Actual source code: ghome.c

petsc-3.5.2 2014-09-08
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  2: /*
  3:       Code for manipulating files.
  4: */
  5: #include <petscsys.h>

  9: /*@C
 10:    PetscGetHomeDirectory - Returns home directory name.

 12:    Not Collective

 14:    Input Parameter:
 15: .  maxlen - maximum lengh allowed

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

 20:    Level: developer

 22:    Note:
 23:    If PETSc cannot determine the home directory it makes dir a null string

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

 27:    Concepts: home directory
 28: @*/
 29: PetscErrorCode  PetscGetHomeDirectory(char dir[],size_t maxlen)
 30: {
 32:   const char     *d1;

 35:   d1 = getenv("HOME");
 36:   if (d1) {
 37:     PetscStrncpy(dir,d1,maxlen);
 38:   } else if (maxlen > 0) dir[0] = 0;
 39:   return(0);
 40: }

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

 48:    Not Collective

 50:    Input Parameter:
 51: .  filein - name of file to be fixed

 53:    Output Parameter:
 54: .  fileout - the fixed name. Should long enough to hold the filename.

 56:    Level: advanced

 58:    Notes:
 59:    Call PetscFixFilename() just before calling fopen().
 60: @*/
 61: PetscErrorCode  PetscFixFilename(const char filein[],char fileout[])
 62: {
 64:   size_t         i,n;

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

 69:   PetscStrlen(filein,&n);
 70:   for (i=0; i<n; i++) {
 71:     if (filein[i] == PETSC_REPLACE_DIR_SEPARATOR) fileout[i] = PETSC_DIR_SEPARATOR;
 72:     else fileout[i] = filein[i];
 73:   }
 74:   fileout[n] = 0;
 75:   return(0);
 76: }