mirror of
https://github.com/rkd77/elinks.git
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1030 lines
23 KiB
C
1030 lines
23 KiB
C
/* Own portable snprintf() implementation */
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/* These sources aren't the officially distributed version, they are modified
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* by us (ELinks coders) and some other third-party hackers. See ELinks
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* ChangeLog for details about changes we made here, comments bellow may give
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* you some indices as well. --pasky */
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/*
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* Copyright Patrick Powell 1995
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* This code is based on code written by Patrick Powell (papowell@astart.com)
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* It may be used for any purpose as long as this notice remains intact
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* on all source code distributions
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*/
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/**************************************************************
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* Original:
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* Patrick Powell Tue Apr 11 09:48:21 PDT 1995
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* A bombproof version of doprnt (dopr) included.
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* Sigh. This sort of thing is always nasty do deal with. Note that
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* the version here does not include floating point...
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*
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* snprintf() is used instead of sprintf() as it does limit checks
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* for string length. This covers a nasty loophole.
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*
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* The other functions are there to prevent NULL pointers from
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* causing nast effects.
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*
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* More Recently:
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* Brandon Long <blong@fiction.net> 9/15/96 for mutt 0.43
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* This was ugly. It is still ugly. I opted out of floating point
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* numbers, but the formatter understands just about everything
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* from the normal C string format, at least as far as I can tell from
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* the Solaris 2.5 printf(3S) man page.
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*
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* Brandon Long <blong@fiction.net> 10/22/97 for mutt 0.87.1
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* Ok, added some minimal floating point support, which means this
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* probably requires libm on most operating systems. Don't yet
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* support the exponent (e,E) and sigfig (g,G). Also, fmtint()
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* was pretty badly broken, it just wasn't being exercised in ways
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* which showed it, so that's been fixed. Also, formated the code
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* to mutt conventions, and removed dead code left over from the
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* original. Also, there is now a builtin-test, just compile with:
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* gcc -DTEST_SNPRINTF -o snprintf snprintf.c -lm
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* and run snprintf for results.
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*
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* Thomas Roessler <roessler@guug.de> 01/27/98 for mutt 0.89i
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* The PGP code was using unsigned hexadecimal formats.
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* Unfortunately, unsigned formats simply didn't work.
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*
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* Michael Elkins <me@cs.hmc.edu> 03/05/98 for mutt 0.90.8
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* The original code assumed that both snprintf() and vsnprintf() were
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* missing. Some systems only have snprintf() but not vsnprintf(), so
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* the code is now broken down under HAVE_SNPRINTF and HAVE_VSNPRINTF.
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*
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* === Samba hacking:
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*
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* Andrew Tridgell (tridge@samba.org) Oct 1998
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* fixed handling of %.0f
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* added test for HAVE_LONG_DOUBLE
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*
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* tridge@samba.org, idra@samba.org, April 2001
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* got rid of fcvt code (twas buggy and made testing harder)
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* added C99 semantics
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*
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* === About ELinks changes see ELinks' ChangeLog.
