/*
* Copyright (c) 2008, 2009, 2010, 2011
* Jonathan Schleifer <js@webkeks.org>
*
* 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#ifdef HAVE_MADVISE
# include <sys/mman.h>
#else
# define madvise(addr, len, advise)
#endif
#import "OFString.h"
#import "OFAutoreleasePool.h"
#import "OFInvalidArgumentException.h"
#import "OFInvalidEncodingException.h"
#import "OFInvalidFormatException.h"
#import "OFOutOfMemoryException.h"
#import "OFOutOfRangeException.h"
#import "macros.h"
#import "of_asprintf.h"
#import "unicode.h"
@implementation OFMutableString
- (void)_applyTable: (const of_unichar_t* const[])table
withSize: (size_t)tableSize
{
of_unichar_t c;
of_unichar_t *unicodeString;
size_t unicodeLen, newLength, cLen;
size_t i, j, d;
char *newString;
if (!isUTF8) {
assert(tableSize >= 1);
uint8_t *p = (uint8_t*)string + length;
uint8_t t;
while (--p >= (uint8_t*)string)
if ((t = table[0][*p]) != 0)
*p = t;
return;
}
unicodeLen = [self length];
unicodeString = [self allocMemoryForNItems: unicodeLen
withSize: sizeof(of_unichar_t)];
i = j = 0;
newLength = 0;
while (i < length) {
cLen = of_string_utf8_to_unicode(string + i, length - i, &c);
if (cLen == 0 || c > 0x10FFFF) {
[self freeMemory: unicodeString];
@throw [OFInvalidEncodingException newWithClass: isa];
}
if (c >> 8 < tableSize) {
of_unichar_t tc = table[c >> 8][c & 0xFF];
if (tc)
c = tc;
}
unicodeString[j++] = c;
if (c < 0x80)
newLength++;
else if (c < 0x800)
newLength += 2;
else if (c < 0x10000)
newLength += 3;
else if (c < 0x110000)
newLength += 4;
else {
[self freeMemory: unicodeString];
@throw [OFInvalidEncodingException newWithClass: isa];
}
i += cLen;
}
@try {
newString = [self allocMemoryWithSize: newLength + 1];
} @catch (id e) {
[self freeMemory: unicodeString];
@throw e;
}
j = 0;
for (i = 0; i < unicodeLen; i++) {
if ((d = of_string_unicode_to_utf8(unicodeString[i],
newString + j)) == 0) {
[self freeMemory: unicodeString];
[self freeMemory: newString];
@throw [OFInvalidEncodingException newWithClass: isa];
}
j += d;
}
assert(j == newLength);
newString[j] = 0;
[self freeMemory: unicodeString];
[self freeMemory: string];
string = newString;
length = newLength;
}
- (void)setToCString: (const char*)string_
{
size_t len;
[self freeMemory: string];
len = strlen(string_);
switch (of_string_check_utf8(string_, len)) {
case 0:
isUTF8 = NO;
break;
case 1:
isUTF8 = YES;
break;
case -1:
string = NULL;
length = 0;
isUTF8 = NO;
@throw [OFInvalidEncodingException newWithClass: isa];
}
length = len;
string = [self allocMemoryWithSize: length + 1];
memcpy(string, string_, length + 1);
}
- (void)appendCString: (const char*)string_
{
size_t len;
len = strlen(string_);
switch (of_string_check_utf8(string_, len)) {
case 1:
isUTF8 = YES;
break;
case -1:
@throw [OFInvalidEncodingException newWithClass: isa];
}
string = [self resizeMemory: string
toSize: length + len + 1];
memcpy(string + length, string_, len + 1);
length += len;
}
- (void)appendCString: (const char*)string_
withLength: (size_t)length_
{
switch (of_string_check_utf8(string_, length_)) {
case 1:
isUTF8 = YES;
break;
case -1:
@throw [OFInvalidEncodingException newWithClass: isa];
}
string = [self resizeMemory: string
toSize: length + length_ + 1];
memcpy(string + length, string_, length_);
length += length_;
string[length] = 0;
}
- (void)appendCString: (const char*)string_
withEncoding: (of_string_encoding_t)encoding
length: (size_t)length_
{
if (encoding == OF_STRING_ENCODING_UTF_8)
[self appendCString: string_
withLength: length_];
else {
OFAutoreleasePool *pool = [[OFAutoreleasePool alloc] init];
[self appendString: [OFString stringWithCString: string_
encoding: encoding
length: length_]];
[pool release];
}
}
- (void)appendCStringWithoutUTF8Checking: (const char*)string_
{
size_t len;
len = strlen(string_);
string = [self resizeMemory: string
toSize: length + len + 1];
memcpy(string + length, string_, len + 1);
length += len;
}
- (void)appendCStringWithoutUTF8Checking: (const char*)string_
length: (size_t)length_
{
string = [self resizeMemory: string
toSize: length + length_ + 1];
memcpy(string + length, string_, length_);
length += length_;
string[length] = 0;
}
- (void)appendCStringWithoutUTF8Checking: (const char*)string_
encoding: (of_string_encoding_t)encoding
length: (size_t)length_
{
if (encoding == OF_STRING_ENCODING_UTF_8)
[self appendCStringWithoutUTF8Checking: string_
length: length_];
else {
OFAutoreleasePool *pool = [[OFAutoreleasePool alloc] init];
[self appendString: [OFString stringWithCString: string_
encoding: encoding
length: length_]];
[pool release];
}
}
- (void)appendString: (OFString*)string_
{
if (string_ == nil)
@throw [OFInvalidArgumentException newWithClass: isa
selector: _cmd];
[self appendCString: [string_ cString]];
}
- (void)appendFormat: (OFString*)format, ...
