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-rw-r--r--generic/tclUtil.c40
1 files changed, 30 insertions, 10 deletions
diff --git a/generic/tclUtil.c b/generic/tclUtil.c
index 76676a1..fd3d935 100644
--- a/generic/tclUtil.c
+++ b/generic/tclUtil.c
@@ -181,8 +181,13 @@ TclMaxListLength(
* after the opening brace and *sizePtr will not include either of the
* braces. If there isn't an element in the list, *sizePtr will be zero,
* and both *elementPtr and *termPtr will point just after the last
- * character in the list. Note: this function does NOT collapse backslash
- * sequences.
+ * character in the list. If literalPtr is non-NULL, *literalPtr is set
+ * to a boolean value indicating whether the substring returned as
+ * the values of **elementPtr and *sizePtr is the literal value of
+ * a list element. If not, a call to TclCopyAndCollapse() is needed
+ * to produce the actual value of the list element. Note: this function
+ * does NOT collapse backslash sequences, but uses *literalPtr to tell
+ * callers when it is required for them to do so.
*
* Side effects:
* None.
@@ -206,8 +211,12 @@ TclFindElement(
* argument (next arg or end of list). */
int *sizePtr, /* If non-zero, fill in with size of
* element. */
- int *bracePtr) /* If non-zero, fill in with non-zero/zero to
- * indicate that arg was/wasn't in braces. */
+ int *literalPtr) /* If non-zero, fill in with non-zero/zero to
+ * indicate that the substring of *sizePtr
+ * bytes starting at **elementPtr is/is not
+ * the literal list element and therefore
+ * does not/does require a call to
+ * TclCopyAndCollapse() by the caller. */
{
CONST char *p = list;
CONST char *elemStart; /* Points to first byte of first element. */
@@ -216,6 +225,7 @@ TclFindElement(
int inQuotes = 0;
int size = 0; /* lint. */
int numChars;
+ int literal = 1;
CONST char *p2;
/*
@@ -241,9 +251,6 @@ TclFindElement(
p++;
}
elemStart = p;
- if (bracePtr != 0) {
- *bracePtr = openBraces;
- }
/*
* Find element's end (a space, close brace, or the end of the string).
@@ -301,6 +308,15 @@ TclFindElement(
*/
case '\\':
+ if (openBraces == 0) {
+ /*
+ * A backslash sequence not within a brace quoted element
+ * means the value of the element is different from the
+ * substring we are parsing. A call to TclCopyAndCollapse()
+ * is needed to produce the element value. Inform the caller.
+ */
+ literal = 0;
+ }
TclParseBackslash(p, limit - p, &numChars, NULL);
p += (numChars - 1);
break;
@@ -385,6 +401,9 @@ TclFindElement(
if (sizePtr != 0) {
*sizePtr = size;
}
+ if (literalPtr != 0) {
+ *literalPtr = literal;
+ }
return TCL_OK;
}
@@ -477,7 +496,7 @@ Tcl_SplitList(
{
CONST char **argv, *end, *element;
char *p;
- int length, size, i, result, elSize, brace;
+ int length, size, i, result, elSize;
/*
* Allocate enough space to work in. A (CONST char *) for each
@@ -496,9 +515,10 @@ Tcl_SplitList(
for (i = 0, p = ((char *) argv) + size*sizeof(char *);
*list != 0; i++) {
CONST char *prevList = list;
+ int literal;
result = TclFindElement(interp, list, length, &element, &list,
- &elSize, &brace);
+ &elSize, &literal);
length -= (list - prevList);
if (result != TCL_OK) {
ckfree((char *) argv);
@@ -516,7 +536,7 @@ Tcl_SplitList(
return TCL_ERROR;
}
argv[i] = p;
- if (brace) {
+ if (literal) {
memcpy(p, element, (size_t) elSize);
p += elSize;
*p = 0;