eingebunden, und ebenso alle C-Funktionen, mit denen diese
Methoden implementiert werden.
- Authors: Reinhard Grafl EMAIL: cacao@complang.tuwien.ac.at
+ Authors: Reinhard Grafl EMAIL: cacao@complang.tuwien.ac.at
Last Change: 1996/11/14
#include <unistd.h>
#include <time.h>
-
#include "global.h"
#include "native.h"
-
-#include "builtin.h"
#include "nativetypes.hh"
+#include "builtin.h"
#include "asmpart.h"
#include "tables.h"
#include "loader.h"
+#include <math.h>
+#include <string.h>
+#include <assert.h>
+#include <sys/time.h>
+#include "../threads/thread.h" /* schani */
+#include "../threads/locks.h"
-java_objectheader* exceptionptr = NULL;
+/* INCLUDE-Files fuer IO-Funktionen */
+#include <fcntl.h>
+#include <dirent.h>
+#include <sys/types.h>
+#ifdef _OSF_SOURCE
+#include <sys/mode.h>
+#endif
+#include <sys/stat.h>
+#include "../threads/threadio.h"
+/* searchpath for classfiles */
static char *classpath;
+/* for java-string to char conversion */
+#define MAXSTRINGSIZE 1000
-/******************** die f"r die native-Methoden n"otigen Systemklassen *****/
+/******************** systemclasses required for native methods *****/
static classinfo *class_java_lang_Class;
static classinfo *class_java_lang_Cloneable;
static classinfo *class_java_lang_CloneNotSupportedException;
-static classinfo *class_java_lang_Double;
-static classinfo *class_java_lang_Float;
-static classinfo *class_java_io_IOException;
+static classinfo *class_java_lang_System;
+static classinfo *class_java_lang_ClassLoader;
static classinfo *class_java_lang_ClassNotFoundException;
static classinfo *class_java_lang_InstantiationException;
+static classinfo *class_java_lang_NoSuchMethodError;
+static classinfo *class_java_lang_NoSuchFieldError;
+static classinfo *class_java_lang_ClassFormatError;
+static classinfo *class_java_lang_IllegalArgumentException;
+static classinfo *class_java_lang_ArrayIndexOutOfBoundsException;
+static classinfo *class_java_lang_NoSuchFieldException;
+static classinfo *class_java_io_SyncFailedException;
+static classinfo *class_java_io_IOException;
+static classinfo *class_java_io_UnixFileSystem;
+static classinfo *class_java_security_PrivilegedActionException;
+static classinfo *class_java_lang_NoSuchMethodException;
+static classinfo *class_java_lang_Double;
+static classinfo *class_java_lang_Float;
+static classinfo *class_java_lang_Long;
+static classinfo *class_java_lang_Byte;
+static classinfo *class_java_lang_Short;
+static classinfo *class_java_lang_Boolean;
+static classinfo *class_java_lang_Void;
+static classinfo *class_java_lang_Character;
+static classinfo *class_java_lang_Integer;
+
+/* the system classloader object */
+struct java_lang_ClassLoader *SystemClassLoader = NULL;
+
+/* for raising exceptions from native methods */
+java_objectheader* exceptionptr = NULL;
+/************* use classinfo structure as java.lang.Class object *************/
+static void use_class_as_object (classinfo *c)
+{
+ c->header.vftbl = class_java_lang_Class -> vftbl;
+}
-/************************** alle Funktionen einbinden ************************/
-
-#include "nat/lang.c"
-#include "nat/io.c"
-#include "nat/util.c"
-
-
-/********************** Tabellen f"ur die Methoden ***************************/
-
+/*********************** include Java Native Interface ***********************/
+
+#include "jni.c"
+
+/*************************** include native methods **************************/
+
+#include "nat/Object.c"
+#include "nat/String.c"
+#include "nat/ClassLoader.c"
+#include "nat/Class.c"
+#include "nat/Compiler.c"
+#include "nat/Double.c"
+#include "nat/Float.c"
+#include "nat/Math.c"
+#include "nat/Package.c"
+#include "nat/Runtime.c"
+#include "nat/SecurityManager.c"
+#include "nat/System.c"
+#include "nat/Thread.c"
+#include "nat/Throwable.c"
+#include "nat/Finalizer.c"
