C/C++ Programming Help Thread

Zitat:

---

Zitat von Moca

You mean with an image...? Not "with OSLib". Anyway, bin2c just converts each byte in a file into it's hexadecimal equivalent and sticks it in an array.

Just include the header containing the buffer so that you can use it in your code. The array is loaded into memory, so be wary of how big the array you are loading is.

#include "myFile.h"

From the "tutorial"
"There are ways to include other types of files, but I'll go over that later." - Just to let you know, this IS how you include "other types of files". The difference is how you deal with the file that you bin2c'd

---

I got bin2c to convert my image into a header file, which i am supposed to include. My question is, how do i load the image from memory using OSLib, similiar to this code with the modified graphics lib on that website:

Code:

---

Image* background = loadImageFromMemory(Name_Of_Structure,sizeof(Name_Of_Structure);

---

Zitat:

---

Zitat von SuperBatXS

I got bin2c to convert my image into a header file, which i am supposed to include. My question is, how do i load the image from memory using OSLib, similiar to this code with the modified graphics lib on that website:

Code:

---

Image* background = loadImageFromMemory(Name_Of_Structure,sizeof(Name_Of_Structure);

---

---

Just like you would load any other picture loaded in memory? I haven't used OSLib, but surely you can pass the address of a buffer containing the image to a function. Look in the oslib header file.

A simple google search lead me to "oslLoadImageFile". I'm sure that function calls another function which takes an address of a buffer holding the image. Well, it should if the code was made to be reusable...

Yes, oslib has a method to load an image internally (rather then externally). Heh, how do you think the intro function is done?

Read your documentation ;)
If you're too lazy here's a sample:

Code:

---

// your 'text' image data
const unsigned long text_data[] = { ... };

// your 'picture' image data
const unsigned long picture_data[] = { ... };

// Your array of virtual files (rather then explain either look at your documentation, even still you should be able to understand this just by looking at it)
const OSL_VIRTUALFILENAME ram_files[] =                {
        {"ram:/text.png", (void*) text_data, sizeof(text_data), &VF_MEMORY},
        {"ram:/picture.png", (void*)picture_data, sizeof(picture_data), &VF_MEMORY}
};

...

// call this once before you attempt to load the images
oslAddVirtualFileList((OSL_VIRTUALFILENAME*)ram_files, oslNumberof(ram_files));

// Then just call the load image function like an external image, just use the ram: device
OSL_IMAGE *text = oslLoadImageFile("ram:/text.png", OSL_IN_RAM | OSL_SWIZZLED, OSL_PF_8888);
oslAssert(text);

OSL_IMAGE *picture = oslLoadImageFile("ram:/picture.png", OSL_IN_RAM | OSL_SWIZZLED, OSL_PF_5551);
oslAssert(picture);

---

Zitat:

---

Zitat von SG57

Yes, oslib has a method to load an image internally (rather then externally). Heh, how do you think the intro function is done?

Read your documentation ;)
If you're too lazy here's a sample:

Code:

---

// your 'text' image data
const unsigned long text_data[] = { ... };

// your 'picture' image data
const unsigned long picture_data[] = { ... };

// Your array of virtual files (rather then explain either look at your documentation, even still you should be able to understand this just by looking at it)
const OSL_VIRTUALFILENAME ram_files[] =                {
        {"ram:/text.png", (void*) text_data, sizeof(text_data), &VF_MEMORY},
        {"ram:/picture.png", (void*)picture_data, sizeof(picture_data), &VF_MEMORY}
};

...

// call this once before you attempt to load the images
oslAddVirtualFileList((OSL_VIRTUALFILENAME*)ram_files, oslNumberof(ram_files));

// Then just call the load image function like an external image, just use the ram: device
OSL_IMAGE *text = oslLoadImageFile("ram:/text.png", OSL_IN_RAM | OSL_SWIZZLED, OSL_PF_8888);
oslAssert(text);

OSL_IMAGE *picture = oslLoadImageFile("ram:/picture.png", OSL_IN_RAM | OSL_SWIZZLED, OSL_PF_5551);
oslAssert(picture);

---

---

Seems like an overly complicated solution to a simple problem. Surely oslLoadImageFile is just a simple function that opens a file and reads it into a buffer. Then passes the address of that buffer to another function which does the real work.

I'm saying that oslLoadImageFile's purpose should only be to read a file into memory and call another function to do all the image work. All SuperBatXS needs is that function that oslLoadImageFile calls which takes the address of a buffer. No need for overly complicated virtual files in memory.

I don't care much for OSLib since I have no need to use it, just giving advice.

superbat...can i ask why you'r including an image as a header...? especially using oslib, i highly dought your ganna need your image hard-coded into the program, if your that scared of others replacing the image, just load it into the program with oslLoadImageFile, but hey if you rly need to, do wat sg said

I know what SG57 is saying, but i have no idea what you mean Moca. Could you give a snippet?

