coding/programming help..

[psphacker12.]

In C, how do you clear the screen, define RGB, and display the current dir?

[lord pip]

pspDebugScreenClear();

if your using the normal debug txt.
and to display your current file structure???? i dont know

[Slasher]

By 'clearing the screen' it depends how you setup your framebuffer, etc. If you're just using the default graphics.c/h then it would be flipScreen(); , or perhaps clearScreen(0);

#define RGB(r, g, b) (0xFF000000 | ((b)<<16) | ((g)<<8) | (r))

http://slasher.team-duck.com then scroll down to filebrowser?
Or if you mean just getting the current dir, it would be

char path[255];
getcwd(path, 255);

[psphacker12.]

Originally Posted by Slasher

By 'clearing the screen' it depends how you setup your framebuffer, etc. If you're just using the default graphics.c/h then it would be flipScreen(); , or perhaps clearScreen(0);

#define RGB(r, g, b) (0xFF000000 | ((b)<<16) | ((g)<<8) | (r))

http://slasher.team-duck.com then scroll down to filebrowser?

thanks guys I wanted to know how to define RGB so i could change the color of my text LOL
-= Double Post =-
how do you define a null variable??

[Bronx]

bool variable = NULL;

I believe that would work, but I always get confused with the bools and NULL and nil and flase and true

[yaustar]

You can't define a NULL variable (not in the literal sense). You can initialise the base datatypes (int, float, double, bool, etc) to 0 or a default value of your choosing. You can NULL a pointer so that it points to 'nothing' by:

int * pOddVariableName = NULL; // pointer is now NULLed
pOddVariableName = NULL; // Or can assign the value to an existing pointer

NULL is normally #define as 0 in one of the common header files that you can include that comes with the compiler. Bear in mind this well NOT free memeory in the same way as Lua. Lua has 'garbarge collection' (keyword, google it) where as C/C++ does not.

// Let's see if I can remember some C
int * pNumber = malloc( sizeof(int) ); // Allocated 4 bytes on the heap
*pNumber = 10; // Given it a value for the hell of it
pNumber = NULL; // Does not free the memory on the heap
*pNumbr = 13; // Runtime NULL exception error. Tried to give a value to 'nothing'

// Let's see if I can remember some C
int * pNumber = malloc( sizeof(int) ); // Allocated 4 bytes on the heap
*pNumber = 10; // Given it a value for the hell of it
free( pNumber ); // Freed the memory on the heap
*pNumber = 13; // Runtime exception error because the memory that the pointer was pointing to is now free so the program can't assign the value
pNumber = NULL; // Always NULL your pointers when you free them. Bugs are a lot easier to track this way.

[psphacker12.]

how do you change the text color with RGB??
I know you use,

pspDebugSetTextColor();

but how do you use RGB text?

[SG57]

psphacker12 - Plesae use the appropraite thread for this. Also, there are plenty of converters out there... The links on the bottom of this site give you lots of resources...

http://www.colortools.net/article_web_colors.html

[lord pip]

http://www.psp-programming.com/tutorials/c/lesson05.htm

this little sample will doo all the colours you want.
with all the txt and background colours you want.

[psphacker12.]

I'm trying to compile this..

Spoiler for Code:

#include <pspdisplay.h>
#include <pspgu.h>
#include <pspkernel.h>
#include <pspctrl.h>
#include <pspdebug.h>
#include <stdlib.h>
#include <stdio.h>
#include "graphics.h"
#define printf pspDebugScreenPrintf
#define dprint pspDebugScreenPrintf
PSP_MODULE_INFO("???", 0, 1, 1);

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);
          sceKernelRegisterExitCallback(cbid);

          sceKernelSleepThreadCB();

          return 0;
}

int SetupCallbacks(void) {
          int thid = 0;

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

          return thid;
}

int main(void)  {
          pspDebugScreenInit();
          SetupCallbacks();
          SceCtrlData pad;
          initGraphics();
          sceCtrlSetSamplingCycle(0);
          sceCtrlPeekBufferPositive(&pad, 1);
while (1)  {
          char buffer[200]
          int rand() {
            bool rn0 = 0;
            if (pad.Buttons != 0){
              if(pad.Buttons & PSP_CTRL_CROSS) {
                rn0=rand()%10000;
              }
            }
          if (rn0 != 0) {
            pspDebugScreenPrintf("Press 'X' to start.",);
          }
          pspDebugScreenSetXY(0, 2);
          pspDebugScreenClear();
          fillScreenRect(RGB(255, 0, 0), 0, 0, 480, 272);
          pspDebugScreenSetTextColor(0x00000000);
          pspDebugScreenPrintf("Generated Integer:%d",rn0);
          }
          sceDisplayWaitVblankStart();
          sceKernelSleepThread();
          }
return 1;
}

and I get these errors,

Spoiler for Errors:

