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vfprintf.c

/*
 * Copyright (c) 2000-2001, 2004 Sendmail, Inc. and its suppliers.
 *      All rights reserved.
 * Copyright (c) 1990
 *    The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Chris Torek.
 *
 * By using this file, you agree to the terms and conditions set
 * forth in the LICENSE file which can be found at the top level of
 * the sendmail distribution.
 */

#include <sm/gen.h>
SM_IDSTR(id, "@(#)$Id: vfprintf.c,v 1.54 2005/05/16 03:52:00 ca Exp $")

/*
**  Overall:
**  Actual printing innards.
**  This code is large and complicated...
*/

#include <sys/types.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sm/config.h>
#include <sm/varargs.h>
#include <sm/io.h>
#include <sm/heap.h>
#include <sm/conf.h>
#include "local.h"
#include "fvwrite.h"

static int  sm_bprintf __P((SM_FILE_T *, const char *, va_list));
static void sm_find_arguments __P((const char *, va_list , va_list **));
static void sm_grow_type_table_x __P((unsigned char **, int *));
static int  sm_print __P((SM_FILE_T *, int, struct sm_uio *));

/*
**  SM_PRINT -- print/flush to the file
**
**  Flush out all the vectors defined by the given uio,
**  then reset it so that it can be reused.
**
**    Parameters:
**          fp -- file pointer
**          timeout -- time to complete operation (milliseconds)
**          uio -- vector list of memory locations of data for printing
**
**    Results:
**          Success: 0 (zero)
**          Failure:
*/

static int
sm_print(fp, timeout, uio)
      SM_FILE_T *fp;
      int timeout;
      register struct sm_uio *uio;
{
      register int err;

      if (uio->uio_resid == 0)
      {
            uio->uio_iovcnt = 0;
            return 0;
      }
      err = sm_fvwrite(fp, timeout, uio);
      uio->uio_resid = 0;
      uio->uio_iovcnt = 0;
      return err;
}

/*
**  SM_BPRINTF -- allow formating to an unbuffered file.
**
**  Helper function for `fprintf to unbuffered unix file': creates a
**  temporary buffer (via a "fake" file pointer).
**  We only work on write-only files; this avoids
**  worries about ungetc buffers and so forth.
**
**    Parameters:
**          fp -- the file to send the o/p to
**          fmt -- format instructions for the o/p
**          ap -- vectors of data units used for formating
**
**    Results:
**          Failure: SM_IO_EOF and errno set
**          Success: number of data units used in the formating
**
**    Side effects:
**          formatted o/p can be SM_IO_BUFSIZ length maximum
*/

static int
sm_bprintf(fp, fmt, ap)
      SM_FILE_T *fp;
      const char *fmt;
      SM_VA_LOCAL_DECL
{
      int ret;
      SM_FILE_T fake;
      unsigned char buf[SM_IO_BUFSIZ];
      extern const char SmFileMagic[];

      /* copy the important variables */
      fake.sm_magic = SmFileMagic;
      fake.f_timeout = SM_TIME_FOREVER;
      fake.f_timeoutstate = SM_TIME_BLOCK;
      fake.f_flags = fp->f_flags & ~SMNBF;
      fake.f_file = fp->f_file;
      fake.f_cookie = fp->f_cookie;
      fake.f_write = fp->f_write;
      fake.f_close = NULL;
      fake.f_open = NULL;
      fake.f_read = NULL;
      fake.f_seek = NULL;
      fake.f_setinfo = fake.f_getinfo = NULL;
      fake.f_type = "sm_bprintf:fake";

      /* set up the buffer */
      fake.f_bf.smb_base = fake.f_p = buf;
      fake.f_bf.smb_size = fake.f_w = sizeof(buf);
      fake.f_lbfsize = 0;     /* not actually used, but Just In Case */

