Play the String Handling

/* Developed by Utroz
 * Access: http://www.oakcoders.com
 * File: str_handling.c
 *
 * printk(KERN_DEBUG "Dennis Ritchie(d.m.r) died. Rest in peace.");
 */

#include <stdlib.h>

int get_line(char *, int);
void remove_blank(char *);
void sort_array(char *, int);
void str_copy(char *, char *);
int str_length(char *);
char *str_reverse(char *);

/* This function fetch a character string and return its value */
get_line(char *args, int limit)
{
        short i;
        char c;

        for(i = 0; i < (limit-1) && ((c = getchar()) != EOF && c != '\n'); i++)
        if(c != ' ' && c != '\t' && c != '\b')
                args[i] = c;

        args[i] = '\0';

        return i;
}

/* This function remove entirely blank lines */
void remove_blank(char *args)
{
        short i;

        for(i = 0; args[i]; i++) {
        if(args[i] == ' ')
                sort_array(args, i);
        }
}

void sort_array(char *args, int i)
{
        for(; args[i]; i++)
        args[i] = args[i+1];
}

/* Copy a from string to a destination string */
void str_copy(char *to, char *from)
{
        while(*(to++) = *(from++));
}

int str_length(char *args)
{
        signed char count;

        for(count = 0; args[count]; count++);

        return (int) count;
}

/* Reverse a character string
 * Example to use: char *ptr;
 *     ptr = reverse_str(str);
 * At end of function put free(ptr);
 */
char *str_reverse(char *args)
{
        char *new_str;
        short i,j;

        new_str = malloc(str_length(args) * sizeof(char));
        if(new_str == NULL) {
        puts("Memory can't be allocated!");
        exit(EXIT_FAILURE);
        }

        j = 0;
        for(i = str_length(args)-1; i >= 0; i--)
        new_str[j++] = args[i];

        return new_str;
}