C/C++ Programming Help Thread

thanks, i dont think i'll ever find a need to use these anyway. :P

Zitat:

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Zitat von AdjutantReflex

...

Code:

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void trace(const char *text);

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?

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const, yesh that would be better, didn't notice he was only reading the array..
an array of chars works good as pointer to the start of a char array.

Myself, I think its a load of toss and the C++ & the String library should be used, much better.

Guys,

I'm useing LTE 2.2, right? So, I'm coding a shell for myself, I'm trying to add a button, and when I use the code I need to add the button:

" gui->addImage(menuicon, core::position2d<s32>(0,0 ), 0, 101, 0); "

I get this error:

" main.cpp:202: error: expected primary-expression before "->" token. "

Line 202 is the code I posted above.


--------
Here's the class refrence, if you need it:

virtual IGUIImage * addImage (video::ITexture *image, core::position2d< s32 > pos, bool useAlphaChannel=true, IGUIElement *parent=0, s32 id=-1, const wchar_t *text=0)=0
Adds an image element.


So what is my problem?
---------

Im not sure about your exact problem, but i looked that this in teh Hello World example:

Code:

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gui::IGUIStaticText* statusText = guienv->addStaticText(L"Hello World!",
                rect<int>(10,10,260,22), true);

---

maybe it should look something like that? I dunno, i have been looking at this LTE package for about 10 mins.

I also looked at IGUIImage.h:

Code:

---

namespace engine
{
namespace gui
{

        //! GUI element displaying an image.
        class IGUIImage : public IGUIElement
        {
        public:

                //! constructor
                IGUIImage(IGUIEnvironment* environment, IGUIElement* parent, s32 id, core::rect<s32> rectangle)
                        : IGUIElement(EGUIET_IMAGE, environment, parent, id, rectangle) {}

                //! destructor
                ~IGUIImage() {};

                //! sets an image
                virtual void setImage(video::ITexture* image) = 0;

                //! sets if the image should use its alpha channel to draw itself
                virtual void setUseAlphaChannel(bool use) = 0;
        };


} // end namespace gui
} // end namespace engine

---

EDIT: Nvm, Fixed it.

I'm having a problem, in my game every time I access the menu my game crashes, according to PSPLink, I have an FPU exception.

I was just wondering if the FPU exception is due to a lack of memory? Or something else? The thread works fine when its loaded on its own, and only throws up this error when its loaded after the rest of the program, also if I remove the blitting process it works fine, but I can't understand why, as the images have already been loaded in memory by that time.

Thanks or any help.
-Aura

And FPU exception means that something bad happened inside of the floating point unit. Generally, this is something like 1.0f/0.0f (division by zero error), which is of course impossible, but it can be other things, too.

Total 12 conditions:
---
Which one is faster?

If or else if
or
Switch

Edit: I do see it's faster for X86 platform but for Mips?

So do you have:

Code:

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if (something == somethingElse) { ...
} else if (something == somethingElse2) { ..
} else if (something == somethingElse3) {...
} ...

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with 12 "somethingElse"s? In that case, switch is faster, I'd imagine.

can some1 up umd.h. i dont want to download the new toolchain just to get on header so can someone hook me up

Zitat:

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Zitat von Archaemic

And FPU exception means that something bad happened inside of the floating point unit. Generally, this is something like 1.0f/0.0f (division by zero error), which is of course impossible, but it can be other things, too.

---

Well, by the fact it loads prefectly if the menu loads before the game, but not during the game, I'm guessing its not something to do with a divison... so... what are the "other things" that it could be?

Cheers.
-Aura

Zitat:

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Zitat von vodkkaa

can some1 up umd.h. i dont want to download the new toolchain just to get on header so can someone hook me up

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the libs have to be installed with it, you cant just use UMD.h

then again, if youve just LOST it, heres the code for pspumd.h:

Spoiler for pspumd.h:

Code:

---

/*
 * PSP Software Development Kit - http://www.pspdev.org
 * -----------------------------------------------------------------------
 * Licensed under the BSD license, see LICENSE in PSPSDK root for details.
 *
 * pspumd.h - Prototypes for the sceUmd library.
 *
 * Copyright (c) 2005 Marcus R. Brown <[email protected]>
 * Copyright (c) 2005 James Forshaw <[email protected]>
 * Copyright (c) 2005 John Kelley <[email protected]>
 *
 * $Id: pspumd.h 540 2005-07-08 19:35:10Z warren $
 */
#ifndef __UMD_H__
#define __UMD_H__