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*
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**************************************************************/
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#ifdef HAVE_CONFIG_H /* for some tests */
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#include "config.h"
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#endif
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#include <ctype.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include "elinks.h"
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#include "util/snprintf.h"
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/* #define TEST_SNPRINTF */ /* For compiling a standlone test binary. */
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#if defined(HAVE_SNPRINTF) && defined(HAVE_VSNPRINTF) && defined(HAVE_C99_VSNPRINTF)
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/* only include stdio.h if we are not re-defining snprintf or vsnprintf */
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#include <stdio.h>
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/* make the compiler happy with an empty file */
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void dummy_snprintf(void);
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void dummy_snprintf(void) {}
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#else /* defined(HAVE_SNPRINTF) && defined(HAVE_VSNPRINTF) && defined(HAVE_C99_VSNPRINTF) */
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/* TODO: Don't do all this if we just need to get own snprintf() wrapper to
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* system-provided vsnprintf(). (What an unlikely case, isn't it?) */
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#ifdef HAVE_LONG_DOUBLE
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#define LDOUBLE long double
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#else
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#define LDOUBLE double
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#endif
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#ifdef HAVE_LONG_LONG
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#define LLONG long long
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#else
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#define LLONG long
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#endif
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static size_t dopr(char *buffer, size_t maxlen, const char *format,
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va_list args_in);
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static void fmtstr(char *buffer, size_t *currlen, size_t maxlen,
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char *value, int flags, int min, int max);
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static void fmtint(char *buffer, size_t *currlen, size_t maxlen,
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long value, int base, int min, int max, int flags);
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static void fmtfp(char *buffer, size_t *currlen, size_t maxlen,
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LDOUBLE fvalue, int min, int max, int flags);
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static void dopr_outch(char *buffer, size_t *currlen, size_t maxlen, char c);
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/*
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* dopr(): poor man's version of doprintf
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*/
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/* format read states */
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#define DP_S_DEFAULT 0
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#define DP_S_FLAGS 1
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#define DP_S_MIN 2
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#define DP_S_DOT 3
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#define DP_S_MAX 4
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#define DP_S_MOD 5
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#define DP_S_CONV 6
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#define DP_S_DONE 7
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/* format flags - Bits */
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#define DP_F_MINUS (1 << 0)
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#define DP_F_PLUS (1 << 1)
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#define DP_F_SPACE (1 << 2)
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#define DP_F_NUM (1 << 3)
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#define DP_F_ZERO (1 << 4)
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#define DP_F_UP (1 << 5)
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#define DP_F_UNSIGNED (1 << 6)
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/* Conversion Flags */
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#define DP_C_SHORT 1
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#define DP_C_LONG 2
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#define DP_C_LDOUBLE 3
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#define DP_C_LLONG 4
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#define char_to_int(p) ((p)- '0')
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static char hexnumbers[] = "0123456789abcdef";
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static char HEXnumbers[] = "0123456789ABCDEF";
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static inline void
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dopr_outch(char *buffer, size_t *currlen, size_t maxlen, char c)
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{
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if (*currlen < maxlen)
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buffer[(*currlen)] = c;
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(*currlen)++;
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}
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static size_t
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dopr(char *buffer, size_t maxlen, const char *format, va_list args_in)
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{
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char ch;
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LLONG value;
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LDOUBLE fvalue;
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char *strvalue;
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int min;
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int max;
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int state;
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int flags;
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int cflags;
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size_t currlen;
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va_list args;
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VA_COPY(args, args_in);
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state = DP_S_DEFAULT;
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currlen = 0;
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flags = cflags = min = 0;
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max = -1;
