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authormarha <marha@users.sourceforge.net>2011-12-05 07:42:31 +0100
committermarha <marha@users.sourceforge.net>2011-12-05 07:42:31 +0100
commit528f5bd58a139174170c4130c67dca30193c9057 (patch)
tree550c818095dbc607deaddf166c77116ccd91ef54 /mesalib/src/gallium/auxiliary/util/u_snprintf.c
parent2cfebffb491807a465a8e5f7daca582d8aefb829 (diff)
downloadvcxsrv-528f5bd58a139174170c4130c67dca30193c9057.tar.gz
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xserver xkeyboard-config mesa git update 5 dec 2011
Diffstat (limited to 'mesalib/src/gallium/auxiliary/util/u_snprintf.c')
-rw-r--r--mesalib/src/gallium/auxiliary/util/u_snprintf.c2986
1 files changed, 1489 insertions, 1497 deletions
diff --git a/mesalib/src/gallium/auxiliary/util/u_snprintf.c b/mesalib/src/gallium/auxiliary/util/u_snprintf.c
index a601df4e5..f0d53b3ce 100644
--- a/mesalib/src/gallium/auxiliary/util/u_snprintf.c
+++ b/mesalib/src/gallium/auxiliary/util/u_snprintf.c
@@ -1,1497 +1,1489 @@
-/*
- * Copyright (c) 1995 Patrick Powell.
- *
- * 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.
- */
-
-/*
- * Copyright (c) 2008 Holger Weiss.
- *
- * This version of the code is maintained by Holger Weiss <holger@jhweiss.de>.
- * 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 <holger@jhweiss.de> 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 <holger@jhweiss.de> for C99-snprintf 1.0:
- *
- * Added a lot of new features, fixed many bugs, and incorporated various
- * improvements done by Andrew Tridgell <tridge@samba.org>, Russ Allbery
- * <rra@stanford.edu>, Hrvoje Niksic <hniksic@xemacs.org>, Damien Miller
- * <djm@mindrot.org>, 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 <holger@jhweiss.de> 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 <me@mutt.org> 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 <roessler@does-not-exist.org> for Mutt 0.89i:
- *
- * The PGP code was using unsigned hexadecimal formats. Unfortunately,
- * unsigned formats simply didn't work.
- *
- * 1997-10-22 Brandon Long <blong@fiction.net> 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 <blong@fiction.net> 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 WIN32
-#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 0
-#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) */
-
-/* WinCE5.0 does not have uintptr_t defined */
-#if (_WIN32_WCE < 600)
-#ifdef UINTPTR_T
-#undef UINTPTR_T
-#endif
-#define UINTPTR_T unsigned long int
-#endif
-
-
-/* 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.
- */
-#if defined(PIPE_SUBSYSTEM_WINDOWS_MINIPORT)
- mask = (unsigned long)mypow10(precision);
-#else
- mask = (UINTMAX_T)mypow10(precision);
-#endif
- /*
- * 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;
-
-#if defined(PIPE_SUBSYSTEM_WINDOWS_MINIPORT)
- result = (unsigned long)value;
-#else
- result = (UINTMAX_T)value;
-#endif
- /*
- * 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: */
+/*
+ * Copyright (c) 1995 Patrick Powell.
+ *
+ * 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.
+ */
+
+/*
+ * Copyright (c) 2008 Holger Weiss.
+ *
+ * This version of the code is maintained by Holger Weiss <holger@jhweiss.de>.
+ * 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 <holger@jhweiss.de> 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 <holger@jhweiss.de> for C99-snprintf 1.0:
+ *
+ * Added a lot of new features, fixed many bugs, and incorporated various
+ * improvements done by Andrew Tridgell <tridge@samba.org>, Russ Allbery
+ * <rra@stanford.edu>, Hrvoje Niksic <hniksic@xemacs.org>, Damien Miller
+ * <djm@mindrot.org>, 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 <holger@jhweiss.de> 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 <me@mutt.org> 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 <roessler@does-not-exist.org> for Mutt 0.89i:
+ *
+ * The PGP code was using unsigned hexadecimal formats. Unfortunately,
+ * unsigned formats simply didn't work.
+ *
+ * 1997-10-22 Brandon Long <blong@fiction.net> 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 <blong@fiction.net> 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 WIN32
+#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 0
+#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) */
+
+/* WinCE5.0 does not have uintptr_t defined */
+#if (_WIN32_WCE < 600)
+#ifdef UINTPTR_T
+#undef UINTPTR_T
+#endif
+#define UINTPTR_T unsigned long int
+#endif
+
+
+/* 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: */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 14:00:42 +0000