2 * $OpenBSD: inout.c,v 1.8 2003/11/14 20:18:47 otto Exp $
3 * $DragonFly: src/usr.bin/dc/inout.c,v 1.1 2004/09/20 04:20:39 dillon Exp $
7 * Copyright (c) 2003, Otto Moerbeek <otto@drijf.net>
9 * Permission to use, copy, modify, and distribute this software for any
10 * purpose with or without fee is hereby granted, provided that the above
11 * copyright notice and this permission notice appear in all copies.
13 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
14 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
15 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
16 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
17 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
22 #include <openssl/ssl.h>
29 #define MAX_CHARS_PER_LINE 68
34 static int src_getcharstream(struct source *);
35 static int src_ungetcharstream(struct source *);
36 static char *src_getlinestream(struct source *);
37 static void src_freestream(struct source *);
38 static int src_getcharstring(struct source *);
39 static int src_ungetcharstring(struct source *);
40 static char *src_getlinestring(struct source *);
41 static void src_freestring(struct source *);
42 static void putcharwrap(FILE *, int);
43 static void printwrap(FILE *, const char *);
44 static char *get_digit(u_long, int, u_int);
46 static struct vtable stream_vtable = {
53 static struct vtable string_vtable = {
61 src_setstream(struct source *src, FILE *stream)
63 src->u.stream = stream;
64 src->vtable = &stream_vtable;
68 src_setstring(struct source *src, char *p)
70 src->u.string.buf = (u_char *)p;
71 src->u.string.pos = 0;
72 src->vtable = &string_vtable;
76 src_getcharstream(struct source *src)
78 return src->lastchar = getc(src->u.stream);
82 src_ungetcharstream(struct source *src)
84 return ungetc(src->lastchar, src->u.stream);
88 src_freestream(struct source *src)
93 src_getlinestream(struct source *src)
97 if (fgets(buf, BUFSIZ, src->u.stream) == NULL)
103 src_getcharstring(struct source *src)
105 src->lastchar = src->u.string.buf[src->u.string.pos];
106 if (src->lastchar == '\0')
110 return src->lastchar;
115 src_ungetcharstring(struct source *src)
119 if (src->u.string.pos > 0) {
120 if (src->lastchar != '\0')
122 ch = src->u.string.buf[src->u.string.pos];
123 return ch == '\0' ? EOF : ch;
129 src_getlinestring(struct source *src)
135 while (i < BUFSIZ-1) {
136 ch = src_getcharstring(src);
148 src_freestring(struct source *src)
150 free(src->u.string.buf);
154 putcharwrap(FILE *f, int ch)
157 if (++charCount > MAX_CHARS_PER_LINE) {
164 printwrap(FILE *f, const char *p)
169 snprintf(buf, sizeof(buf), "%s", p);
171 putcharwrap(f, *q++);
175 readnumber(struct source *src, u_int base)
184 bn_check(BN_zero(n->number));
186 while ((ch = (*src->vtable->readchar)(src)) != EOF) {
188 if ('0' <= ch && ch <= '9')
190 else if ('A' <= ch && ch <= 'F')
192 else if (ch == '_') {
195 } else if (ch == '.') {
201 (*src->vtable->unreadchar)(src);
207 bn_check(BN_mul_word(n->number, base));
210 /* work around a bug in BN_add_word: 0 += 0 is buggy.... */
213 bn_check(BN_add_word(n->number, v));
221 read_string(struct source *src)
223 int count, i, sz, new_sz, ch;
233 while ((ch = (*src->vtable->readchar)(src)) != EOF) {
242 if (ch == '\\' && !escape)
248 p = brealloc(p, new_sz + 1);
259 get_digit(u_long num, int digits, u_int base)
265 p[0] = num >= 10 ? num + 'A' - 10 : num + '0';
268 if (asprintf(&p, "%0*lu", digits, num) == -1)
275 printnumber(FILE *f, const struct number *b, u_int base)
277 struct number *int_part, *fract_part;
285 if (BN_is_zero(b->number))
288 int_part = new_number();
289 fract_part = new_number();
290 fract_part->scale = b->scale;
295 digits = snprintf(buf, sizeof(buf), "%u", base-1);
297 split_number(b, int_part->number, fract_part->number);
301 while (!BN_is_zero(int_part->number)) {
302 BN_ULONG rem = BN_div_word(int_part->number, base);
303 stack_pushstring(&stack, get_digit(rem, digits, base));
308 if (BN_cmp(b->number, &zero) < 0)
310 for (i = 0; i < sz; i++) {
311 p = stack_popstring(&stack);
319 struct number *num_base;
323 num_base = new_number();
324 BN_set_word(num_base->number, base);
329 scale_number(&stop, b->scale);
332 while (BN_cmp(&mult, &stop) < 0) {
339 bmul_number(fract_part, fract_part, num_base);
340 split_number(fract_part, int_part->number, NULL);
341 rem = BN_get_word(int_part->number);
342 p = get_digit(rem, digits, base);
344 normalize(int_part, fract_part->scale);
345 BN_sub(fract_part->number, fract_part->number,
349 BN_mul_word(&mult, base);
351 free_number(num_base);
355 free_number(int_part);
356 free_number(fract_part);
360 print_value(FILE *f, const struct value *value, const char *prefix, u_int base)
363 switch (value->type) {
365 if (value->array != NULL)
369 printnumber(f, value->u.num, base);
372 fputs(value->u.string, f);
378 print_ascii(FILE *f, const struct number *n)
383 v = BN_dup(n->number);
386 if (BN_cmp(v, &zero) < 0)
387 bn_check(BN_sub(v, &zero, v));
389 numbits = BN_num_bytes(v) * 8;
390 while (numbits > 0) {
392 for (i = 0; i < 8; i++)
393 ch |= BN_is_bit_set(v, numbits-i-1) << (7 - i);