Thanks dude,
Sexy...er, SuperBatXS (wait, what's the difference)

Zitat:

---

Zitat von SuperBatXS

I know what SG57 is saying, but i have no idea what you mean Moca. Could you give a snippet?

Thanks dude,
Sexy...er, SuperBatXS (wait, what's the difference)

---

Code:

---

OSL_IMAGE* oslLoadImageFile(char *filename, int  location, int  pixelFormat)

---

There should be a function similar to this:
OSL_IMAGE* oslLoadImageBuffer(char *imageBuffer, int location, int pixelFormat)

Or something like that. It would be stupid to rewrite the image loading part of oslib over and over for each different function that blits an image.

Quick question:When reading from a text file how do you move on to the next line if a certain character is in the current line,something like ignoring comments in a .c file.
Example:
I have a .txt that has

Spoiler for myfile.txt:

255
//This is a line to be ignored
255

and all I need is the two 255's

Code:

---

p = strchr(line, '/');
if(p != NULL && p[1] == '/')
 *p = 0;

---

assuming your processing linefeeds/crs into nulls or using fgets or doing any kind of post processing etc...

could answer this a million ways. there is a lot of context missing to know how to answer (ie: how are you reading it into memory).

Zitat:

---

Zitat von Moca

Seems like an overly complicated solution to a simple problem. Surely oslLoadImageFile is just a simple function that opens a file and reads it into a buffer. Then passes the address of that buffer to another function which does the real work.

I'm saying that oslLoadImageFile's purpose should only be to read a file into memory and call another function to do all the image work. All SuperBatXS needs is that function that oslLoadImageFile calls which takes the address of a buffer. No need for overly complicated virtual files in memory.

I don't care much for OSLib since I have no need to use it, just giving advice.

---

Well the virtual file system is meant for things like that, it offers great flexibility and fancy stuff. True it may seem overly complicated for such a simple thing but it accomplishes the same thing he's looking for and to my oslib knowledge (unmodified Oslib anyway) it's the only way (the data member of an OSL_IMAGE is private IIRC)

Zitat:

---

Zitat von bnc9

Quick question:When reading from a text file how do you move on to the next line if a certain character is in the current line,something like ignoring comments in a .c file.
Example:
I have a .txt that has

Spoiler for myfile.txt:

255
//This is a line to be ignored
255

and all I need is the two 255's

---

C++ style:

PHP-Code:

---

ifstream thefile("path/to/myfile.ext");
if(thefile.fail())
{
    //error here
}
string line;
while(getline(thefile, line))
{
    if(line.find("//")!=0) //true if the line does not start with "//"
    {
        //do what you want with line        
    }
}
    
thefile.close(); 


---

The irony being you wrapped in PHP code tags lol

thnx daaa57150!! it works perfectly. I wasn't able to use my comp for the past few days (sent for repair) so I didn't see your post.

God ... it's such a basic program and yet it doesn't work xD, someone tell me what the problem is please.

Code:

---

    int main(){
    system("Untitled1.exe"); //Program tested with and without this line
    FILE* text;
    text = fopen("crash.log", "w");

    int i;
    char password[256];

    fscanf(text,"%s", password);
    fclose(text);
    printf("%s", password);

    return 0;
}

---

Its output is:

Code:

---

-LIBGCCW32-EH-3-SJLJ-GTHR-MINGW32

---

And it seems to be erasing the file crash.log aswell :/
-= Double Post =-
Nvm I know what the problem is, had it in write mode >_<

Zitat:

---

int main(){
system("Untitled1.exe"); //Program tested with and without this line
FILE* text;
text = fopen("crash.log", "w");

int i;
char password[256];

fscanf(text,"%s", password);
fclose(text);
printf("%s", password);

return 0;
}

---

I think this might help :)

int main()
{

system("Untitled1.exe"); //Program tested with and without this line
FILE* text;
text = fopen("crash.log", "w");

int i;
char password[256];

fscanf(text,"%s", password);
fclose(text);
printf("%s", password);

return 0;
}

Then again im new to C++

Zitat:

---

Zitat von MiKeY188

I think this might help :)

int main()
{

#define printf pspDebugScreenPrintf

system("Untitled1.exe"); //Program tested with and without this line
FILE* text;
text = fopen("crash.log", "w");

int i;
char password[256];

fscanf(text,"%s", password);
fclose(text);
printf("%s", password);

return 0;
}

Then again im new to C++

---

He isn't writing that for the PSP...

your missing an unlink()/remove() to delete the log file once you are done with it.

Lol i still got loads to learn!

