/*-
 * Copyright 2022 Netflix, Inc
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#include "stand.h"
#include "host_syscall.h"
#include "util.h"

bool
file2str(const char *fn, char *buffer, size_t buflen)
{
        int fd;
        ssize_t len;

        fd = host_open(fn, HOST_O_RDONLY, 0);
        if (fd == -1)
                return false;
        len = host_read(fd, buffer, buflen - 1);
        if (len < 0) {
                host_close(fd);
                return false;
        }
        buffer[len] = '\0';
        /*
         * Trim trailing white space
         */
        while (isspace(buffer[len - 1]))
                buffer[--len] = '\0';
        host_close(fd);
        return true;
}

bool
file2u64(const char *fn, uint64_t *val)
{
        unsigned long long v;
        char buffer[80];

        if (!file2str(fn, buffer, sizeof(buffer)))
                return false;
        v = strtoull(buffer, NULL, 0);  /* XXX check return values? */
        *val = v;
        return true;
}

bool
file2u32(const char *fn, uint32_t *val)
{
        unsigned long v;
        char buffer[80];

        if (!file2str(fn, buffer, sizeof(buffer)))
                return false;
        v = strtoul(buffer, NULL, 0);   /* XXX check return values? */
        *val = v;
        return true;
}