gforth: gforth/test/libcc.fs

1 :	anton	1.1	require libcc.fs
2 :
3 :			\c #include <string.h>
4 :			\c #include <stdlib.h>
5 :
6 :			c-function strlen strlen a -- n
7 :	anton	1.2	cr s\" fooo\0" 2dup dump drop .s strlen cr .s drop cr
8 :	anton	1.1	c-function labs labs n -- n
9 :
10 :	anton	1.3	\c #define _FILE_OFFSET_BITS 64
11 :	anton	1.1	\c #include <sys/types.h>
12 :			\c #include <unistd.h>
13 :			c-function dlseek lseek n d n -- d
14 :
15 :			cr s\" fooo\0" 2dup dump drop .s strlen cr .s drop cr
16 :			-5 labs .s drop cr
17 :	anton	1.3
18 :			\c #include <stdio.h>
19 :			c-function printf-nr printf a n r -- n
20 :			c-function printf-rn printf a r n -- n
21 :			s\" n=%d r=%f\n\0" drop -5 -0.5e fp@ hex. cr printf-nr . cr
22 :			s\" r=%f n=%d\n\0" drop -0.5e -5 printf-rn . cr
23 :
24 :			\c #define printfull(s,ull) printf(s,(unsigned long long)ull)
25 :			c-function printfull printfull a n -- n
26 :			s\" ull=%llu\n\0" drop -1 printfull . cr
27 :			s\" ull=%llu r=%f\n\0" drop -1 -0.5e printf-nr . cr
28 :	anton	1.4
29 :			\c #define printfll(s,ll) printf(s,(long long)ll)
30 :			c-function printfll printfll a n -- n
31 :			s\" ll=%lld\n\0" drop -1 printfll . cr
32 :			s\" ll=%lld r=%f\n\0" drop -1 -0.5e printf-nr . cr
33 :	anton	1.5
34 :			\ test calling a C function pointer from Forth
35 :
36 :			\ first create a C function pointer:
37 :
38 :			\c typedef long (* func1)(long);
39 :			\c #define labsptr(dummy) ((func1)labs)
40 :			c-function labsptr labsptr -- a
41 :
42 :			\ now the call
43 :			\c #define call_func1(par1,fptr) ((func1)fptr)(par1)
44 :			c-function call_func1 call_func1 n func -- n
45 :
46 :			-5 labsptr call_func1 . cr
47 :