/* Word-wrapping and line-truncating streams
|
/* Word-wrapping and line-truncating streams
|
Copyright (C) 1997, 1998, 1999, 2001 Free Software Foundation, Inc.
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Copyright (C) 1997, 1998, 1999, 2001 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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This file is part of the GNU C Library.
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Written by Miles Bader <miles@gnu.ai.mit.edu>.
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Written by Miles Bader <miles@gnu.ai.mit.edu>.
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|
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The GNU C Library is free software; you can redistribute it and/or
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The GNU C Library is free software; you can redistribute it and/or
|
modify it under the terms of the GNU Lesser General Public
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modify it under the terms of the GNU Lesser General Public
|
License as published by the Free Software Foundation; either
|
License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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version 2.1 of the License, or (at your option) any later version.
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|
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The GNU C Library is distributed in the hope that it will be useful,
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The GNU C Library is distributed in the hope that it will be useful,
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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Lesser General Public License for more details.
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|
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You should have received a copy of the GNU Lesser General Public
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You should have received a copy of the GNU Lesser General Public
|
License along with the GNU C Library; if not, write to the Free
|
License along with the GNU C Library; if not, write to the Free
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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02111-1307 USA. */
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|
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/* This package emulates glibc `line_wrap_stream' semantics for systems that
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/* This package emulates glibc `line_wrap_stream' semantics for systems that
|
don't have that. */
|
don't have that. */
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|
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#ifdef HAVE_CONFIG_H
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#include <config.h>
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#endif
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#endif
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|
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#include <stdlib.h>
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#include <stdlib.h>
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#include <string.h>
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#include <string.h>
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#include <errno.h>
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#include <errno.h>
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#include <stdarg.h>
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#include <stdarg.h>
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#include <ctype.h>
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#include <ctype.h>
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|
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#include "argp-fmtstream.h"
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#include "argp-fmtstream.h"
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#include "argp-namefrob.h"
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#include "argp-namefrob.h"
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|
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#ifndef ARGP_FMTSTREAM_USE_LINEWRAP
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#ifndef ARGP_FMTSTREAM_USE_LINEWRAP
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|
|
#ifndef isblank
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#ifndef isblank
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#define isblank(ch) ((ch)==' ' || (ch)=='\t')
|
#define isblank(ch) ((ch)==' ' || (ch)=='\t')
|
#endif
|
#endif
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|
|
#if defined _LIBC && defined USE_IN_LIBIO
|
#if defined _LIBC && defined USE_IN_LIBIO
|
# include <wchar.h>
|
# include <wchar.h>
|
# include <libio/libioP.h>
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# include <libio/libioP.h>
|
# define __vsnprintf(s, l, f, a) _IO_vsnprintf (s, l, f, a)
|
# define __vsnprintf(s, l, f, a) _IO_vsnprintf (s, l, f, a)
|
#endif
|
#endif
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|
|
#define INIT_BUF_SIZE 200
|
#define INIT_BUF_SIZE 200
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#define PRINTF_SIZE_GUESS 150
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#define PRINTF_SIZE_GUESS 150
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|
|
/* Return an argp_fmtstream that outputs to STREAM, and which prefixes lines
|
/* Return an argp_fmtstream that outputs to STREAM, and which prefixes lines
|
written on it with LMARGIN spaces and limits them to RMARGIN columns
|
written on it with LMARGIN spaces and limits them to RMARGIN columns
|
total. If WMARGIN >= 0, words that extend past RMARGIN are wrapped by
|
total. If WMARGIN >= 0, words that extend past RMARGIN are wrapped by
|
replacing the whitespace before them with a newline and WMARGIN spaces.
|
replacing the whitespace before them with a newline and WMARGIN spaces.
