Import sources from 2011-03-30 iso image

1 files changed, 260 insertions, 0 deletions

diff --git a/sys/src/cmd/aux/antiword/utf8.c b/sys/src/cmd/aux/antiword/utf8.c
new file mode 100755
index 000000000..2cc219143
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+++ b/sys/src/cmd/aux/antiword/utf8.c
@@ -0,0 +1,260 @@
+/*
+ * utf8.c
+ * Copyright (C) 2001-2004 A.J. van Os; Released under GPL
+ *
+ *====================================================================
+ * This part of the software is based on:
+ * An implementation of wcwidth() as defined in
+ * "The Single UNIX Specification, Version 2, The Open Group, 1997"
+ * <http://www.UNIX-systems.org/online.html>
+ * Markus Kuhn -- 2001-01-12 -- public domain
+ *====================================================================
+ * The credit should go to him, but all the bugs are mine.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include "antiword.h"
+
+struct interval {
+	USHORT	first;
+	USHORT	last;
+};
+/* Sorted list of non-overlapping intervals of non-spacing characters */
+static const struct interval combining[] = {
+	{ 0x0300, 0x034E }, { 0x0360, 0x0362 }, { 0x0483, 0x0486 },
+	{ 0x0488, 0x0489 }, { 0x0591, 0x05A1 }, { 0x05A3, 0x05B9 },
+	{ 0x05BB, 0x05BD }, { 0x05BF, 0x05BF }, { 0x05C1, 0x05C2 },
+	{ 0x05C4, 0x05C4 }, { 0x064B, 0x0655 }, { 0x0670, 0x0670 },
+	{ 0x06D6, 0x06E4 }, { 0x06E7, 0x06E8 }, { 0x06EA, 0x06ED },
+	{ 0x070F, 0x070F }, { 0x0711, 0x0711 }, { 0x0730, 0x074A },
+	{ 0x07A6, 0x07B0 }, { 0x0901, 0x0902 }, { 0x093C, 0x093C },
+	{ 0x0941, 0x0948 }, { 0x094D, 0x094D }, { 0x0951, 0x0954 },
+	{ 0x0962, 0x0963 }, { 0x0981, 0x0981 }, { 0x09BC, 0x09BC },
+	{ 0x09C1, 0x09C4 }, { 0x09CD, 0x09CD }, { 0x09E2, 0x09E3 },
+	{ 0x0A02, 0x0A02 }, { 0x0A3C, 0x0A3C }, { 0x0A41, 0x0A42 },
+	{ 0x0A47, 0x0A48 }, { 0x0A4B, 0x0A4D }, { 0x0A70, 0x0A71 },
+	{ 0x0A81, 0x0A82 }, { 0x0ABC, 0x0ABC }, { 0x0AC1, 0x0AC5 },
+	{ 0x0AC7, 0x0AC8 }, { 0x0ACD, 0x0ACD }, { 0x0B01, 0x0B01 },
+	{ 0x0B3C, 0x0B3C }, { 0x0B3F, 0x0B3F }, { 0x0B41, 0x0B43 },
+	{ 0x0B4D, 0x0B4D }, { 0x0B56, 0x0B56 }, { 0x0B82, 0x0B82 },
+	{ 0x0BC0, 0x0BC0 }, { 0x0BCD, 0x0BCD }, { 0x0C3E, 0x0C40 },
+	{ 0x0C46, 0x0C48 }, { 0x0C4A, 0x0C4D }, { 0x0C55, 0x0C56 },
+	{ 0x0CBF, 0x0CBF }, { 0x0CC6, 0x0CC6 }, { 0x0CCC, 0x0CCD },
+	{ 0x0D41, 0x0D43 }, { 0x0D4D, 0x0D4D }, { 0x0DCA, 0x0DCA },
+	{ 0x0DD2, 0x0DD4 }, { 0x0DD6, 0x0DD6 }, { 0x0E31, 0x0E31 },
