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431 lines
11 KiB
431 lines
11 KiB
/* |
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* Copyright (C) 2005 The Android Open Source Project |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#include <utils/String16.h> |
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#include <utils/Log.h> |
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#include <ctype.h> |
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#include "SharedBuffer.h" |
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namespace android { |
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static SharedBuffer* gEmptyStringBuf = NULL; |
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static char16_t* gEmptyString = NULL; |
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static inline char16_t* getEmptyString() |
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{ |
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gEmptyStringBuf->acquire(); |
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return gEmptyString; |
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} |
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void initialize_string16() |
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{ |
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SharedBuffer* buf = SharedBuffer::alloc(sizeof(char16_t)); |
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char16_t* str = (char16_t*)buf->data(); |
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*str = 0; |
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gEmptyStringBuf = buf; |
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gEmptyString = str; |
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} |
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void terminate_string16() |
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{ |
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SharedBuffer::bufferFromData(gEmptyString)->release(); |
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gEmptyStringBuf = NULL; |
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gEmptyString = NULL; |
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} |
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// --------------------------------------------------------------------------- |
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static char16_t* allocFromUTF8(const char* u8str, size_t u8len) |
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{ |
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if (u8len == 0) return getEmptyString(); |
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const uint8_t* u8cur = (const uint8_t*) u8str; |
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const ssize_t u16len = utf8_to_utf16_length(u8cur, u8len); |
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if (u16len < 0) { |
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return getEmptyString(); |
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} |
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SharedBuffer* buf = SharedBuffer::alloc(sizeof(char16_t)*(u16len+1)); |
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if (buf) { |
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u8cur = (const uint8_t*) u8str; |
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char16_t* u16str = (char16_t*)buf->data(); |
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utf8_to_utf16(u8cur, u8len, u16str, ((size_t) u16len) + 1); |
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//printf("Created UTF-16 string from UTF-8 \"%s\":", in); |
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//printHexData(1, str, buf->size(), 16, 1); |
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//printf("\n"); |
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return u16str; |
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} |
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return getEmptyString(); |
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} |
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static char16_t* allocFromUTF16(const char16_t* u16str, size_t u16len) { |
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if (u16len >= SIZE_MAX / sizeof(char16_t)) { |
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android_errorWriteLog(0x534e4554, "73826242"); |
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abort(); |
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} |
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SharedBuffer* buf = SharedBuffer::alloc((u16len + 1) * sizeof(char16_t)); |
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ALOG_ASSERT(buf, "Unable to allocate shared buffer"); |
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if (buf) { |
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char16_t* str = (char16_t*)buf->data(); |
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memcpy(str, u16str, u16len * sizeof(char16_t)); |
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str[u16len] = 0; |
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return str; |
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} |
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return getEmptyString(); |
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} |
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// --------------------------------------------------------------------------- |
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String16::String16() |
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: mString(getEmptyString()) |
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{ |
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} |
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String16::String16(StaticLinkage) |
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: mString(0) |
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{ |
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// this constructor is used when we can't rely on the static-initializers |
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// having run. In this case we always allocate an empty string. It's less |
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// efficient than using getEmptyString(), but we assume it's uncommon. |
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char16_t* data = static_cast<char16_t*>( |
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SharedBuffer::alloc(sizeof(char16_t))->data()); |
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data[0] = 0; |
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mString = data; |
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} |
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String16::String16(const String16& o) |
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: mString(o.mString) |
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{ |
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SharedBuffer::bufferFromData(mString)->acquire(); |
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} |
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String16::String16(const String16& o, size_t len, size_t begin) |
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: mString(getEmptyString()) |
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{ |
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setTo(o, len, begin); |
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} |
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String16::String16(const char16_t* o) : mString(allocFromUTF16(o, strlen16(o))) {} |
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String16::String16(const char16_t* o, size_t len) : mString(allocFromUTF16(o, len)) {} |
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String16::String16(const String8& o) |
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: mString(allocFromUTF8(o.string(), o.size())) |
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{ |
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} |
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String16::String16(const char* o) |
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: mString(allocFromUTF8(o, strlen(o))) |
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{ |
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} |
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String16::String16(const char* o, size_t len) |
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: mString(allocFromUTF8(o, len)) |
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{ |
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} |
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String16::~String16() |
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{ |
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SharedBuffer::bufferFromData(mString)->release(); |
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} |
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size_t String16::size() const |
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{ |
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return SharedBuffer::sizeFromData(mString)/sizeof(char16_t)-1; |
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} |
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void String16::setTo(const String16& other) |
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{ |
