Start de-duplicating the regular and wide printf implementations.
This patch switches to C++ (in anticipation of needing it later), removes
a little duplication (via a macro for now), and ensures uniform support
for %C/%lc and %S/%ls between regular and wide (with new tests).
Since it's so hard to debug problems in printf (as the time I've wasted
already today will testify), that's all I want to do in this change. The
other 500 lines of diff can wait...
(Also merge "floatio.h" into "local.h" now all the users are in forked
code.)
Bug: http://b/67371539
Test: ran tests
Change-Id: I083353d89c32b9302d759ca6967cc6d8a62cd8a5
diff --git a/libc/stdio/vfprintf.cpp b/libc/stdio/vfprintf.cpp
new file mode 100644
index 0000000..6d16828
--- /dev/null
+++ b/libc/stdio/vfprintf.cpp
@@ -0,0 +1,1466 @@
+/* $OpenBSD: vfprintf.c,v 1.71 2016/01/04 15:47:47 schwarze Exp $ */
+/*-
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Chris Torek.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#define CHAR_TYPE char
+
+#include <sys/mman.h>
+#include <sys/types.h>
+
+#include <errno.h>
+#include <float.h>
+#include <langinfo.h>
+#include <limits.h>
+#include <locale.h>
+#include <math.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <wchar.h>
+
+#include "fvwrite.h"
+#include "gdtoa.h"
+#include "local.h"
+
+union arg {
+ int intarg;
+ unsigned int uintarg;
+ long longarg;
+ unsigned long ulongarg;
+ long long longlongarg;
+ unsigned long long ulonglongarg;
+ ptrdiff_t ptrdiffarg;
+ size_t sizearg;
+ ssize_t ssizearg;
+ intmax_t intmaxarg;
+ uintmax_t uintmaxarg;
+ void* pvoidarg;
+ char* pchararg;
+ signed char* pschararg;
+ short* pshortarg;
+ int* pintarg;
+ long* plongarg;
+ long long* plonglongarg;
+ ptrdiff_t* pptrdiffarg;
+ ssize_t* pssizearg;
+ intmax_t* pintmaxarg;
+ double doublearg;
+ long double longdoublearg;
+ wint_t wintarg;
+ wchar_t* pwchararg;
+};
+
+static int __find_arguments(const char* fmt0, va_list ap, union arg** argtable, size_t* argtablesiz);
+static int __grow_type_table(unsigned char** typetable, int* tablesize);
+
+/*
+ * Flush out all the vectors defined by the given uio,
+ * then reset it so that it can be reused.
+ */
+static int __sprint(FILE* fp, struct __suio* uio) {
+ int err;
+
+ if (uio->uio_resid == 0) {
+ uio->uio_iovcnt = 0;
+ return (0);
+ }
+ err = __sfvwrite(fp, uio);
+ uio->uio_resid = 0;
+ uio->uio_iovcnt = 0;
+ return (err);
+}
+
+/*
+ * Helper function for `fprintf to unbuffered unix file': creates a
+ * temporary buffer. We only work on write-only files; this avoids
+ * worries about ungetc buffers and so forth.
+ */
+static int __sbprintf(FILE* fp, const char* fmt, va_list ap) {
+ int ret;
+ FILE fake;
+ struct __sfileext fakeext;
+ unsigned char buf[BUFSIZ];
+
+ _FILEEXT_SETUP(&fake, &fakeext);
+ /* copy the important variables */
+ fake._flags = fp->_flags & ~__SNBF;
+ fake._file = fp->_file;
+ fake._cookie = fp->_cookie;
+ fake._write = fp->_write;
+
+ /* set up the buffer */
+ fake._bf._base = fake._p = buf;
+ fake._bf._size = fake._w = sizeof(buf);
+ fake._lbfsize = 0; /* not actually used, but Just In Case */
+
+ /* do the work, then copy any error status */
+ ret = __vfprintf(&fake, fmt, ap);
+ if (ret >= 0 && __sflush(&fake)) ret = EOF;
+ if (fake._flags & __SERR) fp->_flags |= __SERR;
+ return (ret);
+}
+
+/*
+ * Convert a wide character string argument for the %ls format to a multibyte
+ * string representation. If not -1, prec specifies the maximum number of
+ * bytes to output, and also means that we can't assume that the wide char
+ * string is null-terminated.
+ */
+static char* __wcsconv(wchar_t* wcsarg, int prec) {
+ mbstate_t mbs;
+ char buf[MB_LEN_MAX];
+ wchar_t* p;
+ char* convbuf;
+ size_t clen, nbytes;
+
+ /* Allocate space for the maximum number of bytes we could output. */
+ if (prec < 0) {
+ memset(&mbs, 0, sizeof(mbs));
+ p = wcsarg;
+ nbytes = wcsrtombs(NULL, (const wchar_t**)&p, 0, &mbs);
+ if (nbytes == (size_t)-1) return (NULL);
+ } else {
+ /*
+ * Optimisation: if the output precision is small enough,
+ * just allocate enough memory for the maximum instead of
+ * scanning the string.
+ */
+ if (prec < 128)
+ nbytes = prec;
+ else {
+ nbytes = 0;
+ p = wcsarg;
+ memset(&mbs, 0, sizeof(mbs));
+ for (;;) {
+ clen = wcrtomb(buf, *p++, &mbs);
+ if (clen == 0 || clen == (size_t)-1 || nbytes + clen > (size_t)prec) break;
+ nbytes += clen;
+ }
+ if (clen == (size_t)-1) return (NULL);
+ }
+ }
+ if ((convbuf = static_cast<char*>(malloc(nbytes + 1))) == NULL) return NULL;
+
+ /* Fill the output buffer. */
+ p = wcsarg;
+ memset(&mbs, 0, sizeof(mbs));
+ if ((nbytes = wcsrtombs(convbuf, (const wchar_t**)&p, nbytes, &mbs)) == (size_t)-1) {
+ free(convbuf);
+ return (NULL);
+ }
+ convbuf[nbytes] = '\0';
+ return (convbuf);
+}
+
+#define DEFPREC 6
+
+#define to_digit(c) ((c) - '0')
+#define is_digit(c) ((unsigned)to_digit(c) <= 9)
+#define to_char(n) ((CHAR_TYPE)((n) + '0'))
+
+template <typename CharT>
+static int exponent(CharT* p0, int exp, int fmtch) {
+ CharT* p = p0;
+ *p++ = fmtch;
+ if (exp < 0) {
+ exp = -exp;
+ *p++ = '-';
+ } else {
+ *p++ = '+';
+ }
+
+ CharT expbuf[MAXEXPDIG];
+ CharT* t = expbuf + MAXEXPDIG;
+ if (exp > 9) {
+ do {
+ *--t = to_char(exp % 10);
+ } while ((exp /= 10) > 9);
+ *--t = to_char(exp);
+ for (; t < expbuf + MAXEXPDIG; *p++ = *t++) /* nothing */;
+ } else {
+ /*
+ * Exponents for decimal floating point conversions
+ * (%[eEgG]) must be at least two characters long,
+ * whereas exponents for hexadecimal conversions can
+ * be only one character long.
