move libs/utils to libutils

Change-Id: I6cf4268599460791414882f91eeb88a992fbd29d

1 files changed, 422 insertions, 0 deletions

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 <utils/String16.h>
+
+#include <utils/Debug.h>
+#include <utils/Log.h>
+#include <utils/Unicode.h>
+#include <utils/String8.h>
+#include <utils/threads.h>
+
+#include <memory.h>
+#include <stdio.h>
+#include <ctype.h>
+
+
+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<char16_t*>(
+            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<N; i++) {
+        const char16_t v = str[i];
+        if (v >= '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; i<N; i++) {
+        if (str[i] == replaceThis) {
+            if (!edit) {
+                SharedBuffer* buf = SharedBuffer::bufferFromData(mString)->edit();
+                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