/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017,
* 2018, 2019
* Jonathan Schleifer <js@heap.zone>
*
* All rights reserved.
*
* This file is part of ObjFW. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE.QPL included in
* the packaging of this file.
*
* Alternatively, it may be distributed under the terms of the GNU General
* Public License, either version 2 or 3, which can be found in the file
* LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
* file.
*/
#include "config.h"
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#ifdef OF_HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#import "OFString_UTF8.h"
#import "OFString_UTF8+Private.h"
#import "OFMutableString_UTF8.h"
#import "OFArray.h"
#import "OFInitializationFailedException.h"
#import "OFInvalidArgumentException.h"
#import "OFInvalidEncodingException.h"
#import "OFInvalidFormatException.h"
#import "OFOutOfMemoryException.h"
#import "OFOutOfRangeException.h"
#import "of_asprintf.h"
#import "unicode.h"
extern const of_char16_t of_iso_8859_2_table[];
extern const size_t of_iso_8859_2_table_offset;
extern const of_char16_t of_iso_8859_3_table[];
extern const size_t of_iso_8859_3_table_offset;
extern const of_char16_t of_iso_8859_15_table[];
extern const size_t of_iso_8859_15_table_offset;
extern const of_char16_t of_windows_1251_table[];
extern const size_t of_windows_1251_table_offset;
extern const of_char16_t of_windows_1252_table[];
extern const size_t of_windows_1252_table_offset;
extern const of_char16_t of_codepage_437_table[];
extern const size_t of_codepage_437_table_offset;
extern const of_char16_t of_codepage_850_table[];
extern const size_t of_codepage_850_table_offset;
extern const of_char16_t of_codepage_858_table[];
extern const size_t of_codepage_858_table_offset;
extern const of_char16_t of_mac_roman_table[];
extern const size_t of_mac_roman_table_offset;
extern const of_char16_t of_koi8_r_table[];
extern const size_t of_koi8_r_table_offset;
extern const of_char16_t of_koi8_u_table[];
extern const size_t of_koi8_u_table_offset;
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 = of_ascii_toupper(f);
s = of_ascii_toupper(s);
if (f > s)
return OF_ORDERED_DESCENDING;
if (f < s)
return OF_ORDERED_ASCENDING;
}
return OF_ORDERED_SAME;
}
int
of_string_utf8_check(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
of_string_utf8_get_index(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
of_string_utf8_get_position(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)
return OF_NOT_FOUND;
return idx;
}
@implementation OFString_UTF8
- (instancetype)init
{
self = [super init];
@try {
_s = &_storage;
_s->cString = [self allocMemoryWithSize: 1];
_s->cString[0] = '\0';
} @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 (of_string_utf8_check(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: (of_string_encoding_t)encoding
length: (size_t)cStringLength
{
self = [super init];
@try {
const of_char16_t *table;
size_t tableOffset, j;
if (encoding == OF_STRING_ENCODING_UTF_8 &&
cStringLength >= 3 &&
memcmp(cString, "\xEF\xBB\xBF", 3) == 0) {
cString += 3;
cStringLength -= 3;
}
_s = &_storage;
_s->cString = [self allocMemoryWithSize: cStringLength + 1];
_s->cStringLength = cStringLength;
if (encoding == OF_STRING_ENCODING_UTF_8 ||
encoding == OF_STRING_ENCODING_ASCII) {
switch (of_string_utf8_check(cString, cStringLength,
&_s->length)) {
case 1:
if (encoding == OF_STRING_ENCODING_ASCII)