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Otherwise, chars beyond RMARGIN are simply dropped until a newline.
|
Otherwise, chars beyond RMARGIN are simply dropped until a newline.
|
Returns NULL if there was an error. */
|
Returns NULL if there was an error. */
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argp_fmtstream_t
|
argp_fmtstream_t
|
__argp_make_fmtstream (FILE *stream,
|
__argp_make_fmtstream (FILE *stream,
|
size_t lmargin, size_t rmargin, ssize_t wmargin)
|
size_t lmargin, size_t rmargin, ssize_t wmargin)
|
{
|
{
|
argp_fmtstream_t fs;
|
argp_fmtstream_t fs;
|
|
|
fs = (struct argp_fmtstream *) malloc (sizeof (struct argp_fmtstream));
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fs = (struct argp_fmtstream *) malloc (sizeof (struct argp_fmtstream));
|
if (fs != NULL)
|
if (fs != NULL)
|
{
|
{
|
fs->stream = stream;
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fs->stream = stream;
|
|
|
fs->lmargin = lmargin;
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fs->lmargin = lmargin;
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fs->rmargin = rmargin;
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fs->rmargin = rmargin;
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fs->wmargin = wmargin;
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fs->wmargin = wmargin;
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fs->point_col = 0;
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fs->point_col = 0;
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fs->point_offs = 0;
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fs->point_offs = 0;
|
|
|
fs->buf = (char *) malloc (INIT_BUF_SIZE);
|
fs->buf = (char *) malloc (INIT_BUF_SIZE);
|
if (! fs->buf)
|
if (! fs->buf)
|
{
|
{
|
free (fs);
|
free (fs);
|
fs = 0;
|
fs = 0;
|
}
|
}
|
else
|
else
|
{
|
{
|
fs->p = fs->buf;
|
fs->p = fs->buf;
|
fs->end = fs->buf + INIT_BUF_SIZE;
|
fs->end = fs->buf + INIT_BUF_SIZE;
|
}
|
}
|
}
|
}
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|
|
return fs;
|
return fs;
|
}
|
}
|
#ifdef weak_alias
|
#ifdef weak_alias
|
weak_alias (__argp_make_fmtstream, argp_make_fmtstream)
|
weak_alias (__argp_make_fmtstream, argp_make_fmtstream)
|
#endif
|
#endif
|
|
|
/* Flush FS to its stream, and free it (but don't close the stream). */
|
/* Flush FS to its stream, and free it (but don't close the stream). */
|
void
|
void
|
__argp_fmtstream_free (argp_fmtstream_t fs)
|
__argp_fmtstream_free (argp_fmtstream_t fs)
|
{
|
{
|
__argp_fmtstream_update (fs);
|
__argp_fmtstream_update (fs);
|
if (fs->p > fs->buf)
|
if (fs->p > fs->buf)
|
{
|
{
|
#ifdef USE_IN_LIBIO
|
#ifdef USE_IN_LIBIO
|
if (_IO_fwide (fs->stream, 0) > 0)
|
if (_IO_fwide (fs->stream, 0) > 0)
|
__fwprintf (fs->stream, L"%.*s", (int) (fs->p - fs->buf), fs->buf);
|
__fwprintf (fs->stream, L"%.*s", (int) (fs->p - fs->buf), fs->buf);
|
else
|
else
|
#endif
|
#endif
|
fwrite (fs->buf, 1, fs->p - fs->buf, fs->stream);
|
fwrite (fs->buf, 1, fs->p - fs->buf, fs->stream);
|
}
|
}
|
free (fs->buf);
|
free (fs->buf);
|
free (fs);
|
free (fs);
|
}
|
}
|
#ifdef weak_alias
|
#ifdef weak_alias
|
weak_alias (__argp_fmtstream_free, argp_fmtstream_free)
|
weak_alias (__argp_fmtstream_free, argp_fmtstream_free)
|
#endif
|
#endif
|
|
|
/* Process FS's buffer so that line wrapping is done from POINT_OFFS to the
