summaryrefslogtreecommitdiff
path: root/support/dktools/dk4maaul.ctr
blob: dd44c54228fcdebe918bc9340a238eb7bc1d719d (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
%%	options

copyright owner	=	Dirk Krause
copyright year	=	2015-xxxx
SPDX-License-Identifier:	BSD-3-Clause



%%	header

/**	@file
	Arithmetic operations on unsigned long.
	
	CRT on Windows: Optional.
*/

#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



#ifdef __cplusplus
extern "C" {
#endif

/**	Addition.
        @param	a	Left operand.
        @param	b	Right operand.
        @param	erp	Error report, may be NULL.
        @return	Result on success, least significant result bits
        on overflow (see ec component of erp).
        
	Error codes: DK4_E_OVERFLOW.
*/
unsigned long
dk4ma_ulong_add(unsigned long a, unsigned long b, dk4_er_t *erp);

/**	Subtraction.
        @param	a	Left operand.
        @param	b	Right operand.
        @param	erp	Error report, may be NULL.
        @return	Result on success, least significant result bits
        on overflow (see ec component of erp).
        
	Error codes: DK4_E_OVERFLOW.
*/
unsigned long
dk4ma_ulong_sub(unsigned long a, unsigned long b, dk4_er_t *erp);

/**	Multiplication.
        @param	a	Left factor.
        @param	b	right factor.
        @param	erp	Error report, may be NULL.
        @return	Result on success, least significant
        bits on overflow (see ec component of erp).
        
	Error codes: DK4_E_OVERFLOW.
*/
unsigned long
dk4ma_ulong_mul(unsigned long a, unsigned long b, dk4_er_t *erp);

/**	Division.
        @param	a	Counter (left operand).
        @param	b	Denominator (right operand).
        @param	erp	Error report, may be NULL.
        @return	Division result on success,
        ULONG_MAX on division by zero
        (see the ec component of erp).
        
	Error codes: DK4_E_MATH_DIVZERO.
*/
unsigned long
dk4ma_ulong_div(unsigned long a, unsigned long b, dk4_er_t *erp);

/**	Convert dk4_um_t value to unsigned long.
	@param	u	Value to convert.
	@param	erp	Error report, may be NULL.
	@return	Conversion result.

	Error codes: DK4_E_MATH_OVERFLOW.
*/
unsigned long
dk4ma_ulong_from(dk4_um_t u, dk4_er_t *erp);

/**	Convert double to signed char.
	@param	d	Value to convert.
	@param	erp	Error report, may be NULL.
	@return	Conversion result.

	Error codes: DK4_E_OVERFLOW.
*/
unsigned long
dk4ma_ulong_from_double(double d, dk4_er_t *erp);

#ifdef __cplusplus
}
#endif


%%	module

#include "dk4conf.h"
#include "dk4types.h"
#include "dk4error.h"
#include "dk4numco.h"
#include "dk4maaul.h"



$!trace-include



unsigned long
dk4ma_ulong_add(unsigned long a, unsigned long b, dk4_er_t *erp)
{
  $? "+ dk4ma_ulong_add %lu %lu", a, b
  $? ". ULONG_MAX = %lu", ULONG_MAX
  $? ". ULONG_MAX - a = %lu", (ULONG_MAX - a)
  $? ". b = %lu", b
  if ((ULONG_MAX - a) < b) {	$? "! overflow"
    dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
  }
  $? "- dk4ma_ulong_add %lu", (a+b)
  return (a + b);
}



unsigned long
dk4ma_ulong_sub(unsigned long a, unsigned long b, dk4_er_t *erp)
{
  if (b > a) {
    dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
  }
  return (a - b);
}



unsigned long
dk4ma_ulong_mul(unsigned long a, unsigned long b, dk4_er_t *erp)
{
  if (0UL < a) {
    if ((ULONG_MAX / a) < b) {
      dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
    }
  }
  return (a * b);
}



unsigned long
dk4ma_ulong_div(unsigned long a, unsigned long b, dk4_er_t *erp)
{
  if (0UL < b) {
    return (a / b);
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_MATH_DIVZERO);
    return (unsigned long)(ULONG_MAX);
  }
}



unsigned long
dk4ma_ulong_from(dk4_um_t u, dk4_er_t *erp)
{
	if ((dk4_um_t)(ULONG_MAX) < u) {
		dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
	}
	return ((unsigned long)u);
}



unsigned long
dk4ma_ulong_from_double(double d, dk4_er_t *erp)
{
	unsigned long	back	= 0UL;
	if ((double)(ULONG_MAX) < d) {
		dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
		back = ULONG_MAX;
	}
	else {
		if (0.0 > d) {
			dk4error_set_simple_error_code(erp,DK4_E_MATH_OVERFLOW);
		}
		else {
			back = (unsigned long)d;
		}
	}
	return  back;
}