/*****************************************************************************\
* *
-* Name : utf_conversion *
-* Author : Unicode, Inc. (C conversion functions) *
-* Author : Chris Koeritz (C++ conversion classes) *
-* *
-*******************************************************************************
-* Copyright (c) 2006-$now By Author. This program is free software; you can *
-* redistribute it and/or modify it under the terms of the GNU General Public *
-* License as published by the Free Software Foundation; either version 2 of *
-* the License or (at your option) any later version. This is online at: *
-* http://www.fsf.org/copyleft/gpl.html *
-* Please send any updates to: fred@gruntose.com *
-\*****************************************************************************/
+ * Name : utf_conversion *
+ * Author : Unicode, Inc. (C conversion functions) *
+ * Author : Chris Koeritz (C++ conversion classes) *
+ * *
+ *******************************************************************************
+ * Copyright (c) 2006-$now By Author. This program is free software; you can *
+ * redistribute it and/or modify it under the terms of the GNU General Public *
+ * License as published by the Free Software Foundation; either version 2 of *
+ * the License or (at your option) any later version. This is online at: *
+ * http://www.fsf.org/copyleft/gpl.html *
+ * Please send any updates to: fred@gruntose.com *
+ \*****************************************************************************/
//copyright below is relevant to UTF conversion methods only.
/*
/* ---------------------------------------------------------------------
- Conversions between UTF32, UTF-16, and UTF-8. Source code file.
- Author: Mark E. Davis, 1994.
- Rev History: Rick McGowan, fixes & updates May 2001.
- Sept 2001: fixed const & error conditions per
- mods suggested by S. Parent & A. Lillich.
- June 2002: Tim Dodd added detection and handling of incomplete
- source sequences, enhanced error detection, added casts
- to eliminate compiler warnings.
- July 2003: slight mods to back out aggressive FFFE detection.
- Jan 2004: updated switches in from-UTF8 conversions.
- Oct 2004: updated to use UNI_MAX_LEGAL_UTF32 in UTF-32 conversions.
+ Conversions between UTF32, UTF-16, and UTF-8. Source code file.
+ Author: Mark E. Davis, 1994.
+ Rev History: Rick McGowan, fixes & updates May 2001.
+ Sept 2001: fixed const & error conditions per
+ mods suggested by S. Parent & A. Lillich.
+ June 2002: Tim Dodd added detection and handling of incomplete
+ source sequences, enhanced error detection, added casts
+ to eliminate compiler warnings.
+ July 2003: slight mods to back out aggressive FFFE detection.
+ Jan 2004: updated switches in from-UTF8 conversions.
+ Oct 2004: updated to use UNI_MAX_LEGAL_UTF32 in UTF-32 conversions.
- See the header file "ConvertUTF.h" for complete documentation.
+ See the header file "ConvertUTF.h" for complete documentation.
------------------------------------------------------------------------- */
+ ------------------------------------------------------------------------ */
#include "astring.h"
#include "utf_conversion.h"
#include <string.h>
#include <wchar.h>
#ifdef CVTUTF_DEBUG
- #include <stdio.h>
+#include <stdio.h>
#endif
namespace basis {
-static const int halfShift = 10; /* used for shifting by 10 bits */
+ static const int halfShift = 10; /* used for shifting by 10 bits */
-static const UTF32 halfBase = 0x0010000UL;
-static const UTF32 halfMask = 0x3FFUL;
+ static const UTF32 halfBase = 0x0010000UL;
+ static const UTF32 halfMask = 0x3FFUL;
#define UNI_SUR_HIGH_START (UTF32)0xD800
#define UNI_SUR_HIGH_END (UTF32)0xDBFF
#define UNI_SUR_LOW_START (UTF32)0xDC00
#define UNI_SUR_LOW_END (UTF32)0xDFFF
-/* --------------------------------------------------------------------- */
-
-ConversionResult ConvertUTF32toUTF16 (
- const UTF32** sourceStart, const UTF32* sourceEnd,
- UTF16** targetStart, UTF16* targetEnd, ConversionFlags flags) {
- ConversionResult result = conversionOK;
- const UTF32* source = *sourceStart;
- UTF16* target = *targetStart;
- while (source < sourceEnd) {
- UTF32 ch;
- if (target >= targetEnd) {
- result = targetExhausted; break;
- }
- ch = *source++;
- if (ch <= UNI_MAX_BMP) { /* Target is a character <= 0xFFFF */
- /* UTF-16 surrogate values are illegal in UTF-32; 0xffff or 0xfffe are both reserved values */
- if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_LOW_END) {
- if (flags == strictConversion) {
- --source; /* return to the illegal value itself */
- result = sourceIllegal;
- break;
- } else {
- *target++ = UNI_REPLACEMENT_CHAR;
- }
- } else {
- *target++ = (UTF16)ch; /* normal case */
- }
- } else if (ch > UNI_MAX_LEGAL_UTF32) {
- if (flags == strictConversion) {
- result = sourceIllegal;
- } else {
- *target++ = UNI_REPLACEMENT_CHAR;
- }
- } else {
- /* target is a character in range 0xFFFF - 0x10FFFF. */
- if (target + 1 >= targetEnd) {
- --source; /* Back up source pointer! */
- result = targetExhausted; break;
- }
- ch -= halfBase;
- *target++ = (UTF16)((ch >> halfShift) + UNI_SUR_HIGH_START);
- *target++ = (UTF16)((ch & halfMask) + UNI_SUR_LOW_START);
- }
- }
- *sourceStart = source;
- *targetStart = target;
- return result;
-}
-
-/* --------------------------------------------------------------------- */
-
-ConversionResult ConvertUTF16toUTF32 (
- const UTF16** sourceStart, const UTF16* sourceEnd,
- UTF32** targetStart, UTF32* targetEnd, ConversionFlags flags) {
- ConversionResult result = conversionOK;
- const UTF16* source = *sourceStart;
- UTF32* target = *targetStart;
- UTF32 ch, ch2;
- while (source < sourceEnd) {
- const UTF16* oldSource = source; /* In case we have to back up because of target overflow. */
- ch = *source++;
- /* If we have a surrogate pair, convert to UTF32 first. */
- if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_HIGH_END) {
- /* If the 16 bits following the high surrogate are in the source buffer... */
- if (source < sourceEnd) {
