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Amiga Format CD 40
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Amiga Format CD40 (1999-05-11)(Future Publishing)(GB)(Track 1 of 3)[!][issue 1999-06].iso
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misc
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pdflib
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p_util.c
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1999-03-24
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/* p_util.c
* Copyright (C) 1997-98 Thomas Merz. All rights reserved.
*
* PDFlib utility routines
*/
#include <math.h>
#include <string.h>
#include "p_intern.h"
/*
* Note: although PDF doesn't impose any restrictions on
* the usable page size, Acrobat Reader and Exchange suffer
* from an architectural limit which allows pages to
* use sizes from 1 inch to 45 inches only (72-3240 pt, 2.54-114.3 cm).
*/
PDF_pagesize
a0 = {2380, 3368}, /* a0 is unusable in Acrobat 3! */
a1 = {1684, 2380},
a2 = {1190, 1684},
a3 = {842, 1190},
a4 = {595, 842},
a5 = {421, 595},
a6 = {297, 421},
b5 = {501, 709},
letter = {612, 792},
legal = {612, 1008},
ledger = {1224, 792},
p11x17 = {792, 1224};
#define NO_OF_BUFS 6 /* number of static format buffers */
static char buf_array[NO_OF_BUFS][20];
static int current_buf = 0;
/* Format floating point numbers in a PDF compatible way.
* This must be used for all floating output since PDF doesn't
* allow %g exponential format and %f produces too many characters
* in most cases.
* PDF spec says "use four or five decimal places".
*
* WARNING: This function uses a small number of cyclically reused
* static buffers. Don't use more than this number of pdf_float calls
* inside printf() or other function calls!!!
*/
char *
pdf_float(float f)
{
char *buf = buf_array[(current_buf++) % NO_OF_BUFS];
if (fabs(f) < 0.00001)
return "0"; /* force very small numbers to zero */
sprintf(buf, "%.4g", f); /* try %g first and then check output */
if (strchr(buf, 'e')) { /* this format is not PDF compatible */
if (fabs(f) < 1)
sprintf(buf, "%1.5f", f); /* 5 decimal places for small numbers */
else if (fabs(f) < 1000)
sprintf(buf, "%1.2f", f); /* 2 decimal places for medium numbers*/
else
sprintf(buf, "%1.0f", f); /* skip decimal places for big numbers*/
}
return buf;
}