      /* do the work, then copy any error status */
      ret = sm_io_vfprintf(&fake, SM_TIME_FOREVER, fmt, ap);
      if (ret >= 0 && sm_io_flush(&fake, SM_TIME_FOREVER))
            ret = SM_IO_EOF;  /* errno set by sm_io_flush */
      if (fake.f_flags & SMERR)
            fp->f_flags |= SMERR;
      return ret;
}


#define BUF       40

#define STATIC_ARG_TBL_SIZE 8 /* Size of static argument table. */


/* Macros for converting digits to letters and vice versa */
#define to_digit(c)     ((c) - '0')
#define is_digit(c)     ((unsigned) to_digit(c) <= 9)
#define to_char(n)      ((char) (n) + '0')

/* Flags used during conversion. */
#define ALT       0x001       /* alternate form */
#define HEXPREFIX 0x002       /* add 0x or 0X prefix */
#define LADJUST         0x004       /* left adjustment */
#define LONGINT         0x010       /* long integer */
#define QUADINT         0x020       /* quad integer */
#define SHORTINT  0x040       /* short integer */
#define ZEROPAD         0x080       /* zero (as opposed to blank) pad */
#define FPT       0x100       /* Floating point number */

/*
**  SM_IO_VPRINTF -- performs actual formating for o/p
**
**    Parameters:
**          fp -- file pointer for o/p
**          timeout -- time to complete the print
**          fmt0 -- formating directives
**          ap -- vectors with data units for formating
**
**    Results:
**          Success: number of data units used for formatting
**          Failure: SM_IO_EOF and sets errno
*/

int
sm_io_vfprintf(fp, timeout, fmt0, ap)
      SM_FILE_T *fp;
      int timeout;
      const char *fmt0;
      SM_VA_LOCAL_DECL
{
      register char *fmt;     /* format string */
      register int ch;  /* character from fmt */
      register int n, m, n2;  /* handy integers (short term usage) */
      register char *cp;      /* handy char pointer (short term usage) */
      register struct sm_iov *iovp;/* for PRINT macro */
      register 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 */
      char sign;        /* sign prefix (' ', '+', '-', or \0) */
      wchar_t wc;
      ULONGLONG_T _uquad;     /* integer arguments %[diouxX] */
      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="0123456789abcdef"; /* digits for [xX] conversion */
#define NIOV 8
      struct sm_uio uio;      /* output information: summary */
      struct sm_iov iov[NIOV];/* ... and individual io vectors */
      char buf[BUF];          /* space for %c, %[diouxX], %[eEfgG] */
      char ox[2];       /* space for 0x hex-prefix */
      va_list *argtable;      /* args, built due to positional arg */
      va_list statargtable[STATIC_ARG_TBL_SIZE];
      int nextarg;            /* 1-based argument index */
      va_list orgap;          /* original argument pointer */

      /*
      **  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 char blanks[PADSIZE] =
       {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '};
      static char zeroes[PADSIZE] =
       {'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'};

      /*
      **  BEWARE, these `goto error' on error, and PAD uses `n'.
      */
#define PRINT(ptr, len) do { \
      iovp->iov_base = (ptr); \
      iovp->iov_len = (len); \
      uio.uio_resid += (len); \
      iovp++; \
      if (++uio.uio_iovcnt >= NIOV) \
      { \
            if (sm_print(fp, timeout, &uio)) \
                  goto error; \
            iovp = iov; \
      } \
} while (0)
#define PAD(howmany, with) do \
{ \
      if ((n = (howmany)) > 0) \
      { \
            while (n > PADSIZE) { \
                  PRINT(with, PADSIZE); \
                  n -= PADSIZE; \
            } \
            PRINT(with, n); \
      } \
} while (0)
#define FLUSH() do \
{ \
      if (uio.uio_resid && sm_print(fp, timeout, &uio)) \
            goto error; \
      uio.uio_iovcnt = 0; \
      iovp = iov; \
} while (0)

