[bpt/emacs.git] / src / doprnt.c

/* Output like sprintf to a buffer of specified size.
   Also takes args differently: pass one pointer to an array of strings
   in addition to the format string which is separate.
   Copyright (C) 1985 Free Software Foundation, Inc.

This file is part of GNU Emacs.

GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 1, or (at your option)
any later version.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING.  If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */


#include <stdio.h>
#include <ctype.h>

doprnt (buffer, bufsize, format, format_end, nargs, args)
     char *buffer;
     register int bufsize;
     char *format;
     char *format_end;
     int nargs;
     char **args;
{
  int cnt = 0;			/* Number of arg to gobble next */
  register char *fmt = format;	/* Pointer into format string */
  register char *bufptr = buffer; /* Pointer into output buffer.. */
  char tembuf[512];
  register int tem;
  char *string;
  char fmtcpy[20];
  int minlen;
  int size;			/* Field width factor; e.g., %90d */

  if (format_end == 0)
    format_end = format + strlen (format);

  bufsize--;
  while (fmt != format_end && bufsize > 0)	/* Loop until end of format string or buffer full */
    {
      if (*fmt == '%')	/* Check for a '%' character */
	{
	  fmt++;
	  /* Copy this one %-spec into fmtcopy.  */
	  string = fmtcpy;
	  *string++ = '%';
	  while (1)
	    {
	      *string++ = *fmt;
	      if (! (*fmt >= '0' && *fmt <= '9') && *fmt != '-' && *fmt != ' ')
		break;
	      fmt++;
	    }
	  *string = 0;
	  minlen = 0;
	  switch (*fmt++)
	    {
	    default:
	      error ("Invalid format operation %%%c", fmt[-1]);

/*	    case 'b': */
	    case 'd':
	    case 'o':
	    case 'x':
	      if (cnt == nargs)
		error ("Format string wants too many arguments");
	      sprintf (tembuf, fmtcpy, args[cnt++]);
	      /* Now copy tembuf into final output, truncating as nec.  */
	      string = tembuf;
	      goto doit;

	    case 'S':
	      string[-1] = 's';
	    case 's':
	      if (cnt == nargs)
		error ("Format string wants too many arguments");
	      string = args[cnt++];
	      if (fmtcpy[1] != 's')
		minlen = atoi (&fmtcpy[1]);
	      /* Copy string into final output, truncating if no room.  */
	    doit:
	      tem = strlen (string);
	      if (minlen > 0)
		{
		  while (minlen > tem && bufsize > 0)
		    {
		      *bufptr++ = ' ';
		      bufsize--;
		      minlen--;
		    }
		  minlen = 0;
		}
	      if (tem > bufsize)
		tem = bufsize;
	      strncpy (bufptr, string, tem);
	      bufptr += tem;
	      bufsize -= tem;
	      if (minlen < 0)
		{
		  while (minlen < - tem && bufsize > 0)
		    {
		      *bufptr++ = ' ';
		      bufsize--;
		      minlen++;
		    }
		  minlen = 0;
		}
	      continue;

	    case 'c':
	      if (cnt == nargs)
		error ("Format string wants too many arguments");
	      *bufptr++ = (int) args[cnt++];
	      bufsize--;
	      continue;

	    case '%':
	      fmt--;    /* Drop thru and this % will be treated as normal */
	    }
	}
      *bufptr++ = *fmt++;	/* Just some characters; Copy 'em */
      bufsize--;
    };

