C/C++ Programming Help Thread

[malliet]

You need to setup your enviroment variables before you start installing.

I don't understand that. Can you explain it?

EDIT: Please don't tell me Cygwin and PSPtoolchain don't work on Vista, because I run Vista. Is Vista the problem?

[slicer4ever]

cygwin runs perfectly fine on vista

as for environment variables, see the toolchain readme

[malliet]

Oke. Thanks for the answer, I will try it out again;)

[Art]

Hi Guys,
Looking for a simple example of collision detection in GU.
(ie. pixel resolution collision detection between two objects or finding the colour of a pixel at given coordinates).
Thanks, Art.

[Xsjado7]

It's 3.15, I'm tired and this code doesn't seem to be working.

for(fileCompare = 0; fileCompare < fileCount; fileCompare ++)
    {
		sceIoDread(dirId, &dirent);
		sprintf(musicFiles[fileCompare].filename, dirent.d_name);
		musicFiles[fileCompare].ID = fileCompare;
	}

I'm reading the contents of ms0:/MUSIC/. fileCount is the amount of files in the folder. The musicFiles struct holds filename and ID, nothing else. It reads fine, without crashing, when I display the filenames that are stored afterwards, they all show up the same eg. all filenames are the same file. Help would be awesome, I'm gonna go sleep...

Edit: Fixed. Stupid error on my behalf

[Lukeson]

Hi,

this is the first time I try to compile a C++ program, before that I only did C (for 1.5 kernel), and now I have troubles; When I compile I get an error saying

main.cpp (24) : error: expected unqualified-id before 'asm'

Line 24 is PSP_MODULE_INFO("pspProje ct", PSP_MODULE_USER, 1, 1);

before that I include a file "Renderer.h", if I don't the error does not occur. Renderer.h is pretty simple:

class Renderer {

public:
	void render_screen();
	void flip_screen();

	void remove_layer(int layer_id);
	void flush_layers();
}

So I guess the error must be found somewhere else, but I have no idea where. Maybe in the Makefile?

Spoiler for Makefile:

TARGET = pspProject
OBJS = main.o callback.o

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

LIBDIR =
LDFLAGS =
LIBS = -lstdc++

EXTRA_TARGETS = EBOOT.PBP
PSP_EBOOT_TITLE = psp Project

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

Thanks for all answers

Luke

[_df_]

you lack trailing semi colon to close the class off.

[Lukeson]

-_-

too much java lately *dies*

Thank you!

[Lukeson]

Ok, more noob-questions, sorry for that;

I'm trying to create a simple list with the stl, but I get the error

Renderer.h (12) : error: ISO C++ forbids declaration of 'list' with no type

Code is simple:

#include <list>

#include "GuiObject.h"

class Renderer {

private:
	list<GuiObject> gui_objects;     // <= Line 12

// other code

};

I can cut out the #include <list> and get the same messages, somehow this doesn't seem to be recognized.

Sorry for noobing around

Luke

[_dysfunctional]

The STL type list is under the namespace std, so if you want to use it you can do one of the following things:

using namespace std;
...
list<SomeType> myList;

or

std::list<SomeType> myList;

[Lukeson]

thx!

[Mr305]

Suddenly I was wondering if,

char *text;
//malloc blah blah

Are these both interchangeable?

Can we use either of these?

text[5];
*(text+5) (or is Only this valid?)

[pspersanonymous]

Suddenly I was wondering if,

char *text;
//malloc blah blah

Are these both interchangeable?

Can we use either of these?

text[5];
*(text+5) (or is Only this valid?)

Yes both

text[5];

and

*(text+5);

will work.

Of course, you could've just tested it.

[Mr305]

Yes both

text[5];

and

*(text+5);

will work.

Of course, you could've just tested it.

I test everything; but wanted to confirm this basic thing :)

[BlackBurd]

just a question but did the allegro engine get ported to the psp http://www.allegro.cc

made game making in c alot more easy.

[eldiablov]

To my knowledge it hasnt been ported. It should be portable though as it is a wrapper for SDL.

[_df_]

allegro has nothing to do with sdl. it does not wrap sdl.

my understanding is that it has already been ported by diedel (check ps2dev.org)
see here http://diedel.blogcindario.com/

[Auraomega]

I've started compiling some stuff I've made recently, but I've come across some issues.

First, when I tried compiling freetype it gives me an error with toolize, I've searched Google but can't find anything of use. I'm on Ubuntu Fiesty.

