gcc/libjava/java/lang/natString.cc

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// natString.cc - Implementation of java.lang.String native methods.
/* Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation
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This file is part of libgcj.
This software is copyrighted work licensed under the terms of the
Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
details. */
#include <config.h>
#include <string.h>
#include <stdlib.h>
#include <gcj/cni.h>
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#include <java/lang/Character.h>
#include <java/lang/String.h>
#include <java/lang/IndexOutOfBoundsException.h>
#include <java/lang/ArrayIndexOutOfBoundsException.h>
#include <java/lang/StringIndexOutOfBoundsException.h>
#include <java/lang/NullPointerException.h>
#include <java/io/ByteArrayOutputStream.h>
#include <java/io/OutputStreamWriter.h>
#include <java/io/ByteArrayInputStream.h>
#include <java/io/InputStreamReader.h>
#include <java/util/Locale.h>
#include <gnu/gcj/convert/UnicodeToBytes.h>
#include <gnu/gcj/convert/BytesToUnicode.h>
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#include <jvm.h>
static void unintern (jobject);
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static jstring* strhash = NULL;
static int strhash_count = 0; /* Number of slots used in strhash. */
static int strhash_size = 0; /* Number of slots available in strhash.
* Assumed be power of 2! */
// Some defines used by toUpperCase / toLowerCase.
#define ESSET 0x00df
#define CAPITAL_S 0x0053
#define SMALL_I 0x0069
#define CAPITAL_I_WITH_DOT 0x0130
#define SMALL_DOTLESS_I 0x0131
#define CAPITAL_I 0x0049
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#define DELETED_STRING ((jstring)(~0))
#define SET_STRING_IS_INTERNED(STR) /* nothing */
#define UNMASK_PTR(Ptr) (((unsigned long) (Ptr)) & ~0x01)
#define MASK_PTR(Ptr) (((unsigned long) (Ptr)) | 0x01)
#define PTR_MASKED(Ptr) (((unsigned long) (Ptr)) & 0x01)
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/* Find a slot where the string with elements DATA, length LEN,
and hash HASH should go in the strhash table of interned strings. */
jstring*
_Jv_StringFindSlot (jchar* data, jint len, jint hash)
{
JvSynchronize sync (&StringClass);
int start_index = hash & (strhash_size - 1);
int deleted_index = -1;
int index = start_index;
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/* step must be non-zero, and relatively prime with strhash_size. */
int step = 8 * hash + 7;
for (;;)
{
jstring* ptr = &strhash[index];
jstring value = (jstring) UNMASK_PTR (*ptr);
if (value == NULL)
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{
if (deleted_index >= 0)
return (&strhash[deleted_index]);
else
return ptr;
}
else if (*ptr == DELETED_STRING)
deleted_index = index;
else if (value->length() == len
&& memcmp(JvGetStringChars(value), data, 2*len) == 0)
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return (ptr);
index = (index + step) & (strhash_size - 1);
JvAssert (index != start_index);
}
}
/* Calculate a hash code for the string starting at PTR at given LENGTH.
This uses the same formula as specified for java.lang.String.hash. */
static jint
hashChars (jchar* ptr, jint length)
{
jchar* limit = ptr + length;
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jint hash = 0;
// Updated specification from
// http://www.javasoft.com/docs/books/jls/clarify.html.
while (ptr < limit)
hash = (31 * hash) + *ptr++;
return hash;
}
jint
java::lang::String::hashCode()
{
return hashChars(JvGetStringChars(this), length());
}
jstring*
_Jv_StringGetSlot (jstring str)
{
jchar* data = JvGetStringChars(str);
int length = str->length();
return _Jv_StringFindSlot(data, length, hashChars (data, length));
}
void
java::lang::String::rehash()
{
JvSynchronize sync (&StringClass);
if (strhash == NULL)
{
strhash_size = 1024;
strhash = (jstring *) _Jv_AllocBytesChecked (strhash_size
* sizeof (jstring));
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memset (strhash, 0, strhash_size * sizeof (jstring));
}
else
{
int i = strhash_size;
jstring* ptr = strhash + i;
int nsize = strhash_size * 2;
jstring *next = (jstring *) _Jv_AllocBytesChecked (nsize
* sizeof (jstring));
memset (next, 0, nsize * sizeof (jstring));
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while (--i >= 0)
{
--ptr;
if (*ptr == NULL || *ptr == DELETED_STRING)
continue;
/* This is faster equivalent of
* *__JvGetInternSlot(*ptr) = *ptr; */
jstring val = (jstring) UNMASK_PTR (*ptr);
jint hash = val->hashCode();
jint index = hash & (nsize - 1);
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jint step = 8 * hash + 7;
for (;;)
{
if (next[index] == NULL)
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{
next[index] = *ptr;
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break;
}
index = (index + step) & (nsize - 1);
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}
}
strhash_size = nsize;
strhash = next;
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}
}
jstring
java::lang::String::intern()
{
JvSynchronize sync (&StringClass);
if (4 * strhash_count >= 3 * strhash_size)
rehash();
jstring* ptr = _Jv_StringGetSlot(this);
if (*ptr != NULL && *ptr != DELETED_STRING)
{
// See description in unintern() to understand this.
