C/C++ Programming Help Thread

[HYde]

Ok i've been going over it and over it, looks good but I can't find out whats wrong with the source maybe someone could tell me.

Spoiler for code:

#include <pspkernel.h>
#include <pspdisplay.h>
#include <pspctrl.h>
#include <stdio.h>
#include <psppower.h>

#include "graphics.h"

PSP_MODULE_INFO("Backgrou nd Changer",0,1,1);

#define RGB(r,g,b) ((r) \ ((g)<<8) \ ((b)<<16))

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(void){
scePowerSetClockFrequency (333, 333, 166);
SetupCallbacks();
initGraphics();

SceCtrlData pad;

int i;
int selComponent = 0;
char filler[10];

int bgR = 0;
int bgG = 0;
int bgB = 0;

Color highlightColor = RGB(200, 200, 200);
Color dimmedColor = RGB(100, 100, 100);
Color shadowColorH = RGB(55, 55, 55);
Color shadowColorD = RGB(55, 55, 55);

while(1){
sceCtrlReadBufferPositive (&pad, 1);
if(pad.Buttons & PSP_CTRL_UP){
if(selComponent > 0){
selComponent--;
}
for(i=0; i<10; i++){
sceDisplayWaitVblankStart ();
}
} else if(pad.Buttons & PSP_CTRL_DOWN){
if(selComponent < 2){
selComponent++;
}
for(i=0; i<10; i++){
sceDisplayWaitVblankStart ();
}
}
if(pad.Buttons & PSP_CTRL_RIGHT){
switch(selComponent){
case 0:
bgR++;
break;
case 1:
bgG++;
break;
case 2:
bgB++;
break;
default:
//Should Never Execute
break;
}
}else if(pad.Buttons & PSP_CTRL_LEFT){
switch(selComponent){
case 0:
bgR--;
break;
case 1:
bgG--;
break;
case 2:
bgB--;
break;
default:
//Should Never Execute
break;
}
}

if(bgR < 0){
bgR = 0;
} else if(bgR > 255){
bgR = 255;
}
if(bgG < 0){
bgG = 0;
} else if(bgG > 255){
bgG = 255;
}
if(bgB < 0){
bgB = 0;
} else if(bgB > 255){
bgB = 255;
}
fillScreenRect(RGB(bgR, bgG, bgB), 0, 0, SCREEN_WIDTH, SCREEN_HEIGHT);
sprintf(filler, "RED: %i", bgR);
if(selComponent == 0){
printTextScreen(11, 10, filler, shadowColorH);
printTextScreen(10, 10, filler, highlightColor);
}else{
printTextScreen(11, 10, filler, shadowColorD);
printTextScreen(10, 10, filler, dimmedColor);
}
sprintf(filler, "GREEN: %i", bgG);
if(selComponent == 1){
printTextScreen(11, 20, filler, shadowColorH);
printTextScreen(10, 20, filler, highlightColor);
}else{
printTextScreen(11, 20, filler, shadowColorD);
printTextScreen(10, 20, filler, dimmedColor);
}
sprintf(filler, " BLUE: %i", bgB);
if(selComponent == 2){
printTextScreen(11, 30, filler, shadowColorH);
printTextScreen(10, 30, filler, highlightColor);
}else{
printTextScreen(11, 30, filler, shadowColorD);
printTextScreen(10, 30, filler, dimmedColor);
}
flipScreen();

for(i=0; i<1; i++){
sceDisplayWaitVblankStart ();
}
}
return 0;
}

my compiler output errors are

Spoiler for errors:

Compiler: Default compiler
Executing make...
make.exe -f "makefile" all
psp-gcc -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall -c -o main.o main.c
main.c : In function 'main':
main.c(55) : error: stray '\' in program
main.c(55) : error: called object '200' is not a function
main.c(55) : error: stray '\' in program
main.c(56) : error: stray '\' in program
main.c(56) : error: called object '100' is not a function
main.c(56) : error: stray '\' in program
main.c(57) : error: stray '\' in program
main.c(57) : error: called object '55' is not a function
main.c(57) : error: stray '\' in program
main.c(58) : error: stray '\' in program
main.c(58) : error: called object '55' is not a function
main.c(58) : error: stray '\' in program
main.c(124) : error: stray '\' in program
main.c(124) : error: called object 'bgR' is not a function
main.c(124) : error: stray '\' in program
make: *** [main.o] Error 1
Execution terminated

