142 lines
3.6 KiB
C
142 lines
3.6 KiB
C
/* Utility macros to handle Java(TM) byte codes.
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Copyright (C) 1996, 1998, 1999 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA.
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Java and all Java-based marks are trademarks or registered trademarks
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of Sun Microsystems, Inc. in the United States and other countries.
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The Free Software Foundation is independent of Sun Microsystems, Inc. */
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/* Written by Per Bothner <bothner@cygnus.com>, February 1996. */
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#ifndef JAVAOP_H
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#define JAVAOP_H
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typedef unsigned char uint8;
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#ifndef int16
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#define int16 short
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#endif
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typedef unsigned int16 uint16;
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#ifndef int32
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#define int32 long
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#endif
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typedef unsigned int32 uint32;
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/* A signed 64-bit (or more) integral type, suiteable for Java's 'long'. */
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#ifndef int64
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#define int64 long long
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#endif
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/* An unsigned 64-bit (or more) integral type, same length as int64. */
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#ifndef uint64
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#define uint64 unsigned int64
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#endif
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typedef uint16 jchar;
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#ifdef __STDC__
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typedef signed char jbyte;
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#else
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typedef char jbyte;
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#endif
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typedef int16 jshort;
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typedef int32 jint;
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typedef int64 jlong;
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typedef void* jref;
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/* A 32-bit IEEE single-precision float. */
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#ifndef jfloat
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#define jfloat float
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#endif
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/* A 32-bit IEEE double-precision float. */
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#ifndef jdouble
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#define jdouble double
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#endif
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union Word {
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jint i;
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jfloat f;
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void *p;
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};
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/* A jword is an unsigned integral type big enough for a 32-bit jint
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or jfloat *or* a pointer. It is the type appropriate for stack
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locations and local variables in a Java interpreter. */
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#ifndef jword
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#define jword uint32
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#endif
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#ifndef IMMEDIATE_u1
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#define IMMEDIATE_u1 (PC++, CHECK_PC_IN_RANGE(PC), BCODE[PC-1])
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#endif
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#ifndef IMMEDIATE_s1
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#define IMMEDIATE_s1 (PC++, CHECK_PC_IN_RANGE(PC), (signed char)BCODE[PC-1])
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#endif
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#ifndef IMMEDIATE_s2
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#define IMMEDIATE_s2 (PC+=2, CHECK_PC_IN_RANGE(PC), \
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(signed char) BCODE[PC-2] * 256 + BCODE[PC-1])
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#endif
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#ifndef IMMEDIATE_u2
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#define IMMEDIATE_u2 (PC+=2, CHECK_PC_IN_RANGE(PC),\
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(BCODE[PC-2] * 256 + BCODE[PC-1]))
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#endif
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#ifndef IMMEDIATE_s4
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#define IMMEDIATE_s4 (PC+=4, CHECK_PC_IN_RANGE(PC), \
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((jint)((BCODE[PC-4] << 24) | (BCODE[PC-3] << 16) \
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| (BCODE[PC-2] << 8) | (BCODE[PC-1]))))
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#endif
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static inline jfloat
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WORD_TO_FLOAT(jword w)
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{ union Word wu;
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wu.i = w;
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return wu.f;
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}
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static inline jlong
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WORDS_TO_LONG(jword hi, jword lo)
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{
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return ((jlong) hi << 32) | ((jlong)lo & (((jlong)1 << 32) -1));
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}
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union DWord {
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jdouble d;
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jlong l;
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jword w[2];
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};
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static inline jdouble
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WORDS_TO_DOUBLE(jword hi, jword lo)
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{ union DWord wu;
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wu.l = WORDS_TO_LONG(hi, lo);
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return wu.d;
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}
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/* If PREFIX_CHAR is the first character of the Utf8 encoding of a character,
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return the number of bytes taken by the encoding.
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Return -1 for a continuation character. */
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#define UT8_CHAR_LENGTH(PREFIX_CHAR) \
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((unsigned char)(PREFIX_CHAR) < 128 ? 1 \
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: ((PREFIX_CHAR) & 0x40) == 0 ? -1 \
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: ((PREFIX_CHAR) & 0x20) == 0 ? 2 \
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: ((PREFIX_CHAR) & 0x10) == 0 ? 3 \
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: ((PREFIX_CHAR) & 0x08) == 0 ? 4 : 5)
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#endif /* !JAVAOP_H */
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