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glibc  2.9
Classes | Defines | Typedefs | Functions
argp-fmtstream.h File Reference
#include <stdio.h>
#include <string.h>
#include <unistd.h>
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Classes

struct  argp_fmtstream

Defines

#define __attribute__(Spec)   /* empty */
#define __format__   format
#define __printf__   printf
#define __const   const
#define argp_fmtstream_lmargin(__fs)   ((__fs)->lmargin)
#define argp_fmtstream_rmargin(__fs)   ((__fs)->rmargin)
#define argp_fmtstream_wmargin(__fs)   ((__fs)->wmargin)
#define __argp_fmtstream_lmargin   argp_fmtstream_lmargin
#define __argp_fmtstream_rmargin   argp_fmtstream_rmargin
#define __argp_fmtstream_wmargin   argp_fmtstream_wmargin

Typedefs

typedef struct argp_fmtstreamargp_fmtstream_t

Functions

argp_fmtstream_t __argp_make_fmtstream (FILE *__stream, size_t __lmargin, size_t __rmargin, ssize_t __wmargin)
argp_fmtstream_t argp_make_fmtstream (FILE *__stream, size_t __lmargin, size_t __rmargin, ssize_t __wmargin)
void __argp_fmtstream_free (argp_fmtstream_t __fs)
void argp_fmtstream_free (argp_fmtstream_t __fs)
ssize_t __argp_fmtstream_printf (argp_fmtstream_t __fs, __const char *__fmt,...) __attribute__((__format__(printf
ssize_t ssize_t argp_fmtstream_printf (argp_fmtstream_t __fs, __const char *__fmt,...) __attribute__((__format__(printf
ssize_t ssize_t int __argp_fmtstream_putc (argp_fmtstream_t __fs, int __ch)
int argp_fmtstream_putc (argp_fmtstream_t __fs, int __ch)
int __argp_fmtstream_puts (argp_fmtstream_t __fs, __const char *__str)
int argp_fmtstream_puts (argp_fmtstream_t __fs, __const char *__str)
size_t __argp_fmtstream_write (argp_fmtstream_t __fs, __const char *__str, size_t __len)
size_t argp_fmtstream_write (argp_fmtstream_t __fs, __const char *__str, size_t __len)
size_t argp_fmtstream_set_lmargin (argp_fmtstream_t __fs, size_t __lmargin)
size_t __argp_fmtstream_set_lmargin (argp_fmtstream_t __fs, size_t __lmargin)
size_t argp_fmtstream_set_rmargin (argp_fmtstream_t __fs, size_t __rmargin)
size_t __argp_fmtstream_set_rmargin (argp_fmtstream_t __fs, size_t __rmargin)
size_t argp_fmtstream_set_wmargin (argp_fmtstream_t __fs, size_t __wmargin)
size_t __argp_fmtstream_set_wmargin (argp_fmtstream_t __fs, size_t __wmargin)
size_t argp_fmtstream_point (argp_fmtstream_t __fs)
size_t __argp_fmtstream_point (argp_fmtstream_t __fs)
void _argp_fmtstream_update (argp_fmtstream_t __fs)
void __argp_fmtstream_update (argp_fmtstream_t __fs)
int _argp_fmtstream_ensure (argp_fmtstream_t __fs, size_t __amount)
int __argp_fmtstream_ensure (argp_fmtstream_t __fs, size_t __amount)

Class Documentation

struct argp_fmtstream

Definition at line 98 of file argp-fmtstream.h.

Class Members
char * buf
char * end
size_t lmargin
char * p
ssize_t point_col
size_t point_offs
size_t rmargin
FILE * stream
ssize_t wmargin

Define Documentation

Definition at line 158 of file argp-fmtstream.h.

Definition at line 159 of file argp-fmtstream.h.

Definition at line 160 of file argp-fmtstream.h.

#define __attribute__ (   Spec)    /* empty */

Definition at line 36 of file argp-fmtstream.h.

#define __const   const

Definition at line 95 of file argp-fmtstream.h.

#define __format__   format

Definition at line 41 of file argp-fmtstream.h.

#define __printf__   printf

Definition at line 42 of file argp-fmtstream.h.

#define argp_fmtstream_lmargin (   __fs)    ((__fs)->lmargin)

Definition at line 155 of file argp-fmtstream.h.

#define argp_fmtstream_rmargin (   __fs)    ((__fs)->rmargin)

Definition at line 156 of file argp-fmtstream.h.

#define argp_fmtstream_wmargin (   __fs)    ((__fs)->wmargin)

Definition at line 157 of file argp-fmtstream.h.


