679 lines
15 KiB
C++
679 lines
15 KiB
C++
/*
|
|
* Copyright (C) 2005 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#define __STDC_LIMIT_MACROS
|
|
#include <stdint.h>
|
|
|
|
#include <utils/String8.h>
|
|
|
|
#include <utils/Log.h>
|
|
#include <utils/Unicode.h>
|
|
#include <utils/SharedBuffer.h>
|
|
#include <utils/String16.h>
|
|
#include <utils/threads.h>
|
|
|
|
#include <ctype.h>
|
|
|
|
/*
|
|
* Functions outside android is below the namespace android, since they use
|
|
* functions and constants in android namespace.
|
|
*/
|
|
|
|
// ---------------------------------------------------------------------------
|
|
|
|
namespace android {
|
|
|
|
// Separator used by resource paths. This is not platform dependent contrary
|
|
// to OS_PATH_SEPARATOR.
|
|
#define RES_PATH_SEPARATOR '/'
|
|
|
|
static SharedBuffer* gEmptyStringBuf = NULL;
|
|
static char* gEmptyString = NULL;
|
|
|
|
extern int gDarwinCantLoadAllObjects;
|
|
int gDarwinIsReallyAnnoying;
|
|
|
|
void initialize_string8();
|
|
|
|
static inline char* getEmptyString()
|
|
{
|
|
gEmptyStringBuf->acquire();
|
|
return gEmptyString;
|
|
}
|
|
|
|
void initialize_string8()
|
|
{
|
|
// HACK: This dummy dependency forces linking libutils Static.cpp,
|
|
// which is needed to initialize String8/String16 classes.
|
|
// These variables are named for Darwin, but are needed elsewhere too,
|
|
// including static linking on any platform.
|
|
gDarwinIsReallyAnnoying = gDarwinCantLoadAllObjects;
|
|
|
|
SharedBuffer* buf = SharedBuffer::alloc(1);
|
|
char* str = (char*)buf->data();
|
|
*str = 0;
|
|
gEmptyStringBuf = buf;
|
|
gEmptyString = str;
|
|
}
|
|
|
|
void terminate_string8()
|
|
{
|
|
SharedBuffer::bufferFromData(gEmptyString)->release();
|
|
gEmptyStringBuf = NULL;
|
|
gEmptyString = NULL;
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------
|
|
|
|
static char* allocFromUTF8(const char* in, size_t len)
|
|
{
|
|
if (len > 0) {
|
|
if (len == SIZE_MAX) {
|
|
return NULL;
|
|
}
|
|
SharedBuffer* buf = SharedBuffer::alloc(len+1);
|
|
ALOG_ASSERT(buf, "Unable to allocate shared buffer");
|
|
if (buf) {
|
|
char* str = (char*)buf->data();
|
|
memcpy(str, in, len);
|
|
str[len] = 0;
|
|
return str;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
return getEmptyString();
|
|
}
|
|
|
|
static char* allocFromUTF16(const char16_t* in, size_t len)
|
|
{
|
|
if (len == 0) return getEmptyString();
|
|
|
|
const ssize_t bytes = utf16_to_utf8_length(in, len);
|
|
if (bytes < 0) {
|
|
return getEmptyString();
|
|
}
|
|
|
|
SharedBuffer* buf = SharedBuffer::alloc(bytes+1);
|
|
ALOG_ASSERT(buf, "Unable to allocate shared buffer");
|
|
if (!buf) {
|
|
return getEmptyString();
|
|
}
|
|
|
|
char* str = (char*)buf->data();
|
|
utf16_to_utf8(in, len, str);
|
|
return str;
|
|
}
|
|
|
|
static char* allocFromUTF32(const char32_t* in, size_t len)
|
|
{
|
|
if (len == 0) {
|
|
return getEmptyString();
|
|
}
|
|
|
|
const ssize_t bytes = utf32_to_utf8_length(in, len);
|
|
if (bytes < 0) {
|
|
return getEmptyString();
|
|
}
|
|
|
|
SharedBuffer* buf = SharedBuffer::alloc(bytes+1);
|
|
ALOG_ASSERT(buf, "Unable to allocate shared buffer");
|
|
if (!buf) {
|
|
return getEmptyString();
|
|
}
|
|
|
|
char* str = (char*) buf->data();
|
|
utf32_to_utf8(in, len, str);
|
|
|
|
return str;
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------
|
|
|
|
String8::String8()
|
|
: mString(getEmptyString())
|
|
{
|
|
}
|
|
|
|
String8::String8(StaticLinkage)
|
|
: mString(0)
|
|
{
|
|
// this constructor is used when we can't rely on the static-initializers
|
|
// having run. In this case we always allocate an empty string. It's less
|
|
// efficient than using getEmptyString(), but we assume it's uncommon.
