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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcurses/base/vsscanf.c	Lines:	0	1	0.0 %
Date:	2017-11-07	Branches:	0	0	0.0 %


/* $OpenBSD: vsscanf.c,v 1.2 2015/09/27 05:25:00 guenther Exp $ */

/****************************************************************************
 * Copyright (c) 1998-2003,2004 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_VSSCANF

MODULE_ID("$Id: vsscanf.c,v 1.2 2015/09/27 05:25:00 guenther 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 ChunkType
final_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 OtherType
other_ch(int ch)
{
    OtherType result = oUnknown;
    switch (ch) {
    case 'h':
	result = oShort;
	break;
    case 'l':
	result = oLong;
	break;
    }
    return result;
}
#endif

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(UChar(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) {
		    strlcat(my_fmt, "%n", len_fmt);
		}

		switch (chunk) {
		case cAssigned:
		    strlcat(my_fmt, "%n", len_fmt);
		    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
}
#else
extern
NCURSES_EXPORT(void)
_nc_vsscanf(void);		/* quiet's gcc warning */
NCURSES_EXPORT(void)
_nc_vsscanf(void)
{
}				/* nonempty for strict ANSI compilers */
#endif /* !HAVE_VSSCANF */


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: vsscanf.c,v 1.2 2015/09/27 05:25:00 guenther Exp $ */
2
3			/****************************************************************************
4			* Copyright (c) 1998-2003,2004 Free Software Foundation, Inc. *
5			* *
6			* Permission is hereby granted, free of charge, to any person obtaining a *
7			* copy of this software and associated documentation files (the *
8			* "Software"), to deal in the Software without restriction, including *
9			* without limitation the rights to use, copy, modify, merge, publish, *
10			* distribute, distribute with modifications, sublicense, and/or sell *
11			* copies of the Software, and to permit persons to whom the Software is *
12			* furnished to do so, subject to the following conditions: *
13			* *
14			* The above copyright notice and this permission notice shall be included *
15			* in all copies or substantial portions of the Software. *
16			* *
17			* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
18			* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
19			* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
20			* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
21			* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
22			* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
23			* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
24			* *
25			* Except as contained in this notice, the name(s) of the above copyright *
26			* holders shall not be used in advertising or otherwise to promote the *
27			* sale, use or other dealings in this Software without prior written *
28			* authorization. *
29			****************************************************************************/
30
31			/****************************************************************************
32			* State-machine fallback written by Thomas E. Dickey 2002 *
33			****************************************************************************/
34
35			/*
36			* This function is needed to support vwscanw
37			*/
38
39			#include <curses.priv.h>
40
41			#if !HAVE_VSSCANF
42
43			MODULE_ID("$Id: vsscanf.c,v 1.2 2015/09/27 05:25:00 guenther Exp $")
44
45			#if !(HAVE_VFSCANF \|\| HAVE__DOSCAN)
46
47			#include <ctype.h>
48
49			#define L_SQUARE '['
50			#define R_SQUARE ']'
51
52			typedef enum {
53			cUnknown
54			,cError /* anything that isn't ANSI */
55			,cAssigned
56			,cChar
57			,cInt
58			,cFloat
59			,cDouble
60			,cPointer
61			,cLong
62			,cShort
63			,cRange
64			,cString
65			} ChunkType;
66
67			typedef enum {
68			oUnknown
69			,oShort
70			,oLong
71			} OtherType;
72
73			typedef enum {
74			sUnknown
75			,sPercent /* last was '%' beginning a format */
76			,sNormal /* ...somewhere in the middle */
77			,sLeft /* last was left square bracket beginning a range */
78			,sRange /* ...somewhere in the middle */
79			,sFinal /* last finished a format */
80			} ScanState;
81
82			static ChunkType
83			final_ch(int ch, OtherType other)
84			{
85			ChunkType result = cUnknown;
86
87			switch (ch) {
88			case 'c':
89			if (other == oUnknown)
90			result = cChar;
91			else
92			result = cError;
93			break;
94			case 'd':
95			case 'i':
96			case 'X':
97			case 'x':
98			switch (other) {
99			case oUnknown:
100			result = cInt;
101			break;
102			case oShort:
103			result = cShort;
104			break;
105			case oLong:
106			result = cLong;
107			break;
108			}
109			break;
110			case 'E':
111			case 'e':
112			case 'f':
113			case 'g':
114			switch (other) {
115			case oUnknown:
116			result = cFloat;
117			break;
118			case oShort:
119			result = cError;
120			break;
121			case oLong:
122			result = cDouble;
123			break;
124			}
125			break;
126			case 'n':
127			if (other == oUnknown)
128			result = cAssigned;
129			else
130			result = cError;
131			break;
132			case 'p':
133			if (other == oUnknown)
134			result = cPointer;
135			else