@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 == OF_STRING_ENCODING_ISO_8859_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 = of_string_utf8_encode(
(uint8_t)cString[i], buffer);
if (bytes == 0)
@throw [OFInvalidEncodingException
exception];
_s->cStringLength += bytes - 1;
_s->cString = [self
resizeMemory: _s->cString
size: _s->cStringLength + 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(OF_STRING_ENCODING_ISO_8859_2, of_iso_8859_2_table)
#endif
#ifdef HAVE_ISO_8859_3
CASE(OF_STRING_ENCODING_ISO_8859_3, of_iso_8859_3_table)
#endif
#ifdef HAVE_ISO_8859_15
CASE(OF_STRING_ENCODING_ISO_8859_15, of_iso_8859_15_table)
#endif
#ifdef HAVE_WINDOWS_1251
CASE(OF_STRING_ENCODING_WINDOWS_1251, of_windows_1251_table)
#endif
#ifdef HAVE_WINDOWS_1252
CASE(OF_STRING_ENCODING_WINDOWS_1252, of_windows_1252_table)
#endif
#ifdef HAVE_CODEPAGE_437
CASE(OF_STRING_ENCODING_CODEPAGE_437, of_codepage_437_table)
#endif
#ifdef HAVE_CODEPAGE_850
CASE(OF_STRING_ENCODING_CODEPAGE_850, of_codepage_850_table)
#endif
#ifdef HAVE_CODEPAGE_858
CASE(OF_STRING_ENCODING_CODEPAGE_858, of_codepage_858_table)
#endif
#ifdef HAVE_MAC_ROMAN
CASE(OF_STRING_ENCODING_MAC_ROMAN, of_mac_roman_table)
#endif
#ifdef HAVE_KOI8_R
CASE(OF_STRING_ENCODING_KOI8_R, of_koi8_r_table)
#endif
#ifdef HAVE_KOI8_U
CASE(OF_STRING_ENCODING_KOI8_U, of_koi8_u_table)
#endif
#undef CASE
default:
@throw [OFInvalidEncodingException exception];
}
j = 0;
for (size_t i = 0; i < cStringLength; i++) {
unsigned char character = (unsigned char)cString[i];
of_unichar_t 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 = of_string_utf8_encode(unichar, buffer);
if (byteLength == 0)
@throw [OFInvalidEncodingException exception];
_s->cStringLength += byteLength - 1;
_s->cString = [self
resizeMemory: _s->cString
size: _s->cStringLength + 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
{
@try {
self = [super init];
} @catch (id e) {
if (freeWhenDone)
free(UTF8String);
@throw e;
}
@try {
_s = &_storage;
if (freeWhenDone)
_s->freeWhenDone = UTF8String;
if (UTF8StringLength >= 3 &&
memcmp(UTF8String, "\xEF\xBB\xBF", 3) == 0) {
UTF8String += 3;
UTF8StringLength -= 3;
}
_s->cString = (char *)UTF8String;
_s->cStringLength = UTF8StringLength;
switch (of_string_utf8_check(UTF8String, UTF8StringLength,
&_s->length)) {
case 1:
_s->isUTF8 = true;
break;
case -1:
@throw [OFInvalidEncodingException exception];
}
} @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: [OFString_UTF8 class]] ||
[string isKindOfClass: [OFMutableString_UTF8 class]])
_s->isUTF8 = ((OFString_UTF8 *)string)->_s->isUTF8;
else
_s->isUTF8 = true;
_s->length = [string length];
_s->cString = [self allocMemoryWithSize: _s->cStringLength + 1];
memcpy(_s->cString, [string UTF8String], _s->cStringLength + 1);
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (instancetype)initWithCharacters: (const of_unichar_t *)characters
length: (size_t)length
{
self = [super init];
@try {
size_t j;
_s = &_storage;
_s->cString = [self allocMemoryWithSize: (length * 4) + 1];
_s->length = length;
j = 0;
for (size_t i = 0; i < length; i++) {
size_t len = of_string_utf8_encode(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 = [self resizeMemory: _s->cString
size: j + 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 of_char16_t *)string
length: (size_t)length
byteOrder: (of_byte_order_t)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 != OF_BYTE_ORDER_NATIVE)
swap = true;
_s = &_storage;
