Upgrade to current vfprintf.
This gets us various bug fixes and missing C99 functionality.
Bug: https://code.google.com/p/android/issues/detail?id=64886
Change-Id: Ie9f8ac569e9b5eec1e4a1faacfe2c21662eaf895
diff --git a/libc/Android.mk b/libc/Android.mk
index fd14232..10b751d 100644
--- a/libc/Android.mk
+++ b/libc/Android.mk
@@ -79,7 +79,6 @@
stdio/fvwrite.c \
stdio/snprintf.c\
stdio/sprintf.c \
- stdio/vfprintf.c \
stdlib/atexit.c \
stdlib/ctype_.c \
stdlib/getenv.c \
@@ -394,6 +393,7 @@
upstream-openbsd/lib/libc/stdio/tmpnam.c \
upstream-openbsd/lib/libc/stdio/ungetc.c \
upstream-openbsd/lib/libc/stdio/vasprintf.c \
+ upstream-openbsd/lib/libc/stdio/vfprintf.c \
upstream-openbsd/lib/libc/stdio/vfscanf.c \
upstream-openbsd/lib/libc/stdio/vprintf.c \
upstream-openbsd/lib/libc/stdio/vscanf.c \
diff --git a/libc/bionic/wchar.cpp b/libc/bionic/wchar.cpp
index 8367817..a507808 100644
--- a/libc/bionic/wchar.cpp
+++ b/libc/bionic/wchar.cpp
@@ -243,21 +243,42 @@
return strftime(reinterpret_cast<char*>(wcs), maxsize, reinterpret_cast<const char*>(format), timptr);
}
-size_t wcsrtombs(char* dst, const wchar_t** src, size_t len, mbstate_t* /*ps*/) {
- const char* s = reinterpret_cast<const char*>(*src);
- const char* s2 = reinterpret_cast<const char*>(memchr(s, 0, len));
- if (s2 != NULL) {
- len = (s2 - s)+1;
+size_t wcsrtombs(char* dst, const wchar_t** src, size_t n, mbstate_t* /*ps*/) {
+ size_t i = 0; // Number of input characters read.
+ size_t o = 0; // Number of output bytes written.
+ for (; (*src)[i] != 0; ++i) {
+ // TODO: UTF-8 support.
+ if ((*src)[i] > 0x7f) {
+ errno = EILSEQ;
+ return static_cast<size_t>(-1);
+ }
+ if (dst != NULL) {
+ if (o + 1 > n) {
+ break;
+ }
+ dst[o++] = static_cast<char>((*src)[i]);
+ } else {
+ ++o;
+ }
}
+ // If we consumed all the input, terminate the output.
+ if (dst != NULL && o < n) {
+ dst[o] = 0;
+ }
+ // If we were actually consuming input, record how far we got.
if (dst != NULL) {
- memcpy( dst, s, len );
+ if ((*src)[i] != 0) {
+ *src = &(*src)[i]; // This is where the next call should pick up.
+ } else {
+ *src = NULL; // We consumed everything.
+ }
}
- *src = (wchar_t*)(s + len);
- return len;
+ return o;
}
size_t wcstombs(char* dst, const wchar_t* src, size_t len) {
- return wcsrtombs(dst, &src, len, NULL);
+ const wchar_t* p = src;
+ return wcsrtombs(dst, &p, len, NULL);
}
double wcstod(const wchar_t* nptr, wchar_t** endptr) {
diff --git a/libc/stdio/local.h b/libc/stdio/local.h
index facaa66..eecfeef 100644
--- a/libc/stdio/local.h
+++ b/libc/stdio/local.h
@@ -95,6 +95,8 @@
#define FUNLOCKFILE(fp) funlockfile(fp)
#define FLOATING_POINT
+#define PRINTF_WIDE_CHAR
+#define SCANF_WIDE_CHAR
/* OpenBSD exposes these in <stdio.h>, but we only want them exposed to the implementation. */
__BEGIN_DECLS
diff --git a/libc/upstream-openbsd/lib/libc/include/langinfo.h b/libc/upstream-openbsd/lib/libc/include/langinfo.h
new file mode 100644
index 0000000..a871ab8
--- /dev/null
+++ b/libc/upstream-openbsd/lib/libc/include/langinfo.h
@@ -0,0 +1,3 @@
+/* Hack to build "vfprintf.c". */
+#define RADIXCHAR 1
+#define nl_langinfo(i) ((i == RADIXCHAR) ? (char*) "." : NULL)
diff --git a/libc/stdio/floatio.h b/libc/upstream-openbsd/lib/libc/stdio/floatio.h
similarity index 72%
rename from libc/stdio/floatio.h
rename to libc/upstream-openbsd/lib/libc/stdio/floatio.h
index 20f9801..9769030 100644
--- a/libc/stdio/floatio.h
+++ b/libc/upstream-openbsd/lib/libc/stdio/floatio.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: floatio.h,v 1.3 2003/06/02 20:18:37 millert Exp $ */
+/* $OpenBSD: floatio.h,v 1.4 2008/09/07 20:36:08 martynas Exp $ */
/*-
* Copyright (c) 1990, 1993
@@ -40,3 +40,19 @@
#define MAXEXP 308
/* 128 bit fraction takes up 39 decimal digits; max reasonable precision */
#define MAXFRACT 39
+
+/*
+ * MAXEXPDIG is the maximum number of decimal digits needed to store a
+ * floating point exponent in the largest supported format. It should
+ * be ceil(log10(LDBL_MAX_10_EXP)) or, if hexadecimal floating point
+ * conversions are supported, ceil(log10(LDBL_MAX_EXP)). But since it
+ * is presently never greater than 5 in practice, we fudge it.