+ */
+ if (fmtch == 'e' || fmtch == 'E') *p++ = '0';
+ *p++ = to_char(exp);
+ }
+ return (p - p0);
+}
+
+/*
+ * The size of the buffer we use as scratch space for integer
+ * conversions, among other things. Technically, we would need the
+ * most space for base 10 conversions with thousands' grouping
+ * characters between each pair of digits. 100 bytes is a
+ * conservative overestimate even for a 128-bit uintmax_t.
+ */
+#define BUF 100
+
+#define STATIC_ARG_TBL_SIZE 8 /* Size of static argument table. */
+
+/*
+ * Flags used during conversion.
+ */
+#define ALT 0x0001 /* alternate form */
+#define LADJUST 0x0004 /* left adjustment */
+#define LONGDBL 0x0008 /* long double */
+#define LONGINT 0x0010 /* long integer */
+#define LLONGINT 0x0020 /* long long integer */
+#define SHORTINT 0x0040 /* short integer */
+#define ZEROPAD 0x0080 /* zero (as opposed to blank) pad */
+#define FPT 0x0100 /* Floating point number */
+#define PTRINT 0x0200 /* (unsigned) ptrdiff_t */
+#define SIZEINT 0x0400 /* (signed) size_t */
+#define CHARINT 0x0800 /* 8 bit integer */
+#define MAXINT 0x1000 /* largest integer size (intmax_t) */
+
+int vfprintf(FILE* fp, const char* fmt0, __va_list ap) {
+ int ret;
+
+ FLOCKFILE(fp);
+ ret = __vfprintf(fp, fmt0, ap);
+ FUNLOCKFILE(fp);
+ return (ret);
+}
+DEF_STRONG(vfprintf);
+
+int __vfprintf(FILE* fp, const char* fmt0, __va_list ap) {
+ char* fmt; /* format string */
+ int ch; /* character from fmt */
+ int n, n2; /* handy integers (short term usage) */
+ char* cp; /* handy char pointer (short term usage) */
+ struct __siov* iovp; /* for PRINT macro */
+ int flags; /* flags as above */
+ int ret; /* return value accumulator */
+ int width; /* width from format (%8d), or 0 */
+ int prec; /* precision from format; <0 for N/A */
+ char sign; /* sign prefix (' ', '+', '-', or \0) */
+ wchar_t wc;
+ mbstate_t ps;
+ /*
+ * We can decompose the printed representation of floating
+ * point numbers into several parts, some of which may be empty:
+ *
+ * [+|-| ] [0x|0X] MMM . NNN [e|E|p|P] [+|-] ZZ
+ * A B ---C--- D E F
+ *
+ * A: 'sign' holds this value if present; '\0' otherwise
+ * B: ox[1] holds the 'x' or 'X'; '\0' if not hexadecimal
+ * C: cp points to the string MMMNNN. Leading and trailing
+ * zeros are not in the string and must be added.
+ * D: expchar holds this character; '\0' if no exponent, e.g. %f
+ * F: at least two digits for decimal, at least one digit for hex
+ */
+ char* decimal_point = NULL;
+ int signflag; /* true if float is negative */
+ union { /* floating point arguments %[aAeEfFgG] */
+ double dbl;
+ long double ldbl;
+ } fparg;
+ int expt; /* integer value of exponent */
+ char expchar; /* exponent character: [eEpP\0] */
+ char* dtoaend; /* pointer to end of converted digits */
+ int expsize; /* character count for expstr */
+ int lead; /* sig figs before decimal or group sep */
+ int ndig; /* actual number of digits returned by dtoa */
+ char expstr[MAXEXPDIG + 2]; /* buffer for exponent string: e+ZZZ */
+ char* dtoaresult = NULL;
+
+ uintmax_t _umax; /* integer arguments %[diouxX] */
+ enum { OCT, DEC, HEX } base; /* base for %[diouxX] conversion */
+ int dprec; /* a copy of prec if %[diouxX], 0 otherwise */
+ int realsz; /* field size expanded by dprec */
+ int size; /* size of converted field or string */
+ const char* xdigs; /* digits for %[xX] conversion */
+#define NIOV 8
+ struct __suio uio; /* output information: summary */
+ struct __siov iov[NIOV]; /* ... and individual io vectors */
+ char buf[BUF]; /* buffer with space for digits of uintmax_t */
+ char ox[2]; /* space for 0x; ox[1] is either x, X, or \0 */
+ union arg* argtable; /* args, built due to positional arg */
+ union arg statargtable[STATIC_ARG_TBL_SIZE];
+ size_t argtablesiz;
+ int nextarg; /* 1-based argument index */
+ va_list orgap; /* original argument pointer */
+ char* convbuf; /* buffer for wide to multi-byte conversion */
+
+ /*
+ * Choose PADSIZE to trade efficiency vs. size. If larger printf
+ * fields occur frequently, increase PADSIZE and make the initialisers
+ * below longer.
