From d573723196f4f0c97e64d5a3a7adbabd3d51a429 Mon Sep 17 00:00:00 2001
From: "Matthias P. Braendli" <matthias.braendli@mpb.li>
Date: Fri, 8 Dec 2017 08:16:20 +0100
Subject: Rename prbs to PrbsGenerator

Some systems apparently don't like having both prbs.h and Prbs.h
in the include paths.

OSX seems to be affected
---
 src/prbs.cpp | 143 -----------------------------------------------------------
 1 file changed, 143 deletions(-)
 delete mode 100644 src/prbs.cpp

(limited to 'src/prbs.cpp')

diff --git a/src/prbs.cpp b/src/prbs.cpp
deleted file mode 100644
index b0e3d6d..0000000
--- a/src/prbs.cpp
+++ /dev/null
@@ -1,143 +0,0 @@
-/*
-   Copyright (C) 2005, 2006, 2007, 2008, 2009 Her Majesty the Queen in Right
-   of Canada (Communications Research Center Canada)
-   */
-/*
-   This file is part of ODR-DabMux.
-
-   ODR-DabMux is free software: you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as
-   published by the Free Software Foundation, either version 3 of the
-   License, or (at your option) any later version.
-
-   ODR-DabMux is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with ODR-DabMux.  If not, see <http://www.gnu.org/licenses/>.
-   */
-
-#include "prbs.h"
-
-#include <string.h>
-#include <limits.h>
-
-
-/*
- * Generate a parity check for a 32-bit word.
- */
-static uint32_t parity_check(uint32_t prbs_accum)
-{
-    uint32_t mask = 1;
-    uint32_t parity = 0;
-    for (int i = 0; i < 32; ++i) {
-        parity ^= ((prbs_accum & mask) != 0);
-        mask <<= 1;
-    }
-    return parity;
-}
-
-void PrbsGenerator::setup(uint32_t polynomial)
-{
-    this->polynomial = polynomial;
-    this->accum = 0;
-    gen_prbs_table();
-    gen_weight_table();
-}
-
-uint8_t PrbsGenerator::step()
-{
-    accum = update_prbs();
-    return accum & 0xff;
-}
-
-void PrbsGenerator::rewind()
-{
-    while (accum < polynomial) {
-        accum <<= 1;
-        accum |= 1;
-    }
-}
-
-void PrbsGenerator::gen_prbs_table()
-{
-    for (int i = 0; i < 4; ++i) {
-        for (int j = 0; j < 256; ++j) {
-            uint32_t prbs_accum = ((uint32_t)j << (i * 8));
-            for (int k = 0; k < 8; ++k) {
-                prbs_accum = (prbs_accum << 1)
-                    ^ parity_check(prbs_accum & polynomial);
-            }
-
-            prbs_table[i][j] = (prbs_accum & 0xff);
-        }
-    }
-}
-
-uint32_t PrbsGenerator::update_prbs()
-{
-    uint8_t acc_lsb = 0;
-    for (int i = 0; i < 4; ++i ) {
-        acc_lsb ^= prbs_table [i] [ (accum >> (i * 8) ) & 0xff ];
-    }
-    return (accum << 8) ^ ((uint32_t)acc_lsb);
-}
-
-void PrbsGenerator::gen_weight_table()
-{
-    for (int i = 0; i < 256; ++i) {
-        uint8_t mask = 1;
-        uint8_t ones_count = 0;
-
-        for (int j = 0; j < 8; ++j) {
-            ones_count += ((i & mask) != 0);
-            mask = mask << 1;
-        }
-        weight[i] = ones_count;
-    }
-}
-
-size_t PrbsGenerator::error_count(
-        uint8_t *rx_data,
-        size_t rx_data_length)
-{
-    uint32_t error_count = 0;
-    uint32_t prbs_accum = 0;
-
-    /* seed the PRBS accumulator */
-    for (int i = 0; i < 4; ++i) {
-        prbs_accum = (prbs_accum << 8) ^ (rx_data[i] ^ polarity_mask);
-    }
-
-    /* check the received data */
-    for (size_t i = 0; i < rx_data_length; ++i) {
-        uint8_t error_pattern =
-            (prbs_accum >> 24) ^ (rx_data[i] ^ polarity_mask);
-
-        if (error_pattern != 0) {
-            error_count += weight[error_pattern];
-        }
-        prbs_accum = update_prbs();
-    }
-    return error_count;
-}
-
-void PrbsGenerator::gen_sequence(
-        uint8_t *tx_data,
-        size_t tx_data_length,
-        uint32_t polynomial)
-{
-    uint32_t prbs_accum = 0;
-
-    while (prbs_accum < polynomial) {
-        prbs_accum <<= 1;
-        prbs_accum |= 1;
-    }
-
-    for (size_t i = 0; i < tx_data_length; i++) {
-        prbs_accum = update_prbs();
-        tx_data[i] = (uint8_t)(prbs_accum & 0xff);
-    }
-}
-- 
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