{
va_list arguments;
va_start(arguments, format);
[self appendFormat: format
withArguments: arguments];
va_end(arguments);
}
- (void)appendFormat: (OFString*)format
withArguments: (va_list)arguments
{
char *t;
int len;
if (format == nil)
@throw [OFInvalidArgumentException newWithClass: isa
selector: _cmd];
if ((len = of_vasprintf(&t, [format cString], arguments)) == -1)
@throw [OFInvalidFormatException newWithClass: isa];
@try {
[self appendCString: t
withLength: len];
} @finally {
free(t);
}
}
- (void)prependString: (OFString*)string_
{
return [self insertString: string_
atIndex: 0];
}
- (void)reverse
{
size_t i, j, len = length / 2;
madvise(string, length, MADV_SEQUENTIAL);
/* We reverse all bytes and restore UTF-8 later, if necessary */
for (i = 0, j = length - 1; i < len; i++, j--) {
string[i] ^= string[j];
string[j] ^= string[i];
string[i] ^= string[j];
}
if (!isUTF8) {
madvise(string, length, MADV_NORMAL);
return;
}
for (i = 0; i < length; i++) {
/* ASCII */
if (OF_LIKELY(!(string[i] & 0x80)))
continue;
/* A start byte can't happen first as we reversed everything */
if (OF_UNLIKELY(string[i] & 0x40)) {
madvise(string, length, MADV_NORMAL);
@throw [OFInvalidEncodingException newWithClass: isa];
}
/* Next byte must not be ASCII */
if (OF_UNLIKELY(length < i + 1 || !(string[i + 1] & 0x80))) {
madvise(string, length, MADV_NORMAL);
@throw [OFInvalidEncodingException newWithClass: isa];
}
/* Next byte is the start byte */
if (OF_LIKELY(string[i + 1] & 0x40)) {
string[i] ^= string[i + 1];
string[i + 1] ^= string[i];
string[i] ^= string[i + 1];
i++;
continue;
}
/* Second next byte must not be ASCII */
if (OF_UNLIKELY(length < i + 2 || !(string[i + 2] & 0x80))) {
madvise(string, length, MADV_NORMAL);
@throw [OFInvalidEncodingException newWithClass: isa];
}
/* Second next byte is the start byte */
if (OF_LIKELY(string[i + 2] & 0x40)) {
string[i] ^= string[i + 2];
string[i + 2] ^= string[i];
string[i] ^= string[i + 2];
i += 2;
continue;
}
/* Third next byte must not be ASCII */
if (OF_UNLIKELY(length < i + 3 || !(string[i + 3] & 0x80))) {
madvise(string, length, MADV_NORMAL);
@throw [OFInvalidEncodingException newWithClass: isa];
}
/* Third next byte is the start byte */
if (OF_LIKELY(string[i + 3] & 0x40)) {
string[i] ^= string[i + 3];
string[i + 3] ^= string[i];
string[i] ^= string[i + 3];
string[i + 1] ^= string[i + 2];
string[i + 2] ^= string[i + 1];
string[i + 1] ^= string[i + 2];
i += 3;
continue;
}
/* UTF-8 does not allow more than 4 bytes per character */
madvise(string, length, MADV_NORMAL);
@throw [OFInvalidEncodingException newWithClass: isa];
}
madvise(string, length, MADV_NORMAL);
}
- (void)upper
{
[self _applyTable: of_unicode_upper_table
withSize: OF_UNICODE_UPPER_TABLE_SIZE];
}
- (void)lower
{
[self _applyTable: of_unicode_lower_table
withSize: OF_UNICODE_LOWER_TABLE_SIZE];
}
- (void)insertString: (OFString*)string_
atIndex: (size_t)index
{
size_t newLength;
if (isUTF8)
index = of_string_index_to_position(string, index, length);
if (index > length)
@throw [OFOutOfRangeException newWithClass: isa];
newLength = length + [string_ cStringLength];
string = [self resizeMemory: string
toSize: newLength + 1];
memmove(string + index + [string_ cStringLength], string + index,
length - index);
memcpy(string + index, [string_ cString], [string_ cStringLength]);
string[newLength] = '\0';
length = newLength;
}
- (void)deleteCharactersFromIndex: (size_t)start
toIndex: (size_t)end
{
if (isUTF8) {
start = of_string_index_to_position(string, start, length);
end = of_string_index_to_position(string, end, length);
}
if (start > end)
@throw [OFInvalidArgumentException newWithClass: isa
selector: _cmd];
if (end > length)
@throw [OFOutOfRangeException newWithClass: isa];
memmove(string + start, string + end, length - end);
length -= end - start;
string[length] = 0;
@try {
string = [self resizeMemory: string
