// edit hash tables
void
edhash(char *input)
{
// read in hash tables
readhash(input);
// review or update
edithash(input);
return;
}
Biobuf *
prepare(int i, char *arg)
{
struct line *p;
int j, h;
Biobuf *bp;
char *cp, buf[MAXLINELEN];
int nbytes;
Rune r;
bp = Bopen(arg, OREAD);
if (!bp) {
panic(mflag ? 0: 2, "cannot open %s: %r\n", arg);
return 0;
}
if (binary)
return bp;
nbytes = Bread(bp, buf, MIN(1024, MAXLINELEN));
if (nbytes > 0) {
cp = buf;
while (cp < buf+nbytes-UTFmax) {
/*
* heuristic for a binary file in the
* brave new UNICODE world
*/
cp += chartorune(&r, cp);
if (r == 0 || (r > 0x7f && r <= 0xa0)) {
binary++;
return bp;
}
}
Bseek(bp, 0, 0);
}
p = MALLOC(struct line, 3);
for (j = 0; h = readhash(bp, buf); p[j].value = h)
p = REALLOC(p, struct line, (++j+3));
len[i] = j;
file[i] = p;
input[i] = bp; /*fix*/
if (i == 0) { /*fix*/
file1 = arg;
firstchange = 0;
}
else
file2 = arg;
return bp;
}