This is driving me crazy and I'm sure it will turn out to be something simple...I just know it. :Argh:

[adrahil]

#define RGB(r,g,b) ((r) \ ((g)<<8) \ ((b)<<16))

Division bar is in the wrong direction.... =_=''
\ = BACKSLASH -> escape character.
/ = SLASH -> division

[HYde]

lol...you helped me again. Man Im not cut and pasteing but thats the way it is in the tutorial. I cant beleave I didnt think about that because of useing \n with strings and all. GEZZ!

Ok found out it should be pipes (shift+\), I was wondering cause dividing there doesnt make sence.

[hallo007]

how do you read and print the bytes of an file?(print is not a problem;))

find it;)
(here http://www.psp-programming.com/code/...lesize_example)
-= Double Post =-
some warnings

filebrowser/file_browser.c: In function 'checkspace':
filebrowser/file_browser.c:117: warning: passing argument 1 of 'stat' makes poin
ter from integer without a cast
filebrowser/file_browser.c:118: warning: format '%d' expects type 'int', but arg
ument 2 has type 'off_t'
filebrowser/file_browser.c:121: warning: 'return' with a value, in function retu
rning void

the code

void checkspace()
{
	struct stat fileStats;

	if (stat(current_selection, &fileStats) == 0) {
		printf("File size is %d\n", fileStats.st_size);
	}

	return(0);
}

[Waterbottle]

blargh, I made a function to free a linked list, but it keeps crashing..

typedef struct ObjectList {
    Model *m;
    float x, y, z;
    float rx, ry, rz;
    ObjectList *next;
};

void WipeObjectList(ObjectList *p)
{
     if(p == 0) return;
     if(p->next != 0)
          WipeObjectList(p->next);
     free(p);
}

Every "line" of the list have been allocated using malloc. I bet theres some simple reason for it crashing, but I just can't find anything wrong.

[yaustar]

if(p->next != 0)

Most likely this is the probem. When you create a new ObjectList struct, do you assign 'next' NULL or 0?

[hallo007]

how do you read and print the bytes of an file?(print is not a problem;))

find it;)
(here http://www.psp-programming.com/code/...lesize_example)
-= Double Post =-
some warnings

filebrowser/file_browser.c: In function 'checkspace':
filebrowser/file_browser.c:117: warning: passing argument 1 of 'stat' makes poin
ter from integer without a cast
filebrowser/file_browser.c:118: warning: format '%d' expects type 'int', but arg
ument 2 has type 'off_t'
filebrowser/file_browser.c:121: warning: 'return' with a value, in function retu
rning void

the code

void checkspace()
{
	struct stat fileStats;

	if (stat(current_selection, &fileStats) == 0) {
		printf("File size is %d\n", fileStats.st_size);
	}

	return(0);
}

still not fixed:s

[Waterbottle]

if(p->next != 0)

Most likely this is the probem. When you create a new ObjectList struct, do you assign 'next' NULL or 0?

0.

I thought NULL was defined to be 0 though? Maybe I were lied to.

anyway, shortened version of my code for makeing a new list is;

void AddObject2List(ObjectList *p)
{
     if(p->next == 0)
     {
          p->next = (ObjectList*) malloc(sizeof(ObjectList));
          p = p->next;
          p->next = 0;
     }
     else
     {
          AddObject2List(p->next);
     }
}

[yaustar]

I thought NULL was defined to be 0 though? Maybe I were lied to.

Not always, always prefer NULL over 0.

Can you post up some sample code using your list strcut and all the functions that you use. That way I can debug it properly on my machine.

[will1234]

still not fixed:s

void functions dont return anything :)

[hallo007]

yeah i know that warniung ofcourse;)

but the other warnings , any idea?

