From d98e07fdf9c338589f263c47ce5c844ed43efad5 Mon Sep 17 00:00:00 2001 From: Alex Ray Date: Fri, 2 Aug 2013 14:40:08 -0700 Subject: move libs/utils to libutils Change-Id: I6cf4268599460791414882f91eeb88a992fbd29d --- libutils/String16.cpp | 422 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 422 insertions(+) create mode 100644 libutils/String16.cpp (limited to 'libutils/String16.cpp') diff --git a/libutils/String16.cpp b/libutils/String16.cpp new file mode 100644 index 0000000..b09b728 --- /dev/null +++ b/libutils/String16.cpp @@ -0,0 +1,422 @@ +/* + * 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. + */ + +#include + +#include +#include +#include +#include +#include + +#include +#include +#include + + +namespace android { + +static SharedBuffer* gEmptyStringBuf = NULL; +static char16_t* gEmptyString = NULL; + +static inline char16_t* getEmptyString() +{ + gEmptyStringBuf->acquire(); + return gEmptyString; +} + +void initialize_string16() +{ + SharedBuffer* buf = SharedBuffer::alloc(sizeof(char16_t)); + char16_t* str = (char16_t*)buf->data(); + *str = 0; + gEmptyStringBuf = buf; + gEmptyString = str; +} + +void terminate_string16() +{ + SharedBuffer::bufferFromData(gEmptyString)->release(); + gEmptyStringBuf = NULL; + gEmptyString = NULL; +} + +// --------------------------------------------------------------------------- + +static char16_t* allocFromUTF8(const char* u8str, size_t u8len) +{ + if (u8len == 0) return getEmptyString(); + + const uint8_t* u8cur = (const uint8_t*) u8str; + + const ssize_t u16len = utf8_to_utf16_length(u8cur, u8len); + if (u16len < 0) { + return getEmptyString(); + } + + const uint8_t* const u8end = u8cur + u8len; + + SharedBuffer* buf = SharedBuffer::alloc(sizeof(char16_t)*(u16len+1)); + if (buf) { + u8cur = (const uint8_t*) u8str; + char16_t* u16str = (char16_t*)buf->data(); + + utf8_to_utf16(u8cur, u8len, u16str); + + //printf("Created UTF-16 string from UTF-8 \"%s\":", in); + //printHexData(1, str, buf->size(), 16, 1); + //printf("\n"); + + return u16str; + } + + return getEmptyString(); +} + +// --------------------------------------------------------------------------- + +String16::String16() + : mString(getEmptyString()) +{ +} + +String16::String16(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. + + char16_t* data = static_cast( + SharedBuffer::alloc(sizeof(char16_t))->data()); + data[0] = 0; + mString = data; +} + +String16::String16(const String16& o) + : mString(o.mString) +{ + SharedBuffer::bufferFromData(mString)->acquire(); +} + +String16::String16(const String16& o, size_t len, size_t begin) + : mString(getEmptyString()) +{ + setTo(o, len, begin); +} + +String16::String16(const char16_t* o) +{ + size_t len = strlen16(o); + SharedBuffer* buf = SharedBuffer::alloc((len+1)*sizeof(char16_t)); + ALOG_ASSERT(buf, "Unable to allocate shared buffer"); + if (buf) { + char16_t* str = (char16_t*)buf->data(); + strcpy16(str, o); + mString = str; + return; + } + + mString = getEmptyString(); +} + +String16::String16(const char16_t* o, size_t len) +{ + SharedBuffer* buf = SharedBuffer::alloc((len+1)*sizeof(char16_t)); + ALOG_ASSERT(buf, "Unable to allocate shared buffer"); + if (buf) { + char16_t* str = (char16_t*)buf->data(); + memcpy(str, o, len*sizeof(char16_t)); + str[len] = 0; + mString = str; + return; + } + + mString = getEmptyString(); +} + +String16::String16(const String8& o) + : mString(allocFromUTF8(o.string(), o.size())) +{ +} + +String16::String16(const char* o) + : mString(allocFromUTF8(o, strlen(o))) +{ +} + +String16::String16(const char* o, size_t len) + : mString(allocFromUTF8(o, len)) +{ +} + +String16::~String16() +{ + SharedBuffer::bufferFromData(mString)->release(); +} + +void String16::setTo(const String16& other) +{ + SharedBuffer::bufferFromData(other.mString)->acquire(); + SharedBuffer::bufferFromData(mString)->release(); + mString = other.mString; +} + +status_t String16::setTo(const String16& other, size_t len, size_t begin) +{ + const size_t N = other.size(); + if (begin >= N) { + SharedBuffer::bufferFromData(mString)->release(); + mString = getEmptyString(); + return NO_ERROR; + } + if ((begin+len) > N) len = N-begin; + if (begin == 0 && len == N) { + setTo(other); + return NO_ERROR; + } + + if (&other == this) { + LOG_ALWAYS_FATAL("Not implemented"); + } + + return setTo(other.string()+begin, len); +} + +status_t String16::setTo(const char16_t* other) +{ + return setTo(other, strlen16(other)); +} + +status_t String16::setTo(const char16_t* other, size_t len) +{ + SharedBuffer* buf = SharedBuffer::bufferFromData(mString) + ->editResize((len+1)*sizeof(char16_t)); + if (buf) { + char16_t* str = (char16_t*)buf->data(); + memmove(str, other, len*sizeof(char16_t)); + str[len] = 0; + mString = str; + return NO_ERROR; + } + return NO_MEMORY; +} + +status_t String16::append(const String16& other) +{ + const size_t myLen = size(); + const size_t otherLen = other.size(); + if (myLen == 0) { + setTo(other); + return NO_ERROR; + } else if (otherLen == 0) { + return NO_ERROR; + } + + SharedBuffer* buf = SharedBuffer::bufferFromData(mString) + ->editResize((myLen+otherLen+1)*sizeof(char16_t)); + if (buf) { + char16_t* str = (char16_t*)buf->data(); + memcpy(str+myLen, other, (otherLen+1)*sizeof(char16_t)); + mString = str; + return NO_ERROR; + } + return NO_MEMORY; +} + +status_t String16::append(const char16_t* chrs, size_t otherLen) +{ + const size_t myLen = size(); + if (myLen == 0) { + setTo(chrs, otherLen); + return NO_ERROR; + } else if (otherLen == 0) { + return NO_ERROR; + } + + SharedBuffer* buf = SharedBuffer::bufferFromData(mString) + ->editResize((myLen+otherLen+1)*sizeof(char16_t)); + if (buf) { + char16_t* str = (char16_t*)buf->data(); + memcpy(str+myLen, chrs, otherLen*sizeof(char16_t)); + str[myLen+otherLen] = 0; + mString = str; + return NO_ERROR; + } + return NO_MEMORY; +} + +status_t String16::insert(size_t pos, const char16_t* chrs) +{ + return insert(pos, chrs, strlen16(chrs)); +} + +status_t String16::insert(size_t pos, const char16_t* chrs, size_t len) +{ + const size_t myLen = size(); + if (myLen == 0) { + return setTo(chrs, len); + return NO_ERROR; + } else if (len == 0) { + return NO_ERROR; + } + + if (pos > myLen) pos = myLen; + + #if 0 + printf("Insert in to %s: pos=%d, len=%d, myLen=%d, chrs=%s\n", + String8(*this).string(), pos, + len, myLen, String8(chrs, len).string()); + #endif + + SharedBuffer* buf = SharedBuffer::bufferFromData(mString) + ->editResize((myLen+len+1)*sizeof(char16_t)); + if (buf) { + char16_t* str = (char16_t*)buf->data(); + if (pos < myLen) { + memmove(str+pos+len, str+pos, (myLen-pos)*sizeof(char16_t)); + } + memcpy(str+pos, chrs, len*sizeof(char16_t)); + str[myLen+len] = 0; + mString = str; + #if 0 + printf("Result (%d chrs): %s\n", size(), String8(*this).string()); + #endif + return NO_ERROR; + } + return NO_MEMORY; +} + +ssize_t String16::findFirst(char16_t c) const +{ + const char16_t* str = string(); + const char16_t* p = str; + const char16_t* e = p + size(); + while (p < e) { + if (*p == c) { + return p-str; + } + p++; + } + return -1; +} + +ssize_t String16::findLast(char16_t c) const +{ + const char16_t* str = string(); + const char16_t* p = str; + const char16_t* e = p + size(); + while (p < e) { + e--; + if (*e == c) { + return e-str; + } + } + return -1; +} + +bool String16::startsWith(const String16& prefix) const +{ + const size_t ps = prefix.size(); + if (ps > size()) return false; + return strzcmp16(mString, ps, prefix.string(), ps) == 0; +} + +bool String16::startsWith(const char16_t* prefix) const +{ + const size_t ps = strlen16(prefix); + if (ps > size()) return false; + return strncmp16(mString, prefix, ps) == 0; +} + +status_t String16::makeLower() +{ + const size_t N = size(); + const char16_t* str = string(); + char16_t* edit = NULL; + for (size_t i=0; i= 'A' && v <= 'Z') { + if (!edit) { + SharedBuffer* buf = SharedBuffer::bufferFromData(mString)->edit(); + if (!buf) { + return NO_MEMORY; + } + edit = (char16_t*)buf->data(); + mString = str = edit; + } + edit[i] = tolower((char)v); + } + } + return NO_ERROR; +} + +status_t String16::replaceAll(char16_t replaceThis, char16_t withThis) +{ + const size_t N = size(); + const char16_t* str = string(); + char16_t* edit = NULL; + for (size_t i=0; iedit(); + if (!buf) { + return NO_MEMORY; + } + edit = (char16_t*)buf->data(); + mString = str = edit; + } + edit[i] = withThis; + } + } + return NO_ERROR; +} + +status_t String16::remove(size_t len, size_t begin) +{ + const size_t N = size(); + if (begin >= N) { + SharedBuffer::bufferFromData(mString)->release(); + mString = getEmptyString(); + return NO_ERROR; + } + if ((begin+len) > N) len = N-begin; + if (begin == 0 && len == N) { + return NO_ERROR; + } + + if (begin > 0) { + SharedBuffer* buf = SharedBuffer::bufferFromData(mString) + ->editResize((N+1)*sizeof(char16_t)); + if (!buf) { + return NO_MEMORY; + } + char16_t* str = (char16_t*)buf->data(); + memmove(str, str+begin, (N-begin+1)*sizeof(char16_t)); + mString = str; + } + SharedBuffer* buf = SharedBuffer::bufferFromData(mString) + ->editResize((len+1)*sizeof(char16_t)); + if (buf) { + char16_t* str = (char16_t*)buf->data(); + str[len] = 0; + mString = str; + return NO_ERROR; + } + return NO_MEMORY; +} + +}; // namespace android -- cgit v1.1