gallium/util: Stop bundling our snprintf implementation.

Use MSVCRT functions instead.  Their semantics are slightly
different but they can be made to work as expected.

Also, use the same code paths for both MSVCRT and MinGW.

https://bugs.freedesktop.org/show_bug.cgi?id=91418

Reviewed-by: Brian Paul <[email protected]>

2 files changed, 31 insertions, 1484 deletions

diff --git a/src/gallium/auxiliary/util/u_snprintf.c b/src/gallium/auxiliary/util/u_snprintf.c
deleted file mode 100644
index 39e9b70d0f8..00000000000
--- a/src/gallium/auxiliary/util/u_snprintf.c
+++ /dev/null
@@ -1,1480 +0,0 @@
-/*
- * Copyright (c) 1995 Patrick Powell.
- *
- * This code is based on code written by Patrick Powell <[email protected]>.
- * It may be used for any purpose as long as this notice remains intact on all
- * source code distributions.
- */
-
-/*
- * Copyright (c) 2008 Holger Weiss.
- *
- * This version of the code is maintained by Holger Weiss <[email protected]>.
- * My changes to the code may freely be used, modified and/or redistributed for
- * any purpose.  It would be nice if additions and fixes to this file (including
- * trivial code cleanups) would be sent back in order to let me include them in
- * the version available at <http://www.jhweiss.de/software/snprintf.html>.
- * However, this is not a requirement for using or redistributing (possibly
- * modified) versions of this file, nor is leaving this notice intact mandatory.
- */
-
-/*
- * History
- *
- * 2008-01-20 Holger Weiss <[email protected]> for C99-snprintf 1.1:
- *
- * 	Fixed the detection of infinite floating point values on IRIX (and
- * 	possibly other systems) and applied another few minor cleanups.
- *
- * 2008-01-06 Holger Weiss <[email protected]> for C99-snprintf 1.0:
- *
- * 	Added a lot of new features, fixed many bugs, and incorporated various
- * 	improvements done by Andrew Tridgell <[email protected]>, Russ Allbery
- * 	<[email protected]>, Hrvoje Niksic <[email protected]>, Damien Miller
- * 	<[email protected]>, and others for the Samba, INN, Wget, and OpenSSH
- * 	projects.  The additions include: support the "e", "E", "g", "G", and
- * 	"F" conversion specifiers (and use conversion style "f" or "F" for the
- * 	still unsupported "a" and "A" specifiers); support the "hh", "ll", "j",
- * 	"t", and "z" length modifiers; support the "#" flag and the (non-C99)
- * 	"'" flag; use localeconv(3) (if available) to get both the current
- * 	locale's decimal point character and the separator between groups of
- * 	digits; fix the handling of various corner cases of field width and
- * 	precision specifications; fix various floating point conversion bugs;
- * 	handle infinite and NaN floating point values; don't attempt to write to
- * 	the output buffer (which may be NULL) if a size of zero was specified;
- * 	check for integer overflow of the field width, precision, and return
- * 	values and during the floating point conversion; use the OUTCHAR() macro
- * 	instead of a function for better performance; provide asprintf(3) and
- * 	vasprintf(3) functions; add new test cases.  The replacement functions
- * 	have been renamed to use an "rpl_" prefix, the function calls in the
- * 	main project (and in this file) must be redefined accordingly for each
- * 	replacement function which is needed (by using Autoconf or other means).
- * 	Various other minor improvements have been applied and the coding style
- * 	was cleaned up for consistency.
- *
- * 2007-07-23 Holger Weiss <[email protected]> for Mutt 1.5.13:
- *
- * 	C99 compliant snprintf(3) and vsnprintf(3) functions return the number
- * 	of characters that would have been written to a sufficiently sized
- * 	buffer (excluding the '\0').  The original code simply returned the
- * 	length of the resulting output string, so that's been fixed.
- *
- * 1998-03-05 Michael Elkins <[email protected]> for Mutt 0.90.8:
- *
- * 	The original code assumed that both snprintf(3) and vsnprintf(3) were
- * 	missing.  Some systems only have snprintf(3) but not vsnprintf(3), so
- * 	the code is now broken down under HAVE_SNPRINTF and HAVE_VSNPRINTF.
- *
- * 1998-01-27 Thomas Roessler <[email protected]> for Mutt 0.89i:
- *
- * 	The PGP code was using unsigned hexadecimal formats.  Unfortunately,
- * 	unsigned formats simply didn't work.
- *
- * 1997-10-22 Brandon Long <[email protected]> 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, formatted the code to Mutt conventions, and removed dead code left
- * 	over from the original.  Also, there is now a builtin-test, run with:
- * 	gcc -DTEST_SNPRINTF -o snprintf snprintf.c -lm && ./snprintf
- *
- * 2996-09-15 Brandon Long <[email protected]> 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.
- */
-
-/*
- * ToDo
- *
- * - Add wide character support.
- * - Add support for "%a" and "%A" conversions.
- * - Create test routines which predefine the expected results.  Our test cases
- *   usually expose bugs in system implementations rather than in ours :-)
- */
-
-/*
- * Usage
- *
- * 1) The following preprocessor macros should be defined to 1 if the feature or
- *    file in question is available on the target system (by using Autoconf or
- *    other means), though basic functionality should be available as long as
- *    HAVE_STDARG_H and HAVE_STDLIB_H are defined correctly:
- *
- *    	HAVE_VSNPRINTF
- *    	HAVE_SNPRINTF
- *    	HAVE_VASPRINTF
- *    	HAVE_ASPRINTF
- *    	HAVE_STDARG_H
- *    	HAVE_STDDEF_H
- *    	HAVE_STDINT_H
- *    	HAVE_STDLIB_H
- *    	HAVE_INTTYPES_H
- *    	HAVE_LOCALE_H
- *    	HAVE_LOCALECONV
- *    	HAVE_LCONV_DECIMAL_POINT
- *    	HAVE_LCONV_THOUSANDS_SEP
- *    	HAVE_LONG_DOUBLE
- *    	HAVE_LONG_LONG_INT
- *    	HAVE_UNSIGNED_LONG_LONG_INT
- *    	HAVE_INTMAX_T
- *    	HAVE_UINTMAX_T
- *    	HAVE_UINTPTR_T
- *    	HAVE_PTRDIFF_T
- *    	HAVE_VA_COPY
- *    	HAVE___VA_COPY
- *
- * 2) The calls to the functions which should be replaced must be redefined
- *    throughout the project files (by using Autoconf or other means):
- *
- *    	#define vsnprintf rpl_vsnprintf
- *    	#define snprintf rpl_snprintf
- *    	#define vasprintf rpl_vasprintf
- *    	#define asprintf rpl_asprintf
- *
- * 3) The required replacement functions should be declared in some header file
- *    included throughout the project files:
- *
- *    	#if HAVE_CONFIG_H
- *    	#include <config.h>
- *    	#endif
- *    	#if HAVE_STDARG_H
- *    	#include <stdarg.h>
- *    	#if !HAVE_VSNPRINTF
- *    	int rpl_vsnprintf(char *, size_t, const char *, va_list);
- *    	#endif
- *    	#if !HAVE_SNPRINTF
- *    	int rpl_snprintf(char *, size_t, const char *, ...);
- *    	#endif
- *    	#if !HAVE_VASPRINTF
- *    	int rpl_vasprintf(char **, const char *, va_list);
- *    	#endif
- *    	#if !HAVE_ASPRINTF
- *    	int rpl_asprintf(char **, const char *, ...);
- *    	#endif
- *    	#endif
- *
- * Autoconf macros for handling step 1 and step 2 are available at
- * <http://www.jhweiss.de/software/snprintf.html>.
