refactor: c/ -> usr/, compiled program blobs out of the source tree

Userland sources live in usr/ (fits the Unix theme better than 'c').
SDCC output .bin blobs land in build/usr/ with the other build artifacts
instead of littering the source dir; programs.asm INCBINs them from there.
Byte-identical ROM.

1 files changed, 0 insertions, 61 deletions

diff --git a/c/ping.c b/c/ping.c
deleted file mode 100644
index 8671318..0000000
--- a/c/ping.c
+++ /dev/null
@@ -1,61 +0,0 @@
-#include "resolve.h"
-/* ping HOST|IP - originate ICMP echo requests via the kernel socket layer.
-   Resolves a hostname via DNS first (resolve.h); default target 10.0.0.1. No
-   SLIP/IP/checksums here - the kernel owns all of that. */
-
-/* rbuf is first + large so namebuf/dst land past the arg string at 0xA000 */
-static unsigned char rbuf[96];
-static unsigned char namebuf[64];
-static unsigned char dst[4];
-static unsigned char payload[4];
-
-static void put_ip(unsigned char *ip) {
-    unsigned char i;
-    for (i = 0; i < 4; i++) { putu(ip[i]); if (i < 3) putc('.'); }
-}
-
-/* wait up to ~2s for an echo reply without blocking in the kernel: a lost
-   reply (some hosts rate-limit ICMP) must cost one "timeout" line, not
-   minutes wedged inside net_recv's pump-counted wait. */
-static unsigned char wait_reply(unsigned char s) {
-    unsigned char t, r;
-    for (t = 0; t < 40; t++) {
-        r = net_recv_nb(s, rbuf, (unsigned char)sizeof(rbuf));
-        if (r != 0xFE) return r;       /* reply (or error) */
-        msleep(50);
-    }
-    return 0xFF;                       /* ~2s with no reply */
-}
-
-void main(void) {
-    char *arg;
-    unsigned char s, seq, got = 0, i;
-    arg = getargs();
-    if (!arg || !*arg) { dst[0] = 10; dst[1] = 0; dst[2] = 0; dst[3] = 1; }
-    else {
-        for (i = 0; arg[i] && i < 63; i++) namebuf[i] = (unsigned char)arg[i];
-        namebuf[i] = 0;
-        if (!resolve((char *)namebuf, dst)) {
-            puts("ping: cannot resolve "); puts((char *)namebuf); nl(); sexit(1);
-        }
-    }
-
-    payload[0] = 'g'; payload[1] = 'b'; payload[2] = 'o'; payload[3] = 's';
-    s = net_socket(SOCK_ICMP);
-    if (s == 0xFF) { puts("ping: no socket"); nl(); sexit(1); }
-    net_connect(s, dst, 0);
-
-    puts("PING "); put_ip(dst); nl();
-    for (seq = 1; seq <= 4; seq++) {
-        net_send(s, payload, 4);
-        if (wait_reply(s) != 0xFF) {
-            got++;
-            puts("  reply from "); put_ip(dst); puts(" seq="); putu(seq); nl();
-        } else {
-            puts("  seq="); putu(seq); puts(" timeout"); nl();
-        }
-        if (seq < 4) msleep(800);      /* pace like real ping */
-    }
-    puts("-- "); putu(got); puts("/4 received"); nl();
-    net_close(s);
-}