summaryrefslogtreecommitdiff
path: root/support/dktools/dk4mai8dbl.c
blob: 1d9d0819076ed2852738cee323ba52462eaf2d00 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
/*
	WARNING: This file was generated by dkct.
	Changes you make here will be lost if dkct is run again!
	You should modify the original source and run dkct on it.
	Original source: dk4mai8dbl.ctr
*/

/*
Copyright (C) 2015-2017, Dirk Krause

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice,
  this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above opyright notice,
  this list of conditions and the following disclaimer in the documentation
  and/or other materials provided with the distribution.
* Neither the name of the author nor the names of contributors may be used
  to endorse or promote products derived from this software without specific
  prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED.
IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

/**	@file dk4mai8dbl.c The dk4mai8dbl module.
*/


#line 76 "dk4mai8dbl.ctr"


#include "dk4mai8dbl.h"

#include "dk4str8.h"

#if DK4_HAVE_ERRNO_H
#ifndef ERRNO_H_INCLUDED
#include <errno.h>
#define	ERRNO_H_INCLUDED 1
#endif
#endif

#if DK4_HAVE_LOCALE_H
#ifndef	LOCALE_H_INCLUDED
#include <locale.h>
#define	LOCALE_H_INCLUDED 1
#endif
#endif

#if DK4_HAVE_STDLIB_H
#ifndef STDLIB_H_INCLUDED
#include <stdlib.h>
#define	STDLIB_H_INCLUDED 1
#endif
#endif

#if DK4_HAVE_MATH_H
#ifndef MATH_H_INCLUDED
#include <math.h>
#define	MATH_H_INCLUDED 1
#endif
#endif



/**	Default locale to use.
*/
static const char	locale_kw[] = { "C" };



/**	Read double value from char string.
	@param	rp	Address of result variable.
	@param	src	String to process.
	@param	endptr	Address of pointer variable.
			A pointer to the first character not processed
			is stored here. The function may also store
			a NULL pointer here.
			The pointer variable is probably left unchanged
			on errors or if strtod() is not available on your
			system (the sscanf() function is used as fallback).
	@param	atg	Allow trailing garbage:
			0=no unprocessable trailing bytes allowed,
			1=trailing whitespaces allowed,
			2=any trailing characaters allowed.
	@param	erp	Error report, may be NULL.
	@return	1 on success, 0 on error.
	
	Error codes:
	DK4_E_INVALID_ARGUMENTS	if rp or src is NULL,
	DK4_E_SYNTAX		if there are unexpected characters in the
				string,
	DK4_E_MATH_OVERFLOW	if a mathematical overflow occurs,
	DK4_E_MATH_UNDERFLOW	if a mathematical underflow occurs.
*/

static
int
dk4ma_internal_input_c8_double(
  double	 *rp,
  const char	 *src,
  const char	**endptr,
  int		  atg,
  dk4_er_t	 *erp
)
{
#if DK4_HAVE_STRTOD || DK4_HAVE__STRTOD
  double	 val	= 0.0;
  char		*myend	= NULL;
  int		 back	= 0;
  int		 xerr	= 0;
  if ((NULL != rp) && (NULL != src)) {
    errno = 0;
#if DK4_HAVE_STRTOD
    val = strtod(src, &myend);
#else
    val = _strtod(src, &myend);
#endif
    xerr = errno;
    if (NULL != endptr) { *endptr = myend; }
    if (myend != src) {
      switch (atg) {
        case 2: {
	  back = 1;
	} break;
	case 1: {
	  if (NULL != dk4str8_start(myend, NULL)) {
	    dk4error_set_simple_error_code(erp, DK4_E_SYNTAX);
	  } else {
	    back = 1;
	  }
	} break;
	default: {
	  if ('\0' == *myend) {
	    back = 1;
	  } else {
	    dk4error_set_simple_error_code(erp, DK4_E_SYNTAX);
	  }
	} break;
      }
      if (1 == back) {
        if (ERANGE == xerr) {
	  if (HUGE_VAL == val) {
	    back = 0;
	    dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
	  }
	  if ((-HUGE_VAL) == val) {
	    back = 0;
	    dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
	  }
	  if (0.0 == val) {
	    back = 0;
	    dk4error_set_simple_error_code(erp, DK4_E_MATH_UNDERFLOW);
	  }
	}
      }
    } else {
      dk4error_set_simple_error_code(erp, DK4_E_SYNTAX);
    }
    if (1 == back) {
      *rp = val;
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  }
  return back;
#else
#if DK4_USE_PRINTF_SCANF
  double	val	= 0.0;
  int	 	back	= 0;
  if ((NULL != rp) && (NULL != src)) {
    if (1 == sscanf(src, "%lf", &val)) {
      *rp = val;
      back = 1;
    } else {
      dk4error_set_simple_error_code(erp, DK4_E_SYNTAX);
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  }
  return back;
#else
  dk4error_set_simple_error_code(erp, DK4_E_NOT_SUPPORTED);
  return 0;
#endif
#endif
}



int
dk4ma_input_c8_double(
  double	 *rp,
  const char	 *src,
  const char	**endptr,
  int		  atg,
  dk4_er_t	 *erp
)
{
#if	(DK4_HAVE_SETLOCALE) && defined(LC_NUMERIC)
  char		*oldloc	= NULL;
#endif
  int		 back	= 0;
#if	(DK4_HAVE_SETLOCALE) && defined(LC_NUMERIC)
  oldloc = setlocale(LC_NUMERIC, NULL);
  (void)setlocale(LC_NUMERIC, locale_kw);
  back = dk4ma_internal_input_c8_double(rp, src, endptr, atg, erp);
  (void)setlocale(LC_NUMERIC, oldloc);
#else
  back = dk4ma_internal_input_c8_double(rp, src, endptr, atg, erp);
#endif
  return back;
}