/*
- Unix snprintf implementation.
- Version 1.2
-
- This program 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 2 of the License, or
- (at your option) any later version.
- It can be redistribute also under the terms of GNU Library General
- Public Lincense.
-
- This program 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 this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- Revision History:
-
- 1.2:
- * put under LGPL.
- 1.1:
- * added changes from Miles Bader
- * corrected a bug with %f
- * added support for %#g
- * added more comments :-)
- 1.0:
- * supporting must ANSI syntaxic_sugars(see below)
- 0.0:
- * suppot %s %c %d
-
- it understands:
- Integer:
- %lu %lu %u
- %hd %ld %d decimal
- %ho %lo %o octal
- %hx %lx %x %X hexa
- Floating points:
- %g %G %e %E %f double
- Strings:
- %s %c string
- %% %
-
- Formating conversion flags:
- - justify left
- + Justify right or put a plus if number
- # prefix 0x, 0X for hexa and 0 for octal
- * precision/witdth is specify as an (int) in the arguments
- ' ' leave a blank for number with no sign
- l the later should be a long
- h the later should be a short
-
-format:
- snprintf(holder, sizeof_holder, format, ...)
-
-Return values:
- (sizeof_holder - 1)
-
-
- THANKS(for the patches and ideas):
- Miles Bader
- Cyrille Rustom
- Jacek Slabocewiz
- Mike Parker(mouse)
-
-Alain Magloire: alainm@rcsm.ee.mcgill.ca
-*/
-
-#if defined(HAVE_STDARG_H) && defined(__STDC__) && __STDC__
-#include <stdarg.h>
-#else
-#include <varargs.h>
-#endif
-
-#include <stdlib.h> /* for atoi() */
-#include <ctype.h>
-
-
-/*
- * For the FLOATING POINT FORMAT :
- * the challenge was finding a way to
- * manipulate the Real numbers without having
- * to resort to mathematical function(it
- * would require to link with -lm) and not
- * going down to the bit pattern(not portable)
- *
- * so a number, a real is:
-
- real = integral + fraction
-
- integral = ... + a(2)*10^2 + a(1)*10^1 + a(0)*10^0
- fraction = b(1)*10^-1 + b(2)*10^-2 + ...
-
- where:
- 0 <= a(i) => 9
- 0 <= b(i) => 9
-
- from then it was simple math
+ * $Id$
*/
-/*
- * size of the buffer for the integral part
- * and the fraction part
- */
-#define MAX_INT 99 + 1 /* 1 for the null */
-#define MAX_FRACT 29 + 1
-
-/*
- * numtoa() uses PRIVATE buffers to store the results,
- * So this function is not reentrant
- */
-#define itoa(n) numtoa(n, 10, 0, (char **)0)
-#define otoa(n) numtoa(n, 8, 0, (char **)0)
-#define htoa(n) numtoa(n, 16, 0, (char **)0)
-#define dtoa(n, p, f) numtoa(n, 10, p, f)
+#ifndef __ETHEREAL_SNPRINTF_H__
+#define __ETHEREAL_SNPRINTF_H__
-#define SWAP_INT(a,b) {int t; t = (a); (a) = (b); (b) = t;}
-
-/* this struct holds everything we need */
-struct DATA {
- int length;
- char *holder;
- int counter;
-#ifdef __STDC__
- const char *pf;
+#if defined(HAVE_STDARG_H)
+# include <stdarg.h>
#else
- char *pf;
+# include <varargs.h>
#endif
-/* FLAGS */
- int width, precision;
- int justify; char pad;
- int square, space, star_w, star_p, a_long ;
-};
-#define PRIVATE static
-#define PUBLIC
-/* signature of the functions */
-#ifdef __STDC__
-/* the floating point stuff */
- PRIVATE double pow_10(int);
- PRIVATE int log_10(double);
- PRIVATE double integral(double, double *);
- PRIVATE char * numtoa(double, int, int, char **);
+/* for size_t */
+#ifdef HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
-/* for the format */
- PRIVATE void conv_flag(char *, struct DATA *);
- PRIVATE void floating(struct DATA *, double);
- PRIVATE void exponent(struct DATA *, double);
- PRIVATE void decimal(struct DATA *, double);
- PRIVATE void octal(struct DATA *, double);
- PRIVATE void hexa(struct DATA *, double);
- PRIVATE void strings(struct DATA *, char *);
+extern int vsnprintf(char *string, size_t length, const char * format,
+ va_list args);
+#if __GNUC__ >= 2
+extern int snprintf(char *string, size_t length, const char * format, ...)
+ __attribute__((format (printf, 3, 4)));
#else
-/* the floating point stuff */
- PRIVATE double pow_10();
- PRIVATE int log_10();
- PRIVATE double integral();
- PRIVATE char * numtoa();
-
-/* for the format */
- PRIVATE void conv_flag();
- PRIVATE void floating();
- PRIVATE void exponent();
- PRIVATE void decimal();
- PRIVATE void octal();
- PRIVATE void hexa();
- PRIVATE void strings();
+extern int snprintf(char *string, size_t length, const char * format, ...);
#endif
-/* those are defines specific to snprintf to hopefully
- * make the code clearer :-)
- */
-#define RIGHT 1
-#define LEFT 0
-#define NOT_FOUND -1
-#define FOUND 1
-#define MAX_FIELD 15
-
-/* the conversion flags */
-#define isflag(c) ((c) == '#' || (c) == ' ' || \
- (c) == '*' || (c) == '+' || \
- (c) == '-' || (c) == '.' || \
- isdigit(c))
-
-/* round off to the precision */
-#define ROUND(d, p) \
- (d < 0.) ? \
- d - pow_10(-(p)->precision) * 0.5 : \
- d + pow_10(-(p)->precision) * 0.5
-
-/* set default precision */
-#define DEF_PREC(p) \
- if ((p)->precision == NOT_FOUND) \
- (p)->precision = 6
-
-/* put a char */
-#define PUT_CHAR(c, p) \
- if ((p)->counter < (p)->length) { \
- *(p)->holder++ = (c); \
- (p)->counter++; \
- }
-
-#define PUT_PLUS(d, p) \
- if ((d) > 0. && (p)->justify == RIGHT) \
- PUT_CHAR('+', p)
-
-#define PUT_SPACE(d, p) \
- if ((p)->space == FOUND && (d) > 0.) \
- PUT_CHAR(' ', p)
-
-/* pad right */
-#define PAD_RIGHT(p) \
- if ((p)->width > 0 && (p)->justify != LEFT) \
- for (; (p)->width > 0; (p)->width--) \
- PUT_CHAR((p)->pad, p)
-
-/* pad left */
-#define PAD_LEFT(p) \
- if ((p)->width > 0 && (p)->justify == LEFT) \
- for (; (p)->width > 0; (p)->width--) \
- PUT_CHAR((p)->pad, p)
-
-/* if width and prec. in the args */
-#define STAR_ARGS(p) \
- if ((p)->star_w == FOUND) \
- (p)->width = va_arg(args, int); \
- if ((p)->star_p == FOUND) \
- (p)->precision = va_arg(args, int)
+#endif
git.samba.org / obnox / wireshark / wip.git / blobdiff