/*
* Replacement for a missing snprintf or vsnprintf.
*
* The following implementation of snprintf was taken mostly verbatim from
* <http://www.fiction.net/blong/programs/>; it is the version of snprintf
* used in Mutt. A possibly newer version is used in wget, found at
* <https://github.com/wertarbyte/wget/blob/master/src/snprintf.c>.
*
* Please do not reformat or otherwise change this file more than necessary so
* that later merges with the original source are easy. Bug fixes and
* improvements should be sent back to the original author.
*
* The canonical version of this file is maintained in the rra-c-util package,
* which can be found at <https://www.eyrie.org/~eagle/software/rra-c-util/>.
*/
/*
* If we're running the test suite, rename snprintf and vsnprintf to avoid
* conflicts with the system version.
*/
#if TESTING
# undef snprintf
# undef vsnprintf
# define snprintf test_snprintf
# define vsnprintf test_vsnprintf
#endif
/* Specific to rra-c-util, but only when debugging is enabled. */
#ifdef DEBUG_SNPRINTF
# include <util/messages.h>
#endif
/*
* Copyright Patrick Powell 1995
* This code is based on code written by Patrick Powell (papowell@astart.com)
* It may be used for any purpose as long as this notice remains intact
* on all source code distributions
*
* There is no SPDX-License-Identifier registered for this license.
*/
/**************************************************************
* 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.
*
* Andrew Tridgell (tridge@samba.org) Oct 1998
* fixed handling of %.0f
* added test for HAVE_LONG_DOUBLE
*
* Russ Allbery <eagle@eyrie.org> 2000-08-26
* fixed return value to comply with C99
* fixed handling of snprintf(NULL, ...)
* added explicit casts for double to long long int conversion
* fixed various warnings with GCC 7
* fixed various warnings with Clang
*
* Hrvoje Niksic <hniksic@xemacs.org> 2000-11-04
* include <config.h> instead of "config.h".
* moved TEST_SNPRINTF stuff out of HAVE_SNPRINTF ifdef.
* include <stdio.h> for NULL.
* added support and test cases for long long.
* don't declare argument types to (v)snprintf if stdarg is not used.
* use int instead of short int as 2nd arg to va_arg.
*
* alexk (INN) 2002-08-21
* use LLONG in fmtfp to handle more characters during floating
* point conversion.
*
* herb (Samba) 2002-12-19
* actually print args for %g and %e
*
* Hrvoje Niksic <hniksic@xemacs.org> 2005-04-15
* use the PARAMS macro to handle prototypes.
* write function definitions in the ansi2knr-friendly way.
* if string precision is specified, don't read VALUE past it.
* fix bug in fmtfp that caused 0.01 to be printed as 0.1.
* don't include <ctype.h> because none of it is used.
* interpret precision as number of significant digits with %g
* omit trailing decimal zeros with %g
*
**************************************************************/
#include <config.h>
#include <string.h>
#include <ctype.h>
#include <sys/types.h>
#ifndef NULL
# define NULL 0
#endif
/* varargs declarations: */
#include <stdarg.h>
/* Assume all compilers support long double, per Autoconf documentation. */
#define LDOUBLE long double
#ifdef HAVE_LONG_LONG_INT
# define LLONG long long
#else
# define LLONG long
#endif
int snprintf (char *str, size_t count, const char *fmt, ...);
int vsnprintf (char *str, size_t count, const char *fmt, va_list arg);
static int dopr (char *buffer, size_t maxlen, const char *format,
va_list args);
static int fmtstr (char *buffer, size_t *currlen, size_t maxlen,
const char *value, int flags, int min, int max);
static int fmtint (char *buffer, size_t *currlen, size_t maxlen,
LLONG value, int base, int min, int max, int flags);
static int fmtfp (char *buffer, size_t *currlen, size_t maxlen,
LDOUBLE fvalue, int min, int max, int flags);