_s->cString = [self allocMemoryWithSize: (length * 4) + 1];
_s->length = length;
j = 0;
for (size_t i = 0; i < length; i++) {
of_unichar_t character =
(swap ? OF_BSWAP16(string[i]) : string[i]);
size_t len;
/* Missing high surrogate */
if ((character & 0xFC00) == 0xDC00)
@throw [OFInvalidEncodingException exception];
if ((character & 0xFC00) == 0xD800) {
of_char16_t nextCharacter;
if (length <= i + 1)
@throw [OFInvalidEncodingException
exception];
nextCharacter = (swap
? OF_BSWAP16(string[i + 1])
: string[i + 1]);
if ((nextCharacter & 0xFC00) != 0xDC00)
@throw [OFInvalidEncodingException
exception];
character = (((character & 0x3FF) << 10) |
(nextCharacter & 0x3FF)) + 0x10000;
i++;
_s->length--;
}
len = of_string_utf8_encode(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 = [self resizeMemory: _s->cString
size: j + 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 of_char32_t *)characters
length: (size_t)length
byteOrder: (of_byte_order_t)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 != OF_BYTE_ORDER_NATIVE)
swap = true;
_s = &_storage;
_s->cString = [self allocMemoryWithSize: (length * 4) + 1];
_s->length = length;
j = 0;
for (size_t i = 0; i < length; i++) {
char buffer[4];
size_t len = of_string_utf8_encode(
(swap ? OF_BSWAP32(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 = [self resizeMemory: _s->cString
size: j + 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 = of_vasprintf(&tmp, [format UTF8String],
arguments)) == -1)
@throw [OFInvalidFormatException exception];
_s->cStringLength = cStringLength;
@try {
switch (of_string_utf8_check(tmp, cStringLength,
&_s->length)) {
case 1:
_s->isUTF8 = true;
break;
case -1:
@throw [OFInvalidEncodingException exception];
}
_s->cString = [self
allocMemoryWithSize: cStringLength + 1];
memcpy(_s->cString, tmp, cStringLength + 1);
} @finally {
free(tmp);
}
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (void)dealloc
{
if (_s != NULL && _s->freeWhenDone != NULL)
free(_s->freeWhenDone);
[super dealloc];
}
- (size_t)getCString: (char *)cString
maxLength: (size_t)maxLength
encoding: (of_string_encoding_t)encoding
{
switch (encoding) {
case OF_STRING_ENCODING_ASCII:
if (_s->isUTF8)
@throw [OFInvalidEncodingException exception];
/* intentional fall-through */
case OF_STRING_ENCODING_UTF_8:
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: (of_string_encoding_t)encoding
{
switch (encoding) {
case OF_STRING_ENCODING_ASCII:
if (_s->isUTF8)
@throw [OFInvalidEncodingException exception];
/* intentional fall-through */
case OF_STRING_ENCODING_UTF_8:
return _s->cString;
default:
return [super cStringWithEncoding: encoding];
}
}
- (const char *)UTF8String
{
return _s->cString;
}
- (size_t)length
{
return _s->length;
}
- (size_t)cStringLengthWithEncoding: (of_string_encoding_t)encoding
{
switch (encoding) {
case OF_STRING_ENCODING_UTF_8:
case OF_STRING_ENCODING_ASCII:
return _s->cStringLength;
default:
return [super cStringLengthWithEncoding: encoding];
}
}
- (size_t)UTF8StringLength
{
return _s->cStringLength;
}
- (bool)isEqual: (id)object
{
OFString_UTF8 *otherString;
if (object == self)
return true;
if (![object isKindOfClass: [OFString class]])
return false;
otherString = object;
if ([otherString UTF8StringLength] != _s->cStringLength ||
[otherString length] != _s->length)
return false;
if (([otherString isKindOfClass: [OFString_UTF8 class]] ||
[otherString isKindOfClass: [OFMutableString_UTF8 class]]) &&
_s->hashed && otherString->_s->hashed &&