[yaustar]

void checkspace()
{
	struct stat fileStats;

	if (stat(current_selection, &fileStats) == 0) {
		printf("File size is %d\n", fileStats.st_size);
	}

	return(0);
}

void functions don't need a return value.
You need to type cast fileStats.st_size to an integer.
You have both a struct and a function named exactly the same thing. Very bad design.
stat function's first parameter is expecting a pointer not an integer.

[Waterbottle]

Not always, always prefer NULL over 0.

Can you post up some sample code using your list strcut and all the functions that you use. That way I can debug it properly on my machine.

functions: http://www.freewebs.com/waterbottle123/excode.c

code:
AddObjects2List( 0, 0, 0, 0, 0, -32, 0, 0, 6, Asphalt, rootGround );//add 6 lines to the list.

pspDebugScreenPrintf("%d" , CountList(rootGround)); //prints amount of lines

if(pad.Buttons & PSP_CTRL_START) WipeObjectList(rootGround->next); //crashes

edit: also Asphalt is a Model,

typedef struct {
    Vertextex *o;
    CTGATexture *tex;
    int size;
    int type;
    float sx, sy, sz;
    float maxdist;
} Model;

[yaustar]

#include <stdlib.h>

typedef struct ObjectList {
    float x, y, z;
    float rx, ry, rz;
    ObjectList *next;
};

//Fills a line in an ObjectList.
void AO2L( float x, float y, float z, float rx, float rz, ObjectList *p )
{
     p->x = x;
     p->y = y;
     p->z = z;
     p->rx = rx;
     p->rz = rz;
     p->next = NULL;
}

//Adds new lines to an ObjectList, and fills them.
void AddObjects2List( float sx, float sy, float sz, float dx, float dy, float dz, float rx, float rz, int amt, ObjectList *p )
{
     if(p->next == NULL)
     {
          p->next = (ObjectList*) malloc(sizeof(ObjectList));
          p = p->next;
          AO2L( sx+=dx, sy+=dy, sz+=dz, rx, rz, p );
          amt--;
          if(amt>0)
             AddObjects2List( sx, sy, sz, dx, dy, dz, rx, rz, amt, p );
     }
     else
     {
          AddObjects2List( sx, sy, sz, dx, dy, dz, rx, rz, amt, p->next );
     }
}

void WipeObjectList(ObjectList *p)
{
     if(p == NULL) return;
     if(p->next != NULL)
          WipeObjectList(p->next);
     free(p);
}

int CountList(ObjectList *p)
{
    int counter = 0;
    while(p != NULL)
    {
       counter++;
       p = p->next;
    }
    return counter;
}

int main( )
{
    ObjectList *rootGround = (ObjectList*) malloc(sizeof(ObjectList));
    rootGround->next = NULL;
    AddObjects2List( 0, 0, 0, 0, 0, -32, 0, 0, 6, rootGround );
    WipeObjectList(rootGround ->next);
    return 0;
}

Works fine for me. No crashes.

[Waterbottle]

Works fine for me. No crashes.

Weird.. :/

[psphacker12.]

How to copy a file ?

[yaustar]

How to copy a file ?

You google:
http://www.google.co.uk/search?q=fop...en-US:official

First hit:
http://www.macdonald.egate.net/CompSci/hfileio.html

[psphacker12.]

thx yaustar

[SG57]

psp - The time it took you to type up and post that question, then waiting, could have been spent implementing the file copying after a quick google... Try it next time ;) Its much faster and doesnt make you look like you're depending on others (hint)

[hallo007]

how do you write your own files to flash1?? i can only write teh registery files and i want to flash a mp3 to it
evertime i try it loads the mp3 but dont flash it:s

any sugestions?

[SG57]

You write correctly using 3rd grade punctuation and spelling skills...

Consult Art for a working answer...

[SodR]

how do you write your own files to flash1?? i can only write teh registery files and i want to flash a mp3 to it
evertime i try it loads the mp3 but dont flash it:s

any sugestions?

You probably will have to mount flash1 like flash0.

