[openssh.git] / openbsd-compat / bsd-snprintf.c

/**************************************************************
 * Original:
 * Patrick Powell Tue Apr 11 09:48:21 PDT 1995
 * A bombproof version of doprnt (dopr) included.
 * Sigh.  This sort of thing is always nasty do deal with.  Note that
 * the version here does not include floating point...
 *
 * snprintf() is used instead of sprintf() as it does limit checks
 * for string length.  This covers a nasty loophole.
 *
 * The other functions are there to prevent NULL pointers from
 * causing nast effects.
 *
 * More Recently:
 *  Brandon Long <blong@fiction.net> 9/15/96 for mutt 0.43
 *  This was ugly.  It is still ugly.  I opted out of floating point
 *  numbers, but the formatter understands just about everything
 *  from the normal C string format, at least as far as I can tell from
 *  the Solaris 2.5 printf(3S) man page.
 *
 *  Brandon Long <blong@fiction.net> 10/22/97 for mutt 0.87.1
 *    Ok, added some minimal floating point support, which means this
 *    probably requires libm on most operating systems.  Don't yet
 *    support the exponent (e,E) and sigfig (g,G).  Also, fmtint()
 *    was pretty badly broken, it just wasn't being exercised in ways
 *    which showed it, so that's been fixed.  Also, formated the code
 *    to mutt conventions, and removed dead code left over from the
 *    original.  Also, there is now a builtin-test, just compile with:
 *           gcc -DTEST_SNPRINTF -o snprintf snprintf.c -lm
 *    and run snprintf for results.
 * 
 *  Thomas Roessler <roessler@guug.de> 01/27/98 for mutt 0.89i
 *    The PGP code was using unsigned hexadecimal formats. 
 *    Unfortunately, unsigned formats simply didn't work.
 *
 *  Michael Elkins <me@cs.hmc.edu> 03/05/98 for mutt 0.90.8
 *    The original code assumed that both snprintf() and vsnprintf() were
 *    missing.  Some systems only have snprintf() but not vsnprintf(), so
 *    the code is now broken down under HAVE_SNPRINTF and HAVE_VSNPRINTF.
 *
 *  Ben Lindstrom <mouring@eviladmin.org> 09/27/00 for OpenSSH
 *    Welcome to the world of %lld and %qd support.  With other
 *    long long support.  This is needed for sftp-server to work
 *    right.
 *
 *  Ben Lindstrom <mouring@eviladmin.org> 02/12/01 for OpenSSH
 *    Removed all hint of VARARGS stuff and banished it to the void,
 *    and did a bit of KNF style work to make things a bit more
 *    acceptable.  Consider stealing from mutt or enlightenment.
 **************************************************************/

#include "includes.h"

RCSID("$Id$");

#if defined(BROKEN_SNPRINTF)		/* For those with broken snprintf() */
# undef HAVE_SNPRINTF
# undef HAVE_VSNPRINTF
#endif

#if !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF)

static void 
dopr(char *buffer, size_t maxlen, const char *format, va_list args);

static void 
fmtstr(char *buffer, size_t *currlen, size_t maxlen, char *value, int flags, 
       int min, int max);

static void 
fmtint(char *buffer, size_t *currlen, size_t maxlen, long value, int base, 
       int min, int max, int flags);

static void 
fmtfp(char *buffer, size_t *currlen, size_t maxlen, long double fvalue, 
      int min, int max, int flags);

static void
dopr_outch(char *buffer, size_t *currlen, size_t maxlen, char c);

/*
 * dopr(): poor man's version of doprintf
 */

/* format read states */
#define DP_S_DEFAULT 0
#define DP_S_FLAGS   1
#define DP_S_MIN     2
#define DP_S_DOT     3
#define DP_S_MAX     4
#define DP_S_MOD     5
#define DP_S_CONV    6
#define DP_S_DONE    7

/* format flags - Bits */
#define DP_F_MINUS 	(1 << 0)
#define DP_F_PLUS  	(1 << 1)
#define DP_F_SPACE 	(1 << 2)
#define DP_F_NUM   	(1 << 3)
#define DP_F_ZERO  	(1 << 4)
#define DP_F_UP    	(1 << 5)
#define DP_F_UNSIGNED 	(1 << 6)

/* Conversion Flags */
#define DP_C_SHORT     1
#define DP_C_LONG      2
#define DP_C_LDOUBLE   3
#define DP_C_LONG_LONG 4

#define char_to_int(p) (p - '0')
#define abs_val(p) (p < 0 ? -p : p)


static void 
dopr(char *buffer, size_t maxlen, const char *format, va_list args)
{
	char *strvalue;
	char ch;
	long value;
	long double fvalue;
	int min = 0;
	int max = -1;
	int state = DP_S_DEFAULT;
	int flags = 0;
	int cflags = 0;
	size_t currlen = 0;
  
	ch = *format++;

	while (state != DP_S_DONE) {
		if ((ch == '\0') || (currlen >= maxlen)) 
			state = DP_S_DONE;