- */
-
-#include "pipe/p_config.h"
-
-#if HAVE_CONFIG_H
-#include <config.h>
-#else
-#ifdef _MSC_VER
-#define vsnprintf util_vsnprintf
-#define snprintf util_snprintf
-#define HAVE_VSNPRINTF 0
-#define HAVE_SNPRINTF 0
-#define HAVE_VASPRINTF 1 /* not needed */
-#define HAVE_ASPRINTF 1 /* not needed */
-#define HAVE_STDARG_H 1
-#define HAVE_STDDEF_H 1
-#define HAVE_STDINT_H 1
-#define HAVE_STDLIB_H 1
-#define HAVE_INTTYPES_H 0
-#define HAVE_LOCALE_H 0
-#define HAVE_LOCALECONV 0
-#define HAVE_LCONV_DECIMAL_POINT 0
-#define HAVE_LCONV_THOUSANDS_SEP 0
-#define HAVE_LONG_DOUBLE 0
-#define HAVE_LONG_LONG_INT 1
-#define HAVE_UNSIGNED_LONG_LONG_INT 1
-#define HAVE_INTMAX_T 0
-#define HAVE_UINTMAX_T 0
-#define HAVE_UINTPTR_T 1
-#define HAVE_PTRDIFF_T 1
-#define HAVE_VA_COPY 0
-#define HAVE___VA_COPY 0
-#else
-#define HAVE_VSNPRINTF 1
-#define HAVE_SNPRINTF 1
-#define HAVE_VASPRINTF 1
-#define HAVE_ASPRINTF 1
-#endif
-#endif	/* HAVE_CONFIG_H */
-
-#if !HAVE_SNPRINTF || !HAVE_VSNPRINTF || !HAVE_ASPRINTF || !HAVE_VASPRINTF
-#include <stdio.h>	/* For NULL, size_t, vsnprintf(3), and vasprintf(3). */
-#ifdef VA_START
-#undef VA_START
-#endif	/* defined(VA_START) */
-#ifdef VA_SHIFT
-#undef VA_SHIFT
-#endif	/* defined(VA_SHIFT) */
-#if HAVE_STDARG_H
-#include <stdarg.h>
-#define VA_START(ap, last) va_start(ap, last)
-#define VA_SHIFT(ap, value, type) /* No-op for ANSI C. */
-#else	/* Assume <varargs.h> is available. */
-#include <varargs.h>
-#define VA_START(ap, last) va_start(ap)	/* "last" is ignored. */
-#define VA_SHIFT(ap, value, type) value = va_arg(ap, type)
-#endif	/* HAVE_STDARG_H */
-
-#if !HAVE_VASPRINTF
-#if HAVE_STDLIB_H
-#include <stdlib.h>	/* For malloc(3). */
-#endif	/* HAVE_STDLIB_H */
-#ifdef VA_COPY
-#undef VA_COPY
-#endif	/* defined(VA_COPY) */
-#ifdef VA_END_COPY
-#undef VA_END_COPY
-#endif	/* defined(VA_END_COPY) */
-#if HAVE_VA_COPY
-#define VA_COPY(dest, src) va_copy(dest, src)
-#define VA_END_COPY(ap) va_end(ap)
-#elif HAVE___VA_COPY
-#define VA_COPY(dest, src) __va_copy(dest, src)
-#define VA_END_COPY(ap) va_end(ap)
-#else
-#define VA_COPY(dest, src) (void)mymemcpy(&dest, &src, sizeof(va_list))
-#define VA_END_COPY(ap) /* No-op. */
-#define NEED_MYMEMCPY 1
-static void *mymemcpy(void *, void *, size_t);
-#endif	/* HAVE_VA_COPY */
-#endif	/* !HAVE_VASPRINTF */
-
-#if !HAVE_VSNPRINTF
-#include <limits.h>	/* For *_MAX. */
-#if HAVE_INTTYPES_H
-#include <inttypes.h>	/* For intmax_t (if not defined in <stdint.h>). */
-#endif	/* HAVE_INTTYPES_H */
-#if HAVE_LOCALE_H
-#include <locale.h>	/* For localeconv(3). */
-#endif	/* HAVE_LOCALE_H */
-#if HAVE_STDDEF_H
-#include <stddef.h>	/* For ptrdiff_t. */
-#endif	/* HAVE_STDDEF_H */
-#if HAVE_STDINT_H
-#include <stdint.h>	/* For intmax_t. */
-#endif	/* HAVE_STDINT_H */
-
-/* Support for unsigned long long int.  We may also need ULLONG_MAX. */
-#ifndef ULONG_MAX	/* We may need ULONG_MAX as a fallback. */
-#ifdef UINT_MAX
-#define ULONG_MAX UINT_MAX
-#else
-#define ULONG_MAX INT_MAX
-#endif	/* defined(UINT_MAX) */
-#endif	/* !defined(ULONG_MAX) */
-#ifdef ULLONG
-#undef ULLONG
-#endif	/* defined(ULLONG) */
-#if HAVE_UNSIGNED_LONG_LONG_INT
-#define ULLONG unsigned long long int
-#ifndef ULLONG_MAX
-#define ULLONG_MAX ULONG_MAX
-#endif	/* !defined(ULLONG_MAX) */
-#else
-#define ULLONG unsigned long int
-#ifdef ULLONG_MAX
-#undef ULLONG_MAX
-#endif	/* defined(ULLONG_MAX) */
-#define ULLONG_MAX ULONG_MAX
-#endif	/* HAVE_LONG_LONG_INT */
-
-/* Support for uintmax_t.  We also need UINTMAX_MAX. */
-#ifdef UINTMAX_T
-#undef UINTMAX_T
-#endif	/* defined(UINTMAX_T) */
-#if HAVE_UINTMAX_T || defined(uintmax_t)
-#define UINTMAX_T uintmax_t
-#ifndef UINTMAX_MAX
-#define UINTMAX_MAX ULLONG_MAX
-#endif	/* !defined(UINTMAX_MAX) */
-#else
-#define UINTMAX_T ULLONG
-#ifdef UINTMAX_MAX
-#undef UINTMAX_MAX
-#endif	/* defined(UINTMAX_MAX) */
-#define UINTMAX_MAX ULLONG_MAX
-#endif	/* HAVE_UINTMAX_T || defined(uintmax_t) */
-
-/* Support for long double. */
-#ifndef LDOUBLE
-#if HAVE_LONG_DOUBLE
-#define LDOUBLE long double
-#else
-#define LDOUBLE double
-#endif	/* HAVE_LONG_DOUBLE */
-#endif	/* !defined(LDOUBLE) */
-
-/* Support for long long int. */
-#ifndef LLONG
-#if HAVE_LONG_LONG_INT
-#define LLONG long long int
-#else
-#define LLONG long int
-#endif	/* HAVE_LONG_LONG_INT */
-#endif	/* !defined(LLONG) */
-
-/* Support for intmax_t. */
-#ifndef INTMAX_T
-#if HAVE_INTMAX_T || defined(intmax_t)
-#define INTMAX_T intmax_t
-#else
-#define INTMAX_T LLONG
-#endif	/* HAVE_INTMAX_T || defined(intmax_t) */
-#endif	/* !defined(INTMAX_T) */
-
-/* Support for uintptr_t. */
-#ifndef UINTPTR_T
-#if HAVE_UINTPTR_T || defined(uintptr_t)
-#define UINTPTR_T uintptr_t
-#else
-#define UINTPTR_T unsigned long int
-#endif	/* HAVE_UINTPTR_T || defined(uintptr_t) */
-#endif	/* !defined(UINTPTR_T) */
-
-/* Support for ptrdiff_t. */
-#ifndef PTRDIFF_T
-#if HAVE_PTRDIFF_T || defined(ptrdiff_t)
-#define PTRDIFF_T ptrdiff_t
-#else
-#define PTRDIFF_T long int
-#endif	/* HAVE_PTRDIFF_T || defined(ptrdiff_t) */
-#endif	/* !defined(PTRDIFF_T) */
-
-/*
- * We need an unsigned integer type corresponding to ptrdiff_t (cf. C99:
- * 7.19.6.1, 7).  However, we'll simply use PTRDIFF_T and convert it to an
- * unsigned type if necessary.  This should work just fine in practice.
