849 lines
20 KiB
C++
849 lines
20 KiB
C++
// natString.cc - Implementation of java.lang.String native methods.
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/* Copyright (C) 1998, 1999 Red Hat, Inc.
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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#include <config.h>
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#include <string.h>
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#include <stdlib.h>
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#include <gcj/cni.h>
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#include <java/lang/Character.h>
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#include <java/lang/String.h>
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#include <java/lang/IndexOutOfBoundsException.h>
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#include <java/lang/ArrayIndexOutOfBoundsException.h>
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#include <java/lang/StringIndexOutOfBoundsException.h>
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#include <java/lang/NullPointerException.h>
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#include <java/io/ByteArrayOutputStream.h>
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#include <java/io/OutputStreamWriter.h>
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#include <java/io/ByteArrayInputStream.h>
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#include <java/io/InputStreamReader.h>
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#include <gnu/gcj/convert/UnicodeToBytes.h>
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#include <gnu/gcj/convert/BytesToUnicode.h>
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#include <jvm.h>
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static jstring* strhash = NULL;
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static int strhash_count = 0; /* Number of slots used in strhash. */
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static int strhash_size = 0; /* Number of slots available in strhash.
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* Assumed be power of 2! */
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#define DELETED_STRING ((jstring)(~0))
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#define SET_STRING_IS_INTERNED(STR) /* nothing */
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/* Find a slot where the string with elements DATA, length LEN,
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and hash HASH should go in the strhash table of interned strings. */
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jstring*
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_Jv_StringFindSlot (jchar* data, jint len, jint hash)
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{
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JvSynchronize sync (&StringClass);
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int start_index = hash & (strhash_size - 1);
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int deleted_index = -1;
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register int index = start_index;
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/* step must be non-zero, and relatively prime with strhash_size. */
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int step = 8 * hash + 7;
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for (;;)
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{
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register jstring* ptr = &strhash[index];
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if (*ptr == NULL)
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{
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if (deleted_index >= 0)
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return (&strhash[deleted_index]);
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else
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return ptr;
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}
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else if (*ptr == DELETED_STRING)
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deleted_index = index;
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else if ((*ptr)->length() == len
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&& memcmp(JvGetStringChars(*ptr), data, 2*len) == 0)
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return (ptr);
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index = (index + step) & (strhash_size - 1);
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JvAssert (index != start_index);
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}
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}
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/* Calculate a hash code for the string starting at PTR at given LENGTH.
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This uses the same formula as specified for java.lang.String.hash. */
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static jint
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hashChars (jchar* ptr, jint length)
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{
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register jchar* limit = ptr + length;
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jint hash = 0;
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// Updated specification from
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// http://www.javasoft.com/docs/books/jls/clarify.html.
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while (ptr < limit)
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hash = (31 * hash) + *ptr++;
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return hash;
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}
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jint
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java::lang::String::hashCode()
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{
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return hashChars(JvGetStringChars(this), length());
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}
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jstring*
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_Jv_StringGetSlot (jstring str)
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{
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jchar* data = JvGetStringChars(str);
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int length = str->length();
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return _Jv_StringFindSlot(data, length, hashChars (data, length));
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}
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void
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java::lang::String::rehash()
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{
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JvSynchronize sync (&StringClass);
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if (strhash == NULL)
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{
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strhash_size = 1024;
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strhash = (jstring *) _Jv_AllocBytes (strhash_size * sizeof (jstring));
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memset (strhash, 0, strhash_size * sizeof (jstring));
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}
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else
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{
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register int i = strhash_size;
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register jstring* ptr = strhash + i;
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strhash_size *= 2;
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strhash = (jstring *) _Jv_AllocBytes (strhash_size * sizeof (jstring));
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memset (strhash, 0, strhash_size * sizeof (jstring));
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while (--i >= 0)
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{
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--ptr;
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if (*ptr == NULL || *ptr == DELETED_STRING)
