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Code Issues Releases Wiki Activity

tools/blkup: add shortcut for zero blocks

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This commit is contained in:
Virgil Dupras 2020-12-17 20:19:12 -05:00
parent da72d7bbe1
commit efa2556c82
1 changed files with 32 additions and 17 deletions
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15
tools/blkup.c
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@ -3,6 +3,7 @@
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <stdbool.h>
#include "common.h"
@ -30,9 +31,22 @@ int main(int argc, char **argv)
char s[0x40];
char buf[1024] = {0};
sendcmdp(fd, ": _ 1024 0 DO KEY DUP .x I BLK( + C! LOOP ;");
sendcmdp(fd, ": Z BLK( 1024 0 FILL ;");
int returncode = 0;
while (fread(buf, 1, 1024, fp)) {
bool allzero = true;
for (int i=0; i<1024; i++) {
if (buf[i] != 0) {
allzero = false;
break;
}
}
if (allzero) {
sendcmdp(fd, "Z");
putchar('Z');
fflush(stdout);
} else {
sendcmd(fd, "_");
for (int i=0; i<1024; i++) {
putchar('.');
@ -53,6 +67,7 @@ int main(int argc, char **argv)
readprompt(fd);
if (returncode) break;
memset(buf, 0, 1024);
}
sprintf(s, "%d BLK> ! BLK!", blkno);
sendcmdp(fd, s);
blkno++;