Zitat:

---

Zitat von MiKeY188

I think this might help :)

int main()
{

system("Untitled1.exe"); //Program tested with and without this line
FILE* text;
text = fopen("crash.log", "w");

int i;
char password[256];

fscanf(text,"%s", password);
fclose(text);
printf("%s", password);

return 0;
}

Then again im new to C++

---

Well for one, you cant run EXE's on the PSP ... and that's C not C++

And ulink() ? Never used it before and i'm not gonna start now. Never heard of it ...

Solved.

Zitat:

---

Zitat von eldiablov

And ulink() ? Never used it before and i'm not gonna start now. Never heard of it ...

---

dont try and learn anything, it might hurt your pea sized brain. lol you say that like you've been programming for decades when its been what? a day judging by your poor code posted. unlink is posix, its always nice to cleanup after yourself removing unneeded output files :) fscanf, bleagh, welcome to buffer overruns and stack smashing.

Zitat:

---

Zitat von _df_

dont try and learn anything, it might hurt your pea sized brain.

---

No need to be a ****ing ass about it. So what if i'm learning? Who gives a ****? I'm sorry I dont know everything like you. I merely meant that I havent got to the stage where I need to use that stuff yet. (it's on like page 200 in C programming) which i'm reading btw.

Well the whole 'never used it not gonna start now' is not indicative of 'learning' its more indicative of acting like an ass. you asked a question to which I responded and you come back with a talk to the hand I dont want to know about it.... If you wanted help like you did originally, dont act like a brick wall.

Code:

---

text = fopen("crash.log", "w");

---

Why are you open a file to write when yo are actually you are reading from it?

observe my double post, I noticed my mistake and corrected it before anyone replied ...

Thanks anyway

hey how do i get it so that my function can have multiple variables, like for example printf("string %i%i%i", 1, 2, 3); <--their won't always be the extra variables in their...so how can i do that with my own functions?

You don't really want to. It's possible, but it's a pain and there's no real good way to do it. Look up C varargs on Google if you really want to know.

thanks archarmic, i'll look it up

Well I downloaded OSlib mod 1.0.1 and I'm trying to get it in VC++ 9. Is there an already set up development environment with OSlib that I can just write code in, or if not, how can I set it up in VC++ 9?

Thanks in advance. Please help :D

hi,
i have been struggling with geting the current working directory (getcwd(path,265)). i am trying to be able to acsess the flash directories and be able to browse throught them. and return the cwd.
here is some of my code
Code:

Zitat:

---

int fcwd = 0;
char *cwdpath = "";
static int lua_getCurrentDirectory(l ua_State *L)
{

char path[256];
//cwdpath = getcwd(path,256);
lua_pushstring(L, cwdpath);
return 1;
}

static int lua_setCurrentDirectory(l ua_State *L)
{
char *path = luaL_checkstring(L, 1);
if(!path) return luaL_error(L, "Argument error: System.currentDirectory(f ile) takes a filename as string as argument.");
char *ddp = strpbrk (":",path);
if(ddp != NULL)
{
sceIoChdir(path);
chdir(path);
cwdpath = path;
lua_pushstring(L, cwdpath);
return 1;
}
if(strcmp(cwdpath,"ms0:/") == 0)
{
sceIoChdir(path);
chdir(path);
strcat(cwdpath, path);
lua_pushstring(L, cwdpath);
return 1;
}
if(strcmp(cwdpath,"disc0:/") == 0)
{
sceIoChdir(path);
chdir(path);
strcat(cwdpath, path);
lua_pushstring(L, cwdpath);
return 1;
}
sceIoChdir(path);
chdir(path);
strcat(cwdpath, "/");
strcat(cwdpath, path);
lua_getCurrentDirectory(L );
return 1;
}

---

Regards
Homemister

I the problems I see is your not re-allocing the size of the current buffer (or freeing... lots of mem leaks) your using for the path when your strcatting. Are you getting any specific error on calling getcwd? if getcwd doesnt work against ms0/disc0 etc then you'll need to do something like what you are doing.

As a personal rule ;) I dislike calling one lua function from another, they are doorways for the lua interpreter, rather than general shared functions to be called by anything else.

untested yadda yadda yadda. getcwd would be the best solution if it worked ;)

Code:

