int uei_508_read_record(int m_port, char *m_buf, size_t m_buflen, const char *m_delim, uint32_t m_delimlen) { ph_buf_t *tmp_buf; if ((tmp_buf = ph_bufq_consume_record(SL508_read_buffer[m_port], m_delim, m_delimlen))) { size_t len = min((size_t)ph_buf_len(tmp_buf), m_buflen); if (len) memcpy(m_buf, ph_buf_mem(tmp_buf), len); ph_buf_delref(tmp_buf); return len; } else { return 0; } }
static void test_straddle_edges(void) { const char *delim = "\r\n"; int delim_len = strlen(delim); int default_buf_size = 8192; int i; char pad[8192]; memset(pad, 'x', sizeof(pad)); #define PAD_IT(__n) { \ uint64_t n = __n; \ while (n > 0) { \ ph_bufq_append(q, pad, MIN(n, sizeof(pad)), 0); \ n -= MIN(n, sizeof(pad)); \ } \ } // We want two buffers: [8192][8192] // And then to place our delimiter around the first boundary to verify // that the delimiter matching operates correctly // We define a cursor offset relative to the end of the first buffer // (0 means the last byte of the delimiter is in the last byte of the // first buffer, 1 means that the last delimiter byte is in the first // byte of the second buffer) for (i = - 2 * delim_len; i < 2 * delim_len; i++) { ph_bufq_t *q; q = ph_bufq_new(16*1024); // Fill up the start of the buffer uint64_t num_first = default_buf_size + i - delim_len; // first data PAD_IT(num_first); is(num_first, ph_bufq_len(q)); // first delim ph_bufq_append(q, delim, delim_len, 0); // second data PAD_IT(16); // second delim ph_bufq_append(q, delim, delim_len, 0); ph_buf_t *first = ph_bufq_consume_record(q, delim, delim_len); is_int(num_first + 2, ph_buf_len(first)); ph_buf_t *second = ph_bufq_consume_record(q, delim, delim_len); is_int(18, ph_buf_len(second)); diag("for i = %d, num_first = %d. first->len=%d second->len=%d", i, (int)num_first, (int)ph_buf_len(first), (int)ph_buf_len(second)); ph_buf_delref(first); ph_buf_delref(second); ph_bufq_free(q); } // Now, test the case where we have a partial match at a boundary, but not // the true match until later ph_bufq_t *q; q = ph_bufq_new(24*1024); PAD_IT(8191); ph_bufq_append(q, "\r", 1, 0); PAD_IT(8192); ph_bufq_append(q, delim, delim_len, 0); ph_buf_t *first = ph_bufq_consume_record(q, delim, delim_len); is_int(16386, ph_buf_len(first)); ph_buf_delref(first); ph_bufq_free(q); }