Dave@PREFERRE-FA8B50 ~
$ cd /pspdev

Dave@PREFERRE-FA8B50 /pspdev
$ make
psp-gcc -I. -I/usr/psp/sdk/include -O2 -G0 -Wall   -c -o main.o main.c
main.c : In function 'main':
main.c(49) : error: syntax error before 'bool'
main.c(52) : error: 'rn0' undeclared (first use in this function)
main.c(52) : error: (Each undeclared identifier is reported only once
main.c(52) : error: for each function it appears in.)
main.c(56) : error: syntax error before ')' token
make: *** [main.o] Error 1

Dave@PREFERRE-FA8B50 /pspdev
$

[Access_Denied]

Well, I just took a quick look at your error, and it amazes me you couldn't figure out that last one. It says error before ')' in line 56. Go to line 56 and you'll notice that you put this:

",);

Take out the comma. I don't know how you couldn't figure that one out.

[psphacker12.]

Originally Posted by ARza

Well, I just took a quick look at your error, and it amazes me you couldn't figure out that last one. It says error before ')' in line 56. Go to line 56 and you'll notice that you put this:

",);

Take out the comma. I don't know how you couldn't figure that one out.

I know but even after I fixed that error but even after that error it gives me this

Dave@PREFERRE-FA8B50 ~
$ cd /pspdev

Dave@PREFERRE-FA8B50 /pspdev
$ make
psp-gcc -I. -I/usr/psp/sdk/include -O2 -G0 -Wall   -c -o main.o main.c
main.c : In function 'main':
main.c(48) : error: syntax error before 'bool'
main.c : In function 'rand':
main.c(52) : error: 'rn0' undeclared (first use in this function)
main.c(52) : error: (Each undeclared identifier is reported only once
main.c(52) : error: for each function it appears in.)
main.c : In function 'main':
main.c(67) : error: syntax error at end of input
make: *** [main.o] Error 1

Dave@PREFERRE-FA8B50 /pspdev
$

[hartraft]

Originally Posted by psphacker12.

I'm trying to compile this..

while (1)  {
          char buffer[200]
          int rand() {
            bool rn0 = 0;
            if (pad.Buttons != 0){
              if(pad.Buttons & PSP_CTRL_CROSS) {
                rn0=rand()%10000;
              }
            }
          if (rn0 != 0) {
            pspDebugScreenPrintf("Press 'X' to start.",);
          }
          pspDebugScreenSetXY(0, 2);
          pspDebugScreenClear();
          fillScreenRect(RGB(255, 0, 0), 0, 0, 480, 272);
          pspDebugScreenSetTextColor(0x00000000);
          pspDebugScreenPrintf("Generated Integer:%d",rn0);
          }
          sceDisplayWaitVblankStart();
          sceKernelSleepThread();
          }
return 1;
}

and I get these errors,

Dave@PREFERRE-FA8B50 ~
$ cd /pspdev

Dave@PREFERRE-FA8B50 /pspdev
$ make
psp-gcc -I. -I/usr/psp/sdk/include -O2 -G0 -Wall   -c -o main.o main.c
main.c : In function 'main':
main.c(49) : error: syntax error before 'bool'
main.c(52) : error: 'rn0' undeclared (first use in this function)
main.c(52) : error: (Each undeclared identifier is reported only once
main.c(52) : error: for each function it appears in.)
main.c(56) : error: syntax error before ')' token
make: *** [main.o] Error 1

Dave@PREFERRE-FA8B50 /pspdev
$

int rand() { ... } is a function declaration.
remove that line and the braces and probably would be a good idea to have rn0 as
int rn0 = 0;

You could also probably remove the if statement for if pad.Buttons is pressed as it is handled with the next if statement

while (1)  {
          char buffer[200]
          int rn0 = 0;
          if(pad.Buttons & PSP_CTRL_CROSS) {
              rn0=rand()%10000;
          }
          if (rn0 != 0) {
            pspDebugScreenPrintf("Press 'X' to start.",);
          }

[Moonchild]

There is no such thing as a bool datatype in C, you either have to use BOOL (which really just is an int) or int.