/*
* Copyright (c) 2008-2024 Jonathan Schleifer <js@nil.im>
*
* All rights reserved.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License version 3.0 only,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* version 3.0 for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* version 3.0 along with this program. If not, see
* <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#ifdef OF_HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#import "OFUTF8String.h"
#import "OFUTF8String+Private.h"
#import "OFASPrintF.h"
#import "OFArray.h"
#import "OFData.h"
#import "OFMutableUTF8String.h"
#import "OFInitializationFailedException.h"
#import "OFInvalidArgumentException.h"
#import "OFInvalidEncodingException.h"
#import "OFInvalidFormatException.h"
#import "OFOutOfMemoryException.h"
#import "OFOutOfRangeException.h"
#import "unicode.h"
extern const OFChar16 OFISO8859_2Table[];
extern const size_t OFISO8859_2TableOffset;
extern const OFChar16 OFISO8859_3Table[];
extern const size_t OFISO8859_3TableOffset;
extern const OFChar16 OFISO8859_15Table[];
extern const size_t OFISO8859_15TableOffset;
extern const OFChar16 OFWindows1251Table[];
extern const size_t OFWindows1251TableOffset;
extern const OFChar16 OFWindows1252Table[];
extern const size_t OFWindows1252TableOffset;
extern const OFChar16 OFCodepage437Table[];
extern const size_t OFCodepage437TableOffset;
extern const OFChar16 OFCodepage850Table[];
extern const size_t OFCodepage850TableOffset;
extern const OFChar16 OFCodepage858Table[];
extern const size_t OFCodepage858TableOffset;
extern const OFChar16 OFMacRomanTable[];
extern const size_t OFMacRomanTableOffset;
extern const OFChar16 OFKOI8RTable[];
extern const size_t OFKOI8RTableOffset;
extern const OFChar16 OFKOI8UTable[];
extern const size_t OFKOI8UTableOffset;
static inline int
memcasecmp(const char *first, const char *second, size_t length)
{
for (size_t i = 0; i < length; i++) {
unsigned char f = first[i];
unsigned char s = second[i];
f = OFASCIIToUpper(f);
s = OFASCIIToUpper(s);
if (f > s)
return OFOrderedDescending;
if (f < s)
return OFOrderedAscending;
}
return OFOrderedSame;
}
int
OFUTF8StringCheck(const char *UTF8String, size_t UTF8Length, size_t *length)
{
size_t tmpLength = UTF8Length;
int isUTF8 = 0;
for (size_t i = 0; i < UTF8Length; i++) {
/* No sign of UTF-8 here */
if OF_LIKELY (!(UTF8String[i] & 0x80))
continue;
isUTF8 = 1;
/* We're missing a start byte here */
if OF_UNLIKELY (!(UTF8String[i] & 0x40))
return -1;
/* 2 byte sequences for code points 0 - 127 are forbidden */
if OF_UNLIKELY ((UTF8String[i] & 0x7E) == 0x40)
return -1;
/* We have at minimum a 2 byte character -> check next byte */
if OF_UNLIKELY (UTF8Length <= i + 1 ||
(UTF8String[i + 1] & 0xC0) != 0x80)
return -1;
/* Check if we have at minimum a 3 byte character */
if OF_LIKELY (!(UTF8String[i] & 0x20)) {
i++;
tmpLength--;
continue;
}
/* We have at minimum a 3 byte char -> check second next byte */
if OF_UNLIKELY (UTF8Length <= i + 2 ||
(UTF8String[i + 2] & 0xC0) != 0x80)
return -1;
/* Check if we have a 4 byte character */
if OF_LIKELY (!(UTF8String[i] & 0x10)) {
i += 2;
tmpLength -= 2;
continue;
}
/* We have a 4 byte character -> check third next byte */