+ */
+#define MAXEXPDIG 6
+#if LDBL_MAX_EXP > 999999
+#error "floating point buffers too small"
+#endif
+
+char *__hdtoa(double, const char *, int, int *, int *, char **);
+char *__hldtoa(long double, const char *, int, int *, int *, char **);
+char *__ldtoa(long double *, int, int, int *, int *, char **);
diff --git a/libc/stdio/vfprintf.c b/libc/upstream-openbsd/lib/libc/stdio/vfprintf.c
similarity index 69%
rename from libc/stdio/vfprintf.c
rename to libc/upstream-openbsd/lib/libc/stdio/vfprintf.c
index 76ca659..b4f8f29 100644
--- a/libc/stdio/vfprintf.c
+++ b/libc/upstream-openbsd/lib/libc/stdio/vfprintf.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: vfprintf.c,v 1.37 2006/01/13 17:56:18 millert Exp $ */
+/* $OpenBSD: vfprintf.c,v 1.63 2013/03/02 19:40:08 guenther Exp $ */
/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
@@ -41,12 +41,16 @@
#include <sys/mman.h>
#include <errno.h>
+#include <langinfo.h>
+#include <limits.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
+#include <unistd.h>
+#include <wchar.h>
#include "local.h"
#include "fvwrite.h"
@@ -60,7 +64,7 @@
unsigned long long ulonglongarg;
ptrdiff_t ptrdiffarg;
size_t sizearg;
- size_t ssizearg;
+ ssize_t ssizearg;
intmax_t intmaxarg;
uintmax_t uintmaxarg;
void *pvoidarg;
@@ -71,12 +75,16 @@
long *plongarg;
long long *plonglongarg;
ptrdiff_t *pptrdiffarg;
- size_t *pssizearg;
+ ssize_t *pssizearg;
intmax_t *pintmaxarg;
#ifdef FLOATING_POINT
double doublearg;
long double longdoublearg;
#endif
+#ifdef PRINTF_WIDE_CHAR
+ wint_t wintarg;
+ wchar_t *pwchararg;
+#endif
};
static int __find_arguments(const char *fmt0, va_list ap, union arg **argtable,
@@ -136,24 +144,98 @@
return (ret);
}
+#ifdef PRINTF_WIDE_CHAR
+/*
+ * 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) {
+ errno = EILSEQ;
+ 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) {
+ errno = EILSEQ;
+ return (NULL);
+ }
+ }
+ }
+ if ((convbuf = 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);
+ errno = EILSEQ;
+ return (NULL);
+ }
+ convbuf[nbytes] = '\0';
+ return (convbuf);
+}
+#endif
#ifdef FLOATING_POINT
+#include <float.h>
#include <locale.h>
#include <math.h>
#include "floatio.h"
-#define BUF (MAXEXP+MAXFRACT+1) /* + decimal point */
#define DEFPREC 6
-static char *cvt(double, int, int, char *, int *, int, int *);
-extern void __freedtoa(char *);
+extern char *__dtoa(double, int, int, int *, int *, char **);
+extern void __freedtoa(char *);
static int exponent(char *, int, int);
-#else /* no FLOATING_POINT */
-#define BUF 40
#endif /* FLOATING_POINT */
+/*
+ * 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. */
+
/*
* Macros for converting digits to letters and vice versa
*/
@@ -165,9 +247,8 @@
* Flags used during conversion.