static int 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_MOD_L 6
#define DP_S_CONV 7
#define DP_S_DONE 8
/* 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)
#define DP_F_FP_G (1 << 7)
/* Conversion Flags */
#define DP_C_SHORT 1
#define DP_C_LONG 2
#define DP_C_LLONG 3
#define DP_C_LDOUBLE 4
#define char_to_int(p) (p - '0')
#define MAX(p,q) ((p >= q) ? p : q)
#define MIN(p,q) ((p <= q) ? p : q)
static int dopr (char *buffer, size_t maxlen, const char *format, va_list args)
{
char ch;
LLONG value;
LDOUBLE fvalue;
char *strvalue;
int min;
int max;
unsigned int state;
int flags;
int cflags;
int total;
size_t currlen;
state = DP_S_DEFAULT;
currlen = flags = cflags = min = 0;
max = -1;
ch = *format++;
total = 0;
while (state != DP_S_DONE)
{
if (ch == '\0')
state = DP_S_DONE;
switch(state)
{
case DP_S_DEFAULT:
if (ch == '%')
state = DP_S_FLAGS;
else
total += 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 ('0' <= ch && ch <= '9')
{
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 ('0' <= ch && ch <= '9')
{
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++;
break;
case 'L':
cflags = DP_C_LDOUBLE;
ch = *format++;
break;
default:
break;
}
if (cflags != DP_C_LONG)
state = DP_S_CONV;
else
state = DP_S_MOD_L;
break;
case DP_S_MOD_L:
switch (ch)
{
case 'l':
cflags = DP_C_LLONG;
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 = (short int) va_arg (args, int);
else if (cflags == DP_C_LONG)
value = va_arg (args, long int);
else if (cflags == DP_C_LLONG)
value = va_arg (args, LLONG);
else
value = va_arg (args, int);
total += fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags);
break;
case 'o':
flags |= DP_F_UNSIGNED;
if (cflags == DP_C_SHORT)
value = (unsigned short int) va_arg (args, unsigned int);
else if (cflags == DP_C_LONG)
value = va_arg (args, unsigned long int);
else if (cflags == DP_C_LLONG)
value = va_arg (args, unsigned LLONG);
else
value = va_arg (args, unsigned int);
total += fmtint (buffer, &currlen, maxlen, value, 8, min, max, flags);
break;
case 'u':
flags |= DP_F_UNSIGNED;
if (cflags == DP_C_SHORT)
value = (unsigned short int) va_arg (args, unsigned int);
else if (cflags == DP_C_LONG)
value = va_arg (args, unsigned long int);
else if (cflags == DP_C_LLONG)
value = va_arg (args, unsigned LLONG);
else
value = va_arg (args, unsigned int);
total += fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags);
break;
case 'X':
flags |= DP_F_UP;
/* fallthrough */
case 'x':
flags |= DP_F_UNSIGNED;
if (cflags == DP_C_SHORT)
value = (unsigned short int) va_arg (args, unsigned int);
else if (cflags == DP_C_LONG)
value = va_arg (args, unsigned long int);
else if (cflags == DP_C_LLONG)
value = va_arg (args, unsigned LLONG);
else
value = va_arg (args, unsigned int);
total += fmtint (buffer, &currlen, maxlen, value, 16, min, max, flags);
break;
case 'f':
if (cflags == DP_C_LDOUBLE)
fvalue = va_arg (args, LDOUBLE);
else
fvalue = (LDOUBLE) va_arg (args, double);
total += fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags);
break;
case 'E':
flags |= DP_F_UP;
/* fallthrough */
case 'e':
if (cflags == DP_C_LDOUBLE)
fvalue = va_arg (args, LDOUBLE);
else
fvalue = (LDOUBLE) va_arg (args, double);
total += fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags);
break;
case 'G':
flags |= DP_F_UP;
/* fallthrough */
case 'g':
flags |= DP_F_FP_G;
if (cflags == DP_C_LDOUBLE)
fvalue = va_arg (args, LDOUBLE);
else
fvalue = (LDOUBLE) va_arg (args, double);
if (max == 0)
/* C99 says: if precision [for %g] is zero, it is taken as one */
max = 1;
total += fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags);
break;
case 'c':
total += dopr_outch (buffer, &currlen, maxlen,
(char) va_arg (args, int));
break;
case 's':
strvalue = va_arg (args, char *);