|
/* Process FS's buffer so that line wrapping is done from POINT_OFFS to the
|
end of its buffer. This code is mostly from glibc stdio/linewrap.c. */
|
end of its buffer. This code is mostly from glibc stdio/linewrap.c. */
|
void
|
void
|
__argp_fmtstream_update (argp_fmtstream_t fs)
|
__argp_fmtstream_update (argp_fmtstream_t fs)
|
{
|
{
|
char *buf, *nl;
|
char *buf, *nl;
|
size_t len;
|
size_t len;
|
|
|
/* Scan the buffer for newlines. */
|
/* Scan the buffer for newlines. */
|
buf = fs->buf + fs->point_offs;
|
buf = fs->buf + fs->point_offs;
|
while (buf < fs->p)
|
while (buf < fs->p)
|
{
|
{
|
size_t r;
|
size_t r;
|
|
|
if (fs->point_col == 0 && fs->lmargin != 0)
|
if (fs->point_col == 0 && fs->lmargin != 0)
|
{
|
{
|
/* We are starting a new line. Print spaces to the left margin. */
|
/* We are starting a new line. Print spaces to the left margin. */
|
const size_t pad = fs->lmargin;
|
const size_t pad = fs->lmargin;
|
if (fs->p + pad < fs->end)
|
if (fs->p + pad < fs->end)
|
{
|
{
|
/* We can fit in them in the buffer by moving the
|
/* We can fit in them in the buffer by moving the
|
buffer text up and filling in the beginning. */
|
buffer text up and filling in the beginning. */
|
memmove (buf + pad, buf, fs->p - buf);
|
memmove (buf + pad, buf, fs->p - buf);
|
fs->p += pad; /* Compensate for bigger buffer. */
|
fs->p += pad; /* Compensate for bigger buffer. */
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memset (buf, ' ', pad); /* Fill in the spaces. */
|
memset (buf, ' ', pad); /* Fill in the spaces. */
|
buf += pad; /* Don't bother searching them. */
|
buf += pad; /* Don't bother searching them. */
|
}
|
}
|
else
|
else
|
{
|
{
|
/* No buffer space for spaces. Must flush. */
|
/* No buffer space for spaces. Must flush. */
|
size_t i;
|
size_t i;
|
for (i = 0; i < pad; i++)
|
for (i = 0; i < pad; i++)
|
{
|
{
|
#ifdef USE_IN_LIBIO
|
#ifdef USE_IN_LIBIO
|
if (_IO_fwide (fs->stream, 0) > 0)
|
if (_IO_fwide (fs->stream, 0) > 0)
|
putwc_unlocked (L' ', fs->stream);
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putwc_unlocked (L' ', fs->stream);
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else
|
else
|
#endif
|
#endif
|
putc_unlocked (' ', fs->stream);
|
putc_unlocked (' ', fs->stream);
|
}
|
}
|
}
|
}
|
fs->point_col = pad;
|
fs->point_col = pad;
|
}
|
}
|
|
|
len = fs->p - buf;
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len = fs->p - buf;
|
nl = memchr (buf, '\n', len);
|
nl = memchr (buf, '\n', len);
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|
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if (fs->point_col < 0)
|
if (fs->point_col < 0)
|
fs->point_col = 0;
|
fs->point_col = 0;
|
|
|
if (!nl)
|
if (!nl)
|
{
|
{
|
/* The buffer ends in a partial line. */
|
/* The buffer ends in a partial line. */
|
|
|
if (fs->point_col + len < fs->rmargin)
|
if (fs->point_col + len < fs->rmargin)
|
{
|
{
|
/* The remaining buffer text is a partial line and fits
|
/* The remaining buffer text is a partial line and fits
|
within the maximum line width. Advance point for the
|
within the maximum line width. Advance point for the
|
characters to be written and stop scanning. */
|
characters to be written and stop scanning. */
|
fs->point_col += len;
|
fs->point_col += len;
|
break;
|
break;
