tclUtf.c Go to the documentation of this file. /* * tclUtf.c -- * * Routines for manipulating UTF-8 strings. * * Copyright (c) 1997-1998 Sun Microsystems, Inc. * * See the file "license.terms" for information on usage and redistribution of * this file, and for a DISCLAIMER OF ALL WARRANTIES. * * RCS: @(#) $Id: tclUtf.c,v 1.37 2005/10/31 15:59:41 dkf Exp $ */ #include "tclInt.h" /* * Include the static character classification tables and macros. */ #include "tclUniData.c" /* * The following macros are used for fast character category tests. The x_BITS * values are shifted right by the category value to determine whether the * given category is included in the set. */ #define ALPHA_BITS ((1 << UPPERCASE_LETTER) | (1 << LOWERCASE_LETTER) \ | (1 << TITLECASE_LETTER) | (1 << MODIFIER_LETTER) | (1<<OTHER_LETTER)) #define DIGIT_BITS (1 << DECIMAL_DIGIT_NUMBER) #define SPACE_BITS ((1 << SPACE_SEPARATOR) | (1 << LINE_SEPARATOR) \ | (1 << PARAGRAPH_SEPARATOR)) #define CONNECTOR_BITS (1 << CONNECTOR_PUNCTUATION) #define PRINT_BITS (ALPHA_BITS | DIGIT_BITS | SPACE_BITS | \ (1 << NON_SPACING_MARK) | (1 << ENCLOSING_MARK) | \ (1 << COMBINING_SPACING_MARK) | (1 << LETTER_NUMBER) | \ (1 << OTHER_NUMBER) | (1 << CONNECTOR_PUNCTUATION) | \ (1 << DASH_PUNCTUATION) | (1 << OPEN_PUNCTUATION) | \ (1 << CLOSE_PUNCTUATION) | (1 << INITIAL_QUOTE_PUNCTUATION) | \ (1 << FINAL_QUOTE_PUNCTUATION) | (1 << OTHER_PUNCTUATION) | \ (1 << MATH_SYMBOL) | (1 << CURRENCY_SYMBOL) | \ (1 << MODIFIER_SYMBOL) | (1 << OTHER_SYMBOL)) #define PUNCT_BITS ((1 << CONNECTOR_PUNCTUATION) | \ (1 << DASH_PUNCTUATION) | (1 << OPEN_PUNCTUATION) | \ (1 << CLOSE_PUNCTUATION) | (1 << INITIAL_QUOTE_PUNCTUATION) | \ (1 << FINAL_QUOTE_PUNCTUATION) | (1 << OTHER_PUNCTUATION)) /* * 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, 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, 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3, #if TCL_UTF_MAX > 3 4,4,4,4,4,4,4,4, #else 1,1,1,1,1,1,1,1, #endif #if TCL_UTF_MAX > 4 5,5,5,5, #else 1,1,1,1, #endif #if TCL_UTF_MAX > 5 6,6,6,6 #else 1,1,1,1 #endif }; /* * Functions used only in this module. */ static int UtfCount(int ch);  /* *--------------------------------------------------------------------------- * * UtfCount -- * * Find the number of bytes in the Utf character "ch". * * Results: * The return values is the number of bytes in the Utf character "ch". * * Side effects: * None. * *--------------------------------------------------------------------------- */ INLINE static int UtfCount( int ch) /* The Tcl_UniChar whose size is returned. */ { if ((ch > 0) && (ch < UNICODE_SELF)) { return 1; } if (ch <= 0x7FF) { return 2; } if (ch <= 0xFFFF) { return 3; } #if TCL_UTF_MAX > 3 if (ch <= 0x1FFFFF) { return 4; } if (ch <= 0x3FFFFFF) { return 5; } if (ch <= 0x7FFFFFFF) { return 6; } #endif return 3; } /* *--------------------------------------------------------------------------- * * Tcl_UniCharToUtf -- * * Store the given Tcl_UniChar as a sequence of UTF-8 bytes in the * provided buffer. Equivalent to Plan 9 runetochar(). * * Results: * The return values is the number of bytes in the buffer that were * consumed. * * Side effects: * None. * *--------------------------------------------------------------------------- */ INLINE int Tcl_UniCharToUtf( int ch, /* The Tcl_UniChar to be stored in the * buffer. */ char *buf) /* Buffer in which the UTF-8 representation of * the Tcl_UniChar is stored. Buffer must be * large enough to hold the UTF-8 character * (at most TCL_UTF_MAX bytes). */ { if ((ch > 0) && (ch < UNICODE_SELF)) { buf[0] = (char) ch; return 1; } if (ch >= 0) { if (ch <= 0x7FF) { buf[1] = (char) ((ch | 0x80) & 0xBF); buf[0] = (char) ((ch >> 6) | 0xC0); return 2; } if (ch <= 0xFFFF) { three: buf[2] = (char) ((ch | 0x80) & 0xBF); buf[1] = (char) (((ch >> 6) | 0x80) & 0xBF); buf[0] = (char) ((ch >> 12) | 0xE0); return 3; } #if TCL_UTF_MAX > 3 if (ch <= 0x1FFFFF) { buf[3] = (char) ((ch | 0x80) & 0xBF); buf[2] = (char) (((ch >> 6) | 0x80) & 0xBF); buf[1] = (char) (((ch >> 12) | 0x80) & 0xBF); buf[0] = (char) ((ch >> 18) | 0xF0); return 4; } if (ch <= 0x3FFFFFF) { buf[4] = (char) ((ch | 0x80) & 0xBF); buf[3] = (char) (((ch >> 6) | 0x80) & 0xBF); buf[2] = (char) (((ch >> 12) | 0x80) & 0xBF); buf[1] = (char) (((ch >> 18) | 0x80) & 0xBF); buf[0] = (char) ((ch >> 24) | 0xF8); return 5; } if (ch <= 0x7FFFFFFF) { buf[5] = (char) ((ch | 0x80) & 0xBF); buf[4] = (char) (((ch >> 6) | 0x80) & 0xBF); buf[3] = (char) (((ch >> 12) | 0x80) & 0xBF); buf[2] = (char) (((ch >> 18) | 0x80) & 0xBF); buf[1] = (char) (((ch >> 24) | 0x80) & 0xBF); buf[0] = (char) ((ch >> 30) | 0xFC); return 6; } #endif } ch = 0xFFFD; goto three; }  /* *--------------------------------------------------------------------------- * * Tcl_UniCharToUtfDString -- * * Convert the given Unicode string to UTF-8. * * Results: * The return value is a pointer to the UTF-8 representation of the * Unicode string. Storage for the return value is appended to the end of * dsPtr. * * Side effects: * None. * *--------------------------------------------------------------------------- */ char * Tcl_UniCharToUtfDString( CONST Tcl_UniChar *uniStr, /* Unicode string to convert to UTF-8. */ int uniLength, /* Length of Unicode string in Tcl_UniChars * (must be >= 0). */ Tcl_DString *dsPtr) /* UTF-8 representation of string is appended * to this previously initialized DString. */ { CONST Tcl_UniChar *w, *wEnd; char *p, *string; int oldLength; /* * UTF-8 string length in bytes will be <= Unicode string length * * TCL_UTF_MAX. */ oldLength = Tcl_DStringLength(dsPtr); Tcl_DStringSetLength(dsPtr, (oldLength + uniLength + 1) * TCL_UTF_MAX); string = Tcl_DStringValue(dsPtr) + oldLength; p = string; wEnd = uniStr + uniLength; for (w = uniStr; w < wEnd; ) { p += Tcl_UniCharToUtf(*w, p); w++; } Tcl_DStringSetLength(dsPtr, oldLength + (p - string)); return string; }  /* *--------------------------------------------------------------------------- * * Tcl_UtfToUniChar -- * * Extract the Tcl_UniChar represented by the UTF-8 string. Bad UTF-8 * sequences are converted to valid Tcl_UniChars and processing * continues. Equivalent to Plan 9 chartorune(). * * The caller must ensure that the source buffer is long enough that this * routine does not run off the end and dereference non-existent memory * looking for trail bytes. If the source buffer is known to be '\0' * terminated, this cannot happen. Otherwise, the caller should call * Tcl_UtfCharComplete() before calling this routine to ensure that * enough bytes remain in the string. * * 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 Tcl_UtfToUniChar( register CONST char *src, /* The UTF-8 string. */ register Tcl_UniChar *chPtr)/* Filled with the Tcl_UniChar represented by * the UTF-8 string. */ { register int byte; /* * Unroll 1 to 3 byte UTF-8 sequences, use loop to handle longer ones. */ byte = *((unsigned char *) src); if (byte < 0xC0) { /* * Handles properly formed UTF-8 characters between 0x01 and 0x7F. * Also treats \0 and naked trail bytes 0x80 to 0xBF as valid * characters representing themselves. */ *chPtr = (Tcl_UniChar) byte; return 1; } else if (byte < 0xE0) { if ((src[1] & 0xC0) == 0x80) { /* * Two-byte-character lead-byte followed by a trail-byte. */ *chPtr = (Tcl_UniChar) (((byte & 0x1F) << 6) | (src[1] & 0x3F)); return 2; } /* * A two-byte-character lead-byte not followed by trail-byte * represents itself. */ *chPtr = (Tcl_UniChar) byte; return 1; } else if (byte < 0xF0) { if (((src[1] & 0xC0) == 0x80) && ((src[2] & 0xC0) == 0x80)) { /* * Three-byte-character lead byte followed by two trail bytes. */ *chPtr = (Tcl_UniChar) (((byte & 0x0F) << 12) | ((src[1] & 0x3F) << 6) | (src[2] & 0x3F)); return 3; } /* * A three-byte-character lead-byte not followed by two trail-bytes * represents itself. */ *chPtr = (Tcl_UniChar) byte; return 1; } #if TCL_UTF_MAX > 3 { int ch, total, trail; total = totalBytes[byte]; trail = total - 1; if (trail > 0) { ch = byte & (0x3F >> trail); do { src++; if ((*src & 0xC0) != 0x80) { *chPtr = byte; return 1; } ch <<= 6; ch |= (*src & 0x3F); trail--; } while (trail > 0); *chPtr = ch; return total; } } #endif *chPtr = (Tcl_UniChar) byte; return 1; }  /* *--------------------------------------------------------------------------- * * Tcl_UtfToUniCharDString -- * * Convert the UTF-8 string to Unicode. * * Results: * The return value is a pointer to the Unicode representation of the * UTF-8 string. Storage for the return value is appended to the end of * dsPtr. The Unicode string is terminated with a Unicode NULL character. * * Side effects: * None. * *--------------------------------------------------------------------------- */ Tcl_UniChar * Tcl_UtfToUniCharDString( CONST char *src, /* UTF-8 string to convert to Unicode. */ int length, /* Length of UTF-8 string in bytes, or -1 for * strlen(). */ Tcl_DString *dsPtr) /* Unicode representation of string is * appended to this previously initialized * DString. */ { Tcl_UniChar *w, *wString; CONST char *p, *end; int oldLength; if (length < 0) { length = strlen(src); } /* * Unicode string length in Tcl_UniChars will be <= UTF-8 string length in * bytes. */ oldLength = Tcl_DStringLength(dsPtr); Tcl_DStringSetLength(dsPtr, (int) ((oldLength + length + 1) * sizeof(Tcl_UniChar))); wString = (Tcl_UniChar *) (Tcl_DStringValue(dsPtr) + oldLength); w = wString; end = src + length; for (p = src; p < end; ) { p += TclUtfToUniChar(p, w); w++; } *w = '\0'; Tcl_DStringSetLength(dsPtr, (oldLength + ((char *) w - (char *) wString))); return wString; }  /* *--------------------------------------------------------------------------- * * Tcl_UtfCharComplete -- * * Determine if the UTF-8 string of the given length is long enough to be * decoded by Tcl_UtfToUniChar(). This does not ensure that the UTF-8 * string is properly formed. Equivalent to Plan 9 fullrune(). * * Results: * The return value is 0 if the string is not long enough, non-zero * otherwise. * * Side effects: * None. * *--------------------------------------------------------------------------- */ int Tcl_UtfCharComplete( CONST char *src, /* String to check if first few bytes contain * a complete UTF-8 character. */ int length) /* Length of above string in bytes. */ { int ch; ch = *((unsigned char *) src); return length >= totalBytes[ch]; }  /* *--------------------------------------------------------------------------- * * Tcl_NumUtfChars -- * * Returns the number of characters (not bytes) in the UTF-8 string, not * including the terminating NULL byte. This is