Actual source code: ghome.c

petsc-3.8.2 2017-11-09
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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: }