Test maze scripts using subroutines instead of stored procedures. (Avoid leftover buffers after execution).

Use generic list deletion API.
Remove lines at parsing time.

blindmaz.cmd

@@ -4,13 +4,14 @@
 # either maze.cmd, sharpmaz.cmd or floodmaz.cmd
 execute-file floodmaz.cmd
 
-set %meml $curline	# save entrance location
-set %memc $curcol
-set %x &add %memc 1
-set %y %meml
+set %dotc &asc "•"	# alternatively use "."
+set $curchar %dotc
+set %x &add $curcol 1
+set %y $curline
 end-of-line
 set %stopcol &sub $curcol 1
 
+# X-Y offset for absolute direction: east, south, west, north
 set %DX0 1
 set %DY0 0
 set %DX1 0
@@ -20,53 +21,41 @@ set %DY2 0
 set %DX3 0
 set %DY3 -1
 
-set %dotc &asc "•"	# alternatively use "."
-
-!store peep
-	set %OX &ind &cat "%DX" %nD
-	set %OY &ind &cat "%DY" %nD
-	set %nx &add %x %OX
-	set %ny &add %y %OY
-	set $curline %ny
-	set $curcol %nx
-	!if &or &equ $curchar 32 &equ $curchar %dotc
-		!if &equ $curchar 32
-			set %C %dotc
-		!else
-			set %C &asc " "		# erase when backtracking (or highlight)
-		!endif
-		set %D %nD
-		set $curchar %C
-		set $curline %y
-		set $curcol %x
-		set $curchar %C
-		set %x &add %nx %OX
-		set %y &add %ny %OY
-		set $curline %y
-		set $curcol %x
-		set %res TRUE
-	!else
-		set %res FALSE
-	!endif
-	update-screen
-!endm
-
-set %D 0		# looking EAST
+set %absD 0							# absolute direction: looking EAST
 !while &les %x %stopcol
-	set %nD &mod &add %D 3 4				# Can go left?
-	run peep
-	!if &not %res
-		set %nD %D							# Can go straight?
-		run peep
-		!if &not %res
-			set %nD &mod &add %D 1 4		# Can go right?
-			run peep
-			!if &not %res
-				set %D &mod &add %D 2 4		# Go back!
+# try move on left, right or front
+	set %relD 3						# 3, 0, 1, 2 == left, front, right, back
+	!while &not &equ %relD 2
+		set %newD &mod &add %absD %relD 4
+		set %offX &ind &cat "%DX" %newD
+		set %offY &ind &cat "%DY" %newD
+		set %nx &add %x %offX
+		set %ny &add %y %offY
+		set $curline %ny
+		set $curcol  %nx
+		!if &or &equ $curchar 32 &equ $curchar %dotc
+			!if &equ $curchar 32
+				set %C %dotc
+			!else
+				set %C &asc " "		# erase (or highlight) when backtracking
 			!endif
+			set %absD %newD
+			set $curchar %C
+			set $curline %y
+			set $curcol  %x
+			set $curchar %C
+			set %x &add %nx %offX
+			set %y &add %ny %offY
+			update-screen
+			!goto moveon
 		!endif
-	!endif
+		set %relD &mod &add %relD 1 4
+	!endwhile
+# else turn around
+	set %absD &mod &add %absD 2 4	#	 face back!
+:moveon
 !endwhile
-set $curline %meml
-set $curcol %memc
+
+set $curline %y
+set $curcol  %x
 unmark-buffer

buffer.c

@@ -14,6 +14,7 @@
 #include "defines.h"
 #include "file.h"
 #include "input.h"
+#include "list.h"
 #include "mlout.h"
 #include "utf8.h"
 #include "util.h"
@@ -326,13 +327,12 @@ static unsigned int utf8_disp_len( const char *s) {
 
 
 static int makelist( int iflag) {
-    buffer_p bp;
-    int s;
     char line[ FNAMSTART + sizeof( fname_t)] ;
 
     blistp->b_flag &= ~BFCHG;   /* Don't complain! Mute bclear() */
-    if ((s = bclear(blistp)) != TRUE)   /* Blow old text away   */
-        return s;
+    int s = bclear( blistp) ;   /* Blow old text away   */
+    if( s != TRUE)
+        return s ;
 
     blistp->b_fname[ 0] = 0 ;   /* in case of user override */
 
@@ -346,19 +346,15 @@ static int makelist( int iflag) {
         return FALSE ;
 