+ */
+#define PADSIZE 16 /* pad chunk size */
+ static char blanks[PADSIZE] = { ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
+ ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ' };
+ static char zeroes[PADSIZE] = { '0', '0', '0', '0', '0', '0', '0', '0',
+ '0', '0', '0', '0', '0', '0', '0', '0' };
+
+ static const char xdigs_lower[] = "0123456789abcdef";
+ static const char xdigs_upper[] = "0123456789ABCDEF";
+
+ /*
+ * BEWARE, these `goto error' on error, and PAD uses `n'.
+ */
+#define PRINT(ptr, len) \
+ do { \
+ iovp->iov_base = (ptr); \
+ iovp->iov_len = (len); \
+ uio.uio_resid += (len); \
+ iovp++; \
+ if (++uio.uio_iovcnt >= NIOV) { \
+ if (__sprint(fp, &uio)) goto error; \
+ iovp = iov; \
+ } \
+ } while (0)
+#define PAD(howmany, with) \
+ do { \
+ if ((n = (howmany)) > 0) { \
+ while (n > PADSIZE) { \
+ PRINT(with, PADSIZE); \
+ n -= PADSIZE; \
+ } \
+ PRINT(with, n); \
+ } \
+ } while (0)
+#define PRINTANDPAD(p, ep, len, with) \
+ do { \
+ n2 = (ep) - (p); \
+ if (n2 > (len)) n2 = (len); \
+ if (n2 > 0) PRINT((p), n2); \
+ PAD((len) - (n2 > 0 ? n2 : 0), (with)); \
+ } while (0)
+#define FLUSH() \
+ do { \
+ if (uio.uio_resid && __sprint(fp, &uio)) goto error; \
+ uio.uio_iovcnt = 0; \
+ iovp = iov; \
+ } while (0)
+
+ /*
+ * To extend shorts properly, we need both signed and unsigned
+ * argument extraction methods.
+ */
+#define SARG() \
+ ((intmax_t)(flags & MAXINT \
+ ? GETARG(intmax_t) \
+ : flags & LLONGINT \
+ ? GETARG(long long) \
+ : flags & LONGINT \
+ ? GETARG(long) \
+ : flags & PTRINT \
+ ? GETARG(ptrdiff_t) \
+ : flags & SIZEINT \
+ ? GETARG(ssize_t) \
+ : flags & SHORTINT \
+ ? (short)GETARG(int) \
+ : flags & CHARINT ? (signed char)GETARG(int) \
+ : GETARG(int)))
+#define UARG() \
+ ((uintmax_t)(flags & MAXINT \
+ ? GETARG(uintmax_t) \
+ : flags & LLONGINT \
+ ? GETARG(unsigned long long) \
+ : flags & LONGINT \
+ ? GETARG(unsigned long) \
+ : flags & PTRINT ? (uintptr_t)GETARG(ptrdiff_t) : /* XXX */ \
+ flags & SIZEINT \
+ ? GETARG(size_t) \
+ : flags & SHORTINT \
+ ? (unsigned short)GETARG(int) \
+ : flags & CHARINT ? (unsigned char)GETARG(int) \
+ : GETARG(unsigned int)))
+
+ /*
+ * Append a digit to a value and check for overflow.
+ */
+#define APPEND_DIGIT(val, dig) \
+ do { \
+ if ((val) > INT_MAX / 10) goto overflow; \
+ (val) *= 10; \
+ if ((val) > INT_MAX - to_digit((dig))) goto overflow; \
+ (val) += to_digit((dig)); \
+ } while (0)
+
+ /*
+ * Get * arguments, including the form *nn$. Preserve the nextarg
+ * that the argument can be gotten once the type is determined.
+ */
+#define GETASTER(val) \
+ n2 = 0; \
+ cp = fmt; \
+ while (is_digit(*cp)) { \
+ APPEND_DIGIT(n2, *cp); \
+ cp++; \
+ } \
+ if (*cp == '$') { \
+ int hold = nextarg; \
+ if (argtable == NULL) { \
+ argtable = statargtable; \
+ if (__find_arguments(fmt0, orgap, &argtable, &argtablesiz) == -1) { \
+ ret = -1; \
+ goto error; \
+ } \
+ } \
+ nextarg = n2; \
+ val = GETARG(int); \
+ nextarg = hold; \
+ fmt = ++cp; \
+ } else { \
+ val = GETARG(int); \
+ }
+
+/*
+ * Get the argument indexed by nextarg. If the argument table is
+ * built, use it to get the argument. If its not, get the next
+ * argument (and arguments must be gotten sequentially).
+ */
+#define GETARG(type) \
+ ((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : (nextarg++, va_arg(ap, type)))
+
+ _SET_ORIENTATION(fp, -1);
+ /* sorry, fprintf(read_only_file, "") returns EOF, not 0 */
+ if (cantwrite(fp)) {
+ errno = EBADF;
+ return (EOF);
+ }
+
+ /* optimise fprintf(stderr) (and other unbuffered Unix files) */
+ if ((fp->_flags & (__SNBF | __SWR | __SRW)) == (__SNBF | __SWR) && fp->_file >= 0)
+ return (__sbprintf(fp, fmt0, ap));
+
+ fmt = (char*)fmt0;
+ argtable = NULL;
+ nextarg = 1;
+ va_copy(orgap, ap);
+ uio.uio_iov = iovp = iov;
+ uio.uio_resid = 0;
+ uio.uio_iovcnt = 0;
+ ret = 0;
+ convbuf = NULL;
+
+ memset(&ps, 0, sizeof(ps));
+ /*
+ * Scan the format for conversions (`%' character).
+ */
+ for (;;) {
+ cp = fmt;
+ while ((n = mbrtowc(&wc, fmt, MB_CUR_MAX, &ps)) > 0) {
+ fmt += n;
+ if (wc == '%') {
+ fmt--;
+ break;
+ }
+ }
+ if (n < 0) {
+ ret = -1;
+ goto error;
+ }
+ if (fmt != cp) {
+ ptrdiff_t m = fmt - cp;
+ if (m < 0 || m > INT_MAX - ret) goto overflow;
+ PRINT(cp, m);
+ ret += m;
+ }
+ if (n == 0) goto done;
+ fmt++; /* skip over '%' */
+
+ flags = 0;
+ dprec = 0;
+ width = 0;
+ prec = -1;
+ sign = '\0';
+ ox[1] = '\0';
+
+ rflag:
+ ch = *fmt++;
+ reswitch:
+ switch (ch) {
+ case ' ':
+ /*
+ * ``If the space and + flags both appear, the space
+ * flag will be ignored.''
