Initial revision

FossilOrigin-Name: f86c34e38d2a946e0ed196001fd756c57f90791a

1 files changed, 114 insertions, 0 deletions

diff --git a/win/tclWinLoad.c b/win/tclWinLoad.c
new file mode 100644
index 0000000..8106671
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+/* 
+ * tclWinLoad.c --
+ *
+ *	This procedure provides a version of the TclLoadFile that
+ *	works with the Windows "LoadLibrary" and "GetProcAddress"
+ *	API for dynamic loading.
+ *
+ * Copyright (c) 1995 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ *
+ * SCCS: @(#) tclWinLoad.c 1.6 96/02/15 11:54:07
+ */
+
+#include "tclInt.h"
+#include "tclPort.h"
+
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclLoadFile --
+ *
+ *	Dynamically loads a binary code file into memory and returns
+ *	the addresses of two procedures within that file, if they
+ *	are defined.
+ *
+ * Results:
+ *	A standard Tcl completion code.  If an error occurs, an error
+ *	message is left in interp->result.
+ *
+ * Side effects:
+ *	New code suddenly appears in memory.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclLoadFile(interp, fileName, sym1, sym2, proc1Ptr, proc2Ptr)
+    Tcl_Interp *interp;		/* Used for error reporting. */
+    char *fileName;		/* Name of the file containing the desired
+				 * code. */
+    char *sym1, *sym2;		/* Names of two procedures to look up in
+				 * the file's symbol table. */
+    Tcl_PackageInitProc **proc1Ptr, **proc2Ptr;
+				/* Where to return the addresses corresponding
+				 * to sym1 and sym2. */
+{
+    HINSTANCE handle;
+    char *buffer;
+
+    handle = TclWinLoadLibrary(fileName);
+    if (handle == NULL) {
+	Tcl_AppendResult(interp, "couldn't load file \"", fileName,
+		"\": ", Tcl_PosixError(interp), (char *) NULL);
+	return TCL_ERROR;
+    }
+
+    /*
+     * For each symbol, check for both Symbol and _Symbol, since Borland
+     * generates C symbols with a leading '_' by default.
+     */
+
+    *proc1Ptr = (Tcl_PackageInitProc *) GetProcAddress(handle, sym1);
+    if (*proc1Ptr == NULL) {
+	buffer = ckalloc(strlen(sym1)+2);
+	buffer[0] = '_';
+	strcpy(buffer+1, sym1);
+	*proc1Ptr = (Tcl_PackageInitProc *) GetProcAddress(handle, buffer);
+	ckfree(buffer);
+    }
+    
+    *proc2Ptr = (Tcl_PackageInitProc *) GetProcAddress(handle, sym2);
+    if (*proc2Ptr == NULL) {
+	buffer = ckalloc(strlen(sym2)+2);
+	buffer[0] = '_';
+	strcpy(buffer+1, sym2);
+	*proc2Ptr = (Tcl_PackageInitProc *) GetProcAddress(handle, buffer);
+	ckfree(buffer);
+    }
+    
+    return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclGuessPackageName --
+ *
+ *	If the "load" command is invoked without providing a package
+ *	name, this procedure is invoked to try to figure it out.
+ *
+ * Results:
+ *	Always returns 0 to indicate that we couldn't figure out a
+ *	package name;  generic code will then try to guess the package
+ *	from the file name.  A return value of 1 would have meant that
+ *	we figured out the package name and put it in bufPtr.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclGuessPackageName(fileName, bufPtr)
+    char *fileName;		/* Name of file containing package (already
+				 * translated to local form if needed). */
+    Tcl_DString *bufPtr;	/* Initialized empty dstring.  Append
+				 * package name to this if possible. */
+{
+    return 0;
+}