# HG changeset patch
# User Mychaela Falconia <falcon@freecalypso.org>
# Date 1583383735 0
# Node ID f9482000b8388e86706f5e69342a9f27f96ba54a
# Parent  4e1d7ce0ee71ba4b7aca9c4b7af7448bca1d159a
frbl/reconst/convert.c: almost perfect reconstruction

diff -r 4e1d7ce0ee71 -r f9482000b838 frbl/reconst/Makefile
--- a/frbl/reconst/Makefile	Thu Mar 05 00:27:22 2020 +0000
+++ b/frbl/reconst/Makefile	Thu Mar 05 04:48:55 2020 +0000
@@ -1,8 +1,9 @@
 CFLAGS=	-mn -mt -mw -me -pw2
 CPPFLAGS=-DTOOL_CHOICE=0 -D_TMS470 -I. -Iinc
-OBJS=	boot.disasm
+OBJS=	boot.obj convert.obj
+DISASM=	boot.disasm convert.disasm
 
-all:	${OBJS}
+all:	${OBJS} ${DISASM}
 
 %.obj:	%.c
 	./cl470 -q -c ${CFLAGS} ${CPPFLAGS} $<
diff -r 4e1d7ce0ee71 -r f9482000b838 frbl/reconst/convert.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/frbl/reconst/convert.c	Thu Mar 05 04:48:55 2020 +0000
@@ -0,0 +1,106 @@
+#include "main/sys_types.h"
+#include "convert.h"
+
+static SYS_UWORD8 *bss_0;
+static SYS_UWORD32 bss_4;
+static SYS_UWORD16 bss_8;
+static SYS_UWORD8 bss_0xa;
+static SYS_UWORD32 bss_0xc;
+
+long
+con_get_command_from_string(SYS_UWORD8 byte_to_analyze, SYS_UWORD8 *command)
+{
+	long sp8 = 0;
+
+	switch (bss_4) {
+	case 0:
+		/* 0x10 */
+		if (byte_to_analyze == 0xAA) {
+			/* 0x18 */
+			bss_0xc = (bss_0xc + 1) & 1;
+		} else {
+			/* 0x26 */
+			if (bss_0xc == 0)
+				return (sp8);
+			bss_0 = command + 1;
+			bss_0xa = 0;
+			bss_8 = byte_to_analyze;
+			bss_0xc = 0;
+			bss_4 = 1;
+		}
+		return (sp8);
+	case 1:
+		/* 0x52 */
+		if (byte_to_analyze == 0xAA) {
+			/* 0x5a */
+			if (bss_0xc) {
+				/* 0x62 */
+				*bss_0++ = byte_to_analyze;
+				bss_0xa++;
+				bss_0xc = 0;
+			} else {
+				/* 0x7a */
+				bss_0xc = 1;
+			}
+		} else {
+			/* 0x82 */
+			if (bss_0xc) {
+				/* 0x8a */
+				bss_0 = command + 1;
+				bss_0xa = 0;
+				bss_8 = byte_to_analyze + 1;
+				bss_0xc = 0;
+			} else {
+				/* 0xa6 */
+				*bss_0++ = byte_to_analyze;
+				bss_0xa++;
+			}
+		}
+		/* 0xbc */
+		bss_8--;
+		if (bss_8)
+			return (sp8);
+		*command = bss_0xa;
+		sp8 = 1;
+		bss_4 = 0;
+		bss_0xc = 0;
+		/* FLUID hack */
+		if (command[0] == 0x01 && command[1] == 0xDD)
+			fluid_bootloader();
+		/* end FLUID hack */
+		return (sp8);
+	}
+	return (sp8);
+}
+
+void
+con_build_string_from_command(SYS_UWORD8 *command, SYS_UWORD8 *string,
+				SYS_UWORD16 *string_length)
+{
+	SYS_UWORD16 sp12;
+	SYS_UWORD8 *sp16;
+	SYS_UWORD8 *sp20;
+
+	sp16 = string + 1;
+	sp20 = command++;
+	*string = 0xAA;
+	string += 2;
+	*string_length = 0;
+	for (sp12 = 0; sp12 < *sp20; sp12++) {
+		if (*command == 0xAA) {
+			*string++ = 0xAA;
+			*string_length += 1;
+		}
+		*string++ = *command++;
+		*string_length += 1;
+	}
+	*sp16 = *string_length;
+	*string_length += 2;
+}
+
+void
+con_initialize_conversion(void)
+{
+	bss_4 = 0;
+	bss_0xc = 0;
+}