|
|
|
|
char* data = static_cast<char*>(
|
|
SharedBuffer::alloc(sizeof(char))->data());
|
|
data[0] = 0;
|
|
mString = data;
|
|
}
|
|
|
|
String8::String8(const String8& o)
|
|
: mString(o.mString)
|
|
{
|
|
SharedBuffer::bufferFromData(mString)->acquire();
|
|
}
|
|
|
|
String8::String8(const char* o)
|
|
: mString(allocFromUTF8(o, strlen(o)))
|
|
{
|
|
if (mString == NULL) {
|
|
mString = getEmptyString();
|
|
}
|
|
}
|
|
|
|
String8::String8(const char* o, size_t len)
|
|
: mString(allocFromUTF8(o, len))
|
|
{
|
|
if (mString == NULL) {
|
|
mString = getEmptyString();
|
|
}
|
|
}
|
|
|
|
String8::String8(const String16& o)
|
|
: mString(allocFromUTF16(o.string(), o.size()))
|
|
{
|
|
}
|
|
|
|
String8::String8(const char16_t* o)
|
|
: mString(allocFromUTF16(o, strlen16(o)))
|
|
{
|
|
}
|
|
|
|
String8::String8(const char16_t* o, size_t len)
|
|
: mString(allocFromUTF16(o, len))
|
|
{
|
|
}
|
|
|
|
String8::String8(const char32_t* o)
|
|
: mString(allocFromUTF32(o, strlen32(o)))
|
|
{
|
|
}
|
|
|
|
String8::String8(const char32_t* o, size_t len)
|
|
: mString(allocFromUTF32(o, len))
|
|
{
|
|
}
|
|
|
|
String8::~String8()
|
|
{
|
|
SharedBuffer::bufferFromData(mString)->release();
|
|
}
|
|
|
|
String8 String8::format(const char* fmt, ...)
|
|
{
|
|
va_list args;
|
|
va_start(args, fmt);
|
|
|
|
String8 result(formatV(fmt, args));
|
|
|
|
va_end(args);
|
|
return result;
|
|
}
|
|
|
|
String8 String8::formatV(const char* fmt, va_list args)
|
|
{
|
|
String8 result;
|
|
result.appendFormatV(fmt, args);
|
|
return result;
|
|
}
|
|
|
|
void String8::clear() {
|
|
SharedBuffer::bufferFromData(mString)->release();
|
|
mString = getEmptyString();
|
|
}
|
|
|
|
void String8::setTo(const String8& other)
|
|
{
|
|
SharedBuffer::bufferFromData(other.mString)->acquire();
|
|
SharedBuffer::bufferFromData(mString)->release();
|
|
mString = other.mString;
|
|
}
|
|
|
|
status_t String8::setTo(const char* other)
|
|
{
|
|
const char *newString = allocFromUTF8(other, strlen(other));
|
|
SharedBuffer::bufferFromData(mString)->release();
|
|
mString = newString;
|
|
if (mString) return NO_ERROR;
|
|
|
|
mString = getEmptyString();
|
|
return NO_MEMORY;
|
|
}
|
|
|
|
status_t String8::setTo(const char* other, size_t len)
|
|
{
|
|
const char *newString = allocFromUTF8(other, len);
|
|
SharedBuffer::bufferFromData(mString)->release();
|
|
mString = newString;
|
|
if (mString) return NO_ERROR;
|
|
|
|
mString = getEmptyString();
|
|
return NO_MEMORY;
|
|
}
|
|
|
|
status_t String8::setTo(const char16_t* other, size_t len)
|
|
{
|
|
const char *newString = allocFromUTF16(other, len);
|
|
SharedBuffer::bufferFromData(mString)->release();
|
|
mString = newString;
|
|
if (mString) return NO_ERROR;
|
|
|
|
mString = getEmptyString();
|
|
return NO_MEMORY;
|
|
}
|
|
|
|
status_t String8::setTo(const char32_t* other, size_t len)
|
|
{
|
|
const char *newString = allocFromUTF32(other, len);
|
|
SharedBuffer::bufferFromData(mString)->release();
|
|