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ch = *format++;
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while (state != DP_S_DONE) {
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if (ch == '\0')
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state = DP_S_DONE;
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switch (state) {
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case DP_S_DEFAULT:
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if (ch == '%')
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state = DP_S_FLAGS;
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else
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dopr_outch(buffer, &currlen, maxlen, ch);
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ch = *format++;
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break;
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case DP_S_FLAGS:
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switch (ch) {
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case '-':
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flags |= DP_F_MINUS;
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ch = *format++;
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break;
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case '+':
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flags |= DP_F_PLUS;
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ch = *format++;
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break;
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case ' ':
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flags |= DP_F_SPACE;
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ch = *format++;
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break;
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case '#':
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flags |= DP_F_NUM;
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ch = *format++;
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break;
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case '0':
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flags |= DP_F_ZERO;
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ch = *format++;
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break;
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default:
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state = DP_S_MIN;
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break;
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}
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break;
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case DP_S_MIN:
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if (isdigit((unsigned char) ch)) {
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min = 10 * min + char_to_int(ch);
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ch = *format++;
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} else if (ch == '*') {
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min = va_arg(args, int);
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ch = *format++;
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state = DP_S_DOT;
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} else {
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state = DP_S_DOT;
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}
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break;
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case DP_S_DOT:
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if (ch == '.') {
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state = DP_S_MAX;
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ch = *format++;
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} else {
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state = DP_S_MOD;
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}
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break;
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case DP_S_MAX:
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if (isdigit((unsigned char) ch)) {
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if (max < 0)
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max = 0;
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max = 10 * max + char_to_int(ch);
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ch = *format++;
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} else if (ch == '*') {
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max = va_arg(args, int);
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ch = *format++;
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state = DP_S_MOD;
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} else {
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state = DP_S_MOD;
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}
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break;
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case DP_S_MOD:
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switch (ch) {
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case 'h':
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cflags = DP_C_SHORT;
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ch = *format++;
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break;
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case 'l':
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cflags = DP_C_LONG;
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ch = *format++;
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if (ch == 'l') { /* It's a long long */
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cflags = DP_C_LLONG;
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ch = *format++;
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}
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break;
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case 'L':
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cflags = DP_C_LDOUBLE;
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ch = *format++;
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break;
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default:
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break;
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}
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state = DP_S_CONV;
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break;
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case DP_S_CONV:
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switch (ch) {
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case 'd':
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case 'i':
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if (cflags == DP_C_SHORT)
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value = va_arg(args, int);
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else if (cflags == DP_C_LONG)
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value = va_arg(args, long);
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else if (cflags == DP_C_LLONG)
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value = va_arg(args, LLONG);
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else
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value = va_arg(args, int);
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fmtint(buffer, &currlen, maxlen, value, 10, min, max, flags);