*/
#define ALT 0x0001 /* alternate form */
-#define HEXPREFIX 0x0002 /* add 0x or 0X prefix */
#define LADJUST 0x0004 /* left adjustment */
-#define LONGDBL 0x0008 /* long double; unimplemented */
+#define LONGDBL 0x0008 /* long double */
#define LONGINT 0x0010 /* long integer */
#define LLONGINT 0x0020 /* long long integer */
#define SHORTINT 0x0040 /* short integer */
@@ -194,54 +275,81 @@
{
char *fmt; /* format string */
int ch; /* character from fmt */
- int n, m, n2; /* handy integers (short term usage) */
+ 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 (%.3d), or -1 */
+ int prec; /* precision from format; <0 for N/A */
char sign; /* sign prefix (' ', '+', '-', or \0) */
wchar_t wc;
- void* ps;
+ mbstate_t ps;
#ifdef FLOATING_POINT
- char *decimal_point = ".";
- char softsign; /* temporary negative sign for floats */
- double _double = 0.; /* double precision arguments %[eEfgG] */
+ /*
+ * 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 */
- int expsize = 0; /* character count for expstr */
- int ndig; /* actual number of digits returned by cvt */
- char expstr[7]; /* buffer for exponent string */
+ 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;
#endif
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 */
+ 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 */
- char* xdigs = NULL; /* digits for [xX] conversion */
+ 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]; /* space for %c, %[diouxX], %[eEfgG] */
- char ox[2]; /* space for 0x hex-prefix */
+ 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 */
+#ifdef PRINTF_WIDE_CHAR
+ char *convbuf; /* buffer for wide to multi-byte conversion */
+#endif
+
/*
* 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 const char blanks[PADSIZE] =
+ static char blanks[PADSIZE] =
{' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '};
- static const char zeroes[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[16] = "0123456789abcdef";
+ static const char xdigs_upper[16] = "0123456789ABCDEF";
+
/*
* BEWARE, these `goto error' on error, and PAD uses `n'.
*/
@@ -265,6 +373,14 @@
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; \
@@ -295,6 +411,18 @@
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$. Preserve the nextarg
* that the argument can be gotten once the type is determined.
@@ -303,7 +431,7 @@
n2 = 0; \
cp = fmt; \
while (is_digit(*cp)) { \
- n2 = 10 * n2 + to_digit(*cp); \
+ APPEND_DIGIT(n2, *cp); \
cp++; \
} \
if (*cp == '$') { \
@@ -349,6 +477,9 @@
uio.uio_resid = 0;
uio.uio_iovcnt = 0;
ret = 0;
+#ifdef PRINTF_WIDE_CHAR
+ convbuf = NULL;
+#endif
memset(&ps, 0, sizeof(ps));
/*
@@ -356,16 +487,6 @@
*/
for (;;) {
cp = fmt;
-#if 1 /* BIONIC */
- n = -1;
- while ( (wc = *fmt) != 0 ) {
- if (wc == '%') {
- n = 1;
- break;
- }
- fmt++;
- }
-#else
while ((n = mbrtowc(&wc, fmt, MB_CUR_MAX, &ps)) > 0) {
fmt += n;
if (wc == '%') {
@@ -373,8 +494,10 @@
break;
}
}
-#endif
- if ((m = fmt - cp) != 0) {
+ if (fmt != cp) {
+ ptrdiff_t m = fmt - cp;
+ if (m < 0 || m > INT_MAX - ret)
+ goto overflow;
PRINT(cp, m);
ret += m;
}
@@ -387,6 +510,7 @@
width = 0;
prec = -1;
sign = '\0';
+ ox[1] = '\0';
rflag: ch = *fmt++;
reswitch: switch (ch) {
@@ -402,6 +526,9 @@
case '#':
flags |= ALT;
goto rflag;
+ case '\'':
+ /* grouping not implemented */
+ goto rflag;
case '*':
/*
* ``A negative field width argument is taken as a
@@ -412,6 +539,8 @@
GETASTER(width);
if (width >= 0)
goto rflag;
+ if (width == INT_MIN)
+ goto overflow;
width = -width;
/* FALLTHROUGH */
case '-':
@@ -428,7 +557,7 @@
}
n = 0;
while (is_digit(ch)) {
- n = 10 * n + to_digit(ch);
+ APPEND_DIGIT(n, ch);
ch = *fmt++;
}
if (ch == '$') {
@@ -440,7 +569,7 @@
}
goto rflag;
}
- prec = n < 0 ? -1 : n;
+ prec = n;
goto reswitch;
case '0':
/*
@@ -454,7 +583,7 @@
case '5': case '6': case '7': case '8': case '9':
n = 0;
do {
- n = 10 * n + to_digit(ch);
+ APPEND_DIGIT(n, ch);
ch = *fmt++;
} while (is_digit(ch));
if (ch == '$') {
@@ -502,8 +631,28 @@
flags |= SIZEINT;
goto rflag;
case 'c':
- *(cp = buf) = GETARG(int);
- size = 1;
