, triTri );
	 	triDrawImageAnimation( 280, 32, triAni );

		triImageAnimationUpdate( triAni );

		triSwapbuffers();
		angle += 0.5f;
	}
	

	triImageAnimationFree( triAni );
	triImageFree( triTri );
	triClose();
	triMemoryCheck();
	triMemoryShutdown();
	sceKernelExitGame();
	return 0;
}

[Insert_Witty_Name]

It doesn't have fonts...

[extremealy]

aaaaaaaah..... got it! thanks!
it means whenever i use font, i should use notint function...
some font's function might change the tint settings....but that function should change it back to what user has set...
anyways, thanks :)

[Netaro]

Use fscanf() with the %x argument.

Thank you

[joseph10444]

HELP
no c history

so

can anyone explain this section of makefile

TARGET = hello
OBJS = main.o

CFLAGS = -O2 -G0 -Wall
CXXFLAGS = $(CFLAGS) -fno-exceptions -fno-rtti
ASFLAGS = $(CFLAGS)

EXTRA_TARGETS = EBOOT.PBP
PSP_EBOOT_TITLE = xxxxxxx

whats OBJECT
and TARGET mainly mean?
i think thats what im confused with, and everything else is default

[Archaemic]

OBJS are the object files to build
TARGET is the name of the final executable

[joseph10444]

okay..
because in the hello world example
i dont know why it is "main.O" in TARGET

and why it says "hello" in OBJS


okay so hello world executes fine
but the problem is where do i insert where i want it?? (eg x,y or 100,100)

right now the HELLO WORLD text is at the top left corner
what if i want it in the middle? (126, 110)

[MiKeY188]

main.o compiled you main.c file.

hello it the target and later becomes hello.elf

printf("\n\n\n\n\n\n")

\n = Newline \n\n\n\n\n\n\n = takes 7 new lines

[joseph10444]

wait so in C you cannot define where text goes like LUA???

you have to skip lines??