[9fans] p9p troff/ps problem, comparison with heirloom

[quanstro@quanstro.net (erik quanstrom)]

this does work on my system.  here's the diff:

- erik

-----
/n/sources/plan9//sys/src/cmd/eqn/text.c:1,6 - text.c:1,7
  #include "e.h"
  #include "y.tab.h"
  #include <ctype.h>
+ #include <utf.h>
  
  #define	CSSIZE	1000
  char	cs[CSSIZE+20];	/* text string converted into this */
/n/sources/plan9//sys/src/cmd/eqn/text.c:42,48 - text.c:43,49
  	wchar_t r;
  	int w;
  
- 	w = mbtowc(&r, psp, 3);
+ 	w = mbtowc(&r, psp, UTFmax);
  	if(w == 0){
  		psp++;
  		return 0;
/n/sources/plan9//sys/src/cmd/eqn/text.c:49,55 - text.c:50,56
  	}
  	if(w < 0){
  		psp += 1;
- 		return 0x80;	/* Plan 9-ism */
+ 		return Runeerror;	/* Plan 9-ism */
  	}
  	psp += w;
  	return r;
/n/sources/plan9//sys/src/cmd/eqn/text.c:112,128 - text.c:113,125
  	printf(".ds %d \"%s\n", yyval, p);
  }
  
- int isalpharune(int c)
- {
- 	return ('a'<=c && c<='z') || ('A'<=c && c<='Z');
- }
- 
  int isdigitrune(int c)
  {
  	return ('0'<=c && c<='9');
  }
  
- trans(int c, char *p1)
+ int
+ trans(int c, char *)
  {
  	int f;
  
/n/sources/plan9//sys/src/cmd/eqn/tuning.c:146,151 - tuning.c:146,155
  		target = &Subbase;
  	else if (eq(s, "Supshift"))
  		target = &Supshift;
+ 	else{
+ 		ERROR "unknown ftune" FATAL;
+ 		return;
+ 	}
  	if (t[0] == '+' || t[0] == '-')
  		*target += f;
  	else