- */
-#ifndef UPTRDIFF_T
-#define UPTRDIFF_T PTRDIFF_T
-#endif	/* !defined(UPTRDIFF_T) */
-
-/*
- * We need a signed integer type corresponding to size_t (cf. C99: 7.19.6.1, 7).
- * However, we'll simply use size_t and convert it to a signed type if
- * necessary.  This should work just fine in practice.
- */
-#ifndef SSIZE_T
-#define SSIZE_T size_t
-#endif	/* !defined(SSIZE_T) */
-
-/* Either ERANGE or E2BIG should be available everywhere. */
-#ifndef ERANGE
-#define ERANGE E2BIG
-#endif	/* !defined(ERANGE) */
-#ifndef EOVERFLOW
-#define EOVERFLOW ERANGE
-#endif	/* !defined(EOVERFLOW) */
-
-/*
- * Buffer size to hold the octal string representation of UINT128_MAX without
- * nul-termination ("3777777777777777777777777777777777777777777").
- */
-#ifdef MAX_CONVERT_LENGTH
-#undef MAX_CONVERT_LENGTH
-#endif	/* defined(MAX_CONVERT_LENGTH) */
-#define MAX_CONVERT_LENGTH      43
-
-/* Format read states. */
-#define PRINT_S_DEFAULT         0
-#define PRINT_S_FLAGS           1
-#define PRINT_S_WIDTH           2
-#define PRINT_S_DOT             3
-#define PRINT_S_PRECISION       4
-#define PRINT_S_MOD             5
-#define PRINT_S_CONV            6
-
-/* Format flags. */
-#define PRINT_F_MINUS           (1 << 0)
-#define PRINT_F_PLUS            (1 << 1)
-#define PRINT_F_SPACE           (1 << 2)
-#define PRINT_F_NUM             (1 << 3)
-#define PRINT_F_ZERO            (1 << 4)
-#define PRINT_F_QUOTE           (1 << 5)
-#define PRINT_F_UP              (1 << 6)
-#define PRINT_F_UNSIGNED        (1 << 7)
-#define PRINT_F_TYPE_G          (1 << 8)
-#define PRINT_F_TYPE_E          (1 << 9)
-
-/* Conversion flags. */
-#define PRINT_C_CHAR            1
-#define PRINT_C_SHORT           2
-#define PRINT_C_LONG            3
-#define PRINT_C_LLONG           4
-#define PRINT_C_LDOUBLE         5
-#define PRINT_C_SIZE            6
-#define PRINT_C_PTRDIFF         7
-#define PRINT_C_INTMAX          8
-
-#ifndef MAX
-#define MAX(x, y) ((x >= y) ? x : y)
-#endif	/* !defined(MAX) */
-#ifndef CHARTOINT
-#define CHARTOINT(ch) (ch - '0')
-#endif	/* !defined(CHARTOINT) */
-#ifndef ISDIGIT
-#define ISDIGIT(ch) ('0' <= (unsigned char)ch && (unsigned char)ch <= '9')
-#endif	/* !defined(ISDIGIT) */
-#ifndef ISNAN
-#define ISNAN(x) (x != x)
-#endif	/* !defined(ISNAN) */
-#ifndef ISINF
-#define ISINF(x) (x != 0.0 && x + x == x)
-#endif	/* !defined(ISINF) */
-
-#ifdef OUTCHAR
-#undef OUTCHAR
-#endif	/* defined(OUTCHAR) */
-#define OUTCHAR(str, len, size, ch)                                          \
-do {                                                                         \
-	if (len + 1 < size)                                                  \
-		str[len] = ch;                                               \
-	(len)++;                                                             \
-} while (/* CONSTCOND */ 0)
-
-static void fmtstr(char *, size_t *, size_t, const char *, int, int, int);
-static void fmtint(char *, size_t *, size_t, INTMAX_T, int, int, int, int);
-static void fmtflt(char *, size_t *, size_t, LDOUBLE, int, int, int, int *);
-static void printsep(char *, size_t *, size_t);
-static int getnumsep(int);
-static int getexponent(LDOUBLE);
-static int convert(UINTMAX_T, char *, size_t, int, int);
-static UINTMAX_T cast(LDOUBLE);
-static UINTMAX_T myround(LDOUBLE);
-static LDOUBLE mypow10(int);
-
-int
-util_vsnprintf(char *str, size_t size, const char *format, va_list args)
-{
-	LDOUBLE fvalue;
-	INTMAX_T value;
-	unsigned char cvalue;
-	const char *strvalue;
-	INTMAX_T *intmaxptr;
-	PTRDIFF_T *ptrdiffptr;
-	SSIZE_T *sizeptr;
-	LLONG *llongptr;
-	long int *longptr;
-	int *intptr;
-	short int *shortptr;
-	signed char *charptr;
-	size_t len = 0;
-	int overflow = 0;
-	int base = 0;
-	int cflags = 0;
-	int flags = 0;
-	int width = 0;
-	int precision = -1;
-	int state = PRINT_S_DEFAULT;
-	char ch = *format++;
-
-	/*
-	 * C99 says: "If `n' is zero, nothing is written, and `s' may be a null
-	 * pointer." (7.19.6.5, 2)  We're forgiving and allow a NULL pointer
-	 * even if a size larger than zero was specified.  At least NetBSD's
-	 * snprintf(3) does the same, as well as other versions of this file.
-	 * (Though some of these versions will write to a non-NULL buffer even
-	 * if a size of zero was specified, which violates the standard.)
