1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Extract import data from sys.6 and generate C string version.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
int
main(int argc, char **argv)
{
FILE *fin;
char buf[1024], *p, *q;
if(argc != 2) {
fprintf(stderr, "usage: mksys sys.6\n");
exit(1);
}
if((fin = fopen(argv[1], "r")) == NULL) {
fprintf(stderr, "open %s: %s\n", argv[1], strerror(errno));
exit(1);
}
// look for $$ that introduces imports
while(fgets(buf, sizeof buf, fin) != NULL)
if(strstr(buf, "$$"))
goto begin;
fprintf(stderr, "did not find beginning of imports\n");
exit(1);
begin:
printf("char *sysimport = \n");
// process imports, stopping at $$ that closes them
while(fgets(buf, sizeof buf, fin) != NULL) {
buf[strlen(buf)-1] = 0; // chop \n
if(strstr(buf, "$$"))
goto end;
// chop leading white space
for(p=buf; *p==' ' || *p == '\t'; p++)
;
// cut out decl of init_sys_function - it doesn't exist
if(strstr(buf, "init_sys_function"))
continue;
// sys.go claims to be in package SYS to avoid
// conflicts during "6g sys.go". rename SYS to sys.
for(q=p; *q; q++)
if(memcmp(q, "SYS", 3) == 0)
memmove(q, "sys", 3);
printf("\t\"%s\\n\"\n", p);
}
fprintf(stderr, "did not find end of imports\n");
exit(1);
end:
printf("\t\"$$\\n\";\n");
return 0;
}
|
