/src/mpdecimal-4.0.0/libmpdec/context.c

Source (jump to first uncovered line)
/*
 * Copyright (c) 2008-2024 Stefan Krah. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 */


#include <signal.h>
#include <stdio.h>
#include <string.h>

#include "mpdecimal.h"


void
mpd_dflt_traphandler(mpd_context_t *ctx)
{
    (void)ctx;
    raise(SIGFPE);
}

void (* mpd_traphandler)(mpd_context_t *) = mpd_dflt_traphandler;


/* Set guaranteed minimum number of coefficient words. The function may
   be used once at program start. Setting MPD_MINALLOC to out-of-bounds
   values is a catastrophic error, so in that case the function exits rather
   than relying on the user to check a return value. */
void
mpd_setminalloc(mpd_ssize_t n)
{
    static int minalloc_is_set = 0;

    if (minalloc_is_set) {
        mpd_err_warn("mpd_setminalloc: ignoring request to set "
                     "MPD_MINALLOC a second time\n");
        return;
    }
    if (n < MPD_MINALLOC_MIN || n > MPD_MINALLOC_MAX) {
        mpd_err_fatal("illegal value for MPD_MINALLOC"); /* GCOV_NOT_REACHED */
    }
    MPD_MINALLOC = n;
    minalloc_is_set = 1;
}

void
mpd_init(mpd_context_t *ctx, mpd_ssize_t prec)
{
    mpd_ssize_t ideal_minalloc;

    mpd_defaultcontext(ctx);

    if (!mpd_qsetprec(ctx, prec)) {
        mpd_addstatus_raise(ctx, MPD_Invalid_context);
        return;
    }

    ideal_minalloc = 2 * ((prec+MPD_RDIGITS-1) / MPD_RDIGITS);
    if (ideal_minalloc < MPD_MINALLOC_MIN) ideal_minalloc = MPD_MINALLOC_MIN;
    if (ideal_minalloc > MPD_MINALLOC_MAX) ideal_minalloc = MPD_MINALLOC_MAX;

    mpd_setminalloc(ideal_minalloc);
}

void
mpd_maxcontext(mpd_context_t *ctx)
{
    ctx->prec=MPD_MAX_PREC;
    ctx->emax=MPD_MAX_EMAX;
    ctx->emin=MPD_MIN_EMIN;
    ctx->round=MPD_ROUND_HALF_EVEN;
    ctx->traps=MPD_Traps;
    ctx->status=0;
    ctx->newtrap=0;
    ctx->clamp=0;
    ctx->allcr=1;
}

void
mpd_defaultcontext(mpd_context_t *ctx)
{
    ctx->prec=2*MPD_RDIGITS;
    ctx->emax=MPD_MAX_EMAX;
    ctx->emin=MPD_MIN_EMIN;
    ctx->round=MPD_ROUND_HALF_UP;
    ctx->traps=MPD_Traps;
    ctx->status=0;
    ctx->newtrap=0;
    ctx->clamp=0;
    ctx->allcr=1;
}

void
mpd_basiccontext(mpd_context_t *ctx)
{
    ctx->prec=9;
    ctx->emax=MPD_MAX_EMAX;
    ctx->emin=MPD_MIN_EMIN;
    ctx->round=MPD_ROUND_HALF_UP;
    ctx->traps=MPD_Traps|MPD_Clamped;
    ctx->status=0;
    ctx->newtrap=0;
    ctx->clamp=0;
    ctx->allcr=1;
}

int
mpd_ieee_context(mpd_context_t *ctx, int bits)
{
    if (bits <= 0 || bits > MPD_IEEE_CONTEXT_MAX_BITS || bits % 32) {
        return -1;
    }

    ctx->prec = 9 * (bits/32) - 2;
    ctx->emax = 3 * ((mpd_ssize_t)1<<(bits/16+3));
    ctx->emin = 1 - ctx->emax;
    ctx->round=MPD_ROUND_HALF_EVEN;
    ctx->traps=0;
    ctx->status=0;
    ctx->newtrap=0;
    ctx->clamp=1;
    ctx->allcr=1;

