C/C++ Programming Help Thread

[eldiablov]

If you're using SEEK_SET and you start counting from 0, yes.

Thanks for the info Archaemic :)

char gameid[40];
target = sceIoOpen("disc0:/PSP_GAME/SYSDIR/UPDATE/PARAM.SFO", PSP_O_WRONLY, 0777);
gameid = sceIoLseek(target, 362, SEEK_SET);
sceIoClose(target);

Would this code work as it is?

[Insert_Witty_Name]

You might want to actually use sceIoRead to read something too.

Also, error check that the file is actually opened etc.

[eldiablov]

You might want to actually use sceIoRead to read something too.

int a;
char gameid[40];
target = sceIoOpen("disc0:/PSP_GAME/SYSDIR/UPDATE/PARAM.SFO", PSP_O_WRONLY, 0777);
gameid = sceIoLseek(target, 362, SEEK_SET);
a = sceIoRead(target, void *gameid, 40);
sceIoClose(target);

The check will be put in place; but is that correct for now? I just want to make sure I actually understand the functions.

[Team-3GO]

did someone ever added a png background to filebrowser.h?
the png showed up fine but no text at all.

also im wondering if there is a sample how to load a prx from a 3.xx app.
obvious i need a external kmode prx with the loader funktion which i load from my usermode app. any hints?

thanks in advance

[Judas]

did someone ever added a png background to filebrowser.h?
the png showed up fine but no text at all.

also im wondering if there is a sample how to load a prx from a 3.xx app.
obvious i need a external kmode prx with the loader funktion which i load from my usermode app. any hints?

thanks in advance

That's probably because you blitted the text before the background. Try blitting the background first.

[Archaemic]

int a;
char gameid[40];
target = sceIoOpen("disc0:/PSP_GAME/SYSDIR/UPDATE/PARAM.SFO", PSP_O_WRONLY, 0777);
gameid = sceIoLseek(target, 362, SEEK_SET);
a = sceIoRead(target, void *gameid, 40);
sceIoClose(target);

The check will be put in place; but is that correct for now? I just want to make sure I actually understand the functions.

No, it's not.

char gameid[40];
target = sceIoOpen("disc0:/PSP_GAME/SYSDIR/UPDATE/PARAM.SFO", PSP_O_RDONLY, 0777);
sceIoLseek(target, 362, SEEK_SET);
sceIoRead(target, (void *) gameid, 40);
sceIoClose(target);

Note that this code has NO checks as it is, and that I have no clue if that offset or length is correct. There is also a chance that gameid won't be NULL-terminated after the read, so be careful.

Note! I changed PSP_O_WRONLY to PSP_O_RDONLY. This is an important change, even if it is easy to miss!

[Auraomega]

I'm having some problems with Project4 that I can't understand, I'm just wondering if anyone here can help me.

I've moved all the graphics handling (graphics.c intraFont.c) into an external prx that I load and link to. When I try loading it with pspSdkLoadStartModule it returns error 0x800000D1 which is SCE_KERNEL_ERROR_ILLEGAL_ PERM, I'm not sure what the error means, or what I've done wrong.

My next question is how or what is flash2 when trying to access it? I'm trying to write a file to flash2 (and flash3) and read it back, but I keep getting the nodev error (0x80000321).

Is there any way I can check what variables are being passed between modules, or is there any way I can check what heaps are currently allocated?

How can I get things printed on the PSPLink shell when running in 3.XX on 3.52? I never had this problem in 3.40LE, but have done ever since moving to 3.52 (does this happen on 3.71?).

How should I got about loading a PSX game? I've tried

sctrlKernelLoadExecVSHWithApitype(0x143, bpath, &param);

Where param.key is game, pops, psx. I'm guessing the key is wrong but I can't work out what it is meant to be, so if anyone knows...?

