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Merge "printf unification: floating point." am: a198c71752 am: 3ef0a47b71

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Original change: https://android-review.googlesource.com/c/platform/bionic/+/2583717

Change-Id: I3f5b5da8734a5bd87f5c39490206bce24d74df5d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
This commit is contained in:
Elliott Hughes 2023-05-12 21:50:36 +00:00 committed by Automerger Merge Worker
commit d2b4fab8d8
7 changed files with 42 additions and 29 deletions
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14
libc/stdio/local.h
View file

@ -290,17 +290,21 @@ char* __ldtoa(long double*, int, int, int*, int*, char**);
#define WCIO_GET(fp) (_EXT(fp) ? &(_EXT(fp)->_wcio) : (struct wchar_io_data*)0)
#define _SET_ORIENTATION(fp, mode) \
do { \
struct wchar_io_data* _wcio = WCIO_GET(fp); \
if (_wcio && _wcio->wcio_mode == 0) _wcio->wcio_mode = (mode); \
#define ORIENT_BYTES (-1)
#define ORIENT_UNKNOWN 0
#define ORIENT_CHARS 1
#define _SET_ORIENTATION(fp, mode) \
do { \
struct wchar_io_data* _wcio = WCIO_GET(fp); \
if (_wcio && _wcio->wcio_mode == ORIENT_UNKNOWN) _wcio->wcio_mode = (mode); \
} while (0)
#define WCIO_FREE(fp) \
do { \
struct wchar_io_data* _wcio = WCIO_GET(fp); \
if (_wcio) { \
_wcio->wcio_mode = 0; \
_wcio->wcio_mode = ORIENT_UNKNOWN; \
_wcio->wcio_ungetwc_inbuf = 0; \
} \
} while (0)

8
libc/stdio/stdio.cpp
View file

@ -773,7 +773,7 @@ char* fgets(char* buf, int n, FILE* fp) {
char* fgets_unlocked(char* buf, int n, FILE* fp) {
if (n <= 0) __fortify_fatal("fgets: buffer size %d <= 0", n);
_SET_ORIENTATION(fp, -1);
_SET_ORIENTATION(fp, ORIENT_BYTES);
char* s = buf;
n--; // Leave space for NUL.
@ -903,7 +903,7 @@ int putc_unlocked(int c, FILE* fp) {
errno = EBADF;
return EOF;
}
_SET_ORIENTATION(fp, -1);
_SET_ORIENTATION(fp, ORIENT_BYTES);
if (--fp->_w >= 0 || (fp->_w >= fp->_lbfsize && c != '\n')) {
return (*fp->_p++ = c);
}
@ -1098,7 +1098,7 @@ size_t fread_unlocked(void* buf, size_t size, size_t count, FILE* fp) {
size_t total = desired_total;
if (total == 0) return 0;
_SET_ORIENTATION(fp, -1);
_SET_ORIENTATION(fp, ORIENT_BYTES);
// TODO: how can this ever happen?!
if (fp->_r < 0) fp->_r = 0;
@ -1165,7 +1165,7 @@ size_t fwrite_unlocked(const void* buf, size_t size, size_t count, FILE* fp) {
__siov iov = { .iov_base = const_cast<void*>(buf), .iov_len = n };
__suio uio = { .uio_iov = &iov, .uio_iovcnt = 1, .uio_resid = n };
_SET_ORIENTATION(fp, -1);
_SET_ORIENTATION(fp, ORIENT_BYTES);
// The usual case is success (__sfvwrite returns 0); skip the divide if this happens,
// since divides are generally slow.

