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author | Thanasis Antoniou | 2019-11-12 20:01:43 +0200 |
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committer | Thanasis Antoniou | 2019-11-12 20:01:43 +0200 |
commit | 3e9504856f9b4f07b2befa0845fe500fbdfba9f9 (patch) | |
tree | bf9bf01aff8b91c9d88d2173cb6333d288f1ed29 /backends/platform/android/snprintf.cpp | |
parent | fe296f1c4737ecdb28b96ed98e07ce602ecae699 (diff) | |
download | scummvm-rg350-3e9504856f9b4f07b2befa0845fe500fbdfba9f9.tar.gz scummvm-rg350-3e9504856f9b4f07b2befa0845fe500fbdfba9f9.tar.bz2 scummvm-rg350-3e9504856f9b4f07b2befa0845fe500fbdfba9f9.zip |
ANDROID: Override UTF-8 compliant definition of vsn_printf
This sets Android as a non-standard port in configure in order to override the definition for vsn_printf
The vsn_printf implementation is taken from https://github.com/weiss/c99-snprintf
Diffstat (limited to 'backends/platform/android/snprintf.cpp')
-rw-r--r-- | backends/platform/android/snprintf.cpp | 1323 |
1 files changed, 1323 insertions, 0 deletions
diff --git a/backends/platform/android/snprintf.cpp b/backends/platform/android/snprintf.cpp new file mode 100644 index 0000000000..c0b241c9d6 --- /dev/null +++ b/backends/platform/android/snprintf.cpp @@ -0,0 +1,1323 @@ +/* + * 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_FLOAT_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>. + */ +/* ScummVM - Graphic Adventure Engine + * + * ScummVM is the legal property of its developers, whose names + * are too numerous to list here. Please refer to the COPYRIGHT + * file distributed with this source distribution. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + */ + +#if defined(__ANDROID__) + +// Allow use of stuff in <time.h> +#define FORBIDDEN_SYMBOL_EXCEPTION_time_h + +// Disable printf override in common/forbidden.h to avoid +// clashes with log.h from the Android SDK. +// That header file uses +// __attribute__ ((format(printf, 3, 4))) +// which gets messed up by our override mechanism; this could +// be avoided by either changing the Android SDK to use the equally +// legal and valid +// __attribute__ ((format(printf, 3, 4))) +// or by refining our printf override to use a varadic macro +// (which then wouldn't be portable, though). +// Anyway, for now we just disable the printf override globally +// for the Android port +#define FORBIDDEN_SYMBOL_EXCEPTION_printf + +#include "backends/platform/android/portdefs.h" + +#include <errno.h> /* For ERANGE and errno. */ +#include <limits.h> /* For *_MAX. */ +#include <float.h> /* For *DBL_{MIN,MAX}_10_EXP. */ + +#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 +#define LDOUBLE_MIN_10_EXP LDBL_MIN_10_EXP +#define LDOUBLE_MAX_10_EXP LDBL_MAX_10_EXP +#else +#define LDOUBLE double +#define LDOUBLE_MIN_10_EXP DBL_MIN_10_EXP +#define LDOUBLE_MAX_10_EXP DBL_MAX_10_EXP +#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) */ + + +/* + * 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 < -1 || x > 1) && 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); + +//extern int errno; + +int rpl_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 'E': + if (ch == 'E') + flags |= PRINT_F_TYPE_E; + /* FALLTHROUGH */ + case 'G': + if (ch == 'G') + flags |= PRINT_F_TYPE_G; + /* FALLTHROUGH */ + case 'F': + flags |= PRINT_F_UP; + /* FALLTHROUGH */ + case 'a': + /* Not yet supported, we'll use "%f". */ + /* FALLTHROUGH */ + case 'e': + if (ch == 'e') + flags |= PRINT_F_TYPE_E; + /* FALLTHROUGH */ + case 'g': + if (ch == 'g') + flags |= PRINT_F_TYPE_G; + /* 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 'c': + cvalue = 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 = (const char *)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 = len; + break; + case PRINT_C_SHORT: + shortptr = va_arg(args, short int *); + *shortptr = len; + break; + case PRINT_C_LONG: + longptr = va_arg(args, long int *); + *longptr = len; + break; + case PRINT_C_LLONG: + llongptr = va_arg(args, LLONG *); + *llongptr = 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 = 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) { + errno = EOVERFLOW; + 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[5]; /* "e-300" (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) { + /* + * If the precision is zero, it is treated as one (cf. + * C99: 7.19.6.1, 8). + */ + if (precision == 0) + precision = 1; + /* + * 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 = 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 5. So, the + * econvert buffer can hold e.g. "e+999" and "e-999". We don't + * support an exponent which contains more than three digits. + * Therefore, the following stores are safe. + */ + epos = convert(exponent, econvert, 3, 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 LDOUBLE_MAX_10_EXP >= exponent >= LDOUBLE_MIN_10_EXP 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 >= LDOUBLE_MIN_10_EXP) + tmp *= 10; + while (tmp >= 10.0 && ++exponent <= LDOUBLE_MAX_10_EXP) + 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 = 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 // defined(__ANDROID__) +/* vim: set joinspaces noexpandtab textwidth=80 cinoptions=(4,u0: */ |