#ifdef __cplusplus
extern "C" {
#endif

/** @addtogroup UMD UMD Kernel Library */
/*@{*/

/** Enumeration for UMD stats */
enum UmdDriveStat
{
        /** Wait for disc to be inserted */
        UMD_WAITFORDISC = 2,
        /** Wait for the UMD to be initialised so it can be accessed from the mapped drive */
        UMD_WAITFORINIT                = 0x20
};

/** UMD Callback function */
typedef int (*UmdCallback)(int unknown, int event);

/**
  * Check whether there is a disc in the UMD drive
  *
  * @param a - Unknown function, set to 0
  * @return Returns 0 if no disc present, anything else indicates a disc is inserted.
  */
int sceUmdCheckMedium(int a);

/**
  * Activates the UMD drive
  *
  * @param unit - The unit to initialise (probably). Should be set to 1.
  * @param drive - A prefix string for the fs device to mount the UMD on (e.g. "disc0:")
  * @return < 0 on error
  *
  * @par Example:
  * @code
  * // Wait for disc and mount to filesystem
  * int i;
  * i = sceUmdCheckMedium(0);
  * if(i == 0)
  * {
  *    sceUmdWaitDriveStat(UMD_WAITFORDISC);
  * }
  * sceUmdActivate(1, "disc0:"); // Mount UMD to disc0: file system
  * sceUmdWaitDriveStat(UMD_WAITFORINIT);
  * // Now you can access the UMD using standard sceIo functions
  * @endcode
  *
  */
int sceUmdActivate(int unit, const char *drive);

/**
  * Wait for a drive to reach a certain state
  *
  * @param stat - The drive stat to wait for.
  * @return < 0 on error
  *
  */
int sceUmdWaitDriveStat(int stat);

/**
  * Register a callback for the UMD drive.
  * @note Callback is of type UmdCallback
  *
  * @param cbid - A callback ID created from sceKernelCreateCallback
  * @return < 0 on error
  * @par Example:
  * @code
  * cbid = sceKernelCreateCallback("UMD Callback", umd_callback);
  * sceUmdRegisterUMDCallback(cbid);
  * @endcode
  */
int sceUmdRegisterUMDCallBack(int cbid);

/*@}*/

#ifdef __cplusplus
}
#endif

#endif

---

I have an idea for a plugin. I'm assuming there's some function the VSH uses to get some sort of list of eboots to display in the game list (which dark_alex hooks to return eboots from GAME, GAME150, GAME3XX and the iso's in the ISO folder, as well as leaving out corrupt eboots). My idea is to hook this function so you you can get eboots from folders of the user's choice. When you press some button in the XMB you get an interface that lets you show/hide folders. That way, you could sort homebrew into folders (like "Games", "Applications" and "Emulators") and show/hide them at will, making a large amount of eboots easier to manage. Of course, once you change which folders are hidden you have to re-enter game->memorystick for it to refresh. Is this feasible?

Although I don't have nearly enough experience to actually do it myself...

Zitat:

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Zitat von coolguy5678

When you press some button in the XMB you get an interface that lets you show/hide folders.

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coincidentally, i've already planned on it.
-= Double Post =-
it also requires a total rewrite of the prx. upd: develop't wont begn for quite some time from my part.

When i try to install SDL_mixer, afetr i type this:

Code:

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LDFLAGS="-L$(psp-config --pspsdk-path)/lib -lc -lpspuser"

./configure --host psp --with-sdl-prefix=$(psp-config --psp-prefix) --disable-music-mp3 --prefix=$(psp-config --psp-prefix) --disable-music-libmikmod --enable-music-mod

---

it goes through some lines then trys to detect SDL, ive installed SDL already with no errors but it comes up '***SDL Version 1.2.4 not found!' How do i resolve this?

You probably have SDL installed in the wrong place.

Zitat:

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Zitat von Archaemic

You probably have SDL installed in the wrong place.