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SharedBuffer::bufferFromData(other.mString)->acquire(); |
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SharedBuffer::bufferFromData(mString)->release(); |
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mString = other.mString; |
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} |
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status_t String16::setTo(const String16& other, size_t len, size_t begin) |
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{ |
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const size_t N = other.size(); |
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if (begin >= N) { |
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SharedBuffer::bufferFromData(mString)->release(); |
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mString = getEmptyString(); |
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return NO_ERROR; |
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} |
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if ((begin+len) > N) len = N-begin; |
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if (begin == 0 && len == N) { |
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setTo(other); |
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return NO_ERROR; |
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} |
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if (&other == this) { |
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LOG_ALWAYS_FATAL("Not implemented"); |
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} |
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return setTo(other.string()+begin, len); |
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} |
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status_t String16::setTo(const char16_t* other) |
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{ |
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return setTo(other, strlen16(other)); |
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} |
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status_t String16::setTo(const char16_t* other, size_t len) |
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{ |
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if (len >= SIZE_MAX / sizeof(char16_t)) { |
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android_errorWriteLog(0x534e4554, "73826242"); |
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abort(); |
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} |
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SharedBuffer* buf = SharedBuffer::bufferFromData(mString) |
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->editResize((len+1)*sizeof(char16_t)); |
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if (buf) { |
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char16_t* str = (char16_t*)buf->data(); |
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memmove(str, other, len*sizeof(char16_t)); |
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str[len] = 0; |
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mString = str; |
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return NO_ERROR; |
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} |
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return NO_MEMORY; |
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} |
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status_t String16::append(const String16& other) |
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{ |
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const size_t myLen = size(); |
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const size_t otherLen = other.size(); |
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if (myLen == 0) { |
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setTo(other); |
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return NO_ERROR; |
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} else if (otherLen == 0) { |
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return NO_ERROR; |
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} |
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if (myLen >= SIZE_MAX / sizeof(char16_t) - otherLen) { |
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android_errorWriteLog(0x534e4554, "73826242"); |
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abort(); |
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} |
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SharedBuffer* buf = SharedBuffer::bufferFromData(mString) |
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->editResize((myLen+otherLen+1)*sizeof(char16_t)); |
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if (buf) { |
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char16_t* str = (char16_t*)buf->data(); |
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memcpy(str+myLen, other, (otherLen+1)*sizeof(char16_t)); |
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mString = str; |
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return NO_ERROR; |
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} |
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return NO_MEMORY; |
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} |
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status_t String16::append(const char16_t* chrs, size_t otherLen) |
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{ |
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const size_t myLen = size(); |
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if (myLen == 0) { |
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setTo(chrs, otherLen); |
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return NO_ERROR; |
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} else if (otherLen == 0) { |
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return NO_ERROR; |
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} |
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if (myLen >= SIZE_MAX / sizeof(char16_t) - otherLen) { |
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android_errorWriteLog(0x534e4554, "73826242"); |
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abort(); |
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} |
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SharedBuffer* buf = SharedBuffer::bufferFromData(mString) |
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->editResize((myLen+otherLen+1)*sizeof(char16_t)); |
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if (buf) { |
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char16_t* str = (char16_t*)buf->data(); |
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memcpy(str+myLen, chrs, otherLen*sizeof(char16_t)); |
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str[myLen+otherLen] = 0; |
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mString = str; |
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return NO_ERROR; |
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} |
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return NO_MEMORY; |
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} |
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status_t String16::insert(size_t pos, const char16_t* chrs) |
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{ |
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return insert(pos, chrs, strlen16(chrs)); |
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} |
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status_t String16::insert(size_t pos, const char16_t* chrs, size_t len) |
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{ |
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const size_t myLen = size(); |
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if (myLen == 0) { |
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return setTo(chrs, len); |
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return NO_ERROR; |
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} else if (len == 0) { |
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return NO_ERROR; |
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} |
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if (pos > myLen) pos = myLen; |
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#if 0 |
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printf("Insert in to %s: pos=%d, len=%d, myLen=%d, chrs=%s\n", |
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String8(*this).string(), pos, |
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len, myLen, String8(chrs, len).string()); |
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#endif |
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SharedBuffer* buf = SharedBuffer::bufferFromData(mString) |
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->editResize((myLen+len+1)*sizeof(char16_t)); |
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if (buf) { |
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char16_t* str = (char16_t*)buf->data(); |
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if (pos < myLen) { |
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memmove(str+pos+len, str+pos, (myLen-pos)*sizeof(char16_t)); |
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} |
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memcpy(str+pos, chrs, len*sizeof(char16_t)); |
