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author | apnadkarni <apnmbx-wits@yahoo.com> | 2023-08-13 11:56:12 (GMT) |
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committer | apnadkarni <apnmbx-wits@yahoo.com> | 2023-08-13 11:56:12 (GMT) |
commit | e2d5a2cd606bb2952ffe3c2f00fdcc0132b57130 (patch) | |
tree | 39da0c77e31060d81deb9f63f75cc5e0309855dd | |
parent | 5860a8926709c0d0c4fad457796af2b666a39ca1 (diff) | |
download | tcl-e2d5a2cd606bb2952ffe3c2f00fdcc0132b57130.zip tcl-e2d5a2cd606bb2952ffe3c2f00fdcc0132b57130.tar.gz tcl-e2d5a2cd606bb2952ffe3c2f00fdcc0132b57130.tar.bz2 |
Merge in fix for end+1 indices.
-rw-r--r-- | generic/tclListObj.c | 8 | ||||
-rw-r--r-- | generic/tclUtil.c | 9 |
2 files changed, 13 insertions, 4 deletions
diff --git a/generic/tclListObj.c b/generic/tclListObj.c index dac75d4..fd69c96 100644 --- a/generic/tclListObj.c +++ b/generic/tclListObj.c @@ -2927,6 +2927,14 @@ TclLsetFlat( } indexArray++; + /* + * Special case 0-length lists. The Tcl indexing function treat + * will return any value beyond length as TCL_SIZE_MAX for this + * case. + */ + if ((index == TCL_SIZE_MAX) && (elemCount == 0)) { + index = 0; + } if (index < 0 || index > elemCount || (valueObj == NULL && index >= elemCount)) { /* ...the index points outside the sublist. */ diff --git a/generic/tclUtil.c b/generic/tclUtil.c index ff212b0..858a490 100644 --- a/generic/tclUtil.c +++ b/generic/tclUtil.c @@ -3702,14 +3702,15 @@ GetEndOffsetFromObj( if (offset == WIDE_MAX) { /* - * Encodes end+1. This is distinguished from end+n as noted above + * Encodes end+1. This is distinguished from end+n as noted + * in function header. * NOTE: this may wrap around if the caller passes (as lset does) * listLen-1 as endValue and and listLen is 0. The -1 will be * interpreted as FF...FF and adding 1 will result in 0 which - * is what we want. 2's complements shenanigans but it is what - * it is ... + * is what we want. Callers like lset which pass in listLen-1 == -1 + * as endValue will have to adjust accordingly. */ - *widePtr = endValue + 1; + *widePtr = (endValue == -1) ? WIDE_MAX : endValue + 1; } else if (offset == WIDE_MIN) { /* -1 - position before first */ *widePtr = -1; |