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+#include <config.h>
+
+#ifndef HAVE_SNPRINTF
+
+/***************************************************************************
+ * LPRng - An Extended Print Spooler System
+ *
+ * Copyright 1988-1997, Patrick Powell, San Diego, CA
+ * papowell@sdsu.edu
+ * See below for conditions of use.
+ *
+ ***************************************************************************
+ * MODULE: snprintf.c
+ * PURPOSE: LPRng version of printf - absolutely bombproof (hopefully!)
+ **************************************************************************/
+#if 0
+
+ The "Artistic License"
+
+ Preamble
+
+The intent of this document is to state the conditions under which a
+Package may be copied, such that the Copyright Holder maintains some
+semblance of artistic control over the development of the package,
+while giving the users of the package the right to use and distribute
+the Package in a more-or-less customary fashion, plus the right to make
+reasonable modifications.
+
+Definitions:
+
+ "Package" refers to the collection of files distributed by the
+ Copyright Holder, and derivatives of that collection of files
+ created through textual modification.
+
+ "Standard Version" refers to such a Package if it has not been
+ modified, or has been modified in accordance with the wishes
+ of the Copyright Holder as specified below.
+
+ "Copyright Holder" is whoever is named in the copyright or
+ copyrights for the package.
+
+ "You" is you, if you are thinking about copying or distributing
+ this Package.
+
+ "Reasonable copying fee" is whatever you can justify on the
+ basis of media cost, duplication charges, time of people involved,
+ and so on. (You will not be required to justify it to the
+ Copyright Holder, but only to the computing community at large
+ as a market that must bear the fee.)
+
+ "Freely Available" means that no fee is charged for the item
+ itself, though there may be fees involved in handling the item.
+ It also means that recipients of the item may redistribute it
+ under the same conditions they received it.
+
+1. You may make and give away verbatim copies of the source form of the
+Standard Version of this Package without restriction, provided that you
+duplicate all of the original copyright notices and associated disclaimers.
+
+2. You may apply bug fixes, portability fixes and other modifications
+derived from the Public Domain or from the Copyright Holder. A Package
+modified in such a way shall still be considered the Standard Version.
+
+3. You may otherwise modify your copy of this Package in any way, provided
+that you insert a prominent notice in each changed file stating how and
+when you changed that file, and provided that you do at least ONE of the
+following:
+
+ a) place your modifications in the Public Domain or otherwise make them
+ Freely Available, such as by posting said modifications to Usenet or
+ an equivalent medium, or placing the modifications on a major archive
+ site such as uunet.uu.net, or by allowing the Copyright Holder to include
+ your modifications in the Standard Version of the Package.
+
+ b) use the modified Package only within your corporation or organization.
+
+ c) rename any non-standard executables so the names do not conflict
+ with standard executables, which must also be provided, and provide
+ a separate manual page for each non-standard executable that clearly
+ documents how it differs from the Standard Version.
+
+ d) make other distribution arrangements with the Copyright Holder.
+
+4. You may distribute the programs of this Package in object code or
+executable form, provided that you do at least ONE of the following:
+
+ a) distribute a Standard Version of the executables and library files,
+ together with instructions (in the manual page or equivalent) on where
+ to get the Standard Version.
+
+ b) accompany the distribution with the machine-readable source of
+ the Package with your modifications.
+
+ c) give non-standard executables non-standard names, and clearly
+ document the differences in manual pages (or equivalent), together
+ with instructions on where to get the Standard Version.
+
+ d) make other distribution arrangements with the Copyright Holder.
+
+5. You may charge a reasonable copying fee for any distribution of this
+Package. You may charge any fee you choose for support of this
+Package. You may not charge a fee for this Package itself. However,
+you may distribute this Package in aggregate with other (possibly
+commercial) programs as part of a larger (possibly commercial) software
+distribution provided that you do not advertise this Package as a
+product of your own.
+
+6. The name of the Copyright Holder may not be used to endorse or promote
+products derived from this software without specific prior written permission.
+
+7. THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR
+IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+
+ The End
+#include "lp.h"
+#endif
+
+#include <stdarg.h>
+#include <errno.h>
+#include <sys/types.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)
+
+/**** ENDINCLUDE ****/
+
+static char *const _id = "$Id: snprintf.c,v 3.2 1997/01/19 14:34:56 papowell Exp $";
+
+/*
+ * dopr(): poor man's version of doprintf
+ */
+
+static char * plp_Errormsg ( int err );
+static void dopr( char *buffer, const char *format, va_list args );
+static void fmtstr( char *value, int ljust, int len, int zpad, int precision );
+static void fmtnum( long value, int base, int dosign,
+ int ljust, int len, int zpad, int precision );
+static void fmtdouble( int fmt, double value,
+ int ljust, int len, int zpad, int precision );
+static void dostr( char * );
+static char *output;
+static void dopr_outch( int c );
+static char *end;
+int visible_control = 1;
+
+/**************************************************************
+ * 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...
