Actual source code: ghome.c
petsc-3.10.5 2019-03-28
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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:    Concepts: home directory
     26: @*/
     27: PetscErrorCode  PetscGetHomeDirectory(char dir[],size_t maxlen)
     28: {
     30:   const char     *d1;

     33:   d1 = getenv("HOME");
     34:   if (d1) {
     35:     PetscStrncpy(dir,d1,maxlen);
     36:   } else if (maxlen > 0) dir[0] = 0;
     37:   return(0);
     38: }

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

     44:    Not Collective

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

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

     52:    Level: advanced

     54:    Notes:
     55:    Call PetscFixFilename() just before calling fopen().
     56: @*/
     57: PetscErrorCode  PetscFixFilename(const char filein[],char fileout[])
     58: {
     60:   size_t         i,n;

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

     65:   PetscStrlen(filein,&n);
     66:   for (i=0; i<n; i++) {
     67:     if (filein[i] == PETSC_REPLACE_DIR_SEPARATOR) fileout[i] = PETSC_DIR_SEPARATOR;
     68:     else fileout[i] = filein[i];
     69:   }
     70:   fileout[n] = 0;
     71:   return(0);
     72: }