Fix regression on key command input for M-^X and ^X^X.

.gitignore

@@ -1,2 +1,4 @@
-em
+depend.mak
+ue
 *.o
+*.exe

Makefile

@@ -1,5 +1,5 @@
-# Makefile -- uEMACS
+# Makefile -- µEMACS
-# Copyright (c) 2014-2021 Renaud Fivet
+# Copyright © 2013-2021 Renaud Fivet
 
 # Make the build silent by default
 V =
@@ -25,7 +25,7 @@ WARNINGS=-pedantic -Wall -Wextra -Wstrict-prototypes -Wno-unused-parameter
 CFLAGS=-O2 $(WARNINGS)
 LDFLAGS=-s
 LIBS=-lcurses
-DEFINES=-DAUTOCONF -DPROGRAM=$(PROGRAM)
+DEFINES=-DAUTOCONF -DPROGRAM=$(PROGRAM) # -DNDEBUG
 ifeq ($(uname_S),Linux)
  DEFINES += -DPOSIX -DUSG
 else ifeq ($(uname_S),CYGWIN)
@@ -38,18 +38,6 @@ else
  $(error $(uname_S) needs configuration)
 endif
 
-#ifeq ($(uname_S),FreeBSD)
-# DEFINES=-DAUTOCONF -DPOSIX -DSYSV -D_FREEBSD_C_SOURCE -D_BSD_SOURCE -D_SVID_SOURCE -D_XOPEN_SOURCE=600
-#endif
-#ifeq ($(uname_S),Darwin)
-# DEFINES=-DAUTOCONF -DPOSIX -DSYSV -D_DARWIN_C_SOURCE -D_BSD_SOURCE -D_SVID_SOURCE -D_XOPEN_SOURCE=600
-#endif
-
-#LIBS=-ltermcap			# BSD
-#LIBS=-lcurses			# SYSV
-#LIBS=-ltermlib
-#LIBS=-L/usr/lib/termcap -ltermcap
-LFLAGS=-hbx
 BINDIR=/usr/bin
 LIBDIR=/usr/lib
 
@@ -60,15 +48,9 @@ $(PROGRAM): $(OBJS)
 	$(E) "  LINK    " $@
 	$(Q) $(CC) $(LDFLAGS) -o $@ $(OBJS) $(LIBS)
 
-SPARSE=sparse
-SPARSE_FLAGS=-D__LITTLE_ENDIAN__ -D__x86_64__ -D__linux__ -D__unix__
-
-sparse:
-	$(SPARSE) $(SPARSE_FLAGS) $(DEFINES) $(SRCS)
-
 clean:
 	$(E) "  CLEAN"
-	$(Q) rm -f $(PROGRAM) core lintout makeout tags *.o
+	$(Q) rm -f $(PROGRAM) depend.mak *.o
 
 install: $(PROGRAM)
 	strip $(PROGRAM)
@@ -78,22 +60,6 @@ install: $(PROGRAM)
 	chmod 755 ${BINDIR}/$(PROGRAM)
 	chmod 644 ${LIBDIR}/emacs.hlp ${LIBDIR}/.emacsrc
 
-lint:	${SRC}
-	@rm -f lintout
-	lint ${LFLAGS} ${SRC} >lintout
-	cat lintout
-
-splint:
-	splint -weak $(DEFINES) $(SRCS) -booltype boolean -booltrue TRUE -boolfalse FALSE +posixlib +matchanyintegral
-
-errs:
-	@rm -f makeout
-	make $(PROGRAM) >makeout 2>&1
-
-tags:	${SRC}
-	@rm -f tags
-	ctags ${SRC}
-
 .c.o:
 	$(E) "  CC      " $@
 	$(Q) ${CC} ${CFLAGS} ${DEFINES} -c $*.c

bind.c

@@ -448,22 +448,19 @@ static const char *getfname( unsigned keycode, const char *failmsg) {
  *  String key name TO Command Key
  *
  * char *keyname;   name of key to translate to Command key form
- * fmt: [M-][^X][^][FN]X
+ * fmt: [M-|^X][^][FN]X
  * returns ~0 on invalid sequence
  */
 static unsigned int stock( char *keyname) {
 /* parse it up */
     unsigned c = 0 ;
 
-/* first, the META prefix */
+/* first, the prefix META or ^X */
     if( *keyname == 'M' && keyname[ 1] == '-') {
         c = META ;
         keyname += 2 ;
-    }
+    } else if( *keyname == '^' && keyname[ 1] == 'X') {
-
+        c = CTLX ;
-/* control-x prefix */
-    if( *keyname == '^' && keyname[ 1] == 'X') {
-        c |= CTLX ;
         keyname += 2 ;
     }
 