mString = newString;
|
|
if (mString) return NO_ERROR;
|
|
|
|
mString = getEmptyString();
|
|
return NO_MEMORY;
|
|
}
|
|
|
|
status_t String8::append(const String8& other)
|
|
{
|
|
const size_t otherLen = other.bytes();
|
|
if (bytes() == 0) {
|
|
setTo(other);
|
|
return NO_ERROR;
|
|
} else if (otherLen == 0) {
|
|
return NO_ERROR;
|
|
}
|
|
|
|
return real_append(other.string(), otherLen);
|
|
}
|
|
|
|
status_t String8::append(const char* other)
|
|
{
|
|
return append(other, strlen(other));
|
|
}
|
|
|
|
status_t String8::append(const char* other, size_t otherLen)
|
|
{
|
|
if (bytes() == 0) {
|
|
return setTo(other, otherLen);
|
|
} else if (otherLen == 0) {
|
|
return NO_ERROR;
|
|
}
|
|
|
|
return real_append(other, otherLen);
|
|
}
|
|
|
|
status_t String8::appendFormat(const char* fmt, ...)
|
|
{
|
|
va_list args;
|
|
va_start(args, fmt);
|
|
|
|
status_t result = appendFormatV(fmt, args);
|
|
|
|
va_end(args);
|
|
return result;
|
|
}
|
|
|
|
status_t String8::appendFormatV(const char* fmt, va_list args)
|
|
{
|
|
int n, result = NO_ERROR;
|
|
va_list tmp_args;
|
|
|
|
/* args is undefined after vsnprintf.
|
|
* So we need a copy here to avoid the
|
|
* second vsnprintf access undefined args.
|
|
*/
|
|
va_copy(tmp_args, args);
|
|
n = vsnprintf(NULL, 0, fmt, tmp_args);
|
|
va_end(tmp_args);
|
|
|
|
if (n != 0) {
|
|
size_t oldLength = length();
|
|
char* buf = lockBuffer(oldLength + n);
|
|
if (buf) {
|
|
vsnprintf(buf + oldLength, n + 1, fmt, args);
|
|
} else {
|
|
result = NO_MEMORY;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
status_t String8::real_append(const char* other, size_t otherLen)
|
|
{
|
|
const size_t myLen = bytes();
|
|
|
|
SharedBuffer* buf = SharedBuffer::bufferFromData(mString)
|
|
->editResize(myLen+otherLen+1);
|
|
if (buf) {
|
|
char* str = (char*)buf->data();
|
|
mString = str;
|
|
str += myLen;
|
|
memcpy(str, other, otherLen);
|
|
str[otherLen] = '\0';
|
|
return NO_ERROR;
|
|
}
|
|
return NO_MEMORY;
|
|
}
|
|
|
|
char* String8::lockBuffer(size_t size)
|
|
{
|
|
SharedBuffer* buf = SharedBuffer::bufferFromData(mString)
|
|
->editResize(size+1);
|
|
if (buf) {
|
|
char* str = (char*)buf->data();
|
|
mString = str;
|
|
return str;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
void String8::unlockBuffer()
|
|
{
|
|
unlockBuffer(strlen(mString));
|
|
}
|
|
|
|
status_t String8::unlockBuffer(size_t size)
|
|
{
|
|
if (size != this->size()) {
|
|
SharedBuffer* buf = SharedBuffer::bufferFromData(mString)
|
|
->editResize(size+1);
|
|
if (! buf) {
|
|
return NO_MEMORY;
|
|
}
|
|
|
|
char* str = (char*)buf->data();
|
|
str[size] = 0;
|
|
mString = str;
|
|
}
|
|
|
|
return NO_ERROR;
|
|
}
|
|
|
|
ssize_t String8::find(const char* other, size_t start) const
|
|
{
|
|
size_t len = size();
|
|
if (start >= len) {
|
|
return -1;
|
|
}
|
|
const char* s = mString+start;
|
|
const char* p = strstr(s, other);
|
|
return p ? p-mString : -1;
|
|
}
|
|
|
|
bool String8::removeAll(const char* other) {