- ch2 = *source;
- /* If it's a low surrogate, convert to UTF32. */
- if (ch2 >= UNI_SUR_LOW_START && ch2 <= UNI_SUR_LOW_END) {
- ch = ((ch - UNI_SUR_HIGH_START) << halfShift)
- + (ch2 - UNI_SUR_LOW_START) + halfBase;
- ++source;
- } else if (flags == strictConversion) { /* it's an unpaired high surrogate */
- --source; /* return to the illegal value itself */
- result = sourceIllegal;
- break;
- }
- } else { /* We don't have the 16 bits following the high surrogate. */
- --source; /* return to the high surrogate */
- result = sourceExhausted;
- break;
- }
- } else if (flags == strictConversion) {
- /* UTF-16 surrogate values are illegal in UTF-32 */
- if (ch >= UNI_SUR_LOW_START && ch <= UNI_SUR_LOW_END) {
- --source; /* return to the illegal value itself */
- result = sourceIllegal;
- break;
- }
- }
- if (target >= targetEnd) {
- source = oldSource; /* Back up source pointer! */
- result = targetExhausted; break;
- }
- *target++ = ch;
- }
- *sourceStart = source;
- *targetStart = target;
+ /* --------------------------------------------------------------------- */
+
+ ConversionResult ConvertUTF32toUTF16(const UTF32** sourceStart, const UTF32* sourceEnd,
+ UTF16** targetStart, UTF16* targetEnd, ConversionFlags flags)
+ {
+ ConversionResult result = conversionOK;
+ const UTF32* source = *sourceStart;
+ UTF16* target = *targetStart;
+ while (source < sourceEnd) {
+ UTF32 ch;
+ if (target >= targetEnd) {
+ result = targetExhausted;
+ break;
+ }
+ ch = *source++;
+ if (ch <= UNI_MAX_BMP) { /* Target is a character <= 0xFFFF */
+ /* UTF-16 surrogate values are illegal in UTF-32; 0xffff or 0xfffe are both reserved values */
+ if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_LOW_END) {
+ if (flags == strictConversion) {
+ --source; /* return to the illegal value itself */
+ result = sourceIllegal;
+ break;
+ } else {
+ *target++ = UNI_REPLACEMENT_CHAR;
+ }
+ } else {
+ *target++ = (UTF16)ch; /* normal case */
+ }
+ } else if (ch > UNI_MAX_LEGAL_UTF32) {
+ if (flags == strictConversion) {
+ result = sourceIllegal;
+ } else {
+ *target++ = UNI_REPLACEMENT_CHAR;
+ }
+ } else {
+ /* target is a character in range 0xFFFF - 0x10FFFF. */
+ if (target + 1 >= targetEnd) {
+ --source; /* Back up source pointer! */
+ result = targetExhausted;
+ break;
+ }
+ ch -= halfBase;
+ *target++ = (UTF16)((ch >> halfShift) + UNI_SUR_HIGH_START );
+ *target++ = (UTF16)((ch & halfMask) + UNI_SUR_LOW_START );
+ }
+ }
+ *sourceStart = source;
+ *targetStart = target;
+ return result;
+ }
+
+ /* --------------------------------------------------------------------- */
+
+ ConversionResult ConvertUTF16toUTF32(const UTF16** sourceStart, const UTF16* sourceEnd,
+ UTF32** targetStart, UTF32* targetEnd, ConversionFlags flags)
+ {
+ ConversionResult result = conversionOK;
+ const UTF16* source = *sourceStart;
+ UTF32* target = *targetStart;
+ UTF32 ch, ch2;
+ while (source < sourceEnd) {
+ const UTF16* oldSource = source; /* In case we have to back up because of target overflow. */
+ ch = *source++;
+ /* If we have a surrogate pair, convert to UTF32 first. */
+ if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_HIGH_END) {
+ /* If the 16 bits following the high surrogate are in the source buffer... */
+ if (source < sourceEnd) {
+ ch2 = *source;
+ /* If it's a low surrogate, convert to UTF32. */
+ if (ch2 >= UNI_SUR_LOW_START && ch2 <= UNI_SUR_LOW_END) {
+ ch = ((ch - UNI_SUR_HIGH_START ) << halfShift) + (ch2 - UNI_SUR_LOW_START )
+ + halfBase;
+ ++source;
+ } else if (flags == strictConversion) { /* it's an unpaired high surrogate */
+ --source; /* return to the illegal value itself */
+ result = sourceIllegal;
+ break;
+ }
+ } else { /* We don't have the 16 bits following the high surrogate. */
+ --source; /* return to the high surrogate */
+ result = sourceExhausted;
+ break;
+ }
+ } else if (flags == strictConversion) {
+ /* UTF-16 surrogate values are illegal in UTF-32 */
+ if (ch >= UNI_SUR_LOW_START && ch <= UNI_SUR_LOW_END) {
+ --source; /* return to the illegal value itself */
+ result = sourceIllegal;
+ break;
+ }
+ }
+ if (target >= targetEnd) {
+ source = oldSource; /* Back up source pointer! */
+ result = targetExhausted;
+ break;
+ }
+ *target++ = ch;
+ }
+ *sourceStart = source;
+ *targetStart = target;
#ifdef CVTUTF_DEBUG
-if (result == sourceIllegal) {
- fprintf(stderr, "ConvertUTF16toUTF32 illegal seq 0x%04x,%04x\n", ch, ch2);
- fflush(stderr);
-}
+ if (result == sourceIllegal) {
+ fprintf(stderr, "ConvertUTF16toUTF32 illegal seq 0x%04x,%04x\n", ch, ch2);
+ fflush(stderr);
+ }
#endif
- return result;
-}
-
-/* --------------------------------------------------------------------- */
-
-/*
- * Index into the table below with the first byte of a UTF-8 sequence to
- * get the number of trailing bytes that are supposed to follow it.
- * Note that *legal* UTF-8 values can't have 4 or 5-bytes. The table is
- * left as-is for anyone who may want to do such conversion, which was
- * allowed in earlier algorithms.
- */
-static const char trailingBytesForUTF8[256] = {
- 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
- 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
- 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
- 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
- 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
- 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
- 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, 3,3,3,3,3,3,3,3,4,4,4,4,5,5,5,5
-};
-
-/*
- * Magic values subtracted from a buffer value during UTF8 conversion.
- * This table contains as many values as there might be trailing bytes
- * in a UTF-8 sequence.
- */
-static const UTF32 offsetsFromUTF8[6] = { 0x00000000UL, 0x00003080UL, 0x000E2080UL,
- 0x03C82080UL, 0xFA082080UL, 0x82082080UL };
-
-/*
- * Once the bits are split out into bytes of UTF-8, this is a mask OR-ed
- * into the first byte, depending on how many bytes follow. There are
- * as many entries in this table as there are UTF-8 sequence types.