+#include "nat/Array.c"
+#include "nat/Constructor.c"
+#include "nat/Field.c"
+#include "nat/Method.c"
+#include "nat/FileDescriptor.c"
+#include "nat/FileInputStream.c"
+#include "nat/FileOutputStream.c"
+#include "nat/FileSystem.c"
+#include "nat/ObjectInputStream.c"
+#include "nat/ObjectStreamClass.c"
+#include "nat/RandomAccessFile.c"
+#include "nat/ResourceBundle.c"
+#include "nat/JarFile.c"
+#include "nat/Adler32.c"
+#include "nat/CRC32.c"
+#include "nat/Deflater.c"
+#include "nat/Inflater.c"
+#include "nat/ZipEntry.c"
+#include "nat/ZipFile.c"
+#include "nat/BigInteger.c"
+#include "nat/InetAddress.c"
+#include "nat/InetAddressImpl.c"
+#include "nat/AccessController.c"
+#include "nat/ClassLoader_NativeLibrary.c"
+#include "nat/UnixFileSystem.c"
+
+/************************** tables for methods *******************************/
+
+/* table for locating native methods */
static struct nativeref {
char *classname;
char *methodname;
#define NATIVETABLESIZE (sizeof(nativetable)/sizeof(struct nativeref))
+/* table for fast string comparison */
static struct nativecompref {
- unicode *classname;
- unicode *methodname;
- unicode *descriptor;
+ utf *classname;
+ utf *methodname;
+ utf *descriptor;
bool isstatic;
functionptr func;
} nativecomptable [NATIVETABLESIZE];
+/* string comparsion table initialized */
static bool nativecompdone = false;
-/*********************** Funktion: native_loadclasses **************************
+/*********************** function: native_loadclasses ************************
- L"adt alle Klassen, die die native Methoden zus"atzlich ben"otigen
+ load classes required for native methods
-*******************************************************************************/
+******************************************************************************/
void native_loadclasses()
{
+ /* class_new adds the class to the list of classes to be loaded */
class_java_lang_Cloneable =
- loader_load ( unicode_new_char ("java/lang/Cloneable") );
+ class_new ( utf_new_char ("java/lang/Cloneable") );
class_java_lang_CloneNotSupportedException =
- loader_load ( unicode_new_char ("java/lang/CloneNotSupportedException") );
+ class_new ( utf_new_char ("java/lang/CloneNotSupportedException") );
class_java_lang_Class =
- loader_load ( unicode_new_char ("java/lang/Class") );
- class_java_lang_Double =
- loader_load ( unicode_new_char ("java/lang/Double") );
- class_java_lang_Float =
- loader_load ( unicode_new_char ("java/lang/Float") );
+ class_new ( utf_new_char ("java/lang/Class") );
class_java_io_IOException =
- loader_load ( unicode_new_char ("java/io/IOException") );
+ class_new ( utf_new_char ("java/io/IOException") );
class_java_lang_ClassNotFoundException =
- loader_load ( unicode_new_char ("java/lang/ClassNotFoundException") );
- class_java_lang_InstantiationException=
- loader_load ( unicode_new_char ("java/lang/InstantiationException") );
+ class_new ( utf_new_char ("java/lang/ClassNotFoundException") );
+ class_java_lang_InstantiationException =
+ class_new ( utf_new_char ("java/lang/InstantiationException") );
+ class_java_lang_NoSuchMethodError =
+ class_new ( utf_new_char ("java/lang/NoSuchMethodError") );
+ class_java_lang_NoSuchFieldError =
+ class_new ( utf_new_char ("java/lang/NoSuchFieldError") );
+ class_java_lang_ClassFormatError =
+ class_new ( utf_new_char ("java/lang/ClassFormatError") );
+ class_java_io_SyncFailedException =
+ class_new ( utf_new_char ("java/io/SyncFailedException") );
+ class_java_io_UnixFileSystem =
+ class_new ( utf_new_char ("java/io/UnixFileSystem") );
+ class_java_lang_System =
+ class_new ( utf_new_char ("java/lang/System") );
+ class_java_lang_ClassLoader =
+ class_new ( utf_new_char ("java/lang/ClassLoader") );
+ class_java_security_PrivilegedActionException =
