src/fstrcmp.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41

/*
 * nanowasm, a tiny WebAssembly/Wasm interpreter
 * Copyright (C) 2023-2024  Xavier Del Campo Romero
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/.
 */

#include <nw/fstring.h>
#include <nw/log.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>

int fstrcmp(const char *str, FILE *const f, const bool abort)
{
    int ret = 0;

    for (size_t i = 0; i < strlen(str); i++)
    {
        uint8_t byte;

        if (!fread(&byte, sizeof byte, 1, f))
        {
            LOG("%s: fread(3) failed, feof=%d, ferror=%d\n",
                __func__, feof(f), ferror(f));
            return -1;
        }
        else if (byte != str[i])
        {
            if (abort)
                return -1;
            else
                ret = -1;
        }
    }

    return ret;
}