*ptr = (jstring) MASK_PTR (*ptr);
return (jstring) UNMASK_PTR (*ptr);
}
jstring str = this->data == this ? this
: _Jv_NewString(JvGetStringChars(this), this->length());
SET_STRING_IS_INTERNED(str);
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strhash_count++;
*ptr = str;
// When string is GC'd, clear the slot in the hash table.
_Jv_RegisterFinalizer ((void *) str, unintern);
return str;
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}
/* Called by String fake finalizer. */
static void
unintern (jobject obj)
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{
JvSynchronize sync (&StringClass);
jstring str = reinterpret_cast<jstring> (obj);
jstring* ptr = _Jv_StringGetSlot(str);
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if (*ptr == NULL || *ptr == DELETED_STRING)
return;
// We assume the lowest bit of the pointer is free for our nefarious
// manipulations. What we do is set it to `0' (implicitly) when
// interning the String. If we subsequently re-intern the same
// String, then we set the bit. When finalizing, if the bit is set
// then we clear it and re-register the finalizer. We know this is
// a safe approach because both the intern() and unintern() acquire
// the class lock; this bit can't be manipulated when the lock is
// not held. So if we are finalizing and the bit is clear then we
// know all references are gone and we can clear the entry in the
// hash table. The naive approach of simply clearing the pointer
// here fails in the case where a request to intern a new string
// with the same contents is made between the time the intern()d
// string is found to be unreachable and when the finalizer is
// actually run. In this case we could clear a pointer to a valid
// string, and future intern() calls for that particular value would
// spuriously fail.
if (PTR_MASKED (*ptr))
{
*ptr = (jstring) UNMASK_PTR (*ptr);
_Jv_RegisterFinalizer ((void *) obj, unintern);
}
else
{
*ptr = DELETED_STRING;
strhash_count--;
}
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}
jstring
_Jv_NewStringUTF (const char *bytes)
{
int size = strlen (bytes);
unsigned char *p = (unsigned char *) bytes;
int length = _Jv_strLengthUtf8 ((char *) p, size);
if (length < 0)
return NULL;
jstring jstr = JvAllocString (length);
jchar *chrs = JvGetStringChars (jstr);
p = (unsigned char *) bytes;
unsigned char *limit = p + size;
while (p < limit)
*chrs++ = UTF8_GET (p, limit);
return jstr;
}
jstring
_Jv_NewStringUtf8Const (Utf8Const* str)
{
jchar *chrs;
jchar buffer[100];
jstring jstr;
unsigned char* data = (unsigned char*) str->data;
unsigned char* limit = data + str->length;
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int length = _Jv_strLengthUtf8(str->data, str->length);
if (length <= (int) (sizeof(buffer) / sizeof(jchar)))
{
jstr = NULL;
chrs = buffer;
}
else
{
jstr = JvAllocString(length);
chrs = JvGetStringChars(jstr);
}
while (data < limit)
*chrs++ = UTF8_GET(data, limit);
chrs -= length;
JvSynchronize sync (&StringClass);
if (4 * strhash_count >= 3 * strhash_size)
java::lang::String::rehash();
int hash = str->hash;
jstring* ptr = _Jv_StringFindSlot (chrs, length, hash);
if (*ptr != NULL && *ptr != DELETED_STRING)
return (jstring) UNMASK_PTR (*ptr);
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strhash_count++;
if (jstr == NULL)
{
jstr = JvAllocString(length);
chrs = JvGetStringChars(jstr);
memcpy (chrs, buffer, sizeof(jchar)*length);
}
*ptr = jstr;
SET_STRING_IS_INTERNED(jstr);
return jstr;
}
jsize
_Jv_GetStringUTFLength (jstring string)
{
jsize len = 0;
jchar *ptr = JvGetStringChars (string);
jsize i = string->length();
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while (--i >= 0)
{
jchar ch = *ptr++;
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if (ch > 0 && ch <= 0x7F)
len += 1;
else if (ch <= 0x7FF)
len += 2;
else
len += 3;
}
return len;
}
// Not sure this quite matches GetStringUTFRegion.