|
}
|
}
|
else
|
else
|
/* Set the end-of-line pointer for the code below to
|
/* Set the end-of-line pointer for the code below to
|
the end of the buffer. */
|
the end of the buffer. */
|
nl = fs->p;
|
nl = fs->p;
|
}
|
}
|
else if (fs->point_col + (nl - buf) < (ssize_t) fs->rmargin)
|
else if (fs->point_col + (nl - buf) < (ssize_t) fs->rmargin)
|
{
|
{
|
/* The buffer contains a full line that fits within the maximum
|
/* The buffer contains a full line that fits within the maximum
|
line width. Reset point and scan the next line. */
|
line width. Reset point and scan the next line. */
|
fs->point_col = 0;
|
fs->point_col = 0;
|
buf = nl + 1;
|
buf = nl + 1;
|
continue;
|
continue;
|
}
|
}
|
|
|
/* This line is too long. */
|
/* This line is too long. */
|
r = fs->rmargin - 1;
|
r = fs->rmargin - 1;
|
|
|
if (fs->wmargin < 0)
|
if (fs->wmargin < 0)
|
{
|
{
|
/* Truncate the line by overwriting the excess with the
|
/* Truncate the line by overwriting the excess with the
|
newline and anything after it in the buffer. */
|
newline and anything after it in the buffer. */
|
if (nl < fs->p)
|
if (nl < fs->p)
|
{
|
{
|
memmove (buf + (r - fs->point_col), nl, fs->p - nl);
|
memmove (buf + (r - fs->point_col), nl, fs->p - nl);
|
fs->p -= buf + (r - fs->point_col) - nl;
|
fs->p -= buf + (r - fs->point_col) - nl;
|
/* Reset point for the next line and start scanning it. */
|
/* Reset point for the next line and start scanning it. */
|
fs->point_col = 0;
|
fs->point_col = 0;
|
buf += r + 1; /* Skip full line plus \n. */
|
buf += r + 1; /* Skip full line plus \n. */
|
}
|
}
|
else
|
else
|
{
|
{
|
/* The buffer ends with a partial line that is beyond the
|
/* The buffer ends with a partial line that is beyond the
|
maximum line width. Advance point for the characters
|
maximum line width. Advance point for the characters
|
written, and discard those past the max from the buffer. */
|
written, and discard those past the max from the buffer. */
|
fs->point_col += len;
|
fs->point_col += len;
|
fs->p -= fs->point_col - r;
|
fs->p -= fs->point_col - r;
|
break;
|
break;
|
}
|
}
|
}
|
}
|
else
|
else
|
{
|
{
|
/* Do word wrap. Go to the column just past the maximum line
|
/* Do word wrap. Go to the column just past the maximum line
|
width and scan back for the beginning of the word there.
|
width and scan back for the beginning of the word there.
|
Then insert a line break. */
|
Then insert a line break. */
|
|
|
char *p, *nextline;
|
char *p, *nextline;
|
int i;
|
int i;
|
|
|
p = buf + (r + 1 - fs->point_col);
|
p = buf + (r + 1 - fs->point_col);
|
while (p >= buf && !isblank (*p))
|
while (p >= buf && !isblank (*p))
|
--p;
|
--p;
|
nextline = p + 1; /* This will begin the next line. */
|
nextline = p + 1; /* This will begin the next line. */
|
|
|
if (nextline > buf)
|
if (nextline > buf)
|
{
|
{
|
/* Swallow separating blanks. */
|
/* Swallow separating blanks. */
|
if (p >= buf)
|
if (p >= buf)
|
do
|
do
|
--p;
|
--p;
|
while (p >= buf && isblank (*p));
|
while (p >= buf && isblank (*p));
|
nl = p + 1; /* The newline will replace the first blank. */
|
nl = p + 1; /* The newline will replace the first blank. */
|
}
|
}
|
else
|
else
|
{
|
{
|
/* A single word that is greater than the maximum line width.
|
/* A single word that is greater than the maximum line width.