      /*
      **  To extend shorts properly, we need both signed and unsigned
      **  argument extraction methods.
      */
#define SARG() \
      (flags&QUADINT ? SM_VA_ARG(ap, LONGLONG_T) : \
          flags&LONGINT ? GETARG(long) : \
          flags&SHORTINT ? (long) (short) GETARG(int) : \
          (long) GETARG(int))
#define UARG() \
      (flags&QUADINT ? SM_VA_ARG(ap, ULONGLONG_T) : \
          flags&LONGINT ? GETARG(unsigned long) : \
          flags&SHORTINT ? (unsigned long) (unsigned short) GETARG(int) : \
          (unsigned long) GETARG(unsigned int))

      /*
      **  Get * arguments, including the form *nn$.  Preserve the nextarg
      **  that the argument can be gotten once the type is determined.
      */
#define GETASTER(val) \
      n2 = 0; \
      cp = fmt; \
      while (is_digit(*cp)) \
      { \
            n2 = 10 * n2 + to_digit(*cp); \
            cp++; \
      } \
      if (*cp == '$') \
      { \
            int hold = nextarg; \
            if (argtable == NULL) \
            { \
                  argtable = statargtable; \
                  sm_find_arguments(fmt0, orgap, &argtable); \
            } \
            nextarg = n2; \
            val = GETARG(int); \
            nextarg = hold; \
            fmt = ++cp; \
      } \
      else \
      { \
            val = GETARG(int); \
      }

/*
**  Get the argument indexed by nextarg.   If the argument table is
**  built, use it to get the argument.  If its not, get the next
**  argument (and arguments must be gotten sequentially).
*/

#if SM_VA_STD
# define GETARG(type) \
      (((argtable != NULL) ? (void) (ap = argtable[nextarg]) : (void) 0), \
       nextarg++, SM_VA_ARG(ap, type))
#else /* SM_VA_STD */
# define GETARG(type) \
      ((argtable != NULL) ? (*((type*)(argtable[nextarg++]))) : \
                        (nextarg++, SM_VA_ARG(ap, type)))
#endif /* SM_VA_STD */

      /* sorry, fprintf(read_only_file, "") returns SM_IO_EOF, not 0 */
      if (cantwrite(fp))
      {
            errno = EBADF;
            return SM_IO_EOF;
      }

      /* optimise fprintf(stderr) (and other unbuffered Unix files) */
      if ((fp->f_flags & (SMNBF|SMWR|SMRW)) == (SMNBF|SMWR) &&
          fp->f_file >= 0)
            return sm_bprintf(fp, fmt0, ap);

      fmt = (char *) fmt0;
      argtable = NULL;
      nextarg = 1;
      SM_VA_COPY(orgap, ap);
      uio.uio_iov = iovp = iov;
      uio.uio_resid = 0;
      uio.uio_iovcnt = 0;
      ret = 0;

      /* Scan the format for conversions (`%' character). */
      for (;;)
      {
            cp = fmt;
            n = 0;
            while ((wc = *fmt) != '\0')
            {
                  if (wc == '%')
                  {
                        n = 1;
                        break;
                  }
                  fmt++;
            }
            if ((m = fmt - cp) != 0)
            {
                  PRINT(cp, m);
                  ret += m;
            }
            if (n <= 0)
                  goto done;
            fmt++;            /* skip over '%' */

            flags = 0;
            dprec = 0;
            width = 0;
            prec = -1;
            sign = '\0';

rflag:            ch = *fmt++;
reswitch:   switch (ch)
            {
              case ' ':

                  /*
                  **  ``If the space and + flags both appear, the space
                  **  flag will be ignored.''
                  **    -- ANSI X3J11
                  */

                  if (!sign)
                        sign = ' ';
                  goto rflag;
              case '#':
                  flags |= ALT;
                  goto rflag;
              case '*':

                  /*
                  **  ``A negative field width argument is taken as a
                  **  - flag followed by a positive field width.''
                  **    -- ANSI X3J11
                  **  They don't exclude field widths read from args.
                  */