Typedef Documentation

Definition at line 115 of file argp-fmtstream.h.


Function Documentation

Definition at line 99 of file argp-fmtstream.c.

{
  __argp_fmtstream_update (fs);
  if (fs->p > fs->buf)
    {
#ifdef USE_IN_LIBIO
      __fxprintf (fs->stream, "%.*s", (int) (fs->p - fs->buf), fs->buf);
#else
      fwrite_unlocked (fs->buf, 1, fs->p - fs->buf, fs->stream);
#endif
    }
  free (fs->buf);
  free (fs);
}

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ssize_t __argp_fmtstream_printf ( argp_fmtstream_t  __fs,
__const char *  __fmt,
  ... 
)

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int __argp_fmtstream_puts ( argp_fmtstream_t  __fs,
__const char *  __str 
)

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Definition at line 123 of file argp-fmtstream.c.

{
  char *buf, *nl;
  size_t len;

  /* Scan the buffer for newlines.  */
  buf = fs->buf + fs->point_offs;
  while (buf < fs->p)
    {
      size_t r;

      if (fs->point_col == 0 && fs->lmargin != 0)
       {
         /* We are starting a new line.  Print spaces to the left margin.  */
         const size_t pad = fs->lmargin;
         if (fs->p + pad < fs->end)
           {
             /* We can fit in them in the buffer by moving the
               buffer text up and filling in the beginning.  */
             memmove (buf + pad, buf, fs->p - buf);
             fs->p += pad; /* Compensate for bigger buffer. */
             memset (buf, ' ', pad); /* Fill in the spaces.  */
             buf += pad; /* Don't bother searching them.  */
           }
         else
           {
             /* No buffer space for spaces.  Must flush.  */
             size_t i;
             for (i = 0; i < pad; i++)
              {
#ifdef USE_IN_LIBIO
                if (_IO_fwide (fs->stream, 0) > 0)
                  putwc_unlocked (L' ', fs->stream);
                else
#endif
                  putc_unlocked (' ', fs->stream);
              }
           }
         fs->point_col = pad;
       }

      len = fs->p - buf;
      nl = memchr (buf, '\n', len);

      if (fs->point_col < 0)
       fs->point_col = 0;

      if (!nl)
       {
         /* The buffer ends in a partial line.  */

         if (fs->point_col + len < fs->rmargin)
           {
             /* The remaining buffer text is a partial line and fits
               within the maximum line width.  Advance point for the
               characters to be written and stop scanning.  */
             fs->point_col += len;
             break;
           }
         else
           /* Set the end-of-line pointer for the code below to
              the end of the buffer.  */
           nl = fs->p;
       }
      else if (fs->point_col + (nl - buf) < (ssize_t) fs->rmargin)
       {
         /* The buffer contains a full line that fits within the maximum
            line width.  Reset point and scan the next line.  */
         fs->point_col = 0;
         buf = nl + 1;
         continue;
       }

      /* This line is too long.  */
      r = fs->rmargin - 1;

      if (fs->wmargin < 0)
       {
         /* Truncate the line by overwriting the excess with the
            newline and anything after it in the buffer.  */
         if (nl < fs->p)
           {
             memmove (buf + (r - fs->point_col), nl, fs->p - nl);
             fs->p -= buf + (r - fs->point_col) - nl;
             /* Reset point for the next line and start scanning it.  */
             fs->point_col = 0;
             buf += r + 1; /* Skip full line plus \n. */
           }
         else
           {
             /* The buffer ends with a partial line that is beyond the
               maximum line width.  Advance point for the characters
               written, and discard those past the max from the buffer.  */
             fs->point_col += len;
             fs->p -= fs->point_col - r;
             break;
           }
       }
      else
       {
         /* Do word wrap.  Go to the column just past the maximum line
            width and scan back for the beginning of the word there.
            Then insert a line break.  */

         char *p, *nextline;
         int i;

         p = buf + (r + 1 - fs->point_col);
         while (p >= buf && !isblank (*p))
           --p;
         nextline = p + 1;  /* This will begin the next line.  */

         if (nextline > buf)
           {
             /* Swallow separating blanks.  */
             if (p >= buf)
              do
                --p;
              while (p >= buf && isblank (*p));
             nl = p + 1;    /* The newline will replace the first blank. */
           }
         else
           {
             /* A single word that is greater than the maximum line width.
               Oh well.  Put it on an overlong line by itself.  */
             p = buf + (r + 1 - fs->point_col);
             /* Find the end of the long word.  */
             do
              ++p;
             while (p < nl && !isblank (*p));
             if (p == nl)
              {
                /* It already ends a line.  No fussing required.  */
                fs->point_col = 0;
                buf = nl + 1;
                continue;
              }
             /* We will move the newline to replace the first blank.  */
             nl = p;
             /* Swallow separating blanks.  */
             do
              ++p;
             while (isblank (*p));
             /* The next line will start here.  */
             nextline = p;
           }

