From cd20b208d0317ae25ecc864c321f0488301ac4c8 Mon Sep 17 00:00:00 2001
From: iceman1001 <iceman@iuse.se>
Date: Mon, 2 Nov 2020 19:07:03 +0100
Subject: [PATCH] bigbuf calloc ftc where the memory is set to zero before

---
 armsrc/BigBuf.c | 10 ++++++++++
 armsrc/BigBuf.h |  3 +--
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/armsrc/BigBuf.c b/armsrc/BigBuf.c
index c7c370047..80104156d 100644
--- a/armsrc/BigBuf.c
+++ b/armsrc/BigBuf.c
@@ -129,6 +129,16 @@ uint8_t *BigBuf_malloc(uint16_t chunksize) {
     return (uint8_t *)BigBuf + s_bigbuf_hi;
 }
 
+// allocate a chunk of memory from BigBuf, and returns a pointer to it. 
+// sets the memory to zero
+uint8_t *BigBuf_calloc(uint16_t chunksize) {
+    uint8_t *mem = BigBuf_malloc(chunksize);
+    if (mem != NULL) {
+        memset(mem, 0x00, chunksize);
+    }
+    return mem;    
+}
+
 // free ALL allocated chunks. The whole BigBuf is available for traces or samples again.
 void BigBuf_free(void) {
     s_bigbuf_hi = s_bigbuf_size;
diff --git a/armsrc/BigBuf.h b/armsrc/BigBuf.h
index bf6600e1e..ff444f3c8 100644
--- a/armsrc/BigBuf.h
+++ b/armsrc/BigBuf.h
@@ -34,6 +34,7 @@ void BigBuf_Clear_ext(bool verbose);
 void BigBuf_Clear_keep_EM(void);
 void BigBuf_Clear_EM(void);
 uint8_t *BigBuf_malloc(uint16_t);
+uint8_t *BigBuf_calloc(uint16_t);
 void BigBuf_free(void);
 void BigBuf_free_keep_EM(void);
 void BigBuf_print_status(void);
@@ -46,10 +47,8 @@ bool get_tracing(void);
 bool RAMFUNC LogTrace(const uint8_t *btBytes, uint16_t iLen, uint32_t timestamp_start, uint32_t timestamp_end, uint8_t *parity, bool readerToTag);
 bool LogTrace_ISO15693(const uint8_t *bytes, uint16_t len, uint32_t ts_start, uint32_t ts_end, uint8_t *parity, bool reader2tag);
 
-
 uint8_t emlSet(uint8_t *data, uint32_t offset, uint32_t length);
 
-
 typedef struct {
     int max;
     int bit;