send-sds/common.c at master · bsl/send-sds · GitHub

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#define XOPEN_SOURCE 600 // strtoul

#include "err.h"
#include "common.h"

#include <stdlib.h>
#include <errno.h>

int
convert_channel_num(
    char *s,
    unsigned int *channel_num,
    err_t err
) {
    unsigned int ui;

    if (!convert_string_to_unsigned_int(s, &ui)) {
        err_set2(err, "invalid channel number \"%s\"", s);
        return 0;
    }

    if (ui > 15) {
        err_set2(err, "invalid channel number \"%s\", should be 0..15", s);
    }

    *channel_num = ui;
    return 1;
}

int
convert_sample_num(
    char *s,
    unsigned int *sample_num,
    err_t err
) {
    unsigned int ui;

    if (!convert_string_to_unsigned_int(s, &ui)) {
        err_set2(err, "invalid sample number \"%s\"", s);
        return 0;
    }

    if (ui > 16383) {
        err_set2(err, "invalid sample number \"%s\", should be 0..16383", s);
    }

    *sample_num = ui;
    return 1;
}

int
convert_string_to_unsigned_int(
    char *s,
    unsigned int *ui
) {
    char *endptr;
    unsigned int c;

    errno = 0;
    c = strtoul(s, &endptr, 0);

    if (
        errno   != 0    ||
        *s      == '\0' ||
        *endptr != '\0'
    ) {
        return 0;
    }

    *ui = c;
    return 1;
}

const char *
response_to_string(response_type response) {
    switch (response) {
    case RESPONSE_ACK:     return "ACK";
    case RESPONSE_NAK:     return "NAK";
    case RESPONSE_CANCEL:  return "CANCEL";
    case RESPONSE_WAIT:    return "WAIT";
    case RESPONSE_TIMEOUT: return "TIMEOUT";
    case RESPONSE_NULL:    return "NULL";
    }

    return "UNKNOWN";
}