+ class_new( utf_new_char("java/security/PrivilegedActionException"));
+ class_java_lang_IllegalArgumentException =
+ class_new( utf_new_char("java/lang/IllegalArgumentException"));
+ class_java_lang_ArrayIndexOutOfBoundsException =
+ class_new( utf_new_char ("java/lang/ArrayIndexOutOfBoundsException") );
+ class_java_lang_NoSuchFieldException =
+ class_new( utf_new_char ("java/lang/NoSuchFieldException") );
+ class_java_lang_NoSuchMethodException =
+ class_new( utf_new_char ("java/lang/NoSuchMethodException") );
+
+ /* load classes for wrapping primitive types */
+ class_java_lang_Double =
+ class_new( utf_new_char ("java/lang/Double") );
+ class_java_lang_Float =
+ class_new( utf_new_char ("java/lang/Float") );
+ class_java_lang_Character =
+ class_new( utf_new_char ("java/lang/Character") );
+ class_java_lang_Integer =
+ class_new( utf_new_char ("java/lang/Integer") );
+ class_java_lang_Long =
+ class_new( utf_new_char ("java/lang/Long") );
+ class_java_lang_Byte =
+ class_new( utf_new_char ("java/lang/Byte") );
+ class_java_lang_Short =
+ class_new( utf_new_char ("java/lang/Short") );
+ class_java_lang_Boolean =
+ class_new( utf_new_char ("java/lang/Boolean") );
+ class_java_lang_Void =
+ class_new( utf_new_char ("java/lang/Void") );
+
+ /* load to avoid dynamic classloading */
+ class_new(utf_new_char("sun/net/www/protocol/file/Handler"));
+ class_new(utf_new_char("sun/net/www/protocol/jar/Handler"));
+ class_new(utf_new_char("sun/io/CharToByteISO8859_1"));
+ /* start classloader */
+ loader_load(utf_new_char("sun/io/ByteToCharISO8859_1"));
}
-/********************* Funktion: native_setclasspath ***************************/
+
+/*************** adds a class to the vector of loaded classes ****************/
+
+void systemclassloader_addclass(classinfo *c)
+{
+ methodinfo *m;
+
+ /* find method addClass of java.lang.ClassLoader */
+ m = class_resolvemethod (
+ class_java_lang_ClassLoader,
+ utf_new_char("addClass"),
+ utf_new_char("(Ljava/lang/Class;)")
+ );
+
+ if (!m) panic("warning: cannot initialize classloader");
+
+ /* prepare class to be passed as argument */
+ use_class_as_object (c);
+
+ /* call 'addClass' */
+ asm_calljavamethod(m,
+ (java_objectheader*) SystemClassLoader,
+ (java_objectheader*) c,
+ NULL,
+ NULL
+ );
+}
+
+/*************** adds a library to the vector of loaded libraries ************/
+
+void systemclassloader_addlibrary(java_objectheader *o)
+{
+ methodinfo *m;
+
+ /* find method addElement of java.util.Vector */
+ m = class_resolvemethod (
+ loader_load ( utf_new_char ("java/util/Vector") ),
+ utf_new_char("addElement"),
+ utf_new_char("(Ljava/lang/Object;)V")
+ );
+
+ if (!m) panic("cannot initialize classloader");
+
+ /* call 'addElement' */
+ asm_calljavamethod(m,
+ SystemClassLoader->nativeLibraries,
+ o,
+ NULL,
+ NULL
+ );
+}
+
+/*****************************************************************************
+
+ create systemclassloader object and initialize instance fields
+
+******************************************************************************/
+
+void init_systemclassloader()
+{
+ if (!SystemClassLoader) {
+
+ /* create object and call initializer */
+ SystemClassLoader = (java_lang_ClassLoader*) native_new_and_init(class_java_lang_ClassLoader);
+
+ /* systemclassloader has no parent */
+ SystemClassLoader->parent = NULL;
+ SystemClassLoader->initialized = true;
+ }
+}
+
+
+/********************* add loaded library name ******************************/
+
+void systemclassloader_addlibname(java_objectheader *o)
+{
+ methodinfo *m;
+ java_objectheader *LibraryNameVector;
+ jfieldID id;
+
+ m = class_resolvemethod (
+ loader_load ( utf_new_char ("java/util/Vector") ),
+ utf_new_char("addElement"),
+ utf_new_char("(Ljava/lang/Object;)V")
+ );
+
+ if (!m) panic("cannot initialize classloader");
+