+	{ 0x0E34, 0x0E3A }, { 0x0E47, 0x0E4E }, { 0x0EB1, 0x0EB1 },
+	{ 0x0EB4, 0x0EB9 }, { 0x0EBB, 0x0EBC }, { 0x0EC8, 0x0ECD },
+	{ 0x0F18, 0x0F19 }, { 0x0F35, 0x0F35 }, { 0x0F37, 0x0F37 },
+	{ 0x0F39, 0x0F39 }, { 0x0F71, 0x0F7E }, { 0x0F80, 0x0F84 },
+	{ 0x0F86, 0x0F87 }, { 0x0F90, 0x0F97 }, { 0x0F99, 0x0FBC },
+	{ 0x0FC6, 0x0FC6 }, { 0x102D, 0x1030 }, { 0x1032, 0x1032 },
+	{ 0x1036, 0x1037 }, { 0x1039, 0x1039 }, { 0x1058, 0x1059 },
+	{ 0x1160, 0x11FF }, { 0x17B7, 0x17BD }, { 0x17C6, 0x17C6 },
+	{ 0x17C9, 0x17D3 }, { 0x180B, 0x180E }, { 0x18A9, 0x18A9 },
+	{ 0x200B, 0x200F }, { 0x202A, 0x202E }, { 0x206A, 0x206F },
+	{ 0x20D0, 0x20E3 }, { 0x302A, 0x302F }, { 0x3099, 0x309A },
+	{ 0xFB1E, 0xFB1E }, { 0xFE20, 0xFE23 }, { 0xFEFF, 0xFEFF },
+	{ 0xFFF9, 0xFFFB }
+};
+
+/* Auxiliary function for binary search in interval table */
+static BOOL
+bIsZeroWidthChar(ULONG ucs)
+{
+	int low = 0;
+	int high = elementsof(combining) - 1;
+	int mid;
+
+	if (ucs < (ULONG)combining[low].first ||
+	    ucs > (ULONG)combining[high].last) {
+		return FALSE;
+	}
+
+	while (high >= low) {
+		mid = (low + high) / 2;
+		if (ucs > (ULONG)combining[mid].last) {
+			low = mid + 1;
+		} else if (ucs < (ULONG)combining[mid].first) {
+			high = mid - 1;
+		} else {
+			return TRUE;
+		}
+	}
+	return FALSE;
+} /* end of bIsZeroWidthChar */
+
+/* The following functions define the column width of an ISO 10646
+ * character as follows:
+ *
+ *    - The null character (U+0000) has a column width of 0.
+ *
+ *    - Other C0/C1 control characters and DEL will lead to a return
+ *      value of -1.
+ *
+ *    - Non-spacing and enclosing combining characters (general
+ *      category code Mn or Me in the Unicode database) have a
+ *      column width of 0.
+ *
+ *    - Other format characters (general category code Cf in the Unicode
+ *      database) and ZERO WIDTH SPACE (U+200B) have a column width of 0.
+ *
+ *    - Hangul Jamo medial vowels and final consonants (U+1160-U+11FF)
+ *      have a column width of 0.
+ *
+ *    - Spacing characters in the East Asian Wide (W) or East Asian
+ *      FullWidth (F) category as defined in Unicode Technical
+ *      Report #11 have a column width of 2.
+ *
+ *    - All remaining characters (including all printable
+ *      ISO 8859-1 and WGL4 characters, Unicode control characters,
+ *      etc.) have a column width of 1.
+ *
+ * This implementation assumes that all characters are encoded
+ * in ISO 10646.
