Actual source code: ghome.c
petsc-3.13.6 2020-09-29
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      2: /*
      3:       Code for manipulating files.
      4: */
      5:  #include <petscsys.h>

      7: /*@C
      8:    PetscGetHomeDirectory - Returns home directory name.

     10:    Not Collective

     12:    Input Parameter:
     13: .  maxlen - maximum lengh allowed

     15:    Output Parameter:
     16: .  dir - contains the home directory. Must be long enough to hold the name.

     18:    Level: developer

     20:    Note:
     21:    If PETSc cannot determine the home directory it makes dir a null string

     23:    On Windows machines the enviornmental variable HOME specifies the home directory.

     25: @*/
     26: PetscErrorCode  PetscGetHomeDirectory(char dir[],size_t maxlen)
     27: {
     29:   const char     *d1;

     32:   d1 = getenv("HOME");
     33:   if (d1) {
     34:     PetscStrncpy(dir,d1,maxlen);
     35:   } else if (maxlen > 0) dir[0] = 0;
     36:   return(0);
     37: }

     39: /*@C
     40:     PetscFixFilename - Fixes a file name so that it is correct for both Unix and
     41:     Windows by using the correct / or \ to separate directories.

     43:    Not Collective

     45:    Input Parameter:
     46: .  filein - name of file to be fixed

     48:    Output Parameter:
     49: .  fileout - the fixed name. Should long enough to hold the filename.

     51:    Level: advanced

     53:    Notes:
     54:    Call PetscFixFilename() just before calling fopen().
     55: @*/
     56: PetscErrorCode  PetscFixFilename(const char filein[],char fileout[])
     57: {
     59:   size_t         i,n;

     62:   if (!filein || !fileout) return(0);

     64:   PetscStrlen(filein,&n);
     65:   for (i=0; i<n; i++) {
     66:     if (filein[i] == PETSC_REPLACE_DIR_SEPARATOR) fileout[i] = PETSC_DIR_SEPARATOR;
     67:     else fileout[i] = filein[i];
     68:   }
     69:   fileout[n] = 0;
     70:   return(0);
     71: }