#include <math.h>

/*
 * The following constants are used by GetFormatSpec to indicate various
 * special conditions in the parsing of a format specifier.
 */

#define BINARY_ALL ((size_t)-1)	/* Use all elements in the argument. */
#define BINARY_NOCOUNT ((size_t)-2)
				/* No count was specified in format. */

/*
 * The following flags may be ORed together and returned by GetFormatSpec
 */

#define BINARY_SIGNED 0		/* Field to be read as signed data */
#define BINARY_UNSIGNED 1	/* Field to be read as unsigned data */

 */

static void
DupByteArrayInternalRep(
    Tcl_Obj *srcPtr,		/* Object with internal rep to copy. */
    Tcl_Obj *copyPtr)		/* Object with internal rep to set. */
{
    size_t length;
    ByteArray *srcArrayPtr, *copyArrayPtr;

    srcArrayPtr = GET_BYTEARRAY(srcPtr);
    length = srcArrayPtr->used;

    copyArrayPtr = ckalloc(BYTEARRAY_SIZE(length));
    copyArrayPtr->used = length;

    length = byteArrayPtr->used;

    /*
     * How much space will string rep need?
     */

    size = length;
    for (i = 0; i < length; i++) {
	if ((src[i] == 0) || (src[i] > 127)) {
	    size++;
	}
    }
    if (size < length) {
	Tcl_Panic("max size for a Tcl value (%d bytes) exceeded", INT_MAX);
    }

    dst = ckalloc(size + 1);
    objPtr->bytes = dst;
    objPtr->length = size;

    size_t len)
{
    ByteArray *byteArrayPtr;

    if (Tcl_IsShared(objPtr)) {
	Tcl_Panic("%s called with shared object","TclAppendBytesToByteArray");
    }
    if (len == TCL_STRLEN) {
	Tcl_Panic("%s must be called with definite number of bytes to append",
		"TclAppendBytesToByteArray");
    }
    if (objPtr->typePtr != &tclByteArrayType) {
	SetByteArrayFromAny(NULL, objPtr);
    }
    byteArrayPtr = GET_BYTEARRAY(objPtr);

static int
BinaryFormatCmd(
    ClientData dummy,		/* Not used. */
    Tcl_Interp *interp,		/* Current interpreter. */
    size_t objc,		/* Number of arguments. */
    Tcl_Obj *const objv[])	/* Argument objects. */
{
    size_t arg;			/* Index of next argument to consume. */
    int value = 0;		/* Current integer value to be packed.
				 * Initialized to avoid compiler warning. */
    char cmd;			/* Current format character. */
    size_t count;		/* Count associated with current format
				 * character. */
    int flags;			/* Format field flags */
    const char *format;	/* Pointer to current position in format
				 * string. */
    Tcl_Obj *resultPtr = NULL;	/* Object holding result buffer. */
    unsigned char *buffer;	/* Start of result buffer. */
    unsigned char *cursor;	/* Current position within result buffer. */
    unsigned char *maxPos;	/* Greatest position within result buffer that
				 * cursor has visited.*/
    const char *errorString;
    const char *errorValue, *str;
    int size;
    size_t length, offset;

    if (objc < 2) {
	Tcl_WrongNumArgs(interp, 1, objv, "formatString ?arg ...?");
	return TCL_ERROR;
    }

    /*

	case 'X':
	    if (cursor > maxPos) {
		maxPos = cursor;
	    }
	    if (count == BINARY_NOCOUNT) {
		count = 1;
	    }
	    if ((count == BINARY_ALL)
		    || (count > (size_t) (cursor - buffer))) {
		cursor = buffer;
	    } else {
		cursor -= count;
	    }
	    break;
	case '@':
	    if (cursor > maxPos) {

int
BinaryScanCmd(
    ClientData dummy,		/* Not used. */
    Tcl_Interp *interp,		/* Current interpreter. */
    size_t objc,		/* Number of arguments. */
    Tcl_Obj *const objv[])	/* Argument objects. */
{
    size_t arg;			/* Index of next argument to consume. */
    int value = 0;		/* Current integer value to be packed.
				 * Initialized to avoid compiler warning. */
    char cmd;			/* Current format character. */
    size_t count;		/* Count associated with current format
				 * character. */
    int flags;			/* Format field flags */
    const char *format;	/* Pointer to current position in format
				 * string. */
    Tcl_Obj *resultPtr = NULL;	/* Object holding result buffer. */
    unsigned char *buffer;	/* Start of result buffer. */
    const char *errorString;
    const char *str;

    size_t length, offset, size, i;


    Tcl_Obj *valuePtr, *elementPtr;
    Tcl_HashTable numberCacheHash;
    Tcl_HashTable *numberCachePtr;

    if (objc < 3) {
	Tcl_WrongNumArgs(interp, 1, objv,
		"value formatString ?varName ...?");

