/*
* 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>
#include <assert.h>
#import "OFMutableUTF8String.h"
#import "OFString.h"
#import "OFUTF8String.h"
#import "OFInvalidArgumentException.h"
#import "OFInvalidEncodingException.h"
#import "OFInvalidFormatException.h"
#import "OFOutOfMemoryException.h"
#import "OFOutOfRangeException.h"
#import "of_asprintf.h"
#import "unicode.h"
@implementation OFMutableUTF8String
+ (void)initialize
{
if (self == [OFMutableUTF8String class])
[self inheritMethodsFromClass: [OFUTF8String class]];
}
- (instancetype)initWithUTF8StringNoCopy: (char *)UTF8String
freeWhenDone: (bool)freeWhenDone
{
@try {
self = [self initWithUTF8String: UTF8String];
} @finally {
if (freeWhenDone)
free(UTF8String);
}
return self;
}
- (instancetype)initWithUTF8StringNoCopy: (char *)UTF8String
length: (size_t)UTF8StringLength
freeWhenDone: (bool)freeWhenDone
{
@try {
self = [self initWithUTF8String: UTF8String
length: UTF8StringLength];
} @finally {
if (freeWhenDone)
free(UTF8String);
}
return self;
}
- (void)of_convertWithWordStartTable: (const of_unichar_t *const[])startTable
wordMiddleTable: (const of_unichar_t *const[])middleTable
wordStartTableSize: (size_t)startTableSize
wordMiddleTableSize: (size_t)middleTableSize
{
of_unichar_t *unicodeString;
size_t unicodeLen, newCStringLength;
size_t i, j;
char *newCString;
bool isStart = true;
if (!_s->isUTF8) {
uint8_t t;
const of_unichar_t *const *table;
assert(startTableSize >= 1 && middleTableSize >= 1);
_s->hashed = false;
for (i = 0; i < _s->cStringLength; i++) {
if (isStart)
table = startTable;
else
table = middleTable;
isStart = of_ascii_isspace(_s->cString[i]);
if ((t = table[0][(uint8_t)_s->cString[i]]) != 0)
_s->cString[i] = t;
}
return;
}
unicodeLen = self.length;
unicodeString = [self allocMemoryWithSize: sizeof(of_unichar_t)
count: unicodeLen];
i = j = 0;
newCStringLength = 0;
while (i < _s->cStringLength) {
const of_unichar_t *const *table;
size_t tableSize;
of_unichar_t c;
ssize_t cLen;
if (isStart) {
table = startTable;
tableSize = middleTableSize;
} else {
table = middleTable;
tableSize = middleTableSize;
}
cLen = of_string_utf8_decode(_s->cString + i,
_s->cStringLength - i, &c);
if (cLen <= 0 || c > 0x10FFFF) {
[self freeMemory: unicodeString];
@throw [OFInvalidEncodingException exception];
}
isStart = of_ascii_isspace(c);
if (c >> 8 < tableSize) {
of_unichar_t tc = table[c >> 8][c & 0xFF];
if (tc)
c = tc;
}
unicodeString[j++] = c;
if (c < 0x80)
newCStringLength++;
else if (c < 0x800)
newCStringLength += 2;
else if (c < 0x10000)
newCStringLength += 3;
else if (c < 0x110000)
newCStringLength += 4;
else {
[self freeMemory: unicodeString];
@throw [OFInvalidEncodingException exception];
}
i += cLen;
}
@try {
newCString = [self allocMemoryWithSize: newCStringLength + 1];
} @catch (id e) {
[self freeMemory: unicodeString];
@throw e;
}
j = 0;
for (i = 0; i < unicodeLen; i++) {
size_t d;
if ((d = of_string_utf8_encode(unicodeString[i],
newCString + j)) == 0) {
[self freeMemory: unicodeString];
[self freeMemory: newCString];
@throw [OFInvalidEncodingException exception];
}
j += d;
}
assert(j == newCStringLength);
newCString[j] = 0;
[self freeMemory: unicodeString];
[self freeMemory: _s->cString];
_s->hashed = false;
_s->cString = newCString;
_s->cStringLength = newCStringLength;
/*
* Even though cStringLength can change, length cannot, therefore no
* need to change it.