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break;
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case 'o':
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flags |= DP_F_UNSIGNED;
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if (cflags == DP_C_SHORT)
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value = va_arg(args, unsigned int);
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else if (cflags == DP_C_LONG)
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value = (long) va_arg(args, unsigned long);
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else if (cflags == DP_C_LLONG)
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value = (long) va_arg(args, unsigned LLONG);
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else
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value = (long) va_arg(args, unsigned int);
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fmtint(buffer, &currlen, maxlen, value, 8, min, max, flags);
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break;
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case 'u':
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flags |= DP_F_UNSIGNED;
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if (cflags == DP_C_SHORT)
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value = va_arg(args, unsigned int);
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else if (cflags == DP_C_LONG)
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value = (long) va_arg(args, unsigned long);
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else if (cflags == DP_C_LLONG)
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value = (LLONG) va_arg(args, unsigned LLONG);
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else
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value = (long) va_arg(args, unsigned int);
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fmtint(buffer, &currlen, maxlen, value, 10, min, max, flags);
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break;
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case 'X':
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flags |= DP_F_UP;
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case 'x':
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flags |= DP_F_UNSIGNED;
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if (cflags == DP_C_SHORT)
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value = va_arg(args, unsigned int);
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else if (cflags == DP_C_LONG)
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value = (long) va_arg(args, unsigned long);
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else if (cflags == DP_C_LLONG)
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value = (LLONG) va_arg(args, unsigned LLONG);
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else
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value = (long) va_arg(args, unsigned int);
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fmtint(buffer, &currlen, maxlen, value, 16, min, max, flags);
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break;
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case 'f':
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if (cflags == DP_C_LDOUBLE)
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fvalue = va_arg(args, LDOUBLE);
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else
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fvalue = va_arg(args, double);
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/* um, floating point? */
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fmtfp(buffer, &currlen, maxlen, fvalue, min, max, flags);
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break;
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case 'E':
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flags |= DP_F_UP;
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case 'e':
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if (cflags == DP_C_LDOUBLE)
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fvalue = va_arg(args, LDOUBLE);
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else
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fvalue = va_arg(args, double);
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fmtfp(buffer, &currlen, maxlen, fvalue, min, max, flags);
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break;
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case 'G':
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flags |= DP_F_UP;
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case 'g':
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if (cflags == DP_C_LDOUBLE)
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fvalue = va_arg(args, LDOUBLE);
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else
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fvalue = va_arg(args, double);
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fmtfp(buffer, &currlen, maxlen, fvalue, min, max, flags);
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break;
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case 'c':
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dopr_outch(buffer, &currlen, maxlen, va_arg(args, int));
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break;
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case 's':
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strvalue = va_arg(args, char *);
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if (!strvalue) strvalue = "(NULL)";
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if (max == -1) {
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max = strlen(strvalue);
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}
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if (min > 0 && max >= 0 && min > max) max = min;
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fmtstr(buffer, &currlen, maxlen, strvalue, flags, min, max);
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break;
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case 'p':
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strvalue = va_arg(args, void *);
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fmtint(buffer, &currlen, maxlen, (long) strvalue, 16, min, max, flags);
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break;
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case 'n':
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if (cflags == DP_C_SHORT) {
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short *num;
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num = va_arg(args, short *);
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*num = currlen;
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} else if (cflags == DP_C_LONG) {
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long *num;
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num = va_arg(args, long *);
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*num = (long) currlen;
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} else if (cflags == DP_C_LLONG) {
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LLONG *num;
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num = va_arg(args, LLONG *);
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*num = (LLONG) currlen;