                  GETASTER(width);
                  if (width >= 0)
                        goto rflag;
                  width = -width;
                  /* FALLTHROUGH */
              case '-':
                  flags |= LADJUST;
                  goto rflag;
              case '+':
                  sign = '+';
                  goto rflag;
              case '.':
                  if ((ch = *fmt++) == '*')
                  {
                        GETASTER(n);
                        prec = n < 0 ? -1 : n;
                        goto rflag;
                  }
                  n = 0;
                  while (is_digit(ch))
                  {
                        n = 10 * n + to_digit(ch);
                        ch = *fmt++;
                  }
                  if (ch == '$')
                  {
                        nextarg = n;
                        if (argtable == NULL)
                        {
                              argtable = statargtable;
                              sm_find_arguments(fmt0, orgap,
                                  &argtable);
                        }
                        goto rflag;
                  }
                  prec = n < 0 ? -1 : n;
                  goto reswitch;
              case '0':

                  /*
                  **  ``Note that 0 is taken as a flag, not as the
                  **  beginning of a field width.''
                  **    -- ANSI X3J11
                  */

                  flags |= ZEROPAD;
                  goto rflag;
              case '1': case '2': case '3': case '4':
              case '5': case '6': case '7': case '8': case '9':
                  n = 0;
                  do
                  {
                        n = 10 * n + to_digit(ch);
                        ch = *fmt++;
                  } while (is_digit(ch));
                  if (ch == '$')
                  {
                        nextarg = n;
                        if (argtable == NULL)
                        {
                              argtable = statargtable;
                              sm_find_arguments(fmt0, orgap,
                                  &argtable);
                        }
                        goto rflag;
                  }
                  width = n;
                  goto reswitch;
              case 'h':
                  flags |= SHORTINT;
                  goto rflag;
              case 'l':
                  if (*fmt == 'l')
                  {
                        fmt++;
                        flags |= QUADINT;
                  }
                  else
                  {
                        flags |= LONGINT;
                  }
                  goto rflag;
              case 'q':
                  flags |= QUADINT;
                  goto rflag;
              case 'c':
                  *(cp = buf) = GETARG(int);
                  size = 1;
                  sign = '\0';
                  break;
              case 'D':
                  flags |= LONGINT;
                  /*FALLTHROUGH*/
              case 'd':
              case 'i':
                  _uquad = SARG();
                  if ((LONGLONG_T) _uquad < 0)
                  {
                        _uquad = -(LONGLONG_T) _uquad;
                        sign = '-';
                  }
                  base = DEC;
                  goto number;
              case 'e':
              case 'E':
              case 'f':
              case 'g':
              case 'G':
                  {
                        double val;
                        char *p;
                        char fmt[16];
                        char out[150];
                        size_t len;

                        /*
                        **  This code implements floating point output
                        **  in the most portable manner possible,
                        **  relying only on 'sprintf' as defined by
                        **  the 1989 ANSI C standard.
                        **  We silently cap width and precision
                        **  at 120, to avoid buffer overflow.
                        */

                        val = GETARG(double);

                        p = fmt;
                        *p++ = '%';
                        if (sign)
                              *p++ = sign;
                        if (flags & ALT)
                              *p++ = '#';
                        if (flags & LADJUST)
                              *p++ = '-';
                        if (flags & ZEROPAD)
                              *p++ = '0';
                        *p++ = '*';
                        if (prec >= 0)
                        {
                              *p++ = '.';
                              *p++ = '*';
                        }
                        *p++ = ch;
                        *p = '\0';