-	 */
-	if (str == NULL && size != 0)
-		size = 0;
-
-	while (ch != '\0')
-		switch (state) {
-		case PRINT_S_DEFAULT:
-			if (ch == '%')
-				state = PRINT_S_FLAGS;
-			else
-				OUTCHAR(str, len, size, ch);
-			ch = *format++;
-			break;
-		case PRINT_S_FLAGS:
-			switch (ch) {
-			case '-':
-				flags |= PRINT_F_MINUS;
-				ch = *format++;
-				break;
-			case '+':
-				flags |= PRINT_F_PLUS;
-				ch = *format++;
-				break;
-			case ' ':
-				flags |= PRINT_F_SPACE;
-				ch = *format++;
-				break;
-			case '#':
-				flags |= PRINT_F_NUM;
-				ch = *format++;
-				break;
-			case '0':
-				flags |= PRINT_F_ZERO;
-				ch = *format++;
-				break;
-			case '\'':	/* SUSv2 flag (not in C99). */
-				flags |= PRINT_F_QUOTE;
-				ch = *format++;
-				break;
-			default:
-				state = PRINT_S_WIDTH;
-				break;
-			}
-			break;
-		case PRINT_S_WIDTH:
-			if (ISDIGIT(ch)) {
-				ch = CHARTOINT(ch);
-				if (width > (INT_MAX - ch) / 10) {
-					overflow = 1;
-					goto out;
-				}
-				width = 10 * width + ch;
-				ch = *format++;
-			} else if (ch == '*') {
-				/*
-				 * C99 says: "A negative field width argument is
-				 * taken as a `-' flag followed by a positive
-				 * field width." (7.19.6.1, 5)
-				 */
-				if ((width = va_arg(args, int)) < 0) {
-					flags |= PRINT_F_MINUS;
-					width = -width;
-				}
-				ch = *format++;
-				state = PRINT_S_DOT;
-			} else
-				state = PRINT_S_DOT;
-			break;
-		case PRINT_S_DOT:
-			if (ch == '.') {
-				state = PRINT_S_PRECISION;
-				ch = *format++;
-			} else
-				state = PRINT_S_MOD;
-			break;
-		case PRINT_S_PRECISION:
-			if (precision == -1)
-				precision = 0;
-			if (ISDIGIT(ch)) {
-				ch = CHARTOINT(ch);
-				if (precision > (INT_MAX - ch) / 10) {
-					overflow = 1;
-					goto out;
-				}
-				precision = 10 * precision + ch;
-				ch = *format++;
-			} else if (ch == '*') {
-				/*
-				 * C99 says: "A negative precision argument is
-				 * taken as if the precision were omitted."
-				 * (7.19.6.1, 5)
-				 */
-				if ((precision = va_arg(args, int)) < 0)
-					precision = -1;
-				ch = *format++;
-				state = PRINT_S_MOD;
-			} else
-				state = PRINT_S_MOD;
-			break;
-		case PRINT_S_MOD:
-			switch (ch) {
-			case 'h':
-				ch = *format++;
-				if (ch == 'h') {	/* It's a char. */
-					ch = *format++;
-					cflags = PRINT_C_CHAR;
-				} else
-					cflags = PRINT_C_SHORT;
-				break;
-			case 'l':
-				ch = *format++;
-				if (ch == 'l') {	/* It's a long long. */
-					ch = *format++;
-					cflags = PRINT_C_LLONG;
-				} else
-					cflags = PRINT_C_LONG;
-				break;
-			case 'L':
-				cflags = PRINT_C_LDOUBLE;
-				ch = *format++;
-				break;
-			case 'j':
-				cflags = PRINT_C_INTMAX;
-				ch = *format++;
-				break;
-			case 't':
-				cflags = PRINT_C_PTRDIFF;
-				ch = *format++;
-				break;
-			case 'z':
-				cflags = PRINT_C_SIZE;
-				ch = *format++;
-				break;
-			}
-			state = PRINT_S_CONV;
-			break;
-		case PRINT_S_CONV:
-			switch (ch) {
-			case 'd':
-				/* FALLTHROUGH */
-			case 'i':
-				switch (cflags) {
-				case PRINT_C_CHAR:
-					value = (signed char)va_arg(args, int);
-					break;
-				case PRINT_C_SHORT:
-					value = (short int)va_arg(args, int);
-					break;
-				case PRINT_C_LONG:
-					value = va_arg(args, long int);
-					break;
-				case PRINT_C_LLONG:
-					value = va_arg(args, LLONG);
-					break;
-				case PRINT_C_SIZE:
-					value = va_arg(args, SSIZE_T);
-					break;
-				case PRINT_C_INTMAX:
-					value = va_arg(args, INTMAX_T);
-					break;
-				case PRINT_C_PTRDIFF:
-					value = va_arg(args, PTRDIFF_T);
-					break;
-				default:
-					value = va_arg(args, int);
-					break;
-				}
-				fmtint(str, &len, size, value, 10, width,
-				    precision, flags);
-				break;
-			case 'X':
-				flags |= PRINT_F_UP;
-				/* FALLTHROUGH */
-			case 'x':
-				base = 16;
-				/* FALLTHROUGH */
-			case 'o':
-				if (base == 0)
-					base = 8;
-				/* FALLTHROUGH */
-			case 'u':
-				if (base == 0)
-					base = 10;
-				flags |= PRINT_F_UNSIGNED;
-				switch (cflags) {
-				case PRINT_C_CHAR:
-					value = (unsigned char)va_arg(args,
-					    unsigned int);
-					break;
-				case PRINT_C_SHORT:
-					value = (unsigned short int)va_arg(args,
-					    unsigned int);
-					break;
-				case PRINT_C_LONG:
-					value = va_arg(args, unsigned long int);
-					break;
-				case PRINT_C_LLONG:
-					value = va_arg(args, ULLONG);
-					break;
-				case PRINT_C_SIZE:
-					value = va_arg(args, size_t);
-					break;
-				case PRINT_C_INTMAX:
-					value = va_arg(args, UINTMAX_T);
-					break;
-				case PRINT_C_PTRDIFF:
-					value = va_arg(args, UPTRDIFF_T);
-					break;
-				default:
-					value = va_arg(args, unsigned int);
-					break;
-				}
-				fmtint(str, &len, size, value, base, width,
-				    precision, flags);
-				break;
-			case 'A':
-				/* Not yet supported, we'll use "%F". */
-				/* FALLTHROUGH */
-			case 'F':
-				flags |= PRINT_F_UP;
-			case 'a':
-				/* Not yet supported, we'll use "%f". */
-				/* FALLTHROUGH */
-			case 'f':
-				if (cflags == PRINT_C_LDOUBLE)
-					fvalue = va_arg(args, LDOUBLE);
-				else
-					fvalue = va_arg(args, double);
-				fmtflt(str, &len, size, fvalue, width,
-				    precision, flags, &overflow);
-				if (overflow)
-					goto out;
-				break;
-			case 'E':
-				flags |= PRINT_F_UP;
-				/* FALLTHROUGH */
-			case 'e':
-				flags |= PRINT_F_TYPE_E;
-				if (cflags == PRINT_C_LDOUBLE)
-					fvalue = va_arg(args, LDOUBLE);
-				else
-					fvalue = va_arg(args, double);
-				fmtflt(str, &len, size, fvalue, width,
-				    precision, flags, &overflow);
-				if (overflow)
-					goto out;
-				break;
-			case 'G':
-				flags |= PRINT_F_UP;
-				/* FALLTHROUGH */
-			case 'g':
-				flags |= PRINT_F_TYPE_G;
-				if (cflags == PRINT_C_LDOUBLE)
-					fvalue = va_arg(args, LDOUBLE);
-				else
-					fvalue = va_arg(args, double);
-				/*
-				 * If the precision is zero, it is treated as
-				 * one (cf. C99: 7.19.6.1, 8).
