+++ /dev/null
-/*
- * Copyright 2001-2004 Unicode, Inc.
- *
- * Disclaimer
- *
- * This source code is provided as is by Unicode, Inc. No claims are
- * made as to fitness for any particular purpose. No warranties of any
- * kind are expressed or implied. The recipient agrees to determine
- * applicability of information provided. If this file has been
- * purchased on magnetic or optical media from Unicode, Inc., the
- * sole remedy for any claim will be exchange of defective media
- * within 90 days of receipt.
- *
- * Limitations on Rights to Redistribute This Code
- *
- * Unicode, Inc. hereby grants the right to freely use the information
- * supplied in this file in the creation of products supporting the
- * Unicode Standard, and to make copies of this file in any form
- * for internal or external distribution as long as this notice
- * remains attached.
- */
-
-/* ---------------------------------------------------------------------
-
- 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.
-
------------------------------------------------------------------------- */
-
-#include "ConvertUTF.h"
-#ifdef CVTUTF_DEBUG
-#include <stdio.h>
-#endif
-
-namespace replxx {
-
-#define UNI_SUR_HIGH_START (UTF32)0xD800
-#define UNI_SUR_LOW_END (UTF32)0xDFFF
-
-/* --------------------------------------------------------------------- */
-
-/*
- * 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.
- */
-
-/* --------------------------------------------------------------------- */
-
-/*
- * 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 bool 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; } /* fall through */
- case 3: { if ((a = (*--srcptr)) < 0x80 || a > 0xBF) return false; } /* fall through */
- 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;
- }
- } /* fall through */
- case 1: { if (*source >= 0x80 && *source < 0xC2) return false; } /* fall through */
- }
- if (*source > 0xF4) return false;
- return true;
-}
-
-/* --------------------------------------------------------------------- */
-
-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; } /* fall through */
- case 3: { *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6; } /* fall through */
- case 2: { *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6; } /* fall through */
- case 1: { *--target = (UTF8) (ch | firstByteMark[bytesToWrite]); } /* fall through */
- }
- 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; } /* fall through */
- case 4: { ch += *source++; ch <<= 6; } /* fall through */
- case 3: { ch += *source++; ch <<= 6; } /* fall through */
- case 2: { ch += *source++; ch <<= 6; } /* fall through */
- case 1: { ch += *source++; ch <<= 6; } /* fall through */
- case 0: { ch += *source++; } /* fall through */
- }
- 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.
-
- --------------------------------------------------------------------- */
+++ /dev/null
-/*
- * Copyright 2001-2004 Unicode, Inc.
- *
- * Disclaimer
- *
- * This source code is provided as is by Unicode, Inc. No claims are
- * made as to fitness for any particular purpose. No warranties of any
- * kind are expressed or implied. The recipient agrees to determine
- * applicability of information provided. If this file has been
- * purchased on magnetic or optical media from Unicode, Inc., the
- * sole remedy for any claim will be exchange of defective media
- * within 90 days of receipt.
- *
- * Limitations on Rights to Redistribute This Code
- *
- * Unicode, Inc. hereby grants the right to freely use the information
- * supplied in this file in the creation of products supporting the
- * Unicode Standard, and to make copies of this file in any form
- * for internal or external distribution as long as this notice
- * remains attached.
- */
-
-/* ---------------------------------------------------------------------
-
- Conversions between UTF32, UTF-16, and UTF-8. Header file.
-
- Several funtions are included here, forming a complete set of
- conversions between the three formats. UTF-7 is not included
- here, but is handled in a separate source file.
-
- Each of these routines takes pointers to input buffers and output
- buffers. The input buffers are const.
-
- Each routine converts the text between *sourceStart and sourceEnd,
- putting the result into the buffer between *targetStart and
- targetEnd. Note: the end pointers are *after* the last item: e.g.
- *(sourceEnd - 1) is the last item.
-
- The return result indicates whether the conversion was successful,
- and if not, whether the problem was in the source or target buffers.
