File: [local] / OpenXM_contrib / pari-2.2 / src / systems / Attic / os2.c (download)
Revision 1.1, Wed Sep 11 07:27:07 2002 UTC (21 years, 11 months ago) by noro
Branch: MAIN
CVS Tags: RELEASE_1_2_3, RELEASE_1_2_2_KNOPPIX_b, RELEASE_1_2_2_KNOPPIX, RELEASE_1_2_2
Upgraded pari-2.2 to pari-2.2.4.
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#include "dlfcn.h"
#define INCL_BASE
#include <os2.h>
#include <float.h>
static ULONG retcode;
static char fail[300];
static ULONG dllHandle;
static char dllname[80];
static int handle_found;
static int handle_loaded;
#ifdef DLOPEN_INITTERM
unsigned long _DLL_InitTerm(unsigned long modHandle, unsigned long flag)
{
switch (flag) {
case 0: /* INIT */
/* Save handle */
dllHandle = modHandle;
handle_found = 1;
return TRUE;
case 1: /* TERM */
handle_found = 0;
dllHandle = (unsigned long)NULLHANDLE;
return TRUE;
}
return FALSE;
}
#endif
void *
dlopen(char *path, int mode)
{
HMODULE handle;
char tmp[260], *beg, *dot;
ULONG rc;
unsigned fpflag = _control87(0,0);
fail[0] = 0;
if (!path) { /* Our own handle. */
if (handle_found) {
if (handle_loaded)
return (void*)dllHandle;
rc = DosQueryModuleName(dllHandle, sizeof(dllname), dllname);
if (rc) {
strcpy(fail, "can't find my DLL name by the handle");
return 0;
}
rc = DosLoadModule(fail, sizeof fail, dllname, &handle);
if (rc) {
strcpy(fail, "can't load my own DLL");
return 0;
}
handle_loaded = 1;
goto ret;
}
strcpy(fail, "can't load from myself: compiled without -DDLOPEN_INITTERM");
return 0;
}
if ((rc = DosLoadModule(fail, sizeof fail, path, &handle)) == 0)
goto ret;
retcode = rc;
/* 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)
goto ret;
}
handle = 0;
ret:
_control87(fpflag, MCW_EM); /* Some modules reset FP flags on load */
return (void *)handle;
}
void *
dlsym(void *handle, 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;
if (retcode == 0)
return NULL;
if (DosGetMessage(NULL, 0, buf, sizeof buf - 1, retcode,
"OSO001.MSG", &len)) {
if (fail[0])
sprintf(buf,
"OS/2 system error code %d, possible problematic module: '%s'",
(int)retcode, fail);
else
sprintf(buf, "OS/2 system error code %d", (int)retcode);
} else {
buf[len] = '\0';
if (len && buf[len - 1] == '\n')
buf[--len] = 0;
if (len && buf[len - 1] == '\r')
buf[--len] = 0;
if (len && buf[len - 1] == '.')
buf[--len] = 0;
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;
}