C/C++ Programming Help Thread

[bosshunter]

Ok, so I'm trying to find a string in a txt file and add a new line after it.
Here's a part of the code, but it's not working how it should.. It adds the RplcText to the end of the file instead of replacing the SrchText..

test.txt file:
123
abc
def
789

What am I doing wrong?

FILE *fg;
int i=0,len_string;
char SrchText[]="abc"; 
char RplcText[]="acb\n456";
char tmp[20];
fg=fopen("test.txt","a+");
rewind(fg);
if(fg==NULL)
{
    printf("Error openning the file.");
    exit(0);
}
len_string=strlen(SrchText);
while(1)
{
    for(i=0;i<len_string;i++) tmp[i]=fgetc(fg);
    tmp[i+1]=NULL;
    if(stricmp(SrchText,tmp)==0)
    {
        fprintf(fg,"%s ",RplcText);
        fclose(fg);
        exit(1);
    }
    fseek(fg,-(len_string-1),1);
}
fclose(fg);

[_df_]

you basically need to read the entire file into memory in a linked list say, and insert the line and write it all back to disk. binary files are absolute, there is no easy way to just insert text right in the middle, you need to move everything that comes after it down.

[lilmnm]

i don't get it. all i want to do is load a prx. i don't even know HOW to define what prx i want to load.

you put LoadStartModule("ThePathT oThePRX/ThePrxNameHere.prx");
and it should load it

[mootjeuh]

i've already said that my psp crashes when i try to use that function, isn't there another one?

[bosshunter]

you basically need to read the entire file into memory in a linked list say, and insert the line and write it all back to disk. binary files are absolute, there is no easy way to just insert text right in the middle, you need to move everything that comes after it down.

Is there any tutorial on how to do this?
Can't find one with good examples..

[Davee]

i've already said that my psp crashes when i try to use that function, isn't there another one?

What error?

[mootjeuh]

What error?

it just crashes, no error. although when i run my prx through iR Shell, it works just fine.




what are the table functions in C/C++ ?
for example, what's table.getn (lua) in C/C++ ?

[yaustar]

what are the table functions in C/C++ ?
for example, what's table.getn (lua) in C/C++ ?

There are no tables in C or C++.

[mootjeuh]

wow, i feel :humped:
what if i want to create a ms browser? i know that in Lua, you have to use the table.getn function...

[yaustar]

what if i want to create a ms browser? i know that in Lua, you have to use the table.getn function...

You use C or C++ data structures and types. The general logic will be same.

[bosshunter]

you basically need to read the entire file into memory in a linked list say, and insert the line and write it all back to disk. binary files are absolute, there is no easy way to just insert text right in the middle, you need to move everything that comes after it down.

Ok I got it working.. Had to make it with 2 files. Thanks for your help anyway. Here's the code.

FILE *fg, *fn;
int i=0,len_string;
char SrchText[]="abc"; 
char RplcText[]="acb\n456";
char tmp[20];
fg=fopen("test.txt","a+");
fn=fopen("test1.txt","w");
rewind(fg);
if(fg==NULL)
{
    printf("Error openning the file.");
    exit(0);
}
len_string=strlen(SrchText);

while(!feof(fg))
{
    for(i=0;i<len_string;i++) temp[i]=fgetc(fg);

    if(strcmp(SrchText, temp) == 0)
        fprintf(fn, "%s", RplcText);

    else
        fprintf(fn, "%s", temp);
}
fclose(fp);
fclose(fn);

[lilmnm]

Spoiler for LoadStartModule:

int LoadStartModule(char *path)
{
u32 loadResult;
u32 startResult;
int status;

loadResult = sceKernelLoadModule(path, 0, NULL);
if (loadResult & 0x80000000)
return -1;
else
startResult =
sceKernelStartModule(load Result, 0, NULL, &status, NULL);

if (loadResult != startResult)
return -2;

return 0;
}

^^^^^^^ in there you dont have the prx being called to for it to be started up/activated

The LoadStartModule(char *path) means Load and Start The Module(" At this exact location and here is the path to it ")

and also with that code you normally would have to have starting and ending brackets ( {starting }Ending) for the if and else functions .-.

Spoiler for LoadStartModule New Code:

int LoadStartModule(char *path)
{
u32 loadResult;
u32 startResult;
int status;

loadResult = sceKernelLoadModule(path, 0, NULL);
if (loadResult & 0x80000000)
{
return -1;
}
else
{
startResult = sceKernelStartModule(load Result, 0, NULL, &status, NULL);
}

if (loadResult != startResult)
{
return -2;
}
return 0;
}

what compiler are you using cause it should have given you an error saying it was expecting a '}' before the 'else' statement

[slicer4ever]

^^^^^^^ in there you dont have the prx being called to for it to be started up/activated

The LoadStartModule(char *path) means Load and Start The Module(" At this exact location and here is the path to it ")

and also with that code you normally would have to have starting and ending brackets ( {starting }Ending) for the if and else functions .-.