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continue;
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/* This is faster equivalent of
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* *__JvGetInternSlot(*ptr) = *ptr; */
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jint hash = (*ptr)->hashCode();
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jint index = hash & (strhash_size - 1);
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jint step = 8 * hash + 7;
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for (;;)
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{
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if (strhash[index] == NULL)
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{
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strhash[index] = *ptr;
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break;
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}
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index = (index + step) & (strhash_size - 1);
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}
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}
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}
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}
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jstring
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java::lang::String::intern()
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{
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JvSynchronize sync (&StringClass);
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if (4 * strhash_count >= 3 * strhash_size)
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rehash();
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jstring* ptr = _Jv_StringGetSlot(this);
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if (*ptr != NULL && *ptr != DELETED_STRING)
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return *ptr;
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SET_STRING_IS_INTERNED(this);
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strhash_count++;
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*ptr = this;
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return this;
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}
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/* Called by String fake finalizer. */
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void
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java::lang::String::unintern()
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{
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JvSynchronize sync (&StringClass);
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jstring* ptr = _Jv_StringGetSlot(this);
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if (*ptr == NULL || *ptr == DELETED_STRING)
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return;
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*ptr = DELETED_STRING;
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strhash_count--;
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}
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jstring
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_Jv_NewStringUTF (const char *bytes)
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{
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int size = strlen (bytes);
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unsigned char *p = (unsigned char *) bytes;
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int length = _Jv_strLengthUtf8 ((char *) p, size);
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if (length < 0)
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return NULL;
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jstring jstr = JvAllocString (length);
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jchar *chrs = JvGetStringChars (jstr);
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p = (unsigned char *) bytes;
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unsigned char *limit = p + size;
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while (p < limit)
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*chrs++ = UTF8_GET (p, limit);
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return jstr;
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}
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jstring
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_Jv_NewStringUtf8Const (Utf8Const* str)
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{
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jchar *chrs;
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jchar buffer[100];
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jstring jstr;
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register unsigned char* data = (unsigned char*) str->data;
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register unsigned char* limit = data + str->length;
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int length = _Jv_strLengthUtf8(str->data, str->length);
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if (length <= (int) (sizeof(buffer) / sizeof(jchar)))
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{
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jstr = NULL;
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chrs = buffer;
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}
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else
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{
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jstr = JvAllocString(length);
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chrs = JvGetStringChars(jstr);
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}
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while (data < limit)
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*chrs++ = UTF8_GET(data, limit);
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chrs -= length;
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JvSynchronize sync (&StringClass);
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if (4 * strhash_count >= 3 * strhash_size)
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java::lang::String::rehash();
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int hash = str->hash;
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jstring* ptr = _Jv_StringFindSlot (chrs, length, hash);
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if (*ptr != NULL && *ptr != DELETED_STRING)
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return *ptr;
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strhash_count++;
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if (jstr == NULL)
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{
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jstr = JvAllocString(length);
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chrs = JvGetStringChars(jstr);
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memcpy (chrs, buffer, sizeof(jchar)*length);
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}
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*ptr = jstr;
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SET_STRING_IS_INTERNED(jstr);
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return jstr;
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}
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jsize
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_Jv_GetStringUTFLength (jstring string)
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{
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register jsize len = 0;
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register jchar *ptr = JvGetStringChars (string);
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register jsize i = string->length();
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while (--i >= 0)
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{
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register jchar ch = *ptr++;
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if (ch > 0 && ch <= 0x7F)
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len += 1;
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else if (ch <= 0x7FF)
