C/C++ Programming Help Thread

[Gusjdt]

Hello again,

I've been getting some strange errors when I try to compile a project I'm working on. These are the errors:

psp-gcc -I. -I/cygdrive/c/CSP/cygwin/usr/local/pspdev/psp/sdk/include -O2 -G0 -W
all -D_PSP_FW_VERSION=150   -c -o main.o main.c
In file included from main.c:10:
Game.h:20: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'Game'

Game.h:68: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'Enemy
'
Game.h:118: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'Hero
'
make: *** [main.o] Error 1

I've had these errors before, but I do not remember how I managed to fix it. Does anyone know what these mean? Apparantly these are common when I googled them.

Here is the header file:

// Game.h - Contains the *Game Parent Class* and its *Child Sub-Classes*

#ifndef GAME_H_
#define GAME_H_

/*---------------------------------------*/
/*                                       */
/* PARENT CLASS DECLARATION - Game CLASS */
/*                                       */
/*---------------------------------------*/

class Game
{
	// Data Member Declarations
	
	public:
	//Constructor
	Game();
	
	//Destructor
	~Game();
	
	protected:
	//Methods
	void HeroIsAttacked(Hero & theHero, Enemy & theEnemy);
	void EnemyIsAttacked(Enemy & theEnemy, Hero & theHero);
	
	//Variables
};

/*---------------------------------------*/
/*                                       */
/* CHILD CLASS DECLARATION - Enemy CLASS */
/*                                       */
/*---------------------------------------*/

class Enemy : public Game
{
	// Data Member Declarations
	public:
	// Constructor
  Enemy(char cst_name[15]);
	
	// Destructor
	~Enemy(); 
	
	// Methods
	int defend();
	
	// Vars
	char enemyName[];
	int mE_attackPts; 
	int mE_healthPts;
	int mE_defendPts;
};

/*---------------------------------------*/
/*                                       */
/* CHILD CLASS DECLARATION - Hero CLASS  */
/*                                       */
/*---------------------------------------*/

class Hero : public Game
{
	// Data Member Declarations
	public:	
	// Constructor
	Hero(bool isMale);
	
	// Destructor
	~Hero();
	
	// Methods
	int defend();
	
	// Vars
	int mH_attackPts;
	int mH_healthPts;
	int mH_defensePts;
	bool mH_gender;
};
	
#endif

The method definitions are in another .c file btw, and main.c has #include "Game.h".

Any ideas?

[Archaemic]

The file you've provided has less lines than the output suggests. Are you sure it's the right file?

[hallo007]

.set noreorder

#include "pspstub.s"

STUB_START "NandDumper",0x40090000,0 x00010005
STUB_FUNC 0x9EDD6EE1,readBlock
STUB_END

what's wrong with this?

psp-g++ -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall -fno-exceptions -fno-rtti   -c -o main.o main.cpp
psp-g++ -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall -fno-exceptions -fno-rtti   -c -o io.o io.cpp
psp-gcc -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall   -c -o NandDumper.o NandDumper.S
psp-gcc -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall -D_PSP_FW_VERSION=150  -L. -L/usr/local/pspdev/psp/sdk/lib   main.o io.o NandDumper.o -lpsppower -lstdc++ -lpsprtc -lpspnand_driver -lpspdebug -lpspdisplay -lpspge -lpspctrl -lpspsdk -lc -lpspnet -lpspnet_inet -lpspnet_apctl -lpspnet_resolver -lpsputility -lpspuser -lpspkernel -o powersample.elf
io.o: In function `dumpNand()':
io.cpp:(.text+0x1b8): undefined reference to `readBlock(unsigned long, unsigned char*)'

I found a solution , when I compille it as c , it'd just works fine
any reason it doesn't works with c++?

[Gusjdt]

The file you've provided has less lines than the output suggests. Are you sure it's the right file?

Yes I'm sure. I'm not sure if you're the one I mentioned to that sometimes the lines are incorrect. Like if it says error on a string in line 32, when line 32 is blank. I have no idea why it does that. : /

[Xsjado7]

Hey everyone, i was just wondering if anyone knew a library that has mp3 playback othre than mp3player.c. thanks

[yaustar]

Hello again,

I've been getting some strange errors when I try to compile a project I'm working on. These are the errors:

code snipped

The method definitions are in another .c file btw, and main.c has #include "Game.h".

