634 lines
15 KiB
C++
634 lines
15 KiB
C++
/*
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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/Debug.h>
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#include <utils/Log.h>
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#include <utils/String8.h>
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#include <utils/TextOutput.h>
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#include <utils/threads.h>
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#include <private/utils/Static.h>
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#ifdef HAVE_WINSOCK
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# undef nhtol
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# undef htonl
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# undef nhtos
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# undef htons
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# ifdef HAVE_LITTLE_ENDIAN
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# define ntohl(x) ( ((x) << 24) | (((x) >> 24) & 255) | (((x) << 8) & 0xff0000) | (((x) >> 8) & 0xff00) )
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# define htonl(x) ntohl(x)
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# define ntohs(x) ( (((x) << 8) & 0xff00) | (((x) >> 8) & 255) )
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# define htons(x) ntohs(x)
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# else
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# define ntohl(x) (x)
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# define htonl(x) (x)
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# define ntohs(x) (x)
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# define htons(x) (x)
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# endif
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#else
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# include <netinet/in.h>
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#endif
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#include <memory.h>
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#include <stdio.h>
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#include <ctype.h>
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// ---------------------------------------------------------------------------
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int strcmp16(const char16_t *s1, const char16_t *s2)
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{
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char16_t ch;
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int d = 0;
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while ( 1 ) {
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d = (int)(ch = *s1++) - (int)*s2++;
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if ( d || !ch )
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break;
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}
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return d;
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}
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int strncmp16(const char16_t *s1, const char16_t *s2, size_t n)
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{
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char16_t ch;
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int d = 0;
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while ( n-- ) {
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d = (int)(ch = *s1++) - (int)*s2++;
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if ( d || !ch )
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break;
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}
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return d;
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}
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char16_t *strcpy16(char16_t *dst, const char16_t *src)
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{
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char16_t *q = dst;
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const char16_t *p = src;
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char16_t ch;
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do {
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*q++ = ch = *p++;
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} while ( ch );
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return dst;
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}
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size_t strlen16(const char16_t *s)
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{
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const char16_t *ss = s;
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while ( *ss )
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ss++;
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return ss-s;
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}
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char16_t *strncpy16(char16_t *dst, const char16_t *src, size_t n)
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{
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char16_t *q = dst;
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const char16_t *p = src;
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char ch;
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while (n) {
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n--;
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*q++ = ch = *p++;
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if ( !ch )
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break;
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}
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*q = 0;
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return dst;
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}
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size_t strnlen16(const char16_t *s, size_t maxlen)
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{
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const char16_t *ss = s;
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/* Important: the maxlen test must precede the reference through ss;
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since the byte beyond the maximum may segfault */
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while ((maxlen > 0) && *ss) {
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ss++;
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maxlen--;
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}
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return ss-s;
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}
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int strzcmp16(const char16_t *s1, size_t n1, const char16_t *s2, size_t n2)
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{
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const char16_t* e1 = s1+n1;
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const char16_t* e2 = s2+n2;
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while (s1 < e1 && s2 < e2) {
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const int d = (int)*s1++ - (int)*s2++;
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if (d) {
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return d;
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}
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}
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return n1 < n2
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? (0 - (int)*s2)
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: (n1 > n2
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? ((int)*s1 - 0)
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: 0);
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}
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int strzcmp16_h_n(const char16_t *s1H, size_t n1, const char16_t *s2N, size_t n2)
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{
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const char16_t* e1 = s1H+n1;
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const char16_t* e2 = s2N+n2;
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while (s1H < e1 && s2N < e2) {
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const char16_t c2 = ntohs(*s2N);
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const int d = (int)*s1H++ - (int)c2;
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s2N++;
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if (d) {
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return d;
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}
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}
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return n1 < n2
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? (0 - (int)ntohs(*s2N))
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: (n1 > n2