+#ifdef PRINTF_WIDE_CHAR
+ 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) {
+ fp->_flags |= __SERR;
+ errno = EILSEQ;
+ goto error;
+ }
+ cp = buf;
+ size = (int)mbseqlen;
+ } else {
+#endif
+ *(cp = buf) = GETARG(int);
+ size = 1;
+#ifdef PRINTF_WIDE_CHAR
+ }
+#endif
sign = '\0';
break;
case 'D':
@@ -519,79 +668,140 @@
base = DEC;
goto number;
#ifdef FLOATING_POINT
+ 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':
- if (prec == -1) {
+ expchar = ch - ('g' - 'e');
+ if (prec == 0)
+ prec = 1;
+fp_begin:
+ if (prec < 0)
prec = DEFPREC;
- } else if ((ch == 'g' || ch == 'G') && prec == 0) {
- prec = 1;
- }
-
+ if (dtoaresult)
+ __freedtoa(dtoaresult);
if (flags & LONGDBL) {
- _double = (double) GETARG(long double);
- } else {
- _double = GETARG(double);
- }
-
- /* do this before tricky precision changes */
- if (isinf(_double)) {
- if (_double < 0)
- sign = '-';
- cp = "Inf";
- size = 3;
- break;
- }
- if (isnan(_double)) {
- cp = "NaN";
- size = 3;
- break;
- }
-
- if (dtoaresult != NULL) __freedtoa(dtoaresult);
- flags |= FPT;
- dtoaresult = cp = cvt(_double, prec, flags, &softsign,
- &expt, ch, &ndig);
- if (ch == 'g' || ch == 'G') {
- if (expt <= -4 || expt > prec)
- ch = (ch == 'g') ? 'e' : 'E';
- else
- ch = 'g';
- }
- if (ch <= 'e') { /* 'e' or 'E' fmt */
- --expt;
- expsize = exponent(expstr, expt, ch);
- size = expsize + ndig;
- if (ndig > 1 || flags & ALT)
- ++size;
- } else if (ch == 'f') { /* f fmt */
- if (expt > 0) {
- size = expt;
- if (prec || flags & ALT)
- size += prec + 1;
- } else { /* "0.X" */
- size = prec + 2;
+ 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 if (expt >= ndig) { /* fixed g fmt */
- size = expt;
- if (flags & ALT)
- ++size;
} else {
- size = ndig + (expt > 0 ? 1 : 2 - expt);
- }
-
- if (softsign)
+ 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 = (ch >= 'a') ? "nan" : "NAN";
+ sign = '\0';
+ } else
+ cp = (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;
#endif /* FLOATING_POINT */
-/* the Android security team suggests removing support for %n
- * since it has no real practical value, and could lead to
- * running malicious code (for really buggy programs that
- * send to printf() user-generated formatting strings).
- */
-#if 0
case 'n':
if (flags & LLONGINT)
*GETARG(long long *) = ret;
@@ -610,7 +820,6 @@
else
*GETARG(int *) = ret;
continue; /* no output */
-#endif
case 'O':
flags |= LONGINT;
/*FALLTHROUGH*/
@@ -629,11 +838,30 @@
/* NOSTRICT */
_umax = (u_long)GETARG(void *);
base = HEX;
- xdigs = "0123456789abcdef";
- flags |= HEXPREFIX;
- ch = 'x';
+ xdigs = xdigs_lower;
+ ox[1] = 'x';
goto nosign;
case 's':
+#ifdef PRINTF_WIDE_CHAR
+ if (flags & LONGINT) {
+ wchar_t *wcp;
+
+ if (convbuf != NULL) {
+ free(convbuf);
+ convbuf = NULL;
+ }
+ if ((wcp = GETARG(wchar_t *)) == NULL) {
+ cp = "(null)";
+ } else {
+ convbuf = __wcsconv(wcp, prec);
+ if (convbuf == NULL) {
+ fp->_flags = __SERR;
+ goto error;
+ }
+ cp = convbuf;
+ }
+ } else
+#endif /* PRINTF_WIDE_CHAR */
if ((cp = GETARG(char *)) == NULL)
cp = "(null)";
if (prec >= 0) {
@@ -644,15 +872,13 @@
*/
char *p = memchr(cp, 0, prec);
- if (p != NULL) {
- size = p - cp;
- if (size > prec)
- size = prec;
- } else {
- size = prec;
- }
+ size = p ? (p - cp) : prec;
} else {
- size = strlen(cp);
+ size_t len;
+
+ if ((len = strlen(cp)) > INT_MAX)
+ goto overflow;
+ size = (int)len;
}
sign = '\0';
break;
@@ -664,15 +890,15 @@
base = DEC;
goto nosign;
case 'X':
- xdigs = "0123456789ABCDEF";
+ xdigs = xdigs_upper;
goto hex;
case 'x':
- xdigs = "0123456789abcdef";
+ xdigs = xdigs_lower;
hex: _umax = UARG();
base = HEX;
/* leading 0x/X only if non-zero */
if (flags & ALT && _umax != 0)
- flags |= HEXPREFIX;
+ ox[1] = ch;
/* unsigned conversions */
nosign: sign = '\0';
@@ -730,6 +956,8 @@
}
}
size = buf + BUF - cp;
+ if (size > BUF) /* should never happen */
+ abort();
skipsize:
break;
default: /* "%?" prints ?, unless ? is NUL */
@@ -750,7 +978,7 @@
* 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
+ * 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.