Any ideas?

You are using C++ so your files need to be .cpp not .c

[Raphael]

Okay, already did that with that post. All I copied and pasted was the function names, NOT the arguments. You'll see I changed a lot of things. All I did wrong was forget what arguments sceIoWriteAsync took. I thought he was trying to write the address, and I momentarily forgot that it took a pointer and not something like printf takes. Writing the contents of the address would be pretty pointless because we already know it would be 140 if the match succeeds.

Sorry, I was actually referring to JaSo PSP, not you. You gave him lots of hints of what he could do better and had a small mistake left in your code - which he just copied and pasted and then wondered why it didn't work. That's stupid. Basically, with this mentality, you could have given him the code for a bricker and he would have tested it, seeing how his PSP gets bricked just because he didn't take the effort to see what the code actually does.
And the error was pretty obvious if you know what you're doing and trying to do - at least you seem to, seeing the corrected version.

[Gusjdt]

You are using C++ so your files need to be .cpp not .c

Thanks again Yaustar, I appreciate it. I knew it was something silly...

[placo23]

Guys I'll post this again, as the last one got one answer, but when I tried to contact the guy who answered, I got no response.

+++++++++++++++
Hi, is somebody here using DSX to display stuff on the XMB?

I'm currently working on a plugin, and am finding that it's flickering a bit. Also, it's conflicting with some items on the XMB, such as video and browser.

I thought about either disabling it when loading video or browser, or find a way to fix it.

Also the flickering thing is very annoying

Does anyone know how to fix that?

Cheers

[Raphael]

Conflicting with browser/video: Plugin takes too much memory, code better
Flickering: Hook sceDisplaySetFrameBuf and do your drawing before calling the original function

[JaSo PsP]

I changed 'i' to '&i' anyway, i just didn't mention it here...

[placo23]

Conflicting with browser/video: Plugin takes too much memory, code better
Flickering: Hook sceDisplaySetFrameBuf and do your drawing before calling the original function

Thanks for that Raphael. I know you answered me on the other forum about this, but my pc has been a bit flakey lately. Sorry for not sending you another message.

In fact, I think it's the vsxlib that uses too much memory, as I'm sure my plugin is very light.

I tried to use sceDisplaySetFrameBuf, but it didn't really change much. I don't know if I'm using it the wrong way, but basically, even if I print a basic hello world on the screen using vsx ans try to use sceDisplaySetFrameBuf, I still have the flickering.

Do you know what else it could be? Or, do you have any example using this lib that doesn't flicker and doesn't crash the browser?

Would you suggest a library change (from vsx to another)?

Thank you very much!

[Raphael]

By "hooking" I meant you should use something like API hook by Tyranid or write your own function hooking to be able to intercept the firmwares own calls to sceDisplaySetFramebuf and get your own drawing done before the VSH swaps the framebuffer. By doing that you won't get any flickering ever (see JoySens plugin).
If you don't understand a single word of that - well, then you better just live with the flickering for the moment.

[Anti-QuickJay]

How do I write a single bit to a file?

[Archaemic]

You can't. You can modify the byte that you want, but you can't modify bit at a time.

[pspN00bDevoloper]

im making an app and my menu is like this:

void refreshArrow(void)
{
	setXY(2, rowprev + row_offset);
	printf("  ");
	setXY(2, row + row_offset);
	printf("->");

}

main
{
             ......

	row = 0;
	rowprev = 0;
	maxrows = 4;

        printf("*    Start ");
        printf("\n*    Settings");
        printf("\n*    Choose Playlist");
        printf("\n*    Exit");
	refreshArrow();
	
		unsigned int b;
		b = wait_press(PSP_CTRL_UP|PSP_CTRL_DOWN|PSP_CTRL_CROSS);
		wait_release(PSP_CTRL_UP|PSP_CTRL_DOWN|PSP_CTRL_CROSS);
	
		if (b & PSP_CTRL_DOWN) {
			rowprev = row;
			if (row == maxrows) row = 0;

			else if (row == (maxrows - 1)) row += 1;
			else row++;
			refreshArrow();
		}
		else if (b & PSP_CTRL_UP) {
			rowprev = row;
			if (row == 0) row = maxrows;

			else if (row == maxrows) row -= 1;
			else row--;
			refreshArrow();
		}
		else if (b & PSP_CTRL_CROSS) {
			if (row == maxrows) {
			setXY(5, 25);
			printf("Good Bye");
			sceKernelDelayThread(3 * 1000 * 1000);
			
