PSP File I/O Functions

[tommydanger]

I'm pretty sure you could also used the default C File I/O functions. I changed the title to specify that it is file i/o, not gamepad i/o.

are you sure?
that would be pretty sweet, cause i'm a lot more familiar with these, and int sceIoRead(SceUID fd, void *data, SceSize size); cannot be used to read line by line, it ignores the CR
well I think I have to write my one function

[Mianvro]

Maybe you could try and see whether he is right or wrong

The standard printf for example doesn't work on the PSP.



Btw, I think you should add a note to the TS with the header to include in order to be able to use this function.
Saves a handful of questions about them.

Code:

#include "pspiofilemgr.h"

[Feldor]

nathan42100 wrote:
I'm pretty sure you could also used the default C File I/O functions. I changed the title to specify that it is file i/o, not gamepad i/o.

are you sure?
that would be pretty sweet, cause i'm a lot more familiar with these, and int sceIoRead(SceUID fd, void *data, SceSize size); cannot be used to read line by line, it ignores the CR
well I think I have to write my one function

Well you could alwasy make a new function that reads the line.. its not THAT hard to do so..

Maybe you could try and see whether he is right or wrong Smile

The standard printf for example doesn't work on the PSP.



Btw, I think you should add a note to the TS with the header to include in order to be able to use this function.
Saves a handful of questions about them.

Code:
#include "pspiofilemgr.h"

Haha, good point, Ill add it.

[tommydanger]

ok so here is the function:

Code:

//read a txt line
int psp_fgets(char *s,int size, SceUID *fd)
{
  int bytesread=0;
  int offset=0;
  int i=0;
  int bufferlen=0;
 
  bytesread = sceIoRead(fd, s, size);//Get the txt data
  if(!bytesread)
  return -1;
 
  bufferlen=strlen(s);
  for(i=0;i<bufferlen;i++)
  {
    if(s[i]=13)//Check if it's a CR, if so skip the rest by adding a null terminating char
    {
      s[i] = 0x00;
      break;
    }
  }
 
  offset = bytesread-i;
  sceIoLseek(fd, -offset, SEEK_CUR);//Set the filepointer to the start of the new line
  return 1;
}

cannot test it right now, cause i'm not at home right now, but should work

[jsharrad]

anyone know if there's any advantage to using these functions over fread/fwrite?

[nathan42100]

anyone know if there's any advantage to using these functions over fread/fwrite?

It has psp somewere in the function

[Feldor]

Using these commands is better only because its made by the pspsdk so its not going to do something that the psp wont like, using the fread/fwrite is geared towards c in general and isnt specific only on PSP

ITs really up to you.

[corpdecker]

Regarding the "mode" tests.. if you are saving to a file on ms0, it will ignore the mode because it's a FAT32 filesystem.. which if I recall correctly can't remember or handle ownership or file modes like ext2/ext3/reiserfs/ntfs, etc.
Not sure about flash0/1 ?

[Waterbottle]

Whenever I'm using SceIoWrite/SceIoRead it seems like it has a sceKernelDelayThread() (or something) running regulary, becouse basically I'm having a prx and running it together with a game and the game runs at normal speed while it's writing/reading.

How could I disable this so the game gets completly frozen until the writing/reading is done?

[&#1057;&#1059;&am]

You would need to get the thread ID of the "game" and use something like sceKernelSuspendThread() to put it on hold.

[Waterbottle]

Any tips on how to find the game's thread ID? the game is an umd ran with devhook if it matters..

[&#1057;&#1059;&am]

I'd imagine you'd use sceKernelGetThreadmanIdList() with SCE_KERNEL_TMID_Thread  as the type to enumerate system threads.  Then step through the results using sceKernelReferThreadStatus() until you find the one you want by name or some other identifier.

[macthefork]

mode isn't completly useless, for example if you set it to 0 then you cannot create new files on the memory stick. Of course if you use psplink on a linux system then the mode actually matters and will be reflected on the host files you create which in part is probably why it is there as the basic official kit runs on cygwin or linux machines.

Oh and printf does work, you just need something which actually handles the resulting output *cough* psplink *cough*