_s->hash != otherString->_s->hash)
return false;
if (strcmp(_s->cString, [otherString UTF8String]) != 0)
return false;
return true;
}
- (of_comparison_result_t)compare: (id <OFComparing>)object
{
OFString *otherString;
size_t otherCStringLength, minimumCStringLength;
int compare;
if (object == self)
return OF_ORDERED_SAME;
if (![(id)object isKindOfClass: [OFString class]])
@throw [OFInvalidArgumentException exception];
otherString = (OFString *)object;
otherCStringLength = [otherString UTF8StringLength];
minimumCStringLength = (_s->cStringLength > otherCStringLength
? otherCStringLength : _s->cStringLength);
if ((compare = memcmp(_s->cString, [otherString UTF8String],
minimumCStringLength)) == 0) {
if (_s->cStringLength > otherCStringLength)
return OF_ORDERED_DESCENDING;
if (_s->cStringLength < otherCStringLength)
return OF_ORDERED_ASCENDING;
return OF_ORDERED_SAME;
}
if (compare > 0)
return OF_ORDERED_DESCENDING;
else
return OF_ORDERED_ASCENDING;
}
- (of_comparison_result_t)caseInsensitiveCompare: (OFString *)otherString
{
const char *otherCString;
size_t otherCStringLength, minimumCStringLength;
#ifdef OF_HAVE_UNICODE_TABLES
size_t i, j;
#endif
int compare;
if (otherString == self)
return OF_ORDERED_SAME;
if (![otherString isKindOfClass: [OFString class]])
@throw [OFInvalidArgumentException exception];
otherCString = [otherString UTF8String];
otherCStringLength = [otherString 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 OF_ORDERED_DESCENDING;
if (_s->cStringLength < otherCStringLength)
return OF_ORDERED_ASCENDING;
return OF_ORDERED_SAME;
}
if (compare > 0)
return OF_ORDERED_DESCENDING;
else
return OF_ORDERED_ASCENDING;
#ifdef OF_HAVE_UNICODE_TABLES
}
i = j = 0;
while (i < _s->cStringLength && j < otherCStringLength) {
of_unichar_t c1, c2;
ssize_t l1, l2;
l1 = of_string_utf8_decode(_s->cString + i,
_s->cStringLength - i, &c1);
l2 = of_string_utf8_decode(otherCString + j,
otherCStringLength - j, &c2);
if (l1 <= 0 || l2 <= 0 || c1 > 0x10FFFF || c2 > 0x10FFFF)
@throw [OFInvalidEncodingException exception];
if (c1 >> 8 < OF_UNICODE_CASEFOLDING_TABLE_SIZE) {
of_unichar_t tc =
of_unicode_casefolding_table[c1 >> 8][c1 & 0xFF];
if (tc)
c1 = tc;
}
if (c2 >> 8 < OF_UNICODE_CASEFOLDING_TABLE_SIZE) {
of_unichar_t tc =
of_unicode_casefolding_table[c2 >> 8][c2 & 0xFF];
if (tc)
c2 = tc;
}
if (c1 > c2)
return OF_ORDERED_DESCENDING;
if (c1 < c2)
return OF_ORDERED_ASCENDING;
i += l1;
j += l2;
}
if (_s->cStringLength - i > otherCStringLength - j)
return OF_ORDERED_DESCENDING;
else if (_s->cStringLength - i < otherCStringLength - j)
return OF_ORDERED_ASCENDING;
#endif
return OF_ORDERED_SAME;
}
- (uint32_t)hash
{
uint32_t hash;
if (_s->hashed)
return _s->hash;
OF_HASH_INIT(hash);
for (size_t i = 0; i < _s->cStringLength; i++) {
of_unichar_t c;
ssize_t length;
if ((length = of_string_utf8_decode(_s->cString + i,
_s->cStringLength - i, &c)) <= 0)
@throw [OFInvalidEncodingException exception];
OF_HASH_ADD(hash, (c & 0xFF0000) >> 16);
OF_HASH_ADD(hash, (c & 0x00FF00) >> 8);
OF_HASH_ADD(hash, c & 0x0000FF);
i += length - 1;
}
OF_HASH_FINALIZE(hash);
_s->hash = hash;
_s->hashed = true;
return hash;
}
- (of_unichar_t)characterAtIndex: (size_t)idx
{
of_unichar_t character;
if (idx >= _s->length)
@throw [OFOutOfRangeException exception];
if (!_s->isUTF8)
return _s->cString[idx];
idx = of_string_utf8_get_position(_s->cString, idx, _s->cStringLength);
if (of_string_utf8_decode(_s->cString + idx,
