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authorjaseg <git@jaseg.net>2018-12-20 22:42:17 +0900
committerjaseg <git@jaseg.net>2018-12-20 22:42:17 +0900
commit132fd4f9c0184be033533953cc2c7ae92da311d9 (patch)
tree634c961de6168237d915e459c53fb6d5f1aed8b3 /fw/8b10b_test_encode.c
parent90038f4378b7cdbe98e32ed1e5e3055dbe4776f2 (diff)
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8b10b encoder and decoder working
Tested on all 24-bit inputs after sync and on ~500M of random input with and without intermediate sync
Diffstat (limited to 'fw/8b10b_test_encode.c')
-rw-r--r--fw/8b10b_test_encode.c108
1 files changed, 108 insertions, 0 deletions
diff --git a/fw/8b10b_test_encode.c b/fw/8b10b_test_encode.c
new file mode 100644
index 0000000..2ba75d9
--- /dev/null
+++ b/fw/8b10b_test_encode.c
@@ -0,0 +1,108 @@
+
+#include <stdio.h>
+#include <string.h>
+
+#include "8b10b.h"
+
+static const char * const rc_names[] = {
+ [K28_0] = "K.28.0",
+ [K28_1] = "K.28.1",
+ [K28_2] = "K.28.2",
+ [K28_3] = "K.28.3",
+ [K28_4] = "K.28.4",
+ [K28_5] = "K.28.5",
+ [K28_6] = "K.28.6",
+ [K28_7] = "K.28.7",
+ [K23_7] = "K.23.7",
+ [K27_7] = "K.27.7",
+ [K29_7] = "K.29.7",
+ [K30_7] = "K.30.7",
+};
+
+int hex_to_uint(const char *s, size_t len) {
+ if (len > 7)
+ return -2;
+
+ int acc = 0;
+ for (int i=0; i<len; i++) {
+ int digit = s[i];
+ if ('0' <= digit && digit <= '9')
+ digit -= '0';
+ else if ('a' <= digit && digit <= 'f')
+ digit -= 'a' - 0xa;
+ else if ('A' <= digit && digit <= 'F')
+ digit -= 'A' - 0xA;
+ else return -1;
+ acc = acc << 4 | digit;
+ }
+
+ return acc;
+}
+
+int main(void) {
+ struct state_8b10b_enc st;
+ xfr_8b10b_encode_reset(&st);
+
+ int c;
+ int comment = 0;
+ char parse_buf[32];
+ int parse_buf_pos = 0;
+ while ((c=fgetc(stdin)) != EOF) {
+ if (comment) {
+ if (c == '\n')
+ comment = 0;
+ printf("%c", c);
+ continue;
+ }
+
+ if (c == '#') {
+ comment = 1;
+ printf("%c", c);
+ continue;
+ }
+
+ if (c != '\r' && c != ' ' && c != '\t' && c != '\n') {
+ parse_buf[parse_buf_pos++] = (char)c;
+ if (parse_buf_pos == sizeof(parse_buf)) {
+ parse_buf[sizeof(parse_buf)-1] = '\0';
+ fprintf(stderr, "Parse error: Token \"%s[...]\" too long. Exiting.\n", parse_buf);
+ return 1;
+ }
+ continue;
+ }
+
+ if (parse_buf_pos == 0)
+ continue;
+
+ int data = 0;
+ for (int i=1; i<sizeof(rc_names)/sizeof(rc_names[0]); i++) {
+ if (!strncmp(rc_names[i], parse_buf, parse_buf_pos)) {
+ data = -i;
+ break;
+ }
+ }
+
+ if (!data) {
+ data = hex_to_uint(parse_buf, parse_buf_pos);
+ if (data < 0) {
+ parse_buf[parse_buf_pos] = '\0';
+ fprintf(stderr, "Invalid hex number: \"%s\"\n", parse_buf);
+ return 1;
+ }
+ }
+
+ parse_buf_pos = 0; /* reset for next token */
+
+ int encoded = xfr_8b10b_encode(&st, data);
+ if (encoded < 0) {
+ fprintf(stderr, "Invalid argument error encoding\n");
+ return 2;
+ }
+
+ for (int i=0; i<10; i++)
+ printf("%c", (encoded & (1<<(9-i))) ? '1' : '0');
+
+ printf("%c", c); /* print whitespace character */
+ }
+}
+