- (Only the first encountered problem is indicated.)
-
- After the conversion, *sourceStart and *targetStart are both
- updated to point to the end of last text successfully converted in
- the respective buffers.
-
- Input parameters:
- sourceStart - pointer to a pointer to the source buffer.
- The contents of this are modified on return so that
- it points at the next thing to be converted.
- targetStart - similarly, pointer to pointer to the target buffer.
- sourceEnd, targetEnd - respectively pointers to the ends of the
- two buffers, for overflow checking only.
-
- These conversion functions take a ConversionFlags argument. When this
- flag is set to strict, both irregular sequences and isolated surrogates
- will cause an error. When the flag is set to lenient, both irregular
- sequences and isolated surrogates are converted.
-
- Whether the flag is strict or lenient, all illegal sequences will cause
- an error return. This includes sequences such as: <F4 90 80 80>, <C0 80>,
- or <A0> in UTF-8, and values above 0x10FFFF in UTF-32. Conformant code
- must check for illegal sequences.
-
- When the flag is set to lenient, characters over 0x10FFFF are converted
- to the replacement character; otherwise (when the flag is set to strict)
- they constitute an error.
-
- Output parameters:
- The value "sourceIllegal" is returned from some routines if the input
- sequence is malformed. When "sourceIllegal" is returned, the source
- value will point to the illegal value that caused the problem. E.g.,
- in UTF-8 when a sequence is malformed, it points to the start of the
- malformed sequence.
-
- Author: Mark E. Davis, 1994.
- Rev History: Rick McGowan, fixes & updates May 2001.
- Fixes & updates, Sept 2001.
-
------------------------------------------------------------------------- */
-
-/* ---------------------------------------------------------------------
- The following 4 definitions are compiler-specific.
- The C standard does not guarantee that wchar_t has at least
- 16 bits, so wchar_t is no less portable than unsigned short!
- All should be unsigned values to avoid sign extension during
- bit mask & shift operations.
------------------------------------------------------------------------- */
-
-#ifndef REPLXX_CONVERT_UTF8_H_INCLUDED
-#define REPLXX_CONVERT_UTF8_H_INCLUDED 1
-
-#if 0
-typedef unsigned long UTF32; /* at least 32 bits */
-typedef unsigned short UTF16; /* at least 16 bits */
-typedef unsigned char UTF8; /* typically 8 bits */
-#endif
-
-#include <stdint.h>
-#include <string>
-
-namespace replxx {
-
-typedef uint32_t UTF32;
-typedef uint16_t UTF16;
-typedef uint8_t UTF8;
-
-/* Some fundamental constants */
-#define UNI_REPLACEMENT_CHAR (UTF32)0x0000FFFD
-#define UNI_MAX_BMP (UTF32)0x0000FFFF
-#define UNI_MAX_UTF16 (UTF32)0x0010FFFF
-#define UNI_MAX_UTF32 (UTF32)0x7FFFFFFF
-#define UNI_MAX_LEGAL_UTF32 (UTF32)0x0010FFFF
-
-typedef enum {
- conversionOK, /* conversion successful */
- sourceExhausted, /* partial character in source, but hit end */
- targetExhausted, /* insuff. room in target for conversion */
- sourceIllegal /* source sequence is illegal/malformed */
-} ConversionResult;
-
-typedef enum {
- strictConversion = 0,
- lenientConversion
-} ConversionFlags;
-
-ConversionResult ConvertUTF8toUTF32 (
- const UTF8** sourceStart, const UTF8* sourceEnd,
- UTF32** targetStart, UTF32* targetEnd, ConversionFlags flags);
-
-ConversionResult ConvertUTF32toUTF8 (
- const UTF32** sourceStart, const UTF32* sourceEnd,
- UTF8** targetStart, UTF8* targetEnd, ConversionFlags flags);
-
-}
-
-#endif /* REPLXX_CONVERT_UTF8_H_INCLUDED */
-
-/* --------------------------------------------------------------------- */
projects / rspamd.git / commitdiff