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-rw-r--r--libc/misc/wchar/Makefile29
-rw-r--r--libc/misc/wchar/wchar.c76
-rw-r--r--libc/misc/wchar/wstdio.c542
3 files changed, 626 insertions, 21 deletions
diff --git a/libc/misc/wchar/Makefile b/libc/misc/wchar/Makefile
index 23a1e9bba..ddd701a6d 100644
--- a/libc/misc/wchar/Makefile
+++ b/libc/misc/wchar/Makefile
@@ -24,12 +24,27 @@
TOPDIR=../../../
include $(TOPDIR)Rules.mak
-MSRC= wchar.c
-MOBJ= btowc.o wctob.o mbsinit.o mbrlen.o mbrtowc.o wcrtomb.o mbsrtowcs.o \
- wcsrtombs.o _wchar_utf8sntowcs.o _wchar_wcstoutf8s.o \
+MSRC1= wchar.c
+MOBJ1= btowc.o wctob.o mbsinit.o mbrlen.o mbrtowc.o wcrtomb.o mbsrtowcs.o \
+ wcsrtombs.o _wchar_utf8sntowcs.o _wchar_wcsntoutf8s.o \
__mbsnrtowcs.o __wcsnrtombs.o
-OBJS=$(MOBJ)
+MSRC2= wstdio.c
+MOBJ2= fwide.o \
+ fgetwc.o getwchar.o fgetws.o \
+ fputwc.o putwchar.o fputws.o \
+ ungetwc.o
+# getwc (fgetwc alias) getwc_unlocked (fgetwc_unlocked alias)
+# putwc (fputwc alias) putwc_unlocked (fputwc_unlocked alias)
+
+# wcwidth wcswidth
+# wcstod wcstof wcstold
+# wcstol wcstoul wcstoq wcstouq wcstoll wcstoull
+# fwprintf wprintf swprintf vfwprintf vwprintf vswprintf
+# fwscanf wscanf swscanf vfwscanf vwscanf vswscanf
+# wcsftime
+
+OBJS=$(MOBJ1) $(MOBJ2)
all: $(OBJS) $(LIBC)
@@ -38,7 +53,11 @@ $(LIBC): ar-target
ar-target: $(OBJS)
$(AR) $(ARFLAGS) $(LIBC) $(OBJS)
-$(MOBJ): $(MSRC)
+$(MOBJ1): $(MSRC1)
+ $(CC) $(CFLAGS) -DL_$* $< -c -o $*.o
+ $(STRIPTOOL) -x -R .note -R .comment $*.o
+
+$(MOBJ2): $(MSRC2)
$(CC) $(CFLAGS) -DL_$* $< -c -o $*.o
$(STRIPTOOL) -x -R .note -R .comment $*.o
diff --git a/libc/misc/wchar/wchar.c b/libc/misc/wchar/wchar.c
index f2d9f4a7d..9f08f3312 100644
--- a/libc/misc/wchar/wchar.c
+++ b/libc/misc/wchar/wchar.c
@@ -50,6 +50,14 @@
* an issue for uClibc, but may be for ELKS. I'm currently not sure
* if I'll use 16-bit, 32-bit, or configureable wchars in ELKS.
*
+ * July 1, 2002
+ *
+ * Fixed _wchar_utf8sntowcs() for the max number of wchars == 0 case.
+ * Fixed nul-char bug in btowc(), and another in __mbsnrtowcs() for 8-bit
+ * locales.
+ * Enabled building of a C/POSIX-locale-only version, so full locale support
+ * no longer needs to be enabled.
+ *
* Manuel
*/
@@ -66,7 +74,17 @@
#include <locale.h>
#include <wchar.h>
+#ifdef __UCLIBC_HAS_LOCALE__
#define ENCODING (__global_locale.encoding)
+#warning implement __CTYPE_HAS_UTF_8_LOCALES!
+#define __CTYPE_HAS_UTF_8_LOCALES
+#else
+#define ENCODING (__ctype_encoding_7_bit)
+#undef __CTYPE_HAS_8_BIT_LOCALES
+#undef __CTYPE_HAS_UTF_8_LOCALES
+#undef L__wchar_utf8sntowcs
+#undef L__wchar_wcsntoutf8s
+#endif
#if WCHAR_MAX > 0xffffU
#define UTF_8_MAX_LEN 6
@@ -76,9 +94,6 @@
/* #define KUHN */
-#warning implement __CTYPE_HAS_UTF_8_LOCALES!