Spoiler for LoadStartModule New Code:

int LoadStartModule(char *path)
{
u32 loadResult;
u32 startResult;
int status;

loadResult = sceKernelLoadModule(path, 0, NULL);
if (loadResult & 0x80000000)
{
return -1;
}
else
{
startResult = sceKernelStartModule(load Result, 0, NULL, &status, NULL);
}

if (loadResult != startResult)
{
return -2;
}
return 0;
}

what compiler are you using cause it should have given you an error saying it was expecting a '}' before the 'else' statement

no, what he did is perfectly legal:

if(a) 
   b=a;
//^^legal

if(a) 
   b=a; 
   a=b; 
//^^^not legal(well it is, but a=b isn't incompassed inside the if statement's field of scope)

if(a){
   b=a;
   a=b;
}
//^^legal

[mootjeuh]

don't you think I know how to use that function?? I use

LoadStartModule("ms0:/module.prx");

but it just doesn't wanna work. even when i compile the sample that comes with the PSPSDK. maybe it's the compiler? i'm using minPSPw

[Davee]

it just crashes, no error. although when i run my prx through iR Shell, it works just fine.




what are the table functions in C/C++ ?
for example, what's table.getn (lua) in C/C++ ?

Use a debugger like PSPLink then.

[Predricted]

google = MinPSPW

and then?

[lilmnm]

don't you think I know how to use that function?? I use

LoadStartModule("ms0:/module.prx");

but it just doesn't wanna work. even when i compile the sample that comes with the PSPSDK. maybe it's the compiler? i'm using minPSPw

that may be it i use cygwin on my desktop and ubuntu on my laptop but in that past i used CSP 3.1, but i have never heard of that minPSPw .-.

[mootjeuh]

Okay, new question. I'm trying to make a prx that will print with intraFont and blit an image into the XMB. Am I allowed to use libs in kernel PRXs ?

[slasher101]

look at blit.c examples included in intraFont and the sdk samples

[mootjeuh]

where do I get the blit.c file from ?

EDIT:
I've read that VSHBlitter helps me with blitting images into the XMB. But I can't seem to find a download link. Does anyone know where it can be found ?

[slicer4ever]

look at blit.c examples included in intraFont and the sdk samples

as for the vshblitter, idk, google's your best bet

[mootjeuh]

I've been google-ing it since yesterday but without any luck. The link given here doesn't even work.

[lilmnm]

I've been google-ing it since yesterday but without any luck. The link given here doesn't even work.

i think i have seen that on this forum try searching i know its here somewhere

[logank9]

does anyone know of how to simply draw pixels in PSPSDK?

I just need to create a simple function like drawpx(x,y,r,g,b)

thanks

[slasher101]

pspgu, check the sdk samples

[logank9]

alright, I've have been looking through them for the last half hour and can't find anything useful. can I have a hint? :)

[logank9]

could you atleast give me the function name? :Argh:

[slicer4ever]

logan, it's not just a function, you need to setup the GU drawing buffer, than set it to ortho(or use GU_TRANSFORM_2D(been a while don't remeber if that's correct)), than draw with GU_POINTS(i believe it's GU_POINTS), it's quite simple, just take some time to look around, alternatively, you could use oslib(or any of the other graphic api's) if you don't feel like learning how to setup the gu for drawing.

[mootjeuh]

since I still haven't figured out on how to blit images into the XMB, does someone know how to draw a filled rectangle to the screen? I mean, without using any libs.

[FaT3oYCG]

ok, im dabbling in C a bit more now and i have a bit of a silly problem. I want to check if there is a UMD disk in the drive on my slim psp but the function always returns that there is no matter what.

here is my code:

#include <oslib/oslib.h>
#include <pspumd.h>

PSP_MODULE_INFO("Testing", 0, 1, 0);
PSP_MAIN_THREAD_ATTR(THREAD_ATTR_USER | THREAD_ATTR_VFPU);

int main()
{
    oslInit(0);
    oslInitGfx(OSL_PF_8888, 1);
    oslInitConsole();

    while (!osl_quit)
    {
        oslStartDrawing();
        oslCls();

        oslReadKeys();

	int umdDetectedVariable;
	umdDetectedVariable = sceUmdCheckMedium();

	if (umdDetectedVariable == 0)
	{
		oslPrintf_xy(20, 240, "No UMD disc is inserted.");
	} else {
		oslPrintf_xy(20, 240, "UMD disc is inserted.");
	}


        if (osl_keys->held.hold)
	{
		oslPrintf_xy(20, 250, "Hold Activated!");
	}
        if (osl_keys->pressed.start)
	{
		break;
	}

        oslEndDrawing();
        oslSyncFrame();
    }

    oslEndGfx();
    oslQuit();

    return 0;
}

im running in user mode dont know if that affects anything? although i would think that the umd would be in user mode. oh and yes i have included the lib in my makefile.

Thanks for any help, its probably something simple.