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-rw-r--r--generic/tclPathObj.c87
1 files changed, 53 insertions, 34 deletions
diff --git a/generic/tclPathObj.c b/generic/tclPathObj.c
index 7283608..a86eed8 100644
--- a/generic/tclPathObj.c
+++ b/generic/tclPathObj.c
@@ -10,7 +10,7 @@
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
- * RCS: @(#) $Id: tclPathObj.c,v 1.9 2003/09/29 22:38:21 dkf Exp $
+ * RCS: @(#) $Id: tclPathObj.c,v 1.10 2003/09/30 14:05:44 vincentdarley Exp $
*/
#include "tclInt.h"
@@ -338,25 +338,34 @@ Tcl_FSJoinPath(listObj, elements)
}
}
- if (elements == 2) {
- /*
- * This is a special case where we can be much more
- * efficient
- */
- Tcl_Obj *base;
+ res = Tcl_NewObj();
+
+ for (i = 0; i < elements; i++) {
+ Tcl_Obj *elt;
+ int driveNameLength;
+ Tcl_PathType type;
+ char *strElt;
+ int strEltLen;
+ int length;
+ char *ptr;
+ Tcl_Obj *driveName = NULL;
+
+ Tcl_ListObjIndex(NULL, listObj, i, &elt);
- Tcl_ListObjIndex(NULL, listObj, 0, &base);
/*
- * There is only any value in doing this if the first object is
- * of path type, otherwise we'll never actually get any
- * efficiency benefit elsewhere in the code (from re-using the
- * normalized representation of the base object).
+ * This is a special case where we can be much more
+ * efficient, where we are joining a single relative path
+ * onto an object that is already of path type. The
+ * 'TclNewFSPathObj' call below creates an object which
+ * can be normalized more efficiently. Currently we only
+ * use the special case when we have exactly two elements,
+ * but we could expand that in the future.
*/
- if (base->typePtr == &tclFsPathType
- && !(base->bytes != NULL && base->bytes[0] == '\0')) {
+ if ((i == (elements-2)) && (i == 0) && (elt->typePtr == &tclFsPathType)
+ && !(elt->bytes != NULL && (elt->bytes[0] == '\0'))) {
Tcl_Obj *tail;
Tcl_PathType type;
- Tcl_ListObjIndex(NULL, listObj, 1, &tail);
+ Tcl_ListObjIndex(NULL, listObj, i+1, &tail);
type = TclGetPathType(tail, NULL, NULL, NULL);
if (type == TCL_PATH_RELATIVE) {
CONST char *str;
@@ -368,10 +377,20 @@ Tcl_FSJoinPath(listObj, elements)
* '/'. There's no need to return a special path
* object, when the base itself is just fine!
*/
- return base;
+ return elt;
}
- if (str[0] != '.') {
- return TclNewFSPathObj(base, str, len);
+ /*
+ * If it doesn't begin with '.' and is a mac or unix
+ * path or it a windows path without backslashes, then we
+ * can be very efficient here. (In fact even a windows
+ * path with backslashes can be joined efficiently, but
+ * the path object would not have forward slashes only,
+ * and this would therefore contradict our 'file join'
+ * documentation).
+ */
+ if (str[0] != '.' && ((tclPlatform != TCL_PLATFORM_WINDOWS)
+ || (strchr(str, '\\') == NULL))) {
+ return TclNewFSPathObj(elt, str, len);
}
/*
* Otherwise we don't have an easy join, and
@@ -379,24 +398,24 @@ Tcl_FSJoinPath(listObj, elements)
* things
*/
} else {
- return tail;
+ if (tclPlatform == TCL_PLATFORM_UNIX) {
+ return tail;
+ } else {
+ CONST char *str;
+ int len;
+ str = Tcl_GetStringFromObj(tail,&len);
+ if (tclPlatform == TCL_PLATFORM_WINDOWS) {
+ if (strchr(str, '\\') == NULL) {
+ return tail;
+ }
+ } else if (tclPlatform == TCL_PLATFORM_MAC) {
+ if (strchr(str, '/') == NULL) {
+ return tail;
+ }
+ }
+ }
}
}
- }
-
- res = Tcl_NewObj();
-
- for (i = 0; i < elements; i++) {
- Tcl_Obj *elt;
- int driveNameLength;
- Tcl_PathType type;
- char *strElt;
- int strEltLen;
- int length;
- char *ptr;
- Tcl_Obj *driveName = NULL;
-
- Tcl_ListObjIndex(NULL, listObj, i, &elt);
strElt = Tcl_GetStringFromObj(elt, &strEltLen);
type = TclGetPathType(elt, &fsPtr, &driveNameLength, &driveName);
if (type != TCL_PATH_RELATIVE) {