if OF_UNLIKELY (UTF8Length <= i + 3 ||
(UTF8String[i + 3] & 0xC0) != 0x80)
return -1;
/*
* Just in case, check if there's a 5th character, which is
* forbidden by UTF-8
*/
if OF_UNLIKELY (UTF8String[i] & 0x08)
return -1;
i += 3;
tmpLength -= 3;
}
if (length != NULL)
*length = tmpLength;
return isUTF8;
}
size_t
positionToIndex(const char *string, size_t position)
{
size_t idx = position;
for (size_t i = 0; i < position; i++)
if OF_UNLIKELY ((string[i] & 0xC0) == 0x80)
idx--;
return idx;
}
size_t
OFUTF8StringIndexToPosition(const char *string, size_t idx, size_t length)
{
for (size_t i = 0; i <= idx; i++)
if OF_UNLIKELY ((string[i] & 0xC0) == 0x80)
if (++idx > length)
@throw [OFInvalidFormatException exception];
return idx;
}
@implementation OFUTF8String
- (instancetype)init
{
self = [super init];
@try {
_s = &_storage;
_s->cString = OFAllocZeroedMemory(1, 1);
_s->freeWhenDone = true;
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (instancetype)of_initWithUTF8String: (const char *)UTF8String
length: (size_t)UTF8StringLength
storage: (char *)storage
{
self = [super init];
@try {
if (UTF8StringLength >= 3 &&
memcmp(UTF8String, "\xEF\xBB\xBF", 3) == 0) {
UTF8String += 3;
UTF8StringLength -= 3;
}
_s = &_storage;
_s->cString = storage;
_s->cStringLength = UTF8StringLength;
switch (OFUTF8StringCheck(UTF8String, UTF8StringLength,
&_s->length)) {
case 1:
_s->isUTF8 = true;
break;
case -1:
@throw [OFInvalidEncodingException exception];
}
memcpy(_s->cString, UTF8String, UTF8StringLength);
_s->cString[UTF8StringLength] = 0;
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (instancetype)initWithCString: (const char *)cString
encoding: (OFStringEncoding)encoding
length: (size_t)cStringLength
{
self = [super init];
@try {
const OFChar16 *table;
size_t tableOffset, j;
if (encoding == OFStringEncodingUTF8 &&
cStringLength >= 3 &&
memcmp(cString, "\xEF\xBB\xBF", 3) == 0) {
cString += 3;
cStringLength -= 3;
}
_s = &_storage;
_s->cString = OFAllocMemory(cStringLength + 1, 1);
_s->cStringLength = cStringLength;
_s->freeWhenDone = true;
if (encoding == OFStringEncodingUTF8 ||
encoding == OFStringEncodingASCII) {
switch (OFUTF8StringCheck(cString, cStringLength,
&_s->length)) {
case 1:
if (encoding == OFStringEncodingASCII)
@throw [OFInvalidEncodingException
exception];
_s->isUTF8 = true;
break;
case -1:
@throw [OFInvalidEncodingException exception];
}
memcpy(_s->cString, cString, cStringLength);
_s->cString[cStringLength] = 0;
return self;
}
/* All other encodings we support are single byte encodings */
_s->length = cStringLength;
if (encoding == OFStringEncodingISO8859_1) {
j = 0;
for (size_t i = 0; i < cStringLength; i++) {
char buffer[4];
size_t bytes;
if (!(cString[i] & 0x80)) {
_s->cString[j++] = cString[i];
continue;
}
_s->isUTF8 = true;
bytes = OFUTF8StringEncode(
(uint8_t)cString[i], buffer);
if (bytes == 0)
@throw [OFInvalidEncodingException
exception];
_s->cStringLength += bytes - 1;
_s->cString = OFResizeMemory(_s->cString,
_s->cStringLength + 1, 1);
memcpy(_s->cString + j, buffer, bytes);
j += bytes;
}
_s->cString[_s->cStringLength] = 0;
return self;
}
switch (encoding) {
#define CASE(encoding, var) \