*/
}
- (void)setCharacter: (of_unichar_t)character
atIndex: (size_t)idx
{
char buffer[4];
of_unichar_t c;
size_t lenNew;
ssize_t lenOld;
if (_s->isUTF8)
idx = of_string_utf8_get_position(_s->cString, idx,
_s->cStringLength);
if (idx >= _s->cStringLength)
@throw [OFOutOfRangeException exception];
/* Shortcut if old and new character both are ASCII */
if (character < 0x80 && !(_s->cString[idx] & 0x80)) {
_s->hashed = false;
_s->cString[idx] = character;
return;
}
if ((lenNew = of_string_utf8_encode(character, buffer)) == 0)
@throw [OFInvalidEncodingException exception];
if ((lenOld = of_string_utf8_decode(_s->cString + idx,
_s->cStringLength - idx, &c)) <= 0)
@throw [OFInvalidEncodingException exception];
_s->hashed = false;
if (lenNew == (size_t)lenOld)
memcpy(_s->cString + idx, buffer, lenNew);
else if (lenNew > (size_t)lenOld) {
_s->cString = [self resizeMemory: _s->cString
size: _s->cStringLength -
lenOld + lenNew + 1];
memmove(_s->cString + idx + lenNew, _s->cString + idx + lenOld,
_s->cStringLength - idx - lenOld);
memcpy(_s->cString + idx, buffer, lenNew);
_s->cStringLength -= lenOld;
_s->cStringLength += lenNew;
_s->cString[_s->cStringLength] = '\0';
if (character >= 0x80)
_s->isUTF8 = true;
} else if (lenNew < (size_t)lenOld) {
memmove(_s->cString + idx + lenNew, _s->cString + idx + lenOld,
_s->cStringLength - idx - lenOld);
memcpy(_s->cString + idx, buffer, lenNew);
_s->cStringLength -= lenOld;
_s->cStringLength += lenNew;
_s->cString[_s->cStringLength] = '\0';
if (character >= 0x80)
_s->isUTF8 = true;
@try {
_s->cString = [self
resizeMemory: _s->cString
size: _s->cStringLength + 1];
} @catch (OFOutOfMemoryException *e) {
/* We don't really care, as we only made it smaller */
}
}
}
- (void)appendUTF8String: (const char *)UTF8String
{
size_t UTF8StringLength = strlen(UTF8String);
size_t length;
if (UTF8StringLength >= 3 &&
memcmp(UTF8String, "\xEF\xBB\xBF", 3) == 0) {
UTF8String += 3;
UTF8StringLength -= 3;
}
switch (of_string_utf8_check(UTF8String, UTF8StringLength, &length)) {
case 1:
_s->isUTF8 = true;
break;
case -1:
@throw [OFInvalidEncodingException exception];
}
_s->hashed = false;
_s->cString = [self resizeMemory: _s->cString
size: _s->cStringLength +
UTF8StringLength + 1];
memcpy(_s->cString + _s->cStringLength, UTF8String,
UTF8StringLength + 1);
_s->cStringLength += UTF8StringLength;
_s->length += length;
}
- (void)appendUTF8String: (const char *)UTF8String
length: (size_t)UTF8StringLength
{
size_t length;
if (UTF8StringLength >= 3 &&
memcmp(UTF8String, "\xEF\xBB\xBF", 3) == 0) {
UTF8String += 3;
UTF8StringLength -= 3;
}
switch (of_string_utf8_check(UTF8String, UTF8StringLength, &length)) {
case 1:
_s->isUTF8 = true;
break;
case -1:
@throw [OFInvalidEncodingException exception];
}
_s->hashed = false;
_s->cString = [self resizeMemory: _s->cString
size: _s->cStringLength +
UTF8StringLength + 1];
memcpy(_s->cString + _s->cStringLength, UTF8String, UTF8StringLength);
_s->cStringLength += UTF8StringLength;
_s->length += length;
_s->cString[_s->cStringLength] = 0;
}
- (void)appendCString: (const char *)cString
encoding: (of_string_encoding_t)encoding
{
[self appendCString: cString
encoding: encoding
length: strlen(cString)];
}
- (void)appendCString: (const char *)cString
encoding: (of_string_encoding_t)encoding
length: (size_t)cStringLength
{