- * (I.e., one byte sequence, two byte... etc.). Remember that sequencs
- * for *legal* UTF-8 will be 4 or fewer bytes total.
- */
-static const UTF8 firstByteMark[7] = { 0x00, 0x00, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC };
-
-/* --------------------------------------------------------------------- */
-
-/* The interface converts a whole buffer to avoid function-call overhead.
- * Constants have been gathered. Loops & conditionals have been removed as
- * much as possible for efficiency, in favor of drop-through switches.
- * (See "Note A" at the bottom of the file for equivalent code.)
- * If your compiler supports it, the "isLegalUTF8" call can be turned
- * into an inline function.
- */
-
-/* --------------------------------------------------------------------- */
-
-ConversionResult ConvertUTF16toUTF8 (
- const UTF16** sourceStart, const UTF16* sourceEnd,
- UTF8** targetStart, UTF8* targetEnd, ConversionFlags flags) {
- ConversionResult result = conversionOK;
- const UTF16* source = *sourceStart;
- UTF8* target = *targetStart;
- while (source < sourceEnd) {
- UTF32 ch;
- unsigned short bytesToWrite = 0;
- const UTF32 byteMask = 0xBF;
- const UTF32 byteMark = 0x80;
- const UTF16* oldSource = source; /* In case we have to back up because of target overflow. */
- ch = *source++;
- /* If we have a surrogate pair, convert to UTF32 first. */
- if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_HIGH_END) {
- /* If the 16 bits following the high surrogate are in the source buffer... */
- if (source < sourceEnd) {
- UTF32 ch2 = *source;
- /* If it's a low surrogate, convert to UTF32. */
- if (ch2 >= UNI_SUR_LOW_START && ch2 <= UNI_SUR_LOW_END) {
- ch = ((ch - UNI_SUR_HIGH_START) << halfShift)
- + (ch2 - UNI_SUR_LOW_START) + halfBase;
- ++source;
- } else if (flags == strictConversion) { /* it's an unpaired high surrogate */
- --source; /* return to the illegal value itself */
- result = sourceIllegal;
- break;
- }
- } else { /* We don't have the 16 bits following the high surrogate. */
- --source; /* return to the high surrogate */
- result = sourceExhausted;
- break;
- }
- } else if (flags == strictConversion) {
- /* UTF-16 surrogate values are illegal in UTF-32 */
- if (ch >= UNI_SUR_LOW_START && ch <= UNI_SUR_LOW_END) {
- --source; /* return to the illegal value itself */
- result = sourceIllegal;
- break;
- }
- }
- /* Figure out how many bytes the result will require */
- if (ch < (UTF32)0x80) { bytesToWrite = 1;
- } else if (ch < (UTF32)0x800) { bytesToWrite = 2;
- } else if (ch < (UTF32)0x10000) { bytesToWrite = 3;
- } else if (ch < (UTF32)0x110000) { bytesToWrite = 4;
- } else { bytesToWrite = 3;
- ch = UNI_REPLACEMENT_CHAR;
- }
-
- target += bytesToWrite;
- if (target > targetEnd) {
- source = oldSource; /* Back up source pointer! */
- target -= bytesToWrite; result = targetExhausted; break;
- }
- switch (bytesToWrite) { /* note: everything falls through. */
- case 4: *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6;
- case 3: *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6;
- case 2: *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6;
- case 1: *--target = (UTF8)(ch | firstByteMark[bytesToWrite]);
- }
- target += bytesToWrite;
- }
- *sourceStart = source;
- *targetStart = target;
- return result;
-}
-
-/* --------------------------------------------------------------------- */
-
-/*
- * Utility routine to tell whether a sequence of bytes is legal UTF-8.
- * This must be called with the length pre-determined by the first byte.
- * If not calling this from ConvertUTF8to*, then the length can be set by:
- * length = trailingBytesForUTF8[*source]+1;
- * and the sequence is illegal right away if there aren't that many bytes
- * available.
- * If presented with a length > 4, this returns false. The Unicode
- * definition of UTF-8 goes up to 4-byte sequences.
- */
-
-static Booleano isLegalUTF8(const UTF8 *source, int length) {
- UTF8 a;
- const UTF8 *srcptr = source+length;
- switch (length) {
- default: return false;
- /* Everything else falls through when "true"... */
- case 4: if ((a = (*--srcptr)) < 0x80 || a > 0xBF) return false;
- case 3: if ((a = (*--srcptr)) < 0x80 || a > 0xBF) return false;
- case 2: if ((a = (*--srcptr)) > 0xBF) return false;
-
- switch (*source) {
- /* no fall-through in this inner switch */
- case 0xE0: if (a < 0xA0) return false; break;
- case 0xED: if (a > 0x9F) return false; break;
- case 0xF0: if (a < 0x90) return false; break;
- case 0xF4: if (a > 0x8F) return false; break;
- default: if (a < 0x80) return false;
- }
-
- case 1: if (*source >= 0x80 && *source < 0xC2) return false;
- }
- if (*source > 0xF4) return false;
- return true;
-}
-
-/* --------------------------------------------------------------------- */
-
-/*
- * Exported function to return whether a UTF-8 sequence is legal or not.
- * This is not used here; it's just exported.
- */
-Booleano isLegalUTF8Sequence(const UTF8 *source, const UTF8 *sourceEnd) {
- int length = trailingBytesForUTF8[*source]+1;
- if (source+length > sourceEnd) {
- return false;
- }
- return isLegalUTF8(source, length);
-}
-
-/* --------------------------------------------------------------------- */
-
-ConversionResult ConvertUTF8toUTF16 (
- const UTF8** sourceStart, const UTF8* sourceEnd,
- UTF16** targetStart, UTF16* targetEnd, ConversionFlags flags) {
- ConversionResult result = conversionOK;
- const UTF8* source = *sourceStart;
- UTF16* target = *targetStart;
- while (source < sourceEnd) {
- UTF32 ch = 0;
- unsigned short extraBytesToRead = trailingBytesForUTF8[*source];
- if (source + extraBytesToRead >= sourceEnd) {
- result = sourceExhausted; break;
- }
- /* Do this check whether lenient or strict */
- if (! isLegalUTF8(source, extraBytesToRead+1)) {
- result = sourceIllegal;
- break;
- }
- /*
- * The cases all fall through. See "Note A" below.