24
libc/stdio/vfprintf.cpp
View file

@ -39,7 +39,7 @@
#define CHAR_TYPE_inf "inf"
#define CHAR_TYPE_NAN "NAN"
#define CHAR_TYPE_nan "nan"
#define CHAR_TYPE_ORIENTATION -1
#define CHAR_TYPE_ORIENTATION ORIENT_BYTES
#define PRINT(ptr, len) \
do { \
@ -361,14 +361,14 @@ int FUNCTION_NAME(FILE* fp, const CHAR_TYPE* fmt0, va_list ap) {
if (dtoaresult) __freedtoa(dtoaresult);
if (flags & LONGDBL) {
fparg.ldbl = GETARG(long double);
dtoaresult = cp = __hldtoa(fparg.ldbl, xdigs, prec, &expt, &signflag, &dtoaend);
dtoaresult = __hldtoa(fparg.ldbl, xdigs, prec, &expt, &signflag, &dtoaend);
if (dtoaresult == nullptr) {
errno = ENOMEM;
goto error;
}
} else {
fparg.dbl = GETARG(double);
dtoaresult = cp = __hdtoa(fparg.dbl, xdigs, prec, &expt, &signflag, &dtoaend);
dtoaresult = __hdtoa(fparg.dbl, xdigs, prec, &expt, &signflag, &dtoaend);
if (dtoaresult == nullptr) {
errno = ENOMEM;
goto error;
@ -398,14 +398,14 @@ int FUNCTION_NAME(FILE* fp, const CHAR_TYPE* fmt0, va_list ap) {
if (dtoaresult) __freedtoa(dtoaresult);
if (flags & LONGDBL) {
fparg.ldbl = GETARG(long double);
dtoaresult = cp = __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec, &expt, &signflag, &dtoaend);
dtoaresult = __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec, &expt, &signflag, &dtoaend);
if (dtoaresult == nullptr) {
errno = ENOMEM;
goto error;
}
} else {
fparg.dbl = GETARG(double);
dtoaresult = cp = __dtoa(fparg.dbl, expchar ? 2 : 3, prec, &expt, &signflag, &dtoaend);
dtoaresult = __dtoa(fparg.dbl, expchar ? 2 : 3, prec, &expt, &signflag, &dtoaend);
if (dtoaresult == nullptr) {
errno = ENOMEM;
goto error;
@ -413,6 +413,13 @@ int FUNCTION_NAME(FILE* fp, const CHAR_TYPE* fmt0, va_list ap) {
if (expt == 9999) expt = INT_MAX;
}
fp_common:
#if CHAR_TYPE_ORIENTATION == ORIENT_BYTES
cp = dtoaresult;
#else
free(convbuf);
cp = convbuf = helpers::mbsconv(dtoaresult, -1);
if (cp == nullptr) goto error;
#endif
if (signflag) sign = '-';
if (expt == INT_MAX) { /* inf or nan */
if (*cp == 'N') {
@ -425,7 +432,7 @@ int FUNCTION_NAME(FILE* fp, const CHAR_TYPE* fmt0, va_list ap) {
break;
}
flags |= FPT;
ndig = dtoaend - cp;
ndig = dtoaend - dtoaresult;
if (ch == 'g' || ch == 'G') {
if (expt > -4 && expt <= prec) {
/* Make %[gG] smell like %[fF] */
@ -662,6 +669,7 @@ int FUNCTION_NAME(FILE* fp, const CHAR_TYPE* fmt0, va_list ap) {
} else { /* glue together f_p fragments */
if (decimal_point == nullptr) decimal_point = nl_langinfo(RADIXCHAR);
if (!expchar) { /* %[fF] or sufficiently short %[gG] */
CHAR_TYPE* end = cp + ndig;
if (expt <= 0) {
PRINT(zeroes, 1);
if (prec || flags & ALT) PRINT(decimal_point, 1);
@ -669,11 +677,11 @@ int FUNCTION_NAME(FILE* fp, const CHAR_TYPE* fmt0, va_list ap) {
/* already handled initial 0's */
prec += expt;
} else {
PRINTANDPAD(cp, dtoaend, lead, zeroes);
PRINTANDPAD(cp, end, lead, zeroes);
cp += lead;
if (prec || flags & ALT) PRINT(decimal_point, 1);
}
PRINTANDPAD(cp, dtoaend, prec, zeroes);
PRINTANDPAD(cp, end, prec, zeroes);
} else { /* %[eE] or sufficiently long %[gG] */
if (prec > 1 || flags & ALT) {
buf[0] = *cp++;

2
libc/stdio/vfscanf.cpp
View file

@ -102,7 +102,7 @@ int __svfscanf(FILE* fp, const char* fmt0, va_list ap) {
void* allocation = nullptr; // Allocated but unassigned result for %mc/%ms/%m[.
size_t capacity = 0; // Number of char/wchar_t units allocated in `allocation`.
_SET_ORIENTATION(fp, -1);
_SET_ORIENTATION(fp, ORIENT_BYTES);
nassigned = 0;
nread = 0;