case encoding: \
table = var; \
tableOffset = var##Offset; \
break;
#ifdef HAVE_ISO_8859_2
CASE(OFStringEncodingISO8859_2, OFISO8859_2Table)
#endif
#ifdef HAVE_ISO_8859_3
CASE(OFStringEncodingISO8859_3, OFISO8859_3Table)
#endif
#ifdef HAVE_ISO_8859_15
CASE(OFStringEncodingISO8859_15, OFISO8859_15Table)
#endif
#ifdef HAVE_WINDOWS_1251
CASE(OFStringEncodingWindows1251, OFWindows1251Table)
#endif
#ifdef HAVE_WINDOWS_1252
CASE(OFStringEncodingWindows1252, OFWindows1252Table)
#endif
#ifdef HAVE_CODEPAGE_437
CASE(OFStringEncodingCodepage437, OFCodepage437Table)
#endif
#ifdef HAVE_CODEPAGE_850
CASE(OFStringEncodingCodepage850, OFCodepage850Table)
#endif
#ifdef HAVE_CODEPAGE_858
CASE(OFStringEncodingCodepage858, OFCodepage858Table)
#endif
#ifdef HAVE_MAC_ROMAN
CASE(OFStringEncodingMacRoman, OFMacRomanTable)
#endif
#ifdef HAVE_KOI8_R
CASE(OFStringEncodingKOI8R, OFKOI8RTable)
#endif
#ifdef HAVE_KOI8_U
CASE(OFStringEncodingKOI8U, OFKOI8UTable)
#endif
#undef CASE
default:
@throw [OFInvalidArgumentException exception];
}
j = 0;
for (size_t i = 0; i < cStringLength; i++) {
unsigned char character = (unsigned char)cString[i];
OFUnichar unichar;
char buffer[4];
size_t byteLength;
if (character < tableOffset) {
_s->cString[j++] = cString[i];
continue;
}
unichar = table[character - tableOffset];
if (unichar == 0xFFFF)
@throw [OFInvalidEncodingException exception];
_s->isUTF8 = true;
byteLength = OFUTF8StringEncode(unichar, buffer);
if (byteLength == 0)
@throw [OFInvalidEncodingException exception];
_s->cStringLength += byteLength - 1;
_s->cString = OFResizeMemory(_s->cString,
_s->cStringLength + 1, 1);
memcpy(_s->cString + j, buffer, byteLength);
j += byteLength;
}
_s->cString[_s->cStringLength] = 0;
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (instancetype)initWithUTF8StringNoCopy: (char *)UTF8String
freeWhenDone: (bool)freeWhenDone
{
return [self initWithUTF8StringNoCopy: UTF8String
length: strlen(UTF8String)
freeWhenDone: freeWhenDone];
}
- (instancetype)initWithUTF8StringNoCopy: (char *)UTF8String
length: (size_t)UTF8StringLength
freeWhenDone: (bool)freeWhenDone
{
self = [super init];
@try {
_s = &_storage;
if (UTF8StringLength >= 3 &&
memcmp(UTF8String, "\xEF\xBB\xBF", 3) == 0) {
UTF8String += 3;
UTF8StringLength -= 3;
}
switch (OFUTF8StringCheck(UTF8String, UTF8StringLength,
&_s->length)) {
case 1:
_s->isUTF8 = true;
break;
case -1:
@throw [OFInvalidEncodingException exception];
}
_s->cString = (char *)UTF8String;
_s->cStringLength = UTF8StringLength;
_s->freeWhenDone = freeWhenDone;
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (instancetype)initWithString: (OFString *)string
{
self = [super init];
@try {
_s = &_storage;
_s->cStringLength = string.UTF8StringLength;
if ([string isKindOfClass: [OFUTF8String class]] ||
[string isKindOfClass: [OFMutableUTF8String class]])
_s->isUTF8 = ((OFUTF8String *)string)->_s->isUTF8;
else
_s->isUTF8 = true;
_s->length = string.length;
_s->cString = OFAllocMemory(_s->cStringLength + 1, 1);
memcpy(_s->cString, string.UTF8String, _s->cStringLength + 1);
_s->freeWhenDone = true;
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (instancetype)initWithCharacters: (const OFUnichar *)characters