-				 */
-				if (precision == 0)
-					precision = 1;
-				fmtflt(str, &len, size, fvalue, width,
-				    precision, flags, &overflow);
-				if (overflow)
-					goto out;
-				break;
-			case 'c':
-				cvalue = (unsigned char)va_arg(args, int);
-				OUTCHAR(str, len, size, cvalue);
-				break;
-			case 's':
-				strvalue = va_arg(args, char *);
-				fmtstr(str, &len, size, strvalue, width,
-				    precision, flags);
-				break;
-			case 'p':
-				/*
-				 * C99 says: "The value of the pointer is
-				 * converted to a sequence of printing
-				 * characters, in an implementation-defined
-				 * manner." (C99: 7.19.6.1, 8)
-				 */
-				if ((strvalue = va_arg(args, void *)) == NULL)
-					/*
-					 * We use the glibc format.  BSD prints
-					 * "0x0", SysV "0".
-					 */
-					fmtstr(str, &len, size, "(nil)", width,
-					    -1, flags);
-				else {
-					/*
-					 * We use the BSD/glibc format.  SysV
-					 * omits the "0x" prefix (which we emit
-					 * using the PRINT_F_NUM flag).
-					 */
-					flags |= PRINT_F_NUM;
-					flags |= PRINT_F_UNSIGNED;
-					fmtint(str, &len, size,
-					    (UINTPTR_T)strvalue, 16, width,
-					    precision, flags);
-				}
-				break;
-			case 'n':
-				switch (cflags) {
-				case PRINT_C_CHAR:
-					charptr = va_arg(args, signed char *);
-					*charptr = (signed char)len;
-					break;
-				case PRINT_C_SHORT:
-					shortptr = va_arg(args, short int *);
-					*shortptr = (short int)len;
-					break;
-				case PRINT_C_LONG:
-					longptr = va_arg(args, long int *);
-					*longptr = (long int)len;
-					break;
-				case PRINT_C_LLONG:
-					llongptr = va_arg(args, LLONG *);
-					*llongptr = (LLONG)len;
-					break;
-				case PRINT_C_SIZE:
-					/*
-					 * C99 says that with the "z" length
-					 * modifier, "a following `n' conversion
-					 * specifier applies to a pointer to a
-					 * signed integer type corresponding to
-					 * size_t argument." (7.19.6.1, 7)
-					 */
-					sizeptr = va_arg(args, SSIZE_T *);
-					*sizeptr = len;
-					break;
-				case PRINT_C_INTMAX:
-					intmaxptr = va_arg(args, INTMAX_T *);
-					*intmaxptr = len;
-					break;
-				case PRINT_C_PTRDIFF:
-					ptrdiffptr = va_arg(args, PTRDIFF_T *);
-					*ptrdiffptr = len;
-					break;
-				default:
-					intptr = va_arg(args, int *);
-					*intptr = (int)len;
-					break;
-				}
-				break;
-			case '%':	/* Print a "%" character verbatim. */
-				OUTCHAR(str, len, size, ch);
-				break;
-			default:	/* Skip other characters. */
-				break;
-			}
-			ch = *format++;
-			state = PRINT_S_DEFAULT;
-			base = cflags = flags = width = 0;
-			precision = -1;
-			break;
-		}
-out:
-	if (len < size)
-		str[len] = '\0';
-	else if (size > 0)
-		str[size - 1] = '\0';
-
-	if (overflow || len >= INT_MAX) {
-		return -1;
-	}
-	return (int)len;
-}
-
-static void
-fmtstr(char *str, size_t *len, size_t size, const char *value, int width,
-       int precision, int flags)
-{
-	int padlen, strln;	/* Amount to pad. */
-	int noprecision = (precision == -1);
-
-	if (value == NULL)	/* We're forgiving. */
-		value = "(null)";
-
-	/* If a precision was specified, don't read the string past it. */
-	for (strln = 0; value[strln] != '\0' &&
-	    (noprecision || strln < precision); strln++)
-		continue;
-
-	if ((padlen = width - strln) < 0)
-		padlen = 0;
-	if (flags & PRINT_F_MINUS)	/* Left justify. */
-		padlen = -padlen;
-
-	while (padlen > 0) {	/* Leading spaces. */
-		OUTCHAR(str, *len, size, ' ');
-		padlen--;
-	}
-	while (*value != '\0' && (noprecision || precision-- > 0)) {
-		OUTCHAR(str, *len, size, *value);
-		value++;
-	}
-	while (padlen < 0) {	/* Trailing spaces. */
-		OUTCHAR(str, *len, size, ' ');
-		padlen++;
-	}
-}
-
-static void
-fmtint(char *str, size_t *len, size_t size, INTMAX_T value, int base, int width,
-       int precision, int flags)
-{
-	UINTMAX_T uvalue;
-	char iconvert[MAX_CONVERT_LENGTH];
-	char sign = 0;
-	char hexprefix = 0;
-	int spadlen = 0;	/* Amount to space pad. */
-	int zpadlen = 0;	/* Amount to zero pad. */
-	int pos;
-	int separators = (flags & PRINT_F_QUOTE);
-	int noprecision = (precision == -1);
-
-	if (flags & PRINT_F_UNSIGNED)
-		uvalue = value;
-	else {
-		uvalue = (value >= 0) ? value : -value;
-		if (value < 0)
-			sign = '-';
-		else if (flags & PRINT_F_PLUS)	/* Do a sign. */
-			sign = '+';
-		else if (flags & PRINT_F_SPACE)
-			sign = ' ';
-	}
-
-	pos = convert(uvalue, iconvert, sizeof(iconvert), base,
-	    flags & PRINT_F_UP);
-
-	if (flags & PRINT_F_NUM && uvalue != 0) {
-		/*
-		 * C99 says: "The result is converted to an `alternative form'.
