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const char *
Tcl_UtfAtIndex(
register const char *src, /* The UTF-8 string. */
register size_t index) /* The position of the desired character. */
{
Tcl_UniChar ch = 0;
int len = 1;
if (index != (size_t)-1) {
while (index--) {
src += TclUtfToUniChar(src, &ch);
}
#if TCL_UTF_MAX <= 4
if (!len) {
/* Index points at character following High Surrogate */
src += TclUtfToUniChar(src, &ch);
}
#endif
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const char *
Tcl_UtfAtIndex(
register const char *src, /* The UTF-8 string. */
register size_t index) /* The position of the desired character. */
{
Tcl_UniChar ch = 0;
#if TCL_UTF_MAX <= 4
int len = 1;
#endif
if (index != (size_t)-1) {
while (index--) {
#if TCL_UTF_MAX <= 4
src += (len = TclUtfToUniChar(src, &ch));
#else
src += TclUtfToUniChar(src, &ch);
#endif
}
#if TCL_UTF_MAX <= 4
if (!len) {
/* Index points at character following High Surrogate */
src += TclUtfToUniChar(src, &ch);
}
#endif
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