Ejemplo n.º 1
0
// Runs charset auto-detection on the input buffer, and returns the result.
// If auto-detection fails, NULL is returned.
// If user_cp doesn't refer to any known auto-detection (for example because
// it's a real iconv codepage), user_cp is returned without even looking at
// the buf data.
const char *mp_charset_guess(struct mp_log *log, bstr buf, const char *user_cp,
                             int flags)
{
    if (!mp_charset_requires_guess(user_cp))
        return user_cp;

    // Do our own UTF-8 detection, because at least ENCA seems to get it
    // wrong sometimes (suggested by divVerent).
    int r = bstr_validate_utf8(buf);
    if (r >= 0 || (r > -8 && (flags & MP_ICONV_ALLOW_CUTOFF)))
        return "UTF-8";

    bstr params[3] = {{0}};
    split_colon(user_cp, 3, params);

    bstr type = params[0];
    char lang[100];
    snprintf(lang, sizeof(lang), "%.*s", BSTR_P(params[1]));
    const char *fallback = params[2].start; // last item, already 0-terminated

    const char *res = NULL;

#if HAVE_ENCA
    if (bstrcasecmp0(type, "enca") == 0)
        res = enca_guess(log, buf, lang);
#endif
#if HAVE_LIBGUESS
    if (bstrcasecmp0(type, "guess") == 0)
        res = libguess_guess(log, buf, lang);
#endif
    if (bstrcasecmp0(type, "utf8") == 0 || bstrcasecmp0(type, "utf-8") == 0) {
        if (!fallback)
            fallback = params[1].start; // must be already 0-terminated
    }

    if (res) {
        mp_dbg(log, "%.*s detected charset: '%s'\n",
               BSTR_P(type), res);
    } else {
        res = fallback;
        mp_dbg(log, "Detection with %.*s failed: fallback to %s\n",
               BSTR_P(type), res && res[0] ? res : "broken UTF-8/Latin1");
    }

    if (!res && !(flags & MP_STRICT_UTF8))
        res = "UTF-8-BROKEN";

    return res;
}
Ejemplo n.º 2
0
// Runs charset auto-detection on the input buffer, and returns the result.
// If auto-detection fails, NULL is returned.
// If user_cp doesn't refer to any known auto-detection (for example because
// it's a real iconv codepage), user_cp is returned without even looking at
// the buf data.
const char *mp_charset_guess(bstr buf, const char *user_cp)
{
    if (!mp_charset_requires_guess(user_cp))
        return user_cp;

    bstr params[3] = {{0}};
    split_colon(user_cp, 3, params);

    bstr type = params[0];
    char lang[100];
    snprintf(lang, sizeof(lang), "%.*s", BSTR_P(params[1]));
    const char *fallback = params[2].start; // last item, already 0-terminated

    const char *res = NULL;

#ifdef CONFIG_ENCA
    if (bstrcasecmp0(type, "enca") == 0)
        res = enca_guess(buf, lang);
#endif
#ifdef CONFIG_LIBGUESS
    if (bstrcasecmp0(type, "guess") == 0)
        res = libguess_guess(buf, lang);
#endif

    if (res) {
        mp_msg(MSGT_SUBREADER, MSGL_DBG2, "%.*s detected charset: '%s'\n",
               BSTR_P(type), res);
    } else {
        res = fallback;
        mp_msg(MSGT_SUBREADER, MSGL_DBG2,
               "Detection with %.*s failed: fallback to %s\n",
               BSTR_P(type), res && res[0] ? res : "no conversion");
    }

    return res;
}
Ejemplo n.º 3
0
// Runs charset auto-detection on the input buffer, and returns the result.
// If auto-detection fails, NULL is returned.
// If user_cp doesn't refer to any known auto-detection (for example because
// it's a real iconv codepage), user_cp is returned without even looking at
// the buf data.
// The return value may (but doesn't have to) be allocated under talloc_ctx.
const char *mp_charset_guess(void *talloc_ctx, struct mp_log *log, bstr buf,
                             const char *user_cp, int flags)
{
    if (!mp_charset_requires_guess(user_cp))
        return user_cp;

    bool use_auto = strcasecmp(user_cp, "auto") == 0;
    if (use_auto) {
#if HAVE_UCHARDET
        user_cp = "uchardet";
#elif HAVE_ENCA
        user_cp = "enca";
#else
        user_cp = "UTF-8:UTF-8-BROKEN";
#endif
    }

    bstr params[3] = {{0}};
    split_colon(user_cp, 3, params);

    bstr type = params[0];
    char lang[100];
    snprintf(lang, sizeof(lang), "%.*s", BSTR_P(params[1]));
    const char *fallback = params[2].start; // last item, already 0-terminated

    const char *res = NULL;

    if (use_auto) {
        res = ms_bom_guess(buf);
        if (res)
            type = bstr0("auto");
    }

#if HAVE_ENCA
    if (bstrcasecmp0(type, "enca") == 0)
        res = enca_guess(log, buf, lang);
#endif
#if HAVE_LIBGUESS
    if (bstrcasecmp0(type, "guess") == 0)
        res = libguess_guess(log, buf, lang);
#endif
#if HAVE_UCHARDET
    if (bstrcasecmp0(type, "uchardet") == 0)
        res = mp_uchardet(talloc_ctx, log, buf);
#endif

    if (bstrcasecmp0(type, "utf8") == 0 || bstrcasecmp0(type, "utf-8") == 0) {
        if (!fallback)
            fallback = params[1].start; // must be already 0-terminated
        int r = bstr_validate_utf8(buf);
        if (r >= 0 || (r > -8 && (flags & MP_ICONV_ALLOW_CUTOFF)))
            res = "utf-8";
    }

    if (res) {
        mp_dbg(log, "%.*s detected charset: '%s'\n", BSTR_P(type), res);
    } else {
        res = fallback;
        mp_dbg(log, "Detection with %.*s failed: fallback to %s\n",
               BSTR_P(type), res && res[0] ? res : "broken UTF-8/Latin1");
    }

    if (!res && !(flags & MP_STRICT_UTF8))
        res = "UTF-8-BROKEN";

    mp_verbose(log, "Using charset '%s'.\n", res);
    return res;
}