if (encoding == OF_STRING_ENCODING_UTF_8)
[self appendUTF8String: cString
length: cStringLength];
else {
void *pool = objc_autoreleasePoolPush();
[self appendString:
[OFString stringWithCString: cString
encoding: encoding
length: cStringLength]];
objc_autoreleasePoolPop(pool);
}
}
- (void)appendString: (OFString *)string
{
size_t UTF8StringLength;
if (string == nil)
@throw [OFInvalidArgumentException exception];
UTF8StringLength = string.UTF8StringLength;
_s->hashed = false;
_s->cString = [self resizeMemory: _s->cString
size: _s->cStringLength +
UTF8StringLength + 1];
memcpy(_s->cString + _s->cStringLength, string.UTF8String,
UTF8StringLength);
_s->cStringLength += UTF8StringLength;
_s->length += string.length;
_s->cString[_s->cStringLength] = 0;
if ([string isKindOfClass: [OFUTF8String class]] ||
[string isKindOfClass: [OFMutableUTF8String class]]) {
if (((OFUTF8String *)string)->_s->isUTF8)
_s->isUTF8 = true;
} else
_s->isUTF8 = true;
}
- (void)appendCharacters: (const of_unichar_t *)characters
length: (size_t)length
{
char *tmp;
tmp = [self allocMemoryWithSize: (length * 4) + 1];
@try {
size_t j = 0;
bool isUTF8 = false;
for (size_t i = 0; i < length; i++) {
size_t len = of_string_utf8_encode(characters[i],
tmp + j);
if (len == 0)
@throw [OFInvalidEncodingException exception];
if (len > 1)
isUTF8 = true;
j += len;
}
tmp[j] = '\0';
_s->hashed = false;
_s->cString = [self resizeMemory: _s->cString
size: _s->cStringLength + j + 1];
memcpy(_s->cString + _s->cStringLength, tmp, j + 1);
_s->cStringLength += j;
_s->length += length;
if (isUTF8)
_s->isUTF8 = true;
} @finally {
[self freeMemory: tmp];
}
}
- (void)appendFormat: (OFConstantString *)format
arguments: (va_list)arguments
{
char *UTF8String;
int UTF8StringLength;
if (format == nil)
@throw [OFInvalidArgumentException exception];
if ((UTF8StringLength = of_vasprintf(&UTF8String, format.UTF8String,
arguments)) == -1)
@throw [OFInvalidFormatException exception];
@try {
[self appendUTF8String: UTF8String
length: UTF8StringLength];
} @finally {
free(UTF8String);
}
}
- (void)reverse
{
size_t i, j;
_s->hashed = false;
/* We reverse all bytes and restore UTF-8 later, if necessary */
for (i = 0, j = _s->cStringLength - 1; i < _s->cStringLength / 2;
i++, j--) {
_s->cString[i] ^= _s->cString[j];
_s->cString[j] ^= _s->cString[i];
_s->cString[i] ^= _s->cString[j];
}
if (!_s->isUTF8)
return;
for (i = 0; i < _s->cStringLength; i++) {
/* ASCII */
if OF_LIKELY (!(_s->cString[i] & 0x80))
continue;
/* A start byte can't happen first as we reversed everything */
if OF_UNLIKELY (_s->cString[i] & 0x40)
@throw [OFInvalidEncodingException exception];
/* Next byte must not be ASCII */
if OF_UNLIKELY (_s->cStringLength < i + 1 ||
!(_s->cString[i + 1] & 0x80))
@throw [OFInvalidEncodingException exception];
/* Next byte is the start byte */
if OF_LIKELY (_s->cString[i + 1] & 0x40) {
_s->cString[i] ^= _s->cString[i + 1];
_s->cString[i + 1] ^= _s->cString[i];
_s->cString[i] ^= _s->cString[i + 1];
i++;
continue;
}
/* Second next byte must not be ASCII */
if OF_UNLIKELY (_s->cStringLength < i + 2 ||
!(_s->cString[i + 2] & 0x80))
@throw [OFInvalidEncodingException exception];
/* Second next byte is the start byte */
if OF_LIKELY (_s->cString[i + 2] & 0x40) {
_s->cString[i] ^= _s->cString[i + 2];
_s->cString[i + 2] ^= _s->cString[i];