 /* output the list of buffers */
-    for( bp = bheadp ; bp != NULL ; bp = bp->b_bufp) {  /* For all buffers */
-        char *cp1, *cp2 ;
+    for( buffer_p bp = bheadp ; bp != NULL ; bp = bp->b_bufp) {
         int c ;
-        line_p lp ;
-        long nbytes ;       /* # of bytes in current buffer */
-        long nlines ;       /* # of lines in current buffer */
 
     /* skip invisible buffers if iflag is false */
         if (((bp->b_flag & BFINVS) != 0) && (iflag != TRUE))
             continue;
 
         do_layout( line, bp->b_mode) ;
-        cp1 = line ;    /* Start at left edge   */
+        char *cp1 = line ;    /* Start at left edge   */
 
     /* output status of ACTIVE flag ('@' when the file has been read in) */
         *cp1++ = (bp->b_active == TRUE) ? '@' : ' ' ;
@@ -370,9 +366,10 @@ static int makelist( int iflag) {
         *cp1 = ((bp->b_flag & BFCHG) != 0) ? '*' : ' ' ;
 
     /* Buffer size */
-        nbytes = 0L;    /* Count bytes in buf.  */
-        nlines = 0 ;
-        for( lp = lforw( bp->b_linep) ; lp != bp->b_linep ; lp = lforw( lp)) {
+        long nbytes = 0L;    /* Count bytes in buf.  */
+        long nlines = 0 ;
+        for( line_p lp = lforw( bp->b_linep) ; lp != bp->b_linep ;
+															lp = lforw( lp)) {
             nbytes += (long) llength(lp) + 1L;
             nlines += 1 ;
         }
@@ -385,8 +382,8 @@ static int makelist( int iflag) {
         *cp1++ = ' ' ;
 
     /* Display buffer name */
-        cp2 = &bp->b_bname[ 0] ;
-        while ((c = *cp2++) != 0)
+        char *cp2 = &bp->b_bname[ 0] ;
+        while( (c = *cp2++) != 0)
             *cp1++ = c;
 
     /* Pad with spaces to max buffer name length */
@@ -528,7 +525,6 @@ buffer_p bfind( const char *bname, boolean create_f, int flags) {
    updates that are required.  Return TRUE if everything looks good.
  */
 int bclear( buffer_p bp) {
-    line_p lp ;
     int s ;
 
     if( (bp->b_flag & (BFINVS | BFCHG)) == BFCHG    /* regular and changed */
@@ -536,13 +532,28 @@ int bclear( buffer_p bp) {
         return s ;
 
     bp->b_flag &= ~BFCHG ;      /* Not changed          */
-    while( (lp = lforw( bp->b_linep)) != bp->b_linep)
-        lfree( lp) ;
+	line_p lp = bp->b_linep ;
+	if( lp->l_fp != lp) {	/* non empty buffer */
+	/* turn line ring into a list and delete it */
+		lp->l_bp->l_fp = NULL ;
+		freelist( (list_p) lp->l_fp) ;
+		lp->l_fp = lp->l_bp = lp ;
+
+	/* Fix dots and marks */
+	    bp->b_dotp = bp->b_linep ;  /* Fix "."              */
+    	bp->b_doto = 0 ;
+    	bp->b_markp = NULL ;        /* Invalidate "mark"    */
+    	bp->b_marko = 0 ;
+		if( bp->b_nwnd)	/* buffer is displayed */
+			for( window_p wp = wheadp ; wp ; wp = wp->w_wndp)
+				if( wp->w_bufp == bp) {
+	            	wp->w_linep = wp->w_dotp = lp ;
+    	        	wp->w_doto = 0 ;
+        	    	wp->w_markp = NULL ;
+            		wp->w_marko = 0 ;
+				}
+	}
 
-    bp->b_dotp = bp->b_linep ;  /* Fix "."              */
-    bp->b_doto = 0 ;
-    bp->b_markp = NULL ;        /* Invalidate "mark"    */
-    bp->b_marko = 0 ;
     return TRUE ;
 }
 

exec.c

@@ -19,6 +19,7 @@
 #include "flook.h"
 #include "input.h"
 #include "line.h"
+#include "list.h"
 #include "mlout.h"
 #include "random.h"
 #include "util.h"
@@ -39,18 +40,24 @@ boolean clexec = FALSE ;    	/* command line execution flag  */
 #define DENDWHILE   7
 #define DBREAK      8
 #define DFORCE      9
+#define DGOSUB		10
 