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len += 2;
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else
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len += 3;
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}
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return len;
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}
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// Not sure this quite matches GetStringUTFRegion.
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// null-termination of result? len? throw exception?
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jsize
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_Jv_GetStringUTFRegion (jstring str, jsize start, jsize len, char *buf)
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{
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register jchar *sptr = JvGetStringChars (str) + start;
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register jsize i = len;
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register char *dptr = buf;
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while (--i >= 0)
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{
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jchar ch = *sptr++;
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if (ch > 0 && ch <= 0x7F)
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*dptr++ = (char) ch;
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else if (ch <= 0x7FF)
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{
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*dptr++ = (char) (0xC0 + ((ch >> 6) & 0x1F));
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*dptr++ = (char) (0x80 + (ch & 0x3F));
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}
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else
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{
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*dptr++ = (char) (0xE0 + ((ch >> 12) & 0xF));
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*dptr++ = (char) (0x80 + ((ch >> 6) & 0x3F));
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*dptr++ = (char) (0x80 + (ch & 0x3F));
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}
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}
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return dptr - buf;
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}
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jstring
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_Jv_AllocString(jsize len)
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{
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jsize sz = sizeof(java::lang::String) + len * sizeof(jchar);
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jstring obj = (jstring) JvAllocObject(&StringClass, sz);
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obj->data = obj;
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obj->boffset = sizeof(java::lang::String);
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obj->count = len;
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return obj;
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}
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jstring
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_Jv_NewString(const jchar *chars, jsize len)
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{
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jstring str = _Jv_AllocString(len);
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jchar* data = JvGetStringChars (str);
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while (--len >= 0)
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*data++ = *chars++;
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return str;
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}
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jstring
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_Jv_NewStringLatin1(const char *bytes, jsize len)
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{
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jstring str = JvAllocString(len);
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jchar* data = JvGetStringChars (str);
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while (--len >= 0)
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*data++ = *(unsigned char*)bytes++;
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return str;
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}
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void
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java::lang::String::init ()
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{
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count = 0;
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boffset = sizeof(java::lang::String);
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data = this;
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}
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void
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java::lang::String::init(jcharArray chars, jint offset, jint count,
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jboolean dont_copy)
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{
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if (! chars)
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JvThrow (new NullPointerException);
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jsize data_size = JvGetArrayLength (chars);
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if (offset < 0 || count < 0 || offset + count < 0
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|| offset + count > data_size)
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JvThrow (new StringIndexOutOfBoundsException());
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jcharArray array;
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jchar *pdst;
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if (! dont_copy)
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{
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array = JvNewCharArray(count);
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pdst = elements (array);
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memcpy (pdst, elements (chars) + offset, count * sizeof (jchar));
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}
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else
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{
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JvAssert (offset == 0);
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array = chars;
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pdst = elements (array);
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}
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data = array;
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boffset = (char *) pdst - (char *) array;
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this->count = count;
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}
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void
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java::lang::String::init(jbyteArray ascii, jint hibyte, jint offset,
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jint count)
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{
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if (! ascii)
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JvThrow (new NullPointerException);
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jsize data_size = JvGetArrayLength (ascii);
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if (offset < 0 || count < 0 || offset + count < 0
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|| offset + count > data_size)
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JvThrow (new java::lang::StringIndexOutOfBoundsException());
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jcharArray array = JvNewCharArray(count);
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jbyte *psrc = elements (ascii) + offset;
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jchar *pdst = elements (array);
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data = array;