|
|
ssize_t index = find(other);
|
|
if (index < 0) return false;
|
|
|
|
char* buf = lockBuffer(size());
|
|
if (!buf) return false; // out of memory
|
|
|
|
size_t skip = strlen(other);
|
|
size_t len = size();
|
|
size_t tail = index;
|
|
while (size_t(index) < len) {
|
|
ssize_t next = find(other, index + skip);
|
|
if (next < 0) {
|
|
next = len;
|
|
}
|
|
|
|
memmove(buf + tail, buf + index + skip, next - index - skip);
|
|
tail += next - index - skip;
|
|
index = next;
|
|
}
|
|
unlockBuffer(tail);
|
|
return true;
|
|
}
|
|
|
|
void String8::toLower()
|
|
{
|
|
toLower(0, size());
|
|
}
|
|
|
|
void String8::toLower(size_t start, size_t length)
|
|
{
|
|
const size_t len = size();
|
|
if (start >= len) {
|
|
return;
|
|
}
|
|
if (start+length > len) {
|
|
length = len-start;
|
|
}
|
|
char* buf = lockBuffer(len);
|
|
buf += start;
|
|
while (length > 0) {
|
|
*buf = tolower(*buf);
|
|
buf++;
|
|
length--;
|
|
}
|
|
unlockBuffer(len);
|
|
}
|
|
|
|
void String8::toUpper()
|
|
{
|
|
toUpper(0, size());
|
|
}
|
|
|
|
void String8::toUpper(size_t start, size_t length)
|
|
{
|
|
const size_t len = size();
|
|
if (start >= len) {
|
|
return;
|
|
}
|
|
if (start+length > len) {
|
|
length = len-start;
|
|
}
|
|
char* buf = lockBuffer(len);
|
|
buf += start;
|
|
while (length > 0) {
|
|
*buf = toupper(*buf);
|
|
buf++;
|
|
length--;
|
|
}
|
|
unlockBuffer(len);
|
|
}
|
|
|
|
size_t String8::getUtf32Length() const
|
|
{
|
|
return utf8_to_utf32_length(mString, length());
|
|
}
|
|
|
|
int32_t String8::getUtf32At(size_t index, size_t *next_index) const
|
|
{
|
|
return utf32_from_utf8_at(mString, length(), index, next_index);
|
|
}
|
|
|
|
void String8::getUtf32(char32_t* dst) const
|
|
{
|
|
utf8_to_utf32(mString, length(), dst);
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Path functions
|
|
|
|
void String8::setPathName(const char* name)
|
|
{
|
|
setPathName(name, strlen(name));
|
|
}
|
|
|
|
void String8::setPathName(const char* name, size_t len)
|
|
{
|
|
char* buf = lockBuffer(len);
|
|
|
|
memcpy(buf, name, len);
|
|
|
|
// remove trailing path separator, if present
|
|
if (len > 0 && buf[len-1] == OS_PATH_SEPARATOR)
|
|
len--;
|
|
|
|
buf[len] = '\0';
|
|
|
|
unlockBuffer(len);
|
|
}
|
|
|
|
String8 String8::getPathLeaf(void) const
|
|
{
|
|
const char* cp;
|
|
const char*const buf = mString;
|
|
|
|
cp = strrchr(buf, OS_PATH_SEPARATOR);
|
|
if (cp == NULL)
|
|
return String8(*this);
|
|
else
|
|
return String8(cp+1);
|
|
}
|
|
|
|
String8 String8::getPathDir(void) const
|
|
{
|
|
const char* cp;
|
|
const char*const str = mString;
|
|
|
|
cp = strrchr(str, OS_PATH_SEPARATOR);
|
|
if (cp == NULL)
|
|
return String8("");
|
|
else
|
|
return String8(str, cp - str);
|
|
}
|
|
|
|
String8 String8::walkPath(String8* outRemains) const
|
|
{
|
|
const char* cp;
|
|
const char*const str = mString;
|
|
const char* buf = str;
|
|
|
|
cp = strchr(buf, OS_PATH_SEPARATOR);
|
|
if (cp == buf) {
|
|
// don't include a leading '/'.