+ *
+ * This function is not named wcwidth() to prevent name clashes
+ */
+static int
+iWcWidth(ULONG ucs)
+{
+	/* Test for 8-bit control characters */
+	if (ucs == 0) {
+		return 0;
+	}
+	if (ucs < 0x20 || (ucs >= 0x7f && ucs < 0xa0)) {
+		NO_DBG_HEX(ucs);
+		return -1;
+	}
+
+	/* Binary search in table of non-spacing characters */
+	if (bIsZeroWidthChar(ucs)) {
+		return 0;
+	}
+
+	/* Ucs is not a combining or C0/C1 control character */
+
+	return 1 +
+	(ucs >= 0x1100 &&
+	 (ucs <= 0x115f ||                    /* Hangul Jamo init. consonants */
+	  (ucs >= 0x2e80 && ucs <= 0xa4cf && (ucs & ~0x0011) != 0x300a &&
+	   ucs != 0x303f) ||                  /* CJK ... Yi */
+	  (ucs >= 0xac00 && ucs <= 0xd7a3) || /* Hangul Syllables */
+	  (ucs >= 0xf900 && ucs <= 0xfaff) || /* CJK Compatibility Ideographs */
+	  (ucs >= 0xfe30 && ucs <= 0xfe6f) || /* CJK Compatibility Forms */
+	  (ucs >= 0xff00 && ucs <= 0xff5f) || /* Fullwidth Forms */
+	  (ucs >= 0xffe0 && ucs <= 0xffe6) ||
+	  (ucs >= 0x20000 && ucs <= 0x2ffff)));
+} /* end of iWcWidth */
+
+/*
+ * utf8_to_ucs - convert from UTF-8 to UCS
+ *
+ * Returns the UCS character,
+ * Fills in the number of bytes in the UTF-8 character
+ */
+static ULONG
+utf8_to_ucs(const char *p, int iStrLen, int *piUtfLen)
+{
+	ULONG	ulUcs;
+	int	iIndex, iCharLen;
+
+	fail(p == NULL || piUtfLen == NULL);
+	fail(iStrLen < 1);
+
+	ulUcs = (ULONG)(UCHAR)p[0];
+
+	if (ulUcs < 0x80) {
+		*piUtfLen = 1;
+		return ulUcs;
+	}
+
+	if (ulUcs < 0xe0){
+		iCharLen = 2;
+		ulUcs &= 0x1f;
+	} else if (ulUcs < 0xf0){
+		iCharLen = 3;
+		ulUcs &= 0x0f;
+	} else if (ulUcs < 0xf8){
+		iCharLen = 4;
+		ulUcs &= 0x07;
+	} else if (ulUcs < 0xfc){
+		iCharLen = 5;
+		ulUcs &= 0x03;
+	} else {
+		iCharLen = 6;
+		ulUcs &= 0x01;
+	}
+	for (iIndex = 1; iIndex < iCharLen; iIndex++) {
+		ulUcs <<= 6;
+		if (iIndex < iStrLen) {
+			ulUcs |= (ULONG)(UCHAR)p[iIndex] & 0x3f;
+		}
+	}
+	*piUtfLen = iCharLen;
+	return ulUcs;
+} /* end of utf8_to_ucs */
+
+/*
+ * utf8_strwidth - compute the string width of an UTF-8 string
+ *
+ * Returns the string width in columns
+ */
+long
+utf8_strwidth(const char *pcString, size_t tNumchars)
+{
+	ULONG	ulUcs;
+	long	lTotal;
+	int	iToGo, iWidth, iUtflen;
+
+	fail(pcString == NULL || tNumchars > (size_t)INT_MAX);
+
+	lTotal = 0;
+	iToGo = (int)tNumchars;
+
+	while (iToGo > 0 && *pcString != '\0') {
+		ulUcs = utf8_to_ucs(pcString, iToGo, &iUtflen);
+		iWidth = iWcWidth(ulUcs);
+		if (iWidth > 0) {
+			lTotal += iWidth;
+		}
+		pcString += iUtflen;
+		iToGo -= iUtflen;
+	}
+	NO_DBG_DEC(lTotal);
+	return lTotal;
+} /* end of utf8_strwidth */
+
+/*
+ * utf8_chrlength - get the number of bytes in an UTF-8 character
+ *
+ * Returns the number of bytes
+ */
+int
+utf8_chrlength(const char *p)
+{
+	int	iUtflen;
+
+	fail(p == NULL);
+
+	iUtflen = -1;		/* Just to make sure */
+	(void)utf8_to_ucs(p, INT_MAX, &iUtflen);
+	NO_DBG_DEC(iUtflen);
+	return iUtflen;
+} /* end of utf8_chrlength */
+
+/*
+ * is_locale_utf8 - return TRUE if the locale is UTF-8
+ */
+BOOL
+is_locale_utf8(void)
+{
+	char	szCodeset[20];
+
+	szCodeset[0] = '\0';
+	if (!bGetNormalizedCodeset(szCodeset, sizeof(szCodeset), NULL)) {
+		return FALSE;
+	}
+	DBG_MSG(szCodeset);
+	return STREQ(szCodeset, "utf8");
+} /* end of is_locale_utf8 */