[1337PSPer]

is there a way i can get my psp to act like x is being pressed when i press select & note
something like
if (pad_data.Buttons & PSP_CTRL_SELECT & PSP_CTRL_NOTE){
PSP_CTRL_CROSS
}

[Insert_Witty_Name]

Not without hooking some functions.

Maybe if you explained exactly what you are trying to achieve we could offer an alternative idea.

[1337PSPer]

basicly say one of your psp buttons stoped working this could be used to make a 2 buttons pressed together do what that button did befor.
-= Double Post =-
would this code be able to help with hooking
http://0okm.blogspot.com/2006/11/psp...-released.html

[Insert_Witty_Name]

Yes. There's always RemaPSP as an alternative too.

[hallo007]

You probably will have to mount flash1 like flash0.

i did

[Moca]

i did

Spoiler for Copy a file to flash1:

u8 dataOut[2000000] __attribute__((aligned(64 )));
int copy_file(char *src, char *dst)
{

SceUID infd = sceIoOpen(src, PSP_O_RDONLY, 0777);
SceUID outfd = sceIoOpen(dst, PSP_O_WRONLY | PSP_O_CREAT | PSP_O_TRUNC, 0777);
int bytesread;



while ((bytesread = sceIoRead(infd, dataOut, 8192)) > 0)
{
sceIoWrite(outfd, dataOut, bytesread);
}

sceIoClose(infd);
sceIoClose(outfd);
sceIoRemove(src); //Remove this if you want :P
return 0;
}
///////////////////////////////////////////////////////////////////////////

void Flash1Assign()
{

if (sceIoUnassign("flash1:") < 0)
{
printf("!Error unassigning flash1.\n");
}


if (sceIoAssign("flash1:", "lflash0:0,1", "flashfat1:", IOASSIGN_RDWR, NULL, 0) < 0)
{
printf("!Error re-assigning flash1.\n");
}

}
//////////////////////////////////////////////////////////
//Good Stuff. Main();.
int main(int argc, char *argv[])
{


pspDebugScreenInit();
pspDebugScreenClear();
Flash1Assign();
copy_file("ms0:/music.mp3", "flash1:/music.mp3");
printf("done! :)");
return 0;
}

[HYde]

Some of you may know that in some Compiler IDE's, you have to tell the program your writing to wait for you. So that you can see your output.
With C I use getchar(); "mainly for simple programs, or just in the develpoment process" What I have here is two simple programs, the first one everyone knows.

Spoiler for Example :: Hello World:

#include <stdio.h>

main()
{
printf("Hello World!\n");

getchar(); // To pause the console

return 0;
}

Getting to my point and question
If I compile and run Hello World it paused and waited for me to hit a key. My second example I did.

Spoiler for Example :: Multiply two numbers:

#include <stdio.h>

int a, b, c;

int product(int x, int y);

int main()
{
// Input the first numbers
printf("Enter a number between 1 and 100: ");
scanf("%d", &a);

// Input the second number
printf("\nEnter another number between 1 and 100: ");
scanf("%d", &b);

// Calculate and display the product
c = product (a, b);
printf("\n%d times %d = %d\n", a, b ,c);

// Keep console open to see result
getchar();

return 0;
}

/* Function returns the product of its two arguments */
int product(int x, int y)
{
return (x * y);
}

When I go to run it I will enter my two numbers, but when I get the output. The console closes before I can see it. This has been bothering me all day. With no answers from goggle ...so far! I know some of you may say just to use Visual C++ or something of that nature, and it will pause it for me. Thats all good! What I have been doing lately is going through some different IDE's. Especially for use with Cygwin for PSP development. "Plus scrapping some of the rust off thats collected on my programming knowledge"

Maybe thats just it and I'm not seeing the obvious. Maybe someone can put my mind to ease. And I hope this wasn't a waste of time. Sorry if it was, I do need some sleep! :Argh:

[yaustar]

Honestly, I would just use another scanf instead of getchar.

I be guessing you are using DevCpp for the IDE, I personally prefer Code::Blocks myself.