equivalent to Plan 9 * utflen() and utfnlen(). * * Results: * As above. * * Side effects: * None. * *--------------------------------------------------------------------------- */ int Tcl_NumUtfChars( register CONST char *src, /* The UTF-8 string to measure. */ int length) /* The length of the string in bytes, or -1 * for strlen(string). */ { Tcl_UniChar ch; register Tcl_UniChar *chPtr = &ch; register int i; /* * The separate implementations are faster. * * Since this is a time-sensitive function, we also do the check for the * single-byte char case specially. */ i = 0; if (length < 0) { while (*src != '\0') { src += TclUtfToUniChar(src, chPtr); i++; } } else { register int n; while (length > 0) { if (UCHAR(*src) < 0xC0) { length--; src++; } else { n = Tcl_UtfToUniChar(src, chPtr); length -= n; src += n; } i++; } } return i; }  /* *--------------------------------------------------------------------------- * * Tcl_UtfFindFirst -- * * Returns a pointer to the first occurance of the given Tcl_UniChar in * the NULL-terminated UTF-8 string. The NULL terminator is considered * part of the UTF-8 string. Equivalent to Plan 9 utfrune(). * * Results: * As above. If the Tcl_UniChar does not exist in the given string, the * return value is NULL. * * Side effects: * None. * *--------------------------------------------------------------------------- */ CONST char * Tcl_UtfFindFirst( CONST char *src, /* The UTF-8 string to be searched. */ int ch) /* The Tcl_UniChar to search for. */ { int len; Tcl_UniChar find; while (1) { len = TclUtfToUniChar(src, &find); if (find == ch) { return src; } if (*src == '\0') { return NULL; } src += len; } }  /* *--------------------------------------------------------------------------- * * Tcl_UtfFindLast -- * * Returns a pointer to the last occurance of the given Tcl_UniChar in * the NULL-terminated UTF-8 string. The NULL terminator is considered * part of the UTF-8 string. Equivalent to Plan 9 utfrrune(). * * Results: * As above. If the Tcl_UniChar does not exist in the given string, the * return value is NULL. * * Side effects: * None. * *--------------------------------------------------------------------------- */ CONST char * Tcl_UtfFindLast( CONST char *src, /* The UTF-8 string to be searched. */ int ch) /* The Tcl_UniChar to search for. */ { int len; Tcl_UniChar find; CONST char *last; last = NULL; while (1) { len = TclUtfToUniChar(src, &find); if (find == ch) { last = src; } if (*src == '\0') { break; } src += len; } return last; }  /* *--------------------------------------------------------------------------- * * Tcl_UtfNext -- * * Given a pointer to some current location in a UTF-8 string, move * forward one character. The caller must ensure that they are not asking * for the next character after the last character in the string. * * Results: * The return value is the pointer to the next character in the UTF-8 * string. * * Side effects: * None. * *--------------------------------------------------------------------------- */ CONST char * Tcl_UtfNext( CONST char *src) /* The current location in the string. */ { Tcl_UniChar ch; return src + TclUtfToUniChar(src, &ch); }  /* *--------------------------------------------------------------------------- * * Tcl_UtfPrev -- * * Given a pointer to some current location in a UTF-8 string, move * backwards one character. This works correctly when the pointer is in * the middle of a UTF-8 character. * * Results: * The return value is a pointer to the previous character in the UTF-8 * string. If the current location was already at the beginning of the * string, the return value will also be a pointer to the beginning of * the string. * * Side effects: * None. * *--------------------------------------------------------------------------- */ CONST char * Tcl_UtfPrev( CONST char *src, /* The current location in the string. */ CONST char *start) /* Pointer to the beginning of the string, to * avoid going backwards too far. */ { CONST char *look; int i, byte; src--; look = src; for (i = 0; i < TCL_UTF_MAX; i++) { if (look < start) { if (src < start) { src = start; } break; } byte = *((unsigned char *) look); if (byte < 0x80) { break; } if (byte >= 0xC0) { return look; } look--; } return src; }  /* *--------------------------------------------------------------------------- * * Tcl_UniCharAtIndex -- * * Returns the Unicode character represented at the specified character * (not byte) position in the UTF-8 string. * * Results: * As above. * * Side effects: * None. * *--------------------------------------------------------------------------- */ Tcl_UniChar Tcl_UniCharAtIndex( register CONST char *src, /* The UTF-8 string to dereference. */ register int index) /* The position of the desired character. */ { Tcl_UniChar ch; while (index >= 0) { index--; src += TclUtfToUniChar(src, &ch); } return ch; }  /* *--------------------------------------------------------------------------- * * Tcl_UtfAtIndex -- * * Returns a pointer to the specified character (not byte) position in * the UTF-8 string. * * Results: * As above. * * Side effects: * None. * *--------------------------------------------------------------------------- */ CONST char * Tcl_UtfAtIndex( register CONST char *src, /* The UTF-8 string. */ register int