From 6e9a62d578312fcc05eda7a9efc90c1a83c6b8ce Mon Sep 17 00:00:00 2001
From: leo <leo@brix.(none)>
Date: Thu, 17 Apr 2008 15:18:16 +0100
Subject: fire code fixup

---
 gsm-tvoid/src/lib/Makefile.am |  2 +-
 gsm-tvoid/src/lib/cch.c       |  1 +
 gsm-tvoid/src/lib/fire_crc.c  | 29 ++++++++++++++---------------
 gsm-tvoid/src/lib/fire_crc.h  | 31 ++++++-------------------------
 4 files changed, 22 insertions(+), 41 deletions(-)

(limited to 'gsm-tvoid')

diff --git a/gsm-tvoid/src/lib/Makefile.am b/gsm-tvoid/src/lib/Makefile.am
index 8a84086..f4072d9 100755
--- a/gsm-tvoid/src/lib/Makefile.am
+++ b/gsm-tvoid/src/lib/Makefile.am
@@ -38,7 +38,7 @@ ourlib_LTLIBRARIES = _gsm.la
 
 # These are the source files that go into the shared library
 _gsm_la_SOURCES = 			\
-	fire_crc.			\
+	fire_crc.c			\
 	gsmstack.c			\
 	interleave.c			\
 	conv.c				\
diff --git a/gsm-tvoid/src/lib/cch.c b/gsm-tvoid/src/lib/cch.c
index 8070649..17ee4ee 100644
--- a/gsm-tvoid/src/lib/cch.c
+++ b/gsm-tvoid/src/lib/cch.c
@@ -419,6 +419,7 @@ static unsigned char *decode_sacch(GS_CTX *ctx, unsigned char *burst, unsigned i
 			DEBUGF("error: sacch: parity error (%d)\n", errors);
 			return NULL;
 		} else {
+			DEBUGF("Successfully corrected parity bits!\n");
 			memcpy(decoded_data, crc_result, sizeof crc_result);
 			errors = 0;
 		}
diff --git a/gsm-tvoid/src/lib/fire_crc.c b/gsm-tvoid/src/lib/fire_crc.c
index ea14bcb..c9f0348 100644
--- a/gsm-tvoid/src/lib/fire_crc.c
+++ b/gsm-tvoid/src/lib/fire_crc.c
@@ -21,8 +21,8 @@
  */
 
 #include "fire_crc.h"
-#include <math.h>
-#include <iostream>
+#include <stdio.h>
+#include <string.h>
 
 #define REM(x, y)	(x) % (y)
 
@@ -31,7 +31,9 @@ static int FC_syndrome_shift(FC_CTX *ctx, unsigned int bit);
 static int
 outit(int *data, int len)
 {
-	for (int i = 0; i < len; i++)
+	int i;
+
+	for (i = 0; i < len; i++)
 		printf("%d ", data[i]);
 	printf("\n");
 }
@@ -49,23 +51,21 @@ FC_init(FC_CTX *ctx, unsigned int crc_size, unsigned int data_size)
 int
 FC_check_crc(FC_CTX *ctx, unsigned char *input_bits, unsigned char *control_data)
 { 
-    int j,error_count = 0, error_index = 0, success_flag = 0, syn_index = 0;
+	int j,error_count = 0, error_index = 0, success_flag = 0, syn_index = 0;
+	unsigned int i;
 
-    ctx->syn_start = 0;
-    // reset the syndrome register
+	ctx->syn_start = 0;
+	// reset the syndrome register
 	memset(ctx->syndrome_reg, 0, sizeof ctx->syndrome_reg);
- //   d_syndrome_reg.clear();
-    //d_syndrome_reg.insert(d_syndrome_reg.begin(),40,0);
 
-    // shift in the data bits
-    //for (unsigned int i=0; i < 1; i++) {
-    for (unsigned int i=0; i < ctx->data_size; i++) {
+	// shift in the data bits
+    for (i=0; i < ctx->data_size; i++) {
         error_count = FC_syndrome_shift(ctx, input_bits[i]);
         control_data[i] = input_bits[i];
     }
 
     // shift in the crc bits
-    for (unsigned int i=0; i < ctx->crc_size; i++) {
+    for (i=0; i < ctx->crc_size; i++) {
         error_count = FC_syndrome_shift(ctx, 1-input_bits[i+ctx->data_size]);
     }
 
@@ -125,6 +125,7 @@ static int
 FC_syndrome_shift(FC_CTX *ctx, unsigned int bit)
 {
 	int error_count = 0;
+	unsigned int i;
 
 	if (ctx->syn_start == 0)
 		ctx->syn_start = 39;
@@ -134,8 +135,6 @@ FC_syndrome_shift(FC_CTX *ctx, unsigned int bit)
 
 	memcpy(temp_syndrome_reg, ctx->syndrome_reg, sizeof temp_syndrome_reg);
 
-    //std::vector<int> temp_syndrome_reg = ctx->syndrome_reg;
-
     temp_syndrome_reg[REM(ctx->syn_start+3,40)] = 
                        ctx->syndrome_reg[REM(ctx->syn_start+3,40)] ^
                        ctx->syndrome_reg[ctx->syn_start];
@@ -170,7 +169,7 @@ FC_syndrome_shift(FC_CTX *ctx, unsigned int bit)
 
 	memcpy(ctx->syndrome_reg, temp_syndrome_reg, sizeof ctx->syndrome_reg);
 
-    for (unsigned int i = 0; i < 28; i++) {
+    for (i = 0; i < 28; i++) {
        error_count = error_count + ctx->syndrome_reg[REM(ctx->syn_start+i,40)];
     }
     return error_count;
diff --git a/gsm-tvoid/src/lib/fire_crc.h b/gsm-tvoid/src/lib/fire_crc.h
index 91cdee3..15d5b81 100644
--- a/gsm-tvoid/src/lib/fire_crc.h
+++ b/gsm-tvoid/src/lib/fire_crc.h
@@ -24,6 +24,10 @@
 #ifndef INCLUDED_FIRE_CRC_H
 #define INCLUDED_FIRE_CRC_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef struct
 {
 	unsigned int crc_size;
@@ -35,31 +39,8 @@ typedef struct
 int FC_init(FC_CTX *ctx, unsigned int crc_size, unsigned int data_size);
 int FC_check_crc(FC_CTX *ctx, unsigned char *input_bits, unsigned char *control_data);
 
-#if 0
-/*!
- * \brief 
- * \ingroup 
- */
-
-class fire_crc 
-{
-protected:
- 
-  unsigned int d_crc_size;
-  unsigned int d_data_size;
-  unsigned int d_syn_start;
-  std::vector<int> d_syndrome_reg;
-
-public:
-
-  fire_crc (unsigned int crc_size, unsigned int data_size);
-  ~fire_crc (); 
-  int check_crc (const std::vector<int> &input_bits,
-	         std::vector<int> &control_bits);
-  int syndrome_shift (unsigned int bit);
-  int rem (const int x, const int y);
-  
-};
+#ifdef __cplusplus
+}
 #endif
 
 #endif
-- 
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