                                vshKernelExitVSHVSH(NULL);
			    } 
.....
rest of code

this is taken from Cory's Pandora Battert Menu source and what i want to know is how can I make the selected menu item higlighted in a color like this:

Start
Settings
Choose Playlist
Exit

so its not like this:

   Start
-> Settings
   Choose Playlist
   Exit

Im sorry but Im really a noob.

[BigSanFrey]

read here:

HERE

it is about creating a menu.

[pspN00bDevoloper]

I don't need to know how to make a menu, as you can see I already Have 1. I just want to make it look nicer.

[BigSanFrey]

if you use that code you can use colours, it was just an option...

[pspN00bDevoloper]

But then I have to rewrite alot of code just for some simple colors. I just want a simple sloution to highlight the selected item.

[BigSanFrey]

Okay, I am trying to make a little game but i keep getting an error..

main.c: In function ‘CallbackThread’:
main.c:22: error: ‘pad’ undeclared (first use in this function)
main.c:22: error: (Each undeclared identifier is reported only once
main.c:22: error: for each function it appears in.)
main.c:23: error: ‘y’ undeclared (first use in this function)
main.c: In function ‘main’:
main.c:66: warning: operation on ‘x’ may be undefined
main.c:71: warning: operation on ‘x’ may be undefined
main.c:76: warning: operation on ‘y’ may be undefined
main.c:81: warning: operation on ‘y’ may be undefined
make: *** [main.o] Error 1

(main function code)

int main(void) {
    pspDebugScreenInit();
    SetupCallbacks();
    SceCtrlData pad;

    int ok = 1;
    int x = 100;
    int y = 100;
    int width = 50;
    int height = 50;

    Color red = RGB(0, 255, 0);
    Image* Background;
    Background = loadImage("./Images/Background.png");

    while(1) {
	sceCtrlReadBufferPositive(&pad, 1);

	blitAlphaImageToScreen(0, 0 , 480, 272, Background, 0, 0);

	// move square left
      if(pad.Buttons & PSP_CTRL_SQUARE) {
	x = x--;
      }

	// move square right
      if(pad.Buttons & PSP_CTRL_CIRCLE) {
	x = x++;
      }

	// move square up
      if(pad.Buttons & PSP_CTRL_TRIANGLE) {
	y = y--;
      }

	// move square down
      if(pad.Buttons & PSP_CTRL_CROSS) {
	y = y++;
      }


	// draw our little square!
      if(ok >= 1){
	fillScreenRect(red, x, y, width, height);
      }

	sceDisplayWaitVblankStart();
	flipScreen();

    }	
    sceKernelSleepThread();
    return 0;
}

[placo23]

im making an app and my menu is like this:

void refreshArrow(void)
{
	setXY(2, rowprev + row_offset);
	printf("  ");
	setXY(2, row + row_offset);
	printf("->");

}

main
{
             ......

	row = 0;
	rowprev = 0;
	maxrows = 4;

        printf("*    Start ");
        printf("\n*    Settings");
        printf("\n*    Choose Playlist");
        printf("\n*    Exit");
	refreshArrow();
	
		unsigned int b;
		b = wait_press(PSP_CTRL_UP|PSP_CTRL_DOWN|PSP_CTRL_CROSS);
		wait_release(PSP_CTRL_UP|PSP_CTRL_DOWN|PSP_CTRL_CROSS);
	
		if (b & PSP_CTRL_DOWN) {
			rowprev = row;
			if (row == maxrows) row = 0;

			else if (row == (maxrows - 1)) row += 1;
			else row++;
			refreshArrow();
		}
		else if (b & PSP_CTRL_UP) {
			rowprev = row;
			if (row == 0) row = maxrows;

			else if (row == maxrows) row -= 1;
			else row--;
			refreshArrow();
		}
		else if (b & PSP_CTRL_CROSS) {
			if (row == maxrows) {
			setXY(5, 25);
			printf("Good Bye");
			sceKernelDelayThread(3 * 1000 * 1000);
			