		switch(state) {
			case DP_S_DEFAULT:
				if (ch == '%') 
					state = DP_S_FLAGS;
				else 
					dopr_outch(buffer, &currlen, maxlen, ch);
				ch = *format++;
				break;
			case DP_S_FLAGS:
				switch (ch) {
					case '-':
						flags |= DP_F_MINUS;
						ch = *format++;
						break;
					case '+':
						flags |= DP_F_PLUS;
						ch = *format++;
						break;
					case ' ':
						flags |= DP_F_SPACE;
						ch = *format++;
						break;
					case '#':
						flags |= DP_F_NUM;
						ch = *format++;
						break;
					case '0':
						flags |= DP_F_ZERO;
						ch = *format++;
						break;
					default:
						state = DP_S_MIN;
						break;
				}
				break;
			case DP_S_MIN:
				if (isdigit((unsigned char)ch)) {
					min = 10*min + char_to_int (ch);
					ch = *format++;
				} else if (ch == '*') {
					min = va_arg (args, int);
					ch = *format++;
					state = DP_S_DOT;
				} else 
					state = DP_S_DOT;
				break;
			case DP_S_DOT:
				if (ch == '.') {
					state = DP_S_MAX;
					ch = *format++;
				} else 
					state = DP_S_MOD;
				break;
			case DP_S_MAX:
				if (isdigit((unsigned char)ch)) {
					if (max < 0)
						max = 0;
					max = 10*max + char_to_int(ch);
					ch = *format++;
				} else if (ch == '*') {
					max = va_arg (args, int);
					ch = *format++;
					state = DP_S_MOD;
				} else 
					state = DP_S_MOD;
				break;
			case DP_S_MOD:
				switch (ch) {
					case 'h':
						cflags = DP_C_SHORT;
						ch = *format++;
						break;
					case 'l':
						cflags = DP_C_LONG;
						ch = *format++;
						if (ch == 'l') {
							cflags = DP_C_LONG_LONG;
							ch = *format++;
						}
						break;
					case 'q':
						cflags = DP_C_LONG_LONG;
						ch = *format++;
						break;
					case 'L':
						cflags = DP_C_LDOUBLE;
						ch = *format++;
						break;
					default:
						break;
				}
				state = DP_S_CONV;
				break;
			case DP_S_CONV:
				switch (ch) {
					case 'd':
					case 'i':
						if (cflags == DP_C_SHORT) 
							value = va_arg(args, int);
						else if (cflags == DP_C_LONG)
							value = va_arg(args, long int);
						else if (cflags == DP_C_LONG_LONG)
							value = va_arg (args, long long);
						else
							value = va_arg (args, int);
						fmtint(buffer, &currlen, maxlen, value, 10, min, max, flags);
						break;
					case 'o':
						flags |= DP_F_UNSIGNED;
						if (cflags == DP_C_SHORT)
							value = va_arg(args, unsigned int);
						else if (cflags == DP_C_LONG)
							value = va_arg(args, unsigned long int);
						else if (cflags == DP_C_LONG_LONG)
							value = va_arg(args, unsigned long long);
						else
							value = va_arg(args, unsigned int);
						fmtint(buffer, &currlen, maxlen, value, 8, min, max, flags);
						break;
					case 'u':
						flags |= DP_F_UNSIGNED;
						if (cflags == DP_C_SHORT)
							value = va_arg(args, unsigned int);
						else if (cflags == DP_C_LONG)
							value = va_arg(args, unsigned long int);
						else if (cflags == DP_C_LONG_LONG)
							value = va_arg(args, unsigned long long);
						else
							value = va_arg(args, unsigned int);
						fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags);
						break;
					case 'X':
						flags |= DP_F_UP;
					case 'x':
						flags |= DP_F_UNSIGNED;
						if (cflags == DP_C_SHORT)
							value = va_arg(args, unsigned int);
						else if (cflags == DP_C_LONG)
							value = va_arg(args, unsigned long int);
						else if (cflags == DP_C_LONG_LONG)
							value = va_arg(args, unsigned long long);
						else
							value = va_arg(args, unsigned int);
						fmtint(buffer, &currlen, maxlen, value, 16, min, max, flags);
						break;
					case 'f':
						if (cflags == DP_C_LDOUBLE)
							fvalue = va_arg(args, long double);
						else
							fvalue = va_arg(args, double);
						/* um, floating point? */
						fmtfp(buffer, &currlen, maxlen, fvalue, min, max, flags);
						break;
					case 'E':
						flags |= DP_F_UP;
					case 'e':
						if (cflags == DP_C_LDOUBLE)
							fvalue = va_arg(args, long double);
						else
							fvalue = va_arg(args, double);
						break;
					case 'G':
						flags |= DP_F_UP;
					case 'g':
						if (cflags == DP_C_LDOUBLE)
							fvalue = va_arg(args, long double);
						else
							fvalue = va_arg(args, double);
						break;
					case 'c':
						dopr_outch(buffer, &currlen, maxlen, va_arg(args, int));
						break;
					case 's':
						strvalue = va_arg(args, char *);
						if (max < 0) 
							max = maxlen; /* ie, no max */
						fmtstr(buffer, &currlen, maxlen, strvalue, flags, min, max);
						break;
					case 'p':
						strvalue = va_arg(args, void *);
						fmtint(buffer, &currlen, maxlen, (long) strvalue, 16, min, max, flags);
						break;
					case 'n':
						if (cflags == DP_C_SHORT) {
							short int *num;
							num = va_arg(args, short int *);
							*num = currlen;
						} else if (cflags == DP_C_LONG) {
							long int *num;
							num = va_arg(args, long int *);
							*num = currlen;
						} else if (cflags == DP_C_LONG_LONG) {
							long long *num;
							num = va_arg(args, long long *);
							*num = currlen;
						} else {
							int *num;
							num = va_arg(args, int *);
							*num = currlen;
						}
						break;
					case '%':
						dopr_outch(buffer, &currlen, maxlen, ch);
						break;
					case 'w': /* not supported yet, treat as next char */
						ch = *format++;
						break;
					default: /* Unknown, skip */
					break;
				}
				ch = *format++;
				state = DP_S_DEFAULT;
				flags = cflags = min = 0;
				max = -1;
				break;
			case DP_S_DONE:
				break;
			default: /* hmm? */
				break; /* some picky compilers need this */
		}
	}
	if (currlen < maxlen - 1) 
		buffer[currlen] = '\0';
	else 
		buffer[maxlen - 1] = '\0';
}

static void
fmtstr(char *buffer, size_t *currlen, size_t maxlen,
       char *value, int flags, int min, int max)
{
	int padlen, strln;     /* amount to pad */
	int cnt = 0;
  
	if (value == 0) 
		value = "<NULL>";

	for (strln = 0; value[strln]; ++strln); /* strlen */
	padlen = min - strln;
	if (padlen < 0) 
		padlen = 0;
	if (flags & DP_F_MINUS) 
		padlen = -padlen; /* Left Justify */

	while ((padlen > 0) && (cnt < max)) {
		dopr_outch(buffer, currlen, maxlen, ' ');
		--padlen;
		++cnt;
	}
	while (*value && (cnt < max)) {
		dopr_outch(buffer, currlen, maxlen, *value++);
		++cnt;
	}
	while ((padlen < 0) && (cnt < max)) {
		dopr_outch(buffer, currlen, maxlen, ' ');
		++padlen;
		++cnt;
	}
}

