diff options
Diffstat (limited to 'lib/snprintf.h')
| -rw-r--r-- | lib/snprintf.h | 223 |
1 files changed, 17 insertions, 206 deletions
diff --git a/lib/snprintf.h b/lib/snprintf.h index 7a8ad4066..a72f74d63 100644 --- a/lib/snprintf.h +++ b/lib/snprintf.h @@ -1,218 +1,29 @@ -/* - Unix snprintf implementation. - Version 1.3 +/* Formatted output to strings. + Copyright (C) 2004 Free Software Foundation, Inc. + Written by Simon Josefsson. This program is free software; you can redistribute it and/or modify - it under the terms of the GNU Library General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2, or (at your option) + any later version. 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 Library General Public License for more details. + GNU General Public License for more details. - You should have received a copy of the GNU Library General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ - Revision History: - see header of snprintf.c. +#ifndef SNPRINTF_H +#define SNPRINTF_H -format: - int snprintf(holder, sizeof_holder, format, ...) +/* Get snprintf declaration, if available. */ +#include <stdio.h> -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 -*/ - -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif - -#if __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 - */ - -/* - * 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 - -/* - * If the compiler supports (long long) - */ -#ifndef LONG_LONG -# define LONG_LONG long long -/*# define LONG_LONG int64_t*/ -#endif - -/* - * If the compiler supports (long double) - */ -#ifndef LONG_DOUBLE -# define LONG_DOUBLE long double -/*# define LONG_DOUBLE double*/ +#if defined HAVE_DECL_SNPRINTF && !HAVE_DECL_SNPRINTF +int snprintf (char *str, size_t size, const char *format, ...); #endif -/* - * 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) - -#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; -#else - char *pf; -#endif -/* FLAGS */ - int width, precision; - int justify; char pad; - int square, space, star_w, star_p, a_long, a_longlong; -}; - -#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 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 *); - -#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(); -#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 /* SNPRINTF_H */ |