csim/util.c


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/*
    Système Digital
    2013-2014
    Alex AUVOLAT

    util.c  Various utility functions used elsewhere
*/


#include "sim.h"

int pow2(int exp) {
    return (1 << exp);
}

t_value read_bool(FILE *stream, t_value *mask) {
    t_value r = 0;
    t_value pow = 1;

    char c;
    if (mask != NULL) *mask = 0;

    for(;;) {
        fscanf(stream, "%c", &c);
        if (c == '1') {
            r |= pow;
        } else if (c != '0') {
            break;
        }
        if (mask != NULL) (*mask) |= pow;

        pow *= 2;
    }

    return r;
}

int is_prefix(const char *prefix, const char *str) {
    while (*prefix) {
        if (*prefix != *str) return 0;
        prefix++;
        str++;
    }
    return 1;
}