    return 0;
}

mpd_ssize_t
mpd_getprec(const mpd_context_t *ctx)
{
    return ctx->prec;
}

mpd_ssize_t
mpd_getemax(const mpd_context_t *ctx)
{
    return ctx->emax;
}

mpd_ssize_t
mpd_getemin(const mpd_context_t *ctx)
{
    return ctx->emin;
}

int
mpd_getround(const mpd_context_t *ctx)
{
    return ctx->round;
}

uint32_t
mpd_gettraps(const mpd_context_t *ctx)
{
    return ctx->traps;
}

uint32_t
mpd_getstatus(const mpd_context_t *ctx)
{
    return ctx->status;
}

int
mpd_getclamp(const mpd_context_t *ctx)
{
    return ctx->clamp;
}

int
mpd_getcr(const mpd_context_t *ctx)
{
    return ctx->allcr;
}


int
mpd_qsetprec(mpd_context_t *ctx, mpd_ssize_t prec)
{
    if (prec <= 0 || prec > MPD_MAX_PREC) {
        return 0;
    }
    ctx->prec = prec;
    return 1;
}

int
mpd_qsetemax(mpd_context_t *ctx, mpd_ssize_t emax)
{
    if (emax < 0 || emax > MPD_MAX_EMAX) {
        return 0;
    }
    ctx->emax = emax;
    return 1;
}

int
mpd_qsetemin(mpd_context_t *ctx, mpd_ssize_t emin)
{
    if (emin > 0 || emin < MPD_MIN_EMIN) {
        return 0;
    }
    ctx->emin = emin;
    return 1;
}

int
mpd_qsetround(mpd_context_t *ctx, int round)
{
    if (!(0 <= round && round < MPD_ROUND_GUARD)) {
        return 0;
    }
    ctx->round = round;
    return 1;
}

int
mpd_qsettraps(mpd_context_t *ctx, uint32_t flags)
{
    if (flags > MPD_Max_status) {
        return 0;
    }
    ctx->traps = flags;
    return 1;
}

int
mpd_qsetstatus(mpd_context_t *ctx, uint32_t flags)
{
    if (flags > MPD_Max_status) {
        return 0;
    }
    ctx->status = flags;
    return 1;
}

int
mpd_qsetclamp(mpd_context_t *ctx, int c)
{
    if (c != 0 && c != 1) {
        return 0;
    }
    ctx->clamp = c;
    return 1;
}

int
mpd_qsetcr(mpd_context_t *ctx, int c)
{
    if (c != 0 && c != 1) {
        return 0;
    }
    ctx->allcr = c;
    return 1;
}


void
mpd_addstatus_raise(mpd_context_t *ctx, uint32_t flags)
{
    ctx->status |= flags;
    if (flags&ctx->traps) {
        ctx->newtrap = (flags&ctx->traps);
        mpd_traphandler(ctx);
    }
}