Second, I've written a module and the exports, but I'm getting a warning "cannot find entry symbol module_start; defaulting to 0000...."

Spoiler for Src, export, makefile:

#include <pspkernel.h>
#include <stdio.h>
#include <string.h>

#include "depack.h"

PSP_MODULE_INFO("PBP_DEPACK", 0x0, 1, 0);
PSP_MAIN_THREAD_ATTR(0);

void getOffsets(FILE* pbp, int position, long int* pointerStart, long int* pointerEnd)
{
	...
}

int module_start(SceSize args, void *argp)
{
	...
}

int module_stop(void)
{
	...
}

# Define the exports for the prx
PSP_BEGIN_EXPORTS

# These four lines are mandatory (although you can add other functions like module_stop)
# syslib is a psynonym for the single mandatory export.
PSP_EXPORT_START(syslib, 0, 0x8000)
PSP_EXPORT_FUNC_HASH(module_start)
PSP_EXPORT_VAR_HASH(module_info)
PSP_EXPORT_END

PSP_EXPORT_START(PBP_DEPACK_EXP, 0, 0x4001)
PSP_EXPORT_FUNC(getOffsets)
PSP_EXPORT_END

PSP_END_EXPORTS

TARGET = PBP_Depack
OBJS = depack.o 

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

BUILD_PRX = 1
PRX_EXPORTS = exports.exp

USE_KERNEL_LIBC=0
USE_KERNEL_LIBS=0

LIBDIR =
LDFLAGS = -mno-crt0 -nostartfiles
LIBS = -lstdc++ -lpspkernel


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

Third - solved

Finally, I today updated to 5.00 after being on 3.52 forever, I was wondering if there was still the development libraries to take advantage of M33 available like on the older cfws?

Sorry for the long winded post, but I can't find any answers elsewhere.
-Aura

[Lukeson]

How do I find out wether or not a given filename (respectively path) is a folder or not? I found out for Linux there's S_ISDIR, but I can't figure out how to use it -_-. Does anyone have a good link or something?

[_df_]

its called 'stat'.

int stat(char *path, struct stat *buf);

then call S_ISDIR on the st_mode entry from the stat buffer...

[ultimate-psp]

Hi there,

is there any way to downscale a png image while using graphics.h.
found this function Image* imageThumbnail(Image* inImage) in another graphic.s c by flatmush. Did anybody ever used this function?


Need to downscale some png images around 30%.


Thanks in advance.

[RupertAvery]

:/

[Lukeson]

its called 'stat'.

int stat(char *path, struct stat *buf);

then call S_ISDIR on the st_mode entry from the stat buffer...

Thanks a lot, _df_ ! :)

[MoAShaun]

I keep on getting errors with the SCEMP3 sample from the SDK. I keep on getting the loading music error (yes, the directory and everything is in the right spot). Does anyone have a working SCEMP3 sample (or something similar)

[Xsjado7]

If your getting an error at sceMp3Init( handle ) then your MP3 most likely has ID3 tag which sceMp3 cannot parse. You have to find your own way around it then pass the data back

[slasher101]

hi,
im currently making a app for psp

i need to know how to get the Mobo info,
also i cant blit a background brhind text.

Thx in advncd :Punk:

[Xsjado7]

hi,
im currently making a app for psp

i need to know how to get the Mobo info,
also i cant blit a background brhind text.

Thx in advncd :Punk:

http://www.psp-programming.com/tutorials/c/lesson04.htm

[jsharrad]

I keep on getting errors with the SCEMP3 sample from the SDK. I keep on getting the loading music error (yes, the directory and everything is in the right spot). Does anyone have a working SCEMP3 sample (or something similar)

Make sure you're using a later kernel... think the sdk sample only works with 3.71+.

[slasher101]

yea thx guys i fixed the prob with the blit!! :Jump:

i still need to get the MotherBoard info plz.

Also i need to read a key from IdStorage

int ReadKey(int key, char *buffer) 
{ 
        int err; 
        u32 k1; 

        k1 = pspSdkSetK1(0); 

        memset(buffer, 0, 512); 
        err = sceIdStorageReadLeaf(key, buffer); 

        pspSdkSetK1(k1); 

        return err; 
}

but my compiler returns:

main.c:(.text+0x120): undefined reference to `sceIdStorageReadLeaf'

plz help, thx in advncd :Punk:

--EDIT--
The code is also a prx because if im not mistaken this code has to be run in kernel mode right?

[Xsjado7]

Your missing a lib from you makefile. Not sure which one though

Edit:
Try - lpspidstorage