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-rw-r--r--libc/misc/wchar/wchar.c253
1 files changed, 253 insertions, 0 deletions
diff --git a/libc/misc/wchar/wchar.c b/libc/misc/wchar/wchar.c
index 100ca19a8..7da3b1a50 100644
--- a/libc/misc/wchar/wchar.c
+++ b/libc/misc/wchar/wchar.c
@@ -72,6 +72,13 @@
*
* Forgot to change btowc and wctob when I changed the wc<->mb functions yesterday.
*
+ * Nov 7, 2002
+ *
+ * Add wcwidth and wcswidth, based on Markus Kuhn's wcwidth of 2002-05-08.
+ * Added some size/speed optimizations and integrated it into my locale
+ * framework. Minimally tested at the moment, but the stub C-locale
+ * version (which most people would probably be using) should be fine.
+ *
* Manuel
*/
@@ -815,3 +822,249 @@ size_t __wcsnrtombs(char *__restrict dst, const wchar_t **__restrict src,
#endif
/**********************************************************************/
+#ifdef L_wcswidth
+
+#ifdef __UCLIBC_MJN3_ONLY__
+#warning if we start doing translit, wcwidth and wcswidth will need updating.
+#endif
+
+#if defined(__UCLIBC_HAS_LOCALE__) && \
+( defined(__CTYPE_HAS_8_BIT_LOCALES) || defined(__CTYPE_HAS_UTF_8_LOCALES) )
+
+static const unsigned char new_idx[] = {
+ 0, 5, 5, 6, 10, 15, 28, 39,
+ 48, 48, 71, 94, 113, 128, 139, 154,
+ 175, 186, 188, 188, 188, 188, 188, 188,
+ 203, 208, 208, 208, 208, 208, 208, 208,
+ 208, 219, 219, 219, 222, 222, 222, 222,
+ 222, 222, 222, 222, 222, 222, 222, 224,
+ 224, 231, 231, 231, 231, 231, 231, 231,
+ 231, 231, 231, 231, 231, 231, 231, 231,
+ 231, 231, 231, 231, 231, 231, 231, 231,
+ 231, 231, 231, 231, 231, 231, 231, 231,
+ 231, 231, 231, 231, 231, 231, 231, 231,
+ 231, 231, 231, 231, 231, 231, 231, 231,
+ 231, 231, 231, 231, 231, 231, 231, 231,
+ 231, 231, 231, 231, 231, 231, 231, 231,
+ 231, 231, 231, 231, 231, 231, 231, 231,
+ 231, 231, 231, 231, 231, 231, 231, 231,
+ 231, 231, 231, 231, 231, 231, 231, 231,
+ 231, 231, 231, 231, 231, 231, 231, 231,
+ 231, 231, 231, 231, 231, 231, 231, 231,
+ 231, 231, 231, 231, 231, 231, 231, 231,
+ 231, 231, 231, 231, 231, 233, 233, 233,
+ 233, 233, 233, 233, 234, 234, 234, 234,
+ 234, 234, 234, 234, 234, 234, 234, 234,
+ 234, 234, 234, 234, 234, 234, 234, 234,
+ 234, 234, 234, 234, 234, 234, 234, 234,
+ 234, 234, 234, 234, 234, 234, 234, 234,
+ 234, 234, 234, 234, 234, 234, 234, 234,
+ 236, 236, 236, 236, 236, 236, 236, 236,
+ 236, 236, 236, 236, 236, 236, 236, 236,
+ 236, 236, 236, 236, 236, 236, 236, 236,
+ 236, 236, 236, 236, 236, 236, 236, 236,
+ 236, 237, 237, 238, 241, 241, 242, 249,
+ 255,
+};
+
+static const unsigned char new_tbl[] = {
+ 0x00, 0x01, 0x20, 0x7f, 0xa0, 0x00, 0x00, 0x50,