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} else {
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int *num;
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num = va_arg(args, int *);
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*num = currlen;
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}
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break;
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case '%':
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dopr_outch(buffer, &currlen, maxlen, ch);
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break;
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case 'w':
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/* not supported yet, treat as next char */
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ch = *format++;
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break;
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default:
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/* Unknown, skip */
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break;
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}
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ch = *format++;
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state = DP_S_DEFAULT;
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flags = cflags = min = 0;
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max = -1;
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break;
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case DP_S_DONE:
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break;
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default:
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/* hmm? */
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break; /* some picky compilers need this */
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}
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}
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if (maxlen != 0) {
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if (currlen < maxlen - 1)
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buffer[currlen] = '\0';
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else if (maxlen > 0)
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buffer[maxlen - 1] = '\0';
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}
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return currlen;
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}
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static void
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fmtstr(char *buffer, size_t *currlen, size_t maxlen,
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char *value, int flags, int min, int max)
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{
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int padlen, strln; /* amount to pad */
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int cnt = 0;
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#ifdef DEBUG_SNPRINTF
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printf("fmtstr min=%d max=%d s=[%s]\n", min, max, value);
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#endif
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if (value == 0) value = "<NULL>";
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for (strln = 0; value[strln]; ++strln); /* strlen */
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padlen = min - strln;
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if (padlen < 0)
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padlen = 0;
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if (flags & DP_F_MINUS)
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padlen = -padlen; /* Left Justify */
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while ((padlen > 0) && (cnt < max)) {
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dopr_outch(buffer, currlen, maxlen, ' ');
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--padlen;
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++cnt;
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}
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while (*value && (cnt < max)) {
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dopr_outch(buffer, currlen, maxlen, *value++);
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++cnt;
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}
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while ((padlen < 0) && (cnt < max)) {
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dopr_outch(buffer, currlen, maxlen, ' ');
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++padlen;
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++cnt;
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}
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}
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/* Have to handle DP_F_NUM (ie 0x and 0 alternates) */
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static void
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fmtint(char *buffer, size_t *currlen, size_t maxlen,
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long value, int base, int min, int max, int flags)
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{
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int signvalue = 0;
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unsigned long uvalue;
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char convert[20];
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char *numbers = (char *) &hexnumbers;
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int place = 0;
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int spadlen = 0; /* amount to space pad */
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int zpadlen = 0; /* amount to zero pad */
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if (max < 0)
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max = 0;
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uvalue = value;
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if (!(flags & DP_F_UNSIGNED)) {
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if (value < 0) {
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signvalue = '-';
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uvalue = -value;
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} else {
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if (flags & DP_F_PLUS) /* Do a sign (+/i) */
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signvalue = '+';
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else if (flags & DP_F_SPACE)
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signvalue = ' ';
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}
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}
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if (flags & DP_F_UP) {
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/* Should characters be upper case? */
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numbers = (char *) &HEXnumbers;
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}
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do {
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convert[place++] = numbers[uvalue % (unsigned) base];
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uvalue = (uvalue / (unsigned) base);
