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Problem with fopen very strange

 
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Ghoti



Joined: 31 Dec 2005
Posts: 288
PostPosted: Thu Nov 23, 2006 9:53 pm    Post subject: Problem with fopen very strange Reply with quote
Hi folks,

my function Load returns -3 as a value, this is returned when I try to open the file "object", the strange thing however is that it opens the file also with then return -1 if reads fails but there it does not fail,

what am i doing wrong? or is it not related to the read?


Code:
int Obj::Load(const char *object, const char *material) {

         char ReadBuffer[256];
         char Textures[200][256];
         char sBuffer[200];
         unsigned int vc=0,nc=0,tc=0, fc=0;
         unsigned int i=0;
         unsigned int j,k,l;
         unsigned int iNumberOfFaces = 0 ;
         unsigned int iNumberOfVertices = 0;
         unsigned int iNumberOfTexCoords = 0;
         unsigned int iNumberOfTextures = 0;
         unsigned int iNumberOfGroups = 0;
         iNumberOfFaces = 0;

         // read the object file
         FILE *fp = NULL;
         if ((fp = fopen(object, "rb")) == NULL) { return -1; }
         while(!feof(fp))
         {
            fgets(ReadBuffer, 256, fp);
            if (strncmp("g default", ReadBuffer, 9) == 0 ) { iNumberOfGroups++;}
            else if (strncmp("v ", ReadBuffer, 2) == 0 ) { iNumberOfVertices++; }
            else if (strncmp("vt ", ReadBuffer, 3) == 0 ) { iNumberOfTexCoords++; }
            else if (strncmp("f ", ReadBuffer, 2) == 0 ) { iNumberOfFaces++; }
         }
         fclose(fp);

         // read the textures:
         iNumberOfTextures = 0;

         if ((fp = fopen(material, "rb")) == NULL) { return -2; }
         while(!feof(fp)) {
            fgets(ReadBuffer, 256, fp);
            if (strncmp("map_Kd ", ReadBuffer, 7) == 0 ) {
               sprintf(Textures[iNumberOfTextures],"Textures/%s", strtok((ReadBuffer+7),"#"));
               iNumberOfTextures++;
            }

         }
         fclose(fp);

         ScePspFVector3   Vertices[ iNumberOfVertices ];
         ScePspFVector2   TexCoords[ iNumberOfTexCoords ];
         ObjFaceNew      Faces[ iNumberOfFaces ];


         iNumberOfParts = iNumberOfGroups;


         ObjMeshParts = (ObjMeshPart*)malloc(iNumberOfGroups * sizeof(ObjMeshPart));

         unsigned int Correction = 0;
         iNumberOfGroups = 0;

         vc=0;
         nc=0;
         tc=0;
         fc=0;

         if ((fp = fopen(object, "rb")) == NULL) { return -3; }
         while(!feof(fp))
         {
            fgets(ReadBuffer, 256, fp);
            if (strncmp("EndGroup", ReadBuffer, 8) == 0 )
            {
               

               ObjMeshParts[iNumberOfGroups].Vertices = (ObjVertexB*)malloc((fc-Correction) * 3 * sizeof(ObjVertexB));
               //tmpObj->ObjMeshPart[iNumberOfGroups].iNumberOfFaces = fc - Correction;
               ObjMeshParts[iNumberOfGroups].iFaces = (fc-Correction);
               //tmpObj->iNumberOfFaces[iNumberOfGroups] = (fc-Correction);
               l = 0;

               for (j=Correction;j<fc;j++)
               {
                  for (k=0; k<3; k++)
                  {
                     ObjMeshParts[iNumberOfGroups].Vertices[l].u = TexCoords[Faces[j].textc[k]].x;
                     ObjMeshParts[iNumberOfGroups].Vertices[l].v = -(TexCoords[Faces[j].textc[k]].y);
                     ObjMeshParts[iNumberOfGroups].Vertices[l].color = 0xffffffff;
                     ObjMeshParts[iNumberOfGroups].Vertices[l].x = Vertices[Faces[j].vertices[k]].x;
                     ObjMeshParts[iNumberOfGroups].Vertices[l].y = Vertices[Faces[j].vertices[k]].y;
                     ObjMeshParts[iNumberOfGroups].Vertices[l].z = Vertices[Faces[j].vertices[k]].z;
                     l++;
                  }
               }
               