/* Have to handle DP_F_NUM (ie 0x and 0 alternates) */

static void 
fmtint(char *buffer, size_t *currlen, size_t maxlen,
       long value, int base, int min, int max, int flags)
{
	unsigned long uvalue;
	char convert[20];
	int signvalue = 0;
	int place = 0;
	int spadlen = 0; /* amount to space pad */
	int zpadlen = 0; /* amount to zero pad */
	int caps = 0;
  
	if (max < 0)
		max = 0;

	uvalue = value;

	if (!(flags & DP_F_UNSIGNED)) {
		if (value < 0) {
			signvalue = '-';
			uvalue = -value;
		} else if (flags & DP_F_PLUS)  /* Do a sign (+/i) */
			signvalue = '+';
		else if (flags & DP_F_SPACE)
			signvalue = ' ';
	}
  
	if (flags & DP_F_UP) 
		caps = 1; /* Should characters be upper case? */

	do {
		convert[place++] =
			(caps? "0123456789ABCDEF":"0123456789abcdef")
			[uvalue % (unsigned)base];
		uvalue = (uvalue / (unsigned)base );
	} while (uvalue && (place < 20));
	if (place == 20) 
		place--;
	convert[place] = 0;

	zpadlen = max - place;
	spadlen = min - MAX (max, place) - (signvalue ? 1 : 0);
	if (zpadlen < 0)
		zpadlen = 0;
	if (spadlen < 0)
		spadlen = 0;
	if (flags & DP_F_ZERO) {
		zpadlen = MAX(zpadlen, spadlen);
		spadlen = 0;
	}
	if (flags & DP_F_MINUS) 
		spadlen = -spadlen; /* Left Justifty */


	/* Spaces */
	while (spadlen > 0) {
		dopr_outch(buffer, currlen, maxlen, ' ');
		--spadlen;
	}

	/* Sign */
	if (signvalue) 
		dopr_outch(buffer, currlen, maxlen, signvalue);

	/* Zeros */
	if (zpadlen > 0) {
		while (zpadlen > 0) {
			dopr_outch(buffer, currlen, maxlen, '0');
			--zpadlen;
		}
	}

	/* Digits */
	while (place > 0) 
		dopr_outch(buffer, currlen, maxlen, convert[--place]);
  
	/* Left Justified spaces */
	while (spadlen < 0) {
		dopr_outch (buffer, currlen, maxlen, ' ');
		++spadlen;
	}
}

static long double 
pow10(int exp)
{
	long double result = 1;

	while (exp) {
		result *= 10;
		exp--;
	}
  
	return result;
}

static long 
round(long double value)
{
	long intpart = value;

	value -= intpart;
	if (value >= 0.5)
		intpart++;

	return intpart;
}

static void 
fmtfp(char *buffer, size_t *currlen, size_t maxlen, long double fvalue, 
      int min, int max, int flags)
{
	char iconvert[20];
	char fconvert[20];
	int signvalue = 0;
	int iplace = 0;
	int fplace = 0;
	int padlen = 0; /* amount to pad */
	int zpadlen = 0; 
	int caps = 0;
	long intpart;
	long fracpart;
	long double ufvalue;
  
	/* 
	 * AIX manpage says the default is 0, but Solaris says the default
	 * is 6, and sprintf on AIX defaults to 6
	 */
	if (max < 0)
		max = 6;

	ufvalue = abs_val(fvalue);

	if (fvalue < 0)
		signvalue = '-';
	else if (flags & DP_F_PLUS)  /* Do a sign (+/i) */
		signvalue = '+';
	else if (flags & DP_F_SPACE)
		signvalue = ' ';

	intpart = ufvalue;

	/* 
	 * Sorry, we only support 9 digits past the decimal because of our 
	 * conversion method
	 */
	if (max > 9)
		max = 9;

	/* We "cheat" by converting the fractional part to integer by
	 * multiplying by a factor of 10
	 */
	fracpart = round((pow10 (max)) * (ufvalue - intpart));

	if (fracpart >= pow10 (max)) {
		intpart++;
		fracpart -= pow10 (max);
	}

	/* Convert integer part */
	do {
		iconvert[iplace++] =
		  (caps? "0123456789ABCDEF":"0123456789abcdef")[intpart % 10];
		intpart = (intpart / 10);
	} while(intpart && (iplace < 20));
	if (iplace == 20) 
		iplace--;
	iconvert[iplace] = 0;

	/* Convert fractional part */
	do {
		fconvert[fplace++] =
		  (caps? "0123456789ABCDEF":"0123456789abcdef")[fracpart % 10];
		fracpart = (fracpart / 10);
	} while(fracpart && (fplace < 20));
	if (fplace == 20) 
		fplace--;
	fconvert[fplace] = 0;

	/* -1 for decimal point, another -1 if we are printing a sign */
	padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0); 
	zpadlen = max - fplace;
	if (zpadlen < 0)
		zpadlen = 0;
	if (padlen < 0) 
		padlen = 0;
	if (flags & DP_F_MINUS) 
		padlen = -padlen; /* Left Justifty */

	if ((flags & DP_F_ZERO) && (padlen > 0)) {
		if (signvalue) {
			dopr_outch(buffer, currlen, maxlen, signvalue);
			--padlen;
			signvalue = 0;
		}
		while (padlen > 0) {
			dopr_outch(buffer, currlen, maxlen, '0');
			--padlen;
		}
	}
	while (padlen > 0) {
		dopr_outch(buffer, currlen, maxlen, ' ');
		--padlen;
	}
	if (signvalue) 
		dopr_outch(buffer, currlen, maxlen, signvalue);

	while (iplace > 0) 
		dopr_outch(buffer, currlen, maxlen, iconvert[--iplace]);

