Differences From Artifact [c0daf522a8]:

• File generic/tclUtf.c — part of check-in [fba6de9b22] at 2020-05-12 21:17:05 on branch core-8-branch — Little tweak to Tcl_UniCharAtIndex(): Protect against negative index, return -1 in that case. (user: jan.nijtmans size: 66833)

To Artifact [daab2dad3d]:

• File generic/tclUtf.c — part of check-in [1203d7b979] at 2020-05-20 19:09:25 on branch core-8-branch — Adapt some comments, which are not correct for Tcl 8.7 any more (user: jan.nijtmans size: 66825) [more...]

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 * Unicode characters less than this value are represented by themselves in
 * UTF-8 strings.
 */

#define UNICODE_SELF	0x80

/*
 * The following structures are used when mapping between Unicode (UCS-2) and
 * UTF-8.
 */

static const unsigned char totalBytes[256] = {
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,

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 * Unicode characters less than this value are represented by themselves in
 * UTF-8 strings.
 */

#define UNICODE_SELF	0x80

/*
 * The following structures are used when mapping between Unicode and
 * UTF-8.
 */

static const unsigned char totalBytes[256] = {
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,