Coverage Report

Created: 2024-11-21 07:03

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright (c) 2008-2024 Stefan Krah. All rights reserved.
3		*
4		* Redistribution and use in source and binary forms, with or without
5		* modification, are permitted provided that the following conditions
6		* are met:
7		*
8		* 1. Redistributions of source code must retain the above copyright
9		* notice, this list of conditions and the following disclaimer.
10		* 2. Redistributions in binary form must reproduce the above copyright
11		* notice, this list of conditions and the following disclaimer in the
12		* documentation and/or other materials provided with the distribution.
13		*
14		* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15		* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16		* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17		* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18		* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19		* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20		* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21		* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22		* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23		* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24		* SUCH DAMAGE.
25		*/
26
27
28		#include <signal.h>
29		#include <stdio.h>
30		#include <string.h>
31
32		#include "mpdecimal.h"
33
34
35		void
36		mpd_dflt_traphandler(mpd_context_t *ctx)
37	0	{
38	0	(void)ctx;
39	0	raise(SIGFPE);
40	0	}
41
42		void (* mpd_traphandler)(mpd_context_t *) = mpd_dflt_traphandler;
43
44
45		/* Set guaranteed minimum number of coefficient words. The function may
46		be used once at program start. Setting MPD_MINALLOC to out-of-bounds
47		values is a catastrophic error, so in that case the function exits rather
48		than relying on the user to check a return value. */
49		void
50		mpd_setminalloc(mpd_ssize_t n)
51	10	{
52	10	static int minalloc_is_set = 0;
53
54	10	if (minalloc_is_set) {
55	0	mpd_err_warn("mpd_setminalloc: ignoring request to set "
56	0	"MPD_MINALLOC a second time\n");
57	0	return;
58	0	}
59	10	if (n < MPD_MINALLOC_MIN \|\| n > MPD_MINALLOC_MAX) {
60	0	mpd_err_fatal("illegal value for MPD_MINALLOC"); /* GCOV_NOT_REACHED */
61	0	}
62	10	MPD_MINALLOC = n;
63	10	minalloc_is_set = 1;
64	10	}
65
66		void
67		mpd_init(mpd_context_t *ctx, mpd_ssize_t prec)
68	10	{
69	10	mpd_ssize_t ideal_minalloc;
70
71	10	mpd_defaultcontext(ctx);
72
73	10	if (!mpd_qsetprec(ctx, prec)) {
74	0	mpd_addstatus_raise(ctx, MPD_Invalid_context);
75	0	return;
76	0	}
77
78	10	ideal_minalloc = 2 * ((prec+MPD_RDIGITS-1) / MPD_RDIGITS);
79	10	if (ideal_minalloc < MPD_MINALLOC_MIN) ideal_minalloc = MPD_MINALLOC_MIN;
80	10	if (ideal_minalloc > MPD_MINALLOC_MAX) ideal_minalloc = MPD_MINALLOC_MAX;
81
82	10	mpd_setminalloc(ideal_minalloc);
83	10	}
84
85		void
86		mpd_maxcontext(mpd_context_t *ctx)
87	3.50k	{
88	3.50k	ctx->prec=MPD_MAX_PREC;
89	3.50k	ctx->emax=MPD_MAX_EMAX;
90	3.50k	ctx->emin=MPD_MIN_EMIN;
91	3.50k	ctx->round=MPD_ROUND_HALF_EVEN;
92	3.50k	ctx->traps=MPD_Traps;
93	3.50k	ctx->status=0;
94	3.50k	ctx->newtrap=0;
95	3.50k	ctx->clamp=0;
96	3.50k	ctx->allcr=1;
97	3.50k	}
98
99		void
100		mpd_defaultcontext(mpd_context_t *ctx)
101	10	{
102	10	ctx->prec=2*MPD_RDIGITS;
103	10	ctx->emax=MPD_MAX_EMAX;
104	10	ctx->emin=MPD_MIN_EMIN;
105	10	ctx->round=MPD_ROUND_HALF_UP;
106	10	ctx->traps=MPD_Traps;
107	10	ctx->status=0;