 
+typedef struct caller {
+	struct caller *next ;
+	line_p caller ;
+} *caller_p ;
+
 /* The !WHILE directive in the execution language needs to
  * stack references to pending whiles. These are stored linked
  * to each currently open procedure via a linked list of
  * the following structure.
 */
 typedef struct while_block {
+    struct while_block *w_next ;	/* next while */
     line_p w_begin ;				/* ptr to !while statement */
     line_p w_end ;					/* ptr to the !endwhile statement */
     int w_type ;					/* block type */
-    struct while_block *w_next ;	/* next while */
 } *while_p ;
 
 #define BTWHILE     1
@@ -60,7 +67,8 @@ typedef struct while_block {
 
 static const char *dname[] = {
     "if", 	"else", 	"endif",	"goto",		"return",
-	"endm", "while",	"endwhile", "break",	"force"
+	"endm", "while",	"endwhile", "break",	"force",
+	"gosub"
 } ;
 
 #define NUMDIRS     ARRAY_SIZE( dname)
@@ -185,8 +193,8 @@ static int docmd( char *cline) {
     return status ;
 }
 
-/*
- * new token:
+
+/* new token:
  *  chop a token off a string
  *  return a pointer past the token
  *
@@ -203,52 +211,45 @@ static char *newtoken( char *src, char **tokref) {
         ++src ;
 
     /* scan through the source string */
-    boolean quotef = FALSE ;	/* is the current string quoted? */
-    while( *src) {
-	    char c ;	/* temporary character */
+    boolean quote_f = FALSE ;	/* is the current string quoted? */
+	for( char c = *src ; c ; c = *++src) {
+    /* process special characters */
+        if( c == '~') {
+            c = *++src ;
+            if( c == 0)
+                break ;
 
-        /* process special characters */
-        if( *src == '~') {
-            ++src;
-            if (*src == 0)
-                break;
-            switch (*src++) {
+            switch( c) {
             case 'r':
-                c = 13;
-                break;
+                c = 13 ;
+                break ;
             case 'n':
-                c = 10;
-                break;
+                c = 10 ;
+                break ;
             case 't':
-                c = 9;
-                break;
+                c = 9 ;
+                break ;
             case 'b':
-                c = 8;
-                break;
+                c = 8 ;
+                break ;
             case 'f':
-                c = 12;
-                break;
-            default:
-                c = *(src - 1);
+                c = 12 ;
+                break ;
             }
         } else {
-            /* check for the end of the token */
-            if (quotef) {
-                if (*src == '"')
-                    break;
-            } else {
-                if (*src == ' ' || *src == '\t')
-                    break;
-            }
+        /* check for the end of the token: end of string or space separator */
+            if( quote_f) {
+                if( c == '"')
+                    break ;
+            } else if( c == ' ' || c == '\t')
+                break ;
 
-            /* set quote mode if quote found */
-            if (*src == '"')
-                quotef = TRUE;
-
-            /* record the character */
-            c = *src++;
+        /* set quote mode if quote found */
+            if( c == '"')
+                quote_f = TRUE ;
         }
 
+    /* record the character */
 		if( idx < size - 1)
 			tok[ idx++] = c ;
 		else if( size > 1) {
@@ -256,7 +257,7 @@ static char *newtoken( char *src, char **tokref) {
 			
 			tmptok = malloc( size + 32) ;
 			if( tmptok == NULL)
-				size = 0 ;
+				size = 0 ;			/* can't store more */
 			else {
 				memcpy( tmptok, tok, idx) ;
 				free( tok) ;
@@ -267,15 +268,11 @@ static char *newtoken( char *src, char **tokref) {
 		}
     }
 
-    /* terminate the token and exit */
-    if (*src)
-        ++src;
-
     if( tok != NULL)
         tok[ idx] = 0 ;
 
     *tokref = tok ;
-    return src;
+    return src + (*src != 0) ;
 }
 
 static char *token( char *srcstr, char *tok, int maxtoksize) {
@@ -488,19 +485,6 @@ BINDABLE( execbuf) {
 }
 
 
-/* free a list of while block pointers
- *
- * while_p wp;      head of structure to free
- */
-static void freewhile( while_p wp) {
-	while( wp != NULL) {
-		while_p next = wp->w_next ;
-		free( wp) ;
-		wp = next ;
-	}
-}
-
-
 static boolean storeline( char *eline, int linlen) {
 /* allocate the space for the line */
    	line_p mp = lalloc( linlen) ;
@@ -564,19 +548,10 @@ static int dobuf( buffer_p bp) {
 			if( *eline != ' ' && *eline != '\t')
 				break ;
 