|
Oh well. Put it on an overlong line by itself. */
|
Oh well. Put it on an overlong line by itself. */
|
p = buf + (r + 1 - fs->point_col);
|
p = buf + (r + 1 - fs->point_col);
|
/* Find the end of the long word. */
|
/* Find the end of the long word. */
|
do
|
do
|
++p;
|
++p;
|
while (p < nl && !isblank (*p));
|
while (p < nl && !isblank (*p));
|
if (p == nl)
|
if (p == nl)
|
{
|
{
|
/* It already ends a line. No fussing required. */
|
/* It already ends a line. No fussing required. */
|
fs->point_col = 0;
|
fs->point_col = 0;
|
buf = nl + 1;
|
buf = nl + 1;
|
continue;
|
continue;
|
}
|
}
|
/* We will move the newline to replace the first blank. */
|
/* We will move the newline to replace the first blank. */
|
nl = p;
|
nl = p;
|
/* Swallow separating blanks. */
|
/* Swallow separating blanks. */
|
do
|
do
|
++p;
|
++p;
|
while (isblank (*p));
|
while (isblank (*p));
|
/* The next line will start here. */
|
/* The next line will start here. */
|
nextline = p;
|
nextline = p;
|
}
|
}
|
|
|
/* Note: There are a bunch of tests below for
|
/* Note: There are a bunch of tests below for
|
NEXTLINE == BUF + LEN + 1; this case is where NL happens to fall
|
NEXTLINE == BUF + LEN + 1; this case is where NL happens to fall
|
at the end of the buffer, and NEXTLINE is in fact empty (and so
|
at the end of the buffer, and NEXTLINE is in fact empty (and so
|
we need not be careful to maintain its contents). */
|
we need not be careful to maintain its contents). */
|
|
|
if (nextline == buf + len + 1
|
if (nextline == buf + len + 1
|
? fs->end - nl < fs->wmargin + 1
|
? fs->end - nl < fs->wmargin + 1
|
: nextline - (nl + 1) < fs->wmargin)
|
: nextline - (nl + 1) < fs->wmargin)
|
{
|
{
|
/* The margin needs more blanks than we removed. */
|
/* The margin needs more blanks than we removed. */
|
if (fs->end - fs->p > fs->wmargin + 1)
|
if (fs->end - fs->p > fs->wmargin + 1)
|
/* Make some space for them. */
|
/* Make some space for them. */
|
{
|
{
|
size_t mv = fs->p - nextline;
|
size_t mv = fs->p - nextline;
|
memmove (nl + 1 + fs->wmargin, nextline, mv);
|
memmove (nl + 1 + fs->wmargin, nextline, mv);
|
nextline = nl + 1 + fs->wmargin;
|
nextline = nl + 1 + fs->wmargin;
|
len = nextline + mv - buf;
|
len = nextline + mv - buf;
|
*nl++ = '\n';
|
*nl++ = '\n';
|
}
|
}
|
else
|
else
|
/* Output the first line so we can use the space. */
|
/* Output the first line so we can use the space. */
|
{
|
{
|
#ifdef USE_IN_LIBIO
|
#ifdef USE_IN_LIBIO
|
if (_IO_fwide (fs->stream, 0) > 0)
|
if (_IO_fwide (fs->stream, 0) > 0)
|
__fwprintf (fs->stream, L"%.*s\n",
|
__fwprintf (fs->stream, L"%.*s\n",
|
(int) (nl - fs->buf), fs->buf);
|
(int) (nl - fs->buf), fs->buf);
|
else
|
else
|
#endif
|
#endif
|
{
|
{
|
if (nl > fs->buf)
|
if (nl > fs->buf)
|
fwrite (fs->buf, 1, nl - fs->buf, fs->stream);
|
fwrite (fs->buf, 1, nl - fs->buf, fs->stream);
|
putc_unlocked ('\n', fs->stream);
|
putc_unlocked ('\n', fs->stream);
|
}
|
}
|
len += buf - fs->buf;
|
len += buf - fs->buf;
|
nl = buf = fs->buf;
