/*static char rcsId[] = "$Id: snprintf.c,v 1.1.1.1 2004/05/06 07:26:16 bushman Exp $";*/
#include "config.h"
#ifndef HAVE_SNPRINTF
/**************************************************************
* Original:
* Patrick Powell Tue Apr 11 09:48:21 PDT 1995
* A bombproof version of doprnt (dopr) included.
* Sigh. This sort of thing is always nasty do deal with. Note that
* the version here does not include floating point...
*
* snprintf() is used instead of sprintf() as it does limit checks
* for string length. This covers a nasty loophole.
*
* The other functions are there to prevent NULL pointers from
* causing nast effects.
**************************************************************/
#include "bsdtss.h"
static void dopr();
//static char *end;
DECLARE_TSS(end, char *, 0, 0)
#define end GET_TSS(end);
#include "snprintf.h"
#include <string.h>
#ifdef HAVE_CTYPE_H
#include <ctype.h>
#endif
/* varargs declarations: */
#if defined(HAVE_STDARG_H)
#include <stdarg.h>
#define HAVE_STDARGS /* let's hope that works everywhere (mj) */
#define VA_LOCAL_DECL va_list ap;
#define VA_START(f) va_start(ap, f)
#define VA_SHIFT(v,t) ; /* no-op for ANSI */
#define VA_END va_end(ap)
#else
#if defined(HAVE_VARARGS_H)
#include <varargs.h>
#undef HAVE_STDARGS
#define VA_LOCAL_DECL va_list ap;
#define VA_START(f) va_start(ap)/* f is ignored! */
#define VA_SHIFT(v,t) v = va_arg(ap,t)
#define VA_END va_end(ap)
#else
XX **NO VARARGS ** XX
#endif
#endif
#ifdef HAVE_STDARGS
int snprintf(char *str, size_t count, const char *fmt,...);
int vsnprintf(char *str, size_t count, const char *fmt, va_list arg);
#else
int snprintf();
int vsnprintf();
#endif
int
vsnprintf(str, count, fmt, args)
char *str;
size_t count;
const char *fmt;
va_list args;
{
str[0] = 0;
end = str + count - 1;
dopr(str, fmt, args);
if (count > 0) {
end[0] = 0;
}
return (strlen(str));
}
/* VARARGS3 */
#ifdef HAVE_STDARGS
int
snprintf(char *str, size_t count, const char *fmt,...)
#else
int
snprintf(va_alist)
va_dcl
#endif
{
#ifndef HAVE_STDARGS
char *str;
size_t count;
char *fmt;
#endif
VA_LOCAL_DECL VA_START(fmt);
VA_SHIFT(str, char *);
VA_SHIFT(count, size_t);
VA_SHIFT(fmt, char *);
(void)vsnprintf(str, count, fmt, ap);
VA_END;
return (strlen(str));
}
/*
* dopr(): poor man's version of doprintf
*/
static void fmtstr(char *value, int ljust, int len, int zpad);
static void
fmtnum(long value, int base, int dosign,
int ljust, int len, int zpad);
static void dostr(char *);
//static char *output;
DECLARE_TSS(output, char *, 0, 0)
#define output GET_TSS(output)
void _snprintf_init_tss_keys()
{
INIT_TSS_KEY(end);
INIT_TSS_KEY(output);
}
static void dopr_outch(int c);
static void
dopr(buffer, format, args)
char *buffer;
char *format;
va_list args;
{
int ch;
long value;
int longflag = 0;
char *strvalue;
int ljust;
int len;
int zpad;
output = buffer;
while ((ch = *format++)) {
switch (ch) {
case '%':
ljust = len = zpad = 0;
nextch:
ch = *format++;
switch (ch) {
case 0:
dostr("**end of format**");
return;
case '-':
ljust = 1;
goto nextch;
case '0': /* set zero padding if len not set */
if (len == 0)
zpad = '0';
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
