#include <string.h>
struct Market {
char ticker[16];
char price[5];
};
void parser(const void **ptr, struct Market arr) {
char ticker[16];
memcpy(arr.price, *ptr, 5);
ptr = ptr 4;
int j = 0;
while (1) {
if (*ptr) {
ticker[j] = *ptr;
j ;
ptr ;
} else {
break;
}
}
strcpy(arr.ticker, ticker);
}
struct Market b;
int main(void) {
char a[20] = {'\xe7', 'h', '7', 'G', '\0','B', 'T', 'C', 'U', 'S', 'D', 'T', '\0'};
parser(a, b);
printf(" %s", b.ticker);
}
How can I parse these binary datas from memory? I'm very novice in c.. Above codes can't compile. It has so many error. I can't use fread, because it's from memory. And Data that i have to parse is like..
b':\x197GBTCUSDT\x00q\x0fOEETHUSDT\x00\x10\xea\xbbCBCHUSDT\x00\x9b\xe6]?XRPUSDT\x00\x92\xb3C@EOSUSDT\x00\xcfP\x03CLTCUSDT\x00\xc2Y\x8e=TRXUSDT\x00Qp?BETCUSDT\x00\n\x95\x87ALINKUSDT\x00\x16\x19n>XLMUSDT\x00\x83\xdd\x97?ADAUSDT\x00\x1d\x82XCXMRUSDT\x00\xa4\xf0\x03CDASHUSDT\x003sLCZECUSDT\x00\xd1={@XTZUSDT\x00\x81\xb6\xd8CBNBUSDT\x00Xk\xf2AATOMUSDT\x00D\xd2%?ONTUSDT\x00Y\x1de?IOTAUSDT\x00\xf5Ji?BATUSDT\x00t\x..
How can I solve this difficult job?
CodePudding user response:
If something hasn't changed C standard has defined that the implementation shall define char to have the same range, representation, and behavior as either signed char or unsigned char .
\xe7
has a decimal value 237 which is more than singed char can hold. Can this work? Another thing, passing a (char*)
to ptr (void**)
, how can that work? Or, I a misunderstand something?