                                vshKernelExitVSHVSH(NULL);
			    } 
.....
rest of code

this is taken from Cory's Pandora Battert Menu source and what i want to know is how can I make the selected menu item higlighted in a color like this:

Start
Settings
Choose Playlist
Exit

so its not like this:

   Start
-> Settings
   Choose Playlist
   Exit

Im sorry but Im really a noob.

Well that's basical logic, but I'll tell you how to do giving you the logic and not simply the code.

Basically the idea is:

You have a loop right?

In the loop, you need to check the cursor position everytime.

I see that you're doing that with the "row" variable.

You can just put an if around each of the items in the menu like

if(row == 1)
set other colour here
printf("Start ");
set colour back to the original

if(row == 2)
set other colour here
printf("item2 ");
set colour back to the original

Then you'll have colours on your menu


You shouldn't just copy things from other soucrs, it's so much more fun if you do it from scratch.

Also I'm sure that there's some code in your menu that you don't even know why is there.

If you need another example, post back, but I think you should try to figure out by yourself with the logic I gave you.

Cheers

[yaustar]

x = x--;

And any similar code is undefined because you post evaluate x, assign it to itself and then decrement itself. The undefined part comes in the order of the operations differ with different compilers.

What you want is either:

x = x - 1;

or

--x;

[BigSanFrey]

okay thanks :), also where can i find a basic tutorial on how to make a PRX? (one for on the XMB (VSH)?)

[placo23]

okay thanks :), also where can i find a basic tutorial on how to make a PRX? (one for on the XMB (VSH)?)

Just look for VSX or VSH Blit

There's some examples, and it's pretty easy.

Also, you may look at VSH Bitter 0.2 posted on this topic somewhere

[Auraomega]

I want to display a volume bar much like the PSPs own, but I'm not sure how to check what the volume is, the only examples I have found don't actually do what I need they appear to change a different volume, I want, for example, the left and right shoulder buttons to do what the + and - volume buttons do, but to also display that same bar in an app.

Sorry if I didn't explain that well, I'm not sure how to explain it, if none of that made sense I'll try and think of another way of saying it.

-Aura

[coolguy5678]

@BigSanFrey: Why are you trying to access pad and y in your CallbackThread function?

[placo23]

I want to display a volume bar much like the PSPs own, but I'm not sure how to check what the volume is, the only examples I have found don't actually do what I need they appear to change a different volume, I want, for example, the left and right shoulder buttons to do what the + and - volume buttons do, but to also display that same bar in an app.

Sorry if I didn't explain that well, I'm not sure how to explain it, if none of that made sense I'll try and think of another way of saying it.

-Aura

Aura, have you tried looking at the User Udio Library? (http://psp.jim.sh/pspsdk-doc/group__Audio.html) well I believe so, but thought it'd worth sending the link.

I think you need to know what the channel is. As far as I'm aware, there's 8 chanels. And *if* I'm not mistaken, you could just test'em too see if the volume increases or decreses. Then you'd need to be able to siplay the actual bar

[Auraomega]

I was using that library before, I guess it would make logical sense to check all of the channels, one is bound to be the correct one.

Displaying the bar shouldn't be too hard, if worst comes to worst, I guess I could simply make my own which in the end is what I was going to do, it just means I go from A to C without B

I'll try all that later when I get access to a compiler, thanks for that :)

-Aura

[coolguy5678]

Okay, I need some help with something. I need to get a list of files in a directory. I've found how do it using sceIoDopen and so on, but that requires the path to that directory to be hard-coded. For example, I might expect the directory to be in ms0:/PSP/GAME/blah/huh/, but the user might have placed the eboot in GAME150, so it would fail. For normal file reading, I've used the f-something functions (fopen, fread etc.) instead of the SceIo* functions, so I can use relative paths. But how do I do this for finding the files in a directory?