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#include "dlfcn.h"
#include "string.h"
#include "stdio.h"
#define INCL_BASE
#include <os2.h>
static ULONG retcode;
static char fail[300];
char *os2error(int rc);
void *
dlopen(const char *path, int mode)
{
HMODULE handle;
char tmp[260], *beg, *dot;
ULONG rc;
fail[0] = 0;
if ((rc = DosLoadModule(fail, sizeof fail, (char*)path, &handle)) == 0)
return (void *)handle;
retcode = rc;
if (strlen(path) >= sizeof(tmp))
return NULL;
/* Not found. Check for non-FAT name and try truncated name. */
/* Don't know if this helps though... */
for (beg = dot = path + strlen(path);
beg > path && !strchr(":/\\", *(beg-1));
beg--)
if (*beg == '.')
dot = beg;
if (dot - beg > 8) {
int n = beg+8-path;
memmove(tmp, path, n);
memmove(tmp+n, dot, strlen(dot)+1);
if (DosLoadModule(fail, sizeof fail, tmp, &handle) == 0)
return (void *)handle;
}
return NULL;
}
void *
dlsym(void *handle, const char *symbol)
{
ULONG rc, type;
PFN addr;
fail[0] = 0;
rc = DosQueryProcAddr((HMODULE)handle, 0, symbol, &addr);
if (rc == 0) {
rc = DosQueryProcType((HMODULE)handle, 0, symbol, &type);
if (rc == 0 && type == PT_32BIT)
return (void *)addr;
rc = ERROR_CALL_NOT_IMPLEMENTED;
}
retcode = rc;
return NULL;
}
char *
dlerror(void)
{
static char buf[700];
ULONG len;
char *err;
if (retcode == 0)
return NULL;
err = os2error(retcode);
len = strlen(err);
if (len > sizeof(buf) - 1)
len = sizeof(buf) - 1;
strncpy(buf, err, len+1);
if (fail[0] && len < 300)
sprintf(buf + len, ", possible problematic module: '%s'", fail);
retcode = 0;
return buf;
}
int
dlclose(void *handle)
{
ULONG rc;
if ((rc = DosFreeModule((HMODULE)handle)) == 0) return 0;
retcode = rc;
return 2;
}
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