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#include <u.h>
#include <libc.h>
#include <draw.h>
#include <thread.h>
#include <cursor.h>
#include <mouse.h>
#include <keyboard.h>
#include <frame.h>
#include <fcall.h>
#include "dat.h"
#include "fns.h"
void
cvttorunes(char *p, int n, Rune *r, int *nb, int *nr, int *nulls)
{
uchar *q;
Rune *s;
int j, w;
/*
* Always guaranteed that n bytes may be interpreted
* without worrying about partial runes. This may mean
* reading up to UTFmax-1 more bytes than n; the caller
* knows this. If n is a firm limit, the caller should
* set p[n] = 0.
*/
q = (uchar*)p;
s = r;
for(j=0; j<n; j+=w){
if(*q < Runeself){
w = 1;
*s = *q++;
}else{
w = chartorune(s, (char*)q);
q += w;
}
if(*s)
s++;
else if(nulls)
*nulls = TRUE;
}
*nb = (char*)q-p;
*nr = s-r;
}
void
error(char *s)
{
fprint(2, "rio: %s: %r\n", s);
if(errorshouldabort)
abort();
threadexitsall("error");
}
void*
erealloc(void *p, uint n)
{
p = realloc(p, n);
if(p == nil)
error("realloc failed");
return p;
}
void*
emalloc(uint n)
{
void *p;
p = malloc(n);
if(p == nil)
error("malloc failed");
memset(p, 0, n);
return p;
}
char*
estrdup(char *s)
{
char *p;
p = malloc(strlen(s)+1);
if(p == nil)
error("strdup failed");
strcpy(p, s);
return p;
}
int
isalnum(Rune c)
{
/*
* Hard to get absolutely right. Use what we know about ASCII
* and assume anything above the Latin control characters is
* potentially an alphanumeric.
*/
if(c <= ' ')
return FALSE;
if(0x7F<=c && c<=0xA0)
return FALSE;
if(utfrune("!\"#$%&'()*+,-./:;<=>?@[\\]^`{|}~", c))
return FALSE;
return TRUE;
}
Rune*
strrune(Rune *s, Rune c)
{
Rune c1;
if(c == 0) {
while(*s++)
;
return s-1;
}
while(c1 = *s++)
if(c1 == c)
return s-1;
return nil;
}
int
min(int a, int b)
{
if(a < b)
return a;
return b;
}
int
max(int a, int b)
{
if(a > b)
return a;
return b;
}
char*
runetobyte(Rune *r, int n, int *ip)
{
char *s;
int m;
s = emalloc(n*UTFmax+1);
m = snprint(s, n*UTFmax+1, "%.*S", n, r);
*ip = m;
return s;
}
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