length: (size_t)length
{
self = [super init];
@try {
size_t j;
_s = &_storage;
_s->cString = OFAllocMemory((length * 4) + 1, 1);
_s->length = length;
_s->freeWhenDone = true;
j = 0;
for (size_t i = 0; i < length; i++) {
size_t len = OFUTF8StringEncode(characters[i],
_s->cString + j);
if (len == 0)
@throw [OFInvalidEncodingException exception];
if (len > 1)
_s->isUTF8 = true;
j += len;
}
_s->cString[j] = '\0';
_s->cStringLength = j;
@try {
_s->cString = OFResizeMemory(_s->cString, j + 1, 1);
} @catch (OFOutOfMemoryException *e) {
/* We don't care, as we only tried to make it smaller */
}
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (instancetype)initWithUTF16String: (const OFChar16 *)string
length: (size_t)length
byteOrder: (OFByteOrder)byteOrder
{
self = [super init];
@try {
size_t j;
bool swap = false;
if (length > 0 && *string == 0xFEFF) {
string++;
length--;
} else if (length > 0 && *string == 0xFFFE) {
swap = true;
string++;
length--;
} else if (byteOrder != OFByteOrderNative)
swap = true;
_s = &_storage;
_s->cString = OFAllocMemory((length * 4) + 1, 1);
_s->length = length;
_s->freeWhenDone = true;
j = 0;
for (size_t i = 0; i < length; i++) {
OFUnichar character =
(swap ? OFByteSwap16(string[i]) : string[i]);
size_t len;
/* Missing high surrogate */
if ((character & 0xFC00) == 0xDC00)
@throw [OFInvalidEncodingException exception];
if ((character & 0xFC00) == 0xD800) {
OFChar16 nextCharacter;
if (length <= i + 1)
@throw [OFInvalidEncodingException
exception];
nextCharacter = (swap
? OFByteSwap16(string[i + 1])
: string[i + 1]);
if ((nextCharacter & 0xFC00) != 0xDC00)
@throw [OFInvalidEncodingException
exception];
character = (((character & 0x3FF) << 10) |
(nextCharacter & 0x3FF)) + 0x10000;
i++;
_s->length--;
}
len = OFUTF8StringEncode(character, _s->cString + j);
if (len == 0)
@throw [OFInvalidEncodingException exception];
if (len > 1)
_s->isUTF8 = true;
j += len;
}
_s->cString[j] = '\0';
_s->cStringLength = j;
@try {
_s->cString = OFResizeMemory(_s->cString, j + 1, 1);
} @catch (OFOutOfMemoryException *e) {
/* We don't care, as we only tried to make it smaller */
}
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (instancetype)initWithUTF32String: (const OFChar32 *)characters
length: (size_t)length
byteOrder: (OFByteOrder)byteOrder
{
self = [super init];
@try {
size_t j;
bool swap = false;
if (length > 0 && *characters == 0xFEFF) {
characters++;
length--;
} else if (length > 0 && *characters == 0xFFFE0000) {
swap = true;
characters++;
length--;
} else if (byteOrder != OFByteOrderNative)
swap = true;
_s = &_storage;
_s->cString = OFAllocMemory((length * 4) + 1, 1);
_s->length = length;
_s->freeWhenDone = true;
j = 0;
for (size_t i = 0; i < length; i++) {
char buffer[4];
size_t len = OFUTF8StringEncode((swap
? OFByteSwap32(characters[i])
: characters[i]),
buffer);
switch (len) {
case 1:
_s->cString[j++] = buffer[0];
break;
case 2:
case 3:
case 4:
_s->isUTF8 = true;
memcpy(_s->cString + j, buffer, len);
j += len;
break;
default:
@throw [OFInvalidEncodingException exception];
}
}
_s->cString[j] = '\0';
_s->cStringLength = j;
@try {
_s->cString = OFResizeMemory(_s->cString, j + 1, 1);
