зеркало из https://github.com/microsoft/clang-1.git
Add ConvertUTF module from http://www.unicode.org/Public/PROGRAMS/CVTUTF.
#ifdef'd out the 5 conversion routines that we don't currently need. Still need a bit more work in GetAddrOfConstantCFString(). Added a FIXME to indicate this. Expect to remove the FIXME today... git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68208 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Steve Naroff
Родитель
969c689d89
Коммит
e9b7d8ace8
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|||
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@ -449,6 +450,8 @@
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|
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906BF4AE0F83BA16001071FA /* ConvertUTF.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ConvertUTF.h; sourceTree = "<group>"; };
|
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906BF4AF0F83BA2E001071FA /* ConvertUTF.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = ConvertUTF.c; sourceTree = "<group>"; };
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|
||||
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@ -1128,6 +1131,7 @@
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|
||||
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|
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|
||||
906BF4AE0F83BA16001071FA /* ConvertUTF.h */,
|
||||
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|
||||
1A7019E90F79BC1100FEC4D1 /* DiagnosticAnalysisKinds.td */,
|
||||
1A7019EA0F79BC1100FEC4D1 /* DiagnosticASTKinds.td */,
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||||
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@ -1183,6 +1187,7 @@
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DED7D7500A5242C7003AD0FB /* Basic */ = {
|
||||
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|
||||
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|
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||||
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|
||||
DED7D75E0A5242C7003AD0FB /* FileManager.cpp */,
|
||||
DE3986F30CB8D50C00223765 /* IdentifierTable.cpp */,
|
||||
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|
@ -1557,6 +1562,7 @@
|
|||
DEDFE6670F7B3B830035BD10 /* HostInfo.cpp in Sources */,
|
||||
DEDFE6680F7B3B830035BD10 /* Driver.cpp in Sources */,
|
||||
1A701B640F7C8FE400FEC4D1 /* SemaAccess.cpp in Sources */,
|
||||
906BF4B00F83BA2E001071FA /* ConvertUTF.c in Sources */,
|
||||
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|
||||
runOnlyForDeploymentPostprocessing = 0;
|
||||
};
|
||||
|
|
|
|||
|
|
@ -0,0 +1,159 @@
|
|||
/*===--- ConvertUTF.h - Universal Character Names conversions ---------------===
|
||||
*
|
||||
* The LLVM Compiler Infrastructure
|
||||
*
|
||||
* This file is distributed under the University of Illinois Open Source
|
||||
* License. See LICENSE.TXT for details.
|
||||
*
|
||||
*==------------------------------------------------------------------------==*/
|
||||
/*
|
||||
* 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.
|
||||
------------------------------------------------------------------------ */
|
||||
|
||||
typedef unsigned long UTF32; /* at least 32 bits */
|
||||
typedef unsigned short UTF16; /* at least 16 bits */
|
||||
typedef unsigned char UTF8; /* typically 8 bits */
|
||||
typedef unsigned char Boolean; /* 0 or 1 */
|
||||
|
||||
/* 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;
|
||||
|
||||
/* This is for C++ and does no harm in C */
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
ConversionResult ConvertUTF8toUTF16 (
|
||||
const UTF8** sourceStart, const UTF8* sourceEnd,
|
||||
UTF16** targetStart, UTF16* targetEnd, ConversionFlags flags);
|
||||
|
||||
#ifdef CLANG_NEEDS_THESE_ONE_DAY
|
||||
ConversionResult ConvertUTF16toUTF8 (
|
||||
const UTF16** sourceStart, const UTF16* sourceEnd,
|
||||
UTF8** targetStart, UTF8* targetEnd, ConversionFlags flags);
|
||||
|
||||
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);
|
||||
|
||||
ConversionResult ConvertUTF16toUTF32 (
|
||||
const UTF16** sourceStart, const UTF16* sourceEnd,
|
||||
UTF32** targetStart, UTF32* targetEnd, ConversionFlags flags);
|
||||
|
||||
ConversionResult ConvertUTF32toUTF16 (
|
||||
const UTF32** sourceStart, const UTF32* sourceEnd,
|
||||
UTF16** targetStart, UTF16* targetEnd, ConversionFlags flags);
|
||||
#endif
|
||||
|
||||
Boolean isLegalUTF8Sequence(const UTF8 *source, const UTF8 *sourceEnd);
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
/* --------------------------------------------------------------------- */
|
||||
|
|
@ -1,6 +1,7 @@
|
|||
set(LLVM_NO_RTTI 1)
|
||||
|
||||
add_clang_library(clangBasic
|
||||
ConvertUTF.c
|
||||
Diagnostic.cpp
|
||||
FileManager.cpp
|
||||
IdentifierTable.cpp
|
||||
|
|
|
|||
|
|
@ -0,0 +1,547 @@
|
|||
/*===--- ConvertUTF.c - Universal Character Names conversions ---------------===
|
||||
*
|
||||
* The LLVM Compiler Infrastructure
|
||||
*
|
||||
* This file is distributed under the University of Illinois Open Source
|
||||
* License. See LICENSE.TXT for details.