(Not sure if this is allowed or not, if its not let me know and I'll remove it) When using sctrlSEMountUmdFromFile for M33 or NP9660 it returns a nodev error, but works fine for ISOFs if its enabled in recovery, I've tried loading the modules from flash0, but no luck.

Anyone?

Also, I'm having a really odd problem, since I've started using intraFont I can't load games when running in VSH mode, only when running in GAME mode, which is causing obvious problems for Project4.

-Aura

[SuperBatXS]

Why isn't this working?

char xoptions[7];
FILE *options;
if ((options = fopen("./files/options.txt","rb")) == NULL)
{
     printf("Please Check Your Options.txt");
}
xoptions[fread(xoptions, 1, 4, options)] = 0;
fclose(options);
xoptions[7]=0;

//Cpu
switch(xoptions[0]) {
    case 's': cpudisplay = 111; break;
    case 'n': cpudisplay = 222; break;
    case 'f': cpudisplay = 333; break;
    }
CpuPower(cpudisplay, cpudisplay, cpudisplay/2);

[tommydanger]

Why isn't this working?

char xoptions[7];
FILE *options;
if ((options = fopen("./files/options.txt","rb")) == NULL)
{
     printf("Please Check Your Options.txt");
}
xoptions[fread(xoptions, 1, 4, options)] = 0;
fclose(options);
xoptions[7]=0;

//Cpu
switch(xoptions[0]) {
    case 's': cpudisplay = 111; break;
    case 'n': cpudisplay = 222; break;
    case 'f': cpudisplay = 333; break;
    }
CpuPower(cpudisplay, cpudisplay, cpudisplay/2);

whats that for some f****d up code ?!

if ((options = fopen("./files/options.txt","rb")) == NULL)
{
printf("Please Check Your Options.txt");
}

this will do it aswell:

if (fopen("./files/options.txt","rb") == NULL)
{
printf("Please Check Your Options.txt");
}

but this is a better coding style:

if (!fopen("./files/options.txt","rb"))
{
printf("Please Check Your Options.txt");
}

and please tell me what this is supposed to be:

xoptions[fread(xoptions, 1, 4, options)] = 0;

?!?!
this will in the best case equal to:

xoptions[4] = 0;

o_O

next is:

char xoptions[7];
..
..
..
xoptions[7]=0;

char array with 7 elements, yet you try to write to the 8th element, note it starts from zero ;)

you sure what you're doing ?
ah and to know what exactly went wrong would be good to know too as I see many possibilities why this doesn't work the way it is meant to be ;)

[amrcidiot]

I need help, When I go to to compile in linux I get this:

[email protected]:/usr/local/pspdev/projects/counter# make
make: psp-config: Command not found
Makefile:12: /lib/build.mak: No such file or directory
make: *** No rule to make target `/lib/build.mak'. Stop.

this is my Makefile:

TARGET = count
OBJS = main.o

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

EXTRA_TARGETS = EBOOT.PBP
PSP_EBOOT_TITLE = Counter

PSPSDK=$(shell psp-config --pspsdk-path)
include $(PSPSDK)/lib/build.mak

I followed This Tutorial.

Can anyone help?

[Archaemic]

echo 'export PSPDEV=/usr/local/pspdev' >> ~/.bashrc
echo 'export PATH=$PATH:$PSPDEV/bin' >> ~/.bashrc

Make sure to use apostrophes and not quotes.

Also, I wouldn't follow tommydanger's advice on the fopen line--all that does is check if the file can be opened, and discard the file handle if it can be opened. What a waste. You can only have 9 or so file handles open at once, so don't waste them.

[amrcidiot]

thanks
where do I add that?
or do I put it in the terminal?
I tried and it and nothing worked?
What fopen line?

[Archaemic]

You have to restart the terminal after entering that in. Paste what happens when you enter
tail ~/.bashrc
into the terminal

Also, the fopen line thing was not directed at you.