- */
- switch (extraBytesToRead) {
- case 5: ch += *source++; ch <<= 6; /* remember, illegal UTF-8 */
- case 4: ch += *source++; ch <<= 6; /* remember, illegal UTF-8 */
- case 3: ch += *source++; ch <<= 6;
- case 2: ch += *source++; ch <<= 6;
- case 1: ch += *source++; ch <<= 6;
- case 0: ch += *source++;
- }
- ch -= offsetsFromUTF8[extraBytesToRead];
-
- if (target >= targetEnd) {
- source -= (extraBytesToRead+1); /* Back up source pointer! */
- result = targetExhausted; break;
- }
- if (ch <= UNI_MAX_BMP) { /* Target is a character <= 0xFFFF */
- /* UTF-16 surrogate values are illegal in UTF-32 */
- if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_LOW_END) {
- if (flags == strictConversion) {
- source -= (extraBytesToRead+1); /* return to the illegal value itself */
- result = sourceIllegal;
- break;
- } else {
- *target++ = UNI_REPLACEMENT_CHAR;
- }
- } else {
- *target++ = (UTF16)ch; /* normal case */
- }
- } else if (ch > UNI_MAX_UTF16) {
- if (flags == strictConversion) {
- result = sourceIllegal;
- source -= (extraBytesToRead+1); /* return to the start */
- break; /* Bail out; shouldn't continue */
- } else {
- *target++ = UNI_REPLACEMENT_CHAR;
- }
- } else {
- /* target is a character in range 0xFFFF - 0x10FFFF. */
- if (target + 1 >= targetEnd) {
- source -= (extraBytesToRead+1); /* Back up source pointer! */
- result = targetExhausted; break;
- }
- ch -= halfBase;
- *target++ = (UTF16)((ch >> halfShift) + UNI_SUR_HIGH_START);
- *target++ = (UTF16)((ch & halfMask) + UNI_SUR_LOW_START);
- }
- }
- *sourceStart = source;
- *targetStart = target;
- return result;
-}
-
-/* --------------------------------------------------------------------- */
-
-ConversionResult ConvertUTF32toUTF8 (
- const UTF32** sourceStart, const UTF32* sourceEnd,
- UTF8** targetStart, UTF8* targetEnd, ConversionFlags flags) {
- ConversionResult result = conversionOK;
- const UTF32* source = *sourceStart;
- UTF8* target = *targetStart;
- while (source < sourceEnd) {
- UTF32 ch;
- unsigned short bytesToWrite = 0;
- const UTF32 byteMask = 0xBF;
- const UTF32 byteMark = 0x80;
- ch = *source++;
- if (flags == strictConversion ) {
- /* UTF-16 surrogate values are illegal in UTF-32 */
- if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_LOW_END) {
- --source; /* return to the illegal value itself */
- result = sourceIllegal;
- break;
- }
- }
- /*
- * Figure out how many bytes the result will require. Turn any
- * illegally large UTF32 things (> Plane 17) into replacement chars.
- */
- if (ch < (UTF32)0x80) { bytesToWrite = 1;
- } else if (ch < (UTF32)0x800) { bytesToWrite = 2;
- } else if (ch < (UTF32)0x10000) { bytesToWrite = 3;
- } else if (ch <= UNI_MAX_LEGAL_UTF32) { bytesToWrite = 4;
- } else { bytesToWrite = 3;
- ch = UNI_REPLACEMENT_CHAR;
- result = sourceIllegal;
- }
-
- target += bytesToWrite;
- if (target > targetEnd) {
- --source; /* Back up source pointer! */
- target -= bytesToWrite; result = targetExhausted; break;
- }
- switch (bytesToWrite) { /* note: everything falls through. */
- case 4: *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6;
- case 3: *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6;
- case 2: *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6;
- case 1: *--target = (UTF8) (ch | firstByteMark[bytesToWrite]);
- }
- target += bytesToWrite;
- }
- *sourceStart = source;
- *targetStart = target;
- return result;
-}
-
-/* --------------------------------------------------------------------- */
-
-ConversionResult ConvertUTF8toUTF32 (
- const UTF8** sourceStart, const UTF8* sourceEnd,
- UTF32** targetStart, UTF32* targetEnd, ConversionFlags flags) {
- ConversionResult result = conversionOK;
- const UTF8* source = *sourceStart;
- UTF32* target = *targetStart;
- while (source < sourceEnd) {
- UTF32 ch = 0;
- unsigned short extraBytesToRead = trailingBytesForUTF8[*source];
- if (source + extraBytesToRead >= sourceEnd) {
- result = sourceExhausted; break;
- }
- /* Do this check whether lenient or strict */
- if (! isLegalUTF8(source, extraBytesToRead+1)) {
- result = sourceIllegal;
- break;
- }
- /*
- * The cases all fall through. See "Note A" below.
- */
- switch (extraBytesToRead) {
- case 5: ch += *source++; ch <<= 6;
- case 4: ch += *source++; ch <<= 6;
- case 3: ch += *source++; ch <<= 6;
- case 2: ch += *source++; ch <<= 6;
- case 1: ch += *source++; ch <<= 6;
- case 0: ch += *source++;
- }
- ch -= offsetsFromUTF8[extraBytesToRead];
-
- if (target >= targetEnd) {
- source -= (extraBytesToRead+1); /* Back up the source pointer! */
- result = targetExhausted; break;
- }
- if (ch <= UNI_MAX_LEGAL_UTF32) {
- /*
- * UTF-16 surrogate values are illegal in UTF-32, and anything
- * over Plane 17 (> 0x10FFFF) is illegal.
- */
- if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_LOW_END) {
- if (flags == strictConversion) {
- source -= (extraBytesToRead+1); /* return to the illegal value itself */
- result = sourceIllegal;
- break;
- } else {
- *target++ = UNI_REPLACEMENT_CHAR;
- }
- } else {
- *target++ = ch;
- }
- } else { /* i.e., ch > UNI_MAX_LEGAL_UTF32 */
- result = sourceIllegal;
- *target++ = UNI_REPLACEMENT_CHAR;
- }
- }
- *sourceStart = source;
- *targetStart = target;
- return result;
-}
-
-/* ---------------------------------------------------------------------
-
- Note A.
- The fall-through switches in UTF-8 reading code save a
- temp variable, some decrements & conditionals. The switches
- are equivalent to the following loop:
- {
- int tmpBytesToRead = extraBytesToRead+1;
- do {
- ch += *source++;
- --tmpBytesToRead;
- if (tmpBytesToRead) ch <<= 6;
- } while (tmpBytesToRead > 0);
- }
- In UTF-8 writing code, the switches on "bytesToWrite" are
- similarly unrolled loops.
-
- --------------------------------------------------------------------- */
+ return result;
+ }
+
+ /* --------------------------------------------------------------------- */
+
+ /*
+ * Index into the table below with the first byte of a UTF-8 sequence to
+ * get the number of trailing bytes that are supposed to follow it.