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boffset = (char *) pdst - (char *) array;
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this->count = count;
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hibyte = (hibyte & 0xff) << 8;
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while (-- count >= 0)
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{
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*pdst++ = hibyte | (*psrc++ & 0xff);
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}
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}
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void
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java::lang::String::init (jbyteArray bytes, jint offset, jint count,
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jstring encoding)
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{
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if (! bytes)
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JvThrow (new NullPointerException);
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jsize data_size = JvGetArrayLength (bytes);
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if (offset < 0 || count < 0 || offset + count < 0
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|| offset + count > data_size)
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JvThrow (new StringIndexOutOfBoundsException);
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jcharArray array = JvNewCharArray (count);
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gnu::gcj::convert::BytesToUnicode *converter
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= gnu::gcj::convert::BytesToUnicode::getDecoder(encoding);
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jint outpos = 0;
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int avail = count;
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converter->setInput(bytes, offset, offset+count);
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while (converter->inpos < converter->inlength)
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{
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int done = converter->read(array, outpos, avail);
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if (done == 0)
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{
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jint new_size = 2 * (outpos + avail);
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jcharArray new_array = JvNewCharArray (new_size);
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memcpy (elements (new_array), elements (array),
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outpos * sizeof(jchar));
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array = new_array;
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avail = new_size - outpos;
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}
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else
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{
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outpos += done;
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avail -= done;
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}
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}
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this->data = array;
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this->boffset = (char *) elements (array) - (char *) array;
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this->count = outpos;
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}
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jboolean
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java::lang::String::equals(jobject anObject)
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{
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if (anObject == NULL)
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return false;
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if (anObject == this)
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return true;
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if (anObject->getClass() != &StringClass)
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return false;
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jstring other = (jstring) anObject;
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if (count != other->count)
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return false;
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/* if both are interned, return false. */
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register jint i = count;
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register jchar *xptr = JvGetStringChars (this);
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register jchar *yptr = JvGetStringChars (other);
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while (--i >= 0)
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{
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if (*xptr++ != *yptr++)
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return false;
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}
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return true;
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}
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jchar
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java::lang::String::charAt(jint i)
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{
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if (i < 0 || i >= count)
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JvThrow (new java::lang::StringIndexOutOfBoundsException());
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return JvGetStringChars(this)[i];
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}
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void
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java::lang::String::getChars(jint srcBegin, jint srcEnd,
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jcharArray dst, jint dstBegin)
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{
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jint dst_length = JvGetArrayLength (dst);
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if (srcBegin < 0 || srcBegin > srcEnd || srcEnd > count
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|| dstBegin < 0 || dstBegin + (srcEnd-srcBegin) > dst_length)
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JvThrow (new java::lang::StringIndexOutOfBoundsException());
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register jchar *dPtr = elements (dst) + dstBegin;
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register jchar *sPtr = JvGetStringChars (this) + srcBegin;
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register jint i = srcEnd-srcBegin;
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while (--i >= 0)
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*dPtr++ = *sPtr++;
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}
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jbyteArray
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java::lang::String::getBytes (jstring enc)
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{
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jint todo = length();
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jint buflen = todo;
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jbyteArray buffer = JvNewByteArray(todo);
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jint bufpos = 0;
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jint offset = 0;
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gnu::gcj::convert::UnicodeToBytes *converter
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= gnu::gcj::convert::UnicodeToBytes::getEncoder(enc);
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while (todo > 0)
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{
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converter->setOutput(buffer, bufpos);
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int converted = converter->write(this, offset, todo, NULL);
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bufpos = converter->count;
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if (converted == 0)