+ * -- ANSI X3J11
+ */
+ if (!sign) sign = ' ';
+ goto rflag;
+ case '#':
+ flags |= ALT;
+ goto rflag;
+ case '\'':
+ /* grouping not implemented */
+ goto rflag;
+ case '*':
+ /*
+ * ``A negative field width argument is taken as a
+ * - flag followed by a positive field width.''
+ * -- ANSI X3J11
+ * They don't exclude field widths read from args.
+ */
+ GETASTER(width);
+ if (width >= 0) goto rflag;
+ if (width == INT_MIN) goto overflow;
+ width = -width;
+ /* FALLTHROUGH */
+ case '-':
+ flags |= LADJUST;
+ goto rflag;
+ case '+':
+ sign = '+';
+ goto rflag;
+ case '.':
+ if ((ch = *fmt++) == '*') {
+ GETASTER(n);
+ prec = n < 0 ? -1 : n;
+ goto rflag;
+ }
+ n = 0;
+ while (is_digit(ch)) {
+ APPEND_DIGIT(n, ch);
+ ch = *fmt++;
+ }
+ if (ch == '$') {
+ nextarg = n;
+ if (argtable == NULL) {
+ argtable = statargtable;
+ if (__find_arguments(fmt0, orgap, &argtable, &argtablesiz) == -1) {
+ ret = -1;
+ goto error;
+ }
+ }
+ goto rflag;
+ }
+ prec = n;
+ goto reswitch;
+ case '0':
+ /*
+ * ``Note that 0 is taken as a flag, not as the
+ * beginning of a field width.''
+ * -- ANSI X3J11
+ */
+ flags |= ZEROPAD;
+ goto rflag;
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ n = 0;
+ do {
+ APPEND_DIGIT(n, ch);
+ ch = *fmt++;
+ } while (is_digit(ch));
+ if (ch == '$') {
+ nextarg = n;
+ if (argtable == NULL) {
+ argtable = statargtable;
+ if (__find_arguments(fmt0, orgap, &argtable, &argtablesiz) == -1) {
+ ret = -1;
+ goto error;
+ }
+ }
+ goto rflag;
+ }
+ width = n;
+ goto reswitch;
+ case 'L':
+ flags |= LONGDBL;
+ goto rflag;
+ case 'h':
+ if (*fmt == 'h') {
+ fmt++;
+ flags |= CHARINT;
+ } else {
+ flags |= SHORTINT;
+ }
+ goto rflag;
+ case 'j':
+ flags |= MAXINT;
+ goto rflag;
+ case 'l':
+ if (*fmt == 'l') {
+ fmt++;
+ flags |= LLONGINT;
+ } else {
+ flags |= LONGINT;
+ }
+ goto rflag;
+ case 'q':
+ flags |= LLONGINT;
+ goto rflag;
+ case 't':
+ flags |= PTRINT;
+ goto rflag;
+ case 'z':
+ flags |= SIZEINT;
+ goto rflag;
+ case 'C':
+ flags |= LONGINT;
+ /*FALLTHROUGH*/
+ case 'c':
+ if (flags & LONGINT) {
+ mbstate_t mbs;
+ size_t mbseqlen;
+
+ memset(&mbs, 0, sizeof(mbs));
+ mbseqlen = wcrtomb(buf, (wchar_t)GETARG(wint_t), &mbs);
+ if (mbseqlen == (size_t)-1) {
+ ret = -1;
+ goto error;
+ }
+ cp = buf;
+ size = (int)mbseqlen;
+ } else {
+ *(cp = buf) = GETARG(int);
+ size = 1;
+ }
+ sign = '\0';
+ break;
+ case 'D':
+ flags |= LONGINT;
+ /*FALLTHROUGH*/
+ case 'd':
+ case 'i':
+ _umax = SARG();
+ if ((intmax_t)_umax < 0) {
+ _umax = -_umax;
+ sign = '-';
+ }
+ base = DEC;
+ goto number;
+ case 'a':
+ case 'A':
+ if (ch == 'a') {
+ ox[1] = 'x';
+ xdigs = xdigs_lower;
+ expchar = 'p';
+ } else {
+ ox[1] = 'X';
+ xdigs = xdigs_upper;
+ expchar = 'P';
+ }
+ if (prec >= 0) prec++;
+ if (dtoaresult) __freedtoa(dtoaresult);
+ if (flags & LONGDBL) {
+ fparg.ldbl = GETARG(long double);
+ dtoaresult = cp = __hldtoa(fparg.ldbl, xdigs, prec, &expt, &signflag, &dtoaend);
+ if (dtoaresult == NULL) {
+ errno = ENOMEM;
+ goto error;
+ }
+ } else {
+ fparg.dbl = GETARG(double);
+ dtoaresult = cp = __hdtoa(fparg.dbl, xdigs, prec, &expt, &signflag, &dtoaend);
+ if (dtoaresult == NULL) {
+ errno = ENOMEM;
+ goto error;
+ }
+ }
+ if (prec < 0) prec = dtoaend - cp;
+ if (expt == INT_MAX) ox[1] = '\0';
+ goto fp_common;
+ case 'e':
+ case 'E':
+ expchar = ch;
+ if (prec < 0) /* account for digit before decpt */
+ prec = DEFPREC + 1;
+ else
+ prec++;
+ goto fp_begin;
+ case 'f':
+ case 'F':
+ expchar = '\0';
+ goto fp_begin;
+ case 'g':
+ case 'G':
+ expchar = ch - ('g' - 'e');
+ if (prec == 0) prec = 1;
+ fp_begin:
+ if (prec < 0) prec = DEFPREC;
+ if (dtoaresult) __freedtoa(dtoaresult);
+ if (flags & LONGDBL) {
+ fparg.ldbl = GETARG(long double);
+ dtoaresult = cp = __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec, &expt, &signflag, &dtoaend);
+ if (dtoaresult == NULL) {
+ errno = ENOMEM;
+ goto error;
+ }
+ } else {
+ fparg.dbl = GETARG(double);
+ dtoaresult = cp = __dtoa(fparg.dbl, expchar ? 2 : 3, prec, &expt, &signflag, &dtoaend);
+ if (dtoaresult == NULL) {
+ errno = ENOMEM;
+ goto error;
+ }
+ if (expt == 9999) expt = INT_MAX;
+ }
+ fp_common:
+ if (signflag) sign = '-';
+ if (expt == INT_MAX) { /* inf or nan */
+ if (*cp == 'N') {
+ cp = const_cast<char*>((ch >= 'a') ? "nan" : "NAN");
+ } else {
+ cp = const_cast<char*>((ch >= 'a') ? "inf" : "INF");
+ }
+ size = 3;
+ flags &= ~ZEROPAD;
+ break;
+ }
+ flags |= FPT;
+ ndig = dtoaend - cp;
+ if (ch == 'g' || ch == 'G') {
+ if (expt > -4 && expt <= prec) {
+ /* Make %[gG] smell like %[fF] */
+ expchar = '\0';
+ if (flags & ALT)
+ prec -= expt;
+ else
+ prec = ndig - expt;
+ if (prec < 0) prec = 0;
+ } else {
+ /*
+ * Make %[gG] smell like %[eE], but
+ * trim trailing zeroes if no # flag.