                        if (width > 120)
                              width = 120;
                        if (prec > 120)
                              prec = 120;
                        if (prec >= 0)
#if HASSNPRINTF
                              snprintf(out, sizeof(out), fmt, width,
                                    prec, val);
#else /* HASSNPRINTF */
                              sprintf(out, fmt, width, prec, val);
#endif /* HASSNPRINTF */
                        else
#if HASSNPRINTF
                              snprintf(out, sizeof(out), fmt, width,
                                    val);
#else /* HASSNPRINTF */
                              sprintf(out, fmt, width, val);
#endif /* HASSNPRINTF */
                        len = strlen(out);
                        PRINT(out, len);
                        FLUSH();
                        continue;
                  }
            case 'n':
                  if (flags & QUADINT)
                        *GETARG(LONGLONG_T *) = ret;
                  else if (flags & LONGINT)
                        *GETARG(long *) = ret;
                  else if (flags & SHORTINT)
                        *GETARG(short *) = ret;
                  else
                        *GETARG(int *) = ret;
                  continue;   /* no output */
              case 'O':
                  flags |= LONGINT;
                  /*FALLTHROUGH*/
              case 'o':
                  _uquad = UARG();
                  base = OCT;
                  goto nosign;
              case 'p':

                  /*
                  **  ``The argument shall be a pointer to void.  The
                  **  value of the pointer is converted to a sequence
                  **  of printable characters, in an implementation-
                  **  defined manner.''
                  **    -- ANSI X3J11
                  */

                  /* NOSTRICT */
                  {
                        union
                        {
                              void *p;
                              ULONGLONG_T ll;
                              unsigned long l;
                              unsigned i;
                        } u;
                        u.p = GETARG(void *);
                        if (sizeof(void *) == sizeof(ULONGLONG_T))
                              _uquad = u.ll;
                        else if (sizeof(void *) == sizeof(long))
                              _uquad = u.l;
                        else
                              _uquad = u.i;
                  }
                  base = HEX;
                  xdigs = "0123456789abcdef";
                  flags |= HEXPREFIX;
                  ch = 'x';
                  goto nosign;
              case 's':
                  if ((cp = GETARG(char *)) == NULL)
                        cp = "(null)";
                  if (prec >= 0)
                  {
                        /*
                        **  can't use strlen; can only look for the
                        **  NUL in the first `prec' characters, and
                        **  strlen() will go further.
                        */

                        char *p = memchr(cp, 0, prec);

                        if (p != NULL)
                        {
                              size = p - cp;
                              if (size > prec)
                                    size = prec;
                        }
                        else
                              size = prec;
                  }
                  else
                        size = strlen(cp);
                  sign = '\0';
                  break;
              case 'U':
                  flags |= LONGINT;
                  /*FALLTHROUGH*/
              case 'u':
                  _uquad = UARG();
                  base = DEC;
                  goto nosign;
              case 'X':
                  xdigs = "0123456789ABCDEF";
                  goto hex;
              case 'x':
                  xdigs = "0123456789abcdef";
hex:              _uquad = UARG();
                  base = HEX;
                  /* leading 0x/X only if non-zero */
                  if (flags & ALT && _uquad != 0)
                        flags |= HEXPREFIX;

                  /* unsigned conversions */
nosign:                 sign = '\0';

                  /*
                  **  ``... diouXx conversions ... if a precision is
                  **  specified, the 0 flag will be ignored.''
                  **    -- ANSI X3J11
                  */

number:                 if ((dprec = prec) >= 0)
                        flags &= ~ZEROPAD;

                  /*
                  **  ``The result of converting a zero value with an
                  **  explicit precision of zero is no characters.''
                  **    -- ANSI X3J11
                  */

                  cp = buf + BUF;
                  if (_uquad != 0 || prec != 0)
                  {
                        /*
                        **  Unsigned mod is hard, and unsigned mod
                        **  by a constant is easier than that by
                        **  a variable; hence this switch.
                        */

                        switch (base)
                        {
                          case OCT:
                              do
                              {
                                    *--cp = to_char(_uquad & 7);
                                    _uquad >>= 3;
                              } while (_uquad);
                              /* handle octal leading 0 */
                              if (flags & ALT && *cp != '0')
                                    *--cp = '0';
                              break;

                          case DEC:
                              /* many numbers are 1 digit */
                              while (_uquad >= 10)
                              {
                                    *--cp = to_char(_uquad % 10);
                                    _uquad /= 10;
                              }
                              *--cp = to_char(_uquad);
                              break;