-	/* empty blank and comment lines */
+	/* delete blank and comment lines */
 		if( eline == eol || *eline == '#' || *eline == ';') {
-			if( bp->b_nwnd != 0)
-				lp->l_used = 0 ;
-			else {
-			/* delete line if buffer is not displayed */
-				line_p curlp = lp ;
-				lp = lp->l_bp ;
-				lp->l_fp = curlp->l_fp ;
-				curlp->l_fp->l_bp = lp ;
-				free( curlp) ;
-			}
-	
+			lp = lp->l_bp ;
+			lfree( lp->l_fp) ;
 			continue ;
 		}
 
@@ -598,7 +573,9 @@ static int dobuf( buffer_p bp) {
 			} else if( !storeline( lp->l_text, lp->l_used))
 				goto failexit ;
 
-			lp->l_used = 0 ;
+		/* remove line */
+			lp = lp->l_bp ;
+			lfree( lp->l_fp) ;
 			continue ;			
 		}
 
@@ -618,8 +595,7 @@ static int dobuf( buffer_p bp) {
 		if( !strncmp( eline, "!store", 6)) {
 			if( lp->l_used < lp->l_size) {
 				eline[ lp->l_used] = 0 ;
-				execstr = &eline[ 6] ;
-				gettoken( &tkn[ 1], sizeof tkn - 1) ;
+				token( &eline[ 6], &tkn[ 1], sizeof tkn - 1) ;
 				char c = tkn[ 1] ;
 				if( c >= '1' && c <= '9') { /* number >= 1 */
 					if( !storemac( TRUE, atoi( &tkn[ 1])))
@@ -632,7 +608,9 @@ static int dobuf( buffer_p bp) {
 				}
 			}
 
-			lp->l_used = 0 ;
+		/* remove line */
+			lp = lp->l_bp ;
+			lfree( lp->l_fp) ;
 			continue ;
 		} else if( !strncmp( eline, "!while", 6)) {
     	/* if it is a while directive, make a block... */
@@ -693,8 +671,8 @@ static int dobuf( buffer_p bp) {
     /* while and endwhile should match! */
 		mloutfmt( "%%!WHILE with no matching !ENDWHILE in '%s'", bp->b_bname) ;
 	failexit:
-		freewhile( scanner) ;
-   	    freewhile( whlist) ;
+		freelist( (list_p) scanner) ;
+ 	    freelist( (list_p) whlist) ;
    	    return FALSE ;
     }
 
@@ -707,6 +685,7 @@ static int dobuf( buffer_p bp) {
 	int status = TRUE ;		/* status of command execution */
 	boolean done = FALSE ;
     int execlevel = 0 ;		/* execution IF level */
+	caller_p returnto = NULL ;
 	line_p lp = hlp->l_fp ;
     for( ; lp != hlp ; lp = lp->l_fp) {
 		if( einit) {
@@ -847,9 +826,10 @@ static int dobuf( buffer_p bp) {
 				break ;
             case DENDIF:	/* ENDIF directive */
                 if( execlevel)
-                    --execlevel;
+                    --execlevel ;
 
 				break ;
+			case DGOSUB:	/* GOSUB directive */
             case DGOTO:		/* GOTO directive */
             /* .....only if we are currently executing */
                 if( execlevel != 0)
@@ -865,6 +845,18 @@ static int dobuf( buffer_p bp) {
 						char c = *glp->l_text ;
                         if(	(c == '*' || c == ':')
 						&&	!strncmp( &glp->l_text[ 1], golabel, linlen)) {
+							if( dirnum == DGOSUB) {
+								caller_p cp = malloc( sizeof *cp) ;
+								if( cp == NULL) {
+									status = mloutfail( "OoM on !gosub") ;
+									break ;
+								} else {
+									cp->caller = lp ;
+									cp->next = returnto ;
+									returnto = cp ;
+								}
+							}
+
 							lp = glp ;
                             break ;
                         }
@@ -879,8 +871,15 @@ static int dobuf( buffer_p bp) {
 
 				break ;
             case DRETURN:   /* RETURN directive */
-                if( execlevel == 0)
-                    done = TRUE ;
+                if( execlevel == 0) {
+					if( returnto != NULL) {
+						caller_p cp = returnto ;
+						lp = returnto->caller ;
+						returnto = returnto->next ;
+						free( cp) ;
+					} else
+	                    done = TRUE ;
+				}
 
 				break ;
             case DENDWHILE: /* ENDWHILE directive */
@@ -929,7 +928,8 @@ static int dobuf( buffer_p bp) {
         bp->b_doto = 0 ;
     }
 