+ 0x60, 0x70, 0x00, 0x83, 0x87, 0x88, 0x8a, 0x00,
+ 0x91, 0xa2, 0xa3, 0xba, 0xbb, 0xbe, 0xbf, 0xc0,
+ 0xc1, 0xc3, 0xc4, 0xc5, 0x00, 0x4b, 0x56, 0x70,
+ 0x71, 0xd6, 0xe5, 0xe7, 0xe9, 0xea, 0xee, 0x00,
+ 0x0f, 0x10, 0x11, 0x12, 0x30, 0x4b, 0xa6, 0xb1,
+ 0x00, 0x01, 0x03, 0x3c, 0x3d, 0x41, 0x49, 0x4d,
+ 0x4e, 0x51, 0x55, 0x62, 0x64, 0x81, 0x82, 0xbc,
+ 0xbd, 0xc1, 0xc5, 0xcd, 0xce, 0xe2, 0xe4, 0x00,
+ 0x02, 0x03, 0x3c, 0x3d, 0x41, 0x43, 0x47, 0x49,
+ 0x4b, 0x4e, 0x70, 0x72, 0x81, 0x83, 0xbc, 0xbd,
+ 0xc1, 0xc6, 0xc7, 0xc9, 0xcd, 0xce, 0x00, 0x01,
+ 0x02, 0x3c, 0x3d, 0x3f, 0x40, 0x41, 0x44, 0x4d,
+ 0x4e, 0x56, 0x57, 0x82, 0x83, 0xc0, 0xc1, 0xcd,
+ 0xce, 0x00, 0x3e, 0x41, 0x46, 0x49, 0x4a, 0x4e,
+ 0x55, 0x57, 0xbf, 0xc0, 0xc6, 0xc7, 0xcc, 0xce,
+ 0x00, 0x41, 0x44, 0x4d, 0x4e, 0xca, 0xcb, 0xd2,
+ 0xd5, 0xd6, 0xd7, 0x00, 0x31, 0x32, 0x34, 0x3b,
+ 0x47, 0x4f, 0xb1, 0xb2, 0xb4, 0xba, 0xbb, 0xbd,
+ 0xc8, 0xce, 0x00, 0x18, 0x1a, 0x35, 0x36, 0x37,
+ 0x38, 0x39, 0x3a, 0x71, 0x7f, 0x80, 0x85, 0x86,
+ 0x88, 0x90, 0x98, 0x99, 0xbd, 0xc6, 0xc7, 0x00,
+ 0x2d, 0x31, 0x32, 0x33, 0x36, 0x38, 0x39, 0x3a,
+ 0x58, 0x5a, 0x00, 0x60, 0x00, 0x12, 0x15, 0x32,
+ 0x35, 0x52, 0x54, 0x72, 0x74, 0xb7, 0xbe, 0xc6,
+ 0xc7, 0xc9, 0xd4, 0x00, 0x0b, 0x0f, 0xa9, 0xaa,
+ 0x00, 0x0b, 0x10, 0x2a, 0x2f, 0x60, 0x64, 0x6a,
+ 0x70, 0xd0, 0xeb, 0x00, 0x29, 0x2b, 0x00, 0x80,
+ 0x00, 0x2a, 0x30, 0x3f, 0x40, 0x99, 0x9b, 0x00,
+ 0xd0, 0x00, 0x00, 0xa4, 0x00, 0x00, 0x00, 0x1e,
+ 0x1f, 0x00, 0x00, 0x10, 0x20, 0x24, 0x30, 0x70,
+ 0xff, 0x00, 0x61, 0xe0, 0xe7, 0xf9, 0xfc,
+};
+
+static const signed char new_wtbl[] = {
+ 0, -1, 1, -1, 1, 1, 0, 1,
+ 0, 1, 1, 0, 1, 0, 1, 1,
+ 0, 1, 0, 1, 0, 1, 0, 1,
+ 0, 1, 0, 1, 1, 0, 1, 0,
+ 1, 0, 1, 0, 1, 0, 1, 1,
+ 0, 1, 0, 1, 0, 1, 0, 1,
+ 1, 0, 1, 0, 1, 0, 1, 0,
+ 1, 0, 1, 0, 1, 0, 1, 0,
+ 1, 0, 1, 0, 1, 0, 1, 1,
+ 0, 1, 0, 1, 0, 1, 0, 1,
+ 0, 1, 0, 1, 0, 1, 0, 1,
+ 0, 1, 0, 1, 0, 1, 1, 0,
+ 1, 0, 1, 0, 1, 0, 1, 0,
+ 1, 0, 1, 0, 1, 0, 1, 0,
+ 1, 1, 0, 1, 0, 1, 0, 1,
+ 0, 1, 0, 1, 0, 1, 0, 1,
+ 1, 0, 1, 0, 1, 0, 1, 0,
+ 1, 0, 1, 1, 0, 1, 0, 1,
+ 0, 1, 0, 1, 0, 1, 0, 1,
+ 0, 1, 1, 0, 1, 0, 1, 0,
+ 1, 0, 1, 0, 1, 0, 1, 0,
+ 1, 0, 1, 0, 1, 0, 1, 1,
+ 0, 1, 0, 1, 0, 1, 0, 1,
+ 0, 1, 2, 0, 1, 0, 1, 0,
+ 1, 0, 1, 0, 1, 0, 1, 0,
+ 1, 0, 1, 1, 0, 1, 0, 1,
+ 1, 0, 1, 0, 1, 0, 1, 0,
+ 1, 0, 1, 1, 2, 1, 1, 2,
+ 2, 0, 2, 1, 2, 0, 2, 2,
+ 1, 1, 2, 1, 1, 2, 1, 0,
+ 1, 1, 0, 1, 0, 1, 2, 1,
+ 0, 2, 1, 2, 1, 0, 1,
+};
+
+int wcswidth(const wchar_t *pwcs, size_t n)
+{
+ int h, l, m, count;
+ wchar_t wc;
+ unsigned char b;
+
+ if (ENCODING == __ctype_encoding_7_bit) {
+ size_t i;
+
