#include "input.h"

#define PADDING  '='

int
readb(FILE *fptr, unsigned char *buf, int bufsize)
{
    int read;
    int total;
    unsigned char *begin;
    unsigned char *end;
    unsigned char *left;
    unsigned char *right;
    
    read = total = 0;
    begin = left = buf;
    while (total < bufsize && (read = fread(left, sizeof(*left), bufsize-total, fptr))) {
        total += read;
        end = buf + total;
        for (right = left; right < end; ++right)
            if (*right != '\n')
                *left++ = *right;
        total -= right - left;
    }
    if (left > begin) {
        for (--left; *left == PADDING; --left)
            ;
        ++left;
    }

    return left-begin;
}