	/*
	 * Decimal point.  This should probably use locale to find the correct
	 * char to print out.
	 */
	dopr_outch(buffer, currlen, maxlen, '.');

	while (fplace > 0) 
		dopr_outch(buffer, currlen, maxlen, fconvert[--fplace]);

	while (zpadlen > 0) {
		dopr_outch(buffer, currlen, maxlen, '0');
		--zpadlen;
	}

	while (padlen < 0) {
		dopr_outch(buffer, currlen, maxlen, ' ');
		++padlen;
	}
}

static void 
dopr_outch(char *buffer, size_t *currlen, size_t maxlen, char c)
{
	if (*currlen < maxlen)
		buffer[(*currlen)++] = c;
}
#endif /* !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) */

#ifndef HAVE_VSNPRINTF
int 
vsnprintf(char *str, size_t count, const char *fmt, va_list args)
{
	str[0] = 0;
	dopr(str, count, fmt, args);

	return(strlen(str));
}
#endif /* !HAVE_VSNPRINTF */

#ifndef HAVE_SNPRINTF
int 
snprintf(char *str,size_t count,const char *fmt,...)
{
	va_list ap;

	va_start(ap, fmt);
	(void) vsnprintf(str, count, fmt, ap);
	va_end(ap);

	return(strlen(str));
}

#ifdef TEST_SNPRINTF
int 
main(void)
{
#define LONG_STRING 1024
	char buf1[LONG_STRING];
	char buf2[LONG_STRING];
	char *fp_fmt[] = {
		"%-1.5f",
		"%1.5f",
		"%123.9f",
		"%10.5f",
		"% 10.5f",
		"%+22.9f",
		"%+4.9f",
		"%01.3f",
		"%4f",
		"%3.1f",
		"%3.2f",
		NULL
	};
	double fp_nums[] = { 
		-1.5, 
		134.21, 
		91340.2, 
		341.1234, 
		0203.9, 
		0.96, 
		0.996, 
		0.9996, 
		1.996, 
		4.136, 
		0
	};
	char *int_fmt[] = {
		"%-1.5d",
		"%1.5d",
		"%123.9d",
		"%5.5d",
		"%10.5d",
		"% 10.5d",
		"%+22.33d",
		"%01.3d",
		"%4d",
		"%lld",
		"%qd",
		NULL
	};
	long long int_nums[] = { -1, 134, 91340, 341, 0203, 0, 9999999 };
	int x, y;
	int fail = 0;
	int num = 0;

	printf("Testing snprintf format codes against system sprintf...\n");

	for (x = 0; fp_fmt[x] != NULL ; x++) {
		for (y = 0; fp_nums[y] != 0 ; y++) {
			snprintf(buf1, sizeof (buf1), fp_fmt[x], fp_nums[y]);
			sprintf (buf2, fp_fmt[x], fp_nums[y]);
			if (strcmp (buf1, buf2)) {
				printf("snprintf doesn't match Format: %s\n\t"
                                       "snprintf = %s\n\tsprintf  = %s\n", 
					fp_fmt[x], buf1, buf2);
				fail++;
			}
			num++;
		}
	}
	for (x = 0; int_fmt[x] != NULL ; x++) {
		for (y = 0; int_nums[y] != 0 ; y++) {
			snprintf(buf1, sizeof (buf1), int_fmt[x], int_nums[y]);
			sprintf(buf2, int_fmt[x], int_nums[y]);
			if (strcmp (buf1, buf2)) {
				printf("snprintf doesn't match Format: %s\n\t"
				       "snprintf = %s\n\tsprintf  = %s\n", 
					int_fmt[x], buf1, buf2);
				fail++;
			}
			num++;
		}
	}
	printf("%d tests failed out of %d.\n", fail, num);
	return(0);
}
#endif /* SNPRINTF_TEST */