---

int fcwd = 0;
char *cwdpath = "";

static int lua_getCurrentDirectory(l ua_State *L)
{
    lua_pushstring(L, cwdpath);
    return 1;
}

static char* realloc_path(char *cpath, char *add)
{
    char *q;
   
    q = malloc(strlen(cpath) + strlen(add) + 4);
    strcpy(q, cpath);
    strcat(q, add);
   
    free(cpath);
   
    return q;
}

static int lua_setCurrentDirectory(l ua_State *L)
{
    char *path = luaL_checkstring(L, 1);
   
    if(!path)
        return luaL_error(L, "Argument error: System.currentDirectory(file) takes a filename as string as argument.");
       
    char *ddp = strpbrk (":",path);
   
    sceIoChdir(path);
    chdir(path);
       
    if(ddp != NULL)
    {
        free(cwdpath); 
        cwdpath = path;
    }
    else if(strcmp(cwdpath,"disc0:/") == 0 || strcmp(cwdpath,"ms0:/") == 0)
    {
        cwdpath = realloc_path(cwdpath, path);
    }
    else
    {
        free(cwdpath);
        cwdpath = strdup("/");
        cwdpath = realloc_path(cwdpath, path);
    }
   
    return lua_getCurrentDirectory(L);
}

---

hello, i want to do multiple threading.. how can i do that?
actually i'm trying to do two process at once and it is quiet difficult with one "while(1){ }"

please tell me any alternatives if multiple-threading is not possible...

thnx

Why do you need two things to be done at the same time opposed to doing two things done in one frame?

i want to do like because its too difficult to control and animate two objects simultanously
-= Double Post =-
hey, i'm having a problem in using triEngine... its showing me only the blue colour of the image file... the text are printing in the colour that i tell them to print but the image is not showing its all the colours... here is the main() code:

Code:

---

int main()
{
        SetupCallbacks();

        triInit(GU_PSM_8888);
        triInputInit();
        triFontInit();
       
        // Colors
        enum colors
        {
                RED =        0xFF0000FF,
                GREEN =        0xFF00FF00,
                BLUE =        0xFFFF0000,
                WHITE =        0xFFFFFFFF
        };
       
        triImage *bg = triImageLoad("./BG.png", TRI_VRAM);
        triImage *img = triImageLoad("./Paused.png", TRI_VRAM);
        triFont *font = triFontLoad("./Verdana.ttf", 12, TRI_FONT_SIZE_PIXELS, 128, TRI_FONT_VRAM);

        triVec2f *Stick = triInputGetStick();

        while(isrunning == 1)
        {
                triClear(0xFF0000);
                triInputUpdate();

                triDrawImage2(0, 0, bg);
                triDrawImage2(0, 0, img);

                triFontActivate(font);

                triFontPrint(font, 2, 2, RED, "aLy");
                triFontPrintf(font, 2, 30, GREEN, "x: %.5f\ny: %.5f", Stick->x, Stick->y);

                triSwapbuffers();
        }

        triFontUnload(font);
        triFontShutdown();
        triClose();
        sceKernelExitGame();
        return 0;

}

---

1. Use the CODE tags.
2. Call triImageNoTint() before triSwapBuffers().
3. Multi-threading would make what you are trying to achieve even more difficult. Perhaps you need to re-think the logic that you're using to achieve the animation.

Zitat:

---

Zitat von extremealy

i want to do like because its too difficult to control and animate two objects simultanously

---

How so?

Zitat:

---

Zitat von extremealy

hello, i want to do multiple threading.. how can i do that?
actually i'm trying to do two process at once and it is quiet difficult with one "while(1){ }"

please tell me any alternatives if multiple-threading is not possible...

thnx

---

I asked the exact same question in the beginning... I laugh @ what I posted.

Let me dig that post. :ROFL:

dear _df_
thx for the help. i have tryed you code and fixed some of it to work with mine. With the getcwd() it returns the last path that i acsessed on the ms0:/
I think it could be a proplem with R/W permisions.
Regards
Homemister

Zitat:

---

Zitat von homemister91

dear _df_
thx for the help. i have tryed you code and fixed some of it to work with mine. With the getcwd() it returns the last path that i acsessed on the ms0:/
I think it could be a proplem with R/W permisions.
Regards
Homemister

---

The problem with getcwd probably goes back to the same problem does has. You have multiple drives, and it has to guess (which sounds like defaults to ms0:/ all the time) which drive you want. Since getcwd is posix, posix FS's all stem from the root so you dont have this problem.

Maybe there needs to be more of an abstraction. Since there is multiple drives. Maybe there needs to be stored the current directiory of each 'drive' (and when luaplayer starts it can default them all to the root, except for ms0 which could default to the app start directory), and could have a current drive function to return ms0/flash1 etc etc etc..

that might be a big change since it would require other IO funcs be changed to force to use the current drive info unless using absolute paths..

blah. rambling on :)

So, well, in c numbers can be represented as hexadecimals, that is, they can be shown as 0xXXXX, for example
int x = 0x0012
But, what if i had a text file, for example:

Code:

---

0x0000 0x0013 0x3394 ...
...

---

Then, how can i load it? of course,

Code:

---

int x =0;
    ifstream plik("test.txt");
    plik >> x;
    cout << x << "\n";

---

THe most blatant approach is totally stupind and of course not-working at all. Theoritically, i could check it symbol-by-symbol and convert it manually, but that wouldn't be so good. So, how can i do this (using c++ standart and PSPSDK, that is both of them)?