108	10	ctx->newtrap=0;
109	10	ctx->clamp=0;
110	10	ctx->allcr=1;
111	10	}
112
113		void
114		mpd_basiccontext(mpd_context_t *ctx)
115	0	{
116	0	ctx->prec=9;
117	0	ctx->emax=MPD_MAX_EMAX;
118	0	ctx->emin=MPD_MIN_EMIN;
119	0	ctx->round=MPD_ROUND_HALF_UP;
120	0	ctx->traps=MPD_Traps\|MPD_Clamped;
121	0	ctx->status=0;
122	0	ctx->newtrap=0;
123	0	ctx->clamp=0;
124	0	ctx->allcr=1;
125	0	}
126
127		int
128		mpd_ieee_context(mpd_context_t *ctx, int bits)
129	0	{
130	0	if (bits <= 0 \|\| bits > MPD_IEEE_CONTEXT_MAX_BITS \|\| bits % 32) {
131	0	return -1;
132	0	}
133
134	0	ctx->prec = 9 * (bits/32) - 2;
135	0	ctx->emax = 3 * ((mpd_ssize_t)1<<(bits/16+3));
136	0	ctx->emin = 1 - ctx->emax;
137	0	ctx->round=MPD_ROUND_HALF_EVEN;
138	0	ctx->traps=0;
139	0	ctx->status=0;
140	0	ctx->newtrap=0;
141	0	ctx->clamp=1;
142	0	ctx->allcr=1;
143
144	0	return 0;
145	0	}
146
147		mpd_ssize_t
148		mpd_getprec(const mpd_context_t *ctx)
149	0	{
150	0	return ctx->prec;
151	0	}
152
153		mpd_ssize_t
154		mpd_getemax(const mpd_context_t *ctx)
155	0	{
156	0	return ctx->emax;
157	0	}
158
159		mpd_ssize_t
160		mpd_getemin(const mpd_context_t *ctx)
161	0	{
162	0	return ctx->emin;
163	0	}
164
165		int
166		mpd_getround(const mpd_context_t *ctx)
167	0	{
168	0	return ctx->round;
169	0	}
170
171		uint32_t
172		mpd_gettraps(const mpd_context_t *ctx)
173	0	{
174	0	return ctx->traps;
175	0	}
176
177		uint32_t
178		mpd_getstatus(const mpd_context_t *ctx)
179	0	{
180	0	return ctx->status;
181	0	}
182
183		int
184		mpd_getclamp(const mpd_context_t *ctx)
185	0	{
186	0	return ctx->clamp;
187	0	}
188
189		int
190		mpd_getcr(const mpd_context_t *ctx)
191	0	{
192	0	return ctx->allcr;
193	0	}
194
195
196		int
197		mpd_qsetprec(mpd_context_t *ctx, mpd_ssize_t prec)
198	10	{
199	10	if (prec <= 0 \|\| prec > MPD_MAX_PREC) {
200	0	return 0;
201	0	}
202	10	ctx->prec = prec;
203	10	return 1;
204	10	}
205
206		int
207		mpd_qsetemax(mpd_context_t *ctx, mpd_ssize_t emax)
208	0	{
209	0	if (emax < 0 \|\| emax > MPD_MAX_EMAX) {
210	0	return 0;
211	0	}
212	0	ctx->emax = emax;
213	0	return 1;
214	0	}
215
216		int
217		mpd_qsetemin(mpd_context_t *ctx, mpd_ssize_t emin)
218	0	{
219	0	if (emin > 0 \|\| emin < MPD_MIN_EMIN) {
220	0	return 0;
221	0	}
222	0	ctx->emin = emin;
223	0	return 1;
224	0	}
225
226		int
227		mpd_qsetround(mpd_context_t *ctx, int round)
228	0	{
229	0	if (!(0 <= round && round < MPD_ROUND_GUARD)) {
230	0	return 0;
231	0	}
232	0	ctx->round = round;
233	0	return 1;
234	0	}
235
236		int
237		mpd_qsettraps(mpd_context_t *ctx, uint32_t flags)
238	0	{
239	0	if (flags > MPD_Max_status) {
240	0	return 0;
241	0	}
242	0	ctx->traps = flags;
243	0	return 1;
244	0	}
245
246		int
247		mpd_qsetstatus(mpd_context_t *ctx, uint32_t flags)
248	0	{
249	0	if (flags > MPD_Max_status) {
250	0	return 0;
251	0	}
252	0	ctx->status = flags;
253	0	return 1;
254	0	}
255
256		int
257		mpd_qsetclamp(mpd_context_t *ctx, int c)
258	0	{
259	0	if (c != 0 && c != 1) {
260	0	return 0;
261	0	}
262	0	ctx->clamp = c;
263	0	return 1;
264	0	}
265
266		int
267		mpd_qsetcr(mpd_context_t *ctx, int c)
268	0	{
269	0	if (c != 0 && c != 1) {
270	0	return 0;
271	0	}
272	0	ctx->allcr = c;
273	0	return 1;
274	0	}
275
276
277		void
278		mpd_addstatus_raise(mpd_context_t *ctx, uint32_t flags)
279	64.6k	{
280	64.6k	ctx->status \|= flags;
281	64.6k	if (flags&ctx->traps) {
282	0	ctx->newtrap = (flags&ctx->traps);
283	0	mpd_traphandler(ctx);
284	0	}
285	64.6k	}