|
|
buf = buf+1;
|
|
cp = strchr(buf, OS_PATH_SEPARATOR);
|
|
}
|
|
|
|
if (cp == NULL) {
|
|
String8 res = buf != str ? String8(buf) : *this;
|
|
if (outRemains) *outRemains = String8("");
|
|
return res;
|
|
}
|
|
|
|
String8 res(buf, cp-buf);
|
|
if (outRemains) *outRemains = String8(cp+1);
|
|
return res;
|
|
}
|
|
|
|
/*
|
|
* Helper function for finding the start of an extension in a pathname.
|
|
*
|
|
* Returns a pointer inside mString, or NULL if no extension was found.
|
|
*/
|
|
char* String8::find_extension(void) const
|
|
{
|
|
const char* lastSlash;
|
|
const char* lastDot;
|
|
const char* const str = mString;
|
|
|
|
// only look at the filename
|
|
lastSlash = strrchr(str, OS_PATH_SEPARATOR);
|
|
if (lastSlash == NULL)
|
|
lastSlash = str;
|
|
else
|
|
lastSlash++;
|
|
|
|
// find the last dot
|
|
lastDot = strrchr(lastSlash, '.');
|
|
if (lastDot == NULL)
|
|
return NULL;
|
|
|
|
// looks good, ship it
|
|
return const_cast<char*>(lastDot);
|
|
}
|
|
|
|
String8 String8::getPathExtension(void) const
|
|
{
|
|
char* ext;
|
|
|
|
ext = find_extension();
|
|
if (ext != NULL)
|
|
return String8(ext);
|
|
else
|
|
return String8("");
|
|
}
|
|
|
|
String8 String8::getBasePath(void) const
|
|
{
|
|
char* ext;
|
|
const char* const str = mString;
|
|
|
|
ext = find_extension();
|
|
if (ext == NULL)
|
|
return String8(*this);
|
|
else
|
|
return String8(str, ext - str);
|
|
}
|
|
|
|
String8& String8::appendPath(const char* name)
|
|
{
|
|
// TODO: The test below will fail for Win32 paths. Fix later or ignore.
|
|
if (name[0] != OS_PATH_SEPARATOR) {
|
|
if (*name == '\0') {
|
|
// nothing to do
|
|
return *this;
|
|
}
|
|
|
|
size_t len = length();
|
|
if (len == 0) {
|
|
// no existing filename, just use the new one
|
|
setPathName(name);
|
|
return *this;
|
|
}
|
|
|
|
// make room for oldPath + '/' + newPath
|
|
int newlen = strlen(name);
|
|
|
|
char* buf = lockBuffer(len+1+newlen);
|
|
|
|
// insert a '/' if needed
|
|
if (buf[len-1] != OS_PATH_SEPARATOR)
|
|
buf[len++] = OS_PATH_SEPARATOR;
|
|
|
|
memcpy(buf+len, name, newlen+1);
|
|
len += newlen;
|
|
|
|
unlockBuffer(len);
|
|
|
|
return *this;
|
|
} else {
|
|
setPathName(name);
|
|
return *this;
|
|
}
|
|
}
|
|
|
|
String8& String8::convertToResPath()
|
|
{
|
|
#if OS_PATH_SEPARATOR != RES_PATH_SEPARATOR
|
|
size_t len = length();
|
|
if (len > 0) {
|
|
char * buf = lockBuffer(len);
|
|
for (char * end = buf + len; buf < end; ++buf) {
|
|
if (*buf == OS_PATH_SEPARATOR)
|
|
*buf = RES_PATH_SEPARATOR;
|
|
}
|
|
unlockBuffer(len);
|
|
}
|
|
#endif
|
|
return *this;
|
|
}
|
|
|
|
}; // namespace android
|