                          case HEX:
                              do
                              {
                                    *--cp = xdigs[_uquad & 15];
                                    _uquad >>= 4;
                              } while (_uquad);
                              break;

                          default:
                              cp = "bug in sm_io_vfprintf: bad base";
                              size = strlen(cp);
                              goto skipsize;
                        }
                  }
                  size = buf + BUF - cp;
              skipsize:
                  break;
              default:  /* "%?" prints ?, unless ? is NUL */
                  if (ch == '\0')
                        goto done;
                  /* pretend it was %c with argument ch */
                  cp = buf;
                  *cp = ch;
                  size = 1;
                  sign = '\0';
                  break;
            }

            /*
            **  All reasonable formats wind up here.  At this point, `cp'
            **  points to a string which (if not flags&LADJUST) should be
            **  padded out to `width' places.  If flags&ZEROPAD, it should
            **  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
            **  string proper, then emit zeroes required by any leftover
            **  floating precision; finally, if LADJUST, pad with blanks.
            **
            **  Compute actual size, so we know how much to pad.
            **  size excludes decimal prec; realsz includes it.
            */

            realsz = dprec > size ? dprec : size;
            if (sign)
                  realsz++;
            else if (flags & HEXPREFIX)
                  realsz+= 2;

            /* right-adjusting blank padding */
            if ((flags & (LADJUST|ZEROPAD)) == 0)
                  PAD(width - realsz, blanks);

            /* prefix */
            if (sign)
            {
                  PRINT(&sign, 1);
            }
            else if (flags & HEXPREFIX)
            {
                  ox[0] = '0';
                  ox[1] = ch;
                  PRINT(ox, 2);
            }

            /* right-adjusting zero padding */
            if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD)
                  PAD(width - realsz, zeroes);

            /* leading zeroes from decimal precision */
            PAD(dprec - size, zeroes);

            /* the string or number proper */
            PRINT(cp, size);
            /* left-adjusting padding (always blank) */
            if (flags & LADJUST)
                  PAD(width - realsz, blanks);

            /* finally, adjust ret */
            ret += width > realsz ? width : realsz;

            FLUSH();    /* copy out the I/O vectors */
      }
done:
      FLUSH();
error:
      if ((argtable != NULL) && (argtable != statargtable))
            sm_free(argtable);
      return sm_error(fp) ? SM_IO_EOF : ret;
      /* NOTREACHED */
}

/* Type ids for argument type table. */
#define T_UNUSED  0
#define T_SHORT         1
#define T_U_SHORT 2
#define TP_SHORT  3
#define T_INT           4
#define T_U_INT         5
#define TP_INT          6
#define T_LONG          7
#define T_U_LONG  8
#define TP_LONG         9
#define T_QUAD          10
#define T_U_QUAD  11
#define TP_QUAD         12
#define T_DOUBLE  13
#define TP_CHAR         15
#define TP_VOID         16

/*
**  SM_FIND_ARGUMENTS -- find all args when a positional parameter is found.
**
**  Find all arguments when a positional parameter is encountered.  Returns a
**  table, indexed by argument number, of pointers to each arguments.  The
**  initial argument table should be an array of STATIC_ARG_TBL_SIZE entries.
**  It will be replaced with a malloc-ed one if it overflows.
**
**    Parameters:
**          fmt0 -- formating directives
**          ap -- vector list of data unit for formating consumption
**          argtable -- an indexable table (returned) of 'ap'
**
**    Results:
**          none.
*/

static void
sm_find_arguments(fmt0, ap, argtable)
      const char *fmt0;
      SM_VA_LOCAL_DECL
      va_list **argtable;
{
      register char *fmt;     /* format string */
      register int ch;  /* character from fmt */
      register int n, n2;     /* handy integer (short term usage) */
      register char *cp;      /* handy char pointer (short term usage) */
      register int flags;     /* flags as above */
      unsigned char *typetable; /* table of types */
      unsigned char stattypetable[STATIC_ARG_TBL_SIZE];
      int tablesize;          /* current size of type table */
      int tablemax;           /* largest used index in table */
      int nextarg;            /* 1-based argument index */

