1 #include "stdinc.h"
2 #include "dat.h"
3 #include "fns.h"
4 
5 int
6 readifile(IFile *f, char *name)
7 {
8 	ZBlock *b;
9 
10 	b = readfile(name);
11 	if(b == nil)
12 		return -1;
13 	f->name = name;
14 	f->b = b;
15 	f->pos = 0;
16 	return 0;
17 }
18 
19 void
20 freeifile(IFile *f)
21 {
22 	freezblock(f->b);
23 	f->b = nil;
24 	f->pos = 0;
25 }
26 
27 int
28 partifile(IFile *f, Part *part, u64int start, u32int size)
29 {
30 	ZBlock *b;
31 
32 	b = alloczblock(size, 0, part->blocksize);
33 	if(b == nil)
34 		return -1;
35 	if(readpart(part, start, b->data, size) < 0){
36 		seterr(EAdmin, "can't read %s: %r", part->name);
37 		freezblock(b);
38 		return -1;
39 	}
40 	f->name = part->name;
41 	f->b = b;
42 	f->pos = 0;
43 	return 0;
44 }
45 
46 /*
47  * return the next non-blank input line,
48  * stripped of leading white space and with # comments eliminated
49  */
50 char*
51 ifileline(IFile *f)
52 {
53 	char *s, *e, *t;
54 	int c;
55 
56 	for(;;){
57 		s = (char*)&f->b->data[f->pos];
58 		e = memchr(s, '\n', f->b->len - f->pos);
59 		if(e == nil)
60 			return nil;
61 		*e++ = '\0';
62 		f->pos = e - (char*)f->b->data;
63 		t = strchr(s, '#');
64 		if(t != nil)
65 			*t = '\0';
66 		for(; c = *s; s++)
67 			if(c != ' ' && c != '\t' && c != '\r')
68 				return s;
69 	}
70 }
71 
72 int
73 ifilename(IFile *f, char *dst)
74 {
75 	char *s;
76 
77 	s = ifileline(f);
78 	if(s == nil || strlen(s) >= ANameSize)
79 		return -1;
80 	namecp(dst, s);
81 	return 0;
82 }
83 
84 int
85 ifileu32int(IFile *f, u32int *r)
86 {
87 	char *s;
88 
89 	s = ifileline(f);
90 	if(s == nil)
91 		return -1;
92 	return stru32int(s, r);
93 }