// null-termination of result? len? throw exception?
jsize
_Jv_GetStringUTFRegion (jstring str, jsize start, jsize len, char *buf)
{
jchar *sptr = JvGetStringChars (str) + start;
jsize i = len;
char *dptr = buf;
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while (--i >= 0)
{
jchar ch = *sptr++;
if (ch > 0 && ch <= 0x7F)
*dptr++ = (char) ch;
else if (ch <= 0x7FF)
{
*dptr++ = (char) (0xC0 + ((ch >> 6) & 0x1F));
*dptr++ = (char) (0x80 + (ch & 0x3F));
}
else
{
*dptr++ = (char) (0xE0 + ((ch >> 12) & 0xF));
*dptr++ = (char) (0x80 + ((ch >> 6) & 0x3F));
*dptr++ = (char) (0x80 + (ch & 0x3F));
}
}
return dptr - buf;
}
jstring
_Jv_AllocString(jsize len)
{
jsize sz = sizeof(java::lang::String) + len * sizeof(jchar);
jstring obj = (jstring) JvAllocObject(&StringClass, sz);
obj->data = obj;
obj->boffset = sizeof(java::lang::String);
obj->count = len;
return obj;
}
jstring
_Jv_NewString(const jchar *chars, jsize len)
{
jstring str = _Jv_AllocString(len);
jchar* data = JvGetStringChars (str);
while (--len >= 0)
*data++ = *chars++;
return str;
}
jstring
_Jv_NewStringLatin1(const char *bytes, jsize len)
{
jstring str = JvAllocString(len);
jchar* data = JvGetStringChars (str);
while (--len >= 0)
*data++ = *(unsigned char*)bytes++;
return str;
}
void
java::lang::String::init ()
{
count = 0;
boffset = sizeof(java::lang::String);
data = this;
}
void
java::lang::String::init(jcharArray chars, jint offset, jint count,
jboolean dont_copy)
{
if (! chars)
throw new NullPointerException;
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jsize data_size = JvGetArrayLength (chars);
if (offset < 0 || count < 0 || offset + count < 0
|| offset + count > data_size)
throw new StringIndexOutOfBoundsException;
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jcharArray array;
jchar *pdst;
if (! dont_copy)
{
array = JvNewCharArray(count);
pdst = elements (array);
memcpy (pdst, elements (chars) + offset, count * sizeof (jchar));
}
else
{
JvAssert (offset == 0);
array = chars;
pdst = elements (array);
}
data = array;
boffset = (char *) pdst - (char *) array;
this->count = count;
}
void
java::lang::String::init(jbyteArray ascii, jint hibyte, jint offset,
jint count)
{
if (! ascii)
throw new NullPointerException;
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jsize data_size = JvGetArrayLength (ascii);
if (offset < 0 || count < 0 || offset + count < 0
|| offset + count > data_size)
throw new java::lang::StringIndexOutOfBoundsException;
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jcharArray array = JvNewCharArray(count);
jbyte *psrc = elements (ascii) + offset;
jchar *pdst = elements (array);
data = array;
boffset = (char *) pdst - (char *) array;
this->count = count;
hibyte = (hibyte & 0xff) << 8;
while (-- count >= 0)
{
*pdst++ = hibyte | (*psrc++ & 0xff);
}
}
void
java::lang::String::init (jbyteArray bytes, jint offset, jint count,
jstring encoding)
{
if (! bytes)
throw new NullPointerException;
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jsize data_size = JvGetArrayLength (bytes);
if (offset < 0 || count < 0 || offset + count < 0
|| offset + count > data_size)
throw new StringIndexOutOfBoundsException;
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jcharArray array = JvNewCharArray (count);
gnu::gcj::convert::BytesToUnicode *converter
= gnu::gcj::convert::BytesToUnicode::getDecoder(encoding);
jint outpos = 0;
int avail = count;
converter->setInput(bytes, offset, offset+count);
while (converter->inpos < converter->inlength)
{
int done = converter->read(array, outpos, avail);
if (done == 0)
{
jint new_size = 2 * (outpos + avail);
jcharArray new_array = JvNewCharArray (new_size);
memcpy (elements (new_array), elements (array),
outpos * sizeof(jchar));
array = new_array;
avail = new_size - outpos;
}
else
{
outpos += done;
avail -= done;
}
}
this->data = array;
this->boffset = (char *) elements (array) - (char *) array;
this->count = outpos;
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}
jboolean
java::lang::String::equals(jobject anObject)
{
if (anObject == NULL)
return false;
if (anObject == this)
return true;
if (anObject->getClass() != &StringClass)
return false;
jstring other = (jstring) anObject;