index) /* The position of the desired character. */ { Tcl_UniChar ch; while (index > 0) { index--; src += TclUtfToUniChar(src, &ch); } return src; }  /* *--------------------------------------------------------------------------- * * Tcl_UtfBackslash -- * * Figure out how to handle a backslash sequence. * * Results: * Stores the bytes represented by the backslash sequence in dst and * returns the number of bytes written to dst. At most TCL_UTF_MAX bytes * are written to dst; dst must have been large enough to accept those * bytes. If readPtr isn't NULL then it is filled in with a count of the * number of bytes in the backslash sequence. * * Side effects: * The maximum number of bytes it takes to represent a Unicode character * in UTF-8 is guaranteed to be less than the number of bytes used to * express the backslash sequence that represents that Unicode character. * If the target buffer into which the caller is going to store the bytes * that represent the Unicode character is at least as large as the * source buffer from which the backslashed sequence was extracted, no * buffer overruns should occur. * *--------------------------------------------------------------------------- */ int Tcl_UtfBackslash( CONST char *src, /* Points to the backslash character of a * backslash sequence. */ int *readPtr, /* Fill in with number of characters read from * src, unless NULL. */ char *dst) /* Filled with the bytes represented by the * backslash sequence. */ { #define LINE_LENGTH 128 int numRead; int result; result = TclParseBackslash(src, LINE_LENGTH, &numRead, dst); if (numRead == LINE_LENGTH) { /* * We ate a whole line. Pay the price of a strlen() */ result = TclParseBackslash(src, (int)strlen(src), &numRead, dst); } if (readPtr != NULL) { *readPtr = numRead; } return result; }  /* *---------------------------------------------------------------------- * * Tcl_UtfToUpper -- * * Convert lowercase characters to uppercase characters in a UTF string * in place. The conversion may shrink the UTF string. * * Results: * Returns the number of bytes in the resulting string excluding the * trailing null. * * Side effects: * Writes a terminating null after the last converted character. * *---------------------------------------------------------------------- */ int Tcl_UtfToUpper( char *str) /* String to convert in place. */ { Tcl_UniChar ch, upChar; char *src, *dst; int bytes; /* * Iterate over the string until we hit the terminating null. */ src = dst = str; while (*src) { bytes = TclUtfToUniChar(src, &ch); upChar = Tcl_UniCharToUpper(ch); /* * To keep badly formed Utf strings from getting inflated by the * conversion (thereby causing a segfault), only copy the upper case * char to dst if its size is <= the original char. */ if (bytes < UtfCount(upChar)) { memcpy(dst, src, (size_t) bytes); dst += bytes; } else { dst += Tcl_UniCharToUtf(upChar, dst); } src += bytes; } *dst = '\0'; return (dst - str); }  /* *---------------------------------------------------------------------- * * Tcl_UtfToLower -- * * Convert uppercase characters to lowercase characters in a UTF string * in place. The conversion may shrink the UTF string. * * Results: * Returns the number of bytes in the resulting string excluding the * trailing null. * * Side effects: * Writes a terminating null after the last converted character. * *---------------------------------------------------------------------- */ int Tcl_UtfToLower( char *str) /* String to convert in place. */ { Tcl_UniChar ch, lowChar; char *src, *dst; int bytes; /* * Iterate over the string until we hit the terminating null. */ src = dst = str; while (*src) { bytes = TclUtfToUniChar(src, &ch); lowChar = Tcl_UniCharToLower(ch); /* * To keep badly formed Utf strings from getting inflated by the * conversion (thereby causing a segfault), only copy the lower case * char to dst if its size is <= the original char. */ if (bytes < UtfCount(lowChar)) { memcpy(dst, src, (size_t) bytes); dst += bytes; } else { dst += Tcl_UniCharToUtf(lowChar, dst); } src += bytes; } *dst = '\0'; return (dst - str); }  /* *---------------------------------------------------------------------- * * Tcl_UtfToTitle -- * * Changes the first character of a UTF string to title case or uppercase * and the rest of the string to lowercase. The conversion happens in * place and may shrink the UTF string. * * Results: * Returns the number of bytes in the resulting string excluding the * trailing null. * * Side effects: * Writes a terminating null after the last converted character. * *---------------------------------------------------------------------- */ int Tcl_UtfToTitle( char *str) /* String to convert in place. */ { Tcl_UniChar ch, titleChar, lowChar; char *src, *dst; int bytes; /* * Capitalize the first character and then lowercase the rest of the * characters until we get to a null. */ src = dst = str; if (*src) { bytes = TclUtfToUniChar(src, &ch); titleChar = Tcl_UniCharToTitle(ch); if (bytes < UtfCount(titleChar)) { memcpy(dst, src, (size_t) bytes); dst += bytes; } else { dst += Tcl_UniCharToUtf(titleChar, dst); } src += bytes; } while (*src) { bytes = TclUtfToUniChar(src, &ch); lowChar = Tcl_UniCharToLower(ch); if (bytes < UtfCount(lowChar)) { memcpy(dst, src, (size_t) bytes); dst += bytes; } else { dst += Tcl_UniCharToUtf(lowChar, dst); } src += bytes; } *dst = '\0'; return (dst - str); }  /* *---------------------------------------------------------------------- * * TclpUtfNcmp2 -- * * Compare at most numBytes bytes of utf-8 strings cs and ct. Both cs and * ct are assumed to be at least numBytes bytes long. * * Results: * Return <0 if cs < ct, 0 if cs == ct, or >0 if cs > ct. * * Side effects: * None. * *---------------------------------------------------------------------- */ int TclpUtfNcmp2( CONST char *cs, /* UTF string to compare to ct. */ CONST char *ct, /* UTF string cs is compared to. */ unsigned long numBytes) /* Number of *bytes* to compare. */ { /* * We can't simply call 'memcmp(cs, ct, numBytes);' because we need to * check for Tcl's \xC0\x80 non-utf-8 null encoding. Otherwise utf-8 lexes * fine in the strcmp manner. */ register int result = 0; for ( ; numBytes != 0; numBytes--, cs++, ct++) { if (*cs != *ct) { result = UCHAR(*cs) - UCHAR(*ct); break; } } if (numBytes && ((UCHAR(*cs) == 0xC0) || (UCHAR(*ct) == 0xC0))) { unsigned char c1, c2; c1 = ((UCHAR(*cs) == 0xC0) && (UCHAR(cs[1]) == 0x80)) ? 0 : UCHAR(*cs); c2 = ((UCHAR(*ct) == 0xC0) && (UCHAR(ct[1]) == 0x80)) ? 0 : UCHAR(*ct); result = (c1 - c2); } return result; }  /* *---------------------------------------------------------------------- * * Tcl_UtfNcmp -- * * Compare at most numChars UTF chars of string cs to string ct. Both cs * and ct are assumed to be at least numChars UTF chars long. * * Results: * Return <0 if cs < ct, 0 if cs == ct, or >0 if cs > ct. * * Side effects: * None. * *---------------------------------------------------------------------- */ int Tcl_UtfNcmp( CONST char *cs, /* UTF string to compare to ct. */ CONST char *ct, /* UTF string cs is compared to. */ unsigned long numChars) /* Number of UTF chars to compare. */ { Tcl_UniChar ch1, ch2; /* * Cannot use 'memcmp(cs, ct, n);' as byte representation of \u0000 (the * pair of bytes 0xc0,0x80) is larger than byte representation of \u0001 * (the byte 0x01.) */ while (numChars-- > 0) { /* * n must be interpreted as chars, not bytes. This should be called * only when both strings are of at least n chars long (no need for \0 * check) */ cs += TclUtfToUniChar(cs, &ch1); ct += TclUtfToUniChar(ct, &ch2); if (ch1 != ch2) { return (ch1 - ch2); } } return 0; }  /* *---------------------------------------------------------------------- * * Tcl_UtfNcasecmp -- * * Compare at most numChars UTF chars of string cs to string ct case * insensitive. Both cs and ct are assumed to be at least numChars UTF * chars long. * * Results: * Return <0 if cs < ct, 0 if cs == ct, or >0 if cs > ct. * * Side effects: * None. * *---------------------------------------------------------------------- */ int Tcl_UtfNcasecmp( CONST char *cs, /* UTF string to compare to ct. */ CONST char *ct, /* UTF string cs is compared to. */ unsigned long numChars) /* Number of UTF chars to compare. */ { Tcl_UniChar ch1, ch2; while (numChars-- > 0) { /* * n must be interpreted as chars, not bytes. * This should be called only when both strings are of * at least n chars long (no need for \0 check) */ cs += TclUtfToUniChar(cs, &ch1); ct += TclUtfToUniChar(ct, &ch2); if (ch1 != ch2) { ch1 = Tcl_UniCharToLower(ch1); ch2 = Tcl_UniCharToLower(ch2); if (ch1 != ch2) { return (ch1 - ch2); } } } return 0; }  /* *---------------------------------------------------------------------- * * Tcl_UniCharToUpper -- * * Compute the uppercase equivalent of the given Unicode character. * * Results: * Returns the uppercase Unicode character. * * Side effects: * None. * *---------------------------------------------------------------------- */ Tcl_UniChar Tcl_UniCharToUpper( int ch) /* Unicode character to convert. */ { int info = GetUniCharInfo(ch); if (GetCaseType(info) & 0x04) { return (Tcl_UniChar) (ch - GetDelta(info)); } else { return ch; } }  /* *---------------------------------------------------------------------- * * Tcl_UniCharToLower -- * * Compute the lowercase equivalent of the given Unicode character. * * Results: * Returns the lowercase Unicode character. * * Side effects: * None. * *---------------------------------------------------------------------- */ Tcl_UniChar Tcl_UniCharToLower( int ch) /* Unicode character to convert. */ { int info = GetUniCharInfo(ch); if (GetCaseType(info) & 0x02) { return (Tcl_UniChar) (ch + GetDelta(info)); } else { return ch; } }  /* *---------------------------------------------------------------------- * * Tcl_UniCharToTitle -- * * Compute the titlecase equivalent of the given Unicode character. * * Results: * Returns the titlecase Unicode character. * * Side effects: * None. * *---------------------------------------------------------------------- */ Tcl_UniChar Tcl_UniCharToTitle( int ch) /* Unicode character to convert. */ { int info = GetUniCharInfo(ch); int mode = GetCaseType(info); if (mode & 0x1) { /* * Subtract or add one depending on the original case. */ return (Tcl_UniChar) (ch + ((mode & 0x4) ? -1 : 1)); } else if (mode == 0x4) { return (Tcl_UniChar) (ch - GetDelta(info)); } else { return ch; } }  /* *---------------------------------------------------------------------- * * Tcl_UniCharLen -- * * Find the length of a UniChar string. The str input must