-		 * For `o' conversion, it increases the precision, if and only
-		 * if necessary, to force the first digit of the result to be a
-		 * zero (if the value and precision are both 0, a single 0 is
-		 * printed).  For `x' (or `X') conversion, a nonzero result has
-		 * `0x' (or `0X') prefixed to it." (7.19.6.1, 6)
-		 */
-		switch (base) {
-		case 8:
-			if (precision <= pos)
-				precision = pos + 1;
-			break;
-		case 16:
-			hexprefix = (flags & PRINT_F_UP) ? 'X' : 'x';
-			break;
-		}
-	}
-
-	if (separators)	/* Get the number of group separators we'll print. */
-		separators = getnumsep(pos);
-
-	zpadlen = precision - pos - separators;
-	spadlen = width                         /* Minimum field width. */
-	    - separators                        /* Number of separators. */
-	    - MAX(precision, pos)               /* Number of integer digits. */
-	    - ((sign != 0) ? 1 : 0)             /* Will we print a sign? */
-	    - ((hexprefix != 0) ? 2 : 0);       /* Will we print a prefix? */
-
-	if (zpadlen < 0)
-		zpadlen = 0;
-	if (spadlen < 0)
-		spadlen = 0;
-
-	/*
-	 * C99 says: "If the `0' and `-' flags both appear, the `0' flag is
-	 * ignored.  For `d', `i', `o', `u', `x', and `X' conversions, if a
-	 * precision is specified, the `0' flag is ignored." (7.19.6.1, 6)
-	 */
-	if (flags & PRINT_F_MINUS)	/* Left justify. */
-		spadlen = -spadlen;
-	else if (flags & PRINT_F_ZERO && noprecision) {
-		zpadlen += spadlen;
-		spadlen = 0;
-	}
-	while (spadlen > 0) {	/* Leading spaces. */
-		OUTCHAR(str, *len, size, ' ');
-		spadlen--;
-	}
-	if (sign != 0)	/* Sign. */
-		OUTCHAR(str, *len, size, sign);
-	if (hexprefix != 0) {	/* A "0x" or "0X" prefix. */
-		OUTCHAR(str, *len, size, '0');
-		OUTCHAR(str, *len, size, hexprefix);
-	}
-	while (zpadlen > 0) {	/* Leading zeros. */
-		OUTCHAR(str, *len, size, '0');
-		zpadlen--;
-	}
-	while (pos > 0) {	/* The actual digits. */
-		pos--;
-		OUTCHAR(str, *len, size, iconvert[pos]);
-		if (separators > 0 && pos > 0 && pos % 3 == 0)
-			printsep(str, len, size);
-	}
-	while (spadlen < 0) {	/* Trailing spaces. */
-		OUTCHAR(str, *len, size, ' ');
-		spadlen++;
-	}
-}
-
-static void
-fmtflt(char *str, size_t *len, size_t size, LDOUBLE fvalue, int width,
-       int precision, int flags, int *overflow)
-{
-	LDOUBLE ufvalue;
-	UINTMAX_T intpart;
-	UINTMAX_T fracpart;
-	UINTMAX_T mask;
-	const char *infnan = NULL;
-	char iconvert[MAX_CONVERT_LENGTH];
-	char fconvert[MAX_CONVERT_LENGTH];
-	char econvert[4];	/* "e-12" (without nul-termination). */
-	char esign = 0;
-	char sign = 0;
-	int leadfraczeros = 0;
-	int exponent = 0;
-	int emitpoint = 0;
-	int omitzeros = 0;
-	int omitcount = 0;
-	int padlen = 0;
-	int epos = 0;
-	int fpos = 0;
-	int ipos = 0;
-	int separators = (flags & PRINT_F_QUOTE);
-	int estyle = (flags & PRINT_F_TYPE_E);
-#if HAVE_LOCALECONV && HAVE_LCONV_DECIMAL_POINT
-	struct lconv *lc = localeconv();
-#endif	/* HAVE_LOCALECONV && HAVE_LCONV_DECIMAL_POINT */
-
-	/*
-	 * AIX' man page says the default is 0, but C99 and at least Solaris'
-	 * and NetBSD's man pages say the default is 6, and sprintf(3) on AIX
-	 * defaults to 6.
-	 */
-	if (precision == -1)
-		precision = 6;
-
-	if (fvalue < 0.0)
-		sign = '-';
-	else if (flags & PRINT_F_PLUS)	/* Do a sign. */
-		sign = '+';
-	else if (flags & PRINT_F_SPACE)
-		sign = ' ';
-
-	if (ISNAN(fvalue))
-		infnan = (flags & PRINT_F_UP) ? "NAN" : "nan";
-	else if (ISINF(fvalue))
-		infnan = (flags & PRINT_F_UP) ? "INF" : "inf";
-
-	if (infnan != NULL) {
-		if (sign != 0)
-			iconvert[ipos++] = sign;
-		while (*infnan != '\0')
-			iconvert[ipos++] = *infnan++;
-		fmtstr(str, len, size, iconvert, width, ipos, flags);
-		return;
-	}
-
-	/* "%e" (or "%E") or "%g" (or "%G") conversion. */
-	if (flags & PRINT_F_TYPE_E || flags & PRINT_F_TYPE_G) {
-		if (flags & PRINT_F_TYPE_G) {
-			/*
-			 * For "%g" (and "%G") conversions, the precision
-			 * specifies the number of significant digits, which
-			 * includes the digits in the integer part.  The
-			 * conversion will or will not be using "e-style" (like
-			 * "%e" or "%E" conversions) depending on the precision
-			 * and on the exponent.  However, the exponent can be
-			 * affected by rounding the converted value, so we'll
-			 * leave this decision for later.  Until then, we'll
-			 * assume that we're going to do an "e-style" conversion
-			 * (in order to get the exponent calculated).  For
-			 * "e-style", the precision must be decremented by one.
-			 */
-			precision--;
-			/*
-			 * For "%g" (and "%G") conversions, trailing zeros are
-			 * removed from the fractional portion of the result
-			 * unless the "#" flag was specified.
-			 */
-			if (!(flags & PRINT_F_NUM))
-				omitzeros = 1;
-		}
-		exponent = getexponent(fvalue);
-		estyle = 1;
-	}
-
-again:
-	/*
-	 * Sorry, we only support 9, 19, or 38 digits (that is, the number of
-	 * digits of the 32-bit, the 64-bit, or the 128-bit UINTMAX_MAX value
-	 * minus one) past the decimal point due to our conversion method.
-	 */
-	switch (sizeof(UINTMAX_T)) {
-	case 16:
-		if (precision > 38)
-			precision = 38;
-		break;
-	case 8:
-		if (precision > 19)
-			precision = 19;
-		break;
-	default:
-		if (precision > 9)
-			precision = 9;
-		break;
-	}
-
-	ufvalue = (fvalue >= 0.0) ? fvalue : -fvalue;
-	if (estyle)	/* We want exactly one integer digit. */
-		ufvalue /= mypow10(exponent);
-
-	if ((intpart = cast(ufvalue)) == UINTMAX_MAX) {
-		*overflow = 1;
-		return;
-	}
-
-	/*
-	 * Factor of ten with the number of digits needed for the fractional
-	 * part.  For example, if the precision is 3, the mask will be 1000.
-	 */
-	mask = (UINTMAX_T)mypow10(precision);
-	/*
-	 * We "cheat" by converting the fractional part to integer by
-	 * multiplying by a factor of ten.
-	 */
-	if ((fracpart = myround(mask * (ufvalue - intpart))) >= mask) {
-		/*
-		 * For example, ufvalue = 2.99962, intpart = 2, and mask = 1000
-		 * (because precision = 3).  Now, myround(1000 * 0.99962) will
-		 * return 1000.  So, the integer part must be incremented by one
-		 * and the fractional part must be set to zero.
-		 */
-		intpart++;
-		fracpart = 0;
-		if (estyle && intpart == 10) {
-			/*
-			 * The value was rounded up to ten, but we only want one
-			 * integer digit if using "e-style".  So, the integer
-			 * part must be set to one and the exponent must be
-			 * incremented by one.
-			 */
-			intpart = 1;
-			exponent++;
-		}
-	}
-
-	/*
-	 * Now that we know the real exponent, we can check whether or not to
-	 * use "e-style" for "%g" (and "%G") conversions.  If we don't need
-	 * "e-style", the precision must be adjusted and the integer and
-	 * fractional parts must be recalculated from the original value.
