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plan9: add "write" command and keep only space and tab as arg separator since ";" and ":" are valid glyphs and someone might actually want to insert them as part of the command

--- a/orca.man

+++ b/orca.man

@@ -237,9 +237,15 @@

 .TP

 .B midi PATH

 Set MIDI output path.

+.TP

 .B print

 Print selected rectangle to

 .IR stdout .

+.TP

+.B write TEXT [X] [Y]

+Writes the text at the cursor position or at

+.I X,Y

+if specified.

 .PP

 .I Orca

 treats

--- a/plan9.c

+++ b/plan9.c

@@ -447,7 +447,7 @@

 command(char *s, void (*snapshot)(void))

 {

 	char tmp[256];

-	char *a;

+	char *a, *b;

 	int x, y;

 	snprint(tmp, sizeof(tmp), "%s", s);

@@ -467,7 +467,7 @@

 		return;

 	}

-	if ((a = strchr(s, ':')) != nil || (a = strchr(s, ' ')) != nil)

+	if ((a = strpbrk(s, " \t")) != nil)

 		*a++ = 0;

 	if (s[0] == 'p' && s[1] == 'l') /* play */

@@ -510,6 +510,19 @@

 			netdial(nil, a);

 		else if (s[0] == 'm' && s[1] == 'i') /* midi */

 			midiopen(a);

+		else if (s[0] == 'w' && s[1] == 'r') { /* write:abcd;13;14 */

+			b = a;

+			x = cur.x;

+			y = cur.y;

+			if ((a = strpbrk(b, " \t")) != nil) {

+				*a++ = 0;

+				x = atoi(a);

+				if ((a = strpbrk(a, " \t")) != nil)

+					y = atoi(++a);

+			}

+			for (; *b != 0; x++, b++)

+				fieldset(x, y, *b);

+		}

 		/* FIXME color, find, select, inject, write, time */

 	} else if (strcmp(s, "undo") == 0) {