*
@@ -760,7 +988,7 @@
realsz = dprec > size ? dprec : size;
if (sign)
realsz++;
- else if (flags & HEXPREFIX)
+ if (ox[1])
realsz+= 2;
/* right-adjusting blank padding */
@@ -768,11 +996,10 @@
PAD(width - realsz, blanks);
/* prefix */
- if (sign) {
+ if (sign)
PRINT(&sign, 1);
- } else if (flags & HEXPREFIX) {
+ if (ox[1]) { /* ox[1] is either x, X, or \0 */
ox[0] = '0';
- ox[1] = ch;
PRINT(ox, 2);
}
@@ -788,41 +1015,30 @@
if ((flags & FPT) == 0) {
PRINT(cp, size);
} else { /* glue together f_p fragments */
- if (ch >= 'f') { /* 'f' or 'g' */
- if (_double == 0) {
- /* kludge for __dtoa irregularity */
- PRINT("0", 1);
- if (expt < ndig || (flags & ALT) != 0) {
+ 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(ndig - 1, zeroes);
- }
- } else if (expt <= 0) {
- PRINT("0", 1);
- PRINT(decimal_point, 1);
PAD(-expt, zeroes);
- PRINT(cp, ndig);
- } else if (expt >= ndig) {
- PRINT(cp, ndig);
- PAD(expt - ndig, zeroes);
- if (flags & ALT)
- PRINT(".", 1);
- } else {
- PRINT(cp, expt);
- cp += expt;
- PRINT(".", 1);
- PRINT(cp, ndig-expt);
+ /* already handled initial 0's */
+ prec += expt;
+ } else {
+ PRINTANDPAD(cp, dtoaend, lead, zeroes);
+ cp += lead;
+ if (prec || flags & ALT)
+ PRINT(decimal_point, 1);
}
- } else { /* 'e' or 'E' */
- if (ndig > 1 || flags & ALT) {
- ox[0] = *cp++;
- ox[1] = '.';
- PRINT(ox, 2);
- if (_double) {
- PRINT(cp, ndig-1);
- } else {/* 0.[0..] */
- /* __dtoa irregularity */
- PAD(ndig - 1, zeroes);
- }
+ 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);
}
@@ -837,25 +1053,40 @@
PAD(width - realsz, blanks);
/* finally, adjust ret */
- ret += width > realsz ? width : realsz;
+ 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:
+#ifdef PRINTF_WIDE_CHAR
+ if (convbuf)
+ free(convbuf);
+#endif
#ifdef FLOATING_POINT
- if (dtoaresult != NULL) {
+ if (dtoaresult)
__freedtoa(dtoaresult);
- }
#endif
if (argtable != NULL && argtable != statargtable) {
munmap(argtable, argtablesiz);
argtable = NULL;
}
- va_end(orgap);
- return (__sferror(fp) ? EOF : ret);
- /* NOTREACHED */
+ return (ret);
}
/*
@@ -886,6 +1117,10 @@
#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
@@ -909,8 +1144,9 @@
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;
- void* ps;
+ mbstate_t ps;
/*
* Add an argument type to the table, expanding if necessary.
@@ -927,7 +1163,8 @@
((flags&SIZEINT) ? ADDTYPE(T_SSIZEINT) : \
((flags&LLONGINT) ? ADDTYPE(T_LLONG) : \
((flags&LONGINT) ? ADDTYPE(T_LONG) : \
- ((flags&SHORTINT) ? ADDTYPE(T_SHORT) : ADDTYPE(T_INT)))))))
+ ((flags&SHORTINT) ? ADDTYPE(T_SHORT) : \
+ ((flags&CHARINT) ? ADDTYPE(T_CHAR) : ADDTYPE(T_INT))))))))
#define ADDUARG() \
((flags&MAXINT) ? ADDTYPE(T_MAXUINT) : \
@@ -935,7 +1172,8 @@
((flags&SIZEINT) ? ADDTYPE(T_SIZEINT) : \
((flags&LLONGINT) ? ADDTYPE(T_U_LLONG) : \
((flags&LONGINT) ? ADDTYPE(T_U_LONG) : \
- ((flags&SHORTINT) ? ADDTYPE(T_U_SHORT) : ADDTYPE(T_U_INT)))))))
+ ((flags&SHORTINT) ? ADDTYPE(T_U_SHORT) : \
+ ((flags&CHARINT) ? ADDTYPE(T_U_CHAR) : ADDTYPE(T_U_INT))))))))
/*
* Add * arguments to the type array.