-	 *
-	 * C99 says: "Let P equal the precision if nonzero, 6 if the precision
-	 * is omitted, or 1 if the precision is zero.  Then, if a conversion
-	 * with style `E' would have an exponent of X:
-	 *
-	 * - if P > X >= -4, the conversion is with style `f' (or `F') and
-	 *   precision P - (X + 1).
-	 *
-	 * - otherwise, the conversion is with style `e' (or `E') and precision
-	 *   P - 1." (7.19.6.1, 8)
-	 *
-	 * Note that we had decremented the precision by one.
-	 */
-	if (flags & PRINT_F_TYPE_G && estyle &&
-	    precision + 1 > exponent && exponent >= -4) {
-		precision -= exponent;
-		estyle = 0;
-		goto again;
-	}
-
-	if (estyle) {
-		if (exponent < 0) {
-			exponent = -exponent;
-			esign = '-';
-		} else
-			esign = '+';
-
-		/*
-		 * Convert the exponent.  The sizeof(econvert) is 4.  So, the
-		 * econvert buffer can hold e.g. "e+99" and "e-99".  We don't
-		 * support an exponent which contains more than two digits.
-		 * Therefore, the following stores are safe.
-		 */
-		epos = convert(exponent, econvert, 2, 10, 0);
-		/*
-		 * C99 says: "The exponent always contains at least two digits,
-		 * and only as many more digits as necessary to represent the
-		 * exponent." (7.19.6.1, 8)
-		 */
-		if (epos == 1)
-			econvert[epos++] = '0';
-		econvert[epos++] = esign;
-		econvert[epos++] = (flags & PRINT_F_UP) ? 'E' : 'e';
-	}
-
-	/* Convert the integer part and the fractional part. */
-	ipos = convert(intpart, iconvert, sizeof(iconvert), 10, 0);
-	if (fracpart != 0)	/* convert() would return 1 if fracpart == 0. */
-		fpos = convert(fracpart, fconvert, sizeof(fconvert), 10, 0);
-
-	leadfraczeros = precision - fpos;
-
-	if (omitzeros) {
-		if (fpos > 0)	/* Omit trailing fractional part zeros. */
-			while (omitcount < fpos && fconvert[omitcount] == '0')
-				omitcount++;
-		else {	/* The fractional part is zero, omit it completely. */
-			omitcount = precision;
-			leadfraczeros = 0;
-		}
-		precision -= omitcount;
-	}
-
-	/*
-	 * Print a decimal point if either the fractional part is non-zero
-	 * and/or the "#" flag was specified.
-	 */
-	if (precision > 0 || flags & PRINT_F_NUM)
-		emitpoint = 1;
-	if (separators)	/* Get the number of group separators we'll print. */
-		separators = getnumsep(ipos);
-
-	padlen = width                  /* Minimum field width. */
-	    - ipos                      /* Number of integer digits. */
-	    - epos                      /* Number of exponent characters. */
-	    - precision                 /* Number of fractional digits. */
-	    - separators                /* Number of group separators. */
-	    - (emitpoint ? 1 : 0)       /* Will we print a decimal point? */
-	    - ((sign != 0) ? 1 : 0);    /* Will we print a sign character? */
-
-	if (padlen < 0)
-		padlen = 0;
-
-	/*
-	 * C99 says: "If the `0' and `-' flags both appear, the `0' flag is
-	 * ignored." (7.19.6.1, 6)
-	 */
-	if (flags & PRINT_F_MINUS)	/* Left justifty. */
-		padlen = -padlen;
-	else if (flags & PRINT_F_ZERO && padlen > 0) {
-		if (sign != 0) {	/* Sign. */
-			OUTCHAR(str, *len, size, sign);
-			sign = 0;
-		}
-		while (padlen > 0) {	/* Leading zeros. */
-			OUTCHAR(str, *len, size, '0');
-			padlen--;
-		}
-	}
-	while (padlen > 0) {	/* Leading spaces. */
-		OUTCHAR(str, *len, size, ' ');
-		padlen--;
-	}
-	if (sign != 0)	/* Sign. */
-		OUTCHAR(str, *len, size, sign);
-	while (ipos > 0) {	/* Integer part. */
-		ipos--;
-		OUTCHAR(str, *len, size, iconvert[ipos]);
-		if (separators > 0 && ipos > 0 && ipos % 3 == 0)
-			printsep(str, len, size);
-	}
-	if (emitpoint) {	/* Decimal point. */
-#if HAVE_LOCALECONV && HAVE_LCONV_DECIMAL_POINT
-		if (lc->decimal_point != NULL && *lc->decimal_point != '\0')
-			OUTCHAR(str, *len, size, *lc->decimal_point);
-		else	/* We'll always print some decimal point character. */
-#endif	/* HAVE_LOCALECONV && HAVE_LCONV_DECIMAL_POINT */
-			OUTCHAR(str, *len, size, '.');
-	}
-	while (leadfraczeros > 0) {	/* Leading fractional part zeros. */
-		OUTCHAR(str, *len, size, '0');
-		leadfraczeros--;
-	}
-	while (fpos > omitcount) {	/* The remaining fractional part. */
-		fpos--;
-		OUTCHAR(str, *len, size, fconvert[fpos]);
-	}
-	while (epos > 0) {	/* Exponent. */
-		epos--;
-		OUTCHAR(str, *len, size, econvert[epos]);
-	}
-	while (padlen < 0) {	/* Trailing spaces. */
-		OUTCHAR(str, *len, size, ' ');
-		padlen++;
-	}
-}
-
-static void
-printsep(char *str, size_t *len, size_t size)
-{
-#if HAVE_LOCALECONV && HAVE_LCONV_THOUSANDS_SEP
-	struct lconv *lc = localeconv();
-	int i;
-
-	if (lc->thousands_sep != NULL)
-		for (i = 0; lc->thousands_sep[i] != '\0'; i++)
-			OUTCHAR(str, *len, size, lc->thousands_sep[i]);
-	else
-#endif	/* HAVE_LOCALECONV && HAVE_LCONV_THOUSANDS_SEP */
-		OUTCHAR(str, *len, size, ',');
-}
-
-static int
-getnumsep(int digits)
-{
-	int separators = (digits - ((digits % 3 == 0) ? 1 : 0)) / 3;
-#if HAVE_LOCALECONV && HAVE_LCONV_THOUSANDS_SEP
-	int strln;
-	struct lconv *lc = localeconv();
-
-	/* We support an arbitrary separator length (including zero). */
-	if (lc->thousands_sep != NULL) {
-		for (strln = 0; lc->thousands_sep[strln] != '\0'; strln++)
-			continue;
-		separators *= strln;
-	}
-#endif	/* HAVE_LOCALECONV && HAVE_LCONV_THOUSANDS_SEP */
-	return separators;
-}
-
-static int
-getexponent(LDOUBLE value)
-{
-	LDOUBLE tmp = (value >= 0.0) ? value : -value;
-	int exponent = 0;
-
-	/*
-	 * We check for 99 > exponent > -99 in order to work around possible
-	 * endless loops which could happen (at least) in the second loop (at
-	 * least) if we're called with an infinite value.  However, we checked
-	 * for infinity before calling this function using our ISINF() macro, so
-	 * this might be somewhat paranoid.