  *bufptr = 0;		/* Make sure our string end with a '\0' */
  return bufptr - buffer;
}
Commit	Line	Data
24f98398 JA	1	/* Output like sprintf to a buffer of specified size.
	2	Also takes args differently: pass one pointer to an array of strings
	3	in addition to the format string which is separate.
	4	Copyright (C) 1985 Free Software Foundation, Inc.
	5
	6	This file is part of GNU Emacs.
	7
	8	GNU Emacs is free software; you can redistribute it and/or modify
	9	it under the terms of the GNU General Public License as published by
	10	the Free Software Foundation; either version 1, or (at your option)
	11	any later version.
	12
	13	GNU Emacs is distributed in the hope that it will be useful,
	14	but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	GNU General Public License for more details.
	17
	18	You should have received a copy of the GNU General Public License
	19	along with GNU Emacs; see the file COPYING. If not, write to
	20	the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
	21
	22
	23	#include <stdio.h>
	24	#include <ctype.h>
	25
	26	doprnt (buffer, bufsize, format, format_end, nargs, args)
	27	char *buffer;
	28	register int bufsize;
	29	char *format;
	30	char *format_end;
	31	int nargs;
	32	char **args;
	33	{
	34	int cnt = 0; /* Number of arg to gobble next */
	35	register char fmt = format; / Pointer into format string */
	36	register char bufptr = buffer; / Pointer into output buffer.. */
	37	char tembuf[512];
	38	register int tem;
	39	char *string;
	40	char fmtcpy[20];
	41	int minlen;
	42	int size; /* Field width factor; e.g., %90d */
	43
	44	if (format_end == 0)
	45	format_end = format + strlen (format);
	46
	47	bufsize--;
	48	while (fmt != format_end && bufsize > 0) /* Loop until end of format string or buffer full */
	49	{
	50	if (fmt == '%') / Check for a '%' character */
	51	{
	52	fmt++;
	53	/* Copy this one %-spec into fmtcopy. */
	54	string = fmtcpy;
	55	*string++ = '%';
	56	while (1)
	57	{
	58	string++ = fmt;
	59	if (! (fmt >= '0' && fmt <= '9') && fmt != '-' && fmt != ' ')
	60	break;
	61	fmt++;
	62	}
	63	*string = 0;
	64	minlen = 0;
65	switch (*fmt++)
66	{
67	default:
68	error ("Invalid format operation %%%c", fmt[-1]);
69
70	/* case 'b': */
71	case 'd':
72	case 'o':
73	case 'x':
74	if (cnt == nargs)
75	error ("Format string wants too many arguments");
76	sprintf (tembuf, fmtcpy, args[cnt++]);
77	/* Now copy tembuf into final output, truncating as nec. */
78	string = tembuf;
79	goto doit;
80
81	case 'S':
82	string[-1] = 's';
83	case 's':
84	if (cnt == nargs)
85	error ("Format string wants too many arguments");
86	string = args[cnt++];
87	if (fmtcpy[1] != 's')
88	minlen = atoi (&fmtcpy[1]);
89	/* Copy string into final output, truncating if no room. */
90	doit:
91	tem = strlen (string);
92	if (minlen > 0)
93	{
94	while (minlen > tem && bufsize > 0)
95	{
96	*bufptr++ = ' ';
97	bufsize--;
98	minlen--;
99	}
100	minlen = 0;
101	}
102	if (tem > bufsize)
103	tem = bufsize;
104	strncpy (bufptr, string, tem);
105	bufptr += tem;
106	bufsize -= tem;
107	if (minlen < 0)
108	{
109	while (minlen < - tem && bufsize > 0)
110	{
111	*bufptr++ = ' ';
112	bufsize--;
113	minlen++;
114	}
115	minlen = 0;
116	}
117	continue;
118
119	case 'c':
120	if (cnt == nargs)
121	error ("Format string wants too many arguments");
122	*bufptr++ = (int) args[cnt++];
123	bufsize--;
124	continue;
125
126	case '%':
127	fmt--; /* Drop thru and this % will be treated as normal */
128	}
129	}
130	bufptr++ = fmt++; /* Just some characters; Copy 'em */
131	bufsize--;
132	};
133
134	bufptr = 0; / Make sure our string end with a '\0' */
135	return bufptr - buffer;
136	}