-#define __CTYPE_HAS_UTF_8_LOCALES
-
/* Implementation-specific work functions. */
extern size_t _wchar_utf8sntowcs(wchar_t *__restrict pwc, size_t wn,
@@ -103,6 +118,8 @@ extern size_t __wcsnrtombs(char *__restrict dst,
wint_t btowc(int c)
{
+#ifdef __CTYPE_HAS_8_BIT_LOCALES
+
wchar_t wc;
unsigned char buf[1];
mbstate_t mbstate;
@@ -110,11 +127,19 @@ wint_t btowc(int c)
if (c != EOF) {
*buf = (unsigned char) c;
mbstate.mask = 0; /* Initialize the mbstate. */
- if (mbrtowc(&wc, buf, 1, &mbstate) == 1) {
+ if (mbrtowc(&wc, buf, 1, &mbstate) <= 1) {
return wc;
}
}
return WEOF;
+
+#else /* __CTYPE_HAS_8_BIT_LOCALES */
+
+ /* If we don't have 8-bit locale support, then this is trivial since
+ * anything outside of 0-0x7f is illegal in C/POSIX and UTF-8 locales. */
+ return (((unsigned int)c) < 0x80) ? c : WEOF;
+
+#endif /* __CTYPE_HAS_8_BIT_LOCALES */
}
#endif
@@ -125,9 +150,22 @@ wint_t btowc(int c)
int wctob(wint_t c)
{
+#ifdef __CTYPE_HAS_8_BIT_LOCALES
+
unsigned char buf[MB_LEN_MAX];
return (wcrtomb(buf, c, NULL) == 1) ? *buf : EOF;
+
+#else /* __CTYPE_HAS_8_BIT_LOCALES */
+
+ /* If we don't have 8-bit locale support, then this is trivial since
+ * anything outside of 0-0x7f is illegal in C/POSIX and UTF-8 locales. */
+
+ /* TODO: need unsigned version of wint_t... */
+/* return (((unsigned int)c) < 0x80) ? c : WEOF; */
+ return ((c >= 0) && (c < 0x80)) ? c : EOF;
+
+#endif /* __CTYPE_HAS_8_BIT_LOCALES */
}
#endif
@@ -144,6 +182,9 @@ int mbsinit(const mbstate_t *ps)
#ifdef L_mbrlen
size_t mbrlen(const char *__restrict s, size_t n, mbstate_t *__restrict ps)
+ __attribute__ ((__weak__, __alias__("__mbrlen")));
+
+size_t __mbrlen(const char *__restrict s, size_t n, mbstate_t *__restrict ps)
{
static mbstate_t mbstate; /* Rely on bss 0-init. */
@@ -183,7 +224,7 @@ size_t mbrtowc(wchar_t *__restrict pwc, const char *__restrict s,
/* Need to do this here since mbsrtowcs doesn't allow incompletes. */
if (ENCODING == __ctype_encoding_utf8) {
r = _wchar_utf8sntowcs(pwc, 1, &p, n, ps, 1);
- return (r == 1) ? (p-s) : r;
+ return (r == 1) ? (p-s) : r; /* Need to return 0 if nul char. */
}
#endif
@@ -289,10 +330,13 @@ size_t _wchar_utf8sntowcs(wchar_t *__restrict pwc, size_t wn,
wn = SIZE_MAX;
incr = 0;
}
-#warning fix _wchar_utf8sntowcs to allow wn == 0!