+ */
+ if (!(flags & ALT)) prec = ndig;
+ }
+ }
+ if (expchar) {
+ expsize = exponent(expstr, expt - 1, expchar);
+ size = expsize + prec;
+ if (prec > 1 || flags & ALT) ++size;
+ } else {
+ /* space for digits before decimal point */
+ if (expt > 0)
+ size = expt;
+ else /* "0" */
+ size = 1;
+ /* space for decimal pt and following digits */
+ if (prec || flags & ALT) size += prec + 1;
+ lead = expt;
+ }
+ break;
+#ifndef NO_PRINTF_PERCENT_N
+ case 'n':
+ if (flags & LLONGINT)
+ *GETARG(long long*) = ret;
+ else if (flags & LONGINT)
+ *GETARG(long*) = ret;
+ else if (flags & SHORTINT)
+ *GETARG(short*) = ret;
+ else if (flags & CHARINT)
+ *GETARG(signed char*) = ret;
+ else if (flags & PTRINT)
+ *GETARG(ptrdiff_t*) = ret;
+ else if (flags & SIZEINT)
+ *GETARG(ssize_t*) = ret;
+ else if (flags & MAXINT)
+ *GETARG(intmax_t*) = ret;
+ else
+ *GETARG(int*) = ret;
+ continue; /* no output */
+#endif /* NO_PRINTF_PERCENT_N */
+ case 'O':
+ flags |= LONGINT;
+ /*FALLTHROUGH*/
+ case 'o':
+ _umax = UARG();
+ base = OCT;
+ goto nosign;
+ case 'p':
+ /*
+ * ``The argument shall be a pointer to void. The
+ * value of the pointer is converted to a sequence
+ * of printable characters, in an implementation-
+ * defined manner.''
+ * -- ANSI X3J11
+ */
+ _umax = (u_long)GETARG(void*);
+ base = HEX;
+ xdigs = xdigs_lower;
+ ox[1] = 'x';
+ goto nosign;
+ case 'S':
+ flags |= LONGINT;
+ /*FALLTHROUGH*/
+ case 's':
+ if (flags & LONGINT) {
+ wchar_t* wcp;
+
+ free(convbuf);
+ convbuf = NULL;
+ if ((wcp = GETARG(wchar_t*)) == NULL) {
+ cp = const_cast<char*>("(null)");
+ } else {
+ convbuf = __wcsconv(wcp, prec);
+ if (convbuf == NULL) {
+ ret = -1;
+ goto error;
+ }
+ cp = convbuf;
+ }
+ } else if ((cp = GETARG(char*)) == NULL) {
+ cp = const_cast<char*>("(null)");
+ }
+ if (prec >= 0) {
+ size = strnlen(cp, prec);
+ } else {
+ size_t len;
+
+ if ((len = strlen(cp)) > INT_MAX) goto overflow;
+ size = (int)len;
+ }
+ sign = '\0';
+ break;
+ case 'U':
+ flags |= LONGINT;
+ /*FALLTHROUGH*/
+ case 'u':
+ _umax = UARG();
+ base = DEC;
+ goto nosign;
+ case 'X':
+ xdigs = xdigs_upper;
+ goto hex;
+ case 'x':
+ xdigs = xdigs_lower;
+ hex:
+ _umax = UARG();
+ base = HEX;
+ /* leading 0x/X only if non-zero */
+ if (flags & ALT && _umax != 0) ox[1] = ch;
+
+ /* unsigned conversions */
+ nosign:
+ sign = '\0';
+ /*
+ * ``... diouXx conversions ... if a precision is
+ * specified, the 0 flag will be ignored.''
+ * -- ANSI X3J11
+ */
+ number:
+ if ((dprec = prec) >= 0) flags &= ~ZEROPAD;
+
+ /*
+ * ``The result of converting a zero value with an
+ * explicit precision of zero is no characters.''
+ * -- ANSI X3J11
+ */
+ cp = buf + BUF;
+ if (_umax != 0 || prec != 0) {
+ /*
+ * Unsigned mod is hard, and unsigned mod
+ * by a constant is easier than that by
+ * a variable; hence this switch.
+ */
+ switch (base) {
+ case OCT:
+ do {
+ *--cp = to_char(_umax & 7);
+ _umax >>= 3;
+ } while (_umax);
+ /* handle octal leading 0 */
+ if (flags & ALT && *cp != '0') *--cp = '0';
+ break;
+
+ case DEC:
+ /* many numbers are 1 digit */
+ while (_umax >= 10) {
+ *--cp = to_char(_umax % 10);
+ _umax /= 10;
+ }
+ *--cp = to_char(_umax);
+ break;
+
+ case HEX:
+ do {
+ *--cp = xdigs[_umax & 15];
+ _umax >>= 4;
+ } while (_umax);
+ break;
+
+ default:
+ abort();
+ }
+ }
+ size = buf + BUF - cp;
+ if (size > BUF) abort(); /* should never happen */
+ break;
+ default: /* "%?" prints ?, unless ? is NUL */
+ if (ch == '\0') goto done;
+ /* pretend it was %c with argument ch */
+ cp = buf;
+ *cp = ch;
+ size = 1;
+ sign = '\0';
+ break;
+ }
+
+ /*
+ * All reasonable formats wind up here. At this point, `cp'
+ * points to a string which (if not flags&LADJUST) should be
+ * padded out to `width' places. If flags&ZEROPAD, it should
+ * first be prefixed by any sign or other prefix; otherwise,
+ * it should be blank padded before the prefix is emitted.