@@ -944,7 +1182,7 @@
n2 = 0; \
cp = fmt; \
while (is_digit(*cp)) { \
- n2 = 10 * n2 + to_digit(*cp); \
+ APPEND_DIGIT(n2, *cp); \
cp++; \
} \
if (*cp == '$') { \
@@ -969,16 +1207,6 @@
*/
for (;;) {
cp = fmt;
-#if 1 /* BIONIC */
- n = -1;
- while ((wc = *fmt) != 0) {
- if (wc == '%') {
- n = 1;
- break;
- }
- fmt++;
- }
-#else
while ((n = mbrtowc(&wc, fmt, MB_CUR_MAX, &ps)) > 0) {
fmt += n;
if (wc == '%') {
@@ -986,7 +1214,6 @@
break;
}
}
-#endif
if (n <= 0)
goto done;
fmt++; /* skip over '%' */
@@ -997,6 +1224,7 @@
reswitch: switch (ch) {
case ' ':
case '#':
+ case '\'':
goto rflag;
case '*':
ADDASTER();
@@ -1019,7 +1247,7 @@
case '5': case '6': case '7': case '8': case '9':
n = 0;
do {
- n = 10 * n + to_digit(ch);
+ APPEND_DIGIT(n ,ch);
ch = *fmt++;
} while (is_digit(ch));
if (ch == '$') {
@@ -1040,6 +1268,9 @@
flags |= SHORTINT;
}
goto rflag;
+ case 'j':
+ flags |= MAXINT;
+ goto rflag;
case 'l':
if (*fmt == 'l') {
fmt++;
@@ -1058,7 +1289,12 @@
flags |= SIZEINT;
goto rflag;
case 'c':
- ADDTYPE(T_INT);
+#ifdef PRINTF_WIDE_CHAR
+ if (flags & LONGINT)
+ ADDTYPE(T_WINT);
+ else
+#endif
+ ADDTYPE(T_INT);
break;
case 'D':
flags |= LONGINT;
@@ -1068,9 +1304,12 @@
ADDSARG();
break;
#ifdef FLOATING_POINT
+ case 'a':
+ case 'A':
case 'e':
case 'E':
case 'f':
+ case 'F':
case 'g':
case 'G':
if (flags & LONGDBL)
@@ -1105,7 +1344,12 @@
ADDTYPE(TP_VOID);
break;
case 's':
- ADDTYPE(TP_CHAR);
+#ifdef PRINTF_WIDE_CHAR
+ if (flags & LONGINT)
+ ADDTYPE(TP_WCHAR);
+ else
+#endif
+ ADDTYPE(TP_CHAR);
break;
case 'U':
flags |= LONGINT;
@@ -1140,20 +1384,16 @@
for (n = 1; n <= tablemax; n++) {
switch (typetable[n]) {
case T_UNUSED:
- (*argtable)[n].intarg = va_arg(ap, int);
- break;
+ case T_CHAR:
+ case T_U_CHAR:
case T_SHORT:
- (*argtable)[n].intarg = va_arg(ap, int);
- break;
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_INT:
- (*argtable)[n].intarg = va_arg(ap, int);
- break;
case T_U_INT:
(*argtable)[n].uintarg = va_arg(ap, unsigned int);
break;
@@ -1207,17 +1447,37 @@
case TP_SSIZEINT:
(*argtable)[n].pssizearg = va_arg(ap, ssize_t *);
break;
- case TP_MAXINT:
+ 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;
+#ifdef PRINTF_WIDE_CHAR
+ case T_WINT:
+ (*argtable)[n].wintarg = va_arg(ap, wint_t);
+ break;
+ case TP_WCHAR:
+ (*argtable)[n].pwchararg = va_arg(ap, wchar_t *);
+ break;
+#endif
}
}
+ goto finish;
+overflow:
+ errno = ENOMEM;
+ ret = -1;
+
+finish:
if (typetable != NULL && typetable != stattypetable) {
munmap(typetable, *argtablesiz);
typetable = NULL;
}
- return (0);
+ return (ret);
}
/*
@@ -1229,12 +1489,15 @@
unsigned char *oldtable = *typetable;
int newsize = *tablesize * 2;
+ if (newsize < getpagesize())
+ newsize = getpagesize();
+
if (*tablesize == STATIC_ARG_TBL_SIZE) {
*typetable = mmap(NULL, newsize, PROT_WRITE|PROT_READ,
MAP_ANON|MAP_PRIVATE, -1, 0);
if (*typetable == MAP_FAILED)
return (-1);
- memcpy( *typetable, oldtable, *tablesize);
+ bcopy(oldtable, *typetable, *tablesize);
} else {
unsigned char *new = mmap(NULL, newsize, PROT_WRITE|PROT_READ,
MAP_ANON|MAP_PRIVATE, -1, 0);
@@ -1250,58 +1513,13 @@
return (0);
}
-
+
#ifdef FLOATING_POINT
-
-extern char *__dtoa(double, int, int, int *, int *, char **);
-
-static char *
-cvt(double value, int ndigits, int flags, char *sign, int *decpt, int ch,
- int *length)
-{
- int mode, dsgn;
- char *digits, *bp, *rve;
-
- if (ch == 'f') {
- mode = 3; /* ndigits after the decimal point */
- } else {
- /* To obtain ndigits after the decimal point for the 'e'
- * and 'E' formats, round to ndigits + 1 significant
- * figures.
