Fixing clang compilation warning

[proxmark3-svn] / client / cmdhflegic.c

diff --git a/client/cmdhflegic.c b/client/cmdhflegic.c
index 838a41a25697b26619f73041008964933abae768..ccdfa1da2675d1f73017cf4b0f332229741bea4f 100644 (file)
--- a/client/cmdhflegic.c
+++ b/client/cmdhflegic.c
@@ -14,32 +14,36 @@ static int CmdHelp(const char *Cmd);
 int usage_legic_calccrc8(void){
        PrintAndLog("Calculates the legic crc8/crc16 on the input hexbytes.");
        PrintAndLog("There must be an even number of hexsymbols as input.");
-       PrintAndLog("Usage:  hf legic crc8 [h] b <hexbytes> u <uidcrc>");
-       PrintAndLog("Options :");
+       PrintAndLog("Usage:  hf legic crc8 [h] b <hexbytes> u <uidcrc> c <crc type>");
+       PrintAndLog("Options:");
        PrintAndLog("      b <hexbytes>  : hex bytes");
        PrintAndLog("      u <uidcrc>    : MCC hexbyte");
+       PrintAndLog("      c <crc type>  : 8|16 bit crc size");
        PrintAndLog("");
-       PrintAndLog("Samples :");
+       PrintAndLog("Samples:");
        PrintAndLog("      hf legic crc8 b deadbeef1122");
-       PrintAndLog("      hf legic crc8 b deadbeef1122 u 9A");
+       PrintAndLog("      hf legic crc8 b deadbeef1122 u 9A c 16");
        return 0;
 }
 
 int usage_legic_load(void){
        PrintAndLog("It loads datasamples from the file `filename` to device memory");
        PrintAndLog("Usage:  hf legic load <file name>");
-       PrintAndLog(" sample: hf legic load filename");
+       PrintAndLog("");
+       PrintAndLog("Samples:");
+       PrintAndLog("      hf legic load filename");
        return 0;
 }
 
 int usage_legic_read(void){    
        PrintAndLog("Read data from a legic tag.");
        PrintAndLog("Usage:  hf legic read <offset> <num of bytes>");
-       PrintAndLog("Options :");
+       PrintAndLog("Options:");
        PrintAndLog("  <offset>        : offset in data array to start download from");
        PrintAndLog("  <num of bytes>  : number of bytes to download");
        PrintAndLog("");
-       PrintAndLog(" sample: hf legic read");
+       PrintAndLog("Samples:");
+       PrintAndLog("      hf legic read");
        return 0;
 }
 
@@ -563,7 +567,7 @@ int CmdLegicRfFill(const char *Cmd) {
 
 int CmdLegicCalcCrc8(const char *Cmd){
 
-       uint8_t *data;
+       uint8_t *data = NULL;
        uint8_t cmdp = 0, uidcrc = 0, type=0;
        bool errors = false;
        int len = 0;
@@ -621,7 +625,7 @@ int CmdLegicCalcCrc8(const char *Cmd){
                        break;
        }
        
-       free(data);
+       if (data != NULL) free(data);
        return 0;
 }