- assert(wn > 0); /* TODO: fix this!! */
- count = wn;
+ /* This is really here only to support the glibc extension function
+ * __mbsnrtowcs which apparently returns 0 if wn == 0 without any
+ * check on the validity of the mbstate. */
+ if (!(count = wn)) {
+ return 0;
+ }
if ((mask = (__uwchar_t) ps->mask) != 0) { /* A continuation... */
#ifdef DECODER
@@ -420,7 +464,7 @@ size_t _wchar_utf8sntowcs(wchar_t *__restrict pwc, size_t wn,
#endif
/**********************************************************************/
-#ifdef L__wchar_wcstoutf8s
+#ifdef L__wchar_wcsntoutf8s
size_t _wchar_wcsntoutf8s(char *__restrict s, size_t n,
const wchar_t **__restrict src, size_t wn)
@@ -568,13 +612,13 @@ size_t __mbsnrtowcs(wchar_t *__restrict dst, const char **__restrict src,
if (!wc) {
goto BAD;
}
- } else if (!wc) {
+ }
+ if (!(*dst = wc)) {
s = NULL;
break;
}
- ++s;
- *dst = wc;
dst += incr;
+ ++s;
--count;
}
if (dst != wcbuf) {
@@ -633,7 +677,7 @@ size_t __wcsnrtombs(char *__restrict dst, const wchar_t **__restrict src,
if (ENCODING == __ctype_encoding_utf8) {
return _wchar_wcsntoutf8s(dst, len, src, NWC);
}
-#endif
+#endif /* __CTYPE_HAS_UTF_8_LOCALES */
incr = 1;
if (!dst) {
@@ -676,12 +720,12 @@ size_t __wcsnrtombs(char *__restrict dst, const wchar_t **__restrict src,
/* #define __WCHAR_REPLACEMENT_CHAR '?' */
#ifdef __WCHAR_REPLACEMENT_CHAR
*dst = (unsigned char) ( u ? u : __WCHAR_REPLACEMENT_CHAR );
-#else
+#else /* __WCHAR_REPLACEMENT_CHAR */
if (!u) {
goto BAD;
}
*dst = (unsigned char) u;
-#endif
+#endif /* __WCHAR_REPLACEMENT_CHAR */
}
++s;
dst += incr;
@@ -692,7 +736,7 @@ size_t __wcsnrtombs(char *__restrict dst, const wchar_t **__restrict src,
}
return len - count;
}
-#endif
+#endif /* __CTYPE_HAS_8_BIT_LOCALES */
assert(ENCODING == __ctype_encoding_7_bit);
diff --git a/libc/misc/wchar/wstdio.c b/libc/misc/wchar/wstdio.c
new file mode 100644
index 000000000..79cf1dfa1
--- /dev/null
+++ b/libc/misc/wchar/wstdio.c
@@ -0,0 +1,542 @@
+
+/*
+ * ANSI/ISO C99 says
+
+ 9 Although both text and binary wide­oriented streams are conceptually sequences of wide
+ characters, the external file associated with a wide­oriented stream is a sequence of
+ multibyte characters, generalized as follows:
+ --- Multibyte encodings within files may contain embedded null bytes (unlike multibyte
+ encodings valid for use internal to the program).
+ --- A file need not begin nor end in the initial shift state. 225)
+
+ * How do we deal with this?
+
+ * Should auto_wr_transition init the mbstate object?
+*/
+
+
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <wchar.h>
+#include <limits.h>
+#include <errno.h>
+#include <assert.h>
+
+#ifndef __STDIO_THREADSAFE
+
+#ifdef __BCC__
+#define UNLOCKED_STREAM(RETURNTYPE,NAME,PARAMS,ARGS,STREAM) \
+asm(".text\nexport _" "NAME" "_unlocked\n_" "NAME" "_unlocked = _" "NAME"); \
+RETURNTYPE NAME PARAMS
+#else
+#define UNLOCKED_STREAM(RETURNTYPE,NAME,PARAMS,ARGS,STREAM) \
+strong_alias(NAME,NAME##_unlocked) \
+RETURNTYPE NAME PARAMS