      /* Add an argument type to the table, expanding if necessary. */
#define ADDTYPE(type) \
      ((nextarg >= tablesize) ? \
            (sm_grow_type_table_x(&typetable, &tablesize), 0) : 0, \
      typetable[nextarg++] = type, \
      (nextarg > tablemax) ? tablemax = nextarg : 0)

#define ADDSARG() \
      ((flags & LONGINT) ? ADDTYPE(T_LONG) : \
            ((flags & SHORTINT) ? ADDTYPE(T_SHORT) : ADDTYPE(T_INT)))

#define ADDUARG() \
      ((flags & LONGINT) ? ADDTYPE(T_U_LONG) : \
            ((flags & SHORTINT) ? ADDTYPE(T_U_SHORT) : ADDTYPE(T_U_INT)))

      /* Add * arguments to the type array. */
#define ADDASTER() \
      n2 = 0; \
      cp = fmt; \
      while (is_digit(*cp)) \
      { \
            n2 = 10 * n2 + to_digit(*cp); \
            cp++; \
      } \
      if (*cp == '$') \
      { \
            int hold = nextarg; \
            nextarg = n2; \
            ADDTYPE (T_INT); \
            nextarg = hold; \
            fmt = ++cp; \
      } \
      else \
      { \
            ADDTYPE (T_INT); \
      }
      fmt = (char *) fmt0;
      typetable = stattypetable;
      tablesize = STATIC_ARG_TBL_SIZE;
      tablemax = 0;
      nextarg = 1;
      (void) memset(typetable, T_UNUSED, STATIC_ARG_TBL_SIZE);

      /* Scan the format for conversions (`%' character). */
      for (;;)
      {
            for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++)
                  /* void */;
            if (ch == '\0')
                  goto done;
            fmt++;            /* skip over '%' */

            flags = 0;

rflag:            ch = *fmt++;
reswitch:   switch (ch)
            {
              case ' ':
              case '#':
                  goto rflag;
              case '*':
                  ADDASTER();
                  goto rflag;
              case '-':
              case '+':
                  goto rflag;
              case '.':
                  if ((ch = *fmt++) == '*')
                  {
                        ADDASTER();
                        goto rflag;
                  }
                  while (is_digit(ch))
                  {
                        ch = *fmt++;
                  }
                  goto reswitch;
              case '0':
                  goto rflag;
              case '1': case '2': case '3': case '4':
              case '5': case '6': case '7': case '8': case '9':
                  n = 0;
                  do
                  {
                        n = 10 * n + to_digit(ch);
                        ch = *fmt++;
                  } while (is_digit(ch));
                  if (ch == '$')
                  {
                        nextarg = n;
                        goto rflag;
                  }
                  goto reswitch;
              case 'h':
                  flags |= SHORTINT;
                  goto rflag;
              case 'l':
                  flags |= LONGINT;
                  goto rflag;
              case 'q':
                  flags |= QUADINT;
                  goto rflag;
              case 'c':
                  ADDTYPE(T_INT);
                  break;
              case 'D':
                  flags |= LONGINT;
                  /*FALLTHROUGH*/
              case 'd':
              case 'i':
                  if (flags & QUADINT)
                  {
                        ADDTYPE(T_QUAD);
                  }
                  else
                  {
                        ADDSARG();
                  }
                  break;
              case 'e':
              case 'E':
              case 'f':
              case 'g':
              case 'G':
                  ADDTYPE(T_DOUBLE);
                  break;
              case 'n':
                  if (flags & QUADINT)
                        ADDTYPE(TP_QUAD);
                  else if (flags & LONGINT)
                        ADDTYPE(TP_LONG);
                  else if (flags & SHORTINT)
                        ADDTYPE(TP_SHORT);
                  else
                        ADDTYPE(TP_INT);
                  continue;   /* no output */
              case 'O':
                  flags |= LONGINT;
                  /*FALLTHROUGH*/
              case 'o':
                  if (flags & QUADINT)
                        ADDTYPE(T_U_QUAD);
                  else
                        ADDUARG();
                  break;
              case 'p':
                  ADDTYPE(TP_VOID);
                  break;
              case 's':
                  ADDTYPE(TP_CHAR);
                  break;
              case 'U':
                  flags |= LONGINT;
                  /*FALLTHROUGH*/
              case 'u':
                  if (flags & QUADINT)
                        ADDTYPE(T_U_QUAD);
                  else
                        ADDUARG();
                  break;
              case 'X':
              case 'x':
                  if (flags & QUADINT)
                        ADDTYPE(T_U_QUAD);
                  else
                        ADDUARG();
                  break;
              default:  /* "%?" prints ?, unless ? is NUL */
                  if (ch == '\0')
                        goto done;
                  break;
            }
      }
done:
      /* Build the argument table. */
      if (tablemax >= STATIC_ARG_TBL_SIZE)
      {
            *argtable = (va_list *)
                sm_malloc(sizeof(va_list) * (tablemax + 1));
      }

