Actual source code: ghome.c


  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 length allowed

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

 18:    Level: developer

 20:    Notes:
 21:    If PETSc cannot determine the home directory it makes `dir` an empty string

 23:    On Microsoft Windows machines the environmental variable `HOME` specifies the home directory.

 25: .seealso: `PetscGetTmp()`, `PetscSharedTmp()`, `PetscGetWorkingDirectory()`
 26: @*/
 27: PetscErrorCode PetscGetHomeDirectory(char dir[], size_t maxlen)
 28: {
 29:   const char *d1;

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

 39: /*@C
 40:     PetscFixFilename - Fixes a file name so that it is correct for both Unix and
 41:     Microsoft 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:    Note:
 54:    Call `PetscFixFilename()` just before calling `fopen()`.
 55: @*/
 56: PetscErrorCode PetscFixFilename(const char filein[], char fileout[])
 57: {
 58:   size_t i, n;

 60:   PetscFunctionBegin;
 61:   if (!filein || !fileout) PetscFunctionReturn(PETSC_SUCCESS);

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