+ * Note that *legal* UTF-8 values can't have 4 or 5-bytes. The table is
+ * left as-is for anyone who may want to do such conversion, which was
+ * allowed in earlier algorithms.
+ */
+ static const char trailingBytesForUTF8[256] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 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, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5 };
+
+ /*
+ * Magic values subtracted from a buffer value during UTF8 conversion.
+ * This table contains as many values as there might be trailing bytes
+ * in a UTF-8 sequence.
+ */
+ static const UTF32 offsetsFromUTF8[6] = { 0x00000000UL, 0x00003080UL, 0x000E2080UL,
+ 0x03C82080UL, 0xFA082080UL, 0x82082080UL };
+
+ /*
+ * Once the bits are split out into bytes of UTF-8, this is a mask OR-ed
+ * into the first byte, depending on how many bytes follow. There are
+ * as many entries in this table as there are UTF-8 sequence types.
+ * (I.e., one byte sequence, two byte... etc.). Remember that sequencs
+ * for *legal* UTF-8 will be 4 or fewer bytes total.
+ */
+ static const UTF8 firstByteMark[7] = { 0x00, 0x00, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC };
+
+ /* --------------------------------------------------------------------- */
+
+ /* The interface converts a whole buffer to avoid function-call overhead.
+ * Constants have been gathered. Loops & conditionals have been removed as
+ * much as possible for efficiency, in favor of drop-through switches.
+ * (See "Note A" at the bottom of the file for equivalent code.)
+ * If your compiler supports it, the "isLegalUTF8" call can be turned
+ * into an inline function.
+ */
+
+ /* --------------------------------------------------------------------- */
+
+ ConversionResult ConvertUTF16toUTF8(const UTF16** sourceStart, const UTF16* sourceEnd,
+ UTF8** targetStart, UTF8* targetEnd, ConversionFlags flags)
+ {
+ ConversionResult result = conversionOK;
+ const UTF16* source = *sourceStart;
+ UTF8* target = *targetStart;
+ while (source < sourceEnd) {
+ UTF32 ch;
+ unsigned short bytesToWrite = 0;
+ const UTF32 byteMask = 0xBF;
+ const UTF32 byteMark = 0x80;
+ const UTF16* oldSource = source; /* In case we have to back up because of target overflow. */
+ ch = *source++;
+ /* If we have a surrogate pair, convert to UTF32 first. */
+ if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_HIGH_END) {
+ /* If the 16 bits following the high surrogate are in the source buffer... */
+ if (source < sourceEnd) {
+ UTF32 ch2 = *source;
+ /* If it's a low surrogate, convert to UTF32. */
+ if (ch2 >= UNI_SUR_LOW_START && ch2 <= UNI_SUR_LOW_END) {
+ ch = ((ch - UNI_SUR_HIGH_START ) << halfShift) + (ch2 - UNI_SUR_LOW_START )
+ + halfBase;
+ ++source;
+ } else if (flags == strictConversion) { /* it's an unpaired high surrogate */
+ --source; /* return to the illegal value itself */
+ result = sourceIllegal;
+ break;
+ }
+ } else { /* We don't have the 16 bits following the high surrogate. */
+ --source; /* return to the high surrogate */
+ result = sourceExhausted;
+ break;
+ }
+ } else if (flags == strictConversion) {
+ /* UTF-16 surrogate values are illegal in UTF-32 */
+ if (ch >= UNI_SUR_LOW_START && ch <= UNI_SUR_LOW_END) {
+ --source; /* return to the illegal value itself */
+ result = sourceIllegal;
+ break;
+ }
+ }
+ /* Figure out how many bytes the result will require */
+ if (ch < (UTF32)0x80) {
+ bytesToWrite = 1;
+ } else if (ch < (UTF32)0x800) {
+ bytesToWrite = 2;
+ } else if (ch < (UTF32)0x10000) {
+ bytesToWrite = 3;
+ } else if (ch < (UTF32)0x110000) {
+ bytesToWrite = 4;
+ } else {
+ bytesToWrite = 3;
+ ch = UNI_REPLACEMENT_CHAR;
+ }
+
+ target += bytesToWrite;
+ if (target > targetEnd) {
+ source = oldSource; /* Back up source pointer! */
+ target -= bytesToWrite;
+ result = targetExhausted;
+ break;
+ }
+ switch (bytesToWrite) { /* note: everything falls through. */
+ case 4:
+ *--target = (UTF8)((ch | byteMark) & byteMask);
+ ch >>= 6;
+ // no break
+ case 3:
+ *--target = (UTF8)((ch | byteMark) & byteMask);
+ ch >>= 6;
+ // no break.
+ case 2:
+ *--target = (UTF8)((ch | byteMark) & byteMask);
+ ch >>= 6;
+ // no break.
+ case 1:
+ *--target = (UTF8)(ch | firstByteMark[bytesToWrite]);
+ // no break.
+ }
+ target += bytesToWrite;
+ }
+ *sourceStart = source;
+ *targetStart = target;
+ return result;
+ }
+
+ /* --------------------------------------------------------------------- */
+
+ /*
+ * Utility routine to tell whether a sequence of bytes is legal UTF-8.
+ * This must be called with the length pre-determined by the first byte.
+ * If not calling this from ConvertUTF8to*, then the length can be set by:
+ * length = trailingBytesForUTF8[*source]+1;
+ * and the sequence is illegal right away if there aren't that many bytes
+ * available.
+ * If presented with a length > 4, this returns false. The Unicode
+ * definition of UTF-8 goes up to 4-byte sequences.
+ */
+
+ static Booleano isLegalUTF8(const UTF8 *source, int length)
+ {
+ UTF8 a;
+ const UTF8 *srcptr = source + length;
+ switch (length) {
+ /* Everything else falls through when "true"... */
+ case 4: {
+ if ((a = (*--srcptr)) < 0x80 || a > 0xBF) return false;
+ }
+ /* no break */
+ case 3: {
+ if ((a = (*--srcptr)) < 0x80 || a > 0xBF) return false;
+ }
+ /* no break */
+ case 2: {
+ if ((a = (*--srcptr)) > 0xBF) return false;
+
+ switch (*source) {
+ /* no fall-through in this inner switch */
+ case 0xE0:
+ if (a < 0xA0) return false;
+ break;
+ case 0xED:
+ if (a > 0x9F) return false;
+ break;
+ case 0xF0:
+ if (a < 0x90) return false;
+ break;
+ case 0xF4:
+ if (a > 0x8F) return false;
+ break;
+ default:
+ if (a < 0x80) return false;
+ break;
+ }
+ }
+ /* no break */
+ case 1: {
+ if (*source >= 0x80 && *source < 0xC2) return false;
+ }
+ /* no break */
+ default: {
+ return false;
+ }
+ }
+ if (*source > 0xF4) return false;
+ return true;
+ }
+
+ /* --------------------------------------------------------------------- */
+
+ /*
+ * Exported function to return whether a UTF-8 sequence is legal or not.