#endif /* !HAVE_SNPRINTF */
Commit	Line	Data
2d9a148e	1	/**************************************************************
	2	* Original:
	3	* Patrick Powell Tue Apr 11 09:48:21 PDT 1995
	4	* A bombproof version of doprnt (dopr) included.
	5	* Sigh. This sort of thing is always nasty do deal with. Note that
	6	* the version here does not include floating point...
dad3b556	7	*
2d9a148e	8	* snprintf() is used instead of sprintf() as it does limit checks
2d9a148e	9	* for string length. This covers a nasty loophole.
dad3b556	10	*
2d9a148e	11	* The other functions are there to prevent NULL pointers from
2d9a148e	12	* causing nast effects.
dad3b556	13	*
2d9a148e	14	* More Recently:
	15	* Brandon Long <blong@fiction.net> 9/15/96 for mutt 0.43
	16	* This was ugly. It is still ugly. I opted out of floating point
	17	* numbers, but the formatter understands just about everything
	18	* from the normal C string format, at least as far as I can tell from
	19	* the Solaris 2.5 printf(3S) man page.
	20	*
	21	* Brandon Long <blong@fiction.net> 10/22/97 for mutt 0.87.1
	22	* Ok, added some minimal floating point support, which means this
	23	* probably requires libm on most operating systems. Don't yet
	24	* support the exponent (e,E) and sigfig (g,G). Also, fmtint()
	25	* was pretty badly broken, it just wasn't being exercised in ways
	26	* which showed it, so that's been fixed. Also, formated the code
	27	* to mutt conventions, and removed dead code left over from the
	28	* original. Also, there is now a builtin-test, just compile with:
	29	* gcc -DTEST_SNPRINTF -o snprintf snprintf.c -lm
	30	* and run snprintf for results.
	31	*
	32	* Thomas Roessler <roessler@guug.de> 01/27/98 for mutt 0.89i
	33	* The PGP code was using unsigned hexadecimal formats.
	34	* Unfortunately, unsigned formats simply didn't work.
	35	*
	36	* Michael Elkins <me@cs.hmc.edu> 03/05/98 for mutt 0.90.8
	37	* The original code assumed that both snprintf() and vsnprintf() were
	38	* missing. Some systems only have snprintf() but not vsnprintf(), so
	39	* the code is now broken down under HAVE_SNPRINTF and HAVE_VSNPRINTF.
	40	*
f1312c76	41	* Ben Lindstrom <mouring@eviladmin.org> 09/27/00 for OpenSSH
c73b8e3a	42	* Welcome to the world of %lld and %qd support. With other
	43	* long long support. This is needed for sftp-server to work
	44	* right.
f1312c76	45	*
	46	* Ben Lindstrom <mouring@eviladmin.org> 02/12/01 for OpenSSH
	47	* Removed all hint of VARARGS stuff and banished it to the void,
	48	* and did a bit of KNF style work to make things a bit more
	49	* acceptable. Consider stealing from mutt or enlightenment.
2d9a148e	50	**************************************************************/
dad3b556	51
0b202697	52	#include "includes.h"
	53
	54	RCSID("$Id$");
dad3b556	55
4925395f	56	#if defined(BROKEN_SNPRINTF) /* For those with broken snprintf() */
	57	# undef HAVE_SNPRINTF
	58	# undef HAVE_VSNPRINTF
	59	#endif
	60
2d9a148e	61	#if !defined(HAVE_SNPRINTF) \|\| !defined(HAVE_VSNPRINTF)
dad3b556	62
f1312c76	63	static void
	64	dopr(char buffer, size_t maxlen, const char format, va_list args);
	65
	66	static void
	67	fmtstr(char buffer, size_t currlen, size_t maxlen, char *value, int flags,
	68	int min, int max);
	69
	70	static void
	71	fmtint(char buffer, size_t currlen, size_t maxlen, long value, int base,
	72	int min, int max, int flags);
	73
	74	static void
	75	fmtfp(char buffer, size_t currlen, size_t maxlen, long double fvalue,
	76	int min, int max, int flags);
2d9a148e	77
958e5ae4	78	static void
	79	dopr_outch(char buffer, size_t currlen, size_t maxlen, char c);
	80
2d9a148e	81	/*
	82	* dopr(): poor man's version of doprintf
	83	*/
	84
	85	/* format read states */
	86	#define DP_S_DEFAULT 0
	87	#define DP_S_FLAGS 1
	88	#define DP_S_MIN 2
	89	#define DP_S_DOT 3
	90	#define DP_S_MAX 4
	91	#define DP_S_MOD 5
	92	#define DP_S_CONV 6
	93	#define DP_S_DONE 7
	94
	95	/* format flags - Bits */
	96	#define DP_F_MINUS (1 << 0)
	97	#define DP_F_PLUS (1 << 1)
	98	#define DP_F_SPACE (1 << 2)
	99	#define DP_F_NUM (1 << 3)
	100	#define DP_F_ZERO (1 << 4)
	101	#define DP_F_UP (1 << 5)
	102	#define DP_F_UNSIGNED (1 << 6)
	103
	104	/* Conversion Flags */
c73b8e3a	105	#define DP_C_SHORT 1
	106	#define DP_C_LONG 2
	107	#define DP_C_LDOUBLE 3
	108	#define DP_C_LONG_LONG 4
2d9a148e	109
2d9a148e	110	#define char_to_int(p) (p - '0')
f1312c76	111	#define abs_val(p) (p < 0 ? -p : p)
2d9a148e	112
f1312c76	113
	114	static void
	115	dopr(char buffer, size_t maxlen, const char format, va_list args)
2d9a148e	116	{
f1312c76	117	char *strvalue;
	118	char ch;
	119	long value;
	120	long double fvalue;
	121	int min = 0;
	122	int max = -1;
	123	int state = DP_S_DEFAULT;
	124	int flags = 0;
	125	int cflags = 0;
	126	size_t currlen = 0;
2d9a148e	127
2d9a148e	128	ch = *format++;
f1312c76	129
	130	while (state != DP_S_DONE) {
	131	if ((ch == '\0') \|\| (currlen >= maxlen))
	132	state = DP_S_DONE;
	133
	134	switch(state) {
	135	case DP_S_DEFAULT:
	136	if (ch == '%')
	137	state = DP_S_FLAGS;
	138	else
	139	dopr_outch(buffer, &currlen, maxlen, ch);
	140	ch = *format++;
	141	break;
	142	case DP_S_FLAGS:
	143	switch (ch) {
	144	case '-':
	145	flags \|= DP_F_MINUS;
	146	ch = *format++;
	147	break;
	148	case '+':
	149	flags \|= DP_F_PLUS;
	150	ch = *format++;
	151	break;
	152	case ' ':
	153	flags \|= DP_F_SPACE;
	154	ch = *format++;
	155	break;
	156	case '#':
	157	flags \|= DP_F_NUM;
	158	ch = *format++;
	159	break;
	160	case '0':
	161	flags \|= DP_F_ZERO;
	162	ch = *format++;
	163	break;
	164	default:
	165	state = DP_S_MIN;
	166	break;
	167	}
	168	break;
	169	case DP_S_MIN:
	170	if (isdigit((unsigned char)ch)) {
	171	min = 10*min + char_to_int (ch);
	172	ch = *format++;
	173	} else if (ch == '*') {
	174	min = va_arg (args, int);
	175	ch = *format++;
	176	state = DP_S_DOT;
	177	} else
	178	state = DP_S_DOT;
	179	break;
	180	case DP_S_DOT:
	181	if (ch == '.') {
	182	state = DP_S_MAX;
	183	ch = *format++;
	184	} else
	185	state = DP_S_MOD;
	186	break;
	187	case DP_S_MAX:
	188	if (isdigit((unsigned char)ch)) {
	189	if (max < 0)
	190	max = 0;
	191	max = 10*max + char_to_int(ch);
	192	ch = *format++;
193	} else if (ch == '*') {
194	max = va_arg (args, int);
195	ch = *format++;
196	state = DP_S_MOD;
197	} else
198	state = DP_S_MOD;
199	break;
200	case DP_S_MOD:
201	switch (ch) {
202	case 'h':
203	cflags = DP_C_SHORT;
204	ch = *format++;
205	break;
206	case 'l':
207	cflags = DP_C_LONG;
208	ch = *format++;
209	if (ch == 'l') {
210	cflags = DP_C_LONG_LONG;
211	ch = *format++;
212	}
213	break;
214	case 'q':
215	cflags = DP_C_LONG_LONG;
216	ch = *format++;
217	break;
218	case 'L':
219	cflags = DP_C_LDOUBLE;
220	ch = *format++;
221	break;
222	default:
223	break;
224	}
225	state = DP_S_CONV;
226	break;
227	case DP_S_CONV:
228	switch (ch) {
229	case 'd':
230	case 'i':
231	if (cflags == DP_C_SHORT)
232	value = va_arg(args, int);
233	else if (cflags == DP_C_LONG)
234	value = va_arg(args, long int);
235	else if (cflags == DP_C_LONG_LONG)
236	value = va_arg (args, long long);
237	else
238	value = va_arg (args, int);
239	fmtint(buffer, &currlen, maxlen, value, 10, min, max, flags);
240	break;
241	case 'o':
242	flags \|= DP_F_UNSIGNED;
243	if (cflags == DP_C_SHORT)
244	value = va_arg(args, unsigned int);
245	else if (cflags == DP_C_LONG)
246	value = va_arg(args, unsigned long int);
247	else if (cflags == DP_C_LONG_LONG)
248	value = va_arg(args, unsigned long long);
249	else
250	value = va_arg(args, unsigned int);
251	fmtint(buffer, &currlen, maxlen, value, 8, min, max, flags);
252	break;
253	case 'u':
254	flags \|= DP_F_UNSIGNED;
255	if (cflags == DP_C_SHORT)
256	value = va_arg(args, unsigned int);
257	else if (cflags == DP_C_LONG)
258	value = va_arg(args, unsigned long int);
259	else if (cflags == DP_C_LONG_LONG)
260	value = va_arg(args, unsigned long long);
261	else
262	value = va_arg(args, unsigned int);
263	fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags);
264	break;
265	case 'X':
266	flags \|= DP_F_UP;
267	case 'x':
268	flags \|= DP_F_UNSIGNED;
269	if (cflags == DP_C_SHORT)
270	value = va_arg(args, unsigned int);
271	else if (cflags == DP_C_LONG)
272	value = va_arg(args, unsigned long int);
273	else if (cflags == DP_C_LONG_LONG)
274	value = va_arg(args, unsigned long long);
275	else
276	value = va_arg(args, unsigned int);
277	fmtint(buffer, &currlen, maxlen, value, 16, min, max, flags);
278	break;
279	case 'f':
280	if (cflags == DP_C_LDOUBLE)
281	fvalue = va_arg(args, long double);
282	else
283	fvalue = va_arg(args, double);
284	/* um, floating point? */
285	fmtfp(buffer, &currlen, maxlen, fvalue, min, max, flags);
286	break;
287	case 'E':
288	flags \|= DP_F_UP;
289	case 'e':
290	if (cflags == DP_C_LDOUBLE)
291	fvalue = va_arg(args, long double);
292	else
293	fvalue = va_arg(args, double);
294	break;
295	case 'G':
296	flags \|= DP_F_UP;
297	case 'g':
298	if (cflags == DP_C_LDOUBLE)
299	fvalue = va_arg(args, long double);
300	else
301	fvalue = va_arg(args, double);
302	break;
303	case 'c':
304	dopr_outch(buffer, &currlen, maxlen, va_arg(args, int));
305	break;
306	case 's':
307	strvalue = va_arg(args, char *);
308	if (max < 0)
309	max = maxlen; /* ie, no max */
310	fmtstr(buffer, &currlen, maxlen, strvalue, flags, min, max);
311	break;
312	case 'p':
313	strvalue = va_arg(args, void *);
314	fmtint(buffer, &currlen, maxlen, (long) strvalue, 16, min, max, flags);
315	break;
316	case 'n':
317	if (cflags == DP_C_SHORT) {
318	short int *num;
319	num = va_arg(args, short int *);
320	*num = currlen;
321	} else if (cflags == DP_C_LONG) {
322	long int *num;
323	num = va_arg(args, long int *);
324	*num = currlen;
325	} else if (cflags == DP_C_LONG_LONG) {
326	long long *num;
327	num = va_arg(args, long long *);
328	*num = currlen;
329	} else {
330	int *num;
331	num = va_arg(args, int *);
332	*num = currlen;
333	}
334	break;
335	case '%':
336	dopr_outch(buffer, &currlen, maxlen, ch);
337	break;
338	case 'w': /* not supported yet, treat as next char */
