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|
%% options
copyright owner = Dirk Krause
copyright year = 2017-xxxx
SPDX-License-Identifier: BSD-3-Clause
%% header
/** @file dk4mao8dns.h Print double without scientific notation.
The dk4ma_write_c8_double_no_sci_to_stream() function is intended to write
coordinates to PDF, PS and EPS output.
In contrast to the dk4c8dbl_double_to_stream() function from the dk4c8dbl
this function uses parameter eps to print 0 instead of
very small absolute values.
This module is in the libdk4c library, not libdk4maio8d, as it uses
the dk4_stream_t data type and related functions.
*/
#ifndef DK4CONF_H_INCLUDED
#if DK4_BUILDING_DKTOOLS4
#include "dk4conf.h"
#else
#include <dktools-4/dk4conf.h>
#endif
#endif
#ifndef DK4TYPES_H_INCLUDED
#if DK4_BUILDING_DKTOOLS4
#include "dk4types.h"
#else
#include <dktools-4/dk4types.h>
#endif
#endif
#ifndef DK4ERROR_H_INCLUDED
#if DK4_BUILDING_DKTOOLS4
#include "dk4error.h"
#else
#include <dktools-4/dk4error.h>
#endif
#endif
#ifndef DK4STRM_H_INCLUDED
#if DK4_BUILDING_DKTOOLS4
#include "dk4strm.h"
#else
#include <dktools-4/dk4strm.h>
#endif
#endif
#ifndef STDLIB_H_INCLUDED
#include <stdlib.h>
#define STDLIB_H_INCLUDED 1
#endif
#ifdef __cplusplus
extern "C" {
#endif
/** Write a double value stored in a buffer to a stream, avoid
scientific notation.
@param strm Stream to write to.
@param buf Buffer containing string representation of double value.
The buffer contents is modified and probably
damaged during operation.
@param erp Error report, may be NULL.
@return 1 on success, 0 on error.
Error codes:
- DK4_E_INVALID_ARGUMENTS<br>
if strm or buf is NULL,
- DK4_E_WRITE_FAILED<br>
if writing one ore multiple bytes to the stream failed,
- DK4_E_FLUSH_FAILED<br>
if flushing data downwards failed,
- DK4_E_MATH_OVERFLOW<br>
if the exponent is out of range for integer values,<br>
- DK4_E_SYNTAX<br>
if input contains invalid characters.
*/
int
dk4ma_write_c8_double_string_no_sci_to_stream(
dk4_stream_t *strm,
char *buf,
dk4_er_t *erp
);
/** Write double value to stream, avoid scientific notation.
@param strm Stream to write to.
@param v Value to write.
@param eps Epsilon (values below epsilon are written as 0).
@param ex Flag: Use exact representation.
@param min Minimize text representation.
@param erp Error report, may be NULL.
@return 1 on success, 0 on error.
Error codes:
- DK4_E_INVALID_ARGUMENTS<br>
if strm is NULL.
- DK4_E_WRITE_FAILED<br>
if writing one ore multiple bytes to the stream failed,
- DK4_E_FLUSH_FAILED<br>
if flushing data downwards failed,
- DK4_E_MATH_OVERFLOW<br>
if the exponent is out of range for integer values,<br>
- DK4_E_SYNTAX<br>
if input contains invalid characters.
*/
int
dk4ma_write_c8_double_no_sci_to_stream(
dk4_stream_t *strm,
double v,
double eps,
int ex,
int min,
dk4_er_t *erp
);
#ifdef __cplusplus
}
#endif
/* vim: set ai sw=4 ts=4 : */
%% module
#include "dk4conf.h"
#ifndef DK4MAO8DNS_H_INCLUDED
#include "dk4mao8dns.h"
#endif
#if DK4_HAVE_STRING_H
#ifndef STRING_H_INCLUDED
#include <string.h>
#define STRING_H_INCLUDED 1
#endif
#endif
#if DK4_HAVE_MATH_H
#ifndef MATH_H_INCLUDED
#if DK4_ON_WINDOWS
#ifndef _USE_MATH_DEFINES
#define _USE_MATH_DEFINES 1
#endif
#endif
#include <math.h>
#define MATH_H_INCLUDED 1
#endif
#endif
#ifndef DK4MAO8DBL_H_INCLUDED
#include "dk4mao8dbl.h"
#endif
#ifndef DK4MAI8DDI_H_INCLUDED
#include "dk4mai8ddi.h"
#endif
#ifndef DK4STR8_H_INCLUDED
#include "dk4str8.h"
#endif
#if DK4_HAVE_ASSERT_H
#ifndef ASSERT_H_INCLUDED
#include <assert.h>
#define ASSERT_H_INCLUDED 1
#endif
#endif
$!trace-include
int
dk4ma_write_c8_double_string_no_sci_to_stream(
dk4_stream_t *strm,
char *buf,
dk4_er_t *erp
)
{
char *ptrex = NULL; /* Start of exponent */