+ id = env.GetStaticFieldID(&env,class_java_lang_ClassLoader,"loadedLibraryNames","Ljava/util/Vector;");
+ if (!id) panic("can not access ClassLoader");
+
+ asm_calljavamethod(m,
+ GetStaticObjectField(&env,class_java_lang_ClassLoader,id),
+ o,
+ NULL,
+ NULL
+ );
+}
+
+
+/********************* function: native_setclasspath *************************/
void native_setclasspath (char *path)
{
+ /* set searchpath for classfiles */
classpath = path;
}
+/***************** function: throw_classnotfoundexception ********************/
+
+void throw_classnotfoundexception()
+{
+ /* throws a ClassNotFoundException */
+ exceptionptr = native_new_and_init (class_java_lang_ClassNotFoundException);
+}
+
/*********************** Funktion: native_findfunction ************************
*******************************************************************************/
-functionptr native_findfunction (unicode *cname, unicode *mname,
- unicode *desc, bool isstatic)
+functionptr native_findfunction (utf *cname, utf *mname,
+ utf *desc, bool isstatic)
{
u4 i;
+ /* entry of table for fast string comparison */
struct nativecompref *n;
+ /* for warning message if no function is found */
+ char *buffer;
+ int buffer_len,pos;
isstatic = isstatic ? true : false;
if (!nativecompdone) {
for (i=0; i<NATIVETABLESIZE; i++) {
nativecomptable[i].classname =
- unicode_new_char(nativetable[i].classname);
+ utf_new_char(nativetable[i].classname);
nativecomptable[i].methodname =
- unicode_new_char(nativetable[i].methodname);
+ utf_new_char(nativetable[i].methodname);
nativecomptable[i].descriptor =
- unicode_new_char(nativetable[i].descriptor);
+ utf_new_char(nativetable[i].descriptor);
nativecomptable[i].isstatic =
nativetable[i].isstatic;
nativecomptable[i].func =
desc==n->descriptor && isstatic==n->isstatic) return n->func;
}
+ /* no function was found, display warning */
+
+ buffer_len =
+ utf_strlen(cname) + utf_strlen(mname) + utf_strlen(desc) + 64;
+
+ buffer = MNEW(char, buffer_len);
+
+ strcpy(buffer,"warning: native function ");
+ utf_sprint(buffer+strlen(buffer),mname);
+ strcpy(buffer+strlen(buffer),": ");
+ utf_sprint(buffer+strlen(buffer),desc);
+ strcpy(buffer+strlen(buffer)," not found in class ");
+ utf_sprint(buffer+strlen(buffer),cname);
+
+ log_text(buffer);
+
+ MFREE(buffer,char,buffer_len);
+
return NULL;
}
-/********************** Funktion: javastring_new *****************************
+/********************** function: javastring_new *****************************
- Legt ein neues Objekt vom Typ java/lang/String an, und tr"agt als Text
- das "ubergebene unicode-Symbol ein.
- Return: Zeiger auf den String, oder NULL (wenn Speicher aus)
+ creates a new object of type java/lang/String with the text of
+ the specified utf8-string
+
+ return: pointer to the string or NULL (no memory)
*****************************************************************************/
-java_objectheader *javastring_new (unicode *text)
+java_objectheader *javastring_new (utf *u)
{
- u4 i;
- java_lang_String *s;
+ char *utf_ptr = u->text; /* pointer to current unicode character in utf string */
+ u4 utflength = utf_strlen(u); /* length of utf-string if uncompressed */
+ java_lang_String *s; /* result-string */
java_chararray *a;
+ u4 i;
s = (java_lang_String*) builtin_new (class_java_lang_String);
- a = builtin_newarray_char (text->length);
+ a = builtin_newarray_char (utflength);
+ /* javastring or character-array could not be created */
if ( (!a) || (!s) ) return NULL;
- for (i=0; i<text->length; i++) a->data[i] = text->text[i];
- s -> value = a;
+ /* decompress utf-string */
+ for (i=0; i<utflength; i++) a->data[i] = utf_nextu2(&utf_ptr);
+
+ /* set fields of the javastring-object */
+ s -> value = a;
s -> offset = 0;
- s -> count = text->length;
+ s -> count = utflength;
return (java_objectheader*) s;
}
-