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? ((int)*s1H - 0)
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: 0);
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}
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static inline size_t
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utf8_char_len(uint8_t ch)
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{
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return ((0xe5000000 >> ((ch >> 3) & 0x1e)) & 3) + 1;
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}
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#define UTF8_SHIFT_AND_MASK(unicode, byte) (unicode)<<=6; (unicode) |= (0x3f & (byte));
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static inline uint32_t
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utf8_to_utf32(const uint8_t *src, size_t length)
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{
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uint32_t unicode;
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switch (length)
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{
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case 1:
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return src[0];
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case 2:
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unicode = src[0] & 0x1f;
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UTF8_SHIFT_AND_MASK(unicode, src[1])
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return unicode;
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case 3:
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unicode = src[0] & 0x0f;
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UTF8_SHIFT_AND_MASK(unicode, src[1])
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UTF8_SHIFT_AND_MASK(unicode, src[2])
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return unicode;
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case 4:
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unicode = src[0] & 0x07;
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UTF8_SHIFT_AND_MASK(unicode, src[1])
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UTF8_SHIFT_AND_MASK(unicode, src[2])
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UTF8_SHIFT_AND_MASK(unicode, src[3])
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return unicode;
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default:
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return 0xffff;
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}
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//printf("Char at %p: len=%d, utf-16=%p\n", src, length, (void*)result);
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}
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void
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utf8_to_utf16(const uint8_t *src, size_t srcLen,
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char16_t* dst, const size_t dstLen)
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{
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const uint8_t* const end = src + srcLen;
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const char16_t* const dstEnd = dst + dstLen;
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while (src < end && dst < dstEnd) {
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size_t len = utf8_char_len(*src);
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uint32_t codepoint = utf8_to_utf32((const uint8_t*)src, len);
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// Convert the UTF32 codepoint to one or more UTF16 codepoints
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if (codepoint <= 0xFFFF) {
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// Single UTF16 character
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*dst++ = (char16_t) codepoint;
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} else {
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// Multiple UTF16 characters with surrogates
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codepoint = codepoint - 0x10000;
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*dst++ = (char16_t) ((codepoint >> 10) + 0xD800);
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*dst++ = (char16_t) ((codepoint & 0x3FF) + 0xDC00);
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}
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src += len;
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}
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if (dst < dstEnd) {
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*dst = 0;
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}
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}
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// ---------------------------------------------------------------------------
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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* in, size_t len)
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{
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if (len == 0) return getEmptyString();
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size_t chars = 0;
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const char* end = in+len;
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const char* p = in;
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while (p < end) {
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chars++;
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int utf8len = utf8_char_len(*p);
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uint32_t codepoint = utf8_to_utf32((const uint8_t*)p, utf8len);
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if (codepoint > 0xFFFF) chars++; // this will be a surrogate pair in utf16
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p += utf8len;
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}
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size_t bufSize = (chars+1)*sizeof(char16_t);
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SharedBuffer* buf = SharedBuffer::alloc(bufSize);
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if (buf) {
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p = in;
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char16_t* str = (char16_t*)buf->data();
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utf8_to_utf16((const uint8_t*)p, len, str, bufSize);
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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 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(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)
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{
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size_t len = strlen16(o);
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SharedBuffer* buf = SharedBuffer::alloc((len+1)*sizeof(char16_t));
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LOG_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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strcpy16(str, o);
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mString = str;
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return;
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}
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mString = getEmptyString();
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}
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String16::String16(const char16_t* o, size_t len)
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{
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SharedBuffer* buf = SharedBuffer::alloc((len+1)*sizeof(char16_t));
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LOG_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, o, len*sizeof(char16_t));
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str[len] = 0;
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mString = str;
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return;
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}
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mString = getEmptyString();
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}
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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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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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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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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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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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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;
|
|
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;
|
|
}
|
|
|
|
TextOutput& operator<<(TextOutput& to, const String16& val)
|
|
{
|
|
to << String8(val).string();
|
|
return to;
|
|
}
|
|
|
|
}; // namespace android
|