utility.cpp

来自「开放源码的编译器open watcom 1.6.0版的源代码」· C++ 代码 · 共 110 行

/****************************************************************************
*
*                            Open Watcom Project
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*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
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*  ========================================================================
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*    This file contains Original Code and/or Modifications of Original
*    Code as defined in and that are subject to the Sybase Open Watcom
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* Description:  WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
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// Utility Routines
//
// 95/02/02 -- J.W.Welch        -- defined

#include <malloc.h>
#include <new.h>
#include <stdlib.h>

#include "Exc.h"
#include "Utility.h"

Space used;


char * concatStr                // CONCATENATE STRING
    ( char * tgt                // - target
    , char * src )              // - source
{
    while( *src != '\0' ) {
        *tgt++ = *src++;
    }
    *tgt = '\0';
    return tgt;
}


char* concatDec                 // CONCATENATE DECIMAL #
    ( char * tgt                // - target
    , Space value )             // - value
{
    char buf[16];               // - buffer

    ultoa( value, buf, 10 );
    return concatStr( tgt, buf );
}


char* concatHex                 // CONCATENATE HEX #
    ( char * tgt                // - target
    , Space value )             // - value
{
    char buf[16];               // - buffer

    ultoa( value, buf, 16 );
    tgt[0] = '0';
    tgt[1] = 'x';
    return concatStr( &tgt[2], buf );
}


// Cover ::new, ::new[]


static void* my_alloc           // COVER FOR ALLOCATION
    ( size_t size )             // - size
{
    used += size;
    void* p = _fmalloc( size );
    if( 0 == p ) {
        throw Exc( "MEM", "memory exhausted", 0 );
    }
    return p;
}


void* operator new              // ::new
    ( size_t size )             // - size required
{
    return my_alloc( size );
}


void* operator new[]            // ::new[]
    ( size_t size )             // - size required
{
    return my_alloc( size );
}