plan9fox/libpanel/utf.c
xfnw 856abd2f7d Squashed 'sys/src/cmd/gopher/' content from commit 3680728b6
git-subtree-dir: sys/src/cmd/gopher
git-subtree-split: 3680728b631ed65201b397f4ae3e5d1b03be42f9
2022-07-01 15:46:23 -04:00

31 lines
554 B
C

#include <u.h>
#include <libc.h>
#include <draw.h>
#include <event.h>
#include <panel.h>
#include "pldefs.h"
/*
* This is the same definition that 8½ uses
*/
int pl_idchar(int c){
if(c<=' '
|| 0x7F<=c && c<=0xA0
|| utfrune("!\"#$%&'()*+,-./:;<=>?@`[\\]^{|}~", c))
return 0;
return 1;
}
int pl_rune1st(int c){
return (c&0xc0)!=0x80;
}
char *pl_nextrune(char *s){
do s++; while(!pl_rune1st(*s));
return s;
}
int pl_runewidth(Font *f, char *s){
char r[4], *t;
t=r;
do *t++=*s++; while(!pl_rune1st(*s));
*t='\0';
return stringwidth(f, r);
}