} @catch (OFOutOfMemoryException *e) {
/* We don't care, as we only tried to make it smaller */
}
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (instancetype)initWithFormat: (OFConstantString *)format
arguments: (va_list)arguments
{
self = [super init];
@try {
char *tmp;
int cStringLength;
if (format == nil)
@throw [OFInvalidArgumentException exception];
_s = &_storage;
if ((cStringLength = OFVASPrintF(&tmp, format.UTF8String,
arguments)) == -1)
@throw [OFInvalidFormatException exception];
_s->cStringLength = cStringLength;
@try {
switch (OFUTF8StringCheck(tmp, cStringLength,
&_s->length)) {
case 1:
_s->isUTF8 = true;
break;
case -1:
@throw [OFInvalidEncodingException exception];
}
_s->cString = OFAllocMemory(cStringLength + 1, 1);
memcpy(_s->cString, tmp, cStringLength + 1);
_s->freeWhenDone = true;
} @finally {
OFFreeMemory(tmp);
}
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (void)dealloc
{
if (_s != NULL && _s->freeWhenDone)
OFFreeMemory(_s->cString);
[super dealloc];
}
- (size_t)getCString: (char *)cString
maxLength: (size_t)maxLength
encoding: (OFStringEncoding)encoding
{
switch (encoding) {
case OFStringEncodingASCII:
if (_s->isUTF8)
@throw [OFInvalidEncodingException exception];
/* intentional fall-through */
case OFStringEncodingUTF8:
if (_s->cStringLength + 1 > maxLength)
@throw [OFOutOfRangeException exception];
memcpy(cString, _s->cString, _s->cStringLength + 1);
return _s->cStringLength;
default:
return [super getCString: cString
maxLength: maxLength
encoding: encoding];
}
}
- (const char *)cStringWithEncoding: (OFStringEncoding)encoding
{
switch (encoding) {
case OFStringEncodingASCII:
if (_s->isUTF8)
@throw [OFInvalidEncodingException exception];
/* intentional fall-through */
case OFStringEncodingUTF8:
return _s->cString;
default:
return [super cStringWithEncoding: encoding];
}
}
- (const char *)UTF8String
{
return _s->cString;
}
- (size_t)length
{
return _s->length;
}
- (size_t)cStringLengthWithEncoding: (OFStringEncoding)encoding
{
switch (encoding) {
case OFStringEncodingUTF8:
case OFStringEncodingASCII:
return _s->cStringLength;
default:
return [super cStringLengthWithEncoding: encoding];
}
}
- (size_t)UTF8StringLength
{
return _s->cStringLength;
}
- (bool)isEqual: (id)object
{
OFUTF8String *string;
if (object == self)
return true;
if (![object isKindOfClass: [OFString class]])
return false;
string = object;
if (string.UTF8StringLength != _s->cStringLength ||
string.length != _s->length)
return false;
if (([string isKindOfClass: [OFUTF8String class]] ||
[string isKindOfClass: [OFMutableUTF8String class]]) &&
_s->hasHash && string->_s->hasHash && _s->hash != string->_s->hash)
return false;
if (strcmp(_s->cString, string.UTF8String) != 0)
return false;
return true;
}
- (OFComparisonResult)compare: (OFString *)string
{
size_t otherCStringLength, minimumCStringLength;
int compare;
if (string == self)
return OFOrderedSame;
if (![string isKindOfClass: [OFString class]])
@throw [OFInvalidArgumentException exception];
otherCStringLength = string.UTF8StringLength;
minimumCStringLength = (_s->cStringLength > otherCStringLength
? otherCStringLength : _s->cStringLength);
if ((compare = memcmp(_s->cString, string.UTF8String,