-    freewhile( whlist) ;
+	freelist( (list_p) returnto) ;
+    freelist( (list_p) whlist) ;
     if( einit)
 		free( einit) ;
 

floodmaz.cmd

@@ -1,4 +1,4 @@
-## floodmaz.cmd -- solve maze by painting right wall
+## floodmaz.cmd -- solve maze by painting wall on the right
 
 # 6 set $seed
 # either maze.cmd or sharpmaz.cmd
@@ -8,39 +8,9 @@ set %thisbuf $cbufname
 set %meml $curline
 set %memc $curcol
 
-!store pushxy				# push x y
-	set %x $curcol
-	set %y $curline
-	select-buffer stack
-	beginning-of-file
-	insert-string %x
-	newline
-	insert-string %y
-	newline
-	select-buffer %thisbuf
-!endm
-
-!store popxy				# pop x y
-	select-buffer stack
-	beginning-of-file
-	set %x $line
-1	kill-to-end-of-line
-	set %y $line
-1	kill-to-end-of-line
-	select-buffer %thisbuf
-	set $curline %y
-	set $curcol %x
-!endm
-
-!store probe
-	!if &not &or &equ $curchar %NC &equ $curchar 32
-		run pushxy
-	!endif
-!endm
-
 set $curline 1
 set $curcol 0
-run pushxy	#push stop position
+!gosub pushxy	#push stop position
 set %x 1
 set $curline 4
 set $curcol %x
@@ -51,16 +21,25 @@ set %NC &asc "█"
 	set %cc $curcol
 	set %ll $curline
 	set $curcol &add %cc 1
-	run probe
+	!gosub probe
 	set $curcol &add %cc -1
-	run probe
+	!gosub probe
 	set $curline &add %ll 1
 	set $curcol %cc
-	run probe
+	!gosub probe
 	set $curline &add %ll -1
 	set $curcol %cc
-	run probe
-	run popxy	
+	!gosub probe
+# pop x y
+	select-buffer stack
+	beginning-of-file
+	set %x $line
+1	kill-to-end-of-line
+	set %y $line
+1	kill-to-end-of-line
+	select-buffer %thisbuf
+	set $curline %y
+	set $curcol %x
 !endwhile
 
 set $curline %meml
@@ -70,3 +49,19 @@ unmark-buffer
 select-buffer %thisbuf
 unmark-buffer
 delete-buffer stack
+!return
+
+:probe
+	!if &not &or &equ $curchar %NC &equ $curchar 32
+	:pushxy					# push x y
+		set %x $curcol
+		set %y $curline
+		select-buffer stack
+		beginning-of-file
+		insert-string %x
+		newline
+		insert-string %y
+		newline
+		select-buffer %thisbuf
+	!endif
+!return

line.c

@@ -21,6 +21,7 @@
 
 #include "buffer.h"
 #include "defines.h"
+#include "list.h"
 #include "mlout.h"
 #include "utf8.h"
 #include "window.h"
@@ -198,47 +199,45 @@ line_p lalloc( int used) {
     return lp ;
 }
 
-/*
- * Delete line "lp". Fix all of the links that might point at it (they are
+
+/* Delete line "lp". Fix all of the links that might point at it (they are
  * moved to offset 0 of the next line. Unlink the line from whatever buffer it
  * might be in. Release the memory. The buffers are updated too; the magic
  * conditions described in the above comments don't hold here.
  */
 void lfree( line_p lp) {
-    buffer_p bp;
-    struct window *wp;
+    for( window_p wp = wheadp ; wp != NULL ; wp = wp->w_wndp) {
+        if( wp->w_linep == lp)
+            wp->w_linep = lp->l_fp ;
 