|
nl = buf = fs->buf;
|
}
|
}
|
}
|
}
|
else
|
else
|
/* We can fit the newline and blanks in before
|
/* We can fit the newline and blanks in before
|
the next word. */
|
the next word. */
|
*nl++ = '\n';
|
*nl++ = '\n';
|
|
|
if (nextline - nl >= fs->wmargin
|
if (nextline - nl >= fs->wmargin
|
|| (nextline == buf + len + 1 && fs->end - nextline >= fs->wmargin))
|
|| (nextline == buf + len + 1 && fs->end - nextline >= fs->wmargin))
|
/* Add blanks up to the wrap margin column. */
|
/* Add blanks up to the wrap margin column. */
|
for (i = 0; i < fs->wmargin; ++i)
|
for (i = 0; i < fs->wmargin; ++i)
|
*nl++ = ' ';
|
*nl++ = ' ';
|
else
|
else
|
for (i = 0; i < fs->wmargin; ++i)
|
for (i = 0; i < fs->wmargin; ++i)
|
#ifdef USE_IN_LIBIO
|
#ifdef USE_IN_LIBIO
|
if (_IO_fwide (fs->stream, 0) > 0)
|
if (_IO_fwide (fs->stream, 0) > 0)
|
putwc_unlocked (L' ', fs->stream);
|
putwc_unlocked (L' ', fs->stream);
|
else
|
else
|
#endif
|
#endif
|
putc_unlocked (' ', fs->stream);
|
putc_unlocked (' ', fs->stream);
|
|
|
/* Copy the tail of the original buffer into the current buffer
|
/* Copy the tail of the original buffer into the current buffer
|
position. */
|
position. */
|
if (nl < nextline)
|
if (nl < nextline)
|
memmove (nl, nextline, buf + len - nextline);
|
memmove (nl, nextline, buf + len - nextline);
|
len -= nextline - buf;
|
len -= nextline - buf;
|
|
|
/* Continue the scan on the remaining lines in the buffer. */
|
/* Continue the scan on the remaining lines in the buffer. */
|
buf = nl;
|
buf = nl;
|
|
|
/* Restore bufp to include all the remaining text. */
|
/* Restore bufp to include all the remaining text. */
|
fs->p = nl + len;
|
fs->p = nl + len;
|
|
|
/* Reset the counter of what has been output this line. If wmargin
|
/* Reset the counter of what has been output this line. If wmargin
|
is 0, we want to avoid the lmargin getting added, so we set
|
is 0, we want to avoid the lmargin getting added, so we set
|
point_col to a magic value of -1 in that case. */
|
point_col to a magic value of -1 in that case. */
|
fs->point_col = fs->wmargin ? fs->wmargin : -1;
|
fs->point_col = fs->wmargin ? fs->wmargin : -1;
|
}
|
}
|
}
|
}
|
|
|
/* Remember that we've scanned as far as the end of the buffer. */
|
/* Remember that we've scanned as far as the end of the buffer. */
|
fs->point_offs = fs->p - fs->buf;
|
fs->point_offs = fs->p - fs->buf;
|
}
|
}
|
|
|
/* Ensure that FS has space for AMOUNT more bytes in its buffer, either by
|
/* Ensure that FS has space for AMOUNT more bytes in its buffer, either by
|
growing the buffer, or by flushing it. True is returned iff we succeed. */
|
growing the buffer, or by flushing it. True is returned iff we succeed. */
|
int
|
int
|
__argp_fmtstream_ensure (struct argp_fmtstream *fs, size_t amount)
|
__argp_fmtstream_ensure (struct argp_fmtstream *fs, size_t amount)
|
{
|
{
|
if ((size_t) (fs->end - fs->p) < amount)
|
if ((size_t) (fs->end - fs->p) < amount)
|
{
|
{
|
ssize_t wrote;
|
ssize_t wrote;
|
|
|
/* Flush FS's buffer. */
