/* Copyright (C) 1997 Aladdin Enterprises.  All rights reserved.
  
  This file is part of Aladdin Ghostscript.
  
  Aladdin Ghostscript is distributed with NO WARRANTY OF ANY KIND.  No author
  or distributor accepts any responsibility for the consequences of using it,
  or for whether it serves any particular purpose or works at all, unless he
  or she says so in writing.  Refer to the Aladdin Ghostscript Free Public
  License (the "License") for full details.
  
  Every copy of Aladdin Ghostscript must include a copy of the License,
  normally in a plain ASCII text file named PUBLIC.  The License grants you
  the right to copy, modify and redistribute Aladdin Ghostscript, but only
  under certain conditions described in the License.  Among other things, the
  License requires that the copyright notice and this notice be preserved on
  all copies.
*/

/* gdevpstr.c */
/* Stream output for PostScript- and PDF-writing drivers */
#include "math_.h"		/* for fabs */
#include "stdio_.h"		/* for stream.h */
#include "string_.h"		/* for strchr */
#include "gdevpstr.h"
#include "stream.h"

/* ------ Output ------ */

/* Put a byte array on a stream. */
int
pwrite(stream *s, const void *ptr, uint count)
{	uint used;

	sputs(s, (const byte *)ptr, count, &used);
	return (int)used;
}

/* Put a string on a stream. */
int
pputs(stream *s, const char *str)
{	uint len = strlen(str);
	uint used;
	int status = sputs(s, (const byte *)str, len, &used);

	return (status >= 0 && used == len ? 0 : EOF);
}

/* Print a format string up to the first variable substitution. */
/* Return a pointer to the %, or to the terminating 0 if no % found. */
private const char *
pprintf_scan(stream *s, const char *format)
{	const char *fp = format;

	for ( ; *fp != 0; ++fp )
	  { if ( *fp == '%' )
	      { if ( fp[1] != '%' )
		  break;
	        ++fp;
	      }
	    sputc(s, *fp);
	  }
	return fp;
}

/* Print (an) int value(s) using a format. */
const char *
pprintd1(stream *s, const char *format, int v)
{	const char *fp = pprintf_scan(s, format);
	char str[25];

#ifdef DEBUG
	if ( *fp == 0 || fp[1] != 'd')	/* shouldn't happen! */
	  lprintf1("Bad format in pprintd1: %s\n", format);
#endif
	sprintf(str, "%d", v);
	pputs(s, str);
	return pprintf_scan(s, fp + 2);
}
const char *
pprintd2(stream *s, const char *format, int v1, int v2)
{	return pprintd1(s, pprintd1(s, format, v1), v2);
}

/* Print (a) floating point number(s) using a format. */
/* See gdevpdfx.h for why this is needed. */
const char *
pprintg1(stream *s, const char *format, floatp v)
{	const char *fp = pprintf_scan(s, format);
	char str[50];

#ifdef DEBUG
	if ( *fp == 0 || fp[1] != 'g' )		/* shouldn't happen! */
	  lprintf1("Bad format in pprintg: %s\n", format);
#endif
	sprintf(str, "%g", v);
	if ( strchr(str, 'e') )
	  { /* Bad news.  Try again using f-format. */
	    sprintf(str, (fabs(v) > 1 ? "%1.1f" : "%1.8f"), v);
	  }
	pputs(s, str);
	return pprintf_scan(s, fp + 2);
}
const char *
pprintg2(stream *s, const char *format, floatp v1, floatp v2)
{	return pprintg1(s, pprintg1(s, format, v1), v2);
}
const char *
pprintg4(stream *s, const char *format, floatp v1, floatp v2, floatp v3,
  floatp v4)
{	return pprintg2(s, pprintg2(s, format, v1, v2), v3, v4);
}

/* Print a long value using a format. */
const char *
pprintld1(stream *s, const char *format, long v)
{	const char *fp = pprintf_scan(s, format);
	char str[25];

#ifdef DEBUG
	if ( *fp == 0 || fp[1] != 'l' || fp[2] != 'd')	/* shouldn't happen! */
	  lprintf1("Bad format in pprintld: %s\n", format);
#endif
	sprintf(str, "%ld", v);
	pputs(s, str);
	return pprintf_scan(s, fp + 3);
}

/* Print (a) string(s) using a format. */
const char *
pprints1(stream *s, const char *format, const char *str)
{	const char *fp = pprintf_scan(s, format);

#ifdef DEBUG
	if ( *fp == 0 || fp[1] != 's' )		/* shouldn't happen! */
	  lprintf1("Bad format in pprints: %s\n", format);
#endif
	pputs(s, str);
	return pprintf_scan(s, fp + 2);
}
const char *
pprints2(stream *s, const char *format, const char *str1, const char *str2)
{	return pprints1(s, pprints1(s, format, str1), str2);
}