+ * This is not used here; it's just exported.
+ */
+ Booleano isLegalUTF8Sequence(const UTF8 *source, const UTF8 *sourceEnd)
+ {
+ int length = trailingBytesForUTF8[*source] + 1;
+ if (source + length > sourceEnd) {
+ return false;
+ }
+ return isLegalUTF8(source, length);
+ }
+
+ /* --------------------------------------------------------------------- */
+
+ ConversionResult ConvertUTF8toUTF16(const UTF8** sourceStart, const UTF8* sourceEnd,
+ UTF16** targetStart, UTF16* targetEnd, ConversionFlags flags)
+ {
+ ConversionResult result = conversionOK;
+ const UTF8* source = *sourceStart;
+ UTF16* target = *targetStart;
+ while (source < sourceEnd) {
+ UTF32 ch = 0;
+ unsigned short extraBytesToRead = trailingBytesForUTF8[*source];
+ if (source + extraBytesToRead >= sourceEnd) {
+ result = sourceExhausted;
+ break;
+ }
+ /* Do this check whether lenient or strict */
+ if (!isLegalUTF8(source, extraBytesToRead + 1)) {
+ result = sourceIllegal;
+ break;
+ }
+ /*
+ * The cases all fall through. See "Note A" below.
+ */
+ switch (extraBytesToRead) {
+ case 5:
+ ch += *source++;
+ ch <<= 6; /* remember, illegal UTF-8 */
+ /* no break */
+ case 4:
+ ch += *source++;
+ ch <<= 6; /* remember, illegal UTF-8 */
+ /* no break */
+ case 3:
+ ch += *source++;
+ ch <<= 6;
+ /* no break */
+ case 2:
+ ch += *source++;
+ ch <<= 6;
+ /* no break */
+ case 1:
+ ch += *source++;
+ ch <<= 6;
+ /* no break */
+ case 0:
+ ch += *source++;
+ /* no break */
+ }
+ ch -= offsetsFromUTF8[extraBytesToRead];
+
+ if (target >= targetEnd) {
+ source -= (extraBytesToRead + 1); /* Back up source pointer! */
+ result = targetExhausted;
+ break;
+ }
+ if (ch <= UNI_MAX_BMP) { /* Target is a character <= 0xFFFF */
+ /* UTF-16 surrogate values are illegal in UTF-32 */
+ if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_LOW_END) {
+ if (flags == strictConversion) {
+ source -= (extraBytesToRead + 1); /* return to the illegal value itself */
+ result = sourceIllegal;
+ break;
+ } else {
+ *target++ = UNI_REPLACEMENT_CHAR;
+ }
+ } else {
+ *target++ = (UTF16)ch; /* normal case */
+ }
+ } else if (ch > UNI_MAX_UTF16) {
+ if (flags == strictConversion) {
+ result = sourceIllegal;
+ source -= (extraBytesToRead + 1); /* return to the start */
+ break; /* Bail out; shouldn't continue */
+ } else {
+ *target++ = UNI_REPLACEMENT_CHAR;
+ }
+ } else {
+ /* target is a character in range 0xFFFF - 0x10FFFF. */
+ if (target + 1 >= targetEnd) {
+ source -= (extraBytesToRead + 1); /* Back up source pointer! */
+ result = targetExhausted;
+ break;
+ }
+ ch -= halfBase;
+ *target++ = (UTF16)((ch >> halfShift) + UNI_SUR_HIGH_START );
+ *target++ = (UTF16)((ch & halfMask) + UNI_SUR_LOW_START );
+ }
+ }
+ *sourceStart = source;
+ *targetStart = target;
+ return result;
+ }
+
+ /* --------------------------------------------------------------------- */
+
+ ConversionResult ConvertUTF32toUTF8(const UTF32** sourceStart, const UTF32* sourceEnd,
+ UTF8** targetStart, UTF8* targetEnd, ConversionFlags flags)
+ {
+ ConversionResult result = conversionOK;
+ const UTF32* source = *sourceStart;
+ UTF8* target = *targetStart;
+ while (source < sourceEnd) {
+ UTF32 ch;
+ unsigned short bytesToWrite = 0;
+ const UTF32 byteMask = 0xBF;
+ const UTF32 byteMark = 0x80;
+ ch = *source++;
+ if (flags == strictConversion) {
+ /* UTF-16 surrogate values are illegal in UTF-32 */
+ if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_LOW_END) {
+ --source; /* return to the illegal value itself */
+ result = sourceIllegal;
+ break;
+ }
+ }
+ /*
+ * Figure out how many bytes the result will require. Turn any
+ * illegally large UTF32 things (> Plane 17) into replacement chars.
+ */
+ if (ch < (UTF32)0x80) {
+ bytesToWrite = 1;
+ } else if (ch < (UTF32)0x800) {
+ bytesToWrite = 2;
+ } else if (ch < (UTF32)0x10000) {
+ bytesToWrite = 3;
+ } else if (ch <= UNI_MAX_LEGAL_UTF32) {
+ bytesToWrite = 4;
+ } else {
+ bytesToWrite = 3;
+ ch = UNI_REPLACEMENT_CHAR;
+ result = sourceIllegal;
+ }
+
+ target += bytesToWrite;
+ if (target > targetEnd) {
+ --source; /* Back up source pointer! */
+ target -= bytesToWrite;
+ result = targetExhausted;
+ break;
+ }
+ switch (bytesToWrite) { /* note: everything falls through. */
+ case 4:
+ *--target = (UTF8)((ch | byteMark) & byteMask);
+ ch >>= 6;
+ /* no break */
+ case 3:
+ *--target = (UTF8)((ch | byteMark) & byteMask);
+ ch >>= 6;
+ /* no break */
+ case 2:
+ *--target = (UTF8)((ch | byteMark) & byteMask);
+ ch >>= 6;
+ /* no break */
+ case 1:
+ *--target = (UTF8)(ch | firstByteMark[bytesToWrite]);
+ /* no break */
+ }
+ target += bytesToWrite;
+ }
+ *sourceStart = source;
+ *targetStart = target;
+ return result;
+ }
+
+ /* --------------------------------------------------------------------- */
+
+ ConversionResult ConvertUTF8toUTF32(const UTF8** sourceStart, const UTF8* sourceEnd,
+ UTF32** targetStart, UTF32* targetEnd, ConversionFlags flags)
+ {
+ ConversionResult result = conversionOK;
+ const UTF8* source = *sourceStart;
+ UTF32* target = *targetStart;
+ while (source < sourceEnd) {
+ UTF32 ch = 0;
+ unsigned short extraBytesToRead = trailingBytesForUTF8[*source];
+ if (source + extraBytesToRead >= sourceEnd) {
+ result = sourceExhausted;
+ break;
+ }
+ /* Do this check whether lenient or strict */
+ if (!isLegalUTF8(source, extraBytesToRead + 1)) {
+ result = sourceIllegal;
+ break;
+ }
+ /*
+ * The cases all fall through. See "Note A" below.
