Commit f55e16cf authored by Archit Tamarapu's avatar Archit Tamarapu
Browse files

update is_number() function

parent cc6048c3

lib_util/cmdl_tools.c

+43 −4
Original line number Diff line number Diff line
@@ -62,7 +62,7 @@ char *to_upper( char *str ) 
 * Check if a string contains only digits.

 *---------------------------------------------------------------------*/



bool is_digits_only( char *str )

bool is_digits_only( const char *str )

{

    int16_t i;
@@ -86,19 +86,58 @@ bool is_digits_only( char *str ) 
 * Check if a string is a number.

 *---------------------------------------------------------------------*/



bool is_number( char *str )

bool is_number( const char *str )

{

    int16_t i;

    int16_t decimal_separator_count;

    int16_t numeric_len;



    i = 0;

    decimal_separator_count = 0;

    numeric_len = 0;



    /* Check for null string or sign character */

    if ( str[i] == '\0' )

    {

        return false;

    }

    else if ( str[i] == '+' || str[i] == '-' )

    {

        i++;

    }



    /* Ensure rest of string is numeric and only one decimal separator is present */

    while ( str[i] != 0 )

    {

        if ( ( str[i] < '0' || str[i] > '9' ) && str[i] != '.' && str[i] != '-' && str[i] != '\n' && str[i] != '\r' )

        if ( str[i] < '0' || str[i] > '9' )

        {

            if ( str[i] == '.' )

            {

                if ( decimal_separator_count > 1 )

                {

                    return false;

                }

                else

                {

                    decimal_separator_count++;

                }

            }

            else if ( str[i] != '\r' && str[i] != '\n' )

            {

                return false;

            }

        }

        else

        {

            numeric_len++;

        }

        i++;

    }



    if ( numeric_len == 0 )

    {

        return false;

    }



    return true;

}

lib_util/cmdl_tools.h

+2 −2
Original line number Diff line number Diff line
@@ -36,9 +36,9 @@ 
#include <stdbool.h>

#include <stdint.h>



bool is_digits_only( char *str );

bool is_digits_only( const char *str );



bool is_number( char *str );

bool is_number( const char *str );



char *to_upper( char *str );