+ * After any left-hand padding and prefixing, emit zeroes
+ * required by a decimal %[diouxX] precision, then print the
+ * string proper, then emit zeroes required by any leftover
+ * floating precision; finally, if LADJUST, pad with blanks.
+ *
+ * Compute actual size, so we know how much to pad.
+ * size excludes decimal prec; realsz includes it.
+ */
+ realsz = dprec > size ? dprec : size;
+ if (sign) realsz++;
+ if (ox[1]) realsz += 2;
+
+ /* right-adjusting blank padding */
+ if ((flags & (LADJUST | ZEROPAD)) == 0) PAD(width - realsz, blanks);
+
+ /* prefix */
+ if (sign) PRINT(&sign, 1);
+ if (ox[1]) { /* ox[1] is either x, X, or \0 */
+ ox[0] = '0';
+ PRINT(ox, 2);
+ }
+
+ /* right-adjusting zero padding */
+ if ((flags & (LADJUST | ZEROPAD)) == ZEROPAD) PAD(width - realsz, zeroes);
+
+ /* leading zeroes from decimal precision */
+ PAD(dprec - size, zeroes);
+
+ /* the string or number proper */
+ if ((flags & FPT) == 0) {
+ PRINT(cp, size);
+ } else { /* glue together f_p fragments */
+ if (decimal_point == NULL) decimal_point = nl_langinfo(RADIXCHAR);
+ if (!expchar) { /* %[fF] or sufficiently short %[gG] */
+ if (expt <= 0) {
+ PRINT(zeroes, 1);
+ if (prec || flags & ALT) PRINT(decimal_point, 1);
+ PAD(-expt, zeroes);
+ /* already handled initial 0's */
+ prec += expt;
+ } else {
+ PRINTANDPAD(cp, dtoaend, lead, zeroes);
+ cp += lead;
+ if (prec || flags & ALT) PRINT(decimal_point, 1);
+ }
+ PRINTANDPAD(cp, dtoaend, prec, zeroes);
+ } else { /* %[eE] or sufficiently long %[gG] */
+ if (prec > 1 || flags & ALT) {
+ buf[0] = *cp++;
+ buf[1] = *decimal_point;
+ PRINT(buf, 2);
+ PRINT(cp, ndig - 1);
+ PAD(prec - ndig, zeroes);
+ } else { /* XeYYY */
+ PRINT(cp, 1);
+ }
+ PRINT(expstr, expsize);
+ }
+ }
+ /* left-adjusting padding (always blank) */
+ if (flags & LADJUST) PAD(width - realsz, blanks);
+
+ /* finally, adjust ret */
+ if (width < realsz) width = realsz;
+ if (width > INT_MAX - ret) goto overflow;
+ ret += width;
+
+ FLUSH(); /* copy out the I/O vectors */
+ }
+done:
+ FLUSH();
+error:
+ va_end(orgap);
+ if (__sferror(fp)) ret = -1;
+ goto finish;
+
+overflow:
+ errno = ENOMEM;
+ ret = -1;
+
+finish:
+ free(convbuf);
+ if (dtoaresult) __freedtoa(dtoaresult);
+ if (argtable != NULL && argtable != statargtable) {
+ munmap(argtable, argtablesiz);
+ argtable = NULL;
+ }
+ return (ret);
+}
+
+/*
+ * Type ids for argument type table.
+ */
+#define T_UNUSED 0
+#define T_SHORT 1
+#define T_U_SHORT 2
+#define TP_SHORT 3
+#define T_INT 4
+#define T_U_INT 5
+#define TP_INT 6
+#define T_LONG 7
+#define T_U_LONG 8
+#define TP_LONG 9
+#define T_LLONG 10
+#define T_U_LLONG 11
+#define TP_LLONG 12
+#define T_DOUBLE 13
+#define T_LONG_DOUBLE 14
+#define TP_CHAR 15
+#define TP_VOID 16
+#define T_PTRINT 17
+#define TP_PTRINT 18
+#define T_SIZEINT 19
+#define T_SSIZEINT 20
+#define TP_SSIZEINT 21
+#define T_MAXINT 22
+#define T_MAXUINT 23
+#define TP_MAXINT 24
+#define T_CHAR 25
+#define T_U_CHAR 26
+#define T_WINT 27
+#define TP_WCHAR 28
+
+/*
+ * Find all arguments when a positional parameter is encountered. Returns a
+ * table, indexed by argument number, of pointers to each arguments. The
+ * initial argument table should be an array of STATIC_ARG_TBL_SIZE entries.
+ * It will be replaced with a mmap-ed one if it overflows (malloc cannot be
+ * used since we are attempting to make snprintf thread safe, and alloca is
+ * problematic since we have nested functions..)
+ */
+static int __find_arguments(const char* fmt0, va_list ap, union arg** argtable,
+ size_t* argtablesiz) {
+ char* fmt; /* format string */
+ int ch; /* character from fmt */
+ int n, n2; /* handy integer (short term usage) */
+ char* cp; /* handy char pointer (short term usage) */
+ int flags; /* flags as above */
+ unsigned char* typetable; /* table of types */
+ unsigned char stattypetable[STATIC_ARG_TBL_SIZE];
+ int tablesize; /* current size of type table */
+ int tablemax; /* largest used index in table */
+ int nextarg; /* 1-based argument index */
+ int ret = 0; /* return value */
+ wchar_t wc;
+ mbstate_t ps;
+
+ /*
+ * Add an argument type to the table, expanding if necessary.