char *ptrdd = NULL; /* Decimal dot */
char *ptrout = NULL; /* Character to output */
const char *endptr = NULL; /* First unusable exponent character */
dk4_im_t dotpos = (dk4_im_t)0L; /* Dot position */
dk4_im_t expon = (dk4_im_t)0L; /* Exponent */
dk4_im_t i = (dk4_im_t)0L; /* Running index */
int isneg = 0; /* Flag: Negative value */
int res = 0; /* Conversion result */
int back = 0; /* Result */
$? "+ dk4ma_write_c8_double_string_no_sci_to_stream"
#if DK4_USE_ASSERT
assert(NULL != strm);
assert(NULL != buf);
#endif
if ((NULL != strm) && (NULL != buf)) {
back = 1;
if ('-' == *buf) { $? ". negative"
isneg = 1;
buf++;
}
#if TRACE_DEBUG
else { $? ". not negative"
}
#endif
/*
Find exponent
*/
ptrex = strchr(buf, 'e');
if (NULL == ptrex) { ptrex = strchr(buf, 'E'); }
if (NULL != ptrex) {
*(ptrex++) = '\0'; $? ". exponent=\"%s\"", ptrex
if ('+' == *ptrex) { ptrex++; }
res = dk4ma_input_c8_dec_dk4_im_t(&expon, ptrex, &endptr, 1, erp);
if (0 == res) { expon = (dk4_im_t)0L; back = 0; }
$? ". exponent = %d", (int)expon
}
#if TRACE_DEBUG
else { $? ". no exponent"
}
#endif
/* Find decimal dot
*/
ptrdd = strchr(buf, '.');
if (NULL != ptrdd) { $? ". have decimal dot"
*ptrdd = '\0';
dotpos = strlen(buf);
dk4str8_cpy_to_left(ptrdd, &(ptrdd[1]));
}
else { $? ". no decimal dot"
dotpos = strlen(buf);
}
/* Calculate dot position from original position and exponent
*/
dotpos += expon; $? ". dot position = %d", (int)dotpos
/*
Write leading zero(s)
*/
if ((dk4_im_t)0L >= dotpos) { $? ". leading zeros"
if (0 != isneg) {
if (0 == dk4stream_write_byte(strm, '-', erp)) { back = 0; }
isneg = 0;
}
if (0 == dk4stream_write_byte(strm, '0', erp)) { back = 0; }
if (0 == dk4stream_write_byte(strm, '.', erp)) { back = 0; }
i = dotpos;
while ((dk4_im_t)0L > i++) {
if (0 == dk4stream_write_byte(strm, '0', erp)) { back = 0; }
}
}
#if TRACE_DEBUG
else { $? ". no leading zeros"
}
#endif
/* Write digits from buffer
*/
if (0 != isneg) { $? ". negative sign"
if (0 == dk4stream_write_byte(strm, '-', erp)) { back = 0; }
}
#if TRACE_DEBUG
else { $? ". no negative sign"
}
#endif
i = (dk4_im_t)0L;
ptrout = buf;
while ('\0' != *ptrout) {
$? ". character %c", *ptrout
$? ". dotpos=%d i=%d", (int)dotpos, (int)i
if ((dotpos == i) && ((dk4_im_t)0L != dotpos)) {
$? ". must write dot"
if (0 == dk4stream_write_byte(strm, '.', erp)) {
back = 0; $? "! write error (dot)"
}
}
$? ". going to write character"
if (0 == dk4stream_write_byte(strm, *(ptrout++), erp)) {
back = 0; $? "! write error (character)"
}
$? ". character was written"
i++;
}
/* Append trailing zero(s)
*/
$? ". appending trailing zeros i=%d dotpos=%d", (int)i, (int)dotpos
while (i++ < dotpos) {
if (0 == dk4stream_write_byte(strm, '0', erp)) {
back = 0; $? "! write error (trailing zero)"
}
}
}
else {
dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
}
$? "- dk4ma_write_c8_double_string_no_sci_to_stream %d", back
return back;
}
int
dk4ma_write_c8_double_no_sci_to_stream(
dk4_stream_t *strm,
double v,
double eps,
int ex,
int min,
dk4_er_t *erp
)
{
char buf[16*sizeof(double)];
size_t szbuf = sizeof(buf);
int back = 0;
$? "+ dk4ma_write_c8_double_no_sci_to_stream %g", v
#if DK4_USE_ASSERT
assert(NULL != strm);
#endif
if (NULL != strm) {
if (fabs(v) < eps) { $? ". 0"
back = dk4stream_write_byte(strm, '0', erp);
}
else { $? ". not 0"
if (0 != dk4ma_write_c8_double(buf, szbuf, v, ex, min, erp)) {
$? ". buf=\"%s\"", buf
back = dk4ma_write_c8_double_string_no_sci_to_stream(
strm, buf, erp
);
}
#if TRACE_DEBUG
else { $? "! dk4ma_write_c8_double"
}
#endif
}
}
else {
dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
}
$? "- dk4ma_write_c8_double_no_sci_to_stream %d", back
return back;
}
/* vim: set ai sw=4 ts=4 : */
|