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jritypes.h

/* -*- Mode: C; tab-width: 4; -*- */
/*******************************************************************************
 * Java Runtime Interface
 * Copyright (c) 1996 Netscape Communications Corporation. All rights reserved.
 ******************************************************************************/

#ifndef JRITYPES_H
#define JRITYPES_H

#include "jri_md.h"
#include <stddef.h>
#include <stdlib.h>
#include <stdarg.h>

#ifdef __cplusplus
extern "C" {
#endif

/*******************************************************************************
 * Types
 ******************************************************************************/

struct JRIEnvInterface;

typedef void*           JRIRef;
typedef void*           JRIGlobalRef;

typedef jint            JRIInterfaceID[4];
typedef jint            JRIFieldID;
typedef jint            JRIMethodID;

/* synonyms: */
typedef JRIGlobalRef    jglobal;
typedef JRIRef                jref;

typedef union JRIValue {
      jbool             z;
      jbyte             b;
      jchar             c;
      jshort                  s;
      jint              i;
      jlong             l;
      jfloat                  f;
      jdouble                 d;
      jref              r;
} JRIValue;

typedef JRIValue        jvalue;

typedef enum JRIBoolean {
    JRIFalse            = 0,
    JRITrue             = 1
} JRIBoolean;

typedef enum JRIConstant {
      JRIUninitialized  = -1
} JRIConstant;

/* convenience types: */
typedef JRIRef          jbooleanArray;
typedef JRIRef          jbyteArray;
typedef JRIRef          jcharArray;
typedef JRIRef          jshortArray;
typedef JRIRef          jintArray;
typedef JRIRef          jlongArray;
typedef JRIRef          jfloatArray;
typedef JRIRef          jdoubleArray;
typedef JRIRef          jobjectArray;
typedef JRIRef          jstringArray;
typedef JRIRef          jarrayArray;

#define JRIConstructorMethodName    "<init>"

/*******************************************************************************
 * Signature Construction Macros
 ******************************************************************************/

/*
** These macros can be used to construct signature strings. Hopefully their names
** are a little easier to remember than the single character they correspond to.
** For example, to specify the signature of the method:
**
**    public int read(byte b[], int off, int len);
**
** you could write something like this in C:
**
**    char* readSig = JRISigMethod(JRISigArray(JRISigByte)
**                                               JRISigInt
**                                               JRISigInt) JRISigInt;
**
** Of course, don't put commas between the types.
*/
#define JRISigArray(T)        "[" T
#define JRISigByte                  "B"
#define JRISigChar                  "C"
#define JRISigClass(name)     "L" name ";"
#define JRISigFloat                 "F"
#define JRISigDouble          "D"
#define JRISigMethod(args)    "(" args ")"
#define JRISigNoArgs          ""
#define JRISigInt             "I"
#define JRISigLong                  "J"
#define JRISigShort                 "S"
#define JRISigVoid                  "V"
#define JRISigBoolean         "Z"

/*******************************************************************************
 * Environments
 ******************************************************************************/

extern JRI_PUBLIC_API(const struct JRIEnvInterface**)
JRI_GetCurrentEnv(void);

/*******************************************************************************
 * Specific Scalar Array Types
 ******************************************************************************/

/*
** The JRI Native Method Interface does not support boolean arrays. This
** is to allow Java runtime implementations to optimize boolean array
** storage. Using the ScalarArray operations on boolean arrays is bound
** to fail, so convert any boolean arrays to byte arrays in Java before
** passing them to a native method.
*/

#define JRI_NewByteArray(env, length, initialValues)  \
      JRI_NewScalarArray(env, length, JRISigByte, (jbyte*)(initialValues))
#define JRI_GetByteArrayLength(env, array)      \
      JRI_GetScalarArrayLength(env, array)
#define JRI_GetByteArrayElements(env, array)    \
      JRI_GetScalarArrayElements(env, array)

#define JRI_NewCharArray(env, length, initialValues)  \
      JRI_NewScalarArray(env, ((length) * sizeof(jchar)), JRISigChar, (jbyte*)(initialValues))
#define JRI_GetCharArrayLength(env, array)      \
      JRI_GetScalarArrayLength(env, array)
#define JRI_GetCharArrayElements(env, array)             \
      ((jchar*)JRI_GetScalarArrayElements(env, array))

#define JRI_NewShortArray(env, length, initialValues) \
      JRI_NewScalarArray(env, ((length) * sizeof(jshort)), JRISigShort, (jbyte*)(initialValues))
#define JRI_GetShortArrayLength(env, array)     \
      JRI_GetScalarArrayLength(env, array)
#define JRI_GetShortArrayElements(env, array)            \
      ((jshort*)JRI_GetScalarArrayElements(env, array))

#define JRI_NewIntArray(env, length, initialValues)   \
      JRI_NewScalarArray(env, ((length) * sizeof(jint)), JRISigInt, (jbyte*)(initialValues))
#define JRI_GetIntArrayLength(env, array) \
      JRI_GetScalarArrayLength(env, array)
#define JRI_GetIntArrayElements(env, array)              \
      ((jint*)JRI_GetScalarArrayElements(env, array))

#define JRI_NewLongArray(env, length, initialValues)  \
      JRI_NewScalarArray(env, ((length) * sizeof(jlong)), JRISigLong, (jbyte*)(initialValues))
#define JRI_GetLongArrayLength(env, array)      \
      JRI_GetScalarArrayLength(env, array)
#define JRI_GetLongArrayElements(env, array)             \
      ((jlong*)JRI_GetScalarArrayElements(env, array))

#define JRI_NewFloatArray(env, length, initialValues) \
      JRI_NewScalarArray(env, ((length) * sizeof(jfloat)), JRISigFloat, (jbyte*)(initialValues))
#define JRI_GetFloatArrayLength(env, array)     \
      JRI_GetScalarArrayLength(env, array)
#define JRI_GetFloatArrayElements(env, array)            \
      ((jfloat*)JRI_GetScalarArrayElements(env, array))

#define JRI_NewDoubleArray(env, length, initialValues)      \
      JRI_NewScalarArray(env, ((length) * sizeof(jdouble)), JRISigDouble, (jbyte*)(initialValues))
#define JRI_GetDoubleArrayLength(env, array)    \
      JRI_GetScalarArrayLength(env, array)
#define JRI_GetDoubleArrayElements(env, array)           \
      ((jdouble*)JRI_GetScalarArrayElements(env, array))

/******************************************************************************/
#ifdef __cplusplus
}
#endif
#endif /* JRITYPES_H */
/******************************************************************************/

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