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{
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buflen *= 2;
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jbyteArray newbuffer = JvNewByteArray(buflen);
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memcpy (elements (newbuffer), elements (buffer), bufpos);
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buffer = newbuffer;
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}
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else
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{
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offset += converted;
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todo -= converted;
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}
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}
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if (bufpos == buflen)
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return buffer;
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jbyteArray result = JvNewByteArray(bufpos);
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memcpy (elements (result), elements (buffer), bufpos);
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return result;
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}
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void
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java::lang::String::getBytes(jint srcBegin, jint srcEnd,
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jbyteArray dst, jint dstBegin)
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{
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jint dst_length = JvGetArrayLength (dst);
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if (srcBegin < 0 || srcBegin > srcEnd || srcEnd > count
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|| dstBegin < 0 || dstBegin + (srcEnd-srcBegin) > dst_length)
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JvThrow (new java::lang::StringIndexOutOfBoundsException());
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register jbyte *dPtr = elements (dst) + dstBegin;
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register jchar *sPtr = JvGetStringChars (this) + srcBegin;
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register jint i = srcEnd-srcBegin;
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while (--i >= 0)
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*dPtr++ = (jbyte) *sPtr++;
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}
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jcharArray
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java::lang::String::toCharArray()
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{
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jcharArray array = JvNewCharArray(count);
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register jchar *dPtr = elements (array);
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register jchar *sPtr = JvGetStringChars (this);
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register jint i = count;
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while (--i >= 0)
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*dPtr++ = *sPtr++;
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return array;
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}
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jboolean
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java::lang::String::equalsIgnoreCase (jstring anotherString)
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{
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if (anotherString == NULL || count != anotherString->count)
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return false;
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register jchar *tptr = JvGetStringChars (this);
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register jchar *optr = JvGetStringChars (anotherString);
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register jint i = count;
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while (--i >= 0)
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{
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jchar tch = *tptr++;
|
|
jchar och = *optr++;
|
|
if (tch != och
|
|
&& (java::lang::Character::toLowerCase (tch)
|
|
!= java::lang::Character::toLowerCase (och))
|
|
&& (java::lang::Character::toUpperCase (tch)
|
|
!= java::lang::Character::toUpperCase (och)))
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
jboolean
|
|
java::lang::String::regionMatches (jint toffset,
|
|
jstring other, jint ooffset, jint len)
|
|
{
|
|
if (toffset < 0 || ooffset < 0
|
|
|| toffset + len > count
|
|
|| ooffset + len > other->count)
|
|
return false;
|
|
register jchar *tptr = JvGetStringChars (this) + toffset;
|
|
register jchar *optr = JvGetStringChars (other) + ooffset;
|
|
register jint i = len;
|
|
while (--i >= 0)
|
|
{
|
|
if (*tptr++ != *optr++)
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
jint
|
|
java::lang::String::compareTo (jstring anotherString)
|
|
{
|
|
register jchar *tptr = JvGetStringChars (this);
|
|
register jchar *optr = JvGetStringChars (anotherString);
|
|
jint tlen = this->count;
|
|
jint olen = anotherString->count;
|
|
register jint i = tlen > olen ? olen : tlen;
|
|
while (--i >= 0)
|
|
{
|
|
jchar tch = *tptr++;
|
|
jchar och = *optr++;
|
|
if (tch != och)
|
|
return (jint) tch - (jint) och;
|
|
}
|
|
return tlen - olen;
|
|
}
|
|
|
|
jboolean
|
|
java::lang::String::regionMatches (jboolean ignoreCase, jint toffset,
|
|
jstring other, jint ooffset, jint len)
|
|
{
|
|
if (toffset < 0 || ooffset < 0
|
|
|| toffset + len > count
|
|
|| ooffset + len > other->count)
|
|
return false;
|
|
register jchar *tptr = JvGetStringChars (this) + toffset;
|
|
register jchar *optr = JvGetStringChars (other) + ooffset;
|
|
register jint i = len;
|
|
if (ignoreCase)
|
|
while (--i >= 0)
|
|
{
|
|
jchar tch = *tptr++;
|
|
jchar och = *optr++;
|
|
if ((java::lang::Character::toLowerCase (tch)
|
|
!= java::lang::Character::toLowerCase (och))
|
|
&& (java::lang::Character::toUpperCase (tch)
|
|
!= java::lang::Character::toUpperCase (och)))
|
|
return false;
|
|
}
|
|
else
|
|
while (--i >= 0)
|
|
{
|
|
jchar tch = *tptr++;
|
|
jchar och = *optr++;
|
|
if (tch != och)
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
jboolean
|
|
java::lang::String::startsWith (jstring prefix, jint toffset)
|
|
{
|
|
register jint i = prefix->count;
|
|
if (toffset < 0 || toffset + i > count)
|
|
return false;
|
|
register jchar *xptr = JvGetStringChars (this) + toffset;
|
|
register jchar *yptr = JvGetStringChars (prefix);
|
|
while (--i >= 0)
|
|
{
|
|
if (*xptr++ != *yptr++)
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
jint
|
|
java::lang::String::indexOf (jint ch, jint fromIndex)
|
|
{
|
|
if (fromIndex < 0)
|
|
fromIndex = 0;
|
|
register jchar *ptr = JvGetStringChars(this);
|
|
for (;; ++fromIndex)
|
|
{
|
|
if (fromIndex >= count)
|
|
return -1;
|
|
if (ptr[fromIndex] == ch)
|
|
return fromIndex;
|
|
}
|
|
}
|
|
|
|
jint
|
|
java::lang::String::indexOf (jstring s, jint fromIndex)
|
|
{
|
|
const jchar *const xchars = JvGetStringChars(s);
|
|
const jchar *const ychars = JvGetStringChars(this) + fromIndex;
|
|
|
|
const int xlength = s->length ();
|
|
const int ylength = length () - fromIndex;
|
|
|
|
int i = 0;
|
|
int j = 0;
|
|
|
|
while (i < ylength && j < xlength)
|
|
{
|
|
if (xchars[j] != ychars[i])
|
|
{
|
|
i = i - j + 1;
|
|
j = 0;
|
|
}
|
|
else
|
|
i++, j++;
|
|
}
|
|
|
|
if (j >= xlength)
|
|
return fromIndex + i - xlength;
|
|
else
|
|
return -1;
|
|
}
|
|
|
|
jint
|
|
java::lang::String::lastIndexOf (jint ch, jint fromIndex)
|
|
{
|
|
if (fromIndex >= count)
|
|
fromIndex = count - 1;
|
|
register jchar *ptr = JvGetStringChars(this);
|
|
for (;; --fromIndex)
|
|
{
|
|
if (fromIndex < 0)
|
|
return -1;
|
|
if (ptr[fromIndex] == ch)
|
|
return fromIndex;
|
|
}
|
|
}
|
|
|
|
jstring
|
|
java::lang::String::substring (jint beginIndex, jint endIndex)
|
|
{
|
|
if (beginIndex < 0 || endIndex > count || beginIndex > endIndex)
|
|
JvThrow (new StringIndexOutOfBoundsException());
|
|
if (beginIndex == 0 && endIndex == count)
|
|
return this;
|
|
jint newCount = endIndex - beginIndex;
|
|
if (newCount <= 8) // Optimization, mainly for GC.
