mirror of https://github.com/0intro/wmii
113 lines
2.1 KiB
C
113 lines
2.1 KiB
C
#include <stdlib.h>
|
|
#include <plan9.h>
|
|
#include <bio.h>
|
|
|
|
static char*
|
|
badd(char *p, int *np, char *data, int ndata, int delim, int nulldelim)
|
|
{
|
|
int n;
|
|
|
|
n = *np;
|
|
p = realloc(p, n+ndata+1);
|
|
if(p){
|
|
memmove(p+n, data, ndata);
|
|
n += ndata;
|
|
if(n>0 && nulldelim && p[n-1]==delim)
|
|
p[--n] = '\0';
|
|
else
|
|
p[n] = '\0';
|
|
*np = n;
|
|
}
|
|
return p;
|
|
}
|
|
|
|
char*
|
|
Brdstr(Biobuf *bp, int delim, int nulldelim)
|
|
{
|
|
char *ip, *ep, *p;
|
|
int i, j;
|
|
|
|
i = -bp->icount;
|
|
bp->rdline = 0;
|
|
if(i == 0) {
|
|
/*
|
|
* eof or other error
|
|
*/
|
|
if(bp->state != Bractive) {
|
|
if(bp->state == Bracteof)
|
|
bp->state = Bractive;
|
|
bp->gbuf = bp->ebuf;
|
|
return nil;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* first try in remainder of buffer (gbuf doesn't change)
|
|
*/
|
|
ip = (char*)bp->ebuf - i;
|
|
ep = memchr(ip, delim, i);
|
|
if(ep) {
|
|
j = (ep - ip) + 1;
|
|
bp->icount += j;
|
|
return badd(nil, &bp->rdline, ip, j, delim, nulldelim);
|
|
}
|
|
|
|
/*
|
|
* copy data to beginning of buffer
|
|
*/
|
|
if(i < bp->bsize)
|
|
memmove(bp->bbuf, ip, i);
|
|
bp->gbuf = bp->bbuf;
|
|
|
|
/*
|
|
* append to buffer looking for the delim
|
|
*/
|
|
p = nil;
|
|
for(;;){
|
|
ip = (char*)bp->bbuf + i;
|
|
while(i < bp->bsize) {
|
|
j = read(bp->fid, ip, bp->bsize-i);
|
|
if(j <= 0 && i == 0)
|
|
return p;
|
|
if(j <= 0 && i > 0){
|
|
/*
|
|
* end of file but no delim. pretend we got a delim
|
|
* by making the delim \0 and smashing it with nulldelim.
|
|
*/
|
|
j = 1;
|
|
ep = ip;
|
|
delim = '\0';
|
|
nulldelim = 1;
|
|
*ep = delim; /* there will be room for this */
|
|
}else{
|
|
bp->offset += j;
|
|
ep = memchr(ip, delim, j);
|
|
}
|
|
i += j;
|
|
if(ep) {
|
|
/*
|
|
* found in new piece
|
|
* copy back up and reset everything
|
|
*/
|
|
ip = (char*)bp->ebuf - i;
|
|
if(i < bp->bsize){
|
|
memmove(ip, bp->bbuf, i);
|
|
bp->gbuf = (unsigned char*)ip;
|
|
}
|
|
j = (ep - (char*)bp->bbuf) + 1;
|
|
bp->icount = j - i;
|
|
return badd(p, &bp->rdline, ip, j, delim, nulldelim);
|
|
}
|
|
ip += j;
|
|
}
|
|
|
|
/*
|
|
* full buffer without finding; add to user string and continue
|
|
*/
|
|
p = badd(p, &bp->rdline, (char*)bp->bbuf, bp->bsize, 0, 0);
|
|
i = 0;
|
|
bp->icount = 0;
|
|
bp->gbuf = bp->ebuf;
|
|
}
|
|
}
|