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printdemodbuffer: add option to strip leading zeroes

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This commit is contained in:
Philippe Teuwen 2019-09-12 01:23:43 +02:00
parent 1ad66c917f
commit 22ead8ca0b
1 changed files with 15 additions and 0 deletions
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15
client/cmddata.c
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@ -39,6 +39,7 @@ static int usage_data_printdemodbuf(void) {
PrintAndLogEx(NORMAL, " x output in hex (omit for binary output)");
PrintAndLogEx(NORMAL, " o <offset> enter offset in # of bits");
PrintAndLogEx(NORMAL, " l <length> enter length to print in # of bits or hex characters respectively");
PrintAndLogEx(NORMAL, " s strip leading zeroes, i.e. set offset to first bit equal to one");
return PM3_SUCCESS;
}
static int usage_data_manrawdecode(void) {
@ -402,6 +403,7 @@ void printDemodBuff(void) {
int CmdPrintDemodBuff(const char *Cmd) {
bool hexMode = false;
bool errors = false;
bool lstrip = false;
uint32_t offset = 0;
uint32_t length = 512;
char cmdp = 0;
@ -423,6 +425,10 @@ int CmdPrintDemodBuff(const char *Cmd) {
if (!length) errors = true;
cmdp += 2;
break;
case 's':
lstrip = true;
cmdp ++;
break;
default:
PrintAndLogEx(WARNING, "Unknown parameter '%c'", param_getchar(Cmd, cmdp));
errors = true;
@ -436,6 +442,15 @@ int CmdPrintDemodBuff(const char *Cmd) {
PrintAndLogEx(NORMAL, "Demodbuffer is empty");
return PM3_ESOFT;
}
if (lstrip) {
char *buf = (char *)(DemodBuffer + offset);
length = (length > (DemodBufferLen - offset)) ? DemodBufferLen - offset : length;
uint32_t i;
for (i = 0; i < length; i++) {
if (buf[i] == 1) break;
}
offset += i;
}
length = (length > (DemodBufferLen - offset)) ? DemodBufferLen - offset : length;
if (hexMode) {