itoa.c

Nucleus Common Library for Integrator using ARM Developer Suite

/*************************************************************************
*
*               Copyright Mentor Graphics Corporation 2002
*                         All Rights Reserved.
*
* THIS WORK CONTAINS TRADE SECRET AND PROPRIETARY INFORMATION WHICH IS
* THE PROPERTY OF MENTOR GRAPHICS CORPORATION OR ITS LICENSORS AND IS
* SUBJECT TO LICENSE TERMS.
*
*************************************************************************/

#define NU_NCL_SOURCE_FILE

#include "plus\nucleus.h"                                /* MMU Support */

/*************************************************************************
*
*   FUNCTION
*
*       NCL_itoa
*
*   DESCRIPTION
*
*       This function converts value to a null-terminated ascii string.
*
*   INPUTS
*
*       value           The integer to convert to ASCII
*       *string         Pointer to were the string should be built
*       radix           Base to be used for conversion
*
*   OUTPUTS
*
*       char*           Pointer to the converted integer
*
*************************************************************************/

char *NCL_itoa(int value, char *string, int radix)
{
    int     i, d;
    int     flag = 0;
    char    *ptr = string;

    /* This implementation only works for decimal numbers. */
    if (radix != 10)
    {
        *ptr = 0;

        return string;
    }

    if (!value)
    {
        *ptr++ = 0x30;
        *ptr = 0;

        return string;
    }

    /* if this is a negative value insert the minus sign. */
    if (value < 0)
    {
        *ptr++ = '-';

        /* Make the value positive. */
        value *= -1;
    }

    for (i = 10000; i > 0; i /= 10)
    {
        d = value / i;

        if (d || flag)
        {
            *ptr++ = (char)(d + 0x30);
            value -= (d * i);
            flag = 1;
        }
    }

    /* Null terminate the string. */
    *ptr = 0;

    return string;
} /* NCL_itoa */