+ for (i = 0 ; (i < n) && pwcs[i] ; i++) {
+ if (pwcs[i] != ((unsigned char)(pwcs[i]))) {
+ return -1;
+ }
+ }
+ }
+#ifdef __CTYPE_HAS_8_BIT_LOCALES
+ else if (ENCODING == __ctype_encoding_8_bit) {
+ mbstate_t mbstate;
+
+ mbstate.mask = 0; /* Initialize the mbstate. */
+ if (__wcsnrtombs(NULL, &pwcs, n, SIZE_MAX, &mbstate) == ((size_t) - 1)) {
+ return -1;
+ }
+ }
+#endif /* __CTYPE_HAS_8_BIT_LOCALES */
+#if defined(__CTYPE_HAS_UTF_8_LOCALES) && defined(KUHN)
+ /* For stricter handling of allowed unicode values... see comments above. */
+ else if (ENCODING == __ctype_encoding_utf8) {
+ size_t i;
+
+ for (i = 0 ; (i < n) && pwcs[i] ; i++) {
+ if ( (((__uwchar_t)((pwcs[i]) - 0xfffeU)) < 2)
+ || (((__uwchar_t)((pwcs[i]) - 0xd800U)) < (0xe000U - 0xd800U))
+ ) {
+ return -1;
+ }
+ }
+ }
+#endif /* __CTYPE_HAS_UTF_8_LOCALES */
+
+ for (count = 0 ; n && (wc = *pwcs++) ; n--) {
+ if (wc <= 0xff) {
+ /* If we're here, wc != 0. */
+ if ((wc < 32) || ((wc >= 0x7f) && (wc < 0xa0))) {
+ return -1;
+ }
+ ++count;
+ continue;
+ }
+ if (((unsigned int) wc) <= 0xffff) {
+ b = wc & 0xff;
+ h = (wc >> 8);
+ l = new_idx[h];
+ h = new_idx[h+1];
+ while ((m = (l+h) >> 1) != l) {
+ if (b >= new_tbl[m]) {
+ l = m;
+ } else { /* wc < tbl[m] */
+ h = m;
+ }
+ }
+ count += new_wtbl[l]; /* none should be -1. */
+ continue;
+ }
+
+ /* Redo this to minimize average number of compares?*/
+ if (wc >= 0x1d167) {
+ if (wc <= 0x1d1ad) {
+ if ((wc <= 0x1d169
+ || (wc >= 0x1d173
+ && (wc <= 0x1d182
+ || (wc >= 0x1d185
+ && (wc <= 0x1d18b
+ || (wc >= 0x1d1aa))))))
+ ) {
+ continue;
+ }
+ } else if (((wc >= 0xe0020) && (wc <= 0xe007f)) || (wc == 0xe0001)) {
+ continue;
+ } else if ((wc >= 0x20000) && (wc <= 0x2ffff)) {
+ ++count; /* need 2.. add one here */
+ }
+#if (WCHAR_MAX > 0x7fffffffL)
+ else if (wc > 0x7fffffffL) {
+ return -1;
+ }
+#endif /* (WCHAR_MAX > 0x7fffffffL) */
+ }
+
+ ++count;
+ }
+
+ return count;
+}
+
+#else /* __UCLIBC_HAS_LOCALE__ */
+
+int wcswidth(const wchar_t *pwcs, size_t n)
+{
+ int count;
+ wchar_t wc;
+
+ for (count = 0 ; n && (wc = *pwcs++) ; n--) {
+ if (wc <= 0xff) {
+ /* If we're here, wc != 0. */
+ if ((wc < 32) || ((wc >= 0x7f) && (wc < 0xa0))) {
+ return -1;
+ }
+ ++count;
+ continue;
+ } else {
+ return -1;
+ }
+ }
+
+ return count;
+}
+
+#endif /* __UCLIBC_HAS_LOCALE__ */
+
+#endif
+/**********************************************************************/
+#ifdef L_wcwidth
+
+int wcwidth(wchar_t wc)
+{
+ return wcswidth(&wc, 1);
+}
+
+#endif
+/**********************************************************************/
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 14:05:54 +0000