diff options
Diffstat (limited to 'generic')
-rw-r--r-- | generic/tkInt.h | 8 | ||||
-rw-r--r-- | generic/tkUtil.c | 80 |
2 files changed, 88 insertions, 0 deletions
diff --git a/generic/tkInt.h b/generic/tkInt.h index dd5dcad..f360f08 100644 --- a/generic/tkInt.h +++ b/generic/tkInt.h @@ -1232,6 +1232,14 @@ MODULE_SCOPE Status TkParseColor (Display * display, MODULE_SCOPE void TkUnixSetXftClipRegion(TkRegion clipRegion); #endif +#if TCL_UTF_MAX > 4 +# define TkUtfToUniChar Tcl_UtfToUniChar +# define TkUniCharToUtf Tcl_UniCharToUtf +#else + MODULE_SCOPE int TkUtfToUniChar(const char *, int *); + MODULE_SCOPE int TkUniCharToUtf(int, char *); +#endif + /* * Unsupported commands. */ diff --git a/generic/tkUtil.c b/generic/tkUtil.c index 6563165..e686826 100644 --- a/generic/tkUtil.c +++ b/generic/tkUtil.c @@ -1192,6 +1192,86 @@ TkSendVirtualEvent( Tk_QueueWindowEvent(&event.general, TCL_QUEUE_TAIL); } + +#if TCL_UTF_MAX <= 4 +/* + *--------------------------------------------------------------------------- + * + * TkUtfToUniChar -- + * + * Almost the same as Tcl_UtfToUniChar but using int instead of Tcl_UniChar. + * This function is capable of collapsing a upper/lower surrogate pair to a + * single unicode character. So, up to 6 bytes might be consumed. + * + * Results: + * *chPtr is filled with the Tcl_UniChar, and the return value is the + * number of bytes from the UTF-8 string that were consumed. + * + * Side effects: + * None. + * + *--------------------------------------------------------------------------- + */ + +int +TkUtfToUniChar( + const char *src, /* The UTF-8 string. */ + int *chPtr) /* Filled with the Tcl_UniChar represented by + * the UTF-8 string. */ +{ + Tcl_UniChar uniChar = 0; + + int len = Tcl_UtfToUniChar(src, &uniChar); + if ((uniChar & 0xfc00) == 0xd800) { + Tcl_UniChar high = uniChar; + /* This can only happen if Tcl is compiled with TCL_UTF_MAX=4, + * or when a high surrogate character is detected in UTF-8 form */ + int len2 = Tcl_UtfToUniChar(src+len, &uniChar); + if ((uniChar & 0xfc00) == 0xdc00) { + *chPtr = (((high & 0x3ff) << 10) | (uniChar & 0x3ff)) + 0x10000; + len += len2; + } else { + *chPtr = high; + } + } else { + *chPtr = uniChar; + } + return len; +} + +/* + *--------------------------------------------------------------------------- + * + * TkUniCharToUtf -- + * + * Almost the same as Tcl_UniCharToUtf but producing surrogates if + * TCL_UTF_MAX==3. So, up to 6 bytes might be produced. + * + * Results: + * *buf is filled with the UTF-8 string, and the return value is the + * number of bytes produced. + * + * Side effects: + * None. + * + *--------------------------------------------------------------------------- + */ + +int TkUniCharToUtf(int ch, char *buf) +{ + int size = Tcl_UniCharToUtf(ch, buf); + if ((ch > 0xffff) && (ch <= 0x10ffff) && (size < 4)) { + /* Hey, this is wrong, we must be running TCL_UTF_MAX==3 + * The best thing we can do is spit out 2 surrogates */ + ch -= 0x10000; + size = Tcl_UniCharToUtf(((ch >> 10) | 0xd800), buf); + size += Tcl_UniCharToUtf(((ch & 0x3ff) | 0xdc00), buf+size); + } + return size; +} + + +#endif /* * Local Variables: * mode: c |