podcheck.t: Need to translate E<lt> and E<gt>

[perl5.git] / os2 / dl_os2.c

diff --git a/os2/dl_os2.c b/os2/dl_os2.c
index aab48dd..76fa9dc 100644 (file)
--- a/os2/dl_os2.c
+++ b/os2/dl_os2.c
@@ -1,24 +1,123 @@
 #include "dlfcn.h"
+#include "string.h"
+#include "stdio.h"
 
 #define INCL_BASE
 #include <os2.h>
+#include <float.h>
+#include <stdlib.h>
 
 static ULONG retcode;
 static char fail[300];
 
+static ULONG dllHandle;
+static int handle_found;
+static int handle_loaded;
+#ifdef PERL_CORE
+
+#include "EXTERN.h"
+#include "perl.h"
+
+#else
+
+char *os2error(int rc);
+
+#endif
+
+#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
+
+HMODULE
+find_myself(void)
+{
+
+  static APIRET APIENTRY (*pDosQueryModFromEIP) (HMODULE * hmod, ULONG * obj, ULONG BufLen, PCHAR Buf,
+                   ULONG * Offset, ULONG Address);
+  HMODULE doscalls_h, mod;
+  static int failed;
+  ULONG obj, offset, rc;
+  char buf[260];
+
+  if (failed)
+       return 0;
+  failed = 1;
+  doscalls_h = (HMODULE)dlopen("DOSCALLS",0);
+  if (!doscalls_h)
+       return 0;
+/*  {&doscalls_handle, NULL, 360}, */  /* DosQueryModFromEIP */
+  rc = DosQueryProcAddr(doscalls_h, 360, 0, (PFN*)&pDosQueryModFromEIP);
+  if (rc)
+       return 0;
+  rc = pDosQueryModFromEIP(&mod, &obj, sizeof(buf), buf, &offset, (ULONG)dlopen);
+  if (rc)
+       return 0;
+  failed = 0;
+  handle_found = 1;
+  dllHandle = mod;
+  return mod;
+}
+
 void *
-dlopen(char *path, int mode)
+dlopen(const char *path, int mode)
 {
        HMODULE handle;
-       char tmp[260], *beg, *dot;
+       char tmp[260];
+       const char *beg, *dot;
        ULONG rc;
+       unsigned fpflag = _control87(0,0);
 
        fail[0] = 0;
-       if ((rc = DosLoadModule(fail, sizeof fail, path, &handle)) == 0)
-               return (void *)handle;
+       if (!path) {                    /* Our own handle. */
+           if (handle_found || find_myself()) {
+               char dllname[260];
+
+               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");
+                   retcode = rc;
+                   return 0;
+               }
+               rc = DosLoadModule(fail, sizeof fail, dllname, &handle);
+               if (rc) {
+                   strcpy(fail, "can't load my own DLL");
+                   retcode = rc;
+                   return 0;
+               }
+               handle_loaded = 1;
+               goto ret;
+           }
+           retcode = ERROR_MOD_NOT_FOUND;
+            strcpy(fail, "can't load from myself: compiled without -DDLOPEN_INITTERM");
+           return 0;
+       }
+       if ((rc = DosLoadModule(fail, sizeof fail, (char*)path, &handle)) == 0)
+               goto ret;
 
        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);
@@ -28,17 +127,23 @@ dlopen(char *path, int mode)
                        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;
+                   goto ret;
        }
+       handle = 0;
 
-       return NULL;
+      ret:
+       _control87(fpflag, MCW_EM); /* Some modules reset FP flags on load */
+       return (void *)handle;
 }
 
+#define ERROR_WRONG_PROCTYPE 0xffffffff
+
 void *
-dlsym(void *handle, char *symbol)
+dlsym(void *handle, const char *symbol)
 {
        ULONG rc, type;
        PFN addr;
@@ -49,7 +154,7 @@ dlsym(void *handle, char *symbol)
                rc = DosQueryProcType((HMODULE)handle, 0, symbol, &type);
                if (rc == 0 && type == PT_32BIT)
                        return (void *)addr;
-               rc = ERROR_CALL_NOT_IMPLEMENTED;
+               rc = ERROR_WRONG_PROCTYPE;
        }
        retcode = rc;
        return NULL;
@@ -60,29 +165,20 @@ dlerror(void)
 {
        static char buf[700];
        ULONG len;
+       char *err;
 
        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'",
-                         retcode, fail);
-               else
-                 sprintf(buf, "OS/2 system error code %d", 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);
-       }
+       if (retcode == ERROR_WRONG_PROCTYPE)
+           err = "Wrong procedure type";
+       else
+           err = os2error(retcode);
+       len = strlen(err);
+       if (len > sizeof(buf) - 1)
+           len = sizeof(buf) - 1;
+       strncpy(buf, err, len+1);
+       if (fail[0] && len + strlen(fail) < sizeof(buf) - 100)
+           sprintf(buf + len, ", possible problematic module: '%s'", fail);
        retcode = 0;
        return buf;
 }