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str[myLen+len] = 0; |
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mString = str; |
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#if 0 |
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printf("Result (%d chrs): %s\n", size(), String8(*this).string()); |
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#endif |
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return NO_ERROR; |
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} |
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return NO_MEMORY; |
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} |
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ssize_t String16::findFirst(char16_t c) const |
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{ |
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const char16_t* str = string(); |
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const char16_t* p = str; |
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const char16_t* e = p + size(); |
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while (p < e) { |
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if (*p == c) { |
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return p-str; |
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} |
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p++; |
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} |
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return -1; |
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} |
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ssize_t String16::findLast(char16_t c) const |
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{ |
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const char16_t* str = string(); |
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const char16_t* p = str; |
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const char16_t* e = p + size(); |
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while (p < e) { |
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e--; |
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if (*e == c) { |
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return e-str; |
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} |
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} |
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return -1; |
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} |
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bool String16::startsWith(const String16& prefix) const |
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{ |
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const size_t ps = prefix.size(); |
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if (ps > size()) return false; |
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return strzcmp16(mString, ps, prefix.string(), ps) == 0; |
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} |
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bool String16::startsWith(const char16_t* prefix) const |
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{ |
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const size_t ps = strlen16(prefix); |
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if (ps > size()) return false; |
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return strncmp16(mString, prefix, ps) == 0; |
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} |
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bool String16::contains(const char16_t* chrs) const |
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{ |
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return strstr16(mString, chrs) != nullptr; |
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} |
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status_t String16::makeLower() |
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{ |
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const size_t N = size(); |
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const char16_t* str = string(); |
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char16_t* edit = NULL; |
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for (size_t i=0; i<N; i++) { |
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const char16_t v = str[i]; |
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if (v >= 'A' && v <= 'Z') { |
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if (!edit) { |
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SharedBuffer* buf = SharedBuffer::bufferFromData(mString)->edit(); |
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if (!buf) { |
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return NO_MEMORY; |
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} |
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edit = (char16_t*)buf->data(); |
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mString = str = edit; |
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} |
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edit[i] = tolower((char)v); |
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} |
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} |
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return NO_ERROR; |
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} |
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status_t String16::replaceAll(char16_t replaceThis, char16_t withThis) |
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{ |
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const size_t N = size(); |
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const char16_t* str = string(); |
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char16_t* edit = NULL; |
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for (size_t i=0; i<N; i++) { |
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if (str[i] == replaceThis) { |
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if (!edit) { |
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SharedBuffer* buf = SharedBuffer::bufferFromData(mString)->edit(); |
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if (!buf) { |
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return NO_MEMORY; |
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} |
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edit = (char16_t*)buf->data(); |
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mString = str = edit; |
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} |
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edit[i] = withThis; |
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} |
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} |
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return NO_ERROR; |
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} |
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status_t String16::remove(size_t len, size_t begin) |
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{ |
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const size_t N = size(); |
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if (begin >= N) { |
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SharedBuffer::bufferFromData(mString)->release(); |
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mString = getEmptyString(); |
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return NO_ERROR; |
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} |
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if ((begin+len) > N) len = N-begin; |
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if (begin == 0 && len == N) { |
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return NO_ERROR; |
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} |
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if (begin > 0) { |
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SharedBuffer* buf = SharedBuffer::bufferFromData(mString) |
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->editResize((N+1)*sizeof(char16_t)); |
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if (!buf) { |
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return NO_MEMORY; |
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} |
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char16_t* str = (char16_t*)buf->data(); |
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memmove(str, str+begin, (N-begin+1)*sizeof(char16_t)); |
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mString = str; |
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} |
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SharedBuffer* buf = SharedBuffer::bufferFromData(mString) |
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->editResize((len+1)*sizeof(char16_t)); |
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if (buf) { |
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char16_t* str = (char16_t*)buf->data(); |
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str[len] = 0; |
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mString = str; |
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return NO_ERROR; |
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} |
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return NO_MEMORY; |
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} |
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}; // namespace android
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