+#endif
+
+#define UNLOCKED(RETURNTYPE,NAME,PARAMS,ARGS) \
+ UNLOCKED_STREAM(RETURNTYPE,NAME,PARAMS,ARGS,stream)
+
+#ifdef __BCC__
+#define UNLOCKED_VOID_RETURN(NAME,PARAMS,ARGS) \
+asm(".text\nexport _" "NAME" "_unlocked\n_" "NAME" "_unlocked = _" "NAME"); \
+void NAME PARAMS
+#else
+#define UNLOCKED_VOID_RETURN(NAME,PARAMS,ARGS) \
+strong_alias(NAME,NAME##_unlocked) \
+void NAME PARAMS
+#endif
+
+#define __STDIO_THREADLOCK_OPENLIST
+#define __STDIO_THREADUNLOCK_OPENLIST
+
+#else /* __STDIO_THREADSAFE */
+
+#include <pthread.h>
+
+#define UNLOCKED_STREAM(RETURNTYPE,NAME,PARAMS,ARGS,STREAM) \
+RETURNTYPE NAME PARAMS \
+{ \
+ RETURNTYPE retval; \
+ __STDIO_THREADLOCK(STREAM); \
+ retval = NAME##_unlocked ARGS ; \
+ __STDIO_THREADUNLOCK(STREAM); \
+ return retval; \
+} \
+RETURNTYPE NAME##_unlocked PARAMS
+
+#define UNLOCKED(RETURNTYPE,NAME,PARAMS,ARGS) \
+ UNLOCKED_STREAM(RETURNTYPE,NAME,PARAMS,ARGS,stream)
+
+#define UNLOCKED_VOID_RETURN(NAME,PARAMS,ARGS) \
+void NAME PARAMS \
+{ \
+ __STDIO_THREADLOCK(stream); \
+ NAME##_unlocked ARGS ; \
+ __STDIO_THREADUNLOCK(stream); \
+} \
+void NAME##_unlocked PARAMS
+
+#define __STDIO_THREADLOCK_OPENLIST \
+ pthread_mutex_lock(&_stdio_openlist_lock)
+
+#define __STDIO_THREADUNLOCK_OPENLIST \
+ pthread_mutex_unlock(&_stdio_openlist_lock)
+
+#define __STDIO_THREADTRYLOCK_OPENLIST \
+ pthread_mutex_trylock(&_stdio_openlist_lock)
+
+#endif /* __STDIO_THREADSAFE */
+
+#ifndef __STDIO_BUFFERS
+#error stdio buffers are currently required for wide i/o
+#endif
+
+/**********************************************************************/
+#ifdef L_fwide
+
+/* TODO: According to SUSv3 should return EBADF if invalid stream. */
+
+int fwide(register FILE *stream, int mode)
+{
+ __STDIO_THREADLOCK(stream);
+
+ if (mode && !(stream->modeflags & (__FLAG_WIDE|__FLAG_NARROW))) {
+ stream->modeflags |= ((mode > 0) ? __FLAG_WIDE : __FLAG_NARROW);
+ }
+
+ mode = (stream->modeflags & __FLAG_WIDE)
+ - (stream->modeflags & __FLAG_NARROW);
+
+ __STDIO_THREADUNLOCK(stream);
+
+ return mode;
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_fgetwc
+
+static void munge_stream(register FILE *stream, unsigned char *buf)
+{
+#ifdef __STDIO_GETC_MACRO
+ stream->bufgetc =
+#endif
+#ifdef __STDIO_PUTC_MACRO
+ stream->bufputc =
+#endif
+ stream->bufpos = stream->bufread = stream->bufend = stream->bufstart = buf;
+}
+
+UNLOCKED(wint_t,fgetwc,(register FILE *stream),(stream))
+{
+ wint_t wi;
+ wchar_t wc[1];
+ int n;
+ size_t r;
+ unsigned char c[1];
+ unsigned char sbuf[1];
+ unsigned char ungot_width; /* Support ftell after wscanf ungetwc. */
+
+ wi = WEOF; /* Prepare for failure. */
+
+ if (stream->modeflags & __FLAG_NARROW) {
+ stream->modeflags |= __FLAG_ERROR;
+ __set_errno(EBADF);
+ goto DONE;
+ }
+ stream->modeflags |= __FLAG_WIDE;
+
+ if (stream->modeflags & __MASK_UNGOT) {/* Any ungetwc()s? */
+ assert( (stream->modeflags & (__FLAG_READING|__FLAG_ERROR))
+ == __FLAG_READING);
+ wi = stream->ungot[(--stream->modeflags) & __MASK_UNGOT];