      for (n = 1; n <= tablemax; n++)
      {
            SM_VA_COPY((*argtable)[n], ap);
            switch (typetable [n])
            {
              case T_UNUSED:
                  (void) SM_VA_ARG(ap, int);
                  break;
              case T_SHORT:
                  (void) SM_VA_ARG(ap, int);
                  break;
              case T_U_SHORT:
                  (void) SM_VA_ARG(ap, int);
                  break;
              case TP_SHORT:
                  (void) SM_VA_ARG(ap, short *);
                  break;
              case T_INT:
                  (void) SM_VA_ARG(ap, int);
                  break;
              case T_U_INT:
                  (void) SM_VA_ARG(ap, unsigned int);
                  break;
              case TP_INT:
                  (void) SM_VA_ARG(ap, int *);
                  break;
              case T_LONG:
                  (void) SM_VA_ARG(ap, long);
                  break;
              case T_U_LONG:
                  (void) SM_VA_ARG(ap, unsigned long);
                  break;
              case TP_LONG:
                  (void) SM_VA_ARG(ap, long *);
                  break;
              case T_QUAD:
                  (void) SM_VA_ARG(ap, LONGLONG_T);
                  break;
              case T_U_QUAD:
                  (void) SM_VA_ARG(ap, ULONGLONG_T);
                  break;
              case TP_QUAD:
                  (void) SM_VA_ARG(ap, LONGLONG_T *);
                  break;
              case T_DOUBLE:
                  (void) SM_VA_ARG(ap, double);
                  break;
              case TP_CHAR:
                  (void) SM_VA_ARG(ap, char *);
                  break;
              case TP_VOID:
                  (void) SM_VA_ARG(ap, void *);
                  break;
            }
      }

      if ((typetable != NULL) && (typetable != stattypetable))
            sm_free(typetable);
}

/*
**  SM_GROW_TYPE_TABLE -- Increase the size of the type table.
**
**    Parameters:
**          tabletype -- type of table to grow
**          tablesize -- requested new table size
**
**    Results:
**          Raises an exception if can't allocate memory.
*/

static void
sm_grow_type_table_x(typetable, tablesize)
      unsigned char **typetable;
      int *tablesize;
{
      unsigned char *oldtable = *typetable;
      int newsize = *tablesize * 2;

      if (*tablesize == STATIC_ARG_TBL_SIZE)
      {
            *typetable = (unsigned char *) sm_malloc_x(sizeof(unsigned char)
                                             * newsize);
            (void) memmove(*typetable, oldtable, *tablesize);
      }
      else
      {
            *typetable = (unsigned char *) sm_realloc_x(typetable,
                              sizeof(unsigned char) * newsize);
      }
      (void) memset(&typetable [*tablesize], T_UNUSED,
                   (newsize - *tablesize));

      *tablesize = newsize;
}

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