+ *
+ * plp_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.
+ **************************************************************/
+
+int vsnprintf(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 ) );
+}
+
+static void dopr( char *buffer, const char *format, va_list args )
+{
+ int ch;
+ long value;
+ int longflag = 0;
+ char *strvalue;
+ int ljust;
+ int len;
+ int zpad;
+ int precision;
+ int set_precision;
+ double dval;
+ int err = errno;
+
+ output = buffer;
+ while( (ch = *format++) ){
+ switch( ch ){
+ case '%':
+ ljust = len = zpad = 0;
+ precision = -1; set_precision = 0;
+ nextch:
+ ch = *format++;
+ switch( ch ){
+ case 0:
+ dostr( "**end of format**" );
+ return;
+ case '-': ljust = 1; goto nextch;
+ case '.': set_precision = 1; precision = 0; goto nextch;
+ case '*': len = va_arg( args, int ); goto nextch;
+ case '0': /* set zero padding if len not set */
+ if(len==0 && set_precision == 0 ) zpad = '0';
+ case '1': case '2': case '3':
+ case '4': case '5': case '6':
+ case '7': case '8': case '9':
+ if( set_precision ){
+ precision = precision*10 + ch - '0';
+ } else {
+ len = len*10 + ch - '0';
+ }
+ goto nextch;
+ case 'l': longflag = 1; goto nextch;
+ case 'u': case 'U':
+ /*fmtnum(value,base,dosign,ljust,len, zpad, precision) */
+ if( longflag ){
+ value = va_arg( args, long );
+ } else {
+ value = va_arg( args, int );
+ }
+ fmtnum( value, 10,0, ljust, len, zpad, precision ); break;
+ case 'o': case 'O':
+ /*fmtnum(value,base,dosign,ljust,len, zpad, precision) */
+ if( longflag ){
+ value = va_arg( args, long );
+ } else {
+ value = va_arg( args, int );
+ }
+ fmtnum( value, 8,0, ljust, len, zpad, precision ); 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, precision ); break;
+ case 'x':
+ if( longflag ){
+ value = va_arg( args, long );
+ } else {
+ value = va_arg( args, int );
+ }
+ fmtnum( value, 16,0, ljust, len, zpad, precision ); break;
+ case 'X':
+ if( longflag ){
+ value = va_arg( args, long );
+ } else {
+ value = va_arg( args, int );
+ }
+ fmtnum( value,-16,0, ljust, len, zpad, precision ); break;
+ case 's':
+ strvalue = va_arg( args, char *);
+ fmtstr( strvalue,ljust,len, zpad, precision );
+ break;
+ case 'c':
+ ch = va_arg( args, int );
+ { char b[2];
+ int vsb = visible_control;
+ b[0] = ch;
+ b[1] = 0;
+ visible_control = 0;
+ fmtstr( b,ljust,len, zpad, precision );
+ visible_control = vsb;
+ }
+ break;
+ case 'f': case 'g':
+ dval = va_arg( args, double );
+ fmtdouble( ch, dval,ljust,len, zpad, precision ); break;
+ case 'm':
+ fmtstr( plp_Errormsg(err),ljust,len, zpad, precision ); break;
+ case '%': dopr_outch( ch ); continue;
+ default:
+ dostr( "???????" );
+ }
+ longflag = 0;
+ break;
+ default:
+ dopr_outch( ch );
+ break;
+ }
+ }
+ *output = 0;
+}
+
+/*
+ * Format '%[-]len[.precision]s'
+ * - = left justify (ljust)
+ * len = minimum length
+ * precision = numbers of chars in string to use
+ */
+static void
+fmtstr( char *value, int ljust, int len, int zpad, int precision )
+{
+ int padlen, strlen, i, c; /* amount to pad */
+
+ if( value == 0 ){
+ value = "<NULL>";
+ }
+ if( precision > 0 ){
+ strlen = precision;
+ } else {
+ /* cheap strlen so you do not have library call */
+ for( strlen = 0; (c=value[strlen]); ++ strlen ){
+ if( visible_control && iscntrl( c ) && !isspace( c ) ){
+ ++strlen;
+ }
+ }
+ }
+ padlen = len - strlen;
+ if( padlen < 0 ) padlen = 0;
+ if( ljust ) padlen = -padlen;
+ while( padlen > 0 ) {
+ dopr_outch( ' ' );
+ --padlen;
+ }
+ /* output characters */
+ for( i = 0; (c = value[i]); ++i ){
+ if( visible_control && iscntrl( c ) && !isspace( c ) ){
+ dopr_outch('^');
+ c = ('@' | (c & 0x1F));
+ }
+ dopr_outch(c);
+ }
+ while( padlen < 0 ) {
+ dopr_outch( ' ' );
+ ++padlen;