+ */
+#define ADDTYPE(type) \
+ ((nextarg >= tablesize) ? __grow_type_table(&typetable, &tablesize) : 0, \
+ (nextarg > tablemax) ? tablemax = nextarg : 0, typetable[nextarg++] = type)
+
+#define ADDSARG() \
+ ((flags & MAXINT) \
+ ? ADDTYPE(T_MAXINT) \
+ : ((flags & PTRINT) ? ADDTYPE(T_PTRINT) \
+ : ((flags & SIZEINT) \
+ ? ADDTYPE(T_SSIZEINT) \
+ : ((flags & LLONGINT) \
+ ? ADDTYPE(T_LLONG) \
+ : ((flags & LONGINT) \
+ ? ADDTYPE(T_LONG) \
+ : ((flags & SHORTINT) \
+ ? ADDTYPE(T_SHORT) \
+ : ((flags & CHARINT) ? ADDTYPE(T_CHAR) \
+ : ADDTYPE(T_INT))))))))
+
+#define ADDUARG() \
+ ((flags & MAXINT) \
+ ? ADDTYPE(T_MAXUINT) \
+ : ((flags & PTRINT) \
+ ? ADDTYPE(T_PTRINT) \
+ : ((flags & SIZEINT) \
+ ? ADDTYPE(T_SIZEINT) \
+ : ((flags & LLONGINT) \
+ ? ADDTYPE(T_U_LLONG) \
+ : ((flags & LONGINT) \
+ ? ADDTYPE(T_U_LONG) \
+ : ((flags & SHORTINT) \
+ ? ADDTYPE(T_U_SHORT) \
+ : ((flags & CHARINT) ? ADDTYPE(T_U_CHAR) \
+ : ADDTYPE(T_U_INT))))))))
+
+ /*
+ * Add * arguments to the type array.
+ */
+#define ADDASTER() \
+ n2 = 0; \
+ cp = fmt; \
+ while (is_digit(*cp)) { \
+ APPEND_DIGIT(n2, *cp); \
+ cp++; \
+ } \
+ if (*cp == '$') { \
+ int hold = nextarg; \
+ nextarg = n2; \
+ ADDTYPE(T_INT); \
+ nextarg = hold; \
+ fmt = ++cp; \
+ } else { \
+ ADDTYPE(T_INT); \
+ }
+ fmt = (char*)fmt0;
+ typetable = stattypetable;
+ tablesize = STATIC_ARG_TBL_SIZE;
+ tablemax = 0;
+ nextarg = 1;
+ memset(typetable, T_UNUSED, STATIC_ARG_TBL_SIZE);
+ memset(&ps, 0, sizeof(ps));
+
+ /*
+ * Scan the format for conversions (`%' character).
+ */
+ for (;;) {
+ cp = fmt;
+ while ((n = mbrtowc(&wc, fmt, MB_CUR_MAX, &ps)) > 0) {
+ fmt += n;
+ if (wc == '%') {
+ fmt--;
+ break;
+ }
+ }
+ if (n < 0) return (-1);
+ if (n == 0) goto done;
+ fmt++; /* skip over '%' */
+
+ flags = 0;
+
+ rflag:
+ ch = *fmt++;
+ reswitch:
+ switch (ch) {
+ case ' ':
+ case '#':
+ case '\'':
+ goto rflag;
+ case '*':
+ ADDASTER();
+ goto rflag;
+ case '-':
+ case '+':
+ goto rflag;
+ case '.':
+ if ((ch = *fmt++) == '*') {
+ ADDASTER();
+ goto rflag;
+ }
+ while (is_digit(ch)) {
+ ch = *fmt++;
+ }
+ goto reswitch;
+ case '0':
+ goto rflag;
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ n = 0;
+ do {
+ APPEND_DIGIT(n, ch);
+ ch = *fmt++;
+ } while (is_digit(ch));
+ if (ch == '$') {
+ nextarg = n;
+ goto rflag;
+ }
+ goto reswitch;
+ case 'L':
+ flags |= LONGDBL;
+ goto rflag;
+ case 'h':
+ if (*fmt == 'h') {
+ fmt++;
+ flags |= CHARINT;
+ } else {
+ flags |= SHORTINT;
+ }
+ goto rflag;
+ case 'j':
+ flags |= MAXINT;
+ goto rflag;
+ case 'l':
+ if (*fmt == 'l') {
+ fmt++;
+ flags |= LLONGINT;
+ } else {
+ flags |= LONGINT;
+ }
+ goto rflag;
+ case 'q':
+ flags |= LLONGINT;
+ goto rflag;
+ case 't':
+ flags |= PTRINT;
+ goto rflag;
+ case 'z':
+ flags |= SIZEINT;
+ goto rflag;
+ case 'C':
+ flags |= LONGINT;
+ /*FALLTHROUGH*/
+ case 'c':
+ if (flags & LONGINT)
+ ADDTYPE(T_WINT);
+ else
+ ADDTYPE(T_INT);
+ break;
+ case 'D':
+ flags |= LONGINT;
+ /*FALLTHROUGH*/
+ case 'd':
+ case 'i':
+ ADDSARG();
+ break;
+ case 'a':
+ case 'A':
+ case 'e':
+ case 'E':
+ case 'f':
+ case 'F':
+ case 'g':
+ case 'G':
+ if (flags & LONGDBL)
+ ADDTYPE(T_LONG_DOUBLE);
+ else
+ ADDTYPE(T_DOUBLE);
+ break;
+#ifndef NO_PRINTF_PERCENT_N
+ case 'n':
+ if (flags & LLONGINT)
+ ADDTYPE(TP_LLONG);
+ else if (flags & LONGINT)
+ ADDTYPE(TP_LONG);
+ else if (flags & SHORTINT)
+ ADDTYPE(TP_SHORT);
+ else if (flags & PTRINT)
+ ADDTYPE(TP_PTRINT);
+ else if (flags & SIZEINT)
+ ADDTYPE(TP_SSIZEINT);
+ else if (flags & MAXINT)
+ ADDTYPE(TP_MAXINT);
+ else
+ ADDTYPE(TP_INT);
+ continue; /* no output */
+#endif /* NO_PRINTF_PERCENT_N */
+ case 'O':
+ flags |= LONGINT;
+ /*FALLTHROUGH*/
+ case 'o':
+ ADDUARG();
+ break;
+ case 'p':
+ ADDTYPE(TP_VOID);
+ break;
+ case 'S':
+ flags |= LONGINT;
+ /*FALLTHROUGH*/
+ case 's':
+ if (flags & LONGINT)
+ ADDTYPE(TP_WCHAR);
+ else
+ ADDTYPE(TP_CHAR);
+ break;
+ case 'U':
+ flags |= LONGINT;
+ /*FALLTHROUGH*/
+ case 'u':
+ case 'X':
+ case 'x':
+ ADDUARG();
+ break;
+ default: /* "%?" prints ?, unless ? is NUL */
+ if (ch == '\0') goto done;
+ break;
+ }
+ }
+done:
+ /*
+ * Build the argument table.