/********************** Funktion: javastring_new_char ************************
Legt ein neues Objekt vom Typ java/lang/String an, und tr"agt als Text
java_objectheader *javastring_new_char (char *text)
{
u4 i;
- u4 len = strlen(text);
- java_lang_String *s;
+ u4 len = strlen(text); /* length of the string */
+ java_lang_String *s; /* result-string */
java_chararray *a;
s = (java_lang_String*) builtin_new (class_java_lang_String);
a = builtin_newarray_char (len);
+ /* javastring or character-array could not be created */
if ( (!a) || (!s) ) return NULL;
+ /* copy text */
for (i=0; i<len; i++) a->data[i] = text[i];
+
+ /* set fields of the javastring-object */
s -> value = a;
s -> offset = 0;
s -> count = len;
***********************************************************************************/
-#define MAXSTRINGSIZE 1000
char stringbuffer[MAXSTRINGSIZE];
char *javastring_tochar (java_objectheader *so)
return stringbuffer;
}
+/****************** function class_findfield_approx ***************************
+
+ searches in 'classinfo'-structure for a field with the
+ specified name
+
+*******************************************************************************/
+
+fieldinfo *class_findfield_approx (classinfo *c, utf *name)
+{
+ s4 i;
+ for (i = 0; i < c->fieldscount; i++) {
+ /* compare field names */
+ if ((c->fields[i].name == name))
+ return &(c->fields[i]);
+ }
+
+ /* field was not found, raise exception */
+ exceptionptr = native_new_and_init(class_java_lang_NoSuchFieldException);
+ return NULL;
+}
+
/******************** Funktion: native_new_and_init *************************
java_objectheader *native_new_and_init (classinfo *c)
{
methodinfo *m;
- java_objectheader *o = builtin_new (c);
+ java_objectheader *o = builtin_new (c); /* create object */
if (!o) return NULL;
+ /* find initializer */
m = class_findmethod (c,
- unicode_new_char ("<init>"),
- unicode_new_char ("()V"));
+ utf_new_char ("<init>"),
+ utf_new_char ("()V"));
+
if (!m) {
+ /* initializer not ofund */
log_text ("warning: class has no instance-initializer:");
- unicode_sprint (logtext, c->name);
+ utf_sprint (logtext, c->name);
dolog();
return o;
}
+ /* call initializer */
asm_calljavamethod (m, o,NULL,NULL,NULL);
return o;
}
+/******************** function: stringtable_update ****************************
+
+ traverses the javastring hashtable and sets the vftbl-entries of
+ javastrings which were temporarily set to NULL, because
+ java.lang.Object was not yet loaded
+
+*******************************************************************************/
+
+void stringtable_update ()
+{
+ java_lang_String *js;
+ java_chararray *a;
+ literalstring *s; /* hashtable entry */
+ u4 i;
+
+ for (i=0; i<string_hash.size; i++) {
+ s = string_hash.ptr[i];
+ if (s) {
+ while (s) {
+
+ js = (java_lang_String *) s->string;
+
+ if (!js || !(a = js->value))
+ /* error in hashtable found */
+ panic("invalid literalstring in hashtable");
+
+ if (!js->header.vftbl)
+ /* vftbl of javastring is NULL */
+ js->header.vftbl = class_java_lang_String -> vftbl;
+
+ if (!a->header.objheader.vftbl)
+ /* vftbl of character-array is NULL */
+ a->header.objheader.vftbl = class_array -> vftbl;
+
+ /* follow link in external hash chain */
+ s = s->hashlink;
+ }
+ }
+ }
+}
+
-/********************* Funktion: literalstring_new ****************************
+/************************* function: u2_utflength ***************************
- erzeugt einen Java-String mit dem angegebenen Text, allerdings nicht
- auf dem HEAP, sondern in einem anderen Speicherbereich (der String
- muss dann sp"ater explizit wieder freigegeben werden).
- Alle Strings, die auf diese Art erzeugt werden, werden in einer
- gemeinsamen Struktur gespeichert (n"amlich auch "uber die
- Unicode-Hashtabelle), sodass identische Strings auch wirklich den
- gleichen Zeiger liefern.
