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/*
* tkimg.c --
*
* Generic interface to XML parsers.
*
* Copyright (c) 2002 Andreas Kupries <andreas_kupries@users.sourceforge.net>
*
* Zveno Pty Ltd makes this software and associated documentation
* available free of charge for any purpose. You may make copies
* of the software but you must include all of this notice on any copy.
*
* Zveno Pty Ltd does not warrant that this software is error free
* or fit for any purpose. Zveno Pty Ltd disclaims any liability for
* all claims, expenses, losses, damages and costs any user may incur
* as a result of using, copying or modifying the software.
*
* $Id: tkimg.c 274 2010-06-28 13:23:34Z nijtmans $
*
*/
#include "tkimg.h"
MODULE_SCOPE const TkimgStubs tkimgStubs;
/*
* Declarations for externally visible functions.
*/
#ifdef ALLOW_B64
static int tob64(void *clientData, Tcl_Interp *interp,
int argc, Tcl_Obj *const objv[]);
static int fromb64(void *clientData, Tcl_Interp *interp,
int argc, Tcl_Obj *const objv[]);
#endif
/*
*----------------------------------------------------------------------------
*
* Tkimg_Init --
*
* Initialisation routine for loadable module
*
* Results:
* None.
*
* Side effects:
* Creates commands in the interpreter,
* loads xml package.
*
*----------------------------------------------------------------------------
*/
int Tkimg_Init(
Tcl_Interp *interp /* Interpreter to initialise. */
) {
if (!Tcl_InitStubs(interp, "8.3", 0)) {
return TCL_ERROR;
}
if (!Tk_InitStubs(interp, "8.3", 0)) {
return TCL_ERROR;
}
TkimgInitUtilities(interp);
#ifdef ALLOW_B64 /* Undocumented feature */
Tcl_CreateObjCommand(interp, "img_to_base64", tob64, NULL, NULL);
Tcl_CreateObjCommand(interp, "img_from_base64", fromb64, NULL, NULL);
#endif
if (Tcl_PkgProvideEx(interp, PACKAGE_TCLNAME, PACKAGE_VERSION,
(void *)&tkimgStubs) != TCL_OK
) {
return TCL_ERROR;
}
return TCL_OK;
}
/*
*----------------------------------------------------------------------------
*
* Tkimg_SafeInit --
*
* Initialisation routine for loadable module in a safe interpreter.
*
* Results:
* None.
*
* Side effects:
* Creates commands in the interpreter,
* loads xml package.
*
*----------------------------------------------------------------------------
*/
int Tkimg_SafeInit(
Tcl_Interp *interp /* Interpreter to initialise. */
) {
return Tkimg_Init(interp);
}
/*
*-------------------------------------------------------------------------
* tob64 --
* This function converts the contents of a file into a base-64
* encoded string.
*
* Results:
* none
*
* Side effects:
* none
*
*-------------------------------------------------------------------------
*/
#ifdef ALLOW_B64
int tob64(
void *clientData,
Tcl_Interp *interp,
int argc,
Tcl_Obj *const objv[]
) {
Tcl_DString dstring;
tkimg_MFile handle;
Tcl_Channel chan;
char buffer[1024];
int len;
if (argc != 2) {
Tcl_WrongNumArgs(interp, 1, objv, "filename");
return TCL_ERROR;
}
chan = tkimg_OpenFileChannel(interp, Tcl_GetStringFromObj(objv[1], &len), 0);
if (!chan) {
return TCL_ERROR;
}
Tcl_DStringInit(&dstring);
tkimg_WriteInit(&dstring, &handle);
while ((len = Tcl_Read(chan, buffer, 1024)) == 1024) {
tkimg_Write(&handle, buffer, 1024);
}
if (len > 0) {
tkimg_Write(&handle, buffer, len);
}
if ((Tcl_Close(interp, chan) == TCL_ERROR) || (len < 0)) {
Tcl_DStringFree(&dstring);
Tcl_AppendResult(interp, Tcl_GetStringFromObj(objv[1], &len),
": ", Tcl_PosixError(interp), NULL);
return TCL_ERROR;
}
tkimg_Putc(IMG_DONE, &handle);
Tcl_DStringResult(interp, &dstring);
return TCL_OK;
}
/*
*-------------------------------------------------------------------------
* fromb64 --
* This function converts a base-64 encoded string into binary form,
* which is written to a file.
*
* Results:
* none
*
* Side effects:
* none
*
*-------------------------------------------------------------------------
*/
int fromb64(
void *clientData,
Tcl_Interp *interp,
int argc,
Tcl_Obj *const objv[]
) {
tkimg_MFile handle;
Tcl_Channel chan;
char buffer[1024];
int len;
if (argc != 3) {
Tcl_WrongNumArgs(interp, 1, objv, "filename data");
return TCL_ERROR;
}
chan = tkimg_OpenFileChannel(interp, Tcl_GetStringFromObj(objv[1], &len), 0644);
if (!chan) {
return TCL_ERROR;
}
handle.data = Tcl_GetStringFromObj(objv[2], &handle.length);
handle.state = 0;
while ((len = tkimg_Read(&handle, buffer, 1024)) == 1024) {
if (Tcl_Write(chan, buffer, 1024) != 1024) {
goto writeerror;
}
}
if (len > 0) {
if (Tcl_Write(chan, buffer, len) != len) {
goto writeerror;
}
}
if (Tcl_Close(interp, chan) == TCL_ERROR) {
return TCL_ERROR;
}
return TCL_OK;
writeerror:
Tcl_AppendResult(interp, Tcl_GetStringFromObj(objv[1], &len), ": ",
Tcl_PosixError(interp), NULL);
return TCL_ERROR;
}
#endif
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