- */
- if (ch == 'e' || ch == 'E') {
- ndigits++;
- }
- mode = 2; /* ndigits significant digits */
- }
-
- if (value < 0) {
- value = -value;
- *sign = '-';
- } else
- *sign = '\000';
- digits = __dtoa(value, mode, ndigits, decpt, &dsgn, &rve);
- if ((ch != 'g' && ch != 'G') || flags & ALT) {/* Print trailing zeros */
- bp = digits + ndigits;
- if (ch == 'f') {
- if (*digits == '0' && value)
- *decpt = -ndigits + 1;
- bp += *decpt;
- }
- if (value == 0) /* kludge for __dtoa irregularity */
- rve = bp;
- while (rve < bp)
- *rve++ = '0';
- }
- *length = rve - digits;
- return (digits);
-}
-
static int
exponent(char *p0, int exp, int fmtch)
{
char *p, *t;
- char expbuf[MAXEXP];
+ char expbuf[MAXEXPDIG];
p = p0;
*p++ = fmtch;
@@ -1310,19 +1528,25 @@
*p++ = '-';
} else
*p++ = '+';
- t = expbuf + MAXEXP;
+ t = expbuf + MAXEXPDIG;
if (exp > 9) {
do {
*--t = to_char(exp % 10);
} while ((exp /= 10) > 9);
*--t = to_char(exp);
- for (; t < expbuf + MAXEXP; *p++ = *t++)
+ for (; t < expbuf + MAXEXPDIG; *p++ = *t++)
/* nothing */;
} else {
- *p++ = '0';
+ /*
+ * 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);
}
-
#endif /* FLOATING_POINT */
diff --git a/tests/stdio_test.cpp b/tests/stdio_test.cpp
index f991a5b..d825c14 100644
--- a/tests/stdio_test.cpp
+++ b/tests/stdio_test.cpp
@@ -23,6 +23,7 @@
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
+#include <wchar.h>
TEST(stdio, tmpfile_fileno_fprintf_rewind_fgets) {
FILE* fp = tmpfile();
@@ -192,18 +193,38 @@
snprintf(buf, sizeof(buf), "%zd", v);
}
-TEST(stdio, snprintf_n_format_specifier_not_implemented) {
-#if defined(__BIONIC__)
+// https://code.google.com/p/android/issues/detail?id=64886
+TEST(stdio, snprintf_a) {
+ char buf[BUFSIZ];
+ EXPECT_EQ(23, snprintf(buf, sizeof(buf), "<%a>", 9990.235));
+ EXPECT_STREQ("<0x1.3831e147ae148p+13>", buf);
+}
+
+TEST(stdio, snprintf_lc) {
+ char buf[BUFSIZ];
+ wint_t wc = L'a';
+ EXPECT_EQ(3, snprintf(buf, sizeof(buf), "<%lc>", wc));
+ EXPECT_STREQ("<a>", buf);
+}
+
+TEST(stdio, snprintf_ls) {
+ char buf[BUFSIZ];
+ wchar_t* ws = NULL;
+ EXPECT_EQ(8, snprintf(buf, sizeof(buf), "<%ls>", ws));
+ EXPECT_STREQ("<(null)>", buf);
+
+ wchar_t chars[] = { L'h', L'i', 0 };
+ ws = chars;
+ EXPECT_EQ(4, snprintf(buf, sizeof(buf), "<%ls>", ws));
+ EXPECT_STREQ("<hi>", buf);
+}
+
+TEST(stdio, snprintf_n) {
char buf[32];
int i = 0;
- // We deliberately don't implement %n, so it's treated like
- // any other unrecognized format specifier.
- EXPECT_EQ(5, snprintf(buf, sizeof(buf), "a %n b", &i));
- EXPECT_EQ(0, i);
- EXPECT_STREQ("a n b", buf);
-#else // __BIONIC__
- GTEST_LOG_(INFO) << "This test does nothing.\n";
-#endif // __BIONIC__
+ EXPECT_EQ(4, snprintf(buf, sizeof(buf), "a %n b", &i));
+ EXPECT_EQ(2, i);
+ EXPECT_STREQ("a b", buf);
}
TEST(stdio, snprintf_smoke) {
diff --git a/tests/wchar_test.cpp b/tests/wchar_test.cpp
index 20566f2..0a63b00 100644
--- a/tests/wchar_test.cpp
+++ b/tests/wchar_test.cpp
@@ -16,6 +16,7 @@
#include <gtest/gtest.h>
+#include <errno.h>
#include <limits.h>
#include <wchar.h>
@@ -55,3 +56,102 @@
EXPECT_EQ(1U, wcrtomb(bytes, L'h', NULL));
EXPECT_EQ('h', bytes[0]);
}
+
+TEST(wchar, wcstombs_wcrtombs) {
+ wchar_t chars[] = { L'h', L'e', L'l', L'l', L'o', 0 };
+ wchar_t bad_chars[] = { L'h', L'i', 666, 0 };
+ const wchar_t* src;
+ char bytes[BUFSIZ];
+
+ // Given a NULL destination, these functions count valid characters.