+ stream->ungot[1] = 0;
+ goto DONE;
+ }
+
+ if (!stream->bufstart) { /* Ugh... stream isn't buffered! */
+ /* Munge the stream temporarily to use a 1-byte buffer. */
+ munge_stream(stream, sbuf);
+ ++stream->bufend;
+ }
+
+ ungot_width = 0;
+
+ LOOP:
+ if ((n = stream->bufread - stream->bufpos) == 0) {
+ goto FILL_BUFFER;
+ }
+
+ r = mbrtowc(wc, stream->bufpos, n, &stream->state);
+ if (((ssize_t) r) >= 0) { /* Single byte... */
+ if (r == 0) { /* Nul wide char... means 0 byte for us so */
+ ++r; /* increment r and handle below as single. */
+ }
+ stream->bufpos += r;
+ stream->ungot_width[0] = ungot_width + r;
+ wi = *wc;
+ goto DONE;
+ }
+
+ if (r == ((size_t) -2)) {
+ /* Potentially valid but incomplete and no more buffered. */
+ stream->bufpos += n; /* Update bufpos for stream. */
+ ungot_width += n;
+ FILL_BUFFER:
+ if (_stdio_fread(c, (size_t) 1, stream) > 0) {
+ assert(stream->bufpos == stream->bufstart + 1);
+ *--stream->bufpos = *c; /* Insert byte into buffer. */
+ goto LOOP;
+ }
+ if (!__FERROR(stream)) { /* EOF with no error. */
+ if (!stream->state.mask) { /* No partially complete wchar. */
+ goto DONE;
+ }
+ /* EOF but partially complete wchar. */
+ /* TODO: should EILSEQ be set? */
+ __set_errno(EILSEQ);
+ }
+ }
+
+ /* If we reach here, either r == ((size_t)-1) and mbrtowc set errno
+ * to EILSEQ, or r == ((size_t)-2) and stream is in an error state
+ * or at EOF with a partially complete wchar. Make sure stream's
+ * error indicator is set. */
+ stream->modeflags |= __FLAG_ERROR;
+
+ DONE:
+ if (stream->bufstart == sbuf) { /* Need to un-munge the stream. */
+ munge_stream(stream, NULL);
+ }
+
+ return wi;
+}
+
+strong_alias(fgetwc_unlocked,getwc_unlocked);
+strong_alias(fgetwc,getwc);
+
+#endif
+/**********************************************************************/
+#ifdef L_getwchar
+
+UNLOCKED_STREAM(wint_t,getwchar,(void),(),stdin)
+{
+ register FILE *stream = stdin; /* This helps bcc optimize. */
+
+ return fgetwc_unlocked(stream);
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_fgetws
+
+UNLOCKED(wchar_t *,fgetws,(wchar_t *__restrict ws, int n,
+ FILE *__restrict stream),(ws, n, stream))
+{
+ register wchar_t *p = ws;
+ wint_t wi;
+
+ while ((n > 1)
+ && ((wi = fgetwc_unlocked(stream)) != WEOF)
+ && ((*p++ = wi) != '\n')
+ ) {
+ --n;
+ }
+ if (p == ws) {
+ /* TODO -- should we set errno? */
+/* if (n <= 0) { */
+/* errno = EINVAL; */
+/* } */
+ return NULL;
+ }
+ *p = 0;
+ return ws;
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_fputwc
+
+UNLOCKED(wint_t,fputwc,(wchar_t wc, FILE *stream),(wc, stream))
+{
+#if 0
+ size_t r;
+ char buf[MB_LEN_MAX];
+
+ if (stream->modeflags & __FLAG_NARROW) {
+ stream->modeflags |= __FLAG_ERROR;
+ __set_errno(EBADF);
+ return WEOF;
+ }
+ stream->modeflags |= __FLAG_WIDE;
+
+ /* TODO:
+ * If stream is in reading state with bad mbstate object, what to do?
+ * Should we check the state first? Should we check error indicator?
+ * Should we check reading or even read-only?
