Function svn_opt_parse_revision 

pub unsafe extern "C" fn svn_opt_parse_revision(
    start_revision: *mut svn_opt_revision_t,
    end_revision: *mut svn_opt_revision_t,
    arg: *const c_char,
    pool: *mut apr_pool_t,
) -> c_int

Set @a *start_revision and/or @a *end_revision according to @a arg, where @a arg is “N” or “N:M”, like so:

• If @a arg is “N”, set @a *start_revision to represent N, and leave @a *end_revision untouched.

• If @a arg is “N:M”, set @a *start_revision and @a *end_revision to represent N and M respectively.

N and/or M may be one of the special revision descriptors recognized by revision_from_word(), or a date in curly braces.

If @a arg is invalid, return -1; else return 0. It is invalid to omit a revision (as in, “:”, “N:” or “:M”).

@note It is typical, though not required, for @a *start_revision and @a *end_revision to be @c svn_opt_revision_unspecified kind on entry.

Use @a pool for temporary allocations.