[amrcidiot]

#alias ll='ls -l'
#alias la='ls -A'
#alias l='ls -CF'

# enable programmable completion features (you don't need to enable
# this, if it's already enabled in /etc/bash.bashrc and /etc/profile
# sources /etc/bash.bashrc).
if [ -f /etc/bash_completion ]; then
. /etc/bash_completion
fi





that shows up
-= Double Post =-
After i did "make" I get this now:

psp-gcc -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall -D_PSP_FW_VERSION=150 -c -o main.o main.c
main.c: In function ‘main’:
main.c:51: error: expected expression before ‘[’ token
main.c:53: error: expected ‘;’ before ‘}’ token
main.c:46: warning: unused variable ‘i’
main.c:45: warning: unused variable ‘counter’
main.c: At top level:
main.c:55: error: expected identifier or ‘(’ before ‘while’
make: *** [main.o] Error 1

Spoiler for SOURCE:

//w/e- By Amrcidiot

/* random
random
*/

#include <pspkernel.h>
#include <pspdebug.h>
#include <pspdisplay.h>
#include <pspctrl.h>

PSP_MODULE_INFO("Counter" , 0,1,1);
#define printf pspDebugScreenPrintf

int exit_callback(int arg1, int arg2, void *common) {
sceKernelExitGame();
return 0;
}

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

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

sceKernelSleepThreadCB();

return 0;
}

int SetupCallbacks(void) {
int thid = 0;

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

return thid;
}
int main() {

pspDebugScreenInit();
SetupCallbacks();
int counter = 0;
int i = 0;
SceCtrlData pad;
printf("Press [X] To Start The Timer");
while(1) {
sceCtrlReadBufferPositive (&pad, 1);
if(pad.Buttons & PSP_CTRL_CROSS) [
break;
}
}
while(1) {
sceCtrlReadBufferPositive (&pad, 1);
if(pad.Buttons & PSP_CTRL_CIRCLE) {
break;
}
pspDebugScreenClear();
printf("Press [O] To Stop The Timer\n");
printf("Counter: %i", counter);
counter++;
for(i=0; i<5; i++) {
sceDisplayWaitVblankStart ();
}
pspDebugScreenClear();
printf("Counter Finished.");
printf("Final Count: %i", counter);

sceKernelSleepThread();
return 0;
}

any ideas?

[Archaemic]

Well...then just open ~/.bashrc with your text editor and type in this as the last two lines:
export PSPDEV=/usr/local/pspdev
export PATH=$PATH:$PSPDEV/bin

[amrcidiot]

it already was
but ithink that no,it's just a script error
could u take a look at it in the post above you last one?

[kuroneko]

4. fprintf(options, "n"); actually puts 2 bytes into the file (strings are null terminated) not 1.

FWIW, while strings are null terminated, fprintf does not write the terminator to the stream. Meaning only 'n' is written.

[FaT3oYCG]

hi i have a couple of problems with my code

problem one is that i know it wont return how i want it too and
problem two is that i dont think it is set out right either

i would like to enter a scan code and then if the scan code is right i.e. it is being pressed make the function return 1 aka true but how would i do this because my code isnt doing it at the moment here is what i have

static int lua_irKeybInit(lua_State *L)
{
	if (lua_gettop(L) != 2) return luaL_error(L, "path, kernel mode");
	const char *path = luaL_checkstring(L, 1);
	int kernel = luaL_checkint(L, 2);
	pspIrKeybInit(path, kernel);
	return 0;
}

static int lua_irKeybGetKey(lua_State *L)
{
	if (lua_gettop(L) != 1) return luaL_error(L, "key");
	int character = luaL_checkint(L, 1);
	
	pspIrKeybOutputMode(PSP_IRKBD_OUTPUT_MODE_SCANCODE);
	unsigned char raw;
	unsigned char buffer[255];
	SIrKeybScanCodeData * scanData;
	int i, length, count;
	pspIrKeybReadinput(buffer, &length);
	count = length / sizeof(SIrKeybScanCodeData);
	for( i=0; i < count; i++ )
	{
		scanData=(SIrKeybScanCodeData*) buffer+i;
		raw = scanData->raw;
		if( raw == character) return 1;
	};
	return 0;
}

static int lua_irKeybFinish(lua_State *L)
{
	pspIrKeybFinish();
	return 0;
}

i highlighted the section im having trouble with in bold

thanks

[Xsjado7]

i aint seein nun highlighted bit

[SuperBatXS]

whats that for some f****d up code ?!