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} while (uvalue && (place < 20));
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if (place == 20) place--;
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convert[place] = 0;
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zpadlen = max - place;
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spadlen = min - MAX(max, place) - (signvalue ? 1 : 0);
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if (zpadlen < 0) zpadlen = 0;
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if (spadlen < 0) spadlen = 0;
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if (flags & DP_F_ZERO) {
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zpadlen = MAX(zpadlen, spadlen);
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spadlen = 0;
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}
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if (flags & DP_F_MINUS)
|
|
spadlen = -spadlen; /* Left Justifty */
|
|
|
|
#ifdef DEBUG_SNPRINTF
|
|
printf("zpad: %d, spad: %d, min: %d, max: %d, place: %d\n",
|
|
zpadlen, spadlen, min, max, place);
|
|
#endif
|
|
|
|
/* Spaces */
|
|
while (spadlen > 0) {
|
|
dopr_outch(buffer, currlen, maxlen, ' ');
|
|
--spadlen;
|
|
}
|
|
|
|
/* Sign */
|
|
if (signvalue)
|
|
dopr_outch(buffer, currlen, maxlen, signvalue);
|
|
|
|
/* Zeros */
|
|
while (zpadlen > 0) {
|
|
dopr_outch(buffer, currlen, maxlen, '0');
|
|
--zpadlen;
|
|
}
|
|
|
|
/* Digits */
|
|
while (place > 0)
|
|
dopr_outch(buffer, currlen, maxlen, convert[--place]);
|
|
|
|
/* Left Justified spaces */
|
|
while (spadlen < 0) {
|
|
dopr_outch(buffer, currlen, maxlen, ' ');
|
|
++spadlen;
|
|
}
|
|
}
|
|
|
|
static LDOUBLE
|
|
my_abs(LDOUBLE value)
|
|
{
|
|
LDOUBLE result = value;
|
|
|
|
if (value < 0)
|
|
result = -value;
|
|
|
|
return result;
|
|
}
|
|
|
|
static LDOUBLE
|
|
my_pow10(int exp)
|
|
{
|
|
LDOUBLE result = 1;
|
|
|
|
while (exp) {
|
|
result *= 10;
|
|
exp--;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static LLONG
|
|
my_round(LDOUBLE value)
|
|
{
|
|
LLONG intpart;
|
|
|
|
intpart = (LLONG) value;
|
|
value = value - intpart;
|
|
if (value >= 0.5) intpart++;
|
|
|
|
return intpart;
|
|
}
|
|
|
|
/* a replacement for modf that doesn't need the math library. Should
|
|
be portable, but slow */
|
|
static double
|
|
my_modf(double x0, double *iptr)
|
|
{
|
|
int i;
|
|
long l;
|
|
double x = x0;
|
|
double f = 1.0;
|
|
|
|
for (i = 0; i < 100; i++) {
|
|
l = (long) x;
|
|
if (l <= (x + 1) && l >= (x - 1)) break;
|
|
x *= 0.1;
|
|
f *= 10.0;
|
|
}
|
|
|
|
if (i == 100) {
|
|
/* yikes! the number is beyond what we can handle. What do we do? */
|
|
(*iptr) = 0;
|
|
return 0;
|
|
}
|
|
|
|
if (i != 0) {
|
|
double i2;
|
|
double ret;
|
|
|
|
ret = my_modf(x0 - l * f, &i2);
|
|
(*iptr) = l * f + i2;
|
|
return ret;
|
|
}
|
|
|
|
(*iptr) = l;
|
|
return x - (*iptr);
|
|
}
|
|
|
|
static void
|
|
fmtfp(char *buffer, size_t *currlen, size_t maxlen,
|
|
LDOUBLE fvalue, int min, int max, int flags)
|
|
{
|
|
int signvalue = 0;
|
|
double ufvalue;
|
|
char iconvert[311];
|
|
char fconvert[311];
|
|
char *numbers = (char *) &hexnumbers;
|
|
int iplace = 0;
|
|
int fplace = 0;
|
|
int padlen = 0; /* amount to pad */
|
|
int zpadlen = 0;
|
|
int index;
|
|
double intpart;
|
|
double fracpart;
|
|
double temp;
|
|
LDOUBLE pow;
|
|
|
|
/*
|
|
* AIX manpage says the default is 0, but Solaris says the default
|
|
* is 6, and sprintf on AIX defaults to 6
|
|
*/
|
|
if (max < 0)
|
|
max = 6;
|
|
|
|
ufvalue = my_abs(fvalue);
|
|
|
|
if (fvalue < 0) {
|
|
signvalue = '-';
|
|
} else {
|
|
if (flags & DP_F_PLUS) { /* Do a sign (+/i) */
|
|
signvalue = '+';
|
|
} else {
|
|
if (flags & DP_F_SPACE)
|
|
signvalue = ' ';
|
|
}
|
|
}
|
|
|
|
#if 0
|
|
if (flags & DP_F_UP) {
|
|
caps = 1; /* Should characters be upper case? */
|
|
numbers = (char *) &HEXnumbers;
|
|
}
|
|
#endif
|
|
|
|
#if 0
|
|
if (max == 0) ufvalue += 0.5; /* if max = 0 we must round */
|
|
#endif
|
|
|
|
/*
|
|
* Sorry, we only support 16 digits past the decimal because of our
|
|
* conversion method
|
|
*/
|
|
if (max > 16)
|
|
max = 16;
|
|
|
|
pow = my_pow10(max);
|
|
|
|
/* We "cheat" by converting the fractional part to integer by
|
|
* multiplying by a factor of 10
|
|
*/
|
|
|
|
temp = ufvalue;
|
|
my_modf(temp, &intpart);
|
|
|
|
fracpart = my_round(pow * (ufvalue - intpart));
|
|
|
|
if (fracpart >= pow) {
|
|
intpart++;
|
|
fracpart -= pow;
|
|
}
|
|
|
|
/* Convert integer part */
|
|
do {
|
|
temp = intpart * 0.1;
|
|
my_modf(temp, &intpart);
|
|
index = (int) ((temp - intpart + 0.05) * 10.0);
|
|
#if 0
|
|
index = (int) (((double) (temp*0.1) -intpart +0.05) *10.0);
|
|
printf ("%llf, %f, %x\n", temp, intpart, index);
|
|
#endif
|
|
iconvert[iplace++] = numbers[index];
|
|
} while (intpart && (iplace < 311));
|
|
if (iplace == 311) iplace--;
|
|
iconvert[iplace] = 0;
|
|
|
|
/* Convert fractional part */
|
|
if (fracpart) {
|
|
do {
|
|
temp = fracpart * 0.1;
|
|
my_modf(temp, &fracpart);
|
|
index = (int) ((temp - fracpart + 0.05) * 10.0);
|
|
#if 0
|
|
index = (int) ((((temp/10) -fracpart) +0.05) *10);
|
|
printf ("%lf, %lf, %ld\n", temp, fracpart, index);
|
|
#endif
|
|
fconvert[fplace++] = numbers[index];
|
|
} while (fracpart && (fplace < 311));
|
|
if (fplace == 311) fplace--;
|
|
}
|
|
fconvert[fplace] = 0;
|
|
|
|
/* -1 for decimal point, another -1 if we are printing a sign */
|
|
padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0);
|
|
zpadlen = max - fplace;
|
|
if (zpadlen < 0) zpadlen = 0;
|
|
if (padlen < 0)
|
|
padlen = 0;
|
|
if (flags & DP_F_MINUS)
|
|
padlen = -padlen; /* Left Justifty */
|
|
|
|
if ((flags & DP_F_ZERO) && (padlen > 0)) {
|
|
if (signvalue) {
|
|
dopr_outch(buffer, currlen, maxlen, signvalue);
|
|
--padlen;
|
|
signvalue = 0;
|
|
}
|
|
while (padlen > 0) {
|
|
dopr_outch(buffer, currlen, maxlen, '0');
|
|
--padlen;
|
|
}
|
|
}
|
|
while (padlen > 0) {
|
|
dopr_outch(buffer, currlen, maxlen, ' ');
|
|
--padlen;
|
|
}
|
|
if (signvalue)
|
|
dopr_outch(buffer, currlen, maxlen, signvalue);
|
|
|
|
while (iplace > 0)
|
|
dopr_outch(buffer, currlen, maxlen, iconvert[--iplace]);
|
|
|
|
#ifdef DEBUG_SNPRINTF
|
|
printf("fmtfp: fplace=%d zpadlen=%d\n", fplace, zpadlen);
|
|
#endif
|
|
|
|
/*
|
|
* Decimal point. This should probably use locale to find the correct
|
|
* char to print out.
|
|
*/
|
|
if (max > 0) {
|
|
dopr_outch(buffer, currlen, maxlen, '.');
|
|
|
|
while (zpadlen > 0) {
|
|
dopr_outch(buffer, currlen, maxlen, '0');
|
|
--zpadlen;
|
|
}
|
|
|
|
while (fplace > 0)
|
|
dopr_outch(buffer, currlen, maxlen, fconvert[--fplace]);
|
|
}
|
|
|
|
while (padlen < 0) {
|
|
dopr_outch(buffer, currlen, maxlen, ' ');
|
|
++padlen;
|
|
}
|
|
}
|
|
|
|
|
|
/* Yes the following preprocessor conditions really must be a ||. Don't muck
|
|
* with this. -- tridge
|
|
*
|
|
* The logic for these is that we need our own definition if the OS *either*
|
|
* has no definition of *sprintf, or if it does have one that doesn't work
|
|
* properly according to the autoconf test. -- mbp */
|
|
|
|
#if !defined(HAVE_VSNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
|
|
int
|
|
elinks_vsnprintf(char *str, size_t count, const char *fmt, va_list args)
|
|
{
|
|
return dopr(str, count, fmt, args);
|
|
}
|
|
#endif
|
|
|
|
#if !defined(HAVE_SNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
|
|
int
|
|
elinks_snprintf(char *str, size_t count, const char *fmt, ...)