len = len * 10 + ch - '0';
goto nextch;
case 'l':
longflag = 1;
goto nextch;
case 'u':
case 'U':
/* fmtnum(value,base,dosign,ljust,len,zpad) */
if (longflag) {
value = va_arg(args, long);
} else {
value = va_arg(args, int);
}
fmtnum(value, 10, 0, ljust, len, zpad);
break;
case 'o':
case 'O':
/* fmtnum(value,base,dosign,ljust,len,zpad) */
if (longflag) {
value = va_arg(args, long);
} else {
value = va_arg(args, int);
}
fmtnum(value, 8, 0, ljust, len, zpad);
break;
case 'd':
case 'D':
if (longflag) {
value = va_arg(args, long);
} else {
value = va_arg(args, int);
}
fmtnum(value, 10, 1, ljust, len, zpad);
break;
case 'x':
if (longflag) {
value = va_arg(args, long);
} else {
value = va_arg(args, int);
}
fmtnum(value, 16, 0, ljust, len, zpad);
break;
case 'X':
if (longflag) {
value = va_arg(args, long);
} else {
value = va_arg(args, int);
}
fmtnum(value, -16, 0, ljust, len, zpad);
break;
case 's':
strvalue = va_arg(args, char *);
fmtstr(strvalue, ljust, len, zpad);
break;
case 'c':
ch = va_arg(args, int);
dopr_outch(ch);
break;
case '%':
dopr_outch(ch);
continue;
default:
dostr("???????");
}
longflag = 0;
break;
default:
dopr_outch(ch);
break;
}
}
*output = 0;
}
static void
fmtstr(value, ljust, len, zpad)
char *value;
int ljust, len, zpad;
{
int padlen, strlen; /* amount to pad */
if (value == 0) {
value = "<NULL>";
}
for (strlen = 0; value[strlen]; ++strlen); /* strlen */
padlen = len - strlen;
if (padlen < 0)
padlen = 0;
if (ljust)
padlen = -padlen;
while (padlen > 0) {
dopr_outch(' ');
--padlen;
}
dostr(value);
while (padlen < 0) {
dopr_outch(' ');
++padlen;
}
}
static void
fmtnum(value, base, dosign, ljust, len, zpad)
long value;
int base, dosign, ljust, len, zpad;
{
int signvalue = 0;
unsigned long uvalue;
char convert[20];
int place = 0;
int padlen = 0; /* amount to pad */
int caps = 0;
/*
* DEBUGP(("value 0x%x, base %d, dosign %d, ljust %d, len %d, zpad %d\n", value, base, dosign, ljust, len, zpad ));
*/
uvalue = value;
if (dosign) {
if (value < 0) {
signvalue = '-';
uvalue = -value;
}
}
if (base < 0) {
caps = 1;
base = -base;
}
do {
convert[place++] =
(caps ? "0123456789ABCDEF" : "0123456789abcdef")
[uvalue % (unsigned)base];
uvalue = (uvalue / (unsigned)base);
}
while (uvalue);
convert[place] = 0;
padlen = len - place;
if (padlen < 0)
padlen = 0;
if (ljust)
padlen = -padlen;
/*
* DEBUGP(( "str '%s', place %d, sign %c, padlen %d\n", convert,place,signvalue,padlen));
*/
if (zpad && padlen > 0) {
if (signvalue) {
dopr_outch(signvalue);
--padlen;
signvalue = 0;
}
while (padlen > 0) {
dopr_outch(zpad);
--padlen;
}
}
while (padlen > 0) {
dopr_outch(' ');
--padlen;
}
if (signvalue)
dopr_outch(signvalue);
while (place > 0)
dopr_outch(convert[--place]);
while (padlen < 0) {
dopr_outch(' ');
++padlen;
}
}
static void
dostr(str)
char *str;
{
while (*str)
dopr_outch(*str++);
}
static void
dopr_outch(c)
int c;
{
if (iscntrl(c) && c != '\n' && c != '\t') {
c = '@' + (c & 0x1F);
if (end == 0 || output < end) {
*output++ = '^';
}
}
if (end == 0 || output < end) {
*output++ = c;
}
}
#endif /* !HAVE_SNPRINTF */
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