this will do it aswell:

but this is a better coding style:


and please tell me what this is supposed to be:
?!?!
this will in the best case equal to:
o_O

next is:

char array with 7 elements, yet you try to write to the 8th element, note it starts from zero ;)

you sure what you're doing ?
ah and to know what exactly went wrong would be good to know too as I see many possibilities why this doesn't work the way it is meant to be ;)

Alright, first of all, it doesn't work at all. However, the fread and all that works (it reads contents of file and stores it into an array). The problem i was having was with the "switch" part. Also, if i do it the "better coding style" one, it gives me an error that options is uninitialized. Finally, when did i say i wanted to write to the eight element? I want to READ the first element. Notice the "switch" xoptions[0], meaning read the first element and do the following actions. That's the part that i can't get working.

Edit: OMG! I got it working!!! Yes! Lol, it's the stupidest thing that no one could figure out. To Archaemic and tommydanger, thanks for trying to help me out, and thanks Archaemic for helping me learn the switch statements (better than a bunch of else if's). Anyways, here's the full code:

//Open File Once
char xoptions[4];
FILE *options;
if ((options = fopen("./files/options.txt","rb")) == NULL)
{
     printf("Please Check Your Options.txt");
}
xoptions[fread(xoptions, 1, 4, options)] = 0;
fclose(options);
//xoptions[4]=0; -----This Part Was Causing the Problem

//Cpu
switch(xoptions[0]) {
    case 's': cpudisplay = 111; break;
    case 'n': cpudisplay = 222; break;
    case 'f': cpudisplay = 333; break;
    }
CpuPower(cpudisplay, cpudisplay, cpudisplay/2);

[yaustar]

FWIW, while strings are null terminated, fprintf does not write the terminator to the stream. Meaning only 'n' is written.

It doesn't? Opps. In that case, I am not 100% sure what was causing the crash.
-= Double Post =-
@tommydanger: It is a matter of preference checking pointers against NULL rather then using the not operator. I much prefer the checking against NULL because that immediately tells me that the code is checking a pointer. I normally reserve the use of the not operator for bools.

@TMNT: Of course if would cause problems:

char xoptions[4];
xoptions[4]=0;

Take a look at the size of the array and the element you are trying to write to. As tommydanger said, arrays are 0 based which means you were trying to write to the 5th element of the array which is undefined memory and therefore *may* crash or at least give undefined behaviour.

[SuperBatXS]

@TMNT: Of course if would cause problems:

char xoptions[4];
xoptions[4]=0;

Take a look at the size of the array and the element you are trying to write to. As tommydanger said, arrays are 0 based which means you were trying to write to the 5th element of the array which is undefined memory and therefore *may* crash or at least give undefined behaviour.

Exactly. I need to embrace and utilize my knowledge of arrays more. I was so worried at that time that i couldn't solve the more basic problems...
Well, glad that's over. :)
I have already found a way to encrypt my txt files for extra security (already tested and working without problems)!