+ */
+ /* It looks like the only ANSI/ISO C99 - blessed way of manipulating
+ * the stream's mbstate object is through fgetpos/fsetpos. */
+ r = wcrtomb(buf, wc, &stream->state);
+
+ return (r != ((size_t) -1) && (r == _stdio_fwrite(buf, r, stream)))
+ ? wc : WEOF;
+
+#elif 0
+
+ /* this is broken if wc == 0 !!! */
+ wchar_t wbuf[2];
+
+ wbuf[0] = wc;
+ wbuf[1] = 0;
+
+ return (fputws_unlocked(wbuf, stream) > 0) ? wc : WEOF;
+
+#else
+
+ size_t n;
+ char buf[MB_LEN_MAX];
+
+ if (stream->modeflags & __FLAG_NARROW) {
+ stream->modeflags |= __FLAG_ERROR;
+ __set_errno(EBADF);
+ return WEOF;
+ }
+ stream->modeflags |= __FLAG_WIDE;
+
+ return (((n = wcrtomb(buf, wc, &stream->state)) != ((size_t)-1)) /* EILSEQ */
+ && (_stdio_fwrite(buf, n, stream) != n))/* Didn't write everything. */
+ ? wc : WEOF;
+
+#endif
+}
+
+strong_alias(fputwc_unlocked,putwc_unlocked);
+strong_alias(fputwc,putwc);
+
+#endif
+/**********************************************************************/
+#ifdef L_putwchar
+
+UNLOCKED_STREAM(wint_t,putwchar,(wchar_t wc),(wc),stdout)
+{
+ register FILE *stream = stdout; /* This helps bcc optimize. */
+
+ return fputwc_unlocked(wc, stream);
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_fputws
+
+UNLOCKED(int,fputws,(const wchar_t *__restrict ws,
+ register FILE *__restrict stream),(ws, stream))
+{
+#if 1
+ size_t n;
+ char buf[64];
+
+ if (stream->modeflags & __FLAG_NARROW) {
+ stream->modeflags |= __FLAG_ERROR;
+ __set_errno(EBADF);
+ return -1;
+ }
+ stream->modeflags |= __FLAG_WIDE;
+
+ while ((n = wcsrtombs(buf, &ws, sizeof(buf), &stream->state)) != 0) {
+ /* Wasn't an empty wide string. */
+ if ((n == ((size_t) -1))/* Encoding error! */
+ || (_stdio_fwrite(buf, n, stream) != n)/* Didn't write everything. */
+ ) {
+ return -1;
+ }
+ if (!ws) { /* Done? */
+ break;
+ }
+ }
+
+ return 1;
+
+
+
+
+#elif 1
+ int result;
+ size_t n;
+ size_t len;
+ register char *s;
+ unsigned char *bufend;
+ char sbuf[MB_LEN_MAX];
+
+ if (stream->modeflags & __FLAG_NARROW) {
+ RETURN_BADF:
+ stream->modeflags |= __FLAG_ERROR;
+ __set_errno(EBADF);
+ return -1;
+ }
+ stream->modeflags |= __FLAG_WIDE;
+
+ /* Note: What follows is setup grabbed from _stdio_fwrite and modified
+ * slightly. Since this is a wide stream, we can ignore bufgetc and
+ * bufputc if present. They always == bufstart.
+ * It is unfortunate that we need to duplicate so much code here, but
+ * we need to do the stream setup before starting the wc->mb conversion. */
+
+ if ((stream->modeflags & __FLAG_READONLY)
+#ifndef __STDIO_AUTO_RW_TRANSITION
+ /* ANSI/ISO requires either at EOF or currently not reading. */
+ || ((stream->modeflags & (__FLAG_READING|__FLAG_EOF))
+ == __FLAG_READING)
+#endif /* __STDIO_AUTO_RW_TRANSITION */
+ ) {
+ /* TODO: This is for posix behavior if readonly. To save space, we
+ * use this errno for write attempt while reading, as no errno is
+ * specified by posix for this case, even though the restriction is
+ * mentioned in fopen(). */
+ goto RETURN_BADF;
+ }
+
+#ifdef __STDIO_AUTO_RW_TRANSITION
+ /* If reading, deal with ungots and read-buffered chars. */
+ if (stream->modeflags & __FLAG_READING) {
+ if (((stream->bufpos < stream->bufread)
+ || (stream->modeflags & __MASK_UNGOT))
+ /* If appending, we might as well seek to end to save a seek. */
+ /* TODO: set EOF in fseek when appropriate? */
+ && fseek(stream, 0L,
+ ((stream->modeflags & __FLAG_APPEND)
+ ? SEEK_END : SEEK_CUR))
+ ) {
+ /* Note: This differs from glibc's apparent behavior of
+ not setting the error flag and discarding the buffered
+ read data. */
+ stream->modeflags |= __FLAG_ERROR; /* fseek may not set this. */
+ return -1; /* Fail if we need to fseek but can't. */
+ }
+ /* Always reset even if fseek called (saves a test). */
+ stream->bufpos = stream->bufread = stream->bufstart;
+ stream->modeflags &= ~__FLAG_READING;
+ }
+#endif
+
+ /* Ok, the boilerplate from _stdio_fwrite is done. */
+
+ if (stream->bufpos > stream->bufstart) { /* Pending writes.. */
+ /* This is a performance penalty, but it simplifies the code below.