+ EXPECT_EQ(5U, wcstombs(NULL, chars, 0));
+ EXPECT_EQ(5U, wcstombs(NULL, chars, 4));
+ EXPECT_EQ(5U, wcstombs(NULL, chars, 256));
+ src = chars;
+ EXPECT_EQ(5U, wcsrtombs(NULL, &src, 0, NULL));
+ EXPECT_EQ(&chars[0], src);
+ src = chars;
+ EXPECT_EQ(5U, wcsrtombs(NULL, &src, 4, NULL));
+ EXPECT_EQ(&chars[0], src);
+ src = chars;
+ EXPECT_EQ(5U, wcsrtombs(NULL, &src, 256, NULL));
+ EXPECT_EQ(&chars[0], src);
+
+ // An unrepresentable char just returns an error from wcstombs...
+ errno = 0;
+ EXPECT_EQ(static_cast<size_t>(-1), wcstombs(NULL, bad_chars, 0));
+ EXPECT_EQ(EILSEQ, errno);
+ errno = 0;
+ EXPECT_EQ(static_cast<size_t>(-1), wcstombs(NULL, bad_chars, 256));
+ EXPECT_EQ(EILSEQ, errno);
+
+ // And wcsrtombs doesn't tell us where it got stuck because we didn't ask it
+ // to actually convert anything...
+ errno = 0;
+ src = bad_chars;
+ EXPECT_EQ(static_cast<size_t>(-1), wcsrtombs(NULL, &src, 0, NULL));
+ EXPECT_EQ(&bad_chars[0], src);
+ EXPECT_EQ(EILSEQ, errno);
+ errno = 0;
+ src = bad_chars;
+ EXPECT_EQ(static_cast<size_t>(-1), wcsrtombs(NULL, &src, 256, NULL));
+ EXPECT_EQ(&bad_chars[0], src);
+ EXPECT_EQ(EILSEQ, errno);
+
+ // Okay, now let's test actually converting something...
+ memset(bytes, 'x', sizeof(bytes));
+ EXPECT_EQ(0U, wcstombs(bytes, chars, 0));
+ memset(bytes, 'x', sizeof(bytes));
+ EXPECT_EQ(4U, wcstombs(bytes, chars, 4));
+ bytes[5] = 0;
+ EXPECT_STREQ("hellx", bytes);
+ memset(bytes, 'x', sizeof(bytes));
+ EXPECT_EQ(5U, wcstombs(bytes, chars, 256));
+ EXPECT_STREQ("hello", bytes);
+ memset(bytes, 'x', sizeof(bytes));
+ EXPECT_EQ(5U, wcstombs(bytes, chars, 6));
+ EXPECT_STREQ("hello", bytes);
+ errno = 0;
+ memset(bytes, 'x', sizeof(bytes));
+ EXPECT_EQ(static_cast<size_t>(-1), wcstombs(bytes, bad_chars, 256));
+ EXPECT_EQ(EILSEQ, errno);
+ bytes[3] = 0;
+ EXPECT_STREQ("hix", bytes);
+
+ // wcsrtombs is a bit more informative...
+ memset(bytes, 'x', sizeof(bytes));
+ src = chars;
+ EXPECT_EQ(0U, wcsrtombs(bytes, &src, 0, NULL));
+ EXPECT_EQ(&chars[0], src); // No input consumed.
+ EXPECT_EQ(EILSEQ, errno);
+
+ memset(bytes, 'x', sizeof(bytes));
+ src = chars;
+ EXPECT_EQ(4U, wcsrtombs(bytes, &src, 4, NULL));
+ EXPECT_EQ(&chars[4], src); // Some input consumed.
+ EXPECT_EQ(EILSEQ, errno);
+ bytes[5] = 0;
+ EXPECT_STREQ("hellx", bytes);
+
+ memset(bytes, 'x', sizeof(bytes));
+ src = chars;
+ EXPECT_EQ(5U, wcsrtombs(bytes, &src, 256, NULL));
+ EXPECT_EQ(NULL, src); // All input consumed!
+ EXPECT_EQ(EILSEQ, errno);
+ EXPECT_STREQ("hello", bytes);
+
+ memset(bytes, 'x', sizeof(bytes));
+ src = chars;
+ EXPECT_EQ(5U, wcsrtombs(bytes, &src, 6, NULL));
+ EXPECT_EQ(NULL, src); // All input consumed.
+ EXPECT_EQ(EILSEQ, errno);
+ EXPECT_STREQ("hello", bytes);
+
+ memset(bytes, 'x', sizeof(bytes));
+ src = bad_chars;
+ EXPECT_EQ(static_cast<size_t>(-1), wcsrtombs(bytes, &src, 256, NULL));
+ EXPECT_EQ(&bad_chars[2], src);
+ EXPECT_EQ(EILSEQ, errno);
+ bytes[3] = 0;
+ EXPECT_STREQ("hix", bytes);
+}