-Thanks everyone for helping me out! ;)

[FaT3oYCG]

i aint seein nun highlighted bit

this bit

static int lua_irKeybGetKey(lua_State *L)
{
	if (lua_gettop(L) != 1) return luaL_error(L, "key");
	int character = luaL_checkint(L, 1);
	
	pspIrKeybOutputMode(PSP_IRKBD_OUTPUT_MODE_SCANCODE);
	unsigned char raw;
	unsigned char buffer[255];
	SIrKeybScanCodeData * scanData;
	int i, length, count;
	pspIrKeybReadinput(buffer, &length);
	count = length / sizeof(SIrKeybScanCodeData);
	for( i=0; i < count; i++ )
	{
		scanData=(SIrKeybScanCodeData*) buffer+i;
		raw = scanData->raw;
		if( raw == character) return 1;
	};
	return 0;
}

[_dysfunctional]

As for the configuration files, I wrote a configuration parser that someone can use if they want. The configuration file format is '.jpc'. They look like this:

# A Comment
# Another Comment

option "aconfigoption" 'i'
{
7
}

option "aconfigoption2" 's'
{
"seven"
}

It's in C++, but all the i/o is in C, so it should be easy to convert it from a class to something more C worthy.

[BlackShark]

As for the configuration files, I wrote a configuration parser that someone can use if they want. The configuration file format is '.jpc'. They look like this:



It's in C++, but all the i/o is in C, so it should be easy to convert it from a class to something more C worthy.

does this support floats?

[brethren]

that shows up
-= Double Post =-
After i did "make" I get this now:

psp-gcc -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall -D_PSP_FW_VERSION=150 -c -o main.o main.c
main.c: In function ‘main’:
main.c:51: error: expected expression before ‘[’ token
main.c:53: error: expected ‘;’ before ‘}’ token
main.c:46: warning: unused variable ‘i’
main.c:45: warning: unused variable ‘counter’
main.c: At top level:
main.c:55: error: expected identifier or ‘(’ before ‘while’
make: *** [main.o] Error 1

Spoiler for SOURCE:

//w/e- By Amrcidiot

/* random
random
*/

#include <pspkernel.h>
#include <pspdebug.h>
#include <pspdisplay.h>
#include <pspctrl.h>

PSP_MODULE_INFO("Counter" , 0,1,1);
#define printf pspDebugScreenPrintf

int exit_callback(int arg1, int arg2, void *common) {
sceKernelExitGame();
return 0;
}

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

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

sceKernelSleepThreadCB();

return 0;
}

int SetupCallbacks(void) {
int thid = 0;

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

return thid;
}
int main() {

pspDebugScreenInit();
SetupCallbacks();
int counter = 0;
int i = 0;
SceCtrlData pad;
printf("Press [X] To Start The Timer");
while(1) {
sceCtrlReadBufferPositive (&pad, 1);
if(pad.Buttons & PSP_CTRL_CROSS) [ /* whats this [?, looks like a typo */
break;
}
}
while(1) {
sceCtrlReadBufferPositive (&pad, 1);
if(pad.Buttons & PSP_CTRL_CIRCLE) {
break;
}
pspDebugScreenClear();
printf("Press [O] To Stop The Timer\n");
printf("Counter: %i", counter);
counter++;
for(i=0; i<5; i++) {
sceDisplayWaitVblankStart ();
}
pspDebugScreenClear();
printf("Counter Finished.");
printf("Final Count: %i", counter);

sceKernelSleepThread();
return 0;
}

any ideas?

you see how it says

main.c:51: error: expected expression before ‘[’ token

that means check line 51 in file main.c. if you check the spoiler you'll see the problem. After you fix that problem try compiling it again

[_dysfunctional]

does this support floats?

No, but it would more than easy to add them. I wrote it for a mini http server I made, so I had no need for floats, it would work the same as how the integers are loaded, except you would change the fscanf call to load a float, and change the type to 'f'.

[Judas]

No, but it would more than easy to add them. I wrote it for a mini http server I made, so I had no need for floats, it would work the same as how the integers are loaded, except you would change the fscanf call to load a float, and change the type to 'f'.

Could you post the code to that, or send me a copy? I'd like to see it.

[_dysfunctional]

To miniHttp or the configuration loader with floats implemented?

[Judas]

To miniHttp or the configuration loader with floats implemented?

Sorry, but looks like you already posted it. I feel retarded for not noticing it. Nevermind.