コード例 #1
0
ファイル: load.c プロジェクト: nbronson/jansson
static void stream_unget(stream_t *stream, int c)
{
    if(c == STREAM_STATE_EOF || c == STREAM_STATE_ERROR)
        return;

    stream->position--;
    if(c == '\n') {
        stream->line--;
        stream->column = stream->last_column;
    }
    else if(json_utf8_check_first(c))
        stream->column--;

    assert(stream->buffer_pos > 0);
    stream->buffer_pos--;
    assert(stream->buffer[stream->buffer_pos] == c);
}
コード例 #2
0
ファイル: json.c プロジェクト: edvinanet/asterisk
int ast_json_utf8_check_len(const char *str, size_t len)
{
	size_t pos;
	size_t count;
	int res = 1;

	if (!str) {
		return 0;
	}

	/*
	 * Since the json library does not make the check function
	 * public we recreate/copy the function in our interface
	 * module.
	 *
	 * Loop ported from libjansson utf.c:utf8_check_string()
	 */
	for (pos = 0; pos < len; pos += count) {
		count = json_utf8_check_first(str[pos]);
		if (count == 0) {
			res = 0;
			break;
		} else if (count > 1) {
			if (count > len - pos) {
				/* UTF-8 needs more than we have left in the string. */
				res = 0;
				break;
			}

			if (!json_utf8_check_full(&str[pos], count)) {
				res = 0;
				break;
			}
		}
	}

	if (!res) {
		ast_debug(1, "String '%.*s' is not UTF-8 for json conversion\n", (int) len, str);
	}
	return res;
}
コード例 #3
0
ファイル: load.c プロジェクト: nbronson/jansson
static int stream_get(stream_t *stream, json_error_t *error)
{
    int c;

    if(stream->state != STREAM_STATE_OK)
        return stream->state;

    if(!stream->buffer[stream->buffer_pos])
    {
        c = stream->get(stream->data);
        if(c == EOF) {
            stream->state = STREAM_STATE_EOF;
            return STREAM_STATE_EOF;
        }

        stream->buffer[0] = c;
        stream->buffer_pos = 0;

        if(0x80 <= c && c <= 0xFF)
        {
            /* multi-byte UTF-8 sequence */
            int i, count;

            count = json_utf8_check_first(c);
            if(!count)
                goto out;

            assert(count >= 2);

            for(i = 1; i < count; i++)
                stream->buffer[i] = stream->get(stream->data);

            if(!json_utf8_check_full(stream->buffer, count, NULL))
                goto out;

            stream->buffer[count] = '\0';
        }
        else
            stream->buffer[1] = '\0';
    }

    c = stream->buffer[stream->buffer_pos++];

    stream->position++;
    if(c == '\n') {
        stream->line++;
        stream->last_column = stream->column;
        stream->column = 0;
    }
    else if(json_utf8_check_first(c)) {
        /* track the Unicode character column, so increment only if
           this is the first character of a UTF-8 sequence */
        stream->column++;
    }

    return c;

out:
    stream->state = STREAM_STATE_ERROR;
    error_set(error, stream_to_lex(stream), "unable to decode byte 0x%x", c);
    return STREAM_STATE_ERROR;
}