be null * terminated. * * Results: * Returns the length of str in UniChars (not bytes). * * Side effects: * None. * *---------------------------------------------------------------------- */ int Tcl_UniCharLen( CONST Tcl_UniChar *uniStr) /* Unicode string to find length of. */ { int len = 0; while (*uniStr != '\0') { len++; uniStr++; } return len; }  /* *---------------------------------------------------------------------- * * Tcl_UniCharNcmp -- * * Compare at most numChars unichars of string ucs to string uct. * Both ucs and uct are assumed to be at least numChars unichars long. * * Results: * Return <0 if ucs < uct, 0 if ucs == uct, or >0 if ucs > uct. * * Side effects: * None. * *---------------------------------------------------------------------- */ int Tcl_UniCharNcmp( CONST Tcl_UniChar *ucs, /* Unicode string to compare to uct. */ CONST Tcl_UniChar *uct, /* Unicode string ucs is compared to. */ unsigned long numChars) /* Number of unichars to compare. */ { #ifdef WORDS_BIGENDIAN /* * We are definitely on a big-endian machine; memcmp() is safe */ return memcmp(ucs, uct, numChars*sizeof(Tcl_UniChar)); #else /* !WORDS_BIGENDIAN */ /* * We can't simply call memcmp() because that is not lexically correct. */ for ( ; numChars != 0; ucs++, uct++, numChars--) { if (*ucs != *uct) { return (*ucs - *uct); } } return 0; #endif /* WORDS_BIGENDIAN */ }  /* *---------------------------------------------------------------------- * * Tcl_UniCharNcasecmp -- * * Compare at most numChars unichars of string ucs to string uct case * insensitive. Both ucs and uct are assumed to be at least numChars * unichars long. * * Results: * Return <0 if ucs < uct, 0 if ucs == uct, or >0 if ucs > uct. * * Side effects: * None. * *---------------------------------------------------------------------- */ int Tcl_UniCharNcasecmp( CONST Tcl_UniChar *ucs, /* Unicode string to compare to uct. */ CONST Tcl_UniChar *uct, /* Unicode string ucs is compared to. */ unsigned long numChars) /* Number of unichars to compare. */ { for ( ; numChars != 0; numChars--, ucs++, uct++) { if (*ucs != *uct) { Tcl_UniChar lcs = Tcl_UniCharToLower(*ucs); Tcl_UniChar lct = Tcl_UniCharToLower(*uct); if (lcs != lct) { return (lcs - lct); } } } return 0; }  /* *---------------------------------------------------------------------- * * Tcl_UniCharIsAlnum -- * * Test if a character is an alphanumeric Unicode character. * * Results: * Returns 1 if character is alphanumeric. * * Side effects: * None. * *---------------------------------------------------------------------- */ int Tcl_UniCharIsAlnum( int ch) /* Unicode character to test. */ { register int category = (GetUniCharInfo(ch) & UNICODE_CATEGORY_MASK); return (((ALPHA_BITS | DIGIT_BITS) >> category) & 1); }  /* *---------------------------------------------------------------------- * * Tcl_UniCharIsAlpha -- * * Test if a character is an alphabetic Unicode character. * * Results: * Returns 1 if character is alphabetic. * * Side effects: * None. * *---------------------------------------------------------------------- */ int Tcl_UniCharIsAlpha( int ch) /* Unicode character to test. */ { register int category = (GetUniCharInfo(ch) & UNICODE_CATEGORY_MASK); return ((ALPHA_BITS >> category) & 1); }  /* *---------------------------------------------------------------------- * * Tcl_UniCharIsControl -- * * Test if a character is a Unicode control character. * * Results: * Returns non-zero if character is a control. * * Side effects: * None. * *---------------------------------------------------------------------- */ int Tcl_UniCharIsControl( int ch) /* Unicode character to test. */ { return ((GetUniCharInfo(ch) & UNICODE_CATEGORY_MASK) == CONTROL); }  /* *---------------------------------------------------------------------- * * Tcl_UniCharIsDigit -- * * Test if a character is a numeric Unicode character. * * Results: * Returns non-zero if character is a digit. * * Side effects: * None. * *---------------------------------------------------------------------- */ int Tcl_UniCharIsDigit( int ch) /* Unicode character to test. */ { return (GetUniCharInfo(ch)&UNICODE_CATEGORY_MASK) == DECIMAL_DIGIT_NUMBER; }  /* *---------------------------------------------------------------------- * * Tcl_UniCharIsGraph -- * * Test if a character is any Unicode print character except space. * * Results: * Returns non-zero if character is printable, but not space. * * Side effects: * None. * *---------------------------------------------------------------------- */ int Tcl_UniCharIsGraph( int ch) /* Unicode character to test. */ { register int category = (GetUniCharInfo(ch) & UNICODE_CATEGORY_MASK); return (((PRINT_BITS >> category) & 1) && ((unsigned char) ch != ' ')); }  /* *---------------------------------------------------------------------- * * Tcl_UniCharIsLower -- * * Test if a character is a lowercase Unicode character. * * Results: * Returns non-zero if character is lowercase. * * Side effects: * None. * *---------------------------------------------------------------------- */ int Tcl_UniCharIsLower( int ch) /* Unicode character to test. */ { return ((GetUniCharInfo(ch) & UNICODE_CATEGORY_MASK) == LOWERCASE_LETTER); }  /* *---------------------------------------------------------------------- * * Tcl_UniCharIsPrint -- * * Test if a character is a Unicode print character. * * Results: * Returns non-zero if character is printable. * * Side effects: * None. * *---------------------------------------------------------------------- */ int Tcl_UniCharIsPrint( int ch) /* Unicode character to test. */ { register int category = (GetUniCharInfo(ch) & UNICODE_CATEGORY_MASK); return ((PRINT_BITS >> category) & 1); }  /* *---------------------------------------------------------------------- * * Tcl_UniCharIsPunct -- * * Test if a character is a Unicode punctuation character. * * Results: * Returns non-zero if character is punct. * * Side effects: * None. * *---------------------------------------------------------------------- */ int Tcl_UniCharIsPunct( int ch) /* Unicode character to test. */ { register int category = (GetUniCharInfo(ch) & UNICODE_CATEGORY_MASK); return ((PUNCT_BITS >> category) & 1); }  /* *---------------------------------------------------------------------- * * Tcl_UniCharIsSpace -- * * Test if a character is a whitespace Unicode character. * * Results: * Returns non-zero if character is a space. * * Side effects: * None. * *---------------------------------------------------------------------- */ int Tcl_UniCharIsSpace( int ch) /* Unicode character to test. */ { register int category; /* * If the character is within the first 127 characters, just use the * standard C function, otherwise consult the Unicode table. */ if (ch < 0x80) { return isspace(UCHAR(ch)); /* INTL: ISO space */ } else { category = (GetUniCharInfo(ch) & UNICODE_CATEGORY_MASK); return ((SPACE_BITS >> category) & 1); } }  /* *---------------------------------------------------------------------- * * Tcl_UniCharIsUpper -- * * Test if a character is a uppercase Unicode character. * * Results: * Returns non-zero if character is uppercase. * * Side effects: * None. * *---------------------------------------------------------------------- */ int Tcl_UniCharIsUpper( int ch) /* Unicode character to test. */ { return ((GetUniCharInfo(ch) & UNICODE_CATEGORY_MASK) == UPPERCASE_LETTER); }  /* *---------------------------------------------------------------------- * * Tcl_UniCharIsWordChar -- * * Test if a character is alphanumeric or a connector punctuation mark. * * Results: * Returns 1 if character is a word character. * * Side effects: * None. * *---------------------------------------------------------------------- */ int Tcl_UniCharIsWordChar( int ch) /* Unicode character to test. */ { register int category = (GetUniCharInfo(ch) & UNICODE_CATEGORY_MASK); return (((ALPHA_BITS | DIGIT_BITS | CONNECTOR_BITS) >> category) & 1); }  /* *---------------------------------------------------------------------- * * Tcl_UniCharCaseMatch -- * * See if a particular Unicode string matches a particular pattern. * Allows case insensitivity. This is the Unicode equivalent of the char* * Tcl_StringCaseMatch. The UniChar strings must be NULL-terminated. * This has no provision for counted UniChar strings, thus should not be * used where NULLs are expected in the UniChar string. Use * TclUniCharMatch where possible. * * Results: * The return value is 1 if string matches pattern, and 0 otherwise. The * matching operation permits the following special characters in the * pattern: *?\[] (see the manual entry for details on what these mean). * * Side effects: * None. * *---------------------------------------------------------------------- */ int Tcl_UniCharCaseMatch( CONST Tcl_UniChar *uniStr, /* Unicode String. */ CONST Tcl_UniChar *uniPattern, /* Pattern, which may contain special * characters. */ int nocase) /* 0 for case sensitive, 1 for insensitive */ { Tcl_UniChar ch1, p; while (1) { p = *uniPattern; /* * See if we're at the end of both the pattern and the string. If so, * we succeeded. If we're at the end of the pattern but not at the end * of the string, we failed. */ if (p == 0) { return (*uniStr == 0); } if ((*uniStr == 0) && (p != '*')) { return 0; } /* * Check for a "*" as the next pattern character. It matches any * substring. We handle this by skipping all the characters up to the * next matching one in the pattern, and then calling ourselves * recursively for each postfix of string, until either we match or we * reach the end of the string. */ if (p == '*') { /* * Skip all successive *'s in the pattern */ while (*(++uniPattern) == '*') { /* empty body */ } p = *uniPattern; if (p == 0) { return 1; } if (nocase) { p = Tcl_UniCharToLower(p); } while (1) { /* * Optimization for matching - cruise through the string * quickly if the next char in the pattern isn't a special * character */ if ((p != '[') && (p != '?') && (p != '\\')) { if (nocase) { while (*uniStr && (p != *uniStr) && (p != Tcl_UniCharToLower(*uniStr))) { uniStr++; } } else { while (*uniStr && (p != *uniStr)) { uniStr++; } } } if (Tcl_UniCharCaseMatch(uniStr, uniPattern, nocase)) { return 1; } if (*uniStr == 0) { return 0; } uniStr++; } } /* * Check for a "?" as the next pattern character. It matches any * single character. */ if (p == '?') { uniPattern++; uniStr++; continue; } /* * Check for a "[" as the next pattern character. It is followed by a * list of characters that are acceptable, or by a range (two * characters separated by "-"). */ if (p == '[') { Tcl_UniChar startChar, endChar; uniPattern++; ch1 = (nocase ? Tcl_UniCharToLower(*uniStr) : *uniStr); uniStr++; while (1) { if ((*uniPattern == ']') || (*uniPattern == 0)) { return 0; } startChar = (nocase ? Tcl_UniCharToLower(*uniPattern) : *uniPattern); uniPattern++; if (*uniPattern == '-') { uniPattern++; if (*uniPattern == 0) { return 0; } endChar = (nocase ? Tcl_UniCharToLower(*uniPattern) : *uniPattern); uniPattern++; if (((startChar <= ch1) && (ch1 <= endChar)) || ((endChar <= ch1) && (ch1 <= startChar))) { /* * Matches ranges of form [a-z] or [z-a]. */ break; } } else if (startChar == ch1) { break; } } while (*uniPattern != ']') { if (*uniPattern == 0) { uniPattern--; break; } uniPattern++; } uniPattern++; continue; } /* * If the next pattern character is '\', just strip off the '\' so we * do exact matching on the character that follows. */ if (p == '\\') { if (*(++uniPattern) == '\0') { return 0; } } /* * There's no special character. Just make sure that the next bytes of * each string match. */ if (nocase) { if (Tcl_UniCharToLower(*uniStr) != Tcl_UniCharToLower(*uniPattern)) { return 0; } } else if (*uniStr != *uniPattern) { return 0; } uniStr++; uniPattern++; } }  /* *---------------------------------------------------------------------- * * TclUniCharMatch -- * * See if a particular Unicode string matches a particular pattern. * Allows case insensitivity. This is the Unicode equivalent of the char* * Tcl_StringCaseMatch. This variant of Tcl_UniCharCaseMatch uses counted * Strings, so embedded NULLs are allowed. * * Results: * The return value is 1 if string matches pattern, and 0 otherwise. The * matching operation permits the following special characters in the * pattern: *?\[] (see the manual entry for details on what these mean). * * Side effects: * None. * *---------------------------------------------------------------------- */ int TclUniCharMatch( CONST Tcl_UniChar *string, /* Unicode String. */ int strLen, /* Length of String */ CONST Tcl_UniChar *pattern, /* Pattern, which may contain special * characters. */ int ptnLen, /* Length of Pattern */ int nocase) /* 0 for case sensitive, 1 for insensitive */ { CONST Tcl_UniChar *stringEnd, *patternEnd; Tcl_UniChar p; stringEnd = string + strLen; patternEnd = pattern + ptnLen; while (1) { /* * See if we're at the end of both the pattern and the string. If so, * we succeeded. If we're at the end of the pattern but not at the end * of the string, we failed. */ if (pattern == patternEnd) { return (string == stringEnd); } p = *pattern; if ((string == stringEnd) && (p != '*')) { return 0; } /* * Check for a "*" as the next pattern character. It matches any * substring. We handle this by skipping all the characters up to the * next matching one in the pattern, and then calling ourselves * recursively for each postfix of string, until either we match or we * reach the end of the string. */ if (p == '*') { /* * Skip all successive *'s in the pattern. */ while (*(++pattern) == '*') { /* empty body */ } if (pattern == patternEnd) { return 1; } p = *pattern; if (nocase) { p = Tcl_UniCharToLower(p); } while (1) { /* * Optimization for matching - cruise through the string * quickly if the next char in the pattern isn't a special * character. */ if ((p != '[') && (p != '?') && (p != '\\')) { if (nocase) { while ((string < stringEnd) && (p != *string) && (p != Tcl_UniCharToLower(*string))) { string++; } } else { while ((string < stringEnd) && (p != *string)) { string++; } } } if (TclUniCharMatch(string, stringEnd - string, pattern, patternEnd - pattern, nocase)) { return 1; } if (string == stringEnd) { return 0; } string++; } } /* * Check for a "?" as the next pattern character. It matches any * single character. */ if (p == '?') { pattern++; string++; continue; } /* * Check for a "[" as the next pattern character. It is followed by a * list of characters that are acceptable, or by a range (two * characters separated by "-"). */ if (p == '[') { Tcl_UniChar ch1, startChar, endChar; pattern++; ch1 = (nocase ? Tcl_UniCharToLower(*string) : *string); string++; while (1) { if ((*pattern == ']') || (pattern == patternEnd)) { return 0; } startChar = (nocase ? Tcl_UniCharToLower(*pattern) : *pattern); pattern++; if (*pattern == '-') { pattern++; if (pattern == patternEnd) { return 0; } endChar = (nocase ? Tcl_UniCharToLower(*pattern) : *pattern); pattern++; if (((startChar <= ch1) && (ch1 <= endChar)) || ((endChar <= ch1) && (ch1 <= startChar))) { /* * Matches ranges of form [a-z] or [z-a]. */ break; } } else if (startChar == ch1) { break; } } while (*pattern != ']') { if (pattern == patternEnd) { pattern--; break; } pattern++; } pattern++; continue; } /* * If the next pattern character is '\', just strip off the '\' so we * do exact matching on the character that follows. */ if (p == '\\') { if (++pattern == patternEnd) { return 0; } } /* * There's no special character. Just make sure that the next bytes of * each string match. */ if (nocase) { if (Tcl_UniCharToLower(*string) != Tcl_UniCharToLower(*pattern)) { return 0; } } else if (*string != *pattern) { return 0; } string++; pattern++; } }  /* * Local Variables: * mode: c * c-basic-offset: 4 * fill-column: 78 * End: */

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