136			result = cError;
137			break;
138			case 's':
139			if (other == oUnknown)
140			result = cString;
141			else
142			result = cError;
143			break;
144			}
145			return result;
146			}
147
148			static OtherType
149			other_ch(int ch)
150			{
151			OtherType result = oUnknown;
152			switch (ch) {
153			case 'h':
154			result = oShort;
155			break;
156			case 'l':
157			result = oLong;
158			break;
159			}
160			return result;
161			}
162			#endif
163
164			NCURSES_EXPORT(int)
165			vsscanf(const char str, const char format, va_list ap)
166			{
167			#if HAVE_VFSCANF \|\| HAVE__DOSCAN
168			/*
169			* This code should work on anything descended from AT&T SVr1.
170			*/
171			FILE strbuf;
172
173			strbuf._flag = _IOREAD;
174			strbuf._ptr = strbuf._base = (unsigned char *) str;
175			strbuf._cnt = strlen(str);
176			strbuf._file = _NFILE;
177
178			#if HAVE_VFSCANF
179			return (vfscanf(&strbuf, format, ap));
180			#else
181			return (_doscan(&strbuf, format, ap));
182			#endif
183			#else
184			static int can_convert = -1;
185
186			int assigned = 0;
187			int consumed = 0;
188
189			T((T_CALLED("vsscanf(%s,%s,...)"),
190			_nc_visbuf2(1, str),
191			_nc_visbuf2(2, format)));
192
193			/*
194			* This relies on having a working "%n" format conversion. Check if it
195			* works. Only very old C libraries do not support it.
196			*
197			* FIXME: move this check into the configure script.
198			*/
199			if (can_convert < 0) {
200			int check1;
201			int check2;
202			if (sscanf("123", "%d%n", &check1, &check2) > 0
203			&& check1 == 123
204			&& check2 == 3) {
205			can_convert = 1;
206			} else {
207			can_convert = 0;
208			}
209			}
210
211			if (can_convert) {
212			size_t len_fmt = strlen(format) + 32;
213			char *my_fmt = malloc(len_fmt);
214			ChunkType chunk, ctest;
215			OtherType other, otest;
216			ScanState state;
217			unsigned n;
218			int eaten;
219			void *pointer;
220
221			if (my_fmt != 0) {
222			/*
223			* Split the original format into chunks, adding a "%n" to the end
224			* of each (except of course if it used %n), and use that
225			* information to decide where to start scanning the next chunk.
226			*
227			* FIXME: does %n count bytes or characters? If the latter, this
228			* will require further work for multibyte strings.
229			*/
230			while (*format != '\0') {
231			/* find a chunk */
232			state = sUnknown;
233			chunk = cUnknown;
234			other = oUnknown;
235			pointer = 0;
236			for (n = 0; format[n] != 0 && state != sFinal; ++n) {
237			my_fmt[n] = format[n];
238			switch (state) {
239			case sUnknown:
240			if (format[n] == '%')
241			state = sPercent;
242			break;
243			case sPercent:
244			if (format[n] == '%') {
245			state = sUnknown;
246			} else if (format[n] == L_SQUARE) {
247			state = sLeft;
248			} else {
249			state = sNormal;
250			--n;
251			}
252			break;
253			case sLeft:
254			state = sRange;
255			if (format[n] == '^') {
256			++n;
257			my_fmt[n] = format[n];
258			}
259			break;
260			case sRange:
261			if (format[n] == R_SQUARE) {
262			state = sFinal;
263			chunk = cRange;
264			}
265			break;
266			case sNormal:
267			if (format[n] == '*') {
268			state = sUnknown;
269			} else {
270			if ((ctest = final_ch(format[n], other)) != cUnknown) {
271			state = sFinal;
272			chunk = ctest;
273			} else if ((otest = other_ch(format[n])) != oUnknown) {
274			other = otest;
275			} else if (isalpha(UChar(format[n]))) {
276			state = sFinal;
277			chunk = cError;
278			}
279			}
280			break;
281			case sFinal:
282			break;
283			}
284			}
285			my_fmt[n] = '\0';
286			format += n;
287
288			if (chunk == cUnknown
289			\|\| chunk == cError) {
290			if (assigned == 0)
291			assigned = EOF;
292			break;
293			}
294
295			/* add %n, if the format was not that */
296			if (chunk != cAssigned) {
297			strlcat(my_fmt, "%n", len_fmt);
298			}
299
300			switch (chunk) {
301			case cAssigned:
302			strlcat(my_fmt, "%n", len_fmt);
303			pointer = &eaten;
304			break;
305			case cInt:
306			pointer = va_arg(ap, int *);
307			break;
308			case cShort:
309			pointer = va_arg(ap, short *);
310			break;
311			case cFloat:
312			pointer = va_arg(ap, float *);
313			break;
314			case cDouble:
315			pointer = va_arg(ap, double *);
316			break;
317			case cLong:
318			pointer = va_arg(ap, long *);
319			break;
320			case cPointer:
321			pointer = va_arg(ap, void *);
322			break;
323			case cChar:
324			case cRange:
325			case cString:
326			pointer = va_arg(ap, char *);
327			break;
328			case cError:
329			case cUnknown:
330			break;
331			}
332			/* do the conversion */
333			T(("...converting chunk #%d type %d(%s,%s)",
334			assigned + 1, chunk,
335			_nc_visbuf2(1, str + consumed),
336			_nc_visbuf2(2, my_fmt)));
337			if (sscanf(str + consumed, my_fmt, pointer, &eaten) > 0)
338			consumed += eaten;
339			else
340			break;
341			++assigned;
342			}
343			free(my_fmt);
344			}
345			}
346			returnCode(assigned);
347			#endif
348			}
349			#else
350			extern
351			NCURSES_EXPORT(void)
352			_nc_vsscanf(void); /* quiet's gcc warning */
353			NCURSES_EXPORT(void)
354			_nc_vsscanf(void)
355			{
356			} /* nonempty for strict ANSI compilers */
357			#endif /* !HAVE_VSSCANF */