_s->cStringLength - idx, &character) <= 0)
@throw [OFInvalidEncodingException exception];
return character;
}
- (void)getCharacters: (of_unichar_t *)buffer
inRange: (of_range_t)range
{
/* TODO: Could be slightly optimized */
void *pool = objc_autoreleasePoolPush();
const of_unichar_t *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(of_unichar_t));
objc_autoreleasePoolPop(pool);
}
- (of_range_t)rangeOfString: (OFString *)string
options: (int)options
range: (of_range_t)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 = of_string_utf8_get_position(
_s->cString, range.location, _s->cStringLength);
rangeLength = of_string_utf8_get_position(
_s->cString + rangeLocation, range.length,
_s->cStringLength - rangeLocation);
} else {
rangeLocation = range.location;
rangeLength = range.length;
}
if (cStringLength == 0)
return of_range(0, 0);
if (cStringLength > rangeLength)
return of_range(OF_NOT_FOUND, 0);
if (options & OF_STRING_SEARCH_BACKWARDS) {
for (size_t i = rangeLength - cStringLength;; i--) {
if (memcmp(_s->cString + rangeLocation + i, cString,
cStringLength) == 0) {
range.location += of_string_utf8_get_index(
_s->cString + rangeLocation, i);
range.length = [string length];
return range;
}
/* Did not match and we're at the last char */
if (i == 0)
return of_range(OF_NOT_FOUND, 0);
}
} else {
for (size_t i = 0; i <= rangeLength - cStringLength; i++) {
if (memcmp(_s->cString + rangeLocation + i, cString,
cStringLength) == 0) {
range.location += of_string_utf8_get_index(
_s->cString + rangeLocation, i);
range.length = [string length];
return range;
}
}
}
return of_range(OF_NOT_FOUND, 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: (of_range_t)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 = of_string_utf8_get_position(_s->cString, start,
_s->cStringLength);
end = of_string_utf8_get_position(_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: (int)options
{
void *pool;
OFMutableArray *array;
const char *cString = [delimiter UTF8String];
size_t cStringLength = [delimiter UTF8StringLength];
bool skipEmpty = (options & OF_STRING_SKIP_EMPTY);
size_t last;
OFString *component;
array = [OFMutableArray array];
pool = objc_autoreleasePoolPush();
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 of_unichar_t *)characters
{
OFObject *object = [[[OFObject alloc] init] autorelease];
of_unichar_t *ret;
size_t i, j;
ret = [object allocMemoryWithSize: sizeof(of_unichar_t)
count: _s->length];
i = j = 0;
while (i < _s->cStringLength) {
of_unichar_t c;
ssize_t cLen;
cLen = of_string_utf8_decode(_s->cString + i,
_s->cStringLength - i, &c);
if (cLen <= 0 || c > 0x10FFFF)
@throw [OFInvalidEncodingException exception];
ret[j++] = c;
i += cLen;
}
return ret;
}
- (const of_char32_t *)UTF32StringWithByteOrder: (of_byte_order_t)byteOrder
{
OFObject *object = [[[OFObject alloc] init] autorelease];
of_char32_t *ret;
size_t i, j;
ret = [object allocMemoryWithSize: sizeof(of_unichar_t)
count: _s->length + 1];
i = j = 0;
while (i < _s->cStringLength) {
of_unichar_t c;
ssize_t cLen;
cLen = of_string_utf8_decode(_s->cString + i,
_s->cStringLength - i, &c);
if (cLen <= 0 || c > 0x10FFFF)
@throw [OFInvalidEncodingException exception];
if (byteOrder != OF_BYTE_ORDER_NATIVE)
ret[j++] = OF_BSWAP32(c);
else
ret[j++] = c;
i += cLen;
}
ret[j] = 0;
return ret;
}
#ifdef OF_HAVE_BLOCKS
- (void)enumerateLinesUsingBlock: (of_string_line_enumeration_block_t)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