_s->cString[i] ^= _s->cString[i + 2];
i += 2;
continue;
}
/* Third next byte must not be ASCII */
if OF_UNLIKELY (_s->cStringLength < i + 3 ||
!(_s->cString[i + 3] & 0x80))
@throw [OFInvalidEncodingException exception];
/* Third next byte is the start byte */
if OF_LIKELY (_s->cString[i + 3] & 0x40) {
_s->cString[i] ^= _s->cString[i + 3];
_s->cString[i + 3] ^= _s->cString[i];
_s->cString[i] ^= _s->cString[i + 3];
_s->cString[i + 1] ^= _s->cString[i + 2];
_s->cString[i + 2] ^= _s->cString[i + 1];
_s->cString[i + 1] ^= _s->cString[i + 2];
i += 3;
continue;
}
/* UTF-8 does not allow more than 4 bytes per character */
@throw [OFInvalidEncodingException exception];
}
}
- (void)insertString: (OFString *)string
atIndex: (size_t)idx
{
size_t newCStringLength;
if (idx > _s->length)
@throw [OFOutOfRangeException exception];
if (_s->isUTF8)
idx = of_string_utf8_get_position(_s->cString, idx,
_s->cStringLength);
newCStringLength = _s->cStringLength + string.UTF8StringLength;
_s->hashed = false;
_s->cString = [self resizeMemory: _s->cString
size: newCStringLength + 1];
memmove(_s->cString + idx + string.UTF8StringLength,
_s->cString + idx, _s->cStringLength - idx);
memcpy(_s->cString + idx, string.UTF8String,
string.UTF8StringLength);
_s->cString[newCStringLength] = '\0';
_s->cStringLength = newCStringLength;
_s->length += string.length;
if ([string isKindOfClass: [OFUTF8String class]] ||
[string isKindOfClass: [OFMutableUTF8String class]]) {
if (((OFUTF8String *)string)->_s->isUTF8)
_s->isUTF8 = true;
} else
_s->isUTF8 = true;
}
- (void)deleteCharactersInRange: (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);
}
memmove(_s->cString + start, _s->cString + end,
_s->cStringLength - end);
_s->hashed = false;
_s->length -= range.length;
_s->cStringLength -= end - start;
_s->cString[_s->cStringLength] = 0;
@try {
_s->cString = [self resizeMemory: _s->cString
size: _s->cStringLength + 1];
} @catch (OFOutOfMemoryException *e) {
/* We don't really care, as we only made it smaller */
}
}
- (void)replaceCharactersInRange: (of_range_t)range
withString: (OFString *)replacement
{
size_t start = range.location;
size_t end = range.location + range.length;
size_t newCStringLength, newLength;
if (replacement == nil)
@throw [OFInvalidArgumentException exception];
if (range.length > SIZE_MAX - range.location || end > _s->length)
@throw [OFOutOfRangeException exception];
newLength = _s->length - range.length + replacement.length;
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);
}
newCStringLength = _s->cStringLength - (end - start) +
replacement.UTF8StringLength;
_s->hashed = false;
/*
* If the new string is bigger, we need to resize it first so we can
* memmove() the rest of the string to the end.
*
* We must not resize the string if the new string is smaller, because
* then we can't memmove() the rest of the string forward as the rest is
* lost due to the resize!
*/
if (newCStringLength > _s->cStringLength)
_s->cString = [self resizeMemory: _s->cString
size: newCStringLength + 1];
memmove(_s->cString + start + replacement.UTF8StringLength,
_s->cString + end, _s->cStringLength - end);
memcpy(_s->cString + start, replacement.UTF8String,
replacement.UTF8StringLength);
_s->cString[newCStringLength] = '\0';
/*
* If the new string is smaller, we can safely resize it now as we're
* done with memmove().