339	ch = *format++;
340	break;
341	default: /* Unknown, skip */
342	break;
343	}
344	ch = *format++;
345	state = DP_S_DEFAULT;
346	flags = cflags = min = 0;
347	max = -1;
348	break;
349	case DP_S_DONE:
350	break;
351	default: /* hmm? */
352	break; /* some picky compilers need this */
353	}
354	}
355	if (currlen < maxlen - 1)
356	buffer[currlen] = '\0';
2d9a148e	357	else
f1312c76	358	buffer[maxlen - 1] = '\0';
2d9a148e	359	}
2d9a148e	360
f1312c76	361	static void
	362	fmtstr(char buffer, size_t currlen, size_t maxlen,
	363	char *value, int flags, int min, int max)
2d9a148e	364	{
f1312c76	365	int padlen, strln; /* amount to pad */
f1312c76	366	int cnt = 0;
2d9a148e	367
f1312c76	368	if (value == 0)
	369	value = "<NULL>";
	370
	371	for (strln = 0; value[strln]; ++strln); /* strlen */
	372	padlen = min - strln;
	373	if (padlen < 0)
	374	padlen = 0;
	375	if (flags & DP_F_MINUS)
	376	padlen = -padlen; /* Left Justify */
	377
	378	while ((padlen > 0) && (cnt < max)) {
	379	dopr_outch(buffer, currlen, maxlen, ' ');
	380	--padlen;
	381	++cnt;
	382	}
	383	while (*value && (cnt < max)) {
	384	dopr_outch(buffer, currlen, maxlen, *value++);
	385	++cnt;
	386	}
	387	while ((padlen < 0) && (cnt < max)) {
	388	dopr_outch(buffer, currlen, maxlen, ' ');
	389	++padlen;
	390	++cnt;
	391	}
2d9a148e	392	}
	393
	394	/* Have to handle DP_F_NUM (ie 0x and 0 alternates) */
	395
f1312c76	396	static void
	397	fmtint(char buffer, size_t currlen, size_t maxlen,
	398	long value, int base, int min, int max, int flags)
2d9a148e	399	{
f1312c76	400	unsigned long uvalue;
	401	char convert[20];
	402	int signvalue = 0;
	403	int place = 0;
	404	int spadlen = 0; /* amount to space pad */
	405	int zpadlen = 0; /* amount to zero pad */
	406	int caps = 0;
2d9a148e	407
f1312c76	408	if (max < 0)
	409	max = 0;
	410
	411	uvalue = value;
	412
	413	if (!(flags & DP_F_UNSIGNED)) {
	414	if (value < 0) {
	415	signvalue = '-';
	416	uvalue = -value;
	417	} else if (flags & DP_F_PLUS) /* Do a sign (+/i) */
	418	signvalue = '+';
	419	else if (flags & DP_F_SPACE)
	420	signvalue = ' ';
	421	}
2d9a148e	422
f1312c76	423	if (flags & DP_F_UP)
	424	caps = 1; /* Should characters be upper case? */
	425
	426	do {
	427	convert[place++] =
	428	(caps? "0123456789ABCDEF":"0123456789abcdef")
	429	[uvalue % (unsigned)base];
	430	uvalue = (uvalue / (unsigned)base );
	431	} while (uvalue && (place < 20));
	432	if (place == 20)
	433	place--;
	434	convert[place] = 0;
	435
	436	zpadlen = max - place;
	437	spadlen = min - MAX (max, place) - (signvalue ? 1 : 0);
	438	if (zpadlen < 0)
	439	zpadlen = 0;
	440	if (spadlen < 0)
	441	spadlen = 0;
	442	if (flags & DP_F_ZERO) {
	443	zpadlen = MAX(zpadlen, spadlen);
	444	spadlen = 0;
	445	}
	446	if (flags & DP_F_MINUS)
	447	spadlen = -spadlen; /* Left Justifty */
	448
	449
	450	/* Spaces */
	451	while (spadlen > 0) {
	452	dopr_outch(buffer, currlen, maxlen, ' ');
	453	--spadlen;
	454	}
	455
	456	/* Sign */
	457	if (signvalue)
	458	dopr_outch(buffer, currlen, maxlen, signvalue);
	459
	460	/* Zeros */
	461	if (zpadlen > 0) {
	462	while (zpadlen > 0) {
	463	dopr_outch(buffer, currlen, maxlen, '0');
	464	--zpadlen;
	465	}
	466	}
	467
	468	/* Digits */
	469	while (place > 0)
	470	dopr_outch(buffer, currlen, maxlen, convert[--place]);
2d9a148e	471
f1312c76	472	/* Left Justified spaces */
	473	while (spadlen < 0) {
	474	dopr_outch (buffer, currlen, maxlen, ' ');
	475	++spadlen;
	476	}
b6019d68	477	}
b6019d68	478
f1312c76	479	static long double
f1312c76	480	pow10(int exp)
dad3b556	481	{
f1312c76	482	long double result = 1;
2d9a148e	483
f1312c76	484	while (exp) {
	485	result *= 10;
	486	exp--;
	487	}
2d9a148e	488
f1312c76	489	return result;
dad3b556	490	}
dad3b556	491
f1312c76	492	static long
f1312c76	493	round(long double value)
dad3b556	494	{
f1312c76	495	long intpart = value;
2d9a148e	496
f1312c76	497	value -= intpart;
	498	if (value >= 0.5)
	499	intpart++;
2d9a148e	500
f1312c76	501	return intpart;
dad3b556	502	}
dad3b556	503
f1312c76	504	static void
	505	fmtfp(char buffer, size_t currlen, size_t maxlen, long double fvalue,
	506	int min, int max, int flags)
dad3b556	507	{
f1312c76	508	char iconvert[20];
	509	char fconvert[20];
	510	int signvalue = 0;
	511	int iplace = 0;
	512	int fplace = 0;
	513	int padlen = 0; /* amount to pad */
	514	int zpadlen = 0;
	515	int caps = 0;
	516	long intpart;
	517	long fracpart;
	518	long double ufvalue;
2d9a148e	519
f1312c76	520	/*
	521	* AIX manpage says the default is 0, but Solaris says the default
	522	* is 6, and sprintf on AIX defaults to 6
	523	*/
	524	if (max < 0)
	525	max = 6;
	526
	527	ufvalue = abs_val(fvalue);
	528
	529	if (fvalue < 0)
	530	signvalue = '-';
	531	else if (flags & DP_F_PLUS) /* Do a sign (+/i) */
	532	signvalue = '+';
	533	else if (flags & DP_F_SPACE)
	534	signvalue = ' ';
	535
	536	intpart = ufvalue;
	537
	538	/*
	539	* Sorry, we only support 9 digits past the decimal because of our
	540	* conversion method
	541	*/
	542	if (max > 9)