@@ -487,10 +484,9 @@ static unsigned int stock( char *keyname) {
     if( *keyname < 32 || *keyname == 0x7F) {
         c |= CTRL ;
         *keyname ^= 0x40 ;
-    }
+    } else	if( c && !(c & SPEC)
-
+			&&	*keyname >= 'a' && *keyname <= 'z')
-/* make sure we are not lower case (not with function keys) */
+	/* make sure we are not lower case (not with function keys) */
-    if( *keyname >= 'a' && *keyname <= 'z' && !(c & SPEC))
         *keyname -= 32 ;
 
 /* the final sequence... */

input.c

@@ -371,11 +371,10 @@ int get1key( void) {
 }
 
 /* GETCMD: Get a command from the keyboard.  Process all applicable prefix
-   keys.  Handle alted and controlled FNx, not shifted.  Allow double
+   keys.  Handle alted and controlled FNx, not shifted.
-   prefix M-^X.
 */
 int getcmd( void) {
-	int cmask = 0 ;				/* prefixes M- & ^X */
+	int prefix = 0 ;			/* prefixes M- or ^X */
 	int keyread[ STACKSIZE] ;	/* room to process sequences like ^[[24;2~ */
 	int *kptr = keyread ;
 	int c ;
@@ -390,7 +389,7 @@ int getcmd( void) {
 			if( c == 'O') {	/* F1 .. F4 */
 				c = *(kptr++) = get1key() ;
 				if( c >= 'P' && c <= 'S')
-					return c | SPEC | cmask ;
+					return c | SPEC | prefix ;
 			} else if( c == '[') {
 				int v1, v ;		/* ^[[v1;v~ or ^[[v~ */
 
@@ -398,14 +397,17 @@ int getcmd( void) {
 				v1 = v = 0 ;
 				while( kptr < &keyread[ STACKSIZE]) {
 					c = *(kptr++) = get1key() ;
-					if( (c == '~') || (c >= 'A' && c <= 'Z')) {
+					if( (c == '~')
+					||	(c >= 'A' && c <= 'Z')
+					||	(c >= 'a' && c <= 'z')) {
 					/* Found end of sequence */
+						int mask = prefix ;
 						if( v1) {	/* Handle ALT/CTL, not SHFT */
-							if( (v - 1) & 4)
-								cmask |= CTRL ;
-
 							if( (v - 1) & 2)
-								cmask |= META ;
+								mask = META ;
+
+							if( (v - 1) & 4)
+								mask |= CTRL ;
 
 							v = v1 ;
 						}
@@ -417,7 +419,7 @@ int getcmd( void) {
 								break ;
 						}
 
-						return c | SPEC | cmask ;
+						return c | SPEC | mask ;
 					} else if( c == ';') {	/* Start of SHFT/ALT/CTL state */
 						v1 = v ;
 						v = 0 ;
@@ -433,20 +435,24 @@ int getcmd( void) {
 				KPUSH( *(--kptr)) ;
 
 			c = get1key() ;
-		}
+		} else
+			kptr-- ;
 
 		if( c == metac) {
-			cmask |= META ;
+			prefix = META ;
 		} else if( c == ctlxc) {
-			cmask |= CTLX ;
+			if( prefix)
+				break ;	/* ^X^X or M-^X */
+			else
+				prefix = CTLX ;
 		} else
 			break ;
 	}
 
-	if( cmask && islower( c))
+	if( prefix && islower( c))
 		c = flipcase( c) ;
 
-    return c | cmask ;
+    return c | prefix ;
 }
 
 /*  A more generalized prompt/reply function allowing the caller

maze.cmd

@@ -9,6 +9,8 @@ set %D3 0
 set %D4 -1
 set %D5 0
 
+select-buffer maze
+
 # draw the maze layout
 $curwidth insert-string " "
 newline
@@ -98,3 +100,5 @@ write-message $line
 set $curline 3
 set $curcol 1
 set $curchar 32
+
+unmark-buffer

screensize.cmd

@@ -1,4 +1,5 @@
 # Visualize Screen Dimensions
+select-buffer screensize
 insert-string &cat $curwidth &cat "x" $pagelen
 insert-string &rig "---------+" &sub 10 $curcol
 &sub &div $curwidth 10 1 insert-string "---------+"