*/
if (newCStringLength < _s->cStringLength)
_s->cString = [self resizeMemory: _s->cString
size: newCStringLength + 1];
_s->cStringLength = newCStringLength;
_s->length = newLength;
if ([replacement isKindOfClass: [OFUTF8String class]] ||
[replacement isKindOfClass: [OFMutableUTF8String class]]) {
if (((OFUTF8String *)replacement)->_s->isUTF8)
_s->isUTF8 = true;
} else
_s->isUTF8 = true;
}
- (void)replaceOccurrencesOfString: (OFString *)string
withString: (OFString *)replacement
options: (int)options
range: (of_range_t)range
{
const char *searchString = string.UTF8String;
const char *replacementString = replacement.UTF8String;
size_t searchLength = string.UTF8StringLength;
size_t replacementLength = replacement.UTF8StringLength;
size_t last, newCStringLength, newLength;
char *newCString;
if (string == nil || replacement == nil)
@throw [OFInvalidArgumentException exception];
if (range.length > SIZE_MAX - range.location ||
range.location + range.length > self.length)
@throw [OFOutOfRangeException exception];
if (_s->isUTF8) {
range.location = of_string_utf8_get_position(_s->cString,
range.location, _s->cStringLength);
range.length = of_string_utf8_get_position(
_s->cString + range.location, range.length,
_s->cStringLength - range.location);
}
if (string.UTF8StringLength > range.length)
return;
newCString = NULL;
newCStringLength = 0;
newLength = _s->length;
last = 0;
for (size_t i = range.location; i <= range.length - searchLength; i++) {
if (memcmp(_s->cString + i, searchString, searchLength) != 0)
continue;
@try {
newCString = [self resizeMemory: newCString
size: newCStringLength +
i - last +
replacementLength + 1];
} @catch (id e) {
[self freeMemory: newCString];
@throw e;
}
memcpy(newCString + newCStringLength, _s->cString + last,
i - last);
memcpy(newCString + newCStringLength + i - last,
replacementString, replacementLength);
newCStringLength += i - last + replacementLength;
newLength = newLength - string.length + replacement.length;
i += searchLength - 1;
last = i + 1;
}
@try {
newCString = [self resizeMemory: newCString
size: newCStringLength +
_s->cStringLength - last + 1];
} @catch (id e) {
[self freeMemory: newCString];
@throw e;
}
memcpy(newCString + newCStringLength, _s->cString + last,
_s->cStringLength - last);
newCStringLength += _s->cStringLength - last;
newCString[newCStringLength] = 0;
[self freeMemory: _s->cString];
_s->hashed = false;
_s->cString = newCString;
_s->cStringLength = newCStringLength;
_s->length = newLength;
if ([replacement isKindOfClass: [OFUTF8String class]] ||
[replacement isKindOfClass: [OFMutableUTF8String class]]) {
if (((OFUTF8String *)replacement)->_s->isUTF8)
_s->isUTF8 = true;
} else
_s->isUTF8 = true;
}
- (void)deleteLeadingWhitespaces
{
size_t i;
for (i = 0; i < _s->cStringLength; i++)
if (!of_ascii_isspace(_s->cString[i]))
break;
_s->hashed = false;
_s->cStringLength -= i;
_s->length -= i;
memmove(_s->cString, _s->cString + i, _s->cStringLength);
_s->cString[_s->cStringLength] = '\0';
@try {
_s->cString = [self resizeMemory: _s->cString
size: _s->cStringLength + 1];
} @catch (OFOutOfMemoryException *e) {
/* We don't really care, as we only made it smaller */
}
}
- (void)deleteTrailingWhitespaces
{
size_t d;
char *p;
_s->hashed = false;
d = 0;
for (p = _s->cString + _s->cStringLength - 1; p >= _s->cString; p--) {
if (!of_ascii_isspace(*p))
break;
*p = '\0';
d++;
}
_s->cStringLength -= d;
_s->length -= d;
@try {
_s->cString = [self resizeMemory: _s->cString
size: _s->cStringLength + 1];
} @catch (OFOutOfMemoryException *e) {
/* We don't really care, as we only made it smaller */
}
}
- (void)deleteEnclosingWhitespaces
{
size_t d, i;
char *p;
_s->hashed = false;
d = 0;
for (p = _s->cString + _s->cStringLength - 1; p >= _s->cString; p--) {
if (!of_ascii_isspace(*p))
break;
*p = '\0';
d++;
}
_s->cStringLength -= d;
_s->length -= d;
for (i = 0; i < _s->cStringLength; i++)
if (!of_ascii_isspace(_s->cString[i]))
break;
_s->cStringLength -= i;
_s->length -= i;
memmove(_s->cString, _s->cString + i, _s->cStringLength);
_s->cString[_s->cStringLength] = '\0';
@try {
_s->cString = [self resizeMemory: _s->cString
size: _s->cStringLength + 1];
} @catch (OFOutOfMemoryException *e) {
/* We don't really care, as we only made it smaller */
}
}
- (void)makeImmutable
{
object_setClass(self, [OFUTF8String class]);
}
@end