-	 */
-	while (tmp < 1.0 && tmp > 0.0 && --exponent > -99)
-		tmp *= 10;
-	while (tmp >= 10.0 && ++exponent < 99)
-		tmp /= 10;
-
-	return exponent;
-}
-
-static int
-convert(UINTMAX_T value, char *buf, size_t size, int base, int caps)
-{
-	const char *digits = caps ? "0123456789ABCDEF" : "0123456789abcdef";
-	size_t pos = 0;
-
-	/* We return an unterminated buffer with the digits in reverse order. */
-	do {
-		buf[pos++] = digits[value % base];
-		value /= base;
-	} while (value != 0 && pos < size);
-
-	return (int)pos;
-}
-
-static UINTMAX_T
-cast(LDOUBLE value)
-{
-	UINTMAX_T result;
-
-	/*
-	 * We check for ">=" and not for ">" because if UINTMAX_MAX cannot be
-	 * represented exactly as an LDOUBLE value (but is less than LDBL_MAX),
-	 * it may be increased to the nearest higher representable value for the
-	 * comparison (cf. C99: 6.3.1.4, 2).  It might then equal the LDOUBLE
-	 * value although converting the latter to UINTMAX_T would overflow.
-	 */
-	if (value >= UINTMAX_MAX)
-		return UINTMAX_MAX;
-
-	result = (UINTMAX_T)value;
-	/*
-	 * At least on NetBSD/sparc64 3.0.2 and 4.99.30, casting long double to
-	 * an integer type converts e.g. 1.9 to 2 instead of 1 (which violates
-	 * the standard).  Sigh.
-	 */
-	return (result <= value) ? result : result - 1;
-}
-
-static UINTMAX_T
-myround(LDOUBLE value)
-{
-	UINTMAX_T intpart = cast(value);
-
-	return ((value -= intpart) < 0.5) ? intpart : intpart + 1;
-}
-
-static LDOUBLE
-mypow10(int exponent)
-{
-	LDOUBLE result = 1;
-
-	while (exponent > 0) {
-		result *= 10;
-		exponent--;
-	}
-	while (exponent < 0) {
-		result /= 10;
-		exponent++;
-	}
-	return result;
-}
-#endif	/* !HAVE_VSNPRINTF */
-
-#if !HAVE_VASPRINTF
-#if NEED_MYMEMCPY
-void *
-mymemcpy(void *dst, void *src, size_t len)
-{
-	const char *from = src;
-	char *to = dst;
-
-	/* No need for optimization, we use this only to replace va_copy(3). */
-	while (len-- > 0)
-		*to++ = *from++;
-	return dst;
-}
-#endif	/* NEED_MYMEMCPY */
-
-int
-util_vasprintf(char **ret, const char *format, va_list ap)
-{
-	size_t size;
-	int len;
-	va_list aq;
-
-	VA_COPY(aq, ap);
-	len = vsnprintf(NULL, 0, format, aq);
-	VA_END_COPY(aq);
-	if (len < 0 || (*ret = malloc(size = len + 1)) == NULL)
-		return -1;
-	return vsnprintf(*ret, size, format, ap);
-}
-#endif	/* !HAVE_VASPRINTF */
-
-#if !HAVE_SNPRINTF
-#if HAVE_STDARG_H
-int
-util_snprintf(char *str, size_t size, const char *format, ...)
-#else
-int
-util_snprintf(va_alist) va_dcl
-#endif	/* HAVE_STDARG_H */
-{
-#if !HAVE_STDARG_H
-	char *str;
-	size_t size;
-	char *format;
-#endif	/* HAVE_STDARG_H */
-	va_list ap;
-	int len;
-
-	VA_START(ap, format);
-	VA_SHIFT(ap, str, char *);
-	VA_SHIFT(ap, size, size_t);
-	VA_SHIFT(ap, format, const char *);
-	len = vsnprintf(str, size, format, ap);
-	va_end(ap);
-	return len;
-}
-#endif	/* !HAVE_SNPRINTF */
-
-#if !HAVE_ASPRINTF
-#if HAVE_STDARG_H
-int
-util_asprintf(char **ret, const char *format, ...)
-#else
-int
-util_asprintf(va_alist) va_dcl
-#endif	/* HAVE_STDARG_H */
-{
-#if !HAVE_STDARG_H
-	char **ret;
-	char *format;
-#endif	/* HAVE_STDARG_H */
-	va_list ap;
-	int len;
-
-	VA_START(ap, format);
-	VA_SHIFT(ap, ret, char **);
-	VA_SHIFT(ap, format, const char *);
-	len = vasprintf(ret, format, ap);
-	va_end(ap);
-	return len;
-}
-#endif	/* !HAVE_ASPRINTF */
-#else	/* Dummy declaration to avoid empty translation unit warnings. */
-int main(void);
-#endif	/* !HAVE_SNPRINTF || !HAVE_VSNPRINTF || !HAVE_ASPRINTF || [...] */
-
-
-/* vim: set joinspaces textwidth=80: */
diff --git a/src/gallium/auxiliary/util/u_string.h b/src/gallium/auxiliary/util/u_string.h
index da3e2675d8e..f7ab09c8f1c 100644
--- a/src/gallium/auxiliary/util/u_string.h
+++ b/src/gallium/auxiliary/util/u_string.h
@@ -35,13 +35,14 @@
 #ifndef U_STRING_H_
 #define U_STRING_H_
 
-#if !defined(_MSC_VER) && !defined(XF86_LIBC_H)
+#if !defined(XF86_LIBC_H)
 #include <stdio.h>
 #endif
 #include <stddef.h>
 #include <stdarg.h>
 
 #include "pipe/p_compiler.h"
+#include "util/macros.h" // PRINTFLIKE
 
 
 #ifdef __cplusplus
@@ -64,10 +65,35 @@ util_strchrnul(const char *s, char c)
 
 #endif
 
-#ifdef _MSC_VER
+#ifdef _WIN32
 
-int util_vsnprintf(char *, size_t, const char *, va_list);
-int util_snprintf(char *str, size_t size, const char *format, ...);
+static inline int
+util_vsnprintf(char *str, size_t size, const char *format, va_list ap)
+{
+   /* We need to use _vscprintf to calculate the length as vsnprintf returns -1
+    * if the number of characters to write is greater than count.
+    */
+   va_list ap_copy;
+   int ret;
+   va_copy(ap_copy, ap);
+   ret = _vsnprintf(str, size, format, ap);
+   if (ret < 0) {
+      ret = _vscprintf(format, ap_copy);
+   }
+   return ret;
+}
+
+static inline int
+   PRINTFLIKE(3, 4)
+util_snprintf(char *str, size_t size, const char *format, ...)
+{
+   va_list ap;
+   int ret;
+   va_start(ap, format);
+   ret = util_vsnprintf(str, size, format, ap);
+   va_end(ap);
+   return ret;
+}
 
 static inline void
 util_vsprintf(char *str, const char *format, va_list ap)
@@ -76,6 +102,7 @@ util_vsprintf(char *str, const char *format, va_list ap)
 }
 
 static inline void
+   PRINTFLIKE(2, 3)
 util_sprintf(char *str, const char *format, ...)
 {
    va_list ap;