Logo Search packages:      
Sourcecode: neko version File versions  Download package

int32.c

/* ************************************************************************ */
/*                                                                                                                */
/*  Neko Standard Library                                                                             */
/*  Copyright (c)2005 Motion-Twin                                                               */
/*                                                                                                                */
/* This library is free software; you can redistribute it and/or              */
/* modify it under the terms of the GNU Lesser General Public                       */
/* License as published by the Free Software Foundation; either                     */
/* version 2.1 of the License, or (at your option) any later version.         */
/*                                                                                                                */
/* This library is distributed in the hope that it will be useful,                  */
/* but WITHOUT ANY WARRANTY; without even the implied warranty of             */
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU          */
/* Lesser General Public License or the LICENSE file for more details.        */
/*                                                                                                                */
/* ************************************************************************ */
#include <neko.h>

/**
      <doc>
      <h1>Int32</h1>
      <p>
      Int32 is an abstract type that can be used to store the full 32 bits of an
      integer. The type ['int32] means that the value is a real int32. The type
      [#int32] means [(int | 'int32)] and accept then the both kind of integers.
      </p>
      </doc>
**/

/**
      int32_new : #int32 -> 'int32
      <doc>Allocate an int32 from any integer</doc>
**/
static value int32_new( value v ) { 
      val_check(v,int32);     
      return alloc_int32(val_int32(v));
}

/**
      int32_to_int : #int32 -> int
      <doc>Return the int value if it can be represented using 31 bits. Error either</doc>
**/
static value int32_to_int( value v ) {
      int i;
      val_check(v,int32);
      i = val_int32(v);
      if( need_32_bits(i) )
            neko_error();
      return alloc_int(i);
}

/**
      int32_to_float : #int32 -> float
      <doc>Return the float value of the integer.</doc>
**/
static value int32_to_float( value v ) {
      val_check(v,int32);     
      return alloc_float(val_int32(v));
}

/**
      int32_compare : #int32 -> #int32 -> int
      <doc>Compare two integers</doc>
**/
static value int32_compare( value v1, value v2 ) {
      int i1, i2;
      val_check(v1,int32);
      val_check(v2,int32);
      i1 = val_int32(v1);
      i2 = val_int32(v2);
      if( i1 == i2 )
            return alloc_int(0);
      else if( i1 > i2 )
            return alloc_int(1);
      else
            return alloc_int(-1);
}

#define INT32_OP(op_name,op) \
      static value int32_##op_name( value v1, value v2 ) { \
            int r; \
            val_check(v1,int32); \
            val_check(v2,int32); \
            r = val_int32(v1) op val_int32(v2); \
            return alloc_best_int(r); \
      } \
      DEFINE_PRIM(int32_##op_name,2)

#define INT32_UNOP(op_name,op) \
      static value int32_##op_name( value v ) { \
            int r; \
            val_check(v,int32); \
            r = op val_int32(v); \
            return alloc_best_int(r); \
      } \
      DEFINE_PRIM(int32_##op_name,1)

#define INT32_OP_ZERO(op_name,op) \
      static value int32_##op_name( value v1, value v2 ) { \
            int d; \
            int r; \
            val_check(v1,int32); \
            val_check(v2,int32); \
            d = val_int32(v2); \
            if( d == 0 ) \
                  neko_error(); \
            r = val_int32(v1) op d; \
            return alloc_best_int(r); \
      } \
      DEFINE_PRIM(int32_##op_name,2)

/**
      int32_ushr : #int32 -> #int32 -> #int32
      <doc>Perform unsigned right bits-shifting</doc>
**/
static value int32_ushr( value v1, value v2 ) {
      int r;
      val_check(v1,int32);
      val_check(v2,int32);
      r = ((unsigned int)val_int32(v1)) >> val_int32(v2);
      return alloc_best_int(r);
}

/** 
      int32_add : #int32 -> #int32 -> #int32
      <doc>Add two integers</doc>
**/
INT32_OP(add,+);
/** 
      int32_sub : #int32 -> #int32 -> #int32
      <doc>Subtract two integers</doc>
**/
INT32_OP(sub,-);
/** 
      int32_mul : #int32 -> #int32 -> #int32
      <doc>Multiply two integers</doc>
**/
INT32_OP(mul,*);
/** 
      int32_div : #int32 -> #int32 -> #int32
      <doc>Divide two integers. Error on division by 0</doc>
**/
INT32_OP_ZERO(div,/);
/** 
      int32_shl : #int32 -> #int32 -> #int32
      <doc>Perform left bit-shifting</doc>
**/
INT32_OP(shl,<<);
/** 
      int32_shr : #int32 -> #int32 -> #int32
      <doc>Perform right bit-shifting</doc>
**/
INT32_OP(shr,>>);
/** 
      int32_mod : #int32 -> #int32 -> #int32
      <doc>Return the modulo of one integer by the other. Error on modulo by 0</doc>
**/
INT32_OP_ZERO(mod,%);
/** 
      int32_neg : #int32 -> #int32
      <doc>Return the negative value of an integer</doc>
**/
INT32_UNOP(neg,-);
/** 
      int32_complement : #int32 -> #int32
      <doc>Return the one-complement bitwised integer</doc>
**/
INT32_UNOP(complement,~);
/** 
      int32_or : #int32 -> #int32 -> #int32
      <doc>Return the bitwise or of two integers</doc>
**/
INT32_OP(or,|);
/** 
      int32_and : #int32 -> #int32 -> #int32
      <doc>Return the bitwise and of two integers</doc>
**/
INT32_OP(and,&);
/** 
      int32_xor : #int32 -> #int32 -> #int32
      <doc>Return the bitwise xor of two integers</doc>
**/
INT32_OP(xor,^);

/**
      int32_address : any -> #int32
      <doc>
      Return the address of the value. 
      The address should not be considered constant. It is not unique
      either unless you are sure you are running on a 32-bit platform.
      </doc>
**/
static value int32_address( value v ) {
      return alloc_best_int((int_val)v);
}

DEFINE_PRIM(int32_new,1);
DEFINE_PRIM(int32_to_int,1);
DEFINE_PRIM(int32_to_float,1);
DEFINE_PRIM(int32_compare,2);
DEFINE_PRIM(int32_ushr,2)
DEFINE_PRIM(int32_address,1);

/* ************************************************************************ */

Generated by  Doxygen 1.6.0   Back to index