From 750dbde18501efb6f9520d378475e3b58aea9ea4 Mon Sep 17 00:00:00 2001
From: Maik Fischer <maikf@qu.cx>
Date: Sat, 28 Oct 2017 12:38:25 +0200
Subject: [PATCH] kasse: allow starting up without a printer

---
 Makefile          |  4 ++--
 include/globals.h | 16 ++++++++++++++++
 include/kasse.h   |  3 ---
 src/globals.c     |  7 +++++++
 src/itemz.c       |  1 +
 src/kasse.c       |  4 +++-
 src/print.c       | 32 ++++++++++++++++++++++++--------
 7 files changed, 53 insertions(+), 14 deletions(-)
 create mode 100644 include/globals.h
 create mode 100644 src/globals.c

diff --git a/Makefile b/Makefile
index 1df105e..de3ca5f 100644
--- a/Makefile
+++ b/Makefile
@@ -23,10 +23,10 @@ include/version.h:
 include/charset_umlauts.h:
 	./util/mkfont assets/umlauts.pbm chars_umlauts > $@
 
-kasse: build/config.o build/kasse.o build/general.o build/credit_manager.o build/c128time.o build/print.o build/vdc_patch_charset.o build/vdc_util.o
+kasse: build/config.o build/kasse.o build/general.o build/credit_manager.o build/c128time.o build/print.o build/vdc_patch_charset.o build/vdc_util.o build/globals.o
 	${LD} -Ln $@.lbl -t c128 $^ -o $@
 
-itemz: build/config.o build/itemz.o build/general.o build/credit_manager.o build/c128time.o build/print.o
+itemz: build/config.o build/itemz.o build/general.o build/credit_manager.o build/c128time.o build/print.o build/globals.o
 	${LD} -Ln $@.lbl -t c128 $^ -o $@
 
 cat: build/general.o build/cat.o
diff --git a/include/globals.h b/include/globals.h
new file mode 100644
index 0000000..00fca09
--- /dev/null
+++ b/include/globals.h
@@ -0,0 +1,16 @@
+#ifndef _GLOBALS_H_
+#define _GLOBALS_H_
+
+#include <stdint.h>
+
+#ifdef _IS_GLOBALS_C
+#define GLOBAL
+#else
+#define GLOBAL extern
+#endif
+
+void init_globals(void);
+
+GLOBAL uint8_t printing;
+
+#endif // _GLOBALS_H_
diff --git a/include/kasse.h b/include/kasse.h
index 93650f3..43a67da 100644
--- a/include/kasse.h
+++ b/include/kasse.h
@@ -3,7 +3,4 @@
 
 void print_the_buffer(void);
 
-#ifdef _IS_KASSE
-BYTE printing = 1;
-#endif
 #endif
diff --git a/src/globals.c b/src/globals.c
new file mode 100644
index 0000000..b759fe0
--- /dev/null
+++ b/src/globals.c
@@ -0,0 +1,7 @@
+#define _IS_GLOBALS_C
+#include "globals.h"
+
+void init_globals(void) {
+  printing = 1;
+  return;
+}
diff --git a/src/itemz.c b/src/itemz.c
index 1606e3d..3f4d749 100644
--- a/src/itemz.c
+++ b/src/itemz.c
@@ -17,6 +17,7 @@
 #include "credit_manager.h"
 #include "version.h"
 #include "vdc_patch_charset.h"
+#include "globals.h"
 
 static void itemz_print_screen(void) {
   BYTE i;
diff --git a/src/kasse.c b/src/kasse.c
index 91b4268..d6ffb48 100644
--- a/src/kasse.c
+++ b/src/kasse.c
@@ -4,7 +4,6 @@
  * See LICENSE for license information
  *
  */
-#define _IS_KASSE
 #include <stdio.h>
 #include <conio.h>
 #include <stdlib.h>
@@ -21,6 +20,7 @@
 #include "print.h"
 #include "version.h"
 #include "vdc_patch_charset.h"
+#include "globals.h"
 // drucker 4 oder 5
 // graphic 4,0,10
 
@@ -355,6 +355,8 @@ int main(void) {
   char *c;
   char *time;
 
+  init_globals();
+
   videomode(VIDEOMODE_80x25);
 
   /* clock CPU at double the speed (a whopping 2 Mhz!) */
diff --git a/src/print.c b/src/print.c
index 665f99f..dee1599 100644
--- a/src/print.c
+++ b/src/print.c
@@ -12,6 +12,7 @@
 #include "general.h"
 #define _IS_PRINT
 #include "print.h"
+#include "globals.h"
 
 /* NOTE: undocumented function which scratches files
    We need to use this function because linking unistd.h
@@ -36,19 +37,34 @@ void init_log(void) {
 }
 
 void print_the_buffer(void) {
-  BYTE c;
+  BYTE status;
+  char *c;
+
+  if (!printing)
+    return;
+
 RETRY:
-  c = cbm_open((BYTE)4, (BYTE)4, (BYTE)0, NULL);
-  if (c != 0) {
-    c128_perror(c, "cbm_open(printer)");
-    if (retry_or_quit() == 'q')
+  status = cbm_open((BYTE)4, (BYTE)4, (BYTE)0, NULL);
+  if (status != 0) {
+    c128_perror(status, "cbm_open(printer)");
+
+    do {
+      cprintf("\r\nr)etry, c)ontinue or q)uit?\r\n");
+      c = get_input();
+    } while ((*c != 'r') && (*c != 'c') && (*c != 'q'));
+
+    if (*c == 'q')
       exit(1);
+    else if (*c == 'c') {
+      printing = 0;
+      return;
+    }
 
     goto RETRY;
   }
-  c = cbm_write((BYTE)4, print_buffer, strlen(print_buffer));
-  if (c != strlen(print_buffer)) {
-    c128_perror(c, "write(printer)");
+  status = cbm_write((BYTE)4, print_buffer, strlen(print_buffer));
+  if (status != strlen(print_buffer)) {
+    c128_perror(status, "write(printer)");
     if (retry_or_quit() == 'q')
       exit(1);
     goto RETRY;
-- 
2.39.2