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i followed exactly what it said here Unless, theres a specific location that you can tell me about? Scroll down to the bottom to see the SDL libs. Should i re-install SDL changing some of those lines??

Wait, ignore what this post used to say. The navigation on that page is funky. Anyway, if you typed everything in properly, it should work.

i copied it, even better precision, and anyway, i just found out what was wrong, i hadnt set the environmental variables when installing SDL

I'm back with another LTE 2.2 question.

How do I add an image to a button?

(Like make the button an image).

EDIT: Omg, I figured it out..I'll edit again if I get a problem.
EDIT2: Yep...Problem:

setImage(video::ITexture *image);

Ther's the code I need.

What do I use for the *image?

I was wondering if I could use sceIoAssign to be able to run certain bits of flash0 from ms0/flash0 without hex editing. I found a post a while back on ps2dev.org, but I can't find it anymore, so if it can be done like this, could someone explain to me how I would go about it?

Cheers
-Aura

nevermind

Zitat:

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Zitat von MrChaos

I'm back with another LTE 2.2 question.

How do I add an image to a button?

(Like make the button an image).

EDIT: Omg, I figured it out..I'll edit again if I get a problem.
EDIT2: Yep...Problem:

setImage(video::ITexture *image);

Ther's the code I need.

What do I use for the *image?

---

A pointer to a video::ITexture struct/class?

EDIT: Here we go:

Code:

---

class ITexture : public IUnknown
{
public:
        virtual ~ITexture() {};

        virtual void* lock() = 0;

        virtual void unlock() = 0;

        virtual const core::dimension2d<s32>& getOriginalSize() = 0;

        virtual const core::dimension2d<s32>& getSize() = 0;

        virtual E_DRIVER_TYPE getDriverType() = 0;

        virtual ECOLOR_FORMAT getColorFormat() = 0;

        virtual s32 getPitch() = 0;

        virtual void regenerateMipMapLevels() = 0;
};

---

If that isn't relevant, i'll eat my hat.

I don't know if anyone here has tested PSPLock, but I'm having a problem with it that I can't seem to flush out.

I've replaced vshmain.prx, and made it load vshmain_real.prx, but by doing so, I can't get plugins to load properly. CXMB and SCEP and a couple of plugins of my own don't function correctly. I've not actually tested other plugins yet, but I'm assuming they are likely to be the same.

My question is, is there a prx I have to load in flash0 that activates the plugins? And if so what is it?

Thanks.
-Aura
-= Double Post =-
Just been scouring my flash0 backups and google, and I've had a thought... would I be able to solve all my problems by editing the pspbtcnf.txt file in the KN folder?

-Aura

Spoiler for origenal:

#include <assert.h>
#include <stdlib.h>
#include <string.h>

#include <pspuser.h>
#include <pspdebug.h>
#include <pspnand_driver.h>

/* Define the module info section */
PSP_MODULE_INFO("dumpipl" , 0x1000, 1, 1);
PSP_MAIN_THREAD_ATTR(0);

/* Define printf, just to make typing easier */
#define printf pspDebugScreenPrintf

int g_iPageSize, g_iPagesPerBlock, g_iBlockSize;
int g_bFlashLocked = 0;

void LockFlash();
void UnlockFlash();
void die(const char *msg);
int ReadIPLBlockTable(void *pBlockBuf);

/* Exit callback */
int exit_callback(void)
{
UnlockFlash();
sceKernelExitGame();
return 0;
}

/* Callback thread */
int CallbackThread(SceSize args, void *argp)
{
int cbid;

cbid = sceKernelCreateCallback(" Exit Callback", (SceKernelCallbackFunctio n) exit_callback, NULL);
sceKernelRegisterExitCall back(cbid);

sceKernelSleepThreadCB();
return 0;
}

/* Sets up the callback thread and returns its thread id */
int SetupCallbacks(void)
{
int thid = 0;

thid = sceKernelCreateThread("up date_thread", CallbackThread, 0x11, 0xFA0, PSP_THREAD_ATTR_USER, 0);
if(thid >= 0)
{
sceKernelStartThread(thid , 0, 0);
}

return thid;
}

void LockFlash()
{
if (!g_bFlashLocked)
sceNandLock(0);

g_bFlashLocked = 1;
}

void UnlockFlash()
{
if (g_bFlashLocked)
sceNandUnlock();

g_bFlashLocked = 0;
}

void die(const char *msg)
{
UnlockFlash();

printf("Fatal error: %s\n", msg);

while (1)
sceKernelSleepThread();
}

int ReadIPLBlockTable(void *pBlockBuf)
{
u16 *pBlockTable;
u32 uiBlockNum = 4;
u32 uiSearchCount = 8;
int iBlockCount;

