Fix printdemodbuffer length tests + add length...

[proxmark3-svn] / client / util.c

diff --git a/client/util.c b/client/util.c
index 056b5676016bdbbd95ed8dec5497ec7967f0a58c..35af3d668e8edad7af2364b38b8b67358306b753 100644 (file)
--- a/client/util.c
+++ b/client/util.c
@@ -9,11 +9,13 @@
 //-----------------------------------------------------------------------------
 
 #include "util.h"
+#define MAX_BIN_BREAK_LENGTH   (3072+384+1)
 
 #ifndef _WIN32
 #include <termios.h>
 #include <sys/ioctl.h> 
 
+
 int ukbhit(void)
 {
   int cnt = 0;
@@ -123,16 +125,25 @@ char *sprint_hex(const uint8_t *data, const size_t len) {
 }
 
 char *sprint_bin_break(const uint8_t *data, const size_t len, const uint8_t breaks) {
-       
-       int maxLen = ( len > 1020) ? 1020 : len;
-       static char buf[1024];
-       memset(buf, 0x00, 1024);
+       // make sure we don't go beyond our char array memory
+       int max_len = ( len+(len/breaks) > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len+(len/breaks);
+       static char buf[MAX_BIN_BREAK_LENGTH]; // 3072 + end of line characters if broken at 8 bits
+       //clear memory
+       memset(buf, 0x00, sizeof(buf));
        char *tmp = buf;
 
-       for (size_t i=0; i < maxLen; ++i){
-               sprintf(tmp++, "%u", data[i]);
-               if (breaks > 0 && !((i+1) % breaks))
+       size_t in_index = 0;
+       // loop through the out_index to make sure we don't go too far
+       for (size_t out_index=0; out_index < max_len; out_index++) {
+               // set character
+               sprintf(tmp++, "%u", data[in_index]);
+               // check if a line break is needed
+               if ( (breaks > 0) && !((in_index+1) % breaks) && (out_index+1 != max_len) ) {
+                       // increment and print line break
+                       out_index++;
                        sprintf(tmp++, "%s","\n");
+               }
+               in_index++;
        }
 
        return buf;