|
|
{
|
|
size_t ret;
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
/* snprintf.h makes this to expand to the right thing. */
|
|
ret = vsnprintf(str, count, fmt, ap);
|
|
va_end(ap);
|
|
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
#endif /* defined(HAVE_SNPRINTF) && defined(HAVE_VSNPRINTF) && defined(HAVE_C99_VSNPRINTF) */
|
|
|
|
|
|
#ifndef HAVE_VASPRINTF
|
|
int
|
|
elinks_vasprintf(char **ptr, const char *format, va_list ap)
|
|
{
|
|
int ret;
|
|
va_list ap2;
|
|
|
|
VA_COPY(ap2, ap);
|
|
|
|
ret = vsnprintf(NULL, 0, format, ap2);
|
|
if (ret <= 0) return ret;
|
|
|
|
/* Should we use mem_alloc() here instead of malloc() ??? --Zas */
|
|
/* No: This is an alternative to the system vasprintf.
|
|
* When the system provides vasprintf, it will use malloc(),
|
|
* which means that the string will need to be freed with free().
|
|
* If we did use mem_alloc here in our alternative to the system
|
|
* vasprintf, we would need to change all users of the memory
|
|
* allocated by vasprintf to take into account whether the system
|
|
* vasprintf (and therefore malloc) or our own vasprintf
|
|
* (and therefore mem_alloc) were used. -- Miciah */
|
|
(*ptr) = (char *) malloc(ret + 1);
|
|
if (!*ptr) return -1;
|
|
|
|
VA_COPY(ap2, ap);
|
|
|
|
return vsnprintf(*ptr, ret + 1, format, ap2);
|
|
}
|
|
#endif
|
|
|
|
|
|
#ifndef HAVE_ASPRINTF
|
|
int
|
|
elinks_asprintf(char **ptr, const char *format, ...)
|
|
{
|
|
va_list ap;
|
|
int ret;
|
|
|
|
*ptr = NULL;
|
|
va_start(ap, format);
|
|
ret = vasprintf(ptr, format, ap);
|
|
va_end(ap);
|
|
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
unsigned char *
|
|
asprintfa(const char *fmt, ...)
|
|
{
|
|
unsigned char *str;
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
str = vasprintfa(fmt, ap);
|
|
va_end(ap);
|
|
|
|
return str;
|
|
}
|
|
|
|
/* Test program */
|
|
#ifdef TEST_SNPRINTF
|
|
|
|
#include <math.h>
|
|
|
|
int sprintf(char *str,const char *fmt,...);
|
|
|
|
int
|
|
main(void)
|
|
{
|
|
char buf1[1024];
|
|
char buf2[1024];
|
|
char *fp_fmt[] = {
|
|
"%1.1f",
|
|
"%-1.5f",
|
|
"%1.5f",
|
|
"%123.9f",
|
|
"%10.5f",
|
|
"% 10.5f",
|
|
"%+22.9f",
|
|
"%+4.9f",
|
|
"%01.3f",
|
|
"%4f",
|
|
"%3.1f",
|
|
"%3.2f",
|
|
"%.0f",
|
|
"%f",
|
|
"-16.16f",
|
|
NULL
|
|
};
|
|
double fp_nums[] = { 6442452944.1234, -1.5, 134.21, 91340.2,
|
|
341.1234, 0203.9, 0.96, 0.996,
|
|
0.9996, 1.996, 4.136, 5.030201, 0};
|
|
char *int_fmt[] = {
|
|
"%-1.5d",
|
|
"%1.5d",
|
|
"%123.9d",
|
|
"%5.5d",
|
|
"%10.5d",
|
|
"% 10.5d",
|
|
"%+22.33d",
|
|
"%01.3d",
|
|
"%4d",
|
|
"%d",
|
|
NULL
|
|
};
|
|
long int_nums[] = { -1, 134, 91340, 341, 0203, 0};
|
|
char *str_fmt[] = {
|
|
"10.5s",
|
|
"5.10s",
|
|
"10.1s",
|
|
"0.10s",
|
|
"10.0s",
|
|
"1.10s",
|
|
"%s",
|
|
"%.1s",
|
|
"%.10s",
|
|
"%10s",
|
|
NULL
|
|
};
|
|
char *str_vals[] = {"hello", "a", "", "a longer string", NULL};
|
|
int x, y;
|
|
int fail = 0;
|
|
int num = 0;
|
|
|
|
printf ("Testing snprintf format codes against system sprintf...\n");
|
|
|
|
for (x = 0; fp_fmt[x] ; x++) {
|
|
for (y = 0; fp_nums[y] != 0 ; y++) {
|
|
int l1 = snprintf(NULL, 0, fp_fmt[x], fp_nums[y]);
|
|
int l2 = snprintf(buf1, sizeof(buf1), fp_fmt[x], fp_nums[y]);
|
|
|
|
sprintf(buf2, fp_fmt[x], fp_nums[y]);
|
|
if (strcmp(buf1, buf2)) {
|
|
printf("snprintf doesn't match Format: %s\n\t"
|
|
"snprintf = [%s]\n\t sprintf = [%s]\n",
|
|
fp_fmt[x], buf1, buf2);
|
|
fail++;
|
|
}
|
|
if (l1 != l2) {
|
|
printf("snprintf l1 != l2 (%d %d) %s\n", l1, l2, fp_fmt[x]);
|
|
fail++;
|
|
}
|
|
num++;
|
|
}
|
|
}
|
|
|
|
for (x = 0; int_fmt[x] ; x++) {
|
|
for (y = 0; int_nums[y] != 0 ; y++) {
|
|
int l1 = snprintf(NULL, 0, int_fmt[x], int_nums[y]);
|
|
int l2 = snprintf(buf1, sizeof(buf1), int_fmt[x], int_nums[y]);
|
|
|
|
sprintf(buf2, int_fmt[x], int_nums[y]);
|
|
if (strcmp(buf1, buf2)) {
|
|
printf("snprintf doesn't match Format: %s\n\t"
|
|
"snprintf = [%s]\n\t sprintf = [%s]\n",
|
|
int_fmt[x], buf1, buf2);
|
|
fail++;
|
|
}
|
|
if (l1 != l2) {
|
|
printf("snprintf l1 != l2 (%d %d) %s\n", l1, l2, int_fmt[x]);
|
|
fail++;
|
|
}
|
|
num++;
|
|
}
|
|
}
|
|
|
|
for (x = 0; str_fmt[x] ; x++) {
|
|
for (y = 0; str_vals[y] != 0 ; y++) {
|
|
int l1 = snprintf(NULL, 0, str_fmt[x], str_vals[y]);
|
|
int l2 = snprintf(buf1, sizeof(buf1), str_fmt[x], str_vals[y]);
|
|
|
|
sprintf(buf2, str_fmt[x], str_vals[y]);
|
|
if (strcmp(buf1, buf2)) {
|
|
printf("snprintf doesn't match Format: %s\n\t"
|
|
"snprintf = [%s]\n\t sprintf = [%s]\n",
|
|
str_fmt[x], buf1, buf2);
|
|
fail++;
|
|
}
|
|
if (l1 != l2) {
|
|
printf("snprintf l1 != l2 (%d %d) %s\n", l1, l2, str_fmt[x]);
|
|
fail++;
|
|
}
|
|
num++;
|
|
}
|
|
}
|
|
|
|
printf ("%d tests failed out of %d.\n", fail, num);
|
|
|
|
printf("seeing how many digits we support\n");
|
|
{
|
|
double v0 = 0.12345678901234567890123456789012345678901;
|
|
|
|
for ( x = 0; x < 100; x++) {
|
|
double p = pow(10, x);
|
|
double r = v0*p;
|
|
|
|
snprintf(buf1, sizeof(buf1), "%1.1f", r);
|
|
sprintf(buf2,"%1.1f", r);
|
|
if (strcmp(buf1, buf2)) {
|
|
printf("we seem to support %d digits\n", x-1);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#endif /* SNPRINTF_TEST */
|