|
/* Flush FS's buffer. */
|
__argp_fmtstream_update (fs);
|
__argp_fmtstream_update (fs);
|
|
|
#ifdef USE_IN_LIBIO
|
#ifdef USE_IN_LIBIO
|
if (_IO_fwide (fs->stream, 0) > 0)
|
if (_IO_fwide (fs->stream, 0) > 0)
|
{
|
{
|
__fwprintf (fs->stream, L"%.*s", (int) (fs->p - fs->buf), fs->buf);
|
__fwprintf (fs->stream, L"%.*s", (int) (fs->p - fs->buf), fs->buf);
|
wrote = fs->p - fs->buf;
|
wrote = fs->p - fs->buf;
|
}
|
}
|
else
|
else
|
#endif
|
#endif
|
wrote = fwrite (fs->buf, 1, fs->p - fs->buf, fs->stream);
|
wrote = fwrite (fs->buf, 1, fs->p - fs->buf, fs->stream);
|
if (wrote == fs->p - fs->buf)
|
if (wrote == fs->p - fs->buf)
|
{
|
{
|
fs->p = fs->buf;
|
fs->p = fs->buf;
|
fs->point_offs = 0;
|
fs->point_offs = 0;
|
}
|
}
|
else
|
else
|
{
|
{
|
fs->p -= wrote;
|
fs->p -= wrote;
|
fs->point_offs -= wrote;
|
fs->point_offs -= wrote;
|
memmove (fs->buf, fs->buf + wrote, fs->p - fs->buf);
|
memmove (fs->buf, fs->buf + wrote, fs->p - fs->buf);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
if ((size_t) (fs->end - fs->buf) < amount)
|
if ((size_t) (fs->end - fs->buf) < amount)
|
/* Gotta grow the buffer. */
|
/* Gotta grow the buffer. */
|
{
|
{
|
size_t new_size = fs->end - fs->buf + amount;
|
size_t new_size = fs->end - fs->buf + amount;
|
char *new_buf = realloc (fs->buf, new_size);
|
char *new_buf = realloc (fs->buf, new_size);
|
|
|
if (! new_buf)
|
if (! new_buf)
|
{
|
{
|
__set_errno (ENOMEM);
|
__set_errno (ENOMEM);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
fs->buf = new_buf;
|
fs->buf = new_buf;
|
fs->end = new_buf + new_size;
|
fs->end = new_buf + new_size;
|
fs->p = fs->buf;
|
fs->p = fs->buf;
|
}
|
}
|
}
|
}
|
|
|
return 1;
|
return 1;
|
}
|
}
|
|
|
ssize_t
|
ssize_t
|
__argp_fmtstream_printf (struct argp_fmtstream *fs, const char *fmt, ...)
|
__argp_fmtstream_printf (struct argp_fmtstream *fs, const char *fmt, ...)
|
{
|
{
|
int out;
|
int out;
|
size_t avail;
|
size_t avail;
|
size_t size_guess = PRINTF_SIZE_GUESS; /* How much space to reserve. */
|
size_t size_guess = PRINTF_SIZE_GUESS; /* How much space to reserve. */
|
|
|
do
|
do
|
{
|
{
|
va_list args;
|
va_list args;
|
|
|
if (! __argp_fmtstream_ensure (fs, size_guess))
|
if (! __argp_fmtstream_ensure (fs, size_guess))
|
return -1;
|
return -1;
|
|
|
va_start (args, fmt);
|
va_start (args, fmt);
|
avail = fs->end - fs->p;
|
avail = fs->end - fs->p;
|
out = __vsnprintf (fs->p, avail, fmt, args);
|
out = __vsnprintf (fs->p, avail, fmt, args);
|
va_end (args);
|
va_end (args);
|
if (out >= avail)
|
if (out >= avail)
|
size_guess = out + 1;
|
size_guess = out + 1;
|
}
|
}
|
while (out >= avail);
|
while (out >= avail);
|
|
|
fs->p += out;
|
fs->p += out;
|
|
|
return out;
|
return out;
|
}
|
}
|
#ifdef weak_alias
|
#ifdef weak_alias
|
weak_alias (__argp_fmtstream_printf, argp_fmtstream_printf)
|
weak_alias (__argp_fmtstream_printf, argp_fmtstream_printf)
|
#endif
|
#endif
|
|
|
#endif /* !ARGP_FMTSTREAM_USE_LINEWRAP */
|
#endif /* !ARGP_FMTSTREAM_USE_LINEWRAP */
|
|
|