|
||||
*
|
||||
*===------------------------------------------------------------------------=*/
|
||||
/*
|
||||
* 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 "clang/Basic/ConvertUTF.h"
|
||||
#ifdef CVTUTF_DEBUG
|
||||
#include <stdio.h>
|
||||
#endif
|
||||
|
||||
static const int halfShift = 10; /* used for shifting by 10 bits */
|
||||
|
||||
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
|
||||
#define false 0
|
||||
#define true 1
|
||||
|
||||
/* --------------------------------------------------------------------- */
|
||||
|
||||
/*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#ifdef CLANG_NEEDS_THESE_ONE_DAY
|
||||
|
||||
/* --------------------------------------------------------------------- */
|
||||
|
||||
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);
|
||||
}
|
||||
#endif
|
||||
return result;
|
||||
}
|
||||
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;
|
||||
}
|
||||
|
||||
/* --------------------------------------------------------------------- */
|
||||
|
||||
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;
|
||||
}
|
||||
#endif
|
||||
|
||||
/* --------------------------------------------------------------------- */
|
||||
|
||||
/*
|
||||
* 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 Boolean 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.
|
||||
*/
|
||||
Boolean 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;
|
||||
}
|
||||
|
||||
/* ---------------------------------------------------------------------
|
||||
|
||||
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.
|
||||
|
||||
--------------------------------------------------------------------- */
|
||||
|
|
@ -24,6 +24,7 @@
|
|||
#include "clang/Basic/Diagnostic.h"
|
||||
#include "clang/Basic/SourceManager.h"
|
||||
#include "clang/Basic/TargetInfo.h"
|
||||
#include "clang/Basic/ConvertUTF.h"
|
||||
#include "llvm/CallingConv.h"
|
||||
#include "llvm/Module.h"
|
||||
#include "llvm/Intrinsics.h"
|
||||
|
|
@ -1003,9 +1004,21 @@ static void appendFieldAndPadding(CodeGenModule &CGM,
|
|||
// See: <rdr://2996215>
|
||||
llvm::Constant *CodeGenModule::
|
||||
GetAddrOfConstantCFString(const StringLiteral *Literal) {
|
||||
// if (Literal->containsNonAsciiOrNull()) {
|
||||
// // FIXME: Convert from UTF-8 to UTF-16.
|
||||
// }
|
||||
bool isUTF16 = false;
|
||||
if (Literal->containsNonAsciiOrNull()) {
|
||||
// Convert from UTF-8 to UTF-16.
|
||||
llvm::SmallVector<UTF16, 128> ToBuf(Literal->getByteLength());
|
||||
const UTF8 *FromPtr = (UTF8 *)Literal->getStrData();
|
||||
UTF16 *ToPtr = &ToBuf[0];
|
||||
|
||||
ConversionResult Result;
|
||||
Result = ConvertUTF8toUTF16(&FromPtr, FromPtr+Literal->getByteLength(),
|
||||
&ToPtr, ToPtr+Literal->getByteLength(),
|
||||
strictConversion);
|
||||
assert(Result == conversionOK && "UTF-8 to UTF-16 conversion failed");
|
||||
isUTF16 = true;
|
||||
// FIXME: Do something with the converted value!
|
||||
}
|
||||
std::string str(Literal->getStrData(), Literal->getByteLength());
|
||||
llvm::StringMapEntry<llvm::Constant *> &Entry =
|
||||
CFConstantStringMap.GetOrCreateValue(&str[0], &str[str.length()]);
|
||||
|
|
@ -1056,7 +1069,9 @@ GetAddrOfConstantCFString(const StringLiteral *Literal) {
|
|||
NextField = *Field++;
|
||||
const llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy);
|
||||
appendFieldAndPadding(*this, Fields, CurField, NextField,
|
||||
llvm::ConstantInt::get(Ty, 0x07C8), CFRD, STy);
|
||||
isUTF16 ? llvm::ConstantInt::get(Ty, 0x07d0)
|
||||
: llvm::ConstantInt::get(Ty, 0x07C8),
|
||||
CFRD, STy);
|
||||
|
||||
// String pointer.
|
||||
CurField = NextField;
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче