/*
* Copyright (c) 2008 - 2009
* Jonathan Schleifer <js@webkeks.org>
*
* All rights reserved.
*
* This file is part of libobjfw. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE included in
* the packaging of this file.
*/
#include "config.h"
#define _GNU_SOURCE
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#ifdef HAVE_MADVISE
#include <sys/mman.h>
#else
#define madvise(addr, len, advise)
#endif
#import "OFMutableString.h"
#import "OFExceptions.h"
#import "OFMacros.h"
#ifndef HAVE_ASPRINTF
#import "asprintf.h"
#endif
@implementation OFMutableString
- (id)copy
{
return [[OFString alloc] initWithString: self];
}
- setToCString: (const char*)str
{
size_t len;
if (string != NULL)
[self freeMemory: string];
len = strlen(str);
switch (of_string_check_utf8(str, len)) {
case 1:
is_utf8 = YES;
break;
case -1:
string = NULL;
length = 0;
is_utf8 = NO;
@throw [OFInvalidEncodingException newWithClass: isa];
}
length = len;
string = [self allocMemoryWithSize: length + 1];
memcpy(string, str, length + 1);
return self;
}
- append: (OFString*)str
{
return [self appendCString: [str cString]];
}
- appendCString: (const char*)str
{
size_t strlength;
strlength = strlen(str);
switch (of_string_check_utf8(str, strlength)) {
case 1:
is_utf8 = YES;
break;
case -1:
@throw [OFInvalidEncodingException newWithClass: isa];
}
string = [self resizeMemory: string
toSize: length + strlength + 1];
memcpy(string + length, str, strlength + 1);
length += strlength;
return self;
}
- appendWithFormat: (OFString*)fmt, ...
{
id ret;
va_list args;
va_start(args, fmt);
ret = [self appendWithFormat: fmt
andArguments: args];
va_end(args);
return ret;
}
- appendWithFormat: (OFString*)fmt
andArguments: (va_list)args
{
char *t;
if (fmt == NULL)
@throw [OFInvalidFormatException newWithClass: isa];
if ((vasprintf(&t, [fmt cString], args)) == -1)
/*
* This is only the most likely error to happen.
* Unfortunately, as errno isn't always thread-safe, there's
* no good way for us to find out what really happened.
*/
@throw [OFOutOfMemoryException newWithClass: isa];
@try {
[self appendCString: t];
} @finally {
free(t);
}
return self;
}
- reverse
{
size_t i, j, len = length / 2;
madvise(string, len, 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 (!is_utf8) {
madvise(string, len, MADV_NORMAL);
return self;
}
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, len, MADV_NORMAL);
@throw [OFInvalidEncodingException newWithClass: isa];
}
/* Next byte must not be ASCII */
if (OF_UNLIKELY(length < i + 1 || !(string[i + 1] & 0x80))) {
madvise(string, len, 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, len, 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, len, 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, len, MADV_NORMAL);
@throw [OFInvalidEncodingException newWithClass: isa];
}
madvise(string, len, MADV_NORMAL);
return self;
}
- upper
{
char *p = string + length;
if (is_utf8)
@throw [OFInvalidEncodingException newWithClass: isa];
while (--p >= string)
*p = toupper((int)*p);
return self;
}
- lower
{
char *p = string + length;
if (is_utf8)
@throw [OFInvalidEncodingException newWithClass: isa];
while (--p >= string)
*p = tolower((int)*p);
return self;
}
- replaceOccurrencesOfString: (OFString*)str
withString: (OFString*)repl
{
const char *str_c = [str cString];
const char *repl_c = [repl cString];
size_t str_len = [str length];
size_t repl_len = [repl length];
size_t i, last, tmp_len;
char *tmp;
if (str_len > length)
return self;
tmp = NULL;
tmp_len = 0;
for (i = 0, last = 0; i <= length - str_len; i++) {
if (memcmp(string + i, str_c, str_len))
continue;
@try {
tmp = [self resizeMemory: tmp
toSize: tmp_len + i - last +
repl_len + 1];
} @catch (OFException *e) {
[self freeMemory: tmp];
@throw e;
}
memcpy(tmp + tmp_len, string + last, i - last);
memcpy(tmp + tmp_len + i - last, repl_c, repl_len);
tmp_len += i - last + repl_len;
i += str_len - 1;
last = i + 1;
}
@try {
tmp = [self resizeMemory: tmp
toSize: tmp_len + length - last + 1];
} @catch (OFException *e) {
[self freeMemory: tmp];
@throw e;
}
memcpy(tmp + tmp_len, string + last, length - last);
tmp_len += length - last;
tmp[tmp_len] = 0;
[self freeMemory: string];
string = tmp;
length = tmp_len;
return self;
}
@end