Implement built-in MEM command

ci_prereq.sh

@@ -5,6 +5,20 @@ sudo apt install -y \
   devscripts \
   equivs
 
-sudo add-apt-repository ppa:stsp-0/thunk-gen
-sudo add-apt-repository ppa:stsp-0/dj64
+add_ppa() {
+  PPA="$1"
+  for i in 1 2 3 4 5 6 7 8 9 10; do
+    echo "Adding $PPA (attempt $i)..."
+    if sudo add-apt-repository -y "$PPA"; then
+      return 0
+    fi
+    sleep 8
+  done
+  return 1
+}
+
+add_ppa ppa:stsp-0/thunk-gen
+add_ppa ppa:stsp-0/dj64
+
+sudo apt update
 mk-build-deps --install --root-cmd sudo

ci_test_prereq.sh

@@ -1,6 +1,18 @@
 #!/bin/sh
 
-sudo add-apt-repository ppa:dosemu2/ppa
+add_ppa() {
+  PPA="$1"
+  for i in 1 2 3 4 5 6 7 8 9 10; do
+    echo "Adding $PPA (attempt $i)..."
+    if sudo add-apt-repository -y "$PPA"; then
+      return 0
+    fi
+    sleep 8
+  done
+  return 1
+}
+
+add_ppa ppa:dosemu2/ppa
 
 sudo apt update -q
 

djgpp/makefile

@@ -12,7 +12,7 @@ C_OPT = -Wall -O2 -Wmissing-declarations -Wwrite-strings -I $(SRCDIR) -I . \
 # avoid CMOVxx instructions
 C_OPT += -march=i386
 LINK_OPT =
-SRCS = $(SRCDIR)/command.c $(SRCDIR)/cmdbuf.c $(SRCDIR)/ms.c $(SRCDIR)/djterm.c \
+SRCS = $(SRCDIR)/command.c $(SRCDIR)/cmdbuf.c $(SRCDIR)/ms.c $(SRCDIR)/djterm.c $(SRCDIR)/mem.c \
   $(SRCDIR)/env.c $(SRCDIR)/psp.c $(SRCDIR)/umb.c $(SRCDIR)/ae0x.c \
    $(SRCDIR)/compl.c $(SRCDIR)/clip.c memmem.c fmemcpy.c findclos.c
 ASSRCS = $(SRCDIR)/asm.S $(SRCDIR)/int23.S $(SRCDIR)/int0.S $(SRCDIR)/int75.S \

src/command.c

@@ -97,6 +97,7 @@
 #include "ae0x.h"
 #include "compl.h"
 #include "clip.h"
+#include "mem.h"
 #include "command.h"
 
 /*
@@ -305,6 +306,7 @@ struct built_in_cmd cmd_table[] =
     {"loadhigh", perform_loadhigh, "", "load program to UMB"},
     {"md", perform_md, "", "create directory"},
     {"mkdir", perform_md, "", "create directory"},
+    {"mem", perform_mem, "", "display memory statistics"},
     {"move", perform_move, "", "move file"},
     {"more", perform_more, "", "scroll-pause long output"},
     {"mouseopt", perform_mouseopt, "", "mouse options"},

src/makefile.inc

@@ -16,10 +16,10 @@ DJCFLAGS = -Wall -O2 -Wmissing-declarations -Wwrite-strings \
 DJCPPFLAGS += -I. -I$(srcdir) -DCOMCOM_VERSION=\"$(VERSION)\"
 DJASFLAGS += -I. -I$(srcdir)
 DJASCPPFLAGS += -I. -I$(srcdir)
-SOURCES = command.c cmdbuf.c mouse.c env.c psp.c umb.c ae0x.c compl.c clip.c \
+SOURCES = command.c cmdbuf.c mouse.c env.c psp.c umb.c ae0x.c compl.c clip.c mem.c \
   djterm.c thunks_a.c thunks_c.c
 HEADERS = $(addprefix $(srcdir)/,ae0x.h cmdbuf.h compl.h psp.h command.h env.h mouse.h umb.h \
-  glob_asm.h asm.h)
+  mem.h glob_asm.h asm.h)
 PDHDR = $(srcdir)/asm.h
 GLOB_ASM = $(srcdir)/glob_asm.h
 OBJECTS = $(SOURCES:.c=.o)