C++ (Cpp) sol_json_token_get_size示例

示例#1

文件： sol-json.c 项目： brunobottazzini/soletta

SOL_API int
sol_json_token_get_uint64(const struct sol_json_token *token, uint64_t *value)
{
    SOL_NULL_CHECK(token, -EINVAL);
    SOL_NULL_CHECK(value, -EINVAL);

    *value = 0;

    if (token->start >= token->end) {
        SOL_WRN("invalid token: start=%p, end=%p",
            token->start, token->end);
        return -EINVAL;
    }
    if (sol_json_token_get_type(token) != SOL_JSON_TYPE_NUMBER) {
        SOL_WRN("expected number, got token type '%c' for token \"%.*s\"",
            sol_json_token_get_type(token),
            (int)sol_json_token_get_size(token), token->start);
        return -EINVAL;
    }
    if (*token->start == '-') {
        SOL_DBG("%.*s: negative number where unsigned is expected",
            (int)sol_json_token_get_size(token), token->start);
        return -ERANGE;
    }

    return token_get_uint64(token, value);
}

示例#2

文件： sol-json.c 项目： brunobottazzini/soletta

SOL_API int
sol_json_token_get_double(const struct sol_json_token *token, double *value)
{
    char *endptr;
    int r;

    /* NOTE: Using a copy to ensure trailing \0 and strtod() so we
     * properly parse numbers with large precision.
     *
     * Splitting the integer, fractional and exponent parts and doing
     * the math using double numbers will result in rounding errors
     * when parsing DBL_MAX using "%.64g" formatting.
     *
     * Since parsing it is complex (ie:
     * http://www.netlib.org/fp/dtoa.c), we take the short path to
     * call our helper around libc's strtod() that limits the amount
     * of bytes.
     */

    SOL_NULL_CHECK(token, -EINVAL);
    SOL_NULL_CHECK(value, -EINVAL);

    *value = sol_util_strtod_n(token->start, &endptr,
        sol_json_token_get_size(token), false);

    r = -errno;
    if (endptr == token->start)
        r = -EINVAL;
    else if (isinf(*value)) {
        SOL_DBG("token '%.*s' is infinite",
            (int)sol_json_token_get_size(token), token->start);
        if (*value < 0)
            *value = -DBL_MAX;
        else
            *value = DBL_MAX;
        r = -ERANGE;
    } else if (isnan(*value)) {
        SOL_DBG("token '%.*s' is not a number",
            (int)sol_json_token_get_size(token), token->start);
        *value = 0;
        r = -EINVAL;
    } else if (fpclassify(*value) == FP_SUBNORMAL) {
        r = 0;
    }

    return r;
}

示例#3

文件： sol-json.c 项目： brunobottazzini/soletta

static int
token_get_uint64(const struct sol_json_token *token, uint64_t *value)
{
    const char *itr = token->start;
    uint64_t tmpvar = 0;

    if (*itr == '+')
        itr++;

    for (; itr < token->end; itr++) {
        const char c = *itr;
        if (c >= '0' && c <= '9') {
            int r;

            r = sol_util_uint64_mul(tmpvar, 10, &tmpvar);
            if (r < 0)
                goto overflow;

            r = sol_util_uint64_add(tmpvar, c - '0', &tmpvar);
            if (r < 0)
                goto overflow;
            continue;
        }
        *value = tmpvar; /* best effort */
        SOL_DBG("unexpected char '%c' at position %u of integer token %.*s",
            c, (unsigned)(itr - token->start),
            (int)sol_json_token_get_size(token), token->start);
        return -EINVAL;

overflow:
        *value = UINT64_MAX; /* best effort */
        SOL_DBG("number is too large at position %u of integer token %.*s",
            (unsigned)(itr - token->start),
            (int)sol_json_token_get_size(token), token->start);
        return -ERANGE;
    }

    *value = tmpvar;
    return 0;
}

示例#4

文件： sol-json.c 项目： amandawrcoelho/soletta

SOL_API int
sol_json_token_get_int64(const struct sol_json_token *token, int64_t *value)
{
    SOL_NULL_CHECK(token, -EINVAL);
    SOL_NULL_CHECK(value, -EINVAL);

    *value = 0;

    if (token->start >= token->end) {
        SOL_WRN("invalid token: start=%p, end=%p",
            token->start, token->end);
        return -EINVAL;
    }
    if (sol_json_token_get_type(token) != SOL_JSON_TYPE_NUMBER) {
        SOL_WRN("expected number, got token type '%c' for token \"%.*s\"",
            sol_json_token_get_type(token),
            sol_json_token_get_size(token), token->start);
        return -EINVAL;
    }

    return token_get_int64(token, value);
}