|
|
return JvNewString(JvGetStringChars(this) + beginIndex, newCount);
|
|
jstring s = new String();
|
|
s->data = data;
|
|
s->count = newCount;
|
|
s->boffset = boffset + sizeof(jchar) * beginIndex;
|
|
return s;
|
|
}
|
|
|
|
jstring
|
|
java::lang::String::concat(jstring str)
|
|
{
|
|
jint str_count = str->count;
|
|
if (str_count == 0)
|
|
return this;
|
|
jstring result = JvAllocString(count + str_count);
|
|
register jchar *dstPtr = JvGetStringChars(result);
|
|
register jchar *srcPtr = JvGetStringChars(this);
|
|
register jint i = count;
|
|
while (--i >= 0)
|
|
*dstPtr++ = *srcPtr++;
|
|
srcPtr = JvGetStringChars(str);
|
|
i = str->count;
|
|
while (--i >= 0)
|
|
*dstPtr++ = *srcPtr++;
|
|
return result;
|
|
}
|
|
|
|
jstring
|
|
java::lang::String::replace (jchar oldChar, jchar newChar)
|
|
{
|
|
jint i;
|
|
jchar* chrs = JvGetStringChars (this);
|
|
for (i = 0; ; i++)
|
|
{
|
|
if (i == count)
|
|
return this;
|
|
if (chrs[i] == oldChar)
|
|
break;
|
|
}
|
|
jstring result = JvAllocString (count);
|
|
jchar *dPtr = JvGetStringChars (result);
|
|
for (int j = 0; j < i; j++)
|
|
*dPtr++ = chrs[j];
|
|
for (; i < count; i++)
|
|
{
|
|
jchar ch = chrs[i];
|
|
if (ch == oldChar)
|
|
ch = newChar;
|
|
*dPtr++ = ch;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
jstring
|
|
java::lang::String::toLowerCase ()
|
|
{
|
|
jint i;
|
|
jchar* chrs = JvGetStringChars(this);
|
|
jchar ch;
|
|
for (i = 0; ; i++)
|
|
{
|
|
if (i == count)
|
|
return this;
|
|
jchar origChar = chrs[i];
|
|
ch = java::lang::Character::toLowerCase(origChar);
|
|
if (ch != origChar)
|
|
break;
|
|
}
|
|
jstring result = JvAllocString(count);
|
|
jchar *dPtr = JvGetStringChars (result);
|
|
for (int j = 0; j < i; j++)
|
|
*dPtr++ = chrs[j];
|
|
*dPtr++ = ch; i++;
|
|
for (; i < count; i++)
|
|
{
|
|
*dPtr++ = java::lang::Character::toLowerCase(chrs[i]);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
jstring
|
|
java::lang::String::toUpperCase ()
|
|
{
|
|
jint i;
|
|
jchar* chrs = JvGetStringChars(this);
|
|
jchar ch;
|
|
for (i = 0; ; i++)
|
|
{
|
|
if (i == count)
|
|
return this;
|
|
jchar origChar = chrs[i];
|
|
ch = java::lang::Character::toUpperCase(origChar);
|
|
if (ch != origChar)
|
|
break;
|
|
}
|
|
jstring result = JvAllocString(count);
|
|
jchar *dPtr = JvGetStringChars (result);
|
|
for (int j = 0; j < i; j++)
|
|
*dPtr++ = chrs[j];
|
|
*dPtr++ = ch; i++;
|
|
for (; i < count; i++)
|
|
{
|
|
*dPtr++ = java::lang::Character::toUpperCase(chrs[i]);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
jstring
|
|
java::lang::String::trim ()
|
|
{
|
|
jchar* chrs = JvGetStringChars(this);
|
|
if (count == 0 || (chrs[0] > ' ' && chrs[count-1] > ' '))
|
|
return this;
|
|
jint preTrim = 0;
|
|
for (;; preTrim++)
|
|
{
|
|
if (preTrim == count)
|
|
return new String();
|
|
if (chrs[preTrim] > ' ')
|
|
break;
|
|
}
|
|
jint endTrim = count;
|
|
while (chrs[endTrim-1] <= ' ')
|
|
endTrim--;
|
|
return substring(preTrim, endTrim);
|
|
}
|
|
|
|
jstring
|
|
java::lang::String::valueOf(jcharArray data, jint offset, jint count)
|
|
{
|
|
jint data_length = JvGetArrayLength (data);
|
|
if (offset < 0 || count < 0 || offset+count > data_length)
|
|
JvThrow (new java::lang::IndexOutOfBoundsException());
|
|
register jstring result = JvAllocString(count);
|
|
register jchar *sPtr = elements (data) + offset;
|
|
register jchar *dPtr = JvGetStringChars(result);
|
|
while (--count >= 0)
|
|
*dPtr++ = *sPtr++;
|
|
return result;
|
|
}
|
|
|
|
jstring
|
|
java::lang::String::valueOf(jchar c)
|
|
{
|
|
register jstring result = JvAllocString(1);
|
|
JvGetStringChars (result)[0] = c;
|
|
return result;
|
|
}
|