         /* Note: There are a bunch of tests below for
            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
            we need not be careful to maintain its contents).  */

         if ((nextline == buf + len + 1
              ? fs->end - nl < fs->wmargin + 1
              : nextline - (nl + 1) < fs->wmargin)
             && fs->p > nextline)
           {
             /* The margin needs more blanks than we removed.  */
             if (fs->end - fs->p > fs->wmargin + 1)
              /* Make some space for them.  */
              {
                size_t mv = fs->p - nextline;
                memmove (nl + 1 + fs->wmargin, nextline, mv);
                nextline = nl + 1 + fs->wmargin;
                len = nextline + mv - buf;
                *nl++ = '\n';
              }
             else
              /* Output the first line so we can use the space.  */
              {
#ifdef _LIBC
                __fxprintf (fs->stream, "%.*s\n",
                           (int) (nl - fs->buf), fs->buf);
#else
                if (nl > fs->buf)
                  fwrite_unlocked (fs->buf, 1, nl - fs->buf, fs->stream);
                putc_unlocked ('\n', fs->stream);
#endif

                len += buf - fs->buf;
                nl = buf = fs->buf;
              }
           }
         else
           /* We can fit the newline and blanks in before
              the next word.  */
           *nl++ = '\n';

         if (nextline - nl >= fs->wmargin
             || (nextline == buf + len + 1 && fs->end - nextline >= fs->wmargin))
           /* Add blanks up to the wrap margin column.  */
           for (i = 0; i < fs->wmargin; ++i)
             *nl++ = ' ';
         else
           for (i = 0; i < fs->wmargin; ++i)
#ifdef USE_IN_LIBIO
             if (_IO_fwide (fs->stream, 0) > 0)
              putwc_unlocked (L' ', fs->stream);
             else
#endif
              putc_unlocked (' ', fs->stream);

         /* Copy the tail of the original buffer into the current buffer
            position.  */
         if (nl < nextline)
           memmove (nl, nextline, buf + len - nextline);
         len -= nextline - buf;

         /* Continue the scan on the remaining lines in the buffer.  */
         buf = nl;

         /* Restore bufp to include all the remaining text.  */
         fs->p = nl + len;

         /* 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
            point_col to a magic value of -1 in that case.  */
         fs->point_col = fs->wmargin ? fs->wmargin : -1;
       }
    }

  /* Remember that we've scanned as far as the end of the buffer.  */
  fs->point_offs = fs->p - fs->buf;
}

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size_t __argp_fmtstream_write ( argp_fmtstream_t  __fs,
__const char *  __str,
size_t  __len 
)

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argp_fmtstream_t __argp_make_fmtstream ( FILE __stream,
size_t  __lmargin,
size_t  __rmargin,
ssize_t  __wmargin 
)

Definition at line 59 of file argp-fmtstream.c.

{
  argp_fmtstream_t fs;

  fs = (struct argp_fmtstream *) malloc (sizeof (struct argp_fmtstream));
  if (fs != NULL)
    {
      fs->stream = stream;

      fs->lmargin = lmargin;
      fs->rmargin = rmargin;
      fs->wmargin = wmargin;
      fs->point_col = 0;
      fs->point_offs = 0;

      fs->buf = (char *) malloc (INIT_BUF_SIZE);
      if (! fs->buf)
       {
         free (fs);
         fs = 0;
       }
      else
       {
         fs->p = fs->buf;
         fs->end = fs->buf + INIT_BUF_SIZE;
       }
    }

  return fs;
}
ssize_t ssize_t argp_fmtstream_printf ( argp_fmtstream_t  __fs,
__const char *  __fmt,
  ... 
)
int argp_fmtstream_puts ( argp_fmtstream_t  __fs,
__const char *  __str 
)
size_t argp_fmtstream_write ( argp_fmtstream_t  __fs,
__const char *  __str,
size_t  __len 
)
argp_fmtstream_t argp_make_fmtstream ( FILE __stream,
size_t  __lmargin,
size_t  __rmargin,
ssize_t  __wmargin 
)