diff options
Diffstat (limited to 'generic')
| -rw-r--r-- | generic/tclIO.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/generic/tclIO.c b/generic/tclIO.c index 9197b06..6add83f 100644 --- a/generic/tclIO.c +++ b/generic/tclIO.c @@ -6016,10 +6016,13 @@ ReadChars( /* * We read more chars than allowed. Reset limits to - * prevent that and try again. + * prevent that and try again. Don't forget the extra + * padding of TCL_UTF_MAX - 1 bytes demanded by the + * Tcl_ExternalToUtf() call! */ - dstLimit = Tcl_UtfAtIndex(dst, charsToRead + 1) - dst; + dstLimit = Tcl_UtfAtIndex(dst, charsToRead + 1) + + TCL_UTF_MAX - 1 - dst; statePtr->flags = savedFlags; statePtr->inputEncodingFlags = savedIEFlags; statePtr->inputEncodingState = savedState; @@ -6097,8 +6100,12 @@ ReadChars( consume: bufPtr->nextRemoved += srcRead; - if (dstWrote > srcRead + 1) { - *factorPtr = dstWrote * UTF_EXPANSION_FACTOR / srcRead; + /* + * If this read contained multibyte characters, revise factorPtr + * so the next read will allocate bigger buffers. + */ + if (numChars && numChars < srcRead) { + *factorPtr = srcRead * UTF_EXPANSION_FACTOR / numChars; } Tcl_SetObjLength(objPtr, numBytes + dstWrote); return numChars; |