This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
[ID 19990701.031] 4 ctl chars on EBCDIC not asciiish enough
[perl5.git] / os2 / dl_os2.c
1 #include "dlfcn.h"
2
3 #define INCL_BASE
4 #include <os2.h>
5
6 static ULONG retcode;
7
8 void *
9 dlopen(char *path, int mode)
10 {
11         HMODULE handle;
12         char tmp[260], *beg, *dot;
13         char fail[300];
14         ULONG rc;
15
16         if ((rc = DosLoadModule(fail, sizeof fail, path, &handle)) == 0)
17                 return (void *)handle;
18
19         retcode = rc;
20
21         /* Not found. Check for non-FAT name and try truncated name. */
22         /* Don't know if this helps though... */
23         for (beg = dot = path + strlen(path);
24              beg > path && !strchr(":/\\", *(beg-1));
25              beg--)
26                 if (*beg == '.')
27                         dot = beg;
28         if (dot - beg > 8) {
29                 int n = beg+8-path;
30                 memmove(tmp, path, n);
31                 memmove(tmp+n, dot, strlen(dot)+1);
32                 if (DosLoadModule(fail, sizeof fail, tmp, &handle) == 0)
33                         return (void *)handle;
34         }
35
36         return NULL;
37 }
38
39 void *
40 dlsym(void *handle, char *symbol)
41 {
42         ULONG rc, type;
43         PFN addr;
44
45         rc = DosQueryProcAddr((HMODULE)handle, 0, symbol, &addr);
46         if (rc == 0) {
47                 rc = DosQueryProcType((HMODULE)handle, 0, symbol, &type);
48                 if (rc == 0 && type == PT_32BIT)
49                         return (void *)addr;
50                 rc = ERROR_CALL_NOT_IMPLEMENTED;
51         }
52         retcode = rc;
53         return NULL;
54 }
55
56 char *
57 dlerror(void)
58 {
59         static char buf[300];
60         ULONG len;
61
62         if (retcode == 0)
63                 return NULL;
64         if (DosGetMessage(NULL, 0, buf, sizeof buf - 1, retcode, "OSO001.MSG", &len))
65                 sprintf(buf, "OS/2 system error code %d", retcode);
66         else
67                 buf[len] = '\0';
68         retcode = 0;
69         return buf;
70 }
71