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#include "stdinc.h"
#include "dat.h"
#include "fns.h"
int
readifile(IFile *f, char *name)
{
ZBlock *b;
b = readfile(name);
if(b == nil)
return -1;
f->name = name;
f->b = b;
f->pos = 0;
return 0;
}
void
freeifile(IFile *f)
{
freezblock(f->b);
f->b = nil;
f->pos = 0;
}
int
partifile(IFile *f, Part *part, u64int start, u32int size)
{
ZBlock *b;
b = alloczblock(size, 0, part->blocksize);
if(b == nil)
return -1;
if(readpart(part, start, b->data, size) < 0){
seterr(EAdmin, "can't read %s: %r", part->name);
freezblock(b);
return -1;
}
f->name = part->name;
f->b = b;
f->pos = 0;
return 0;
}
/*
* return the next non-blank input line,
* stripped of leading white space and with # comments eliminated
*/
char*
ifileline(IFile *f)
{
char *s, *e, *t;
int c;
for(;;){
s = (char*)&f->b->data[f->pos];
e = memchr(s, '\n', f->b->len - f->pos);
if(e == nil)
return nil;
*e++ = '\0';
f->pos = e - (char*)f->b->data;
t = strchr(s, '#');
if(t != nil)
*t = '\0';
for(; c = *s; s++)
if(c != ' ' && c != '\t' && c != '\r')
return s;
}
}
int
ifilename(IFile *f, char *dst)
{
char *s;
s = ifileline(f);
if(s == nil || strlen(s) >= ANameSize)
return -1;
namecp(dst, s);
return 0;
}
int
ifileu32int(IFile *f, u32int *r)
{
char *s;
s = ifileline(f);
if(s == nil)
return -1;
return stru32int(s, r);
}
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