	543	max = 9;
	544
	545	/* We "cheat" by converting the fractional part to integer by
	546	* multiplying by a factor of 10
	547	*/
	548	fracpart = round((pow10 (max)) * (ufvalue - intpart));
	549
	550	if (fracpart >= pow10 (max)) {
	551	intpart++;
	552	fracpart -= pow10 (max);
	553	}
	554
	555	/* Convert integer part */
	556	do {
	557	iconvert[iplace++] =
	558	(caps? "0123456789ABCDEF":"0123456789abcdef")[intpart % 10];
	559	intpart = (intpart / 10);
	560	} while(intpart && (iplace < 20));
	561	if (iplace == 20)
	562	iplace--;
	563	iconvert[iplace] = 0;
	564
	565	/* Convert fractional part */
	566	do {
	567	fconvert[fplace++] =
	568	(caps? "0123456789ABCDEF":"0123456789abcdef")[fracpart % 10];
	569	fracpart = (fracpart / 10);
	570	} while(fracpart && (fplace < 20));
	571	if (fplace == 20)
	572	fplace--;
	573	fconvert[fplace] = 0;
	574
	575	/* -1 for decimal point, another -1 if we are printing a sign */
	576	padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0);
	577	zpadlen = max - fplace;
	578	if (zpadlen < 0)
	579	zpadlen = 0;
	580	if (padlen < 0)
	581	padlen = 0;
	582	if (flags & DP_F_MINUS)
	583	padlen = -padlen; /* Left Justifty */
584
585	if ((flags & DP_F_ZERO) && (padlen > 0)) {
586	if (signvalue) {
587	dopr_outch(buffer, currlen, maxlen, signvalue);
588	--padlen;
589	signvalue = 0;
590	}
591	while (padlen > 0) {
592	dopr_outch(buffer, currlen, maxlen, '0');
593	--padlen;
594	}
595	}
596	while (padlen > 0) {
597	dopr_outch(buffer, currlen, maxlen, ' ');
598	--padlen;
599	}
600	if (signvalue)
601	dopr_outch(buffer, currlen, maxlen, signvalue);
602
603	while (iplace > 0)
604	dopr_outch(buffer, currlen, maxlen, iconvert[--iplace]);
605
606	/*
607	* Decimal point. This should probably use locale to find the correct
608	* char to print out.
609	*/
610	dopr_outch(buffer, currlen, maxlen, '.');
611
612	while (fplace > 0)
613	dopr_outch(buffer, currlen, maxlen, fconvert[--fplace]);
614
615	while (zpadlen > 0) {
616	dopr_outch(buffer, currlen, maxlen, '0');
617	--zpadlen;
618	}
619
620	while (padlen < 0) {
621	dopr_outch(buffer, currlen, maxlen, ' ');
622	++padlen;
623	}
2d9a148e	624	}
2d9a148e	625
f1312c76	626	static void
f1312c76	627	dopr_outch(char buffer, size_t currlen, size_t maxlen, char c)
2d9a148e	628	{
f1312c76	629	if (*currlen < maxlen)
f1312c76	630	buffer[(*currlen)++] = c;
dad3b556	631	}
2d9a148e	632	#endif /* !defined(HAVE_SNPRINTF) \|\| !defined(HAVE_VSNPRINTF) */
dad3b556	633
2d9a148e	634	#ifndef HAVE_VSNPRINTF
f1312c76	635	int
f1312c76	636	vsnprintf(char str, size_t count, const char fmt, va_list args)
dad3b556	637	{
f1312c76	638	str[0] = 0;
	639	dopr(str, count, fmt, args);
	640
	641	return(strlen(str));
dad3b556	642	}
2d9a148e	643	#endif /* !HAVE_VSNPRINTF */
dad3b556	644
2d9a148e	645	#ifndef HAVE_SNPRINTF
f1312c76	646	int
f1312c76	647	snprintf(char str,size_t count,const char fmt,...)
847e8865	648	{
f1312c76	649	va_list ap;
	650
	651	va_start(ap, fmt);
	652	(void) vsnprintf(str, count, fmt, ap);
	653	va_end(ap);
	654
	655	return(strlen(str));
2d9a148e	656	}
	657
	658	#ifdef TEST_SNPRINTF
f1312c76	659	int
f1312c76	660	main(void)
2d9a148e	661	{
f1312c76	662	#define LONG_STRING 1024
	663	char buf1[LONG_STRING];
	664	char buf2[LONG_STRING];
	665	char *fp_fmt[] = {
	666	"%-1.5f",
	667	"%1.5f",
	668	"%123.9f",
	669	"%10.5f",
	670	"% 10.5f",
	671	"%+22.9f",
	672	"%+4.9f",
	673	"%01.3f",
	674	"%4f",
	675	"%3.1f",
	676	"%3.2f",
	677	NULL
	678	};
	679	double fp_nums[] = {
	680	-1.5,
	681	134.21,
	682	91340.2,
	683	341.1234,
	684	0203.9,
	685	0.96,
	686	0.996,
	687	0.9996,
	688	1.996,
	689	4.136,
	690	0
	691	};
	692	char *int_fmt[] = {
	693	"%-1.5d",
	694	"%1.5d",
	695	"%123.9d",
	696	"%5.5d",
	697	"%10.5d",
	698	"% 10.5d",
	699	"%+22.33d",
	700	"%01.3d",
	701	"%4d",
	702	"%lld",
	703	"%qd",
	704	NULL
	705	};
	706	long long int_nums[] = { -1, 134, 91340, 341, 0203, 0, 9999999 };
	707	int x, y;
	708	int fail = 0;
	709	int num = 0;
	710
	711	printf("Testing snprintf format codes against system sprintf...\n");
	712
	713	for (x = 0; fp_fmt[x] != NULL ; x++) {
	714	for (y = 0; fp_nums[y] != 0 ; y++) {
	715	snprintf(buf1, sizeof (buf1), fp_fmt[x], fp_nums[y]);
	716	sprintf (buf2, fp_fmt[x], fp_nums[y]);
	717	if (strcmp (buf1, buf2)) {
	718	printf("snprintf doesn't match Format: %s\n\t"
	719	"snprintf = %s\n\tsprintf = %s\n",
	720	fp_fmt[x], buf1, buf2);
	721	fail++;
	722	}
	723	num++;
	724	}
	725	}
726	for (x = 0; int_fmt[x] != NULL ; x++) {
727	for (y = 0; int_nums[y] != 0 ; y++) {
728	snprintf(buf1, sizeof (buf1), int_fmt[x], int_nums[y]);
729	sprintf(buf2, int_fmt[x], int_nums[y]);
730	if (strcmp (buf1, buf2)) {
731	printf("snprintf doesn't match Format: %s\n\t"
732	"snprintf = %s\n\tsprintf = %s\n",
733	int_fmt[x], buf1, buf2);
734	fail++;
735	}
736	num++;
737	}
738	}
739	printf("%d tests failed out of %d.\n", fail, num);
740	return(0);
847e8865	741	}
2d9a148e	742	#endif /* SNPRINTF_TEST */
847e8865	743
2d9a148e	744	#endif /* !HAVE_SNPRINTF */