/* You must always get exclusive access to the flash device before reading
from it or writing to it. */
LockFlash();
memset(pBlockBuf, 0, g_iBlockSize);

while (uiSearchCount > 0)
{
u32 uiPPN = uiBlockNum * g_iPagesPerBlock;

if (!sceNandIsBadBlock(uiPPN ))
{
if (sceNandReadBlockWithRetr y(uiPPN, pBlockBuf, NULL) < 0)
{
die("can't read IPL block table!");
}

printf("Found IPL block table at block %d\n", uiBlockNum);
break;
}

uiBlockNum++;
uiSearchCount--;
}

/* Count the number of blocks used by the IPL. */
pBlockTable = (u16 *) pBlockBuf;
iBlockCount = 0;

while (*pBlockTable != 0)
{
iBlockCount++;
pBlockTable++;
}

if (iBlockCount)
printf("IPL spans a total of %d blocks.\n", iBlockCount);

UnlockFlash();
return iBlockCount;
}

int main(int argc, char *argv[])
{
void *pBlockBuf;
u16 *pBlockTable;
int iBlockCount, iBlock;
int fd;

pspDebugScreenInit();
SetupCallbacks();

g_iPageSize = sceNandGetPageSize();
g_iPagesPerBlock = sceNandGetPagesPerBlock() ;
g_iBlockSize = g_iPageSize * g_iPagesPerBlock;

/* Read buffer for blocks. */
pBlockBuf = malloc(g_iBlockSize);
assert(pBlockBuf);

iBlockCount = ReadIPLBlockTable(pBlockB uf);
if (!iBlockCount)
die("IPL block count is 0!");

pBlockTable = (u16 *) malloc(iBlockCount * sizeof(u16));
memcpy(pBlockTable, pBlockBuf, iBlockCount * sizeof(u16));

fd = sceIoOpen("ms0:/ipl.bin", PSP_O_WRONLY | PSP_O_CREAT, 0777);
if (fd < 0)
die("can't open ms0:/ipl.bin for writing!");

/* Write out each block of the IPL. */
for (iBlock = 0; iBlock < iBlockCount; iBlock++)
{
u32 uiPPN = pBlockTable[iBlock] * g_iPagesPerBlock;

LockFlash();

if (sceNandReadBlockWithRetr y(uiPPN, pBlockBuf, NULL) < 0)
{
sceIoClose(fd);
die("can't read block from IPL!\n");
}

UnlockFlash();

if (sceIoWrite(fd, pBlockBuf, g_iBlockSize) < 0)
{
sceIoClose(fd);
die("can't write data to file!\n");
}
}

sceIoClose(fd);
free(pBlockTable);
free(pBlockBuf);

printf("\nFinished writing IPL to ms0:/ipl.bin. Use [HOME] to exit.\n");
sceKernelSleepThread();
return 0;
}

Spoiler for rewritten:

/*made by * Copyright (c) 2005 Marcus R. Brown <[email protected]>
* Copyright (c) 2005 James Forshaw <[email protected]>
* Copyright (c) 2005 John Kelley <[email protected]>*/
#include <assert.h>
#include <pspdebug.h>
#include <pspuser.h>
#include <pspnand_driver.h>
#include <stdlib.h>
#include <string.h>