+ returns the utf length in bytes of a u2 array
+
+*****************************************************************************/
+
+
+u4 u2_utflength(u2 *text, u4 u2_length)
+{
+ u4 result_len = 0; /* utf length in bytes */
+ u2 ch; /* current unicode character */
+ u4 len;
-******************************************************************************/
+ for (len = 0; len < u2_length; len++) {
+
+ /* next unicode character */
+ ch = *text++;
+
+ /* determine bytes required to store unicode character as utf */
+ if (ch && (ch < 0x80))
+ result_len++;
+ else if (ch < 0x800)
+ result_len += 2;
+ else
+ result_len += 3;
+ }
+
+ return result_len;
+}
+
+/********************* function: utf_new_u2 ***********************************
+
+ make utf symbol from u2 array,
+ if isclassname is true '.' is replaced by '/'
+
+*******************************************************************************/
-java_objectheader *literalstring_new (unicode *text)
+utf *utf_new_u2(u2 *unicode_pos, u4 unicode_length, bool isclassname)
{
- u4 i;
- java_lang_String *s;
- java_chararray *a;
+ char *buffer; /* memory buffer for unicode characters */
+ char *pos; /* pointer to current position in buffer */
+ u4 left; /* unicode characters left */
+ u4 buflength; /* utf length in bytes of the u2 array */
+ utf *result; /* resulting utf-string */
+ int i;
+
+ /* determine utf length in bytes and allocate memory */
+ buflength = u2_utflength(unicode_pos, unicode_length);
+ buffer = MNEW(char,buflength);
+
+ /* memory allocation failed */
+ if (!buffer) return NULL;
+
+ left = buflength;
+ pos = buffer;
+
+ for (i = 0; i++ < unicode_length; unicode_pos++) {
+ /* next unicode character */
+ u2 c = *unicode_pos;
+
+ if ((c != 0) && (c < 0x80)) {
+ /* 1 character */
+ left--;
+ if ((int) left < 0) break;
+ /* convert classname */
+ if (isclassname && c=='.')
+ *pos++ = '/';
+ else
+ *pos++ = (char) c;
+ } else if (c < 0x800) {
+ /* 2 characters */
+ unsigned char high = c >> 6;
+ unsigned char low = c & 0x3F;
+ left = left - 2;
+ if ((int) left < 0) break;
+ *pos++ = high | 0xC0;
+ *pos++ = low | 0x80;
+ } else {
+ /* 3 characters */
+ char low = c & 0x3f;
+ char mid = (c >> 6) & 0x3F;
+ char high = c >> 12;
+ left = left - 3;
+ if ((int) left < 0) break;
+ *pos++ = high | 0xE0;
+ *pos++ = mid | 0x80;
+ *pos++ = low | 0x80;
+ }
+ }
+
+ /* insert utf-string into symbol-table */
+ result = utf_new(buffer,buflength);
+ MFREE(buffer, char, buflength);
+ return result;
+}
+
+/********************* function: javastring_toutf *****************************
+
+ make utf symbol from javastring
- if (text->string) return text->string;
+*******************************************************************************/
+
+utf *javastring_toutf(java_lang_String *string, bool isclassname)
+{
+ java_lang_String *str = (java_lang_String *) string;
+ return utf_new_u2(str->value->data,str->count, isclassname);
+}
+
+/********************* function: literalstring_u2 *****************************
+
+ searches for the javastring with the specified u2-array in
+ the string hashtable, if there is no such string a new one is
+ created
+
+ if copymode is true a copy of the u2-array is made
+
+*******************************************************************************/
+
+java_objectheader *literalstring_u2 (java_chararray *a, u4 length, bool copymode )
+{
+ literalstring *s; /* hashtable element */
+ java_lang_String *js; /* u2-array wrapped in javastring */
+ java_chararray *stringdata; /* copy of u2-array */
+ u4 key;
+ u4 slot;
+ u2 i;
+
+ /* find location in hashtable */
+ key = unicode_hashkey (a->data, length);
+ slot = key & (string_hash.size-1);
+ s = string_hash.ptr[slot];
+
+ while (s) {
- a = lit_mem_alloc (sizeof(java_chararray) + sizeof(u2)*(text->length-1) );
- a -> header.objheader.vftbl = class_array -> vftbl;
- a -> header.size = text->length;
- a -> header.arraytype = ARRAYTYPE_CHAR;
- for (i=0; i<text->length; i++) a->data[i] = text->text[i];
-
- s = LNEW (java_lang_String);
- s -> header.vftbl = class_java_lang_String -> vftbl;
- s -> value = a;
- s -> offset = 0;
