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(define-module (glob)
:use-module (system foreign)
:use-module (rnrs bytevectors)
:export (glob))
(define (glob-err epath eerrno)
(error "Glob errored on ~s with errno = ~a"
(pointer->string epath) eerrno))
(eval-when (expand)
(read-enable 'curly-infix))
(define << ash)
(define GLOB_ERR {1 << 0})#| Return on read errors. |#
(define GLOB_MARK {1 << 1})#| Append a slash to each name. |#
(define GLOB_NOSORT {1 << 2})#| Don't sort the names. |#
(define GLOB_DOOFFS {1 << 3})#| Insert PGLOB->gl_offs NULLs. |#
(define GLOB_NOCHECK {1 << 4})#| If nothing matches, return the pattern. |#
(define GLOB_APPEND {1 << 5})#| Append to results of a previous call. |#
(define GLOB_NOESCAPE {1 << 6})#| Backslashes don't quote metacharacters. |#
(define GLOB_PERIOD {1 << 7})#| Leading `.' can be matched by metachars. |#
(define GLOB_MAGCHAR {1 << 8})#| Set in gl_flags if any metachars seen. |#
(define GLOB_ALTDIRFUNC {1 << 9})#| Use gl_opendir et al functions. |#
(define GLOB_BRACE {1 << 10})#| Expand "{a,b}" to "a" "b". |#
(define GLOB_NOMAGIC {1 << 11})#| If no magic chars, return the pattern. |#
(define GLOB_TILDE {1 << 12})#| Expand ~user and ~ to home directories. |#
(define GLOB_ONLYDIR {1 << 13})#| Match only directories. |#
(define GLOB_TILDE_CHECK {1 << 14})#| Like GLOB_TILDE but return an error
if the user name is not available. |#
(define glob%
(let ((this (dynamic-link)))
(pointer->procedure
int (dynamic-func "glob" this) `(* ,int * *))))
(define (glob str)
(let ((bv (make-bytevector 100)))
(let* ((globptr (glob% (string->pointer str)
(logior GLOB_MARK GLOB_BRACE GLOB_TILDE_CHECK)
(procedure->pointer int glob-err (list '* int))
(bytevector->pointer bv)))
(globstr (parse-c-struct (bytevector->pointer bv) (list size_t '* size_t))))
;; TODO the 'u64 requires that the system has 64 bit wide pointers...
(let ((strvec (pointer->bytevector (cadr globstr) (car globstr) 0 'u64)))
(map (compose pointer->string make-pointer)
(bytevector->uint-list strvec (native-endianness) (sizeof '*)))))))
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