               // the texture for this part.
               sprintf(sBuffer, "%s",Textures[iNumberOfGroups]);
               ObjMeshParts[iNumberOfGroups].texture = loadImage(sBuffer);
               if (ObjMeshParts[iNumberOfGroups].texture == NULL) { return -4; }
               
               // increment the group number.
               Correction = fc;
               iNumberOfGroups++;
            }
            else if (strncmp("v ", ReadBuffer, 2) == 0 )
            {
               sscanf((ReadBuffer+2), "%f%f%f",&Vertices[ vc ].x, &Vertices[ vc ].y, &Vertices[ vc ].z);
               vc++;
            }
            else if (strncmp("vt ", ReadBuffer, 3) == 0 )
            {
               sscanf((ReadBuffer+3), "%f%f",&TexCoords[ tc ].x, &TexCoords[ tc ].y);
               tc++;
            }

            else if (strncmp("f ", ReadBuffer, 2) == 0 )
            {
               
               char *pSplitString = NULL;
               int Waste;
               i=0;
               pSplitString = strtok((ReadBuffer+2)," \t\n");

               do {

                  sscanf((pSplitString), "%d/%d/%d",&Faces[ fc ].vertices[ i ], &Faces[ fc ].textc[ i ],&Waste);
                  Faces[ fc ].textc[ i ] -= 1;      // 1 down because the obj file objects start at 1 and arrays start at 0
                  Faces[ fc ].vertices[ i ] -= 1;
                  pSplitString = strtok(NULL," \t\n");
                  i += 1;
               }
               while( pSplitString );
               
               
               
               
               fc++;
            }
         }
         fclose(fp);



      return 0;
   };

_________________
My PSP games:

Boxy II: http://www.ghoti.nl/boxyii.php
Elementals: http://www.ghoti.nl/Elementals.php
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Ghoti



Joined: 31 Dec 2005
Posts: 288
PostPosted: Wed Nov 29, 2006 9:24 am    Post subject: Reply with quote
Hmmm well i don't really know what is wrong with this but is there an other function then fopen to use to open files and read them?
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Boxy II: http://www.ghoti.nl/boxyii.php
Elementals: http://www.ghoti.nl/Elementals.php
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TyRaNiD



Joined: 18 Jan 2004
Posts: 918
PostPosted: Thu Nov 30, 2006 12:59 am    Post subject: Reply with quote
open or the PSP specific sceIoOpen coupled with read/write sceIoRead/sceIoWrite
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TUniqueW



Joined: 09 Dec 2006
Posts: 12
PostPosted: Sat Dec 09, 2006 3:12 pm    Post subject: Reply with quote
if TyRaNiD's help didn't work -->
try setting the fp buffer to NULL or zero or w/e before opening each file that may be a problem (who knows) ..... or use three different buffers its always a good resolve for file problems,

Best,
TUW
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hlide



Joined: 10 Sep 2006
Posts: 750
PostPosted: Sat Dec 09, 2006 6:53 pm    Post subject: Reply with quote
a little off topic : do functions like fopen/fwrite/fread/fclose have some issues with standby mode because opened files are closed and those functions are not aware about this case ? I believe to have heard that somewhere in this forums. Using sceIoPen/sceIoWrite/sceIoRead/sceIoClose would work because they would be reopened when exiting standby mode.

If someone can confirm this issue or bring the counterproof, that would be a help for people to decide what to use : fopen or sceIoOpen.
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dot_blank



Joined: 28 Sep 2005
Posts: 498
Location: Brasil
PostPosted: Sat Dec 09, 2006 9:51 pm    Post subject: Reply with quote
using fopen/fwrite/fread/fclose after standby mode
will not gurantee the file handles to point where they should
you must handle these after you come out of standby mode
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Ghoti



Joined: 31 Dec 2005
Posts: 288
PostPosted: Tue Dec 12, 2006 1:20 am    Post subject: Reply with quote
Hi,

i have tried this:
Code:
FILE *fp = NULL;
before the file that causes the error but it did not work.

I have also tried this:

Code:
FILE *fb = NULL;

but this does also not work.

and the strange this is that i use to do it that way in C with the same code except that a struct was passed to the function so that that struct could be filled instead of this object using c++ but with the C code it worked fine and now it doesn't :(
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Boxy II: http://www.ghoti.nl/boxyii.php
Elementals: http://www.ghoti.nl/Elementals.php
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