+ }
+}
+
+static void
+fmtnum( long value, int base, int dosign, int ljust,
+ int len, int zpad, int precision )
+{
+ 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
+fmtdouble( int fmt, double value, int ljust, int len, int zpad, int precision )
+{
+ char convert[128];
+ char fmtstr[128];
+ int l;
+
+ if( len == 0 ) len = 10;
+ if( len > sizeof(convert) - 10 ){
+ len = sizeof(convert) - 10;
+ }
+ if( precision > sizeof(convert) - 10 ){
+ precision = sizeof(convert) - 10;
+ }
+ if( precision > len ) precision = len;
+ strcpy( fmtstr, "%" );
+ if( ljust ) strcat(fmtstr, "-" );
+ if( len ){
+ sprintf( fmtstr+strlen(fmtstr), "%d", len );
+ }
+ if( precision > 0 ){
+ sprintf( fmtstr+strlen(fmtstr), ".%d", precision );
+ }
+ l = strlen( fmtstr );
+ fmtstr[l] = fmt;
+ fmtstr[l+1] = 0;
+ sprintf( convert, fmtstr, value );
+ dostr( convert );
+}
+
+static void dostr( char *str )
+{
+ while(*str) dopr_outch(*str++);
+}
+
+static void dopr_outch( int c )
+{
+ if( end == 0 || output < end ){
+ *output++ = c;
+ }
+}
+
+
+/****************************************************************************
+ * static char *plp_errormsg( int err )
+ * returns a printable form of the
+ * errormessage corresponding to the valie of err.
+ * This is the poor man's version of sperror(), not available on all systems
+ * Patrick Powell Tue Apr 11 08:05:05 PDT 1995
+ ****************************************************************************/
+/****************************************************************************/
+#if !defined(HAVE_STRERROR)
+
+# if defined(HAVE_SYS_NERR)
+# if !defined(HAVE_SYS_NERR_DEF)
+ extern int sys_nerr;
+# endif
+# define num_errors (sys_nerr)
+# else
+# define num_errors (-1) /* always use "errno=%d" */
+# endif
+
+# if defined(HAVE_SYS_ERRLIST)
+# if !defined(HAVE_SYS_ERRLIST_DEF)
+ extern const char *const sys_errlist[];
+# endif
+# else
+# undef num_errors
+# define num_errors (-1) /* always use "errno=%d" */
+# endif
+
+#endif
+
+static char * plp_Errormsg ( int err )
+{
+ char *cp;
+
+#if defined(HAVE_STRERROR)
+ cp = (void *)strerror(err);
+#else
+# if defined(HAVE_SYS_ERRLIST)
+ if (err >= 0 && err < num_errors) {
+ cp = (void *)sys_errlist[err];
+ } else
+# endif
+ {
+ static char msgbuf[32]; /* holds "errno=%d". */
+ /* SAFE use of sprintf */
+ (void) sprintf (msgbuf, "errno=%d", err);
+ cp = msgbuf;
+ }
+#endif
+ return (cp);
+}
+
+#if defined(TEST)
+#include <stdio.h>
+int main( void )
+{
+ char buffer[128];
+ char *t;
+ char *test1 = "01234";
+ errno = 1;
+ plp_snprintf( buffer, sizeof(buffer), (t="errno '%m'")); printf( "%s = '%s'\n", t, buffer );
+ plp_snprintf( buffer, sizeof(buffer), (t = "%s"), test1 ); printf( "%s = '%s'\n", t, buffer );
+ plp_snprintf( buffer, sizeof(buffer), (t = "%12s"), test1 ); printf( "%s = '%s'\n", t, buffer );
+ plp_snprintf( buffer, sizeof(buffer), (t = "%-12s"), test1 ); printf( "%s = '%s'\n", t, buffer );
+ plp_snprintf( buffer, sizeof(buffer), (t = "%12.2s"), test1 ); printf( "%s = '%s'\n", t, buffer );
+ plp_snprintf( buffer, sizeof(buffer), (t = "%-12.2s"), test1 ); printf( "%s = '%s'\n", t, buffer );
+ plp_snprintf( buffer, sizeof(buffer), (t = "%g"), 1.25 ); printf( "%s = '%s'\n", t, buffer );
+ plp_snprintf( buffer, sizeof(buffer), (t = "%g"), 1.2345 ); printf( "%s = '%s'\n", t, buffer );
+ plp_snprintf( buffer, sizeof(buffer), (t = "%12g"), 1.25 ); printf( "%s = '%s'\n", t, buffer );
+ plp_snprintf( buffer, sizeof(buffer), (t = "%12.2g"), 1.25 ); printf( "%s = '%s'\n", t, buffer );
+ plp_snprintf( buffer, sizeof(buffer), (t = "%0*d"), 6, 1 ); printf( "%s = '%s'\n", t, buffer );
+ return(0);
+}
+#endif
+
+
+#endif /* HAVE_SNPRINTF */
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