#include "mainMenu.h"

int nandPageSize, nandPagesPerBlock, nandBlockSize;
int flashLocked = 0;

void lockFlash();
void unLockFlash();
void die(const char *msg);
int readIplBlockTable(void *pBlockBuf);

void lockFlash()
{
if (!flashLocked)
sceNandLock(0);

flashLocked = 1;
}

void unLockFlash()
{
if (flashLocked)
sceNandUnlock();

flashLocked = 0;
}

void die(const char *msg)
{
unLockFlash();

pspDebugScreenPrintf("Fat al error: %s\n", msg);
faExit();
}

int readIplBlockTable(void *pBlockBuf)
{
u16 *pBlockTable;
u32 uiBlockNum = 4;
u32 uiSearchCount = 8;
int iBlockCount;
/* You must always get exclusive access to the flash device before reading
from it or writing to it. */
lockFlash();
memset(pBlockBuf, 0, nandBlockSize);

while (uiSearchCount > 0)
{
u32 uiPPN = uiBlockNum * nandPagesPerBlock;
if (!sceNandIsBadBlock(uiPPN ))
{
if (sceNandReadBlockWithRetr y(uiPPN, pBlockBuf, NULL) < 0)
die("can't read IPL block table!");
pspDebugScreenPrintf("Fou nd IPL block table at block %d\n", uiBlockNum);
break;
}

uiBlockNum++;
uiSearchCount--;
}

/* Count the number of blocks used by the IPL. */
pBlockTable = (u16 *) pBlockBuf;
iBlockCount = 0;

while (*pBlockTable != 0)
{
iBlockCount++;
pBlockTable++;
}

if (iBlockCount)
pspDebugScreenPrintf("IPL spans a total of %d blocks.\n", iBlockCount);

unLockFlash();
return iBlockCount;
}

int dumpIpl(const char *dst)
{
void *pBlockBuf;
u16 *pBlockTable;
int iBlockCount, iBlock;
int fd;

pspDebugScreenClear();

nandPageSize = sceNandGetPageSize();
nandPagesPerBlock = sceNandGetPagesPerBlock() ;
nandBlockSize = (nandPageSize * nandPagesPerBlock);


/* Read buffer for blocks. */
pBlockBuf = malloc(nandBlockSize);
assert(pBlockBuf);

iBlockCount = readIplBlockTable(pBlockB uf);
if (!iBlockCount)
die("IPL block count is 0!");



pBlockTable = (u16 *) malloc(iBlockCount * sizeof(u16));
memcpy(pBlockTable, pBlockBuf, iBlockCount * sizeof(u16));



fd = sceIoOpen(dst, PSP_O_WRONLY | PSP_O_CREAT, 0777);
if (fd < 0)
die("can't open dst for writing!");

/* Write out each block of the IPL. */
for (iBlock = 0; iBlock < iBlockCount; iBlock++)
{
u32 uiPPN = pBlockTable[iBlock] * nandPagesPerBlock;
lockFlash();
if (sceNandReadBlockWithRetr y(uiPPN, pBlockBuf, NULL) < 0)
{
sceIoClose(fd);
die("can't read block from IPL!\n");
}
unLockFlash();
if (sceIoWrite(fd, pBlockBuf, nandBlockSize) < 0)
{
sceIoClose(fd);
die("can't write data to file!\n");
}
}
sceIoClose(fd);
free(pBlockTable);
free(pBlockBuf);

pspDebugScreenPrintf("\nF inished writing IPL to %s. \nGOING BACK IN 2 SECONDS" , dst);
faWait(2);
dumpMenu();
return 0;
}

someone sees what i doe wrong?
-= Double Post =-
it crashes at
nandPageSize = sceNandGetPageSize();

anyone figure out how to make vshex load up image files like png format?

i know bmp files are possible because someone did it before but i lost all my old source code to dig that up. but it would be nice if png in vshex was possible too

i know this is really basic aura but did you add it to vsh.txt
:) :P iono otherwise i don't think there is a plugin you have to load

Zitat:

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Zitat von A-Sylum

i know this is really basic aura but did you add it to vsh.txt
:) :P iono otherwise i don't think there is a plugin you have to load

---

PSPLock isn't a plugin, it replaces vshmain.prx, and because of this plugins don't load correclty... or at least didn't load correctly... my above post can now be ignored because of solved that problem :Jump:

My only problem now is that I can't get cxmb to load correctly, after that, everything should be working correctly.