    }

    /*
     * Set the result to the last position of the cursor.
     */

 done:
    Tcl_SetObjResult(interp, Tcl_NewLongObj((long) arg - 3));
    DeleteScanNumberCache(numberCachePtr);

    return TCL_OK;

 badCount:
    errorString = "missing count for \"@\" field specifier";
    goto error;

    Tcl_Interp *interp,
    size_t objc,
    Tcl_Obj *const objv[])
{
    Tcl_Obj *resultObj = NULL;
    unsigned char *data, *datastart, *dataend;
    unsigned char *begin, *cursor, c;
    int index, value, strict = 0;
    size_t i, size, count = 0, cut = 0;
    enum {OPT_STRICT };
    static const char *const optStrings[] = { "-strict", NULL };

    if (objc < 2 || objc > 3) {
	Tcl_WrongNumArgs(interp, 1, objv, "data");
	return TCL_ERROR;
    }

	}
	*cursor++ = UCHAR(value);
	value = 0;
    }
    if (cut > size) {
	cut = size;
    }
    Tcl_SetByteArrayLength(resultObj, (size_t) (cursor - begin - cut));
    Tcl_SetObjResult(interp, resultObj);
    return TCL_OK;

  badChar:
    TclDecrRefCount(resultObj);
    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
	    "invalid hexadecimal digit \"%c\" at position %d",

    Tcl_Interp *interp,
    size_t objc,
    Tcl_Obj *const objv[])
{
    Tcl_Obj *resultObj;
    unsigned char *data, *cursor, *limit;
    const char *digits = clientData;
    size_t maxlen = 0, wrapcharlen = 1, count = 0, outindex = 0;
    size_t i, size, offset;
    const char *wrapchar = "\n";

    int index, len;
    enum {OPT_MAXLEN, OPT_WRAPCHAR };
    static const char *const optStrings[] = { "-maxlen", "-wrapchar", NULL };

    if (objc < 2 || objc%2 != 0) {
	Tcl_WrongNumArgs(interp, 1, objv,
		"?-maxlen len? ?-wrapchar char? data");
	return TCL_ERROR;
    }
    for (i = 1; i < objc-1; i += 2) {
	if (Tcl_GetIndexFromObj(interp, objv[i], optStrings, "option",
		TCL_EXACT, &index) != TCL_OK) {
	    return TCL_ERROR;
	}
	switch (index) {
	case OPT_MAXLEN:
	    if (Tcl_GetIntFromObj(interp, objv[i+1], &len) != TCL_OK) {
		return TCL_ERROR;
	    }
	    if (len < 1) {
		Tcl_SetObjResult(interp, Tcl_NewStringObj(
			"maximum length must be positive", TCL_STRLEN));
		return TCL_ERROR;
	    }
	    maxlen = (size_t) len;
	    break;
	case OPT_WRAPCHAR:
	    wrapchar = Tcl_GetStringFromObj(objv[i+1], &wrapcharlen);
	    if (wrapcharlen == 0) {
		maxlen = 0;
	    }
	    break;

    Tcl_Interp *interp,
    size_t objc,
    Tcl_Obj *const objv[])
{
    Tcl_Obj *resultObj = NULL;
    unsigned char *data, *datastart, *dataend;
    unsigned char *begin, *cursor;
    int index, strict = 0;
    size_t i, count = 0, size, cut = 0;
    char c;
    enum {OPT_STRICT };
    static const char *const optStrings[] = { "-strict", NULL };

    if (objc < 2 || objc > 3) {
	Tcl_WrongNumArgs(interp, 1, objv, "data");
	return TCL_ERROR;

		| (((d[2] - 0x20) & 0x3f) >> 2);
	*cursor++ = (((d[2] - 0x20) & 0x3f) << 6)
		| (((d[3] - 0x20) & 0x3f));
    }
    if (cut > size) {
	cut = size;
    }
    Tcl_SetByteArrayLength(resultObj, (size_t)(cursor - begin - cut));
    Tcl_SetObjResult(interp, resultObj);
    return TCL_OK;

  badUu:
    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
	    "invalid uuencode character \"%c\" at position %d",
	    c, (int) (data - datastart - 1)));

    Tcl_Interp *interp,
    size_t objc,
    Tcl_Obj *const objv[])
{
    Tcl_Obj *resultObj = NULL;
    unsigned char *data, *datastart, *dataend, c = '\0';
    unsigned char *begin = NULL, *cursor = NULL;
    int strict = 0, index;

    size_t i, count = 0, size, cut = 0;
    enum { OPT_STRICT };
    static const char *const optStrings[] = { "-strict", NULL };

    if (objc < 2 || objc > 3) {
	Tcl_WrongNumArgs(interp, 1, objv, "data");
	return TCL_ERROR;
    }