+++ /dev/null
-/* 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, 2001-2011 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 3 of the License, 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. If not, see <http://www.gnu.org/licenses/>. */
-
-
-#include <config.h>
-#include <stdio.h>
-#include <ctype.h>
-#include <setjmp.h>
-
-#ifdef STDC_HEADERS
-#include <float.h>
-#endif
-
-#include <unistd.h>
-
-#include "lisp.h"
-
-/* Since we use the macro CHAR_HEAD_P, we have to include this, but
- don't have to include others because CHAR_HEAD_P does not contains
- another macro. */
-#include "character.h"
-
-#ifndef DBL_MAX_10_EXP
-#define DBL_MAX_10_EXP 308 /* IEEE double */
-#endif
-
-/* Generate output from a format-spec FORMAT,
- terminated at position FORMAT_END.
- Output goes in BUFFER, which has room for BUFSIZE chars.
- If the output does not fit, truncate it to fit.
- Returns the number of bytes stored into BUFFER.
- ARGS points to the vector of arguments, and NARGS says how many.
- A double counts as two arguments.
- String arguments are passed as C strings.
- Integers are passed as C integers. */
-
-EMACS_INT
-doprnt (char *buffer, register int bufsize, const char *format,
- const char *format_end, va_list ap)
-{
- const char *fmt = format; /* Pointer into format string */
- register char *bufptr = buffer; /* Pointer into output buffer.. */
-
- /* Use this for sprintf unless we need something really big. */
- char tembuf[DBL_MAX_10_EXP + 100];
-
- /* Size of sprintf_buffer. */
- unsigned size_allocated = sizeof (tembuf);
-
- /* Buffer to use for sprintf. Either tembuf or same as BIG_BUFFER. */
- char *sprintf_buffer = tembuf;
-
- /* Buffer we have got with malloc. */
- char *big_buffer = 0;
-
- register int tem;
- char *string;
- char fixed_buffer[20]; /* Default buffer for small formatting. */
- char *fmtcpy;
- int minlen;
- char charbuf[MAX_MULTIBYTE_LENGTH + 1]; /* Used for %c. */
-
- if (format_end == 0)
- format_end = format + strlen (format);
-
- if ((format_end - format + 1) < sizeof (fixed_buffer))
- fmtcpy = fixed_buffer;
- else
- fmtcpy = (char *) alloca (format_end - format + 1);
-
- bufsize--;
-
- /* Loop until end of format string or buffer full. */
- while (fmt != format_end && bufsize > 0)
- {
- if (*fmt == '%') /* Check for a '%' character */
- {
- unsigned size_bound = 0;
- EMACS_INT width; /* Columns occupied by STRING. */
-
- fmt++;
- /* Copy this one %-spec into fmtcpy. */
- string = fmtcpy;
- *string++ = '%';
- while (1)
- {
- *string++ = *fmt;
- if ('0' <= *fmt && *fmt <= '9')
- {
- /* Get an idea of how much space we might need.
- This might be a field width or a precision; e.g.
- %1.1000f and %1000.1f both might need 1000+ bytes.