+ * If this is removed, the buffer sharing and while loop condition
+ * need to be modified below (at least). We at least save a little
+ * on the overhead by calling _stdio_fwrite directly instead of
+ * fflush_unlocked. */
+ if (_stdio_fwrite(NULL, 0, stream) > 0) {/* fflush incomplete! */
+ return -1;
+ }
+ }
+
+ stream->modeflags |= __FLAG_WRITING; /* Ensure Writing flag is set. */
+
+ /* Next, we "steal" the stream's buffer and do the wc->mb conversion
+ * straight into it. This will cause the equivalent of an fflush
+ * for each string write. :-( */
+
+ bufend = NULL;
+ s = stream->bufstart;
+
+ if ((len = stream->bufend - stream->bufstart) < MB_LEN_MAX) {
+ /* Stream is unbuffered or buffer is too small, so deactivate. */
+ bufend = stream->bufend;
+ stream->bufend = stream->bufstart;
+ s = sbuf;
+ len = MB_LEN_MAX;
+ }
+
+ result = 1; /* Assume success. */
+ while (ws && (n = wcsrtombs(s, &ws, len, &stream->state)) != 0) {
+ if ((n == ((size_t) -1)) /* Encoding error! */
+ /* TODO - maybe call write directly? but what about custom streams? */
+ || (_stdio_fwrite(s, n, stream) != n)/* Didn't write everything. */
+ ) {
+ result = -1;
+ break;
+ }
+ }
+
+ if (bufend) { /* If deactivated stream buffer, renable it. */
+ stream->bufend = bufend;
+ }
+
+ return result;
+
+#else /* slow, dumb version */
+ while (*ws) {
+ if (fputwc_unlocked(*ws, stream) == WEOF) {
+ return -1;
+ }
+ ++ws;
+ }
+ return 1;
+#endif
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_ungetwc
+/*
+ * Note: This is the application-callable ungetwc. If wscanf calls this, it
+ * should also set stream->ungot[1] to 0 if this is the only ungot.
+ */
+
+/* Reentrant. */
+
+wint_t ungetwc(wint_t c, register FILE *stream)
+{
+ __STDIO_THREADLOCK(stream);
+
+ __stdio_validate_FILE(stream); /* debugging only */
+
+ if (stream->modeflags & __FLAG_NARROW) {
+ stream->modeflags |= __FLAG_ERROR;
+ c = WEOF;
+ goto DONE;
+ }
+ stream->modeflags |= __FLAG_WIDE;
+
+ /* If can't read or there's been an error, or c == EOF, or ungot slots
+ * already filled, then return EOF */
+ if ((stream->modeflags
+ & (__MASK_UNGOT2|__FLAG_WRITEONLY
+#ifndef __STDIO_AUTO_RW_TRANSITION
+ |__FLAG_WRITING /* Note: technically no, but yes in spirit */
+#endif /* __STDIO_AUTO_RW_TRANSITION */
+ ))
+ || ((stream->modeflags & __MASK_UNGOT1) && (stream->ungot[1]))
+ || (c == WEOF) ) {
+ c = WEOF;
+ goto DONE;;
+ }
+
+/* ungot_width */
+
+#ifdef __STDIO_BUFFERS
+ /* TODO: shouldn't allow writing??? */
+ if (stream->modeflags & __FLAG_WRITING) {
+ fflush_unlocked(stream); /* Commit any write-buffered chars. */
+ }
+#endif /* __STDIO_BUFFERS */
+
+ /* Clear EOF and WRITING flags, and set READING FLAG */
+ stream->modeflags &= ~(__FLAG_EOF|__FLAG_WRITING);
+ stream->modeflags |= __FLAG_READING;
+ stream->ungot[1] = 1; /* Flag as app ungetc call; wscanf fixes up. */
+ stream->ungot[(stream->modeflags++) & __MASK_UNGOT] = c;
+
+ __stdio_validate_FILE(stream); /* debugging only */
+
+ DONE:
+ __STDIO_THREADUNLOCK(stream);
+
+ return c;
+}
+
+#endif
+/**********************************************************************/
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 13:17:11 +0000