1 7f11104a 2003-12-11 devnull #include <u.h>
2 7f11104a 2003-12-11 devnull #include <libc.h>
3 7f11104a 2003-12-11 devnull #include <bio.h>
4 7f11104a 2003-12-11 devnull #include "libString.h"
8 7f11104a 2003-12-11 devnull Minread= 256,
11 7f11104a 2003-12-11 devnull /* Append up to 'len' input bytes to the string 'to'.
13 7f11104a 2003-12-11 devnull * Returns the number of characters read.
15 7f11104a 2003-12-11 devnull extern int
16 7f11104a 2003-12-11 devnull s_read(Biobuf *fp, String *to, int len)
21 7f11104a 2003-12-11 devnull if(to->ref > 1)
22 7f11104a 2003-12-11 devnull sysfatal("can't s_read a shared string");
23 7f11104a 2003-12-11 devnull for(rv = 0; rv < len; rv += n){
24 7f11104a 2003-12-11 devnull n = to->end - to->ptr;
25 7f11104a 2003-12-11 devnull if(n < Minread){
26 7f11104a 2003-12-11 devnull s_grow(to, Minread);
27 7f11104a 2003-12-11 devnull n = to->end - to->ptr;
29 7f11104a 2003-12-11 devnull if(n > len - rv)
30 7f11104a 2003-12-11 devnull n = len - rv;
31 7f11104a 2003-12-11 devnull n = Bread(fp, to->ptr, n);
32 7f11104a 2003-12-11 devnull if(n <= 0)
34 7f11104a 2003-12-11 devnull to->ptr += n;
36 7f11104a 2003-12-11 devnull s_terminate(to);
37 7f11104a 2003-12-11 devnull return rv;