19
libc/stdio/vfwprintf.cpp
View file

@ -39,7 +39,7 @@
#define CHAR_TYPE_inf L"inf"
#define CHAR_TYPE_NAN L"NAN"
#define CHAR_TYPE_nan L"nan"
#define CHAR_TYPE_ORIENTATION 1
#define CHAR_TYPE_ORIENTATION ORIENT_CHARS
#define PRINT(ptr, len) \
do { \
@ -355,10 +355,6 @@ int FUNCTION_NAME(FILE* fp, const CHAR_TYPE* fmt0, va_list ap) {
}
if (prec < 0) prec = dtoaend - dtoaresult;
if (expt == INT_MAX) ox[1] = '\0';
free(convbuf);
cp = convbuf = helpers::mbsconv(dtoaresult, -1);
if (cp == nullptr) goto error;
ndig = dtoaend - dtoaresult;
goto fp_common;
case 'e':
case 'E':
@ -395,11 +391,14 @@ int FUNCTION_NAME(FILE* fp, const CHAR_TYPE* fmt0, va_list ap) {
}
if (expt == 9999) expt = INT_MAX;
}
fp_common:
#if CHAR_TYPE_ORIENTATION == ORIENT_BYTES
cp = dtoaresult;
#else
free(convbuf);
cp = convbuf = helpers::mbsconv(dtoaresult, -1);
if (cp == nullptr) goto error;
ndig = dtoaend - dtoaresult;
fp_common:
#endif
if (signflag) sign = '-';
if (expt == INT_MAX) { /* inf or nan */
if (*cp == 'N') {
@ -412,6 +411,7 @@ int FUNCTION_NAME(FILE* fp, const CHAR_TYPE* fmt0, va_list ap) {
break;
}
flags |= FPT;
ndig = dtoaend - dtoaresult;
if (ch == 'g' || ch == 'G') {
if (expt > -4 && expt <= prec) {
/* Make %[gG] smell like %[fF] */
@ -652,6 +652,7 @@ int FUNCTION_NAME(FILE* fp, const CHAR_TYPE* fmt0, va_list ap) {
} else { /* glue together f_p fragments */
if (decimal_point == nullptr) decimal_point = nl_langinfo(RADIXCHAR);
if (!expchar) { /* %[fF] or sufficiently short %[gG] */
CHAR_TYPE* end = cp + ndig;
if (expt <= 0) {
PRINT(zeroes, 1);
if (prec || flags & ALT) PRINT(decimal_point, 1);
@ -659,11 +660,11 @@ int FUNCTION_NAME(FILE* fp, const CHAR_TYPE* fmt0, va_list ap) {
/* already handled initial 0's */
prec += expt;
} else {
PRINTANDPAD(cp, convbuf + ndig, lead, zeroes);
PRINTANDPAD(cp, end, lead, zeroes);
cp += lead;
if (prec || flags & ALT) PRINT(decimal_point, 1);
}
PRINTANDPAD(cp, convbuf + ndig, prec, zeroes);
PRINTANDPAD(cp, end, prec, zeroes);
} else { /* %[eE] or sufficiently long %[gG] */
if (prec > 1 || flags & ALT) {
buf[0] = *cp++;

2
libc/stdio/vfwscanf.cpp
View file

@ -150,7 +150,7 @@ int __vfwscanf(FILE* __restrict fp, const wchar_t* __restrict fmt, __va_list ap)
char mbbuf[MB_LEN_MAX]; /* temporary mb. character buffer */
mbstate_t mbs;
_SET_ORIENTATION(fp, 1);
_SET_ORIENTATION(fp, ORIENT_CHARS);
nassigned = 0;
nconversions = 0;

2
tests/stdio_test.cpp
View file

@ -115,7 +115,7 @@ static void AssertFileIs(FILE* fp, const char* expected, bool is_fmemopen = fals
wchar_t buf[BUFSIZ]; \
int w = swprintf(buf, sizeof(buf), fmt __VA_OPT__(, ) __VA_ARGS__); \
EXPECT_EQ(n, w); \
EXPECT_EQ(std::wstring(expected), buf); \
EXPECT_EQ(std::wstring(expected), std::wstring(buf, w)); \
}
#define EXPECT_SWPRINTF(expected, fmt, ...) \
EXPECT_SWPRINTF_N(expected, static_cast<int>(wcslen(expected)), fmt __VA_OPT__(, ) __VA_ARGS__)