+ */
+ if (tablemax >= STATIC_ARG_TBL_SIZE) {
+ *argtablesiz = sizeof(union arg) * (tablemax + 1);
+ *argtable = static_cast<arg*>(mmap(NULL, *argtablesiz,
+ PROT_WRITE | PROT_READ,
+ MAP_ANON | MAP_PRIVATE, -1, 0));
+ if (*argtable == MAP_FAILED) return -1;
+ }
+
+#if 0
+ /* XXX is this required? */
+ (*argtable)[0].intarg = 0;
+#endif
+ for (n = 1; n <= tablemax; n++) {
+ switch (typetable[n]) {
+ case T_UNUSED:
+ case T_CHAR:
+ case T_U_CHAR:
+ case T_SHORT:
+ case T_U_SHORT:
+ case T_INT:
+ (*argtable)[n].intarg = va_arg(ap, int);
+ break;
+ case TP_SHORT:
+ (*argtable)[n].pshortarg = va_arg(ap, short*);
+ break;
+ case T_U_INT:
+ (*argtable)[n].uintarg = va_arg(ap, unsigned int);
+ break;
+ case TP_INT:
+ (*argtable)[n].pintarg = va_arg(ap, int*);
+ break;
+ case T_LONG:
+ (*argtable)[n].longarg = va_arg(ap, long);
+ break;
+ case T_U_LONG:
+ (*argtable)[n].ulongarg = va_arg(ap, unsigned long);
+ break;
+ case TP_LONG:
+ (*argtable)[n].plongarg = va_arg(ap, long*);
+ break;
+ case T_LLONG:
+ (*argtable)[n].longlongarg = va_arg(ap, long long);
+ break;
+ case T_U_LLONG:
+ (*argtable)[n].ulonglongarg = va_arg(ap, unsigned long long);
+ break;
+ case TP_LLONG:
+ (*argtable)[n].plonglongarg = va_arg(ap, long long*);
+ break;
+ case T_DOUBLE:
+ (*argtable)[n].doublearg = va_arg(ap, double);
+ break;
+ case T_LONG_DOUBLE:
+ (*argtable)[n].longdoublearg = va_arg(ap, long double);
+ break;
+ case TP_CHAR:
+ (*argtable)[n].pchararg = va_arg(ap, char*);
+ break;
+ case TP_VOID:
+ (*argtable)[n].pvoidarg = va_arg(ap, void*);
+ break;
+ case T_PTRINT:
+ (*argtable)[n].ptrdiffarg = va_arg(ap, ptrdiff_t);
+ break;
+ case TP_PTRINT:
+ (*argtable)[n].pptrdiffarg = va_arg(ap, ptrdiff_t*);
+ break;
+ case T_SIZEINT:
+ (*argtable)[n].sizearg = va_arg(ap, size_t);
+ break;
+ case T_SSIZEINT:
+ (*argtable)[n].ssizearg = va_arg(ap, ssize_t);
+ break;
+ case TP_SSIZEINT:
+ (*argtable)[n].pssizearg = va_arg(ap, ssize_t*);
+ break;
+ case T_MAXINT:
+ (*argtable)[n].intmaxarg = va_arg(ap, intmax_t);
+ break;
+ case T_MAXUINT:
+ (*argtable)[n].uintmaxarg = va_arg(ap, uintmax_t);
+ break;
+ case TP_MAXINT:
+ (*argtable)[n].pintmaxarg = va_arg(ap, intmax_t*);
+ break;
+ case T_WINT:
+ (*argtable)[n].wintarg = va_arg(ap, wint_t);
+ break;
+ case TP_WCHAR:
+ (*argtable)[n].pwchararg = va_arg(ap, wchar_t*);
+ break;
+ }
+ }
+ goto finish;
+
+overflow:
+ errno = ENOMEM;
+ ret = -1;
+
+finish:
+ if (typetable != NULL && typetable != stattypetable) {
+ munmap(typetable, *argtablesiz);
+ typetable = NULL;
+ }
+ return (ret);
+}
+
+/*
+ * Increase the size of the type table.
+ */
+static int __grow_type_table(unsigned char** typetable, int* tablesize) {
+ unsigned char* old_table = *typetable;
+ int new_size = *tablesize * 2;
+
+ if (new_size < getpagesize()) new_size = getpagesize();
+
+ if (*tablesize == STATIC_ARG_TBL_SIZE) {
+ *typetable = static_cast<unsigned char*>(mmap(NULL, new_size,
+ PROT_WRITE | PROT_READ,
+ MAP_ANON | MAP_PRIVATE, -1, 0));
+ if (*typetable == MAP_FAILED) return -1;
+ bcopy(old_table, *typetable, *tablesize);
+ } else {
+ unsigned char* new_table = static_cast<unsigned char*>(mmap(NULL, new_size,
+ PROT_WRITE | PROT_READ,
+ MAP_ANON | MAP_PRIVATE, -1, 0));
+ if (new_table == MAP_FAILED) return -1;
+ memmove(new_table, *typetable, *tablesize);
+ munmap(*typetable, *tablesize);
+ *typetable = new_table;
+ }
+ memset(*typetable + *tablesize, T_UNUSED, (new_size - *tablesize));
+
+ *tablesize = new_size;
+ return 0;
+}