minimumCStringLength)) == 0) {
if (_s->cStringLength > otherCStringLength)
return OFOrderedDescending;
if (_s->cStringLength < otherCStringLength)
return OFOrderedAscending;
return OFOrderedSame;
}
if (compare > 0)
return OFOrderedDescending;
else
return OFOrderedAscending;
}
- (OFComparisonResult)caseInsensitiveCompare: (OFString *)string
{
const char *otherCString;
size_t otherCStringLength, minimumCStringLength;
#ifdef OF_HAVE_UNICODE_TABLES
size_t i, j;
#endif
int compare;
if (string == self)
return OFOrderedSame;
otherCString = string.UTF8String;
otherCStringLength = string.UTF8StringLength;
#ifdef OF_HAVE_UNICODE_TABLES
if (!_s->isUTF8) {
#endif
minimumCStringLength = (_s->cStringLength > otherCStringLength
? otherCStringLength : _s->cStringLength);
if ((compare = memcasecmp(_s->cString, otherCString,
minimumCStringLength)) == 0) {
if (_s->cStringLength > otherCStringLength)
return OFOrderedDescending;
if (_s->cStringLength < otherCStringLength)
return OFOrderedAscending;
return OFOrderedSame;
}
if (compare > 0)
return OFOrderedDescending;
else
return OFOrderedAscending;
#ifdef OF_HAVE_UNICODE_TABLES
}
i = j = 0;
while (i < _s->cStringLength && j < otherCStringLength) {
OFUnichar c1, c2;
ssize_t l1, l2;
l1 = OFUTF8StringDecode(_s->cString + i,
_s->cStringLength - i, &c1);
l2 = OFUTF8StringDecode(otherCString + j,
otherCStringLength - j, &c2);
if (l1 <= 0 || l2 <= 0 || c1 > 0x10FFFF || c2 > 0x10FFFF)
@throw [OFInvalidEncodingException exception];
if (c1 >> 8 < OFUnicodeCaseFoldingTableSize) {
OFUnichar tc =
OFUnicodeCaseFoldingTable[c1 >> 8][c1 & 0xFF];
if (tc)
c1 = tc;
}
if (c2 >> 8 < OFUnicodeCaseFoldingTableSize) {
OFUnichar tc =
OFUnicodeCaseFoldingTable[c2 >> 8][c2 & 0xFF];
if (tc)
c2 = tc;
}
if (c1 > c2)
return OFOrderedDescending;
if (c1 < c2)
return OFOrderedAscending;
i += l1;
j += l2;
}
if (_s->cStringLength - i > otherCStringLength - j)
return OFOrderedDescending;
else if (_s->cStringLength - i < otherCStringLength - j)
return OFOrderedAscending;
#endif
return OFOrderedSame;
}
- (unsigned long)hash
{
unsigned long hash;
if (_s->hasHash)
return _s->hash;
OFHashInit(&hash);
for (size_t i = 0; i < _s->cStringLength; i++) {
OFUnichar c;
ssize_t length;
if ((length = OFUTF8StringDecode(_s->cString + i,
_s->cStringLength - i, &c)) <= 0)
@throw [OFInvalidEncodingException exception];
OFHashAddByte(&hash, (c & 0xFF0000) >> 16);
OFHashAddByte(&hash, (c & 0x00FF00) >> 8);
OFHashAddByte(&hash, c & 0x0000FF);
i += length - 1;
}
OFHashFinalize(&hash);
_s->hash = hash;
_s->hasHash = true;
return hash;
}
- (OFUnichar)characterAtIndex: (size_t)idx
{
OFUnichar character;
if (idx >= _s->length)
@throw [OFOutOfRangeException exception];
if (!_s->isUTF8)
return _s->cString[idx];
idx = OFUTF8StringIndexToPosition(_s->cString, idx, _s->cStringLength);
if (OFUTF8StringDecode(_s->cString + idx, _s->cStringLength - idx,
&character) <= 0)
@throw [OFInvalidEncodingException exception];
return character;
}
- (void)getCharacters: (OFUnichar *)buffer inRange: (OFRange)range
{
/* TODO: Could be slightly optimized */
void *pool = objc_autoreleasePoolPush();
const OFUnichar *characters = self.characters;
