# HG changeset patch
# User Mychaela Falconia <falcon@freecalypso.org>
# Date 1727235196 0
# Node ID 4681ad8483d69482343018c6b5b1f2e603c045d0
# Parent  4189abdfeaa47f49c9a40b363806ff3fa2de106a
d144: edata-input-compile program written

diff -r 4189abdfeaa4 -r 4681ad8483d6 .hgignore
--- a/.hgignore	Wed Sep 25 02:36:08 2024 +0000
+++ b/.hgignore	Wed Sep 25 03:33:16 2024 +0000
@@ -2,6 +2,8 @@
 
 \.[oa]$
 
+^d144/edata-input-compile$
+
 ^tfo/find-is-hdr$
 ^tfo/tfo-trace-msg$
 
diff -r 4189abdfeaa4 -r 4681ad8483d6 d144/Makefile
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/d144/Makefile	Wed Sep 25 03:33:16 2024 +0000
@@ -0,0 +1,11 @@
+CC=	gcc
+CFLAGS=	-O2
+PROGS=	edata-input-compile
+
+all:	${PROGS}
+
+edata-input-compile:	edata-input-compile.c
+	${CC} ${CFLAGS} -o $@ $@.c
+
+clean:
+	rm -f *.o ${PROGS}
diff -r 4189abdfeaa4 -r 4681ad8483d6 d144/edata-input-compile.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/d144/edata-input-compile.c	Wed Sep 25 03:33:16 2024 +0000
@@ -0,0 +1,210 @@
+/*
+ * This program compiles E-data input from our handcrafting format
+ * into the binary format that will be read by itt-ater-16.
+ */
+
+#include <sys/types.h>
+#include <ctype.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+
+#define	MAX_FIELDS	8
+
+static char *infname, *outfname;
+static FILE *inf, *outf;
+
+static int lineno;
+static char linebuf[256];
+static char *fields[MAX_FIELDS];
+static unsigned nfields;
+
+static uint8_t frame_nibbles[72];
+static unsigned subframe_count;
+
+static int
+get_line()
+{
+	char *cp;
+
+	if (!fgets(linebuf, sizeof linebuf, inf))
+		return 1;
+	lineno++;
+	if (!index(linebuf, '\n')) {
+		fprintf(stderr, "%s line %d: too long or missing newline\n",
+			infname, lineno);
+		exit(1);
+	}
+	nfields = 0;
+	for (cp = linebuf; ; ) {
+		while (isspace(*cp))
+			cp++;
+		if (*cp == '\0' || *cp == '#')
+			break;
+		if (nfields >= MAX_FIELDS) {
+			fprintf(stderr, "%s line %d: too many fields\n",
+				infname, lineno);
+			exit(1);
+		}
+		fields[nfields++] = cp;
+		while (*cp && !isspace(*cp))
+			cp++;
+		if (*cp)
+			*cp++ = '\0';
+	}
+	return 0;
+}
+
+static int
+get_line_nonempty()
+{
+	int rc;
+
+	for (;;) {
+		rc = get_line();
+		if (rc)
+			return rc;
+		if (nfields)
+			return 0;
+	}
+}
+
+static int
+decode_hex_digit(c)
+{
+	if (isdigit(c))
+		return c - '0';
+	else if (isupper(c))
+		return c - 'A' + 10;
+	else
+		return c - 'a' + 10;
+}
+
+static void
+bits_line()
+{
+	uint8_t *op;
+	char *cp;
+	unsigned n;
+
+	if (nfields != 2) {
+		fprintf(stderr, "%s line %d: bits command takes one argument\n",
+			infname, lineno);
+		exit(1);
+	}
+	if (strlen(fields[1]) != 9) {
+		fprintf(stderr, "%s line %d: bits argument has wrong length\n",
+			infname, lineno);
+		exit(1);
+	}
+	if (subframe_count >= 8) {
+		fprintf(stderr,
+		"%s line %d: 8 subframes already given, can't have more\n",
+			infname, lineno);
+		exit(1);
+	}
+	op = frame_nibbles + subframe_count * 9;
+	cp = fields[1];
+	for (n = 0; n < 9; n++) {
+		if (!isxdigit(*cp)) {
+			fprintf(stderr,
+				"%s line %d: bits argument is not valid hex\n",
+				infname, lineno);
+			exit(1);
+		}
+		*op++ = decode_hex_digit(*cp++);
+	}
+	subframe_count++;
+}
+
+static void
+frame_line()
+{
+	uint8_t bin[38], m_bits[2];
+	unsigned n, i;
+
+	if (nfields != 2) {
+		fprintf(stderr,
+			"%s line %d: frame command takes one argument\n",
+			infname, lineno);
+		exit(1);
+	}
+	for (n = 0; n < 2; n++) {
+		switch (fields[1][n]) {
+		case '0':
+			m_bits[n] = 0;
+			break;
+		case '1':
+			m_bits[n] = 1;
+			break;
+		default:
+		bad_arg:
+			fprintf(stderr,
+				"%s line %d: invalid M-bits argument \"%s\"\n",
+				infname, lineno, fields[1]);
+			exit(1);
+		}
+	}
+	if (fields[1][2])
+		goto bad_arg;
+
+	if (subframe_count != 8) {
+		fprintf(stderr,
+			"%s line %d: not preceded by exactly 8 subframes\n",
+			infname, lineno);
+		exit(1);
+	}
+	bin[0] = 0xD4;
+	bin[1] = (m_bits[0] << 1) | m_bits[1];
+	i = 0;
+	for (n = 0; n < 36; n++) {
+		bin[n+2] = (frame_nibbles[i] << 4) | frame_nibbles[i+1];
+		i += 2;
+	}
+	fwrite(bin, 1, 38, outf);
+
+	subframe_count = 0;
+}
+
+main(argc, argv)
+	char **argv;
+{
+	int rc;
+
+	if (argc != 3) {
+		fprintf(stderr, "usage: %s input.src output.bin\n", argv[0]);
+		exit(1);
+	}
+	infname = argv[1];
+	outfname = argv[2];
+
+	inf = fopen(infname, "r");
+	if (!inf) {
+		perror(infname);
+		exit(1);
+	}
+	outf = fopen(outfname, "w");
+	if (!outf) {
+		perror(outfname);
+		exit(1);
+	}
+
+	for (;;) {
+		rc = get_line_nonempty();
+		if (rc)
+			break;
+		if (!strcasecmp(fields[0], "bits"))
+			bits_line();
+		else if (!strcasecmp(fields[0], "frame"))
+			frame_line();
+		else {
+			fprintf(stderr,
+				"%s line %d: non-understood keyword \"%s\"\n",
+				infname, lineno, fields[0]);
+			exit(1);
+		}
+	}
+	exit(0);
+}