+ */
+ switch (extraBytesToRead) {
+ case 5:
+ ch += *source++;
+ ch <<= 6;
+ /* no break */
+ case 4:
+ ch += *source++;
+ ch <<= 6;
+ /* no break */
+ case 3:
+ ch += *source++;
+ ch <<= 6;
+ /* no break */
+ case 2:
+ ch += *source++;
+ ch <<= 6;
+ /* no break */
+ case 1:
+ ch += *source++;
+ ch <<= 6;
+ /* no break */
+ case 0:
+ ch += *source++;
+ /* no break */
+ }
+ ch -= offsetsFromUTF8[extraBytesToRead];
+
+ if (target >= targetEnd) {
+ source -= (extraBytesToRead + 1); /* Back up the source pointer! */
+ result = targetExhausted;
+ break;
+ }
+ if (ch <= UNI_MAX_LEGAL_UTF32) {
+ /*
+ * UTF-16 surrogate values are illegal in UTF-32, and anything
+ * over Plane 17 (> 0x10FFFF) is illegal.
+ */
+ if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_LOW_END) {
+ if (flags == strictConversion) {
+ source -= (extraBytesToRead + 1); /* return to the illegal value itself */
+ result = sourceIllegal;
+ break;
+ } else {
+ *target++ = UNI_REPLACEMENT_CHAR;
+ }
+ } else {
+ *target++ = ch;
+ }
+ } else { /* i.e., ch > UNI_MAX_LEGAL_UTF32 */
+ result = sourceIllegal;
+ *target++ = UNI_REPLACEMENT_CHAR;
+ }
+ }
+ *sourceStart = source;
+ *targetStart = target;
+ return result;
+ }
+
+ /* ---------------------------------------------------------------------
+
+ Note A.
+ The fall-through switches in UTF-8 reading code save a
+ temp variable, some decrements & conditionals. The switches
+ are equivalent to the following loop:
+ {
+ int tmpBytesToRead = extraBytesToRead+1;
+ do {
+ ch += *source++;
+ --tmpBytesToRead;
+ if (tmpBytesToRead) ch <<= 6;
+ } while (tmpBytesToRead > 0);
+ }
+ In UTF-8 writing code, the switches on "bytesToWrite" are
+ similarly unrolled loops.
+
+ --------------------------------------------------------------------- */
//////////////
-
#ifdef __cplusplus
-transcode_to_utf16::transcode_to_utf16(const char *utf8_input)
-: _orig_length(int(strlen(utf8_input)) + 1),
- _converted(new UTF16[_orig_length + 1])
- // we don't ever expect the string to get longer going to the larger data
- // type, so the current length should be enough.
-{
- _result = conversionOK;
- if (_orig_length == 1) {
- // no length, so only provide a blank string.
- _converted[0] = 0;
- return;
- }
- memset((abyte *)_converted, 0, 2 * _orig_length);
- // we use these temporary pointers since the converter resets the source
- // and target pointers to the end of the conversion. the same pattern
- // is used in the code below.
- const UTF8 *temp_in = (const UTF8 *)utf8_input;
- UTF16 *temp_out = _converted;
- _result = ConvertUTF8toUTF16(&temp_in, temp_in + _orig_length,
- &temp_out, temp_out + _orig_length, lenientConversion);
-}
-
-transcode_to_utf16::transcode_to_utf16(const astring &utf8_input)
-: _orig_length(utf8_input.length() + 1),
- _converted(new UTF16[_orig_length])
-{
- _result = conversionOK;
- if (_orig_length == 1) {
- // no length, so only provide a blank string.
- _converted[0] = 0;
- return;
- }
- memset((abyte *)_converted, 0, 2 * _orig_length);
- const UTF8 *temp_in = (const UTF8 *)utf8_input.observe();
- UTF16 *temp_out = _converted;
- _result = ConvertUTF8toUTF16(&temp_in, temp_in + _orig_length,
- &temp_out, temp_out + _orig_length, lenientConversion);
-}
-
-transcode_to_utf16::~transcode_to_utf16()
-{
- delete [] _converted;
- _converted = NIL;
-}
-
-int transcode_to_utf16::length() const
-{ return int(wcslen((wchar_t *)_converted)); }
+ transcode_to_utf16::transcode_to_utf16(const char *utf8_input)
+ : _orig_length(int(strlen(utf8_input)) + 1), _converted(new UTF16[_orig_length + 1])
+ // we don't ever expect the string to get longer going to the larger data
+ // type, so the current length should be enough.
+ {
+ _result = conversionOK;
+ if (_orig_length == 1) {
+ // no length, so only provide a blank string.
+ _converted[0] = 0;
+ return;
+ }
+ memset((abyte *)_converted, 0, 2 * _orig_length);
+ // we use these temporary pointers since the converter resets the source
+ // and target pointers to the end of the conversion. the same pattern
+ // is used in the code below.
+ const UTF8 *temp_in = (const UTF8 *)utf8_input;
+ UTF16 *temp_out = _converted;
+ _result = ConvertUTF8toUTF16(&temp_in, temp_in + _orig_length, &temp_out,
+ temp_out + _orig_length, lenientConversion);
+ }
+
+ transcode_to_utf16::transcode_to_utf16(const astring &utf8_input)
+ : _orig_length(utf8_input.length() + 1), _converted(new UTF16[_orig_length])
+ {
+ _result = conversionOK;
+ if (_orig_length == 1) {
+ // no length, so only provide a blank string.
+ _converted[0] = 0;
+ return;
+ }
+ memset((abyte *)_converted, 0, 2 * _orig_length);
+ const UTF8 *temp_in = (const UTF8 *)utf8_input.observe();
+ UTF16 *temp_out = _converted;
+ _result = ConvertUTF8toUTF16(&temp_in, temp_in + _orig_length, &temp_out,
+ temp_out + _orig_length, lenientConversion);
+ }
+
+ transcode_to_utf16::~transcode_to_utf16()
+ {
+ delete[] _converted;
+ _converted = NIL;
+ }
+
+ int transcode_to_utf16::length() const
+ {
+ return int(wcslen((wchar_t *)_converted));
+ }
//////////////
-transcode_to_utf8::transcode_to_utf8(const UTF16 *utf16_input)
-: _orig_length(int(wcslen((const wchar_t *)utf16_input))),
- _new_length(_orig_length * 2 + _orig_length / 2 + 1),
- // this is just an estimate. it may be appropriate most of the time.
- // whatever doesn't fit will get truncated.
- _converted(new UTF8[_new_length])
-{
- _result = conversionOK;
- if (_orig_length == 0) {
- // no length, so only provide a blank string.
- _converted[0] = 0;
- return;
- }
- memset(_converted, 0, _new_length);
- const UTF16 *temp_in = (const UTF16 *)utf16_input;
- UTF8 *temp_out = _converted;
- _result = ConvertUTF16toUTF8(&temp_in, temp_in + _orig_length,
- &temp_out, temp_out + _new_length, lenientConversion);
-}
-
-transcode_to_utf8::transcode_to_utf8(const wchar_t *utf16_input)
-: _orig_length(int(wcslen(utf16_input))),
- _new_length(_orig_length * 2 + _orig_length / 2 + 1),
- // this is just an estimate. it may be appropriate most of the time.
- // whatever doesn't fit will get truncated.
- _converted(new UTF8[_new_length > 0 ? _new_length : 1])
-{
- _result = conversionOK;
- if (_orig_length == 0) {
- // no length, so only provide a blank string.
- _converted[0] = 0;
- return;
- }
- memset(_converted, 0, _new_length);
- const UTF16 *temp_in = (const UTF16 *)utf16_input;
- UTF8 *temp_out = _converted;
- _result = ConvertUTF16toUTF8(&temp_in, temp_in + _orig_length,
- &temp_out, temp_out + _new_length, lenientConversion);
-}
-
-transcode_to_utf8::~transcode_to_utf8()
-{
- delete [] _converted;
- _converted = NIL;
-}
-
-int transcode_to_utf8::length() const
-{ return int(strlen((char *)_converted)); }
-
-transcode_to_utf8::operator astring() const
-{ return astring((char *)_converted); }
+ transcode_to_utf8::transcode_to_utf8(const UTF16 *utf16_input)
+ : _orig_length(int(wcslen((const wchar_t *)utf16_input))),
+ _new_length(_orig_length * 2 + _orig_length / 2 + 1),
+ // this is just an estimate. it may be appropriate most of the time.
+ // whatever doesn't fit will get truncated.
+ _converted(new UTF8[_new_length])
+ {
+ _result = conversionOK;
+ if (_orig_length == 0) {
+ // no length, so only provide a blank string.
+ _converted[0] = 0;
+ return;
+ }
+ memset(_converted, 0, _new_length);
+ const UTF16 *temp_in = (const UTF16 *)utf16_input;
+ UTF8 *temp_out = _converted;
+ _result = ConvertUTF16toUTF8(&temp_in, temp_in + _orig_length, &temp_out,
+ temp_out + _new_length, lenientConversion);
+ }
+
+ transcode_to_utf8::transcode_to_utf8(const wchar_t *utf16_input)
+ : _orig_length(int(wcslen(utf16_input))),
+ _new_length(_orig_length * 2 + _orig_length / 2 + 1),
+ // this is just an estimate. it may be appropriate most of the time.
+ // whatever doesn't fit will get truncated.
+ _converted(new UTF8[_new_length > 0 ? _new_length : 1])
+ {
+ _result = conversionOK;
+ if (_orig_length == 0) {
+ // no length, so only provide a blank string.
+ _converted[0] = 0;
+ return;
+ }
+ memset(_converted, 0, _new_length);
+ const UTF16 *temp_in = (const UTF16 *)utf16_input;
+ UTF8 *temp_out = _converted;
+ _result = ConvertUTF16toUTF8(&temp_in, temp_in + _orig_length, &temp_out,
+ temp_out + _new_length, lenientConversion);
+ }
+
+ transcode_to_utf8::~transcode_to_utf8()
+ {
+ delete[] _converted;
+ _converted = NIL;
+ }
+
+ int transcode_to_utf8::length() const
+ {
+ return int(strlen((char *)_converted));
+ }
+
+ transcode_to_utf8::operator astring() const
+ {
+ return astring((char *)_converted);
+ }
//////////////
-null_transcoder::null_transcoder(const char *utf8_input, bool make_own_copy)
-: _make_own_copy(make_own_copy),
- _converted(make_own_copy? new UTF8[strlen(utf8_input) + 1]
- : (const UTF8 *)utf8_input)
-{
- if (_make_own_copy) {
- strcpy((char *)_converted, utf8_input);
- }
-}
-
-null_transcoder::null_transcoder(const astring &utf8_input, bool make_own_copy)
-: _make_own_copy(make_own_copy),
- _converted(make_own_copy? new UTF8[utf8_input.length() + 1]
- : (const UTF8 *)utf8_input.s())
-{
- if (_make_own_copy) {
- strcpy((char *)_converted, utf8_input.s());
- }
-}
-
-int null_transcoder::length() const
-{ return int(strlen((char *)_converted)); }
+ null_transcoder::null_transcoder(const char *utf8_input, bool make_own_copy)
+ : _make_own_copy(make_own_copy),
+ _converted(make_own_copy ? new UTF8[strlen(utf8_input) + 1] : (const UTF8 *)utf8_input)
+ {
+ if (_make_own_copy) {
+ strcpy((char *)_converted, utf8_input);
+ }
+ }
+
+ null_transcoder::null_transcoder(const astring &utf8_input, bool make_own_copy)
+ : _make_own_copy(make_own_copy),
+ _converted(
+ make_own_copy ? new UTF8[utf8_input.length() + 1] : (const UTF8 *)utf8_input.s())
+ {
+ if (_make_own_copy) {
+ strcpy((char *)_converted, utf8_input.s());
+ }
+ }
+
+ int null_transcoder::length() const
+ {
+ return int(strlen((char *)_converted));
+ }
#endif //_cplusplus
-
-} //namespace.
+} //namespace.
projects / feisty_meow.git / commitdiff