if (range.length > SIZE_MAX - range.location ||
range.location + range.length > _s->length)
@throw [OFOutOfRangeException exception];
memcpy(buffer, characters + range.location,
range.length * sizeof(OFUnichar));
objc_autoreleasePoolPop(pool);
}
- (OFRange)rangeOfString: (OFString *)string
options: (OFStringSearchOptions)options
range: (OFRange)range
{
const char *cString = string.UTF8String;
size_t cStringLength = string.UTF8StringLength;
size_t rangeLocation, rangeLength;
if (range.length > SIZE_MAX - range.location ||
range.location + range.length > _s->length)
@throw [OFOutOfRangeException exception];
if (_s->isUTF8) {
rangeLocation = OFUTF8StringIndexToPosition(
_s->cString, range.location, _s->cStringLength);
rangeLength = OFUTF8StringIndexToPosition(
_s->cString + rangeLocation, range.length,
_s->cStringLength - rangeLocation);
} else {
rangeLocation = range.location;
rangeLength = range.length;
}
if (cStringLength == 0)
return OFMakeRange(0, 0);
if (cStringLength > rangeLength)
return OFMakeRange(OFNotFound, 0);
if (options & OFStringSearchBackwards) {
for (size_t i = rangeLength - cStringLength;; i--) {
if (memcmp(_s->cString + rangeLocation + i, cString,
cStringLength) == 0) {
range.location += positionToIndex(
_s->cString + rangeLocation, i);
range.length = string.length;
return range;
}
/* Did not match and we're at the last char */
if (i == 0)
return OFMakeRange(OFNotFound, 0);
}
} else {
for (size_t i = 0; i <= rangeLength - cStringLength; i++) {
if (memcmp(_s->cString + rangeLocation + i, cString,
cStringLength) == 0) {
range.location += positionToIndex(
_s->cString + rangeLocation, i);
range.length = string.length;
return range;
}
}
}
return OFMakeRange(OFNotFound, 0);
}
- (bool)containsString: (OFString *)string
{
const char *cString = string.UTF8String;
size_t cStringLength = string.UTF8StringLength;
if (cStringLength == 0)
return true;
if (cStringLength > _s->cStringLength)
return false;
for (size_t i = 0; i <= _s->cStringLength - cStringLength; i++)
if (memcmp(_s->cString + i, cString, cStringLength) == 0)
return true;
return false;
}
- (OFString *)substringWithRange: (OFRange)range
{
size_t start = range.location;
size_t end = range.location + range.length;
if (range.length > SIZE_MAX - range.location || end > _s->length)
@throw [OFOutOfRangeException exception];
if (_s->isUTF8) {
start = OFUTF8StringIndexToPosition(_s->cString, start,
_s->cStringLength);
end = OFUTF8StringIndexToPosition(_s->cString, end,
_s->cStringLength);
}
return [OFString stringWithUTF8String: _s->cString + start
length: end - start];
}
- (bool)hasPrefix: (OFString *)prefix
{
size_t cStringLength = prefix.UTF8StringLength;
if (cStringLength > _s->cStringLength)
return false;
return (memcmp(_s->cString, prefix.UTF8String, cStringLength) == 0);
}
- (bool)hasSuffix: (OFString *)suffix
{
size_t cStringLength = suffix.UTF8StringLength;
if (cStringLength > _s->cStringLength)
return false;
return (memcmp(_s->cString + (_s->cStringLength - cStringLength),
suffix.UTF8String, cStringLength) == 0);
}
- (OFArray *)componentsSeparatedByString: (OFString *)delimiter
options: (OFStringSeparationOptions)options
{
void *pool;
OFMutableArray *array;
const char *cString;