-    wp = wheadp;
-    while (wp != NULL) {
-        if (wp->w_linep == lp)
-            wp->w_linep = lp->l_fp;
-        if (wp->w_dotp == lp) {
-            wp->w_dotp = lp->l_fp;
-            wp->w_doto = 0;
+        if( wp->w_dotp == lp) {
+            wp->w_dotp = lp->l_fp ;
+            wp->w_doto = 0 ;
         }
-        if (wp->w_markp == lp) {
-            wp->w_markp = lp->l_fp;
-            wp->w_marko = 0;
+
+        if( wp->w_markp == lp) {
+            wp->w_markp = lp->l_fp ;
+            wp->w_marko = 0 ;
         }
-        wp = wp->w_wndp;
     }
-    bp = bheadp;
-    while (bp != NULL) {
-        if (bp->b_nwnd == 0) {
-            if (bp->b_dotp == lp) {
-                bp->b_dotp = lp->l_fp;
-                bp->b_doto = 0;
+
+    for( buffer_p bp = bheadp ; bp != NULL ; bp = bp->b_bufp) {
+        if( bp->b_nwnd == 0) {
+            if( bp->b_dotp == lp) {
+                bp->b_dotp = lp->l_fp ;
+                bp->b_doto = 0 ;
             }
-            if (bp->b_markp == lp) {
-                bp->b_markp = lp->l_fp;
-                bp->b_marko = 0;
+			
+            if( bp->b_markp == lp) {
+                bp->b_markp = lp->l_fp ;
+                bp->b_marko = 0 ;
             }
         }
-        bp = bp->b_bufp;
     }
-    lp->l_bp->l_fp = lp->l_fp;
-    lp->l_fp->l_bp = lp->l_bp;
-    free((char *) lp);
+
+    lp->l_bp->l_fp = lp->l_fp ;
+    lp->l_fp->l_bp = lp->l_bp ;
+    free( lp) ;
 }
 
 /*
@@ -747,28 +746,19 @@ static int ldelnewline( void) {
     return TRUE;
 }
 
-/*
- * Delete all of the text saved in the kill buffer. Called by commands when a
+
+/* Delete all of the text saved in the kill buffer. Called by commands when a
  * new kill context is being created. The kill buffer array is released, just
  * in case the buffer has grown to immense size. No errors.
  */
-void kdelete(void)
-{
-    kill_p kp;      /* ptr to scan kill buffer chunk list */
+void kdelete( void) {
+    if( kbufh != NULL) {
+    /* first, delete all the chunks */
+		freelist( (list_p) kbufh) ;
 
-    if (kbufh != NULL) {
-
-        /* first, delete all the chunks */
-        kbufp = kbufh;
-        while (kbufp != NULL) {
-            kp = kbufp->d_next;
-            free(kbufp);
-            kbufp = kp;
-        }
-
-        /* and reset all the kill buffer pointers */
-        kbufh = kbufp = NULL;
-        kused = KBLOCK;
+    /* and reset all the kill buffer pointers */
+        kbufh = kbufp = NULL ;
+        kused = KBLOCK ;
         klen = 0 ;
         if( value != NULL) {
             free( value) ;

list.c

@@ -0,0 +1,16 @@
+/* list.c -- implements list.h */
+/* Copyright © 2021 Renaud Fivet */
+#include "list.h"
+
+#include <stdlib.h> /* free() */
+
+/* free a list */
+void freelist( list_p lp) {
+	while( lp) {
+		list_p next = lp->next ;
+		free( lp) ;
+		lp = next ;
+	}
+}
+
+/* end of list.c */

list.h

@@ -0,0 +1,13 @@
+/* list.h -- generic list deletion */
+/* Copyright © 2021 Renaud Fivet */
+#ifndef _LIST_H_
+#define _LIST_H_
+
+typedef struct list {
+	struct list *next ;
+} *list_p ;
+
+void freelist( list_p lp) ;
+
+#endif
+/* end of list.h */

sharpmaz.cmd

@@ -15,13 +15,6 @@ set %old $line
 set $line %spaces
 next-line
 
-!store check
-	!if &not &equ $curchar 32
-		set %v &add %v %inc
-	!endif
-	set %inc &tim %inc 2
-!endm
-
 !while &less $curline %el
 	set $curcol 1
 	!while &less $curcol %ec
@@ -29,15 +22,15 @@ next-line
 			set %v 0
 			set %inc 1
 			previous-line
-			run check
+			!gosub check
 			next-line
 			backward-character
-			run check
+			!gosub check
 			2 forward-character
-			run check
+			!gosub check
 			next-line
 			backward-character
-			run check
+			!gosub check
 			previous-line
 			# alternatively use single width "╳╵╴┘╶└─┴╷│┐┤┌├┬┼"
 			set $curchar &asc &mid "╳╹╸┛╺┗━┻╻┃┓┫┏┣┳╋" &add %v 1 1
@@ -51,3 +44,11 @@ beginning-of-file
 set $line %old
 set $curline %meml
 set $curcol %memc
+!return
+
+:check
+	!if &not &equ $curchar 32
+		set %v &add %v %inc
+	!endif
+	set %inc &tim %inc 2
+!return