/**************************************************************************** * Copyright (c) 1998-2001,2002 Free Software Foundation, Inc.              * *                                                                          * * Permission is hereby granted, free of charge, to any person obtaining a  * * copy of this software and associated documentation files (the            * * "Software"), to deal in the Software without restriction, including      * * without limitation the rights to use, copy, modify, merge, publish,      * * distribute, distribute with modifications, sublicense, and/or sell       * * copies of the Software, and to permit persons to whom the Software is    * * furnished to do so, subject to the following conditions:                 * *                                                                          * * The above copyright notice and this permission notice shall be included  * * in all copies or substantial portions of the Software.                   * *                                                                          * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  * * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               * * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   * * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   * * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    * * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    * * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               * *                                                                          * * Except as contained in this notice, the name(s) of the above copyright   * * holders shall not be used in advertising or otherwise to promote the     * * sale, use or other dealings in this Software without prior written       * * authorization.                                                           * ****************************************************************************//**************************************************************************** *  State-machine fallback written by Thomas E. Dickey 2002                 * ****************************************************************************//* * This function is needed to support vwscanw */#include <curses.priv.h>#if !HAVE_VSSCANFMODULE_ID("$Id: vsscanf.c,v 1.17 2003/05/24 21:10:28 tom Exp $")#if !(HAVE_VFSCANF || HAVE__DOSCAN)#include <ctype.h>#define L_SQUARE '['#define R_SQUARE ']'typedef enum {    cUnknown    ,cError			/* anything that isn't ANSI */    ,cAssigned    ,cChar    ,cInt    ,cFloat    ,cDouble    ,cPointer    ,cLong    ,cShort    ,cRange    ,cString} ChunkType;typedef enum {    oUnknown    ,oShort    ,oLong} OtherType;typedef enum {    sUnknown    ,sPercent			/* last was '%' beginning a format */    ,sNormal			/* ...somewhere in the middle */    ,sLeft			/* last was left square bracket beginning a range */    ,sRange			/* ...somewhere in the middle */    ,sFinal			/* last finished a format */} ScanState;static ChunkTypefinal_ch(int ch, OtherType other){    ChunkType result = cUnknown;    switch (ch) {    case 'c':	if (other == oUnknown)	    result = cChar;	else	    result = cError;	break;    case 'd':    case 'i':    case 'X':    case 'x':	switch (other) {	case oUnknown:	    result = cInt;	    break;	case oShort:	    result = cShort;	    break;	case oLong:	    result = cLong;	    break;	}	break;    case 'E':    case 'e':    case 'f':    case 'g':	switch (other) {	case oUnknown:	    result = cFloat;	    break;	case oShort:	    result = cError;	    break;	case oLong:	    result = cDouble;	    break;	}	break;    case 'n':	if (other == oUnknown)	    result = cAssigned;	else	    result = cError;	break;    case 'p':	if (other == oUnknown)	    result = cPointer;	else	    result = cError;	break;    case 's':	if (other == oUnknown)	    result = cString;	else	    result = cError;	break;    }    return result;}static OtherTypeother_ch(int ch){    OtherType result = oUnknown;    switch (ch) {    case 'h':	result = oShort;	break;    case 'l':	result = oLong;	break;    }    return result;}#endif/*VARARGS2*/NCURSES_EXPORT(int)vsscanf(const char *str, const char *format, va_list ap){#if HAVE_VFSCANF || HAVE__DOSCAN    /*     * This code should work on anything descended from AT&T SVr1.     */    FILE strbuf;    strbuf._flag = _IOREAD;    strbuf._ptr = strbuf._base = (unsigned char *) str;    strbuf._cnt = strlen(str);    strbuf._file = _NFILE;#if HAVE_VFSCANF    return (vfscanf(&strbuf, format, ap));#else    return (_doscan(&strbuf, format, ap));#endif#else    static int can_convert = -1;    int assigned = 0;    int consumed = 0;    T((T_CALLED("vsscanf(%s,%s,...)"),       _nc_visbuf2(1, str),       _nc_visbuf2(2, format)));    /*     * This relies on having a working "%n" format conversion.  Check if it     * works.  Only very old C libraries do not support it.     *     * FIXME: move this check into the configure script.     */    if (can_convert < 0) {	int check1;	int check2;	if (sscanf("123", "%d%n", &check1, &check2) > 0	    && check1 == 123	    && check2 == 3) {	    can_convert = 1;	} else {	    can_convert = 0;	}    }    if (can_convert) {	size_t len_fmt = strlen(format) + 32;	char *my_fmt = malloc(len_fmt);	ChunkType chunk, ctest;	OtherType other, otest;	ScanState state;	unsigned n;	int eaten;	void *pointer;	if (my_fmt != 0) {	    /*	     * Split the original format into chunks, adding a "%n" to the end	     * of each (except of course if it used %n), and use that	     * information to decide where to start scanning the next chunk.	     *	     * FIXME:  does %n count bytes or characters?  If the latter, this	     * will require further work for multibyte strings.	     */	    while (*format != '\0') {		/* find a chunk */		state = sUnknown;		chunk = cUnknown;		other = oUnknown;		pointer = 0;		for (n = 0; format[n] != 0 && state != sFinal; ++n) {		    my_fmt[n] = format[n];		    switch (state) {		    case sUnknown:			if (format[n] == '%')			    state = sPercent;			break;		    case sPercent:			if (format[n] == '%') {			    state = sUnknown;			} else if (format[n] == L_SQUARE) {			    state = sLeft;			} else {			    state = sNormal;			    --n;			}			break;		    case sLeft:			state = sRange;			if (format[n] == '^') {			    ++n;			    my_fmt[n] = format[n];			}			break;		    case sRange:			if (format[n] == R_SQUARE) {			    state = sFinal;			    chunk = cRange;			}			break;		    case sNormal:			if (format[n] == '*') {			    state = sUnknown;			} else {			    if ((ctest = final_ch(format[n], other)) != cUnknown) {				state = sFinal;				chunk = ctest;			    } else if ((otest = other_ch(format[n])) != oUnknown) {				other = otest;			    } else if (isalpha(format[n])) {				state = sFinal;				chunk = cError;			    }			}			break;		    case sFinal:			break;		    }		}		my_fmt[n] = '\0';		format += n;		if (chunk == cUnknown		    || chunk == cError) {		    if (assigned == 0)			assigned = EOF;		    break;		}		/* add %n, if the format was not that */		if (chunk != cAssigned) {		    strcat(my_fmt, "%n");		}		switch (chunk) {		case cAssigned:		    strcat(my_fmt, "%n");		    pointer = &eaten;		    break;		case cInt:		    pointer = va_arg(ap, int *);		    break;		case cShort:		    pointer = va_arg(ap, short *);		    break;		case cFloat:		    pointer = va_arg(ap, float *);		    break;		case cDouble:		    pointer = va_arg(ap, double *);		    break;		case cLong:		    pointer = va_arg(ap, long *);		    break;		case cPointer:		    pointer = va_arg(ap, void *);		    break;		case cChar:		case cRange:		case cString:		    pointer = va_arg(ap, char *);		    break;		case cError:		case cUnknown:		    break;		}		/* do the conversion */		T(("...converting chunk #%d type %d(%s,%s)",		   assigned + 1, chunk,		   _nc_visbuf2(1, str + consumed),		   _nc_visbuf2(2, my_fmt)));		if (sscanf(str + consumed, my_fmt, pointer, &eaten) > 0)		    consumed += eaten;		else		    break;		++assigned;	    }	    free(my_fmt);	}    }    returnCode(assigned);#endif}#elseexternNCURSES_EXPORT(void)_nc_vsscanf(void);		/* quiet's gcc warning */NCURSES_EXPORT(void)_nc_vsscanf(void){}				/* nonempty for strict ANSI compilers */#endif /* !HAVE_VSSCANF */