total += fmtstr (buffer, &currlen, maxlen, strvalue, flags, min, max);
break;
case 'p':
strvalue = va_arg (args, void *);
total += 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 = (short) currlen;
}
else if (cflags == DP_C_LONG)
{
long int *num;
num = va_arg (args, long int *);
*num = currlen;
}
else if (cflags == DP_C_LLONG)
{
LLONG *num;
num = va_arg (args, LLONG *);
*num = currlen;
}
else
{
int *num;
num = va_arg (args, int *);
*num = (int) currlen;
}
break;
case '%':
total += dopr_outch (buffer, &currlen, maxlen, ch);
break;
case 'w':
/* not supported yet, treat as next char */
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 (buffer != NULL)
{
if (currlen < maxlen - 1)
buffer[currlen] = '\0';
else
buffer[maxlen - 1] = '\0';
}
return total;
}
static int fmtstr (char *buffer, size_t *currlen, size_t maxlen,
const char *value, int flags, int min, int max)
{
int padlen, strln; /* amount to pad */
int cnt = 0;
int total = 0;
if (value == 0)
{
value = "(null)";
}
if (max < 0)
strln = (int) strlen (value);
else
/* When precision is specified, don't read VALUE past precision. */
/*strln = strnlen (value, max);*/
for (strln = 0; strln < max && value[strln]; ++strln);
padlen = min - strln;
if (padlen < 0)
padlen = 0;
if (flags & DP_F_MINUS)
padlen = -padlen; /* Left Justify */
while (padlen > 0)
{
total += dopr_outch (buffer, currlen, maxlen, ' ');
--padlen;
}
while (*value && ((max < 0) || (cnt < max)))
{
total += dopr_outch (buffer, currlen, maxlen, *value++);
++cnt;
}
while (padlen < 0)
{
total += dopr_outch (buffer, currlen, maxlen, ' ');
++padlen;
}
return total;
}
/* Have to handle DP_F_NUM (ie 0x and 0 alternates) */
static int fmtint (char *buffer, size_t *currlen, size_t maxlen,
LLONG value, int base, int min, int max, int flags)
{
char signvalue = 0;
unsigned LLONG uvalue;
char convert[24];
unsigned int place = 0;
int spadlen = 0; /* amount to space pad */
int zpadlen = 0; /* amount to zero pad */
const char *digits;
int total = 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)
/* Should characters be upper case? */
digits = "0123456789ABCDEF";
else
digits = "0123456789abcdef";
do {
convert[place++] = digits[uvalue % (unsigned)base];
uvalue = (uvalue / (unsigned)base );
} while(uvalue && (place < sizeof (convert)));
if (place == sizeof (convert)) place--;
convert[place] = 0;
zpadlen = max - place;
spadlen = min - MAX ((unsigned int)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 */
#ifdef DEBUG_SNPRINTF
debug ("zpad: %d, spad: %d, min: %d, max: %d, place: %u\n",
zpadlen, spadlen, min, max, place);
#endif
/* Spaces */
while (spadlen > 0)
{
total += dopr_outch (buffer, currlen, maxlen, ' ');
--spadlen;
}
/* Sign */
if (signvalue)
total += dopr_outch (buffer, currlen, maxlen, signvalue);
/* Zeros */
if (zpadlen > 0)
{
while (zpadlen > 0)
{
total += dopr_outch (buffer, currlen, maxlen, '0');
--zpadlen;
}
}
/* Digits */
while (place > 0)
total += dopr_outch (buffer, currlen, maxlen, convert[--place]);
/* Left Justified spaces */
while (spadlen < 0) {
total += dopr_outch (buffer, currlen, maxlen, ' ');
++spadlen;
}
return total;
}
static LDOUBLE abs_val (LDOUBLE value)
{
LDOUBLE result = value;
if (value < 0)
result = -value;
return result;
}
static LLONG pow10_int (unsigned int exp)
{
LDOUBLE result = 1;
while (exp)
{
result *= 10;
exp--;
}
return (LLONG) result;
}
static LLONG round_int (LDOUBLE value)
{
LLONG intpart;
intpart = (LLONG) value;
value = value - intpart;
if (value >= (LDOUBLE) 0.5)
intpart++;
return intpart;
}
/*
* GCC 7.1 issues this warning at the point of the function definition header
* (not in any actual code), and I can't figure out what's triggering it since
* the comparison form doesn't appear anywhere in this code. Since this is
* rarely-used portability code, suppress the warning.