if (count != other->count)
return false;
/* if both are interned, return false. */
jint i = count;
jchar *xptr = JvGetStringChars (this);
jchar *yptr = JvGetStringChars (other);
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while (--i >= 0)
{
if (*xptr++ != *yptr++)
return false;
}
return true;
}
jchar
java::lang::String::charAt(jint i)
{
if (i < 0 || i >= count)
throw new java::lang::StringIndexOutOfBoundsException;
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return JvGetStringChars(this)[i];
}
void
java::lang::String::getChars(jint srcBegin, jint srcEnd,
jcharArray dst, jint dstBegin)
{
jint dst_length = JvGetArrayLength (dst);
if (srcBegin < 0 || srcBegin > srcEnd || srcEnd > count
|| dstBegin < 0 || dstBegin + (srcEnd-srcBegin) > dst_length)
throw new java::lang::StringIndexOutOfBoundsException;
jchar *dPtr = elements (dst) + dstBegin;
jchar *sPtr = JvGetStringChars (this) + srcBegin;
jint i = srcEnd-srcBegin;
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while (--i >= 0)
*dPtr++ = *sPtr++;
}
jbyteArray
java::lang::String::getBytes (jstring enc)
{
jint todo = length();
jint buflen = todo;
jbyteArray buffer = JvNewByteArray(todo);
jint bufpos = 0;
jint offset = 0;
gnu::gcj::convert::UnicodeToBytes *converter
= gnu::gcj::convert::UnicodeToBytes::getEncoder(enc);
while (todo > 0)
{
converter->setOutput(buffer, bufpos);
int converted = converter->write(this, offset, todo, NULL);
bufpos = converter->count;
if (converted == 0)
{
buflen *= 2;
jbyteArray newbuffer = JvNewByteArray(buflen);
memcpy (elements (newbuffer), elements (buffer), bufpos);
buffer = newbuffer;
}
else
{
offset += converted;
todo -= converted;
}
}
if (bufpos == buflen)
return buffer;
jbyteArray result = JvNewByteArray(bufpos);
memcpy (elements (result), elements (buffer), bufpos);
return result;
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}
void
java::lang::String::getBytes(jint srcBegin, jint srcEnd,
jbyteArray dst, jint dstBegin)
{
jint dst_length = JvGetArrayLength (dst);
if (srcBegin < 0 || srcBegin > srcEnd || srcEnd > count
|| dstBegin < 0 || dstBegin + (srcEnd-srcBegin) > dst_length)
throw new java::lang::StringIndexOutOfBoundsException;
jbyte *dPtr = elements (dst) + dstBegin;
jchar *sPtr = JvGetStringChars (this) + srcBegin;
jint i = srcEnd-srcBegin;
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while (--i >= 0)
*dPtr++ = (jbyte) *sPtr++;
}
jcharArray
java::lang::String::toCharArray()
{
jcharArray array = JvNewCharArray(count);
jchar *dPtr = elements (array);
jchar *sPtr = JvGetStringChars (this);
jint i = count;
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while (--i >= 0)
*dPtr++ = *sPtr++;
return array;
}
jboolean
java::lang::String::equalsIgnoreCase (jstring anotherString)
{
if (anotherString == NULL || count != anotherString->count)
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return false;
jchar *tptr = JvGetStringChars (this);
jchar *optr = JvGetStringChars (anotherString);
jint i = count;
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while (--i >= 0)
{
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;
jchar *tptr = JvGetStringChars (this) + toffset;
jchar *optr = JvGetStringChars (other) + ooffset;
jint i = len;
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while (--i >= 0)
{
if (*tptr++ != *optr++)
return false;
}
return true;
}
jint
java::lang::String::compareTo (jstring anotherString)
{
jchar *tptr = JvGetStringChars (this);
jchar *optr = JvGetStringChars (anotherString);
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jint tlen = this->count;
jint olen = anotherString->count;
jint i = tlen > olen ? olen : tlen;
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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;
jchar *tptr = JvGetStringChars (this) + toffset;
jchar *optr = JvGetStringChars (other) + ooffset;
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;
}
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return true;
}
jboolean
java::lang::String::startsWith (jstring prefix, jint toffset)
{
jint i = prefix->count;
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if (toffset < 0 || toffset + i > count)
return false;
jchar *xptr = JvGetStringChars (this) + toffset;
jchar *yptr = JvGetStringChars (prefix);
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while (--i >= 0)
{
if (*xptr++ != *yptr++)
return false;
}
return true;
}
jint
java::lang::String::indexOf (jint ch, jint fromIndex)
{
if (fromIndex < 0)
fromIndex = 0;
jchar *ptr = JvGetStringChars(this);
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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;
jchar *ptr = JvGetStringChars(this);
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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)
throw new StringIndexOutOfBoundsException;
if (beginIndex == 0 && endIndex == count)
return this;
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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);
jchar *dstPtr = JvGetStringChars(result);
jchar *srcPtr = JvGetStringChars(this);
jint i = count;
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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 (java::util::Locale *locale)
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{
jint i;
jchar* chrs = JvGetStringChars(this);
jchar ch = 0;
bool handle_tr = false;
if (locale != NULL)
{
String *lang = locale->getLanguage ();
if (lang->length () == 2
&& lang->charAt (0) == 't'
&& lang->charAt (1) == 'r')
handle_tr = true;
}
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for (i = 0; ; i++)
{
if (i == count)
return this;
jchar origChar = chrs[i];
if (handle_tr && (origChar == CAPITAL_I
|| origChar == CAPITAL_I_WITH_DOT))
break;
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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++)
{
if (handle_tr && chrs[i] == CAPITAL_I)
*dPtr++ = SMALL_DOTLESS_I;
else if (handle_tr && chrs[i] == CAPITAL_I_WITH_DOT)
*dPtr++ = SMALL_I;
else
*dPtr++ = java::lang::Character::toLowerCase(chrs[i]);
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}
return result;
}
jstring
java::lang::String::toUpperCase (java::util::Locale *locale)
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{
jint i;
jchar* chrs = JvGetStringChars(this);
jchar ch;
// When handling a specific locale there might be special rules.
// Currently all existing rules are simply handled inline, as there
// are only two and they are documented in the online 1.2 docs.
bool handle_esset = locale != NULL;
bool handle_tr = false;
if (locale != NULL)
{
String *lang = locale->getLanguage ();
if (lang->length () == 2
&& lang->charAt (0) == 't'
&& lang->charAt (1) == 'r')
handle_tr = true;
}
int new_count = count;
bool new_string = false;
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for (i = 0; ; i++)
{
if (i == count)
break;
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jchar origChar = chrs[i];
if (handle_esset && origChar == ESSET)
{
++new_count;
new_string = true;
}
else if (handle_tr && (origChar == SMALL_I
|| origChar == SMALL_DOTLESS_I))
new_string = true;
else
{
ch = java::lang::Character::toUpperCase(origChar);
if (ch != origChar)
new_string = true;
}
if (new_string && ! handle_esset)
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break;
}
if (! new_string)
return this;
jstring result = JvAllocString(new_count);
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jchar *dPtr = JvGetStringChars (result);
for (i = 0; i < count; i++)
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{
if (handle_esset && chrs[i] == ESSET)
{
*dPtr++ = CAPITAL_S;
*dPtr++ = CAPITAL_S;
}
else if (handle_tr && chrs[i] == SMALL_I)
*dPtr++ = CAPITAL_I_WITH_DOT;
else if (handle_tr && chrs[i] == SMALL_DOTLESS_I)
*dPtr++ = CAPITAL_I;
else
*dPtr++ = java::lang::Character::toUpperCase(chrs[i]);
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}
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)
throw new java::lang::IndexOutOfBoundsException;
jstring result = JvAllocString(count);
jchar *sPtr = elements (data) + offset;
jchar *dPtr = JvGetStringChars(result);
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while (--count >= 0)
*dPtr++ = *sPtr++;
return result;
}
jstring
java::lang::String::valueOf(jchar c)
{
jstring result = JvAllocString(1);
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JvGetStringChars (result)[0] = c;
return result;
}