size_t cStringLength;
bool skipEmpty = (options & OFStringSkipEmptyComponents);
size_t last;
OFString *component;
if (delimiter == nil)
@throw [OFInvalidArgumentException exception];
if (delimiter.length == 0)
return [OFArray arrayWithObject: self];
array = [OFMutableArray array];
pool = objc_autoreleasePoolPush();
cString = delimiter.UTF8String;
cStringLength = delimiter.UTF8StringLength;
if (cStringLength > _s->cStringLength) {
[array addObject: [[self copy] autorelease]];
objc_autoreleasePoolPop(pool);
return array;
}
last = 0;
for (size_t i = 0; i <= _s->cStringLength - cStringLength; i++) {
if (memcmp(_s->cString + i, cString, cStringLength) != 0)
continue;
component = [OFString stringWithUTF8String: _s->cString + last
length: i - last];
if (!skipEmpty || component.length > 0)
[array addObject: component];
i += cStringLength - 1;
last = i + 1;
}
component = [OFString stringWithUTF8String: _s->cString + last];
if (!skipEmpty || component.length > 0)
[array addObject: component];
[array makeImmutable];
objc_autoreleasePoolPop(pool);
return array;
}
- (const OFUnichar *)characters
{
OFUnichar *buffer = OFAllocMemory(_s->length, sizeof(OFUnichar));
size_t i = 0, j = 0;
const OFUnichar *ret;
while (i < _s->cStringLength) {
OFUnichar c;
ssize_t cLen;
cLen = OFUTF8StringDecode(_s->cString + i,
_s->cStringLength - i, &c);
if (cLen <= 0 || c > 0x10FFFF) {
OFFreeMemory(buffer);
@throw [OFInvalidEncodingException exception];
}
buffer[j++] = c;
i += cLen;
}
@try {
ret = [[OFData dataWithItemsNoCopy: buffer
count: _s->length
itemSize: sizeof(OFUnichar)
freeWhenDone: true] items];
} @catch (id e) {
OFFreeMemory(buffer);
@throw e;
}
return ret;
}
- (const OFChar32 *)UTF32StringWithByteOrder: (OFByteOrder)byteOrder
{
OFChar32 *buffer = OFAllocMemory(_s->length + 1, sizeof(OFChar32));
size_t i = 0, j = 0;
const OFChar32 *ret;
while (i < _s->cStringLength) {
OFChar32 c;
ssize_t cLen;
cLen = OFUTF8StringDecode(_s->cString + i,
_s->cStringLength - i, &c);
if (cLen <= 0 || c > 0x10FFFF) {
OFFreeMemory(buffer);
@throw [OFInvalidEncodingException exception];
}
if (byteOrder != OFByteOrderNative)
buffer[j++] = OFByteSwap32(c);
else
buffer[j++] = c;
i += cLen;
}
buffer[j] = 0;
@try {
ret = [[OFData dataWithItemsNoCopy: buffer
count: _s->length + 1
itemSize: sizeof(OFChar32)
freeWhenDone: true] items];
} @catch (id e) {
OFFreeMemory(buffer);
@throw e;
}
return ret;
}
#ifdef OF_HAVE_BLOCKS
- (void)enumerateLinesUsingBlock: (OFStringLineEnumerationBlock)block
{
void *pool;
const char *cString = _s->cString;
const char *last = cString;
bool stop = false, lastCarriageReturn = false;
while (!stop && *cString != 0) {
if (lastCarriageReturn && *cString == '\n') {
lastCarriageReturn = false;
cString++;
last++;
continue;
}
if (*cString == '\n' || *cString == '\r') {
pool = objc_autoreleasePoolPush();
block([OFString stringWithUTF8String: last
length: cString - last],
&stop);
last = cString + 1;
objc_autoreleasePoolPop(pool);
}
lastCarriageReturn = (*cString == '\r');
cString++;
}
pool = objc_autoreleasePoolPush();
if (!stop)
block([OFString stringWithUTF8String: last
length: cString - last], &stop);
objc_autoreleasePoolPop(pool);
}
#endif
@end