*/
#pragma GCC diagnostic ignored "-Wstrict-overflow"
static int fmtfp (char *buffer, size_t *currlen, size_t maxlen,
LDOUBLE fvalue, int min, int max, int flags)
{
char signvalue = 0;
LDOUBLE ufvalue;
char iconvert[24];
char fconvert[24];
size_t iplace = 0;
size_t fplace = 0;
long padlen = 0; /* amount to pad */
long zpadlen = 0;
int total = 0;
LLONG intpart;
LLONG fracpart;
LLONG mask10;
int leadingfrac0s = 0; /* zeroes at the start of fractional part */
int omitzeros = 0;
size_t omitcount = 0;
/*
* 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 = ' ';
#if 0
if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */
#endif
intpart = (LLONG) ufvalue;
/* With %g precision is the number of significant digits, which
includes the digits in intpart. */
if (flags & DP_F_FP_G)
{
if (intpart != 0)
{
/* For each digit of INTPART, print one less fractional digit. */
LLONG temp = intpart;
for (temp = intpart; temp != 0; temp /= 10)
--max;
if (max < 0)
max = 0;
}
else
{
/* For each leading 0 in fractional part, print one more
fractional digit. */
LDOUBLE temp;
if (ufvalue > 0)
for (temp = ufvalue; temp < (LDOUBLE) 0.1; temp *= 10)
++max;
}
}
/* C99: trailing zeros are removed from the fractional portion of the
result unless the # flag is specified */
if ((flags & DP_F_FP_G) && !(flags & DP_F_NUM))
omitzeros = 1;
#if SIZEOF_LONG_LONG > 0
# define MAX_DIGITS 18 /* grok more digits with long long */
#else
# define MAX_DIGITS 9 /* just long */
#endif
/*
* Sorry, we only support several digits past the decimal because of
* our conversion method
*/
if (max > MAX_DIGITS)
max = MAX_DIGITS;
/* Factor of 10 with the needed number of digits, e.g. 1000 for max==3 */
mask10 = pow10_int (max);
/* We "cheat" by converting the fractional part to integer by
* multiplying by a factor of 10
*/
fracpart = round_int (mask10 * (ufvalue - intpart));
if (fracpart >= mask10)
{
intpart++;
fracpart -= mask10;
}
else if (fracpart != 0)
/* If fracpart has less digits than the 10* mask, we need to
manually insert leading 0s. For example 2.01's fractional part
requires one leading zero to distinguish it from 2.1. */
while (fracpart < mask10 / 10)
{
++leadingfrac0s;
mask10 /= 10;
}
#ifdef DEBUG_SNPRINTF
# ifdef HAVE_LONG_LONG_INT
debug ("fmtfp: %Lf =? %lld.%lld\n", fvalue, intpart, fracpart);
# else
debug ("fmtfp: %Lf =? %ld.%ld\n", fvalue, intpart, fracpart);
# endif
#endif
/* Convert integer part */
do {
iconvert[iplace++] = (char) ('0' + (intpart % 10));
intpart = (intpart / 10);
} while(intpart && (iplace < sizeof(iconvert)));
if (iplace == sizeof(iconvert)) iplace--;
iconvert[iplace] = 0;
/* Convert fractional part */
do {
fconvert[fplace++] = (char) ('0' + (fracpart % 10));
fracpart = (fracpart / 10);
} while(fracpart && (fplace < sizeof(fconvert)));
while (leadingfrac0s-- > 0 && fplace < sizeof(fconvert))
fconvert[fplace++] = '0';
if (fplace == sizeof(fconvert)) fplace--;
fconvert[fplace] = 0;
if (omitzeros)
while (omitcount < fplace && fconvert[omitcount] == '0')
++omitcount;
/* -1 for decimal point, another -1 if we are printing a sign */
padlen = min - iplace - (max - omitcount) - 1 - ((signvalue) ? 1 : 0);
if (!omitzeros)
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)
{
total += dopr_outch (buffer, currlen, maxlen, signvalue);
--padlen;
signvalue = 0;
}
while (padlen > 0)
{
total += dopr_outch (buffer, currlen, maxlen, '0');
--padlen;
}
}
while (padlen > 0)
{
total += dopr_outch (buffer, currlen, maxlen, ' ');
--padlen;
}
if (signvalue)
total += dopr_outch (buffer, currlen, maxlen, signvalue);
while (iplace > 0)
total += dopr_outch (buffer, currlen, maxlen, iconvert[--iplace]);
/*
* Decimal point. This should probably use locale to find the correct
* char to print out.
*/
if (max > 0 && (fplace > omitcount || zpadlen > 0))
{
total += dopr_outch (buffer, currlen, maxlen, '.');
while (fplace > omitcount)
total += dopr_outch (buffer, currlen, maxlen, fconvert[--fplace]);
}
while (zpadlen > 0)
{
total += dopr_outch (buffer, currlen, maxlen, '0');
--zpadlen;
}
while (padlen < 0)
{
total += dopr_outch (buffer, currlen, maxlen, ' ');
++padlen;
}
return total;
}
static int dopr_outch (char *buffer, size_t *currlen, size_t maxlen, char c)
{
if (*currlen + 1 < maxlen)
buffer[(*currlen)++] = c;
return 1;
}
int vsnprintf (char *str, size_t count, const char *fmt, va_list args)
{
if (str != NULL)
str[0] = 0;
return dopr(str, count, fmt, args);
}
int snprintf (char *str, size_t count, const char *fmt,...)
{
va_list ap;
int total;
va_start(ap, fmt);
total = vsnprintf(str, count, fmt, ap);
va_end(ap);
return total;
}
#ifdef TEST_SNPRINTF
#ifndef LONG_STRING
#define LONG_STRING 1024
#endif
int main (void)
{
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",
"%.0f",
"%.1f",
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",
NULL
};
long int_nums[] = { -1, 134, 91340, 341, 0203, 0};
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\tsnprintf = %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\tsnprintf = %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 /* TEST_SNPRINTF */