- s -> count = text->length;
+ js = (java_lang_String *) s->string;
+
+ if (js->count == length) {
+ /* compare text */
+ for (i=0; i<length; i++)
+ if (js->value->data[i] != a->data[i]) goto nomatch;
+
+ /* string already in hashtable, free memory */
+ if (!copymode)
+ lit_mem_free(a, sizeof(java_chararray) + sizeof(u2)*(length-1)+10);
+
+ return (java_objectheader *) js;
+ }
+
+ nomatch:
+ /* follow link in external hash chain */
+ s = s->hashlink;
+ }
+
+ if (copymode) {
+ /* create copy of u2-array for new javastring */
+ u4 arraysize = sizeof(java_chararray) + sizeof(u2)*(length-1)+10;
+ stringdata = lit_mem_alloc ( arraysize );
+ memcpy(stringdata, a, arraysize );
+ }
+ else
+ stringdata = a;
+
+ /* location in hashtable found, complete arrayheader */
+ if (class_array==NULL) panic("class_array not initialized");
+ stringdata -> header.objheader.vftbl = class_array -> vftbl;
+ stringdata -> header.size = length;
+ stringdata -> header.arraytype = ARRAYTYPE_CHAR;
+
+ /* create new javastring */
+ js = LNEW (java_lang_String);
+ js -> header.vftbl = class_java_lang_String -> vftbl;
+ js -> value = stringdata;
+ js -> offset = 0;
+ js -> count = length;
+
+ /* create new literalstring */
+ s = NEW (literalstring);
+ s->hashlink = string_hash.ptr[slot];
+ s->string = (java_objectheader *) js;
+ string_hash.ptr[slot] = s;
+
+ /* update numbe of hashtable entries */
+ string_hash.entries++;
+
+ /* reorganization of hashtable */
+ if ( string_hash.entries > (string_hash.size*2)) {
+
+ /* reorganization of hashtable, average length of
+ the external chains is approx. 2 */
+
+ u4 i;
+ literalstring *s;
+ hashtable newhash; /* the new hashtable */
+
+ /* create new hashtable, double the size */
+ init_hashtable(&newhash, string_hash.size*2);
+ newhash.entries=string_hash.entries;
+
+ /* transfer elements to new hashtable */
+ for (i=0; i<string_hash.size; i++) {
+ s = string_hash.ptr[i];
+ while (s) {
+ literalstring *nexts = s -> hashlink;
+ js = (java_lang_String*) s->string;
+ slot = (unicode_hashkey(js->value->data,js->count)) & (newhash.size-1);
+
+ s->hashlink = newhash.ptr[slot];
+ newhash.ptr[slot] = s;
+
+ /* follow link in external hash chain */
+ s = nexts;
+ }
+ }
+
+ /* dispose old table */
+ MFREE (string_hash.ptr, void*, string_hash.size);
+ string_hash = newhash;
+ }
+
+ return (java_objectheader *) js;
+}
- unicode_setstringlink (text, (java_objectheader*) s);
- return (java_objectheader*) s;
+/******************** Funktion: literalstring_new *****************************
+
+ creates a new javastring with the text of the utf-symbol
+ and inserts it into the string hashtable
+
+*******************************************************************************/
+
+java_objectheader *literalstring_new (utf *u)
+{
+ char *utf_ptr = u->text; /* pointer to current unicode character in utf string */
+ u4 utflength = utf_strlen(u); /* length of utf-string if uncompressed */
+ java_chararray *a; /* u2-array constructed from utf string */
+ java_objectheader *js;
+ u4 i;
+
+ /* allocate memory */
+ a = lit_mem_alloc (sizeof(java_chararray) + sizeof(u2)*(utflength-1)+10 );
+ /* convert utf-string to u2-array */
+ for (i=0; i<utflength; i++) a->data[i] = utf_nextu2(&utf_ptr);
+
+ return literalstring_u2(a, utflength, false);
}
-/********************** Funktion: literalstring_free **************************
+/********************** function: literalstring_free **************************
- L"oscht einen Java-String wieder aus dem Speicher (wird zu Systemende
- vom Hashtabellen-Verwalter aufgerufen)
+ removes a javastring from memory
******************************************************************************/
{
java_lang_String *s = (java_lang_String*) sobj;
java_chararray *a = s->value;
+
+ log_text("literalstring_free called");
+ /* dispose memory of java.lang.String object */
LFREE (s, java_lang_String);
- LFREE (a, sizeof(java_chararray) + sizeof(u2)*(a->header.size-1));
+ /* dispose memory of java-characterarray */
+ LFREE (a, sizeof(java_chararray) + sizeof(u2)*(a->header.size-1)); /* +10 ?? */
}
+
+
+
projects / cacao.git / blobdiff