toSize: length + 1];
} @catch (OFOutOfMemoryException *e) {
/* We don't really care, as we only made it smaller */
[e release];
}
}
- (void)deleteCharactersInRange: (of_range_t)range
{
[self deleteCharactersFromIndex: range.start
toIndex: range.start + range.length];
}
- (void)replaceCharactersFromIndex: (size_t)start
toIndex: (size_t)end
withString: (OFString*)replacement
{
size_t newLength;
if (isUTF8) {
start = of_string_index_to_position(string, start, length);
end = of_string_index_to_position(string, end, length);
}
if (start > end)
@throw [OFInvalidArgumentException newWithClass: isa
selector: _cmd];
if (end > length)
@throw [OFOutOfRangeException newWithClass: isa];
newLength = length - (end - start) + [replacement cStringLength];
string = [self resizeMemory: string
toSize: newLength + 1];
memmove(string + end, string + start + [replacement cStringLength],
length - end);
memcpy(string + start, [replacement cString],
[replacement cStringLength]);
string[newLength] = '\0';
length = newLength;
}
- (void)replaceCharactersInRange: (of_range_t)range
withString: (OFString*)replacement
{
[self replaceCharactersFromIndex: range.start
toIndex: range.start + range.length
withString: replacement];
}
- (void)replaceOccurrencesOfString: (OFString*)string_
withString: (OFString*)replacement
{
const char *cString = [string_ cString];
const char *replacementCString = [replacement cString];
size_t stringLen = [string_ cStringLength];
size_t replacementLen = [replacement cStringLength];
size_t i, last, newLength;
char *newString;
if (stringLen > length)
return;
newString = NULL;
newLength = 0;
for (i = 0, last = 0; i <= length - stringLen; i++) {
if (memcmp(string + i, cString, stringLen))
continue;
@try {
newString = [self resizeMemory: newString
toSize: newLength + i - last +
replacementLen + 1];
} @catch (id e) {
[self freeMemory: newString];
@throw e;
}
memcpy(newString + newLength, string + last, i - last);
memcpy(newString + newLength + i - last, replacementCString,
replacementLen);
newLength += i - last + replacementLen;
i += stringLen - 1;
last = i + 1;
}
@try {
newString = [self resizeMemory: newString
toSize: newLength + length - last + 1];
} @catch (id e) {
[self freeMemory: newString];
@throw e;
}
memcpy(newString + newLength, string + last, length - last);
newLength += length - last;
newString[newLength] = 0;
[self freeMemory: string];
string = newString;
length = newLength;
}
- (void)deleteLeadingWhitespaces
{
size_t i;
for (i = 0; i < length; i++)
if (string[i] != ' ' && string[i] != '\t' &&
string[i] != '\n' && string[i] != '\r')
break;
length -= i;
memmove(string, string + i, length);
string[length] = '\0';
@try {
string = [self resizeMemory: string
toSize: length + 1];
} @catch (OFOutOfMemoryException *e) {
/* We don't really care, as we only made it smaller */
[e release];
}
}
- (void)deleteTrailingWhitespaces
{
size_t d;
char *p;
d = 0;
for (p = string + length - 1; p >= string; p--) {
if (*p != ' ' && *p != '\t' && *p != '\n' && *p != '\r')
break;
*p = '\0';
d++;
}
length -= d;
@try {
string = [self resizeMemory: string
toSize: length + 1];
} @catch (OFOutOfMemoryException *e) {
/* We don't really care, as we only made it smaller */
[e release];
}
}
- (void)deleteLeadingAndTrailingWhitespaces
{
size_t d, i;
char *p;
d = 0;
for (p = string + length - 1; p >= string; p--) {
if (*p != ' ' && *p != '\t' && *p != '\n' && *p != '\r')
break;
*p = '\0';
d++;
}
length -= d;
for (i = 0; i < length; i++)
if (string[i] != ' ' && string[i] != '\t' &&
string[i] != '\n' && string[i] != '\r')
break;
length -= i;
memmove(string, string + i, length);
string[length] = '\0';
@try {
string = [self resizeMemory: string
toSize: length + 1];
} @catch (OFOutOfMemoryException *e) {
/* We don't really care, as we only made it smaller */
[e release];
}
}
- copy
{
return [[OFString alloc] initWithString: self];
}
@end