-Aura

This is my first try at using dirents. But my application freezes, nothing gets printed on the screen either. Anyone know why? :

Code:

---

#include <pspdisplay.h>
#include <pspctrl.h>
#include <pspkernel.h>
#include <pspdebug.h>
#include <pspiofilemgr.h>
#include "callbacks.h"

#define printf pspDebugScreenPrintf
#define MAX_DIRS 256

PSP_MODULE_INFO( "File Mgr", 0, 1, 1 );

int main()
{
    pspDebugScreenInit();
    SetupCallbacks();
   
    SceUID directoryID;
    SceIoDirent directoryEntry[MAX_DIRS];
    int DirLeft = 1;
    int DirCount = 0;
    int i;
   
    directoryID = sceIoDopen( "ms0:/" );
    if( directoryID < 0 )
    {
        printf( "Error opening directory\n" );
        sceKernelExitGame();
    }
   
    while( DirLeft != 0 )
    {
          DirLeft = sceIoDread( directoryID, &directoryEntry[DirCount] );
          if( DirLeft == 0 )
          {
              break;
          }
          if( DirLeft < 0 )
          {
              printf( "Error reading directory entries\n" );
              sceKernelExitGame();
          }
          DirCount++;
    }
   
    for( i = 0; i <= DirCount; i++ )
    {
          printf( "%s\n", directoryEntry[DirCount].d_name );
    }
   
    sceIoDclose( directoryID );
    printf( "There is a total of %d directory entries", (DirCount + 1) );

    sceKernelSleepThread();
    return 0;
}

---

:Argh:

What do you have to put in your makefile if you're using c++ ?

Been searching for an hour and havent found it.

Or dont you actually need to add anything to your makefile ?

Code:

---

#include <pspdisplay.h>
#include <pspctrl.h>
#include <pspkernel.h>
#include <pspdebug.h>
#include <pspiofilemgr.h>
#include "callbacks.h"

#define printf pspDebugScreenPrintf

PSP_MODULE_INFO( "File Mgr", 0, 1, 1 );

int main()
{
    pspDebugScreenInit();
    SetupCallbacks();
   
    SceUID directoryID;
    SceIoDirent directoryEntry;
    int DirLeft = 1;
    int DirCount = 0;
    int i;
   
    directoryID = sceIoDopen( "ms0:/" );
    if( directoryID < 0 )
    {
        printf( "Error opening directory\n" );
        sceKernelExitGame();
    }
   
    while( DirLeft != 0 )
    {
          DirLeft = sceIoDread( directoryID, &directoryEntry);
          if( DirLeft == 0 )
          {
              break;
          }
          if( DirLeft < 0 )
          {
              printf( "Error reading directory entries\n" );
              sceKernelExitGame();
          }
          printf( "%s\n", directoryEntry.d_name );
          DirCount++;
    }
   
    sceIoDclose( directoryID );
    printf( "There is a total of %d directory entries", (DirCount + 1) );

    sceKernelSleepThread();
    return 0;
}

---

Try that instead. Not only is it hugely more efficient, it should work now. If it doesn't, insert traces or use PSPLink. That way you won't have to ask all the time for help. C'mon, basic debugging skills here.

Zitat:

---

Zitat von Archaemic

Try that instead. Not only is it hugely more efficient, it should work now. If it doesn't, insert traces or use PSPLink. That way you won't have to ask all the time for help. C'mon, basic debugging skills here.

---

But the struct only holds information for ONE Dirent, i want more than one Dirent to be listed on the screen :|

do you have to put anything in your makefile if you're using c++ ?

Zitat:

---

Zitat von JaSo PsP

But the struct only holds information for ONE Dirent, i want more than one Dirent to be listed on the screen :|

---

That WILL list more than one Dirent on the screen :dry:

Zitat:

---

Zitat von eldiablov

do you have to put anything in your makefile if you're using c++ ?

---

-lstdc++ under libs, i think...

i love you. In a non homosexual way

Zitat:

---

Zitat von Archaemic

That WILL list more than one Dirent on the screen :dry:

---

Yeh, but say i wanted to enter one of the directories listed, what do i do then, 'int sceIoChdir(const char *path);' Then how would i list the directories inside that? use sceIoDopen again?

Okay, so copy the d_name members into an array of char*s.
(Make sure to allocate a new char* with the same length as d_name, because the pointer contained in d_name will become invalid.)

ok, the code above still freezes? how do i trace, i haven done it before. :P

you have to create your own trace function i believe as i haven't seen any function on the psp that does this, although it's fairly simple just create a function that well write text to a file