- Parse the width or precision, checking for overflow. */
- unsigned n = *fmt - '0';
- while ('0' <= fmt[1] && fmt[1] <= '9')
- {
- if (n * 10 + fmt[1] - '0' < n)
- error ("Format width or precision too large");
- n = n * 10 + fmt[1] - '0';
- *string++ = *++fmt;
- }
-
- if (size_bound < n)
- size_bound = n;
- }
- else if (*fmt == '-' || *fmt == ' ' || *fmt == '.' || *fmt == '+')
- ;
- else
- break;
- fmt++;
- }
- *string = 0;
-
- /* Make the size bound large enough to handle floating point formats
- with large numbers. */
- if (size_bound + DBL_MAX_10_EXP + 50 < size_bound)
- error ("Format width or precision too large");
- size_bound += DBL_MAX_10_EXP + 50;
-
- /* Make sure we have that much. */
- if (size_bound > size_allocated)
- {
- if (big_buffer)
- big_buffer = (char *) xrealloc (big_buffer, size_bound);
- else
- big_buffer = (char *) xmalloc (size_bound);
- sprintf_buffer = big_buffer;
- size_allocated = size_bound;
- }
- minlen = 0;
- switch (*fmt++)
- {
- default:
- error ("Invalid format operation %%%c", fmt[-1]);
-
-/* case 'b': */
- case 'd':
- case 'o':
- case 'x':
- if (sizeof (int) == sizeof (EMACS_INT))
- ;
- else if (sizeof (long) == sizeof (EMACS_INT))
- /* Insert an `l' the right place. */
- string[1] = string[0],
- string[0] = string[-1],
- string[-1] = 'l',
- string++;
- else
- abort ();
- sprintf (sprintf_buffer, fmtcpy, va_arg(ap, char *));
- /* Now copy into final output, truncating as nec. */
- string = sprintf_buffer;
- goto doit;
-
- case 'f':
- case 'e':
- case 'g':
- {
- double d = va_arg(ap, double);
- sprintf (sprintf_buffer, fmtcpy, d);
- /* Now copy into final output, truncating as nec. */
- string = sprintf_buffer;
- goto doit;
- }
-
- case 'S':
- string[-1] = 's';
- case 's':
- if (fmtcpy[1] != 's')
- minlen = atoi (&fmtcpy[1]);
- string = va_arg (ap, char *);
- tem = strlen (string);
- width = strwidth (string, tem);
- goto doit1;
-
- /* Copy string into final output, truncating if no room. */
- doit:
- /* Coming here means STRING contains ASCII only. */
- width = tem = strlen (string);
- doit1:
- /* We have already calculated:
- TEM -- length of STRING,
- WIDTH -- columns occupied by STRING when displayed, and
- MINLEN -- minimum columns of the output. */
- if (minlen > 0)
- {
- while (minlen > width && bufsize > 0)
- {
- *bufptr++ = ' ';
- bufsize--;
- minlen--;
- }
- minlen = 0;
- }
- if (tem > bufsize)
- {
- /* Truncate the string at character boundary. */
- tem = bufsize;
- while (!CHAR_HEAD_P (string[tem - 1])) tem--;
- memcpy (bufptr, string, tem);
- /* We must calculate WIDTH again. */
- width = strwidth (bufptr, tem);
- }
- else
- memcpy (bufptr, string, tem);
- bufptr += tem;
- bufsize -= tem;
- if (minlen < 0)
- {
- while (minlen < - width && bufsize > 0)
- {
- *bufptr++ = ' ';
- bufsize--;
- minlen++;
- }
- minlen = 0;
- }
- continue;
-
- case 'c':
- {
- /* Sometimes for %c we pass a char, which would widen
- to int. Sometimes we pass XFASTINT() or XINT()
- values, which would be EMACS_INT. Let's hope that
- both are passed the same way, otherwise we'll need
- to rewrite callers. */
- EMACS_INT chr = va_arg(ap, EMACS_INT);
- tem = CHAR_STRING ((int) chr, (unsigned char *) charbuf);
- string = charbuf;
- string[tem] = 0;
- width = strwidth (string, tem);
- if (fmtcpy[1] != 'c')
- minlen = atoi (&fmtcpy[1]);
- goto doit1;
- }
-
- case '%':
- fmt--; /* Drop thru and this % will be treated as normal */
- }
- }
-
- {
- /* Just some character; Copy it if the whole multi-byte form
- fit in the buffer. */
- char *save_bufptr = bufptr;
-
- do { *bufptr++ = *fmt++; }
- while (--bufsize > 0 && !CHAR_HEAD_P (*fmt));
- if (!CHAR_HEAD_P (*fmt))
- {
- bufptr = save_bufptr;
- break;
- }
- }
- };
-
- /* If we had to malloc something, free it. */
- xfree (big_buffer);
-
- *bufptr = 0; /* Make sure our string end with a '\0' */
- return bufptr - buffer;
-}
projects / emacs.git / commitdiff