Racket: PLT implementation renamed to Racket.

1 files changed, 54 insertions, 0 deletions

diff --git a/scheme/racket/geiser/locations.rkt b/scheme/racket/geiser/locations.rkt
new file mode 100644
index 0000000..b4c0f37
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+++ b/scheme/racket/geiser/locations.rkt
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+;;; locations.rkt -- locating symbols
+
+;; Copyright (C) 2009, 2010 Jose Antonio Ortega Ruiz
+
+;; This program is free software; you can redistribute it and/or
+;; modify it under the terms of the Modified BSD License. You should
+;; have received a copy of the license along with this program. If
+;; not, see <http://www.xfree86.org/3.3.6/COPYRIGHT2.html#5>.
+
+;; Start date: Sun Apr 26, 2009 19:43
+
+#lang racket
+
+(provide symbol-location
+         symbol-location*
+         module-location
+         symbol-module-name
+         symbol-module-path-name)
+
+(require geiser/utils geiser/modules)
+
+(define (symbol-location* sym)
+  (let* ((id (namespace-symbol->identifier sym))
+         (binding (and id (identifier-binding id))))
+    (if (list? binding)
+        (cons
+         (cadr binding)
+         (resolved-module-path-name
+          (module-path-index-resolve (car binding))))
+        (cons sym #f))))
+
+(define (make-location name path line)
+  (list (cons 'name name)
+        (cons 'file (if (path? path) (path->string path) '()))
+        (cons 'line (or line '()))))
+
+(define (symbol-location sym)
+  (let* ((loc (symbol-location* sym))
+         (name (car loc))
+         (path (cdr loc)))
+    (if path
+        (make-location name path #f)
+        (module-location sym))))
+
+(define symbol-module-path-name (compose cdr symbol-location*))
+
+(define symbol-module-name
+  (compose module-